Merge branch 'master' of https://github.com/spesmilo/electrum

RELEASE-NOTES

@@ -2,6 +2,9 @@
  * separation between plugins and GUIs
  * the daemon supports jsonrpc commands
  * new command: 'notify <address> <url>'
+ * improved coin selection to help preserve user privacy.  This is an
+   experimental feature.  Enable it by setting the Coin Selection
+   preference to Privacy.
 
 # Release 2.5.4
  * increase MIN_RELAY_TX_FEE to avoid dust transactions

contrib/make_android

@@ -1,5 +1,4 @@
-#!/usr/bin/python
-
+#!/usr/bin/python2
 
 if __name__ == '__main__':
     import sys, re, shutil, os, hashlib

contrib/make_download

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 import sys
 import re
 import hashlib

contrib/make_packages

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 
 import sys, re, shutil, os, hashlib
 import imp

contrib/sign_packages

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python2
 
 import sys, re, shutil, os, hashlib
 import imp

electrum

@@ -107,9 +107,74 @@ def init_gui(config, network, plugins):
     return gui
 
 
+def run_non_RPC(config):
+    cmdname = config.get('cmd')
 
-def init_cmdline(config):
+    storage = WalletStorage(config.get_wallet_path())
+    if storage.file_exists:
+        sys.exit("Error: Remove the existing wallet first!")
 
+    def password_dialog():
+        return prompt_password("Password (hit return if you do not wish to encrypt your wallet):")
+
+    if cmdname == 'restore':
+        text = config.get('text')
+        password = password_dialog() if Wallet.is_seed(text) or Wallet.is_xprv(text) or Wallet.is_private_key(text) else None
+        try:
+            wallet = Wallet.from_text(text, password, storage)
+        except BaseException as e:
+            sys.exit(str(e))
+        if not config.get('offline'):
+            network = Network(config)
+            network.start()
+            wallet.start_threads(network)
+            print_msg("Recovering wallet...")
+            wallet.synchronize()
+            wallet.wait_until_synchronized()
+            msg = "Recovery successful" if wallet.is_found() else "Found no history for this wallet"
+        else:
+            msg = "This wallet was restored offline. It may contain more addresses than displayed."
+        print_msg(msg)
+
+    elif cmdname == 'create':
+        password = password_dialog()
+        wallet = Wallet(storage)
+        seed = wallet.make_seed()
+        wallet.add_seed(seed, password)
+        wallet.create_master_keys(password)
+        wallet.create_main_account(password)
+        wallet.synchronize()
+        print_msg("Your wallet generation seed is:\n\"%s\"" % seed)
+        print_msg("Please keep it in a safe place; if you lose it, you will not be able to restore your wallet.")
+
+    elif cmdname == 'deseed':
+        if not wallet.seed:
+            print_msg("Error: This wallet has no seed")
+        else:
+            ns = wallet.storage.path + '.seedless'
+            print_msg("Warning: you are going to create a seedless wallet'\nIt will be saved in '%s'" % ns)
+            if raw_input("Are you sure you want to continue? (y/n) ") in ['y', 'Y', 'yes']:
+                wallet.storage.path = ns
+                wallet.seed = ''
+                wallet.storage.put('seed', '')
+                wallet.use_encryption = False
+                wallet.storage.put('use_encryption', wallet.use_encryption)
+                for k in wallet.imported_keys.keys():
+                    wallet.imported_keys[k] = ''
+                wallet.storage.put('imported_keys', wallet.imported_keys)
+                print_msg("Done.")
+            else:
+                print_msg("Action canceled.")
+        wallet.storage.write()
+        sys.exit(0)
+
+    wallet.storage.write()
+    print_msg("Wallet saved in '%s'" % wallet.storage.path)
+    sys.exit(0)
+
+
+def init_cmdline(config_options):
+    config = SimpleConfig(config_options)
     cmdname = config.get('cmd')
     cmd = known_commands[cmdname]
 
@@ -130,57 +195,11 @@ def init_cmdline(config):
     # instanciate wallet for command-line
     storage = WalletStorage(config.get_wallet_path())
 
-    if cmd.name in ['create', 'restore']:
-        if storage.file_exists:
-            sys.exit("Error: Remove the existing wallet first!")
-
-        def password_dialog():
-            return prompt_password("Password (hit return if you do not wish to encrypt your wallet):")
-
-        if cmd.name == 'restore':
-            text = config.get('text')
-            password = password_dialog() if Wallet.is_seed(text) or Wallet.is_xprv(text) or Wallet.is_private_key(text) else None
-            try:
-                wallet = Wallet.from_text(text, password, storage)
-            except BaseException as e:
-                sys.exit(str(e))
-            if not config.get('offline'):
-                network = Network(config)
-                network.start()
-                wallet.start_threads(network)
-                print_msg("Recovering wallet...")
-                wallet.synchronize()
-                wallet.wait_until_synchronized()
-                msg = "Recovery successful" if wallet.is_found() else "Found no history for this wallet"
-            else:
-                msg = "This wallet was restored offline. It may contain more addresses than displayed."
-            print_msg(msg)
-
-        else:
-            password = password_dialog()
-            wallet = Wallet(storage)
-            seed = wallet.make_seed()
-            wallet.add_seed(seed, password)
-            wallet.create_master_keys(password)
-            wallet.create_main_account(password)
-            wallet.synchronize()
-            print_msg("Your wallet generation seed is:\n\"%s\"" % seed)
-            print_msg("Please keep it in a safe place; if you lose it, you will not be able to restore your wallet.")
-
-        print_msg("Wallet saved in '%s'" % wallet.storage.path)
-        sys.exit(0)
-
     if cmd.requires_wallet and not storage.file_exists:
         print_msg("Error: Wallet file not found.")
         print_msg("Type 'electrum create' to create a new wallet, or provide a path to a wallet with the -w option")
         sys.exit(0)
 
-    # create wallet instance
-    wallet = Wallet(storage) if cmd.requires_wallet else None
-
-    # notify plugins
-    always_hook('cmdline_load_wallet', wallet)
-
     # important warning
     if cmd.name in ['getprivatekeys']:
         print_stderr("WARNING: ALL your private keys are secret.")
@@ -188,7 +207,7 @@ def init_cmdline(config):
         print_stderr("In particular, DO NOT use 'redeem private key' services proposed by third parties.")
 
     # commands needing password
-    if cmd.requires_password and wallet.use_encryption:
+    if cmd.requires_password and storage.get('use_encryption'):
         if config.get('password'):
             password = config.get('password')
         else:
@@ -196,55 +215,49 @@ def init_cmdline(config):
             if not password:
                 print_msg("Error: Password required")
                 sys.exit(1)
-            # check password
-            try:
-                seed = wallet.check_password(password)
-            except InvalidPassword:
-                print_msg("Error: This password does not decode this wallet.")
-                sys.exit(1)
     else:
         password = None
 
-    # run the command
-    if cmd.name == 'deseed':
-        if not wallet.seed:
-            print_msg("Error: This wallet has no seed")
-        else:
-            ns = wallet.storage.path + '.seedless'
-            print_msg("Warning: you are going to create a seedless wallet'\nIt will be saved in '%s'" % ns)
-            if raw_input("Are you sure you want to continue? (y/n) ") in ['y', 'Y', 'yes']:
-                wallet.storage.path = ns
-                wallet.seed = ''
-                wallet.storage.put('seed', '', True)
-                wallet.use_encryption = False
-                wallet.storage.put('use_encryption', wallet.use_encryption, True)
-                for k in wallet.imported_keys.keys():
-                    wallet.imported_keys[k] = ''
-                wallet.storage.put('imported_keys', wallet.imported_keys, True)
-                print_msg("Done.")
-            else:
-                print_msg("Action canceled.")
-        sys.exit(0)
+    config_options['password'] = password
 
-    elif cmd.name == 'password':
+    if cmd.name == 'password':
         new_password = prompt_password('New password:')
-        wallet.update_password(password, new_password)
-        sys.exit(0)
+        config_options['new_password'] = new_password
 
-    return cmd, password, wallet
+    return cmd, password
 
 
-def run_offline_command(config, cmd, wallet, password):
+def run_offline_command(config, config_options):
+    cmdname = config.get('cmd')
+    cmd = known_commands[cmdname]
+    storage = WalletStorage(config.get_wallet_path())
+    wallet = Wallet(storage) if cmd.requires_wallet else None
+    # check password
+    if cmd.requires_password and storage.get('use_encryption'):
+        password = config_options.get('password')
+        try:
+            seed = wallet.check_password(password)
+        except InvalidPassword:
+            print_msg("Error: This password does not decode this wallet.")
+            sys.exit(1)
+    if cmd.requires_network:
+        print_stderr("Warning: running command offline")
+    # notify plugins
+    always_hook('cmdline_load_wallet', wallet)
     # arguments passed to function
     args = map(lambda x: config.get(x), cmd.params)
     # decode json arguments
     args = map(json_decode, args)
     # options
     args += map(lambda x: config.get(x), cmd.options)
-    cmd_runner = Commands(config, wallet, None)
-    cmd_runner.password = password
+    cmd_runner = Commands(config, wallet, None,
+                          password=config_options.get('password'),
+                          new_password=config_options.get('new_password'))
     func = getattr(cmd_runner, cmd.name)
     result = func(*args)
+    # save wallet
+    if wallet:
+        wallet.storage.write()
     return result
 
 
@@ -308,80 +321,84 @@ if __name__ == '__main__':
         config_options['url'] = uri
 
     config = SimpleConfig(config_options)
-    cmd_name = config.get('cmd')
+    cmdname = config.get('cmd')
 
     # initialize plugins.
-    gui_name = config.get('gui', 'qt') if cmd_name == 'gui' else 'cmdline'
+    gui_name = config.get('gui', 'qt') if cmdname == 'gui' else 'cmdline'
     plugins = Plugins(config, is_bundle or is_local or is_android, gui_name)
 
-    # run command offline
-    if cmd_name not in ['gui', 'daemon']:
-        cmd, password, wallet = init_cmdline(config)
-        if not cmd.requires_network or config.get('offline'):
-            result = run_offline_command(config, cmd, wallet, password)
-            print_msg(json_encode(result))
-            sys.exit(0)
-        else:
-            config_options['password'] = password
+    # run non-RPC commands separately
+    if cmdname in ['create', 'restore', 'deseed']:
+        run_non_RPC(config)
+        sys.exit(0)
 
+    # check if a daemon is running
     server = get_daemon(config)
 
-    # daemon is running
-    if server is not None:
-        cmdname = config_options.get('cmd')
-        if cmdname == 'daemon':
-            result = server.daemon(config_options)
-        elif cmdname == 'gui':
+    if cmdname == 'gui':
+        if server is not None:
             result = server.gui(config_options)
         else:
-            result = server.run_cmdline(config_options)
-        if type(result) in [str, unicode]:
-            print_msg(result)
-        elif type(result) is dict and result.get('error'):
-            print_stderr(result.get('error'))
-        elif result is not None:
-            print_msg(json_encode(result))
-        sys.exit(0)
-
-    # daemon is not running
-    if cmd_name == 'gui':
-        if not config.get('offline'):
-            network = Network(config)
-            network.start()
-            plugins.start()
-        else:
-            network = None
-        gui = init_gui(config, network, plugins)
-        daemon = Daemon(config, network, gui)
-        daemon.start()
-        gui.main()
-        sys.exit(0)
-
-    elif cmd_name == 'daemon':
-        subcommand = config.get('subcommand')
-        if subcommand in ['status', 'stop']:
-            print_msg("Daemon not running")
-            sys.exit(1)
-        elif subcommand == 'start':
-            p = os.fork()
-            if p == 0:
+            if not config.get('offline'):
                 network = Network(config)
                 network.start()
                 plugins.start()
-                daemon = Daemon(config, network)
-                if config.get('websocket_server'):
-                    from electrum import websockets
-                    websockets.WebSocketServer(config, network).start()
-                if config.get('requests_dir'):
-                    util.check_www_dir(config.get('requests_dir'))
-                daemon.start()
-                daemon.join()
             else:
-                print_stderr("starting daemon (PID %d)"%p)
-                sys.exit(0)
+                network = None
+            gui = init_gui(config, network, plugins)
+            daemon = Daemon(config, network, gui)
+            daemon.start()
+            gui.main()
+            sys.exit(0)
+
+    elif cmdname == 'daemon':
+        if server is not None:
+            result = server.daemon(config_options)
         else:
-            print_msg("syntax: electrum daemon <start|status|stop>")
-            sys.exit(1)
+            subcommand = config.get('subcommand')
+            if subcommand in ['status', 'stop']:
+                print_msg("Daemon not running")
+                sys.exit(1)
+            elif subcommand == 'start':
+                p = os.fork()
+                if p == 0:
+                    network = Network(config)
+                    network.start()
+                    plugins.start()
+                    daemon = Daemon(config, network)
+                    if config.get('websocket_server'):
+                        from electrum import websockets
+                        websockets.WebSocketServer(config, network).start()
+                    if config.get('requests_dir'):
+                        util.check_www_dir(config.get('requests_dir'))
+                    daemon.start()
+                    daemon.join()
+                    sys.exit(0)
+                else:
+                    print_stderr("starting daemon (PID %d)"%p)
+                    sys.exit(0)
+            else:
+                print_msg("syntax: electrum daemon <start|status|stop>")
+                sys.exit(1)
+
     else:
-        print_msg("Network daemon is not running. Try 'electrum daemon start'\nIf you want to run this command offline, use the -o flag.")
-        sys.exit(1)
+        # command line
+        init_cmdline(config_options)
+        if server is not None:
+            result = server.run_cmdline(config_options)
+        else:
+            cmd = known_commands[cmdname]
+            if cmd.requires_network:
+                print_msg("Network daemon is not running. Try 'electrum daemon start'")
+                sys.exit(1)
+            else:
+                result = run_offline_command(config, config_options)
+
+    # print result
+    if type(result) in [str, unicode]:
+        print_msg(result)
+    elif type(result) is dict and result.get('error'):
+        print_stderr(result.get('error'))
+    elif result is not None:
+        print_msg(json_encode(result))
+    sys.exit(0)

gui/android.py

@@ -332,7 +332,7 @@ def get_history_values(n):
         except Exception:
             time_str = 'pending'
         conf_str = 'v' if conf else 'o'
-        label, is_default_label = wallet.get_label(tx_hash)
+        label = wallet.get_label(tx_hash)
         label = label.replace('<','').replace('>','')
         values.append((conf_str, '  ' + time_str, '  ' + format_satoshis(value, True), '  ' + label))
 

gui/gtk.py

@@ -1185,7 +1185,7 @@ class ElectrumWindow:
                 time_str = 'pending'
                 conf_icon = Gtk.STOCK_EXECUTE
 
-            label, is_default_label = self.wallet.get_label(tx_hash)
+            label = self.wallet.get_label(tx_hash)
             tooltip = tx_hash + "\n%d confirmations"%conf if tx_hash else ''
             details = self.get_tx_details(tx_hash)
 
@@ -1300,7 +1300,7 @@ class ElectrumGui():
             gap = self.config.get('gap_limit', 5)
             if gap != 5:
                 wallet.gap_limit = gap
-                wallet.storage.put('gap_limit', gap, True)
+                wallet.storage.put('gap_limit', gap)
 
             if action == 'create':
                 seed = wallet.make_seed()

gui/kivy/__init__.py

@@ -29,6 +29,7 @@ except ImportError:
 
 # minimum required version for kivy
 kivy.require('1.8.0')
+from electrum.i18n import set_language
 from kivy.logger import Logger
 from main_window import ElectrumWindow
 
@@ -39,6 +40,7 @@ class ElectrumGui:
         self.network = network
         self.config = config
         self.plugins = plugins
+        set_language(config.get('language'))
 
     def main(self):
         w = ElectrumWindow(config=self.config,

gui/kivy/main.kv

@@ -1,8 +1,11 @@
+#:import Clock kivy.clock.Clock
 #:import Window kivy.core.window.Window
 #:import Factory kivy.factory.Factory
 #:import _ electrum.i18n._
 
 # Custom Global Widgets
+<Button>
+    on_parent: self.MIN_STATE_TIME = 0.1
 
 <VGridLayout@GridLayout>:
     rows: 1
@@ -187,22 +190,44 @@
             size: self.size
             pos: self.pos
 
+<CardItem@ToggleButtonBehavior+BoxLayout>
+    size_hint: 1, None
+    height: '65dp'
+    group: 'requests'
+    padding: dp(12)
+    spacing: dp(5)
+    screen: None
+    on_release:
+        self.screen.show_menu(args[0]) if self.state == 'down' else self.screen.hide_menu()
+    canvas.before:
+        Color:
+            rgba: (0.192, .498, 0.745, 1) if self.state == 'down' else (0.3, 0.3, 0.3, 1)
+        Rectangle:
+            size: self.size
+            pos: self.pos
+
 <AddressSelector@BlueSpinner>
     icon: 'atlas://gui/kivy/theming/light/globe'
     values: [] #app.wallet.addresses() if app.wallet else []
     text: _("Select Your address")
 
-<AmountButton@Button>:
+<BlueButton@Button>:
     background_color: .238, .585, .878, 0
     halign: 'left'
     text_size: (self.width-10, None)
     size_hint: 0.5, None
-    default_text: 'Amount'
+    default_text: ''
     text: self.default_text
     padding: '5dp', '5db'
     height: '40dp'
     text_color: self.foreground_color
     foreground_color: 1, 0, 0, 1
+    canvas.before:
+        Color:
+            rgba: (0.9, .498, 0.745, 1) if self.state == 'down' else self.background_color
+        Rectangle:
+            size: self.size
+            pos: self.pos
 
 
 <TextInputBlue@TextInput>
@@ -222,24 +247,26 @@
     size_hint: 1, None
     height: '48dp'
     on_release:
-        self.parent.update_text(self.parent, self.text)
+        self.parent.update_amount(self.text)
+
 
 
 <TabbedPanelStrip>:
     on_parent:
         if self.parent: self.parent.bar_width = 0
+        if self.parent: self.parent.scroll_x = 0.5
 
 
 <TabbedCarousel>
     carousel: carousel
     do_default_tab: False
     Carousel:
-        scroll_timeout: 190
+        scroll_timeout: 250
+        scroll_distance: '20dp'
         anim_type: 'out_quart'
         min_move: .05
         anim_move_duration: .1
         anim_cancel_duration: .54
-        scroll_distance: '10dp'
         on_index: root.on_index(*args)
         id: carousel
 
@@ -281,65 +308,59 @@
     TabbedCarousel:
         id: panel
         tab_height: '48dp'
-        #default_tab: send_tab
+        tab_width: panel.width/3
+        default_tab: history_tab
         strip_border: 0, 0, 0, 0
-        HistoryScreen:
-            id: history_screen
-            tab: history_tab
+        InvoicesScreen:
+            id: invoices_screen
+            tab: invoices_tab
         SendScreen:
             id: send_screen
             tab: send_tab
+        HistoryScreen:
+            id: history_screen
+            tab: history_tab
         ReceiveScreen:
             id: receive_screen
             tab: receive_tab
-        ContactsScreen:
-            id: contacts_screen
-            tab: contacts_tab
+        RequestsScreen:
+            id: requests_screen
+            tab: requests_tab
+        #ContactsScreen:
+        #    id: contacts_screen
+        #    tab: contacts_tab
         CleanHeader:
-            id: history_tab
-            text: _('History')
+            id: invoices_tab
+            text: _('Invoices')
             slide: 0
         CleanHeader:
             id: send_tab
             text: _('Send')
             slide: 1
         CleanHeader:
-            id: receive_tab
-            text: _('Receive')
+            id: history_tab
+            text: _('History')
             slide: 2
         CleanHeader:
-            id: contacts_tab
-            text: _('Contacts')
+            id: receive_tab
+            text: _('Receive')
             slide: 3
+        CleanHeader:
+            id: requests_tab
+            text: _('Requests')
+            slide: 4
+        #CleanHeader:
+        #    id: contacts_tab
+        #    text: _('Contacts')
+        #    slide: 4
 
 <ActionOvrButton@ActionButton>
     on_release:
-        if self.parent: self.parent.parent.dismiss()
-        app.popup_dialog(self.name)
-
-
-<SettingsItem@ButtonBehavior+BoxLayout>
-    orientation: 'vertical'
-    title: ''
-    description: ''
-    size_hint: 1, 1
-    Label:
-        id: title
-        text: self.parent.title
-        size_hint: 1, 1
-        bold: True
-        text_size: self.size
-        halign: 'left'
-    Label:
-        text: self.parent.description
-        size_hint: 1, 1
-        text_size: self.width, None
-        color: 0.8, 0.8, 0.8, 1
-        halign: 'left'
+        Clock.schedule_once(lambda dt: self.parent.parent.dismiss() if self.parent else None, 0.05)
+        Clock.schedule_once(lambda dt: app.popup_dialog(self.name), 0.05)
 
 
 BoxLayout:
-
     orientation: 'vertical'
 
     canvas.before:
@@ -373,34 +394,26 @@ BoxLayout:
                     .format(app.status)
                 font_size: '22dp'
                 minimum_width: '1dp'
-
-            ActionButton:
-                id: context_button
-                text: app.context
-                width: 0
-                on_text:
-                    self.width = 20 if self.text else 0
-                on_release: app.context_action()
+                on_release: app.popup_dialog('status')
 
             ActionOverflow:
                 id: ao
                 ActionOvrButton:
-                    text: _('Network')
+                    name: 'about'
+                    text: _('About')
+                ActionOvrButton:
                     name: 'network'
+                    text: _('Network')
                     on_parent:
                         # when widget overflow drop down is shown, adjust the width
                         parent = args[1]
                         if parent: ao._dropdown.width = sp(200)
-                ActionOvrButton:
-                    name: 'settings'
-                    text: _('Settings')
                 ActionOvrButton:
                     name: 'wallets'
                     text: _('Wallets')
                 ActionOvrButton:
-                    name: 'plugins'
-                    text: _('Plugins')
-
+                    name: 'settings'
+                    text: _('Settings')
     ScreenManager:
         id: manager
         ScreenTabs:

gui/kivy/main_window.py

@@ -7,11 +7,13 @@ from decimal import Decimal
 
 import electrum
 from electrum import WalletStorage, Wallet
-from electrum.i18n import _, set_language
+from electrum.i18n import _
 from electrum.contacts import Contacts
+from electrum.paymentrequest import InvoiceStore
 from electrum.util import profiler, InvalidPassword
 from electrum.plugins import run_hook
 from electrum.util import format_satoshis, format_satoshis_plain
+from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_UNKNOWN, PR_EXPIRED
 
 from kivy.app import App
 from kivy.core.window import Window
@@ -31,6 +33,7 @@ Factory.register('InstallWizard',
 Factory.register('InfoBubble', module='electrum_gui.kivy.uix.dialogs')
 Factory.register('ELTextInput', module='electrum_gui.kivy.uix.screens')
 
+
 #from kivy.core.window import Window
 #Window.softinput_mode = 'below_target'
 
@@ -54,8 +57,8 @@ from kivy.core.clipboard import Clipboard
 Factory.register('TabbedCarousel', module='electrum_gui.kivy.uix.screens')
 
 
+from electrum.util import base_units
 
-base_units = {'BTC':8, 'mBTC':5, 'uBTC':2}
 
 class ElectrumWindow(App):
 
@@ -72,13 +75,6 @@ class ElectrumWindow(App):
             self.history_screen.update()
 
     base_unit = AliasProperty(_get_bu, _set_bu)
-
-    def _rotate_bu(self):
-        keys = sorted(base_units.keys())
-        self.base_unit = keys[ (keys.index(self.base_unit) + 1) % len(keys)]
-
-    context = StringProperty('')
-    context_action = lambda x: None
     status = StringProperty('')
     fiat_unit = StringProperty('')
 
@@ -165,6 +161,9 @@ class ElectrumWindow(App):
         self.nfcscanner = None
         self.tabs = None
 
+        self.receive_address = None
+        self.current_invoice = None
+
         super(ElectrumWindow, self).__init__(**kwargs)
 
         title = _('Electrum App')
@@ -176,6 +175,7 @@ class ElectrumWindow(App):
 
         #self.config = self.gui_object.config
         self.contacts = Contacts(self.electrum_config)
+        self.invoices = InvoiceStore(self.electrum_config)
 
         self.bind(url=self.set_URI)
         # were we sent a url?
@@ -191,15 +191,60 @@ class ElectrumWindow(App):
         self._trigger_notify_transactions = \
             Clock.create_trigger(self.notify_transactions, 5)
 
+    def get_receive_address(self):
+        return self.receive_address if self.receive_address else self.wallet.get_unused_address(None)
+
+    def do_pay(self, obj):
+        pr = self.invoices.get(obj.key)
+        self.on_pr(pr)
+
+    def on_pr(self, pr):
+        if pr.verify(self.contacts):
+            key = self.invoices.add(pr)
+            self.invoices_screen.update()
+            status = self.invoices.get_status(key)
+            if status == PR_PAID:
+                self.show_error("invoice already paid")
+                self.send_screen.do_clear()
+            else:
+                if pr.has_expired():
+                    self.show_error(_('Payment request has expired'))
+                else:
+                    self.current_invoice = pr
+                    self.update_tab('send')
+                    self.switch_to('send')
+        else:
+            self.show_error("invoice error:" + pr.error)
+            self.send_screen.do_clear()
+
     def set_URI(self, url):
         try:
-            url = electrum.util.parse_URI(url)
+            url = electrum.util.parse_URI(url, self.on_pr)
         except:
             self.show_info("Invalid URI", url)
             return
         self.send_screen.set_URI(url)
 
 
+    def update_tab(self, name):
+        s = getattr(self, name + '_screen', None)
+        if s:
+            s.update()
+
+    @profiler
+    def update_tabs(self):
+        for tab in ['invoices', 'send', 'history', 'receive', 'requests']:
+            self.update_tab(tab)
+
+    def switch_to(self, name):
+        tab = self.tabs.ids[name + '_tab']
+        self.tabs.ids.panel.switch_to(tab)
+
+    def show_request(self, addr):
+        self.receive_address = addr
+        self.update_tab('receive')
+        self.switch_to('receive')
+
     def scan_qr(self, on_complete):
         from jnius import autoclass
         from android import activity
@@ -212,31 +257,10 @@ class ElectrumWindow(App):
                 if resultCode == -1: # RESULT_OK:
                     contents = intent.getStringExtra("SCAN_RESULT")
                     if intent.getStringExtra("SCAN_RESULT_FORMAT") == 'QR_CODE':
-                        try:
-                            uri = electrum.util.parse_URI(contents)
-                        except:
-                            self.show_info("Invalid URI", url)
-                            return
-                        on_complete(uri)
+                        on_complete(contents)
         activity.bind(on_activity_result=on_qr_result)
         PythonActivity.mActivity.startActivityForResult(intent, 0)
 
-    def show_plugins(self, plugins_list):
-        def on_active(sw, value):
-            self.plugins.toggle_enabled(self.electrum_config, sw.name)
-            run_hook('init_kivy', self)
-        for item in self.plugins.descriptions:
-            if 'kivy' not in item.get('available_for', []):
-                continue
-            name = item.get('__name__')
-            label = Label(text=item.get('fullname'), height='48db', size_hint=(1, None))
-            plugins_list.add_widget(label)
-            sw = Switch()
-            sw.name = name
-            p = self.plugins.get(name)
-            sw.active = (p is not None) and p.is_enabled()
-            sw.bind(active=on_active)
-            plugins_list.add_widget(sw)
 
     def build(self):
         return Builder.load_file('gui/kivy/main.kv')
@@ -273,30 +297,46 @@ class ElectrumWindow(App):
             win.bind(keyboard_height=self.on_keyboard_height)
 
         self.on_size(win, win.size)
+        self.init_ui()
+        self.load_wallet_by_name(self.electrum_config.get_wallet_path())
+
+    def load_wallet_by_name(self, wallet_path):
+        if not wallet_path:
+            return
+        self.stop_wallet()
+
         config = self.electrum_config
-        storage = WalletStorage(config.get_wallet_path())
-
+        storage = WalletStorage(wallet_path)
         Logger.info('Electrum: Check for existing wallet')
-
         if storage.file_exists:
             wallet = Wallet(storage)
             action = wallet.get_action()
         else:
             action = 'new'
-
         if action is not None:
             # start installation wizard
             Logger.debug('Electrum: Wallet not found. Launching install wizard')
             wizard = Factory.InstallWizard(config, self.network, storage)
-            wizard.bind(on_wizard_complete=self.on_wizard_complete)
+            wizard.bind(on_wizard_complete=lambda instance, wallet: self.load_wallet(wallet))
             wizard.run(action)
         else:
             wallet.start_threads(self.network)
-            self.on_wizard_complete(None, wallet)
-
+            self.load_wallet(wallet)
         self.on_resume()
 
+    def create_wallet_dialog(self, l):
+        from uix.dialogs.label_dialog import LabelDialog
+        def f(text):
+            if text:
+                l.text = text
+        d = LabelDialog(_('Enter wallet name'), '', f)
+        d.open()
+
+
     def on_stop(self):
+        self.stop_wallet()
+
+    def stop_wallet(self):
         if self.wallet:
             self.wallet.stop_threads()
 
@@ -316,7 +356,6 @@ class ElectrumWindow(App):
                 active_widg = self.root.children[0]
             except IndexError:
                 return
-
         try:
             fw = self._focused_widget
         except AttributeError:
@@ -350,21 +389,18 @@ class ElectrumWindow(App):
             self.gui.main_gui.toggle_settings(self)
             return True
 
-    def on_wizard_complete(self, instance, wallet):
-        if not wallet:
-            Logger.debug('Electrum: No Wallet set/found. Exiting...')
-            app = App.get_running_app()
-            app.show_error('Electrum: No Wallet set/found. Exiting...',
-                           exit=True)
-
-        self.init_ui()
-        self.load_wallet(wallet)
-
     def popup_dialog(self, name):
-        popup = Builder.load_file('gui/kivy/uix/ui_screens/'+name+'.kv')
-        popup.open()
-
-
+        if name == 'settings':
+            from uix.dialogs.settings import SettingsDialog
+            d = SettingsDialog(self)
+            d.open()
+        elif name == 'wallets':
+            from uix.dialogs.wallets import WalletDialog
+            d = WalletDialog()
+            d.open()
+        else:
+            popup = Builder.load_file('gui/kivy/uix/ui_screens/'+name+'.kv')
+            popup.open()
 
     @profiler
     def init_ui(self):
@@ -372,7 +408,6 @@ class ElectrumWindow(App):
         tasks of setting up the ui.
         '''
         from weakref import ref
-        set_language(self.electrum_config.get('language'))
 
         self.funds_error = False
         # setup UX
@@ -401,7 +436,8 @@ class ElectrumWindow(App):
             interests = ['updated', 'status', 'new_transaction']
             self.network.register_callback(self.on_network, interests)
 
-        self.wallet = None
+        #self.wallet = None
+        self.tabs = self.root.ids['tabs']
 
     def on_network(self, event, *args):
         if event == 'updated':
@@ -418,7 +454,7 @@ class ElectrumWindow(App):
         self.update_wallet()
         # Once GUI has been initialized check if we want to announce something
         # since the callback has been called before the GUI was initialized
-        self.update_history_tab()
+        self.update_tabs()
         self.notify_transactions()
         run_hook('load_wallet', wallet, self)
 
@@ -447,58 +483,17 @@ class ElectrumWindow(App):
         amount, fee = self.wallet.get_max_amount(self.electrum_config, inputs, None)
         return format_satoshis_plain(amount, self.decimal_point())
 
-    def update_password(self, label, c):
-        text = label.password
-        if c == '<':
-            text = text[:-1]
-        elif c == 'Clear':
-            text = ''
-        else:
-            text += c
-        label.password = text
-
-    def toggle_fiat(self, a):
-        a.is_fiat = not a.is_fiat
-
-    def update_amount(self, label, c):
-        amount = label.fiat_amount if label.is_fiat else label.amount
-        if c == '<':
-            amount = amount[:-1]
-        elif c == '.' and amount == '':
-            amount = '0.'
-        elif c == '0' and amount == '0':
-            amount = '0'
-        else:
-            try:
-                Decimal(amount+c)
-                amount += c
-            except:
-                pass
-
-        if label.is_fiat:
-            label.fiat_amount = amount
-        else:
-            label.amount = amount
-
     def format_amount(self, x, is_diff=False, whitespaces=False):
         return format_satoshis(x, is_diff, 0, self.decimal_point(), whitespaces)
 
+    def format_amount_and_units(self, x):
+        return format_satoshis_plain(x, self.decimal_point()) + ' ' + self.base_unit
+
     @profiler
     def update_wallet(self, *dt):
         self._trigger_update_status()
-        if self.wallet.up_to_date or not self.network or not self.network.is_connected():
-            self.update_history_tab()
-            self.update_contacts_tab()
-
-
-    @profiler
-    def update_history_tab(self, see_all=False):
-        if self.history_screen:
-            self.history_screen.update(see_all)
-
-    def update_contacts_tab(self):
-        if self.contacts_screen:
-            self.contacts_screen.update()
+        #if self.wallet.up_to_date or not self.network or not self.network.is_connected():
+        self.update_tabs()
 
 
     @profiler
@@ -593,64 +588,10 @@ class ElectrumWindow(App):
         else:
             self.show_error(_('Invalid Address'))
 
-    def send_payment(self, address, amount=0, label='', message=''):
-        tabs = self.tabs
-        screen_send = tabs.ids.screen_send
-
-        if label and self.wallet.labels.get(address) != label:
-            #if self.question('Give label "%s" to address %s ?'%(label,address)):
-            if address not in self.wallet.addressbook and not self.wallet.  is_mine(address):
-                self.wallet.addressbook.append(address)
-            self.wallet.set_label(address, label)
-
-        # switch_to the send screen
-        tabs.ids.panel.switch_to(tabs.ids.tab_send)
-
-        label = self.wallet.labels.get(address)
-        m_addr = label + '  <'+ address +'>' if label else address
-
-        # populate
-        def set_address(*l):
-            content = screen_send.ids
-            content.payto_e.text = m_addr
-            content.message_e.text = message
-            if amount:
-                content.amount_e.text = amount
-
-        # wait for screen to load
-        Clock.schedule_once(set_address, .5)
 
     def set_send(self, address, amount, label, message):
         self.send_payment(address, amount=amount, label=label, message=message)
 
-    def prepare_for_payment_request(self):
-        tabs = self.tabs
-        screen_send = tabs.ids.screen_send
-
-        # switch_to the send screen
-        tabs.ids.panel.switch_to(tabs.ids.tab_send)
-
-        content = screen_send.ids
-        if content:
-            self.set_frozen(content, False)
-        screen_send.screen_label.text = _("please wait...")
-        return True
-
-    def payment_request_ok(self):
-        tabs = self.tabs
-        screen_send = tabs.ids.screen_send
-
-        # switch_to the send screen
-        tabs.ids.panel.switch_to(tabs.ids.tab_send)
-
-        self.set_frozen(content, True)
-
-        screen_send.ids.payto_e.text = self.gui_object.payment_request.domain
-        screen_send.ids.amount_e.text = self.format_amount(self.gui_object.payment_request.get_amount())
-        screen_send.ids.message_e.text = self.gui_object.payment_request.memo
-
-        # wait for screen to load
-        Clock.schedule_once(set_address, .5)
 
     def set_frozen(self, entry, frozen):
         if frozen:
@@ -660,15 +601,6 @@ class ElectrumWindow(App):
             entry.disabled = False
             Factory.Animation(opacity=1).start(content)
 
-    def payment_request_error(self):
-        tabs = self.tabs
-        screen_send = tabs.ids.screen_send
-
-        # switch_to the send screen
-        tabs.ids.panel.switch_to(tabs.ids.tab_send)
-
-        self.do_clear()
-        self.show_info(self.gui_object.payment_request.error)
 
     def show_error(self, error, width='200dp', pos=None, arrow_pos=None,
         exit=False, icon='atlas://gui/kivy/theming/light/error', duration=0,
@@ -737,43 +669,32 @@ class ElectrumWindow(App):
             pos = (win.center[0], win.center[1] - (info_bubble.height/2))
         info_bubble.show(pos, duration, width, modal=modal, exit=exit)
 
-    def tx_dialog(self, tx_hash):
+    def tx_details_dialog(self, obj):
         popup = Builder.load_file('gui/kivy/uix/ui_screens/transaction.kv')
-        popup.tx_hash = tx_hash
+        popup.tx_hash = obj.tx_hash
         popup.open()
 
-    def tx_selected(self, txid, state):
-        if state == 'down':
-            self.context = 'tx'
-            self.context_action = lambda: self.tx_dialog(txid)
-        else:
-            self.reset_context()
+    def address_dialog(self, screen):
+        pass
 
-    def reset_context(self):
-        self.context = ''
-        self.context_action = lambda: None
+    def description_dialog(self, screen):
+        from uix.dialogs.label_dialog import LabelDialog
+        text = screen.message
+        def callback(text):
+            screen.message = text
+        d = LabelDialog(_('Enter description'), text, callback)
+        d.open()
 
+    @profiler
     def amount_dialog(self, screen, show_max):
-        popup = Builder.load_file('gui/kivy/uix/ui_screens/amount.kv')
-        but_max = popup.ids.but_max
-        if not show_max:
-            but_max.disabled = True
-            but_max.opacity = 0
-        else:
-            but_max.disabled = False
-            but_max.opacity = 1
-
+        from uix.dialogs.amount_dialog import AmountDialog
         amount = screen.amount
         if amount:
-            a, u = str(amount).split()
+            amount, u = str(amount).split()
             assert u == self.base_unit
-            popup.ids.kb.amount = a
-
-        def cb():
-            o = popup.ids.a.btc_text
-            screen.amount = o
-
-        popup.on_dismiss = cb
+        def cb(amount):
+            screen.amount = amount
+        popup = AmountDialog(show_max, amount, cb)
         popup.open()
 
     def protected(self, f, args):
@@ -804,12 +725,9 @@ class ElectrumWindow(App):
             self.show_error("PIN numbers do not match")
 
     def password_dialog(self, title, f, args):
-        popup = Builder.load_file('gui/kivy/uix/ui_screens/password.kv')
-        popup.title = title
-        def callback():
-            pw = popup.ids.kb.password
+        from uix.dialogs.password_dialog import PasswordDialog
+        def callback(pw):
             Clock.schedule_once(lambda x: apply(f, args + (pw,)), 0.1)
-        popup.on_dismiss = callback
+        popup = PasswordDialog(title, callback)
         popup.open()
 
-

gui/kivy/uix/context_menu.py

@@ -0,0 +1,52 @@
+#!python
+#!/usr/bin/env python
+from kivy.app import App
+from kivy.uix.bubble import Bubble
+from kivy.animation import Animation
+from kivy.uix.floatlayout import FloatLayout
+from kivy.lang import Builder
+from kivy.factory import Factory
+from kivy.clock import Clock
+
+Builder.load_string('''
+<MenuItem@Button>
+    background_color: .2, .9, 1, 1
+    height: '48dp'
+    size_hint: 1, None
+
+<ContextMenu>
+    size_hint: 1, None
+    height: '48dp'
+    pos: (0, 0)
+    show_arrow: False
+    arrow_pos: 'top_mid'
+    padding: 0
+    orientation: 'horizontal'
+    BoxLayout:
+        size_hint: 1, 1
+        height: '48dp'
+        orientation: 'horizontal'
+        id: buttons
+''')
+
+
+class MenuItem(Factory.Button):
+    pass
+
+class ContextMenu(Bubble):
+
+    def __init__(self, obj, action_list):
+        Bubble.__init__(self)
+        self.obj = obj
+        for k, v in action_list:
+            l = MenuItem()
+            l.text = k
+            def func(f=v):
+                Clock.schedule_once(lambda dt: self.hide(), 0.1)
+                Clock.schedule_once(lambda dt: f(obj), 0.15)
+            l.on_release = func
+            self.ids.buttons.add_widget(l)
+
+    def hide(self):
+        if self.parent:
+            self.parent.hide_menu()

gui/kivy/uix/dialogs/__init__.py

@@ -144,6 +144,7 @@ class InfoBubble(Factory.Bubble):
             m.add_widget(self)
         else:
             Window.add_widget(self)
+
         # wait for the bubble to adjust it's size according to text then animate
         Clock.schedule_once(lambda dt: self._show(pos, duration))
 

gui/kivy/uix/dialogs/amount_dialog.py

@@ -1,13 +1,16 @@
-#:import Decimal decimal.Decimal
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+from decimal import Decimal
 
+Builder.load_string('''
 
-Popup:
+<AmountDialog@Popup>
     id: popup
     title: _('Amount')
-
     AnchorLayout:
         anchor_x: 'center'
-
         BoxLayout:
             orientation: 'vertical'
             size_hint: 0.8, 1
@@ -18,7 +21,7 @@ Popup:
                     id: a
                     btc_text: (kb.amount + ' ' + app.base_unit) if kb.amount else ''
                     fiat_text: (kb.fiat_amount + ' ' + app.fiat_unit) if kb.fiat_amount else ''
-                    text: (self.fiat_text + ' / ' + self.btc_text if kb.is_fiat else self.btc_text + ' / ' + self.fiat_text) if self.btc_text else ''
+                    text: ((self.fiat_text + ' / ' + self.btc_text if kb.is_fiat else self.btc_text + ' / ' + self.fiat_text) if app.fiat_unit else self.btc_text) if self.btc_text else ''
                     size_hint: 1, 1
                     font_size: '22dp'
             Widget:
@@ -30,8 +33,8 @@ Popup:
                 is_fiat: False
                 on_fiat_amount: if self.is_fiat: self.amount = app.fiat_to_btc(self.fiat_amount)
                 on_amount: if not self.is_fiat: self.fiat_amount = app.btc_to_fiat(self.amount)
-                update_text: app.update_amount
                 size_hint: 1, None
+                update_amount: popup.update_amount
                 height: '300dp'
                 cols: 3
                 KButton:
@@ -60,6 +63,8 @@ Popup:
                     text: '<'
                 Button:
                     id: but_max
+                    opacity: 1 if root.show_max else 0
+                    disabled: not root.show_max
                     size_hint: 1, None
                     height: '48dp'
                     text: 'Max'
@@ -70,9 +75,9 @@ Popup:
                     id: button_fiat
                     size_hint: 1, None
                     height: '48dp'
-                    text: app.fiat_unit if kb.is_fiat else app.base_unit
+                    text: (app.fiat_unit if kb.is_fiat else app.base_unit) if app.fiat_unit else ''
                     on_release:
-                        app.toggle_fiat(kb)
+                        popup.toggle_fiat(kb)
                 Button:
                     size_hint: 1, None
                     height: '48dp'
@@ -80,18 +85,53 @@ Popup:
                     on_release:
                         kb.amount = ''
                         kb.fiat_amount = ''
-
             Widget:
                 size_hint: 1, None
-
             BoxLayout:
                 size_hint: 1, None
                 height: '48dp'
                 Widget:
-                    size_hint: 2, None
+                    size_hint: 1, None
                     height: '48dp'
                 Button:
                     size_hint: 1, None
                     height: '48dp'
                     text: _('OK')
-                    on_release: popup.dismiss()
+                    on_release:
+                        root.callback(a.btc_text)
+                        popup.dismiss()
+''')
+
+from kivy.properties import BooleanProperty
+
+class AmountDialog(Factory.Popup):
+    show_max = BooleanProperty(False)
+    def __init__(self, show_max, amount, cb):
+        Factory.Popup.__init__(self)
+        self.show_max = show_max
+        self.callback = cb
+        if amount:
+            self.ids.kb.amount = amount
+
+    def toggle_fiat(self, a):
+        a.is_fiat = not a.is_fiat
+
+    def update_amount(self, c):
+        kb = self.ids.kb
+        amount = kb.fiat_amount if kb.is_fiat else kb.amount
+        if c == '<':
+            amount = amount[:-1]
+        elif c == '.' and amount in ['0', '']:
+            amount = '0.'
+        elif amount == '0':
+            amount = c
+        else:
+            try:
+                Decimal(amount+c)
+                amount += c
+            except:
+                pass
+        if kb.is_fiat:
+            kb.fiat_amount = amount
+        else:
+            kb.amount = amount

gui/kivy/uix/dialogs/choice_dialog.py

@@ -0,0 +1,65 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+from kivy.uix.checkbox import CheckBox
+from kivy.uix.label import Label
+from kivy.uix.widget import Widget
+
+Builder.load_string('''
+<ChoiceDialog@Popup>
+    id: popup
+    title: ''
+    size_hint: 0.8, 0.8
+    pos_hint: {'top':0.9}
+    BoxLayout:
+        orientation: 'vertical'
+        Widget:
+            size_hint: 1, 0.1
+        ScrollView:
+            orientation: 'vertical'
+            size_hint: 1, 0.8
+            GridLayout:
+                row_default_height: '48dp'
+                orientation: 'vertical'
+                id: choices
+                cols: 2
+                size_hint: 1, 1
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.2
+            Button:
+                text: 'Cancel'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release: popup.dismiss()
+            Button:
+                text: 'OK'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release:
+                    root.callback(popup.value)
+                    popup.dismiss()
+''')
+
+class ChoiceDialog(Factory.Popup):
+
+    def __init__(self, title, choices, key, callback):
+        Factory.Popup.__init__(self)
+        for k, v in choices.items():
+            l = Label(text=v)
+            l.height = '48dp'
+            cb = CheckBox(group='choices')
+            cb.value = k
+            cb.height = '48dp'
+            def f(cb, x):
+                if x: self.value = cb.value
+            cb.bind(active=f)
+            if k == key:
+                cb.active = True
+            self.ids.choices.add_widget(l)
+            self.ids.choices.add_widget(cb)
+        self.ids.choices.add_widget(Widget(size_hint_y=1))
+        self.callback = callback
+        self.title = title
+        self.value = key

gui/kivy/uix/dialogs/create_restore.py

@@ -43,7 +43,6 @@ Builder.load_string('''
     on_release: if self.root: self.root.dispatch('on_release', self)
 
 
-
 <-CreateAccountDialog>
     text_color: .854, .925, .984, 1
     auto_dismiss: False
@@ -140,11 +139,11 @@ Builder.load_string('''
         height: self.minimum_height
         CreateAccountButton:
             id: create
-            text: _('Create a Wallet')
+            text: _('Create a new seed')
             root: root
         CreateAccountButton:
             id: restore
-            text: _('I already have a wallet')
+            text: _('I already have a seed')
             root: root
 
 
@@ -457,8 +456,7 @@ class RestoreSeedDialog(CreateAccountDialog):
         self._trigger_check_seed = Clock.create_trigger(self.check_seed)
 
     def check_seed(self, dt):
-        self.ids.next.disabled = not bool(self._wizard.is_any(
-                                                    self.ids.text_input_seed))
+        self.ids.next.disabled = not bool(self._wizard.is_any(self.ids.text_input_seed))
 
     def on_parent(self, instance, value):
         if value:

gui/kivy/uix/dialogs/installwizard.py

@@ -73,7 +73,9 @@ class InstallWizard(Widget):
     def is_any(self, seed_e):
         text = self.get_seed_text(seed_e)
         return (Wallet.is_seed(text) or
-                Wallet.is_mpk(text) or
+                Wallet.is_old_mpk(text) or
+                Wallet.is_xpub(text) or
+                Wallet.is_xprv(text) or
                 Wallet.is_address(text) or
                 Wallet.is_private_key(text))
 
@@ -129,8 +131,8 @@ class InstallWizard(Widget):
         if Wallet.is_seed(seed):
             return self.password_dialog(wallet=wallet, mode='restore',
                                         seed=seed)
-        elif Wallet.is_mpk(seed):
-            wallet = Wallet.from_mpk(seed, self.storage)
+        elif Wallet.is_xpub(seed):
+            wallet = Wallet.from_xpub(seed, self.storage)
         elif Wallet.is_address(seed):
             wallet = Wallet.from_address(seed, self.storage)
         elif Wallet.is_private_key(seed):
@@ -257,18 +259,19 @@ class InstallWizard(Widget):
                 new_password = None
 
             if mode == 'restore':
-                wallet = Wallet.from_seed(seed, self.storage)
-                password = (unicode(ti_password.text)
-                            if wallet and wallet.use_encryption else
-                            None)
+                password = unicode(ti_password.text)
+                           # if wallet and wallet.use_encryption else
+                           # None)
+                if not password:
+                    password = None
+                wallet = Wallet.from_text(seed, password, self.storage)
 
                 def on_complete(*l):
-                    wallet.create_accounts(new_password)
                     self.load_network(wallet, mode='restore')
                     _dlg.close()
 
-                self.waiting_dialog(lambda: wallet.add_seed(seed, new_password),
-                                    msg=_("saving seed"),
+                self.waiting_dialog(wallet.synchronize,
+                                    msg=_("generating addresses"),
                                     on_complete=on_complete)
                 return
 

gui/kivy/uix/dialogs/label_dialog.py

@@ -0,0 +1,55 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+
+Builder.load_string('''
+<LabelDialog@Popup>
+    id: popup
+    title: ''
+    size_hint: 0.8, 0.3
+    pos_hint: {'top':0.9}
+    BoxLayout:
+        orientation: 'vertical'
+        Widget:
+            size_hint: 1, 0.2
+        TextInput:
+            id:input
+            padding: '5dp'
+            size_hint: 1, None
+            height: '27dp'
+            pos_hint: {'center_y':.5}
+            text:''
+            multiline: False
+            background_normal: 'atlas://gui/kivy/theming/light/tab_btn'
+            background_active: 'atlas://gui/kivy/theming/light/textinput_active'
+            hint_text_color: self.foreground_color
+            foreground_color: 1, 1, 1, 1
+            font_size: '16dp'
+            focus: True
+        Widget:
+            size_hint: 1, 0.2
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint: 1, 0.5
+            Button:
+                text: 'Cancel'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release: popup.dismiss()
+            Button:
+                text: 'OK'
+                size_hint: 0.5, None
+                height: '48dp'
+                on_release:
+                    root.callback(input.text)
+                    popup.dismiss()
+''')
+
+class LabelDialog(Factory.Popup):
+
+    def __init__(self, title, text, callback):
+        Factory.Popup.__init__(self)
+        self.ids.input.text = text
+        self.callback = callback
+        self.title = title

gui/kivy/uix/dialogs/password_dialog.py

@@ -1,4 +1,12 @@
-Popup:
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+from decimal import Decimal
+
+Builder.load_string('''
+
+<PasswordDialog@Popup>
     id: popup
     title: _('Enter PIN Code')
     size_hint: 0.9, 0.9
@@ -16,9 +24,9 @@ Popup:
 
         GridLayout:
             id: kb
-            update_text: app.update_password
+            update_amount: popup.update_password
             password: ''
-            on_password: if len(self.password) == 6: popup.dismiss()
+            on_password: popup.on_password(self.password)
             size_hint: 1, None
             height: '300dp'
             cols: 3
@@ -49,3 +57,28 @@ Popup:
 
         Widget:
             size_hint: 1, 1
+''')
+
+
+class PasswordDialog(Factory.Popup):
+
+    def __init__(self, title, cb):
+        Factory.Popup.__init__(self)
+        self.title = title
+        self.callback = cb
+
+    def update_password(self, c):
+        kb = self.ids.kb
+        text = kb.password
+        if c == '<':
+            text = text[:-1]
+        elif c == 'Clear':
+            text = ''
+        else:
+            text += c
+        kb.password = text
+
+    def on_password(self, pw):
+        if len(pw) == 6:
+            self.dismiss()
+            self.callback(pw)

gui/kivy/uix/dialogs/settings.py

@@ -0,0 +1,171 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+
+from electrum.i18n import _
+from electrum.util import base_units
+from electrum.i18n import languages, set_language
+
+Builder.load_string('''
+<SettingsItem@ButtonBehavior+BoxLayout>
+    orientation: 'vertical'
+    title: ''
+    description: ''
+    size_hint: 1, 1
+    Label:
+        id: title
+        text: self.parent.title
+        size_hint: 1, 1
+        bold: True
+        text_size: self.size
+        halign: 'left'
+    Label:
+        text: self.parent.description
+        size_hint: 1, 1
+        text_size: self.width, None
+        color: 0.8, 0.8, 0.8, 1
+        halign: 'left'
+
+<PluginItem@ButtonBehavior+BoxLayout>
+    orientation: 'vertical'
+    title: ''
+    description: ''
+    size_hint: 1, 1
+    BoxLayout:
+        orientation: 'horizontal'
+        Label:
+            id: title
+            text: self.parent.title
+            size_hint: 1, 1
+            bold: True
+            text_size: self.size
+            halign: 'left'
+        Switch:
+            id: sw
+            name: ''
+    Label:
+        text: self.parent.description
+        size_hint: 1, 1
+        text_size: self.width, None
+        color: 0.8, 0.8, 0.8, 1
+        halign: 'left'
+
+<SettingsDialog@Popup>
+    id: settings
+    title: _('Settings')
+    BoxLayout:
+        orientation: 'vertical'
+        SettingsItem:
+            lang: settings.get_language_name()
+            title: _('Language') + ': %s'%self.lang
+            description: _("Language")
+            on_release:
+                settings.language_dialog(self)
+        CardSeparator
+        SettingsItem:
+            title: _('PIN Code') + ': %s'%('ON' if app.wallet.use_encryption else 'OFF')
+            description: _("Your PIN code will be required in order to spend bitcoins.")
+            on_release:
+                app.change_password()
+                self.title = _('PIN Code') + ' (%s)'%('ON' if app.wallet.use_encryption else 'OFF')
+        CardSeparator
+        SettingsItem:
+            bu: app.base_unit
+            title: _('Denomination') + ': ' + self.bu
+            description: _("Base unit for Bitcoin amounts.")
+            on_release:
+                settings.unit_dialog(self)
+        CardSeparator
+        SettingsItem:
+            title: _('Fiat Currency') + ': ' + app.fiat_unit
+            description: "Select the local fiat currency."
+            on_release:
+                settings.fiat_dialog(self)
+        CardSeparator
+        SettingsItem:
+            title: _('OpenAlias')
+            description: "Email-like address."
+            on_release:
+                settings.openalias_dialog()
+        Widget:
+            size_hint: 1, 1
+        BoxLayout:
+            Widget:
+                size_hint: 0.5, None
+            Button:
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('OK')
+                on_release:
+                    settings.dismiss()
+''')
+
+class SettingsDialog(Factory.Popup):
+
+    def __init__(self, app):
+        self.app = app
+        Factory.Popup.__init__(self)
+
+    def get_language_name(self):
+        return languages.get(self.app.electrum_config.get('language', 'en_UK'), '')
+
+    def language_dialog(self, item):
+        from choice_dialog import ChoiceDialog
+        l = self.app.electrum_config.get('language', 'en_UK')
+        def cb(key):
+            self.app.electrum_config.set_key("language", key, True)
+            item.lang = self.get_language_name()
+            set_language(key)
+        d = ChoiceDialog(_('Language'), languages, l, cb)
+        d.open()
+
+    def unit_dialog(self, item):
+        from choice_dialog import ChoiceDialog
+        def cb(text):
+            self.app._set_bu(text)
+            item.bu = self.app.base_unit
+        d = ChoiceDialog(_('Denomination'), dict(map(lambda x: (x,x), base_units)), self.app.base_unit, cb)
+        d.open()
+
+    def fiat_dialog(self, item):
+        from choice_dialog import ChoiceDialog
+        def cb(text):
+            pass
+        d = ChoiceDialog(_('Fiat Currency'), {}, '', cb)
+        d.open()
+
+    def openalias_dialog(self):
+        from label_dialog import LabelDialog
+        def callback(text):
+            pass
+        d = LabelDialog(_('OpenAlias'), '', callback)
+        d.open()
+
+
+    def show_plugins(self, plugins_list):
+
+        def on_active(sw, value):
+            self.plugins.toggle_enabled(self.electrum_config, sw.name)
+            run_hook('init_kivy', self)
+
+        for item in self.plugins.descriptions:
+            if 'kivy' not in item.get('available_for', []):
+                continue
+            name = item.get('__name__')
+            label = Label(text=item.get('fullname'), height='48db', size_hint=(1, None))
+            plugins_list.add_widget(label)
+            sw = Switch()
+            sw.name = name
+            p = self.plugins.get(name)
+            sw.active = (p is not None) and p.is_enabled()
+            sw.bind(active=on_active)
+            plugins_list.add_widget(sw)
+
+class PluginItem():
+    def __init__(self, name):
+        p = self.plugins.get(name)
+        sw.active = (p is not None) and p.is_enabled()
+        sw.bind(active=on_active)
+        plugins_list.add_widget(sw)
+        

gui/kivy/uix/dialogs/wallets.py

@@ -0,0 +1,79 @@
+from kivy.app import App
+from kivy.factory import Factory
+from kivy.properties import ObjectProperty
+from kivy.lang import Builder
+
+from electrum.i18n import _
+from electrum.util import base_units
+
+import os
+from label_dialog import LabelDialog
+
+Builder.load_string('''
+#:import os os
+<WalletDialog@Popup>:
+    title: _('Wallets')
+    id: popup
+    path: app.wallet.storage.path
+    on_path:
+        button.text = _('Open') if os.path.exists(popup.path) else _('Create')
+    BoxLayout:
+        orientation: 'vertical'
+        BoxLayout:
+            height: '48dp'
+            size_hint_y: None
+            orientation: 'horizontal'
+            Label:
+                text: _('Wallet') + ': '
+                height: '48dp'
+                size_hint_y: None
+            Button:
+                id: wallet_name
+                height: '48dp'
+                size_hint_y: None
+                text: os.path.basename(app.wallet.storage.path)
+                on_release:
+                    root.name_dialog()
+                on_text:
+                    popup.path = os.path.join(wallet_selector.path, self.text)
+        Widget
+            size_hint_y: None
+        FileChooserListView:
+            id: wallet_selector
+            dirselect: False
+            filter_dirs: True
+            filter: '*.*'
+            path: os.path.dirname(app.wallet.storage.path)
+            on_selection:
+                wallet_name.text = os.path.basename(self.selection[0]) if self.selection else ''
+            size_hint_y: 0.4
+        Widget
+            size_hint_y: 0.1
+
+        GridLayout:
+            cols: 2
+            size_hint_y: None
+            Button:
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('Cancel')
+                on_release:
+                    popup.dismiss()
+            Button:
+                id: button
+                size_hint: 0.5, None
+                height: '48dp'
+                text: _('Open') if os.path.exists(popup.path) else _('Create')
+                on_release:
+                    popup.dismiss()
+                    app.load_wallet_by_name(popup.path)
+''')
+
+class WalletDialog(Factory.Popup):
+    def name_dialog(self):
+        def cb(text):
+            if text:
+                self.ids.wallet_name.text = text
+        d = LabelDialog(_('Enter wallet name'), '', cb)
+        d.open()
+

gui/kivy/uix/qrcodewidget.py

@@ -42,14 +42,9 @@ Builder.load_string('''
 class QRCodeWidget(FloatLayout):
 
     data = StringProperty(None, allow_none=True)
-
     background_color = ListProperty((1, 1, 1, 1))
-
     foreground_color = ListProperty((0, 0, 0, 0))
 
-
-    #loading_image = StringProperty('gui/kivy/theming/loading.gif')
-
     def __init__(self, **kwargs):
         super(QRCodeWidget, self).__init__(**kwargs)
         self.data = None
@@ -57,21 +52,11 @@ class QRCodeWidget(FloatLayout):
         self._qrtexture = None
 
     def on_data(self, instance, value):
-        print "on data", value
         if not (self.canvas or value):
             return
-        img = self.ids.get('qrimage', None)
-
-        if not img:
-            # if texture hasn't yet been created delay the texture updation
-            Clock.schedule_once(lambda dt: self.on_data(instance, value))
-            return
-
-        #Thread(target=partial(self.update_qr, )).start()
         self.update_qr()
 
     def set_data(self, data):
-        print "set data", data
         if self.data == data:
             return
         MinSize = 210 if len(data) < 128 else 500
@@ -98,7 +83,7 @@ class QRCodeWidget(FloatLayout):
         # currently unused, do we need this?
         self._texture_size = size
 
-    def _create_texture(self, k, dt):
+    def _create_texture(self, k):
         self._qrtexture = texture = Texture.create(size=(k,k), colorfmt='rgb')
         # don't interpolate texture
         texture.min_filter = 'nearest'
@@ -107,32 +92,24 @@ class QRCodeWidget(FloatLayout):
     def update_texture(self):
         if not self.qr:
             return
-
         matrix = self.qr.get_matrix()
         k = len(matrix)
-        # create the texture in main UI thread otherwise
-        # this will lead to memory corruption
-        Clock.schedule_once(partial(self._create_texture, k), -1)
+        # create the texture
+        self._create_texture(k)
         buff = []
         bext = buff.extend
         cr, cg, cb, ca = self.background_color[:]
         cr, cg, cb = cr*255, cg*255, cb*255
-
         for r in range(k):
             for c in range(k):
-                bext([0, 0, 0] if matrix[r][c] else [cr, cg, cb])
-
+                bext([0, 0, 0] if matrix[k-1-r][c] else [cr, cg, cb])
         # then blit the buffer
         buff = ''.join(map(chr, buff))
-        # update texture in UI thread.
-        Clock.schedule_once(lambda dt: self._upd_texture(buff), .1)
+        # update texture
+        self._upd_texture(buff)
 
     def _upd_texture(self, buff):
         texture = self._qrtexture
-        if not texture:
-            # if texture hasn't yet been created delay the texture updation
-            Clock.schedule_once(lambda dt: self._upd_texture(buff), .1)
-            return
         texture.blit_buffer(buff, colorfmt='rgb', bufferfmt='ubyte')
         img =self.ids.qrimage
         img.anim_delay = -1

gui/kivy/uix/screens.py

@@ -17,17 +17,24 @@ from kivy.lang import Builder
 from kivy.factory import Factory
 
 from electrum.i18n import _
-from electrum.util import profiler, parse_URI
+from electrum.util import profiler, parse_URI, format_time
 from electrum import bitcoin
 from electrum.util import timestamp_to_datetime
 from electrum.plugins import run_hook
 
+from context_menu import ContextMenu
+
+from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_UNKNOWN, PR_EXPIRED
+
+
 class CScreen(Factory.Screen):
 
     __events__ = ('on_activate', 'on_deactivate', 'on_enter', 'on_leave')
     action_view = ObjectProperty(None)
     loaded = False
     kvname = None
+    context_menu = None
+    menu_actions = []
     app = App.get_running_app()
 
     def _change_action_view(self):
@@ -65,8 +72,17 @@ class CScreen(Factory.Screen):
         self.dispatch('on_deactivate')
 
     def on_deactivate(self):
-        pass
-        #Clock.schedule_once(lambda dt: self._change_action_view())
+        self.hide_menu()
+
+    def hide_menu(self):
+        if self.context_menu is not None:
+            self.remove_widget(self.context_menu)
+            self.context_menu = None
+
+    def show_menu(self, obj):
+        self.hide_menu()
+        self.context_menu = ContextMenu(obj, self.menu_actions)
+        self.add_widget(self.context_menu)
 
 
 class HistoryScreen(CScreen):
@@ -77,10 +93,18 @@ class HistoryScreen(CScreen):
     def __init__(self, **kwargs):
         self.ra_dialog = None
         super(HistoryScreen, self).__init__(**kwargs)
+        self.menu_actions = [ (_('Label'), self.label_dialog), (_('Details'), self.app.tx_details_dialog)]
+
+    def label_dialog(self, obj):
+        from dialogs.label_dialog import LabelDialog
+        key = obj.tx_hash
+        text = self.app.wallet.get_label(key)
+        def callback(text):
+            self.app.wallet.set_label(key, text)
+            self.update()
+        d = LabelDialog(_('Enter Transaction Label'), text, callback)
+        d.open()
 
-    def get_history_rate(self, btc_balance, timestamp):
-        date = timestamp_to_datetime(timestamp)
-        return run_hook('historical_value_str', btc_balance, date)
 
     def parse_history(self, items):
         for item in items:
@@ -98,49 +122,43 @@ class HistoryScreen(CScreen):
                 time_str = _('pending')
                 icon = "atlas://gui/kivy/theming/light/unconfirmed"
             elif conf < 6:
-                time_str = ''  # add new to fix error when conf < 0
                 conf = max(1, conf)
                 icon = "atlas://gui/kivy/theming/light/clock{}".format(conf)
             else:
                 icon = "atlas://gui/kivy/theming/light/confirmed"
 
-            if tx_hash:
-                label, is_default_label = self.app.wallet.get_label(tx_hash)
+            label = self.app.wallet.get_label(tx_hash) if tx_hash else _('Pruned transaction outputs')
+            date = timestamp_to_datetime(timestamp)
+            rate = run_hook('history_rate', date)
+            if self.app.fiat_unit:
+                quote_text = "..." if rate is None else "{0:.3} {1}".format(Decimal(value) / 100000000 * Decimal(rate), self.app.fiat_unit)
             else:
-                label = _('Pruned transaction outputs')
-                is_default_label = False
-
-            quote_currency = 'USD'
-            rate = self.get_history_rate(value, timestamp)
-            quote_text = "..." if rate is None else "{0:.3} {1}".format(rate, quote_currency)
-
+                quote_text = ''
             yield (conf, icon, time_str, label, value, tx_hash, quote_text)
 
     def update(self, see_all=False):
         if self.app.wallet is None:
             return
 
-        history_card = self.screen.ids.recent_activity_card
+        history_card = self.screen.ids.history_container
         history = self.parse_history(reversed(
             self.app.wallet.get_history(self.app.current_account)))
         # repopulate History Card
-        last_widget = history_card.ids.content.children[-1]
-        history_card.ids.content.clear_widgets()
-        history_add = history_card.ids.content.add_widget
-        history_add(last_widget)
-        RecentActivityItem = Factory.RecentActivityItem
+        history_card.clear_widgets()
+        history_add = history_card.add_widget
         count = 0
         for item in history:
             count += 1
-            conf, icon, date_time, address, value, tx, quote_text = item
-            ri = RecentActivityItem()
+            conf, icon, date_time, message, value, tx, quote_text = item
+            ri = Factory.HistoryItem()
             ri.icon = icon
             ri.date = date_time
-            ri.address = address
+            ri.message = message
             ri.value = value
             ri.quote_text = quote_text
             ri.confirmations = conf
             ri.tx_hash = tx
+            ri.screen = self
             history_add(ri)
             if count == 8 and not see_all:
                 break
@@ -181,20 +199,35 @@ class ScreenPassword(Factory.Screen):
 class SendScreen(CScreen):
 
     kvname = 'send'
+    payment_request = None
 
     def set_URI(self, uri):
-        print "set uri", uri
         self.screen.address = uri.get('address', '')
         self.screen.message = uri.get('message', '')
         amount = uri.get('amount')
         if amount:
-            amount_str = str( Decimal(amount) / pow(10, self.app.decimal_point()))
-            self.screen.amount = amount_str + ' ' + self.app.base_unit
+            self.screen.amount = self.app.format_amount_and_units(amount)
+
+    def update(self):
+        if self.app.current_invoice:
+            self.set_request(self.app.current_invoice)
 
     def do_clear(self):
         self.screen.amount = ''
         self.screen.message = ''
         self.screen.address = ''
+        self.payment_request = None
+
+    def amount_dialog(self):
+        Clock.schedule_once(lambda dt: self.app.amount_dialog(self, True), .25)
+
+    def set_request(self, pr):
+        self.payment_request = pr
+        self.screen.address = pr.get_requestor()
+        amount = pr.get_amount()
+        if amount:
+            self.screen.amount = self.app.format_amount_and_units(amount)
+        self.screen.message = pr.get_memo()
 
     def do_paste(self):
         contents = unicode(self.app._clipboard.get())
@@ -206,18 +239,24 @@ class SendScreen(CScreen):
         self.set_URI(uri)
 
     def do_send(self):
-        address = str(self.screen.address)
-        if not bitcoin.is_address(address):
-            self.app.show_error(_('Invalid Bitcoin Address') + ':\n' + address)
-            return
-        try:
-            amount = self.app.get_amount(self.screen.amount)
-        except:
-            self.app.show_error(_('Invalid amount') + ':\n' + self.screen.amount)
-            return
+        if self.payment_request:
+            if self.payment_request.has_expired():
+                self.app.show_error(_('Payment request has expired'))
+                return
+            outputs = self.payment_request.get_outputs()
+        else:
+            address = str(self.screen.address)
+            if not bitcoin.is_address(address):
+                self.app.show_error(_('Invalid Bitcoin Address') + ':\n' + address)
+                return
+            try:
+                amount = self.app.get_amount(self.screen.amount)
+            except:
+                self.app.show_error(_('Invalid amount') + ':\n' + self.screen.amount)
+                return
+            outputs = [('address', address, amount)]
         message = unicode(self.screen.message)
         fee = None
-        outputs = [('address', address, amount)]
         self.app.protected(self.send_tx, (outputs, fee, message))
 
     def send_tx(self, *args):
@@ -250,7 +289,14 @@ class ReceiveScreen(CScreen):
     kvname = 'receive'
     
     def update(self):
-        self.screen.address = self.app.wallet.get_unused_address(None)
+        addr = self.app.get_receive_address()
+        self.screen.address = addr
+        req = self.app.wallet.receive_requests.get(addr)
+        if req:
+            self.screen.message = unicode(req.get('memo', ''))
+            amount = req.get('amount')
+            if amount:
+                self.screen.amount = self.app.format_amount_and_units(amount)
 
     def amount_callback(self, popup):
         amount_label = self.screen.ids.get('amount')
@@ -269,17 +315,35 @@ class ReceiveScreen(CScreen):
     @profiler
     def update_qr(self):
         uri = self.get_URI()
-        qr = self.screen.ids.get('qr')
+        qr = self.screen.ids.qr
         qr.set_data(uri)
 
     def do_copy(self):
         uri = self.get_URI()
         self.app._clipboard.put(uri, 'text/plain')
 
-    def do_clear(self):
+    def do_save(self):
+        addr = str(self.screen.address)
+        amount = str(self.screen.amount)
+        message = str(self.screen.message) #.ids.message_input.text)
+        if not message and not amount:
+            self.app.show_error(_('No message or amount'))
+            return
+        if amount:
+            amount = self.app.get_amount(amount)
+        else:
+            amount = 0
+        print "saving", amount, message
+        req = self.app.wallet.make_payment_request(addr, amount, message, None)
+        self.app.wallet.add_payment_request(req, self.app.electrum_config)
+        self.app.show_error(_('Request saved'))
+        self.app.update_tab('requests')
+
+    def do_new(self):
+        self.app.receive_address = None
         self.screen.amount = ''
         self.screen.message = ''
-
+        self.update()
 
 
 class ContactsScreen(CScreen):
@@ -311,6 +375,76 @@ class ContactsScreen(CScreen):
             contact_list.add_widget(ci)
 
 
+class InvoicesScreen(CScreen):
+    kvname = 'invoices'
+
+    def update(self):
+        self.menu_actions = [(_('Pay'), self.do_pay), (_('Delete'), self.do_delete)]
+        invoices_list = self.screen.ids.invoices_container
+        invoices_list.clear_widgets()
+        for pr in self.app.invoices.sorted_list():
+            ci = Factory.InvoiceItem()
+            ci.key = pr.get_id()
+            ci.requestor = pr.get_requestor()
+            ci.memo = pr.memo
+            ci.amount = self.app.format_amount_and_units(pr.get_amount())
+            status = self.app.invoices.get_status(ci.key)
+            if status == PR_PAID:
+                ci.icon = "atlas://gui/kivy/theming/light/confirmed"
+            elif status == PR_EXPIRED:
+                ci.icon = "atlas://gui/kivy/theming/light/important"
+            else:
+                ci.icon = "atlas://gui/kivy/theming/light/important"
+            exp = pr.get_expiration_date()
+            ci.date = format_time(exp) if exp else _('Never')
+            ci.screen = self
+            invoices_list.add_widget(ci)
+
+    def do_pay(self, obj):
+        self.app.do_pay(obj)
+
+    def do_delete(self, obj):
+        self.app.invoices.remove(obj.key)
+        self.app.update_tab('invoices')
+
+class RequestsScreen(CScreen):
+    kvname = 'requests'
+
+    def update(self):
+
+        self.menu_actions = [(_('Show'), self.do_show), (_('Delete'), self.do_delete)]
+
+        requests_list = self.screen.ids.requests_container
+        requests_list.clear_widgets()
+        for req in self.app.wallet.get_sorted_requests(self.app.electrum_config):
+            address = req['address']
+            timestamp = req.get('time', 0)
+            amount = req.get('amount')
+            expiration = req.get('exp', None)
+            status = req.get('status')
+            signature = req.get('sig')
+            ci = Factory.RequestItem()
+            ci.address = req['address']
+            ci.memo = self.app.wallet.get_label(address)
+            status = req.get('status')
+            if status == PR_PAID:
+                ci.icon = "atlas://gui/kivy/theming/light/confirmed"
+            elif status == PR_EXPIRED:
+                ci.icon = "atlas://gui/kivy/theming/light/important"
+            else:
+                ci.icon = "atlas://gui/kivy/theming/light/important"
+            ci.amount = self.app.format_amount_and_units(amount) if amount else ''
+            ci.date = format_time(timestamp)
+            ci.screen = self
+            requests_list.add_widget(ci)
+
+    def do_show(self, obj):
+        self.app.show_request(obj.address)
+
+    def do_delete(self, obj):
+        self.app.wallet.remove_payment_request(obj.address, self.app.electrum_config)
+        self.update()
+
 
 class CSpinner(Factory.Spinner):
     '''CustomDropDown that allows fading out the dropdown
@@ -340,27 +474,20 @@ class TabbedCarousel(Factory.TabbedPanel):
         scrlv = self._tab_strip.parent
         if not scrlv:
             return
-
         idx = self.tab_list.index(value)
-        if  idx == 0:
+        n = len(self.tab_list)
+        if idx in [0, 1]:
             scroll_x = 1
-        elif idx == len(self.tab_list) - 1:
+        elif idx in [n-1, n-2]:
             scroll_x = 0
         else:
-            self_center_x = scrlv.center_x
-            vcenter_x = value.center_x
-            diff_x = (self_center_x - vcenter_x)
-            try:
-                scroll_x = scrlv.scroll_x - (diff_x / scrlv.width)
-            except ZeroDivisionError:
-                pass
+            scroll_x = 1. * (n - idx - 1) / (n - 1)
+
         mation = Factory.Animation(scroll_x=scroll_x, d=.25)
         mation.cancel_all(scrlv)
         mation.start(scrlv)
 
     def on_current_tab(self, instance, value):
-        if value.text == 'default_tab':
-            return
         self.animate_tab_to_center(value)
 
     def on_index(self, instance, value):

gui/kivy/uix/ui_screens/about.kv

@@ -0,0 +1,12 @@
+Popup:
+    title: "About Electrum"
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: '1dp'
+        Label:
+            text: "Lightweight Bitcoin Wallet"
+        Label:
+            text: "Author: Thomas Voegtlin"
+        Label:
+            text: "https://electrum.org"
+        Widget

gui/kivy/uix/ui_screens/history.kv

@@ -5,23 +5,9 @@
 #:set mbtc_symbol unichr(187)
 
 
-<Card@GridLayout>
-    cols: 1
-    padding: '12dp' , '22dp', '12dp' , '12dp'
-    spacing: '12dp'
-    size_hint: 1, None
-    height: max(100, self.minimum_height)
-    canvas.before:
-        Color:
-            rgba: 1, 1, 1, 1
-        BorderImage:
-            border: 18, 18, 18, 18
-            source: 'atlas://gui/kivy/theming/light/card'
-            size: self.size
-            pos: self.pos
 
 <CardLabel@Label>
-    color: 0.45, 0.45, 0.45, 1
+    color: 0.95, 0.95, 0.95, 1
     size_hint: 1, None
     text: ''
     text_size: self.width, None
@@ -29,87 +15,48 @@
     halign: 'left'
     valign: 'top'
 
-<CardButton@Button>
-    background_normal: 'atlas://gui/kivy/theming/light/card_btn'
-    bold: True
-    font_size: '10sp'
-    color: 0.699, 0.699, 0.699, 1
-    size_hint: None, None
-    size: self.texture_size[0] + dp(32), self.texture_size[1] + dp(7)
 
-
-<CardItem@ToggleButtonBehavior+GridLayout>
-    canvas.before:
-        Color:
-            rgba: 0.192, .498, 0.745, 1 if self.state == 'down' else 0
-        Rectangle
-            size: self.size
-            pos: self.x, self.y + dp(5)
-    cols: 1
-    padding: '2dp', '2dp'
-    spacing: '2dp'
-    size_hint: 1, None
-    height: self.minimum_height
-    group: 'history'
-
-<RecentActivityItem@CardItem>
+<HistoryItem@CardItem>
     icon: 'atlas://gui/kivy/theming/light/important'
-    address: 'no address set'
+    message: ''
     value: 0
     amount: app.format_amount(self.value, True) if self.value is not None else '--'
-    amount_color: '#DB3627' if self.value < 0 else '#2EA442'
+    amount_color: '#FF6657' if self.value < 0 else '#2EA442'
     confirmations: 0
-    date: '0/0/0'
-    quote_text: '.'
+    date: ''
+    quote_text: ''
     spacing: '9dp'
-    on_release:
-        app.tx_selected(root.tx_hash, self.state)
+    Image:
+        id: icon
+        source: root.icon
+        size_hint: None, 1
+        width: self.height *.54
+        mipmap: True
     BoxLayout:
-        size_hint: 1, None
-        spacing: '8dp'
-        height: '32dp'
-        Image:
-            id: icon
-            source: root.icon
-            size_hint: None, 1
-            width: self.height *.54
-            mipmap: True
-        BoxLayout:
-            orientation: 'vertical'
-            Widget
-            CardLabel:
-                shorten: True
-                text: root.address
-                markup: False
-                text_size: self.size
-            CardLabel:
-                color: .699, .699, .699, 1
-                text: root.date
-                font_size: '12sp'
-            Widget
+        orientation: 'vertical'
+        Widget
         CardLabel:
-            halign: 'right'
+            text: root.date
+            font_size: '14sp'
+        CardLabel:
+            color: .699, .699, .699, 1
             font_size: '13sp'
-            size_hint: None, 1
-            width: '110sp'
-            markup: True
-            font_name: font_light
-            text:
-                u'[color={amount_color}]{sign}{amount} {unit}[/color]\n'\
-                u'[color=#B2B3B3][size=12sp]{qt}[/size]'\
-                u'[/color]'.format(amount_color=root.amount_color,\
-                amount=root.amount[1:], qt=root.quote_text, sign=root.amount[0],\
-                unit=app.base_unit)
-    CardSeparator
-
-<CardRecentActivity@Card>
-    GridLayout:
-        id: content
-        spacing: '7dp'
-        cols: 1
-        size_hint: 1, None
-        height: self.minimum_height
-        CardSeparator
+            shorten: True
+            text: root.message
+        Widget
+    CardLabel:
+        halign: 'right'
+        font_size: '15sp'
+        size_hint: None, 1
+        width: '110sp'
+        markup: True
+        font_name: font_light
+        text:
+            u'[color={amount_color}]{sign}{amount} {unit}[/color]\n'\
+            u'[color=#B2B3B3][size=13sp]{qt}[/size]'\
+            u'[/color]'.format(amount_color=root.amount_color,\
+            amount=root.amount[1:], qt=root.quote_text, sign=root.amount[0],\
+            unit=app.base_unit)
 
 
 HistoryScreen:
@@ -119,12 +66,9 @@ HistoryScreen:
         id: content
         do_scroll_x: False
         GridLayout
-            id: grid
-            cols: 1 #if root.width < root.height else 2
+            id: history_container
+            cols: 1
             size_hint: 1, None
             height: self.minimum_height
             padding: '12dp'
-            spacing: '12dp'
-            CardRecentActivity:
-                id: recent_activity_card
-
+            spacing: '2dp'

gui/kivy/uix/ui_screens/invoices.kv

@@ -0,0 +1,59 @@
+<InvoicesLabel@Label>
+    #color: .305, .309, .309, 1
+    text_size: self.width, None
+    halign: 'left'
+    valign: 'top'
+
+<InvoiceItem@CardItem>
+    requestor: ''
+    memo: ''
+    amount: ''
+    status: ''
+    date: ''
+    icon: 'atlas://gui/kivy/theming/light/important'
+    Image:
+        id: icon
+        source: root.icon
+        size_hint: None, 1
+        width: self.height *.54
+        mipmap: True
+    BoxLayout:
+        spacing: '8dp'
+        height: '32dp'
+        orientation: 'vertical'
+        Widget
+        InvoicesLabel:
+            text: root.requestor
+            shorten: True
+        InvoicesLabel:
+            text: root.memo
+            color: .699, .699, .699, 1
+            font_size: '13sp'
+            shorten: True
+        Widget
+    InvoicesLabel:
+        halign: 'right'
+        font_size: '15sp'
+        size_hint: None, 1
+        width: '110sp'
+        text: root.amount
+
+InvoicesScreen:
+    name: 'invoices'
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: '1dp'
+        ScrollView:
+            canvas.before:
+                Color:
+                    rgba: .8901, .8901, .8901, 0
+                Rectangle:
+                    size: self.size
+                    pos: self.pos
+            GridLayout:
+                cols: 1
+                id: invoices_container
+                size_hint: 1, None
+                height: self.minimum_height
+                spacing: '2dp'
+                padding: '12dp'

gui/kivy/uix/ui_screens/plugins.kv

@@ -1,27 +0,0 @@
-Popup:
-    title: _('Plugins')
-    id: popup
-    BoxLayout:
-        orientation: 'vertical'
-
-        GridLayout:
-            cols: 2
-            size_hint: 1, None
-            height: '100dp'
-            id: plugins_list
-            on_parent:
-                app.show_plugins(plugins_list)
-
-        Widget:
-            size_hint: 1, 1
-
-        BoxLayout:
-            Widget:
-                size_hint: 0.5, None
-            Button:
-                size_hint: 0.5, None
-                height: '48dp'
-                text: _('OK')
-                on_release:
-                    popup.dismiss()
-

gui/kivy/uix/ui_screens/receive.kv

@@ -42,7 +42,8 @@ ReceiveScreen:
             size_hint: 1, None
             height: '48dp'
             opacity: 0.5 if qr.shaded else 1
-            text: s.address
+            text: _('Bitcoin Address') + ': ' + s.address
+            text_size: self.width, None
 
         SendReceiveBlueBottom:
             id: blue_bottom
@@ -51,13 +52,15 @@ ReceiveScreen:
             BoxLayout:
                 size_hint: 1, None
                 height: blue_bottom.item_height
+                spacing: '5dp'
                 Image:
                     source: 'atlas://gui/kivy/theming/light/globe'
                     size_hint: None, None
                     size: '22dp', '22dp'
                     pos_hint: {'center_y': .5}
-                AmountButton:
+                BlueButton:
                     id: amount_label
+                    default_text: 'Amount'
                     text: s.amount if s.amount else 'Amount'
                     on_release: app.amount_dialog(s, False)
             CardSeparator:
@@ -74,12 +77,10 @@ ReceiveScreen:
                     size_hint: None, None
                     size: '22dp', '22dp'
                     pos_hint: {'center_y': .5}
-                TextInputBlue:
-                    id: message_input
-                    hint_text: 'Description'
-                    text: s.message
-                    on_text_validate: s.message = self.text
-
+                BlueButton:
+                    id: description
+                    text: s.message if s.message else _('Description')
+                    on_release: app.description_dialog(s)
         BoxLayout:
             size_hint: 1, None
             height: '48dp'
@@ -89,9 +90,14 @@ ReceiveScreen:
                 height: '48dp'
                 on_release: s.parent.do_copy()
             Button:
-                text: _('Clear')
+                text: _('Save')
                 size_hint: 1, None
                 height: '48dp'
-                on_release: s.parent.do_clear()
-        Widget:
-            size_hint: 1, 0.3
+                on_release: s.parent.do_save()
+            Button:
+                text: _('New')
+                size_hint: 1, None
+                height: '48dp'
+                on_release: s.parent.do_new()
+        #Widget:
+        #    size_hint: 1, 0.3

gui/kivy/uix/ui_screens/requests.kv

@@ -0,0 +1,60 @@
+<RequestLabel@Label>
+    #color: .305, .309, .309, 1
+    text_size: self.width, None
+    halign: 'left'
+    valign: 'top'
+
+<RequestItem@CardItem>
+    address: ''
+    memo: ''
+    amount: ''
+    status: ''
+    date: ''
+    icon: 'atlas://gui/kivy/theming/light/important'
+    Image:
+        id: icon
+        source: root.icon
+        size_hint: None, 1
+        width: self.height *.54
+        mipmap: True
+    BoxLayout:
+        spacing: '8dp'
+        height: '32dp'
+        orientation: 'vertical'
+        Widget
+        RequestLabel:
+            text: root.address
+            shorten: True
+        RequestLabel:
+            text: root.memo
+            color: .699, .699, .699, 1
+            font_size: '13sp'
+            shorten: True
+        Widget
+    RequestLabel:
+        halign: 'right'
+        font_size: '15sp'
+        size_hint: None, 1
+        width: '110sp'
+        text: root.amount
+
+
+RequestsScreen:
+    name: 'requests'
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: '1dp'
+        ScrollView:
+            canvas.before:
+                Color:
+                    rgba: .8901, .8901, .8901, 0
+                Rectangle:
+                    size: self.size
+                    pos: self.pos
+            GridLayout:
+                cols: 1
+                id: requests_container
+                size_hint_y: None
+                height: self.minimum_height
+                spacing: '2dp'
+                padding: '12dp'

gui/kivy/uix/ui_screens/send.kv

@@ -23,6 +23,7 @@ SendScreen:
             id: blue_bottom
             size_hint: 1, None
             height: self.minimum_height
+            spacing: '5dp'
             BoxLayout:
                 size_hint: 1, None
                 height: blue_bottom.item_height
@@ -32,32 +33,32 @@ SendScreen:
                     size_hint: None, None
                     size: '22dp', '22dp'
                     pos_hint: {'center_y': .5}
-                TextInputBlue:
+                BlueButton:
                     id: payto_e
-                    text: s.address
-                    hint_text: "Recipient"
+                    text: s.address if s.address else _('Recipient')
+                    on_release: app.address_dialog(s)
             CardSeparator:
                 opacity: message_selection.opacity
                 color: blue_bottom.foreground_color
             BoxLayout:
                 size_hint: 1, None
                 height: blue_bottom.item_height
+                spacing: '5dp'
                 Image:
                     source: 'atlas://gui/kivy/theming/light/globe'
                     size_hint: None, None
                     size: '22dp', '22dp'
                     pos_hint: {'center_y': .5}
-                AmountButton:
+                BlueButton:
                     id: amount_e
-                    text: s.amount if s.amount else 'Amount'
-                    on_release: app.amount_dialog(s, True)
-
+                    default_text: _('Amount')
+                    text: s.amount if s.amount else _('Amount')
+                    on_release: s.amount_dialog()
             CardSeparator:
                 opacity: message_selection.opacity
                 color: blue_bottom.foreground_color
             BoxLayout:
                 id: message_selection
-                opacity: 1
                 size_hint: 1, None
                 height: blue_bottom.item_height
                 spacing: '5dp'
@@ -66,11 +67,10 @@ SendScreen:
                     size_hint: None, None
                     size: '22dp', '22dp'
                     pos_hint: {'center_y': .5}
-                TextInputBlue:
-                    id: message_e
-                    hint_text: 'Description'
-                    text: s.message
-                    on_text_validate: s.message = self.text
+                BlueButton:
+                    id: description
+                    text: s.message if s.message else _('Description')
+                    on_release: app.description_dialog(s)
         BoxLayout:
             size_hint: 1, None
             height: '48dp'
@@ -78,7 +78,7 @@ SendScreen:
                 id: qr
                 text: _('QR Code')
                 on_release:
-                    app.scan_qr(on_complete=s.parent.set_URI)
+                    app.scan_qr(on_complete=app.set_URI)
             Button:
                 id: paste_button
                 text: _('Paste')

gui/kivy/uix/ui_screens/settings.kv

@@ -1,37 +0,0 @@
-Popup:
-    id: settings
-    title: _('Settings')
-
-    BoxLayout:
-        orientation: 'vertical'
-        SettingsItem:
-            title: _('PIN Code') + ' (%s)'%('ON' if app.wallet.use_encryption else 'OFF')
-            description: _("Your PIN code will be required in order to spend bitcoins.")
-            on_release:
-                app.change_password()
-                self.title = _('PIN Code') + ' (%s)'%('ON' if app.wallet.use_encryption else 'OFF')
-        CardSeparator
-        SettingsItem:
-            title: _('Denomination') + ' (' + app.base_unit + ')'
-            description: _("Base unit for Bitcoin amounts.")
-            on_release:
-                app._rotate_bu()
-                self.title = _('Denomination') + ' (' + app.base_unit + ')'
-        CardSeparator
-        SettingsItem:
-            title: _('OpenAlias')
-            description: "Email-like address."
-
-        Widget:
-            size_hint: 1, 1
-
-        BoxLayout:
-            Widget:
-                size_hint: 0.5, None
-            Button:
-                size_hint: 0.5, None
-                height: '48dp'
-                text: _('OK')
-                on_release:
-                    settings.dismiss()
-

gui/kivy/uix/ui_screens/status.kv

@@ -0,0 +1,31 @@
+#:import os os
+
+Popup:
+    title: "Balance"
+    confirmed: 0
+    unconfirmed: 0
+    unmatured: 0
+    on_parent:
+        self.confirmed, self.unconfirmed, self.x = app.wallet.get_balance()
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: '1dp'
+        GridLayout:
+            cols:2
+            Label:
+                text: _("Wallet:")
+            Label:
+                text: os.path.basename(app.wallet.storage.path)
+            Label:
+                text: _("Confirmed:")
+            Label: 
+                text: app.format_amount_and_units(root.confirmed)
+            Label:
+                text: _("Unconfirmed:")
+            Label:
+                text: app.format_amount_and_units(root.unconfirmed)
+            Label:
+                text: "Unmatured:"
+            Label:
+                text: app.format_amount_and_units(root.unmatured)
+        Widget

gui/kivy/uix/ui_screens/wallets.kv

@@ -1,35 +0,0 @@
-#:import os os
-
-Popup:
-    title: _('Wallets')
-    id: popup
-    BoxLayout:
-        orientation: 'vertical'
-        GridLayout:
-            size_hint_y: None
-            cols: 2
-            Label:
-                height: '32dp'
-                size_hint_y: None
-                text: _('Wallet file') + ':'
-            TextInput:
-                id: text_input
-                height: '32dp'
-                size_hint_y: None
-                text: os.path.basename(app.wallet.storage.path)
-
-        FileChooserIconView:
-            id: wallet_selector
-            path: os.path.dirname(app.wallet.storage.path)
-            on_selection: text_input.text = os.path.basename(self.selection[0]) if self.selection else ''
-            size_hint: 1, 1
-
-        BoxLayout:
-            Widget:
-                size_hint: 0.5, None
-            Button:
-                size_hint: 0.5, None
-                height: '48dp'
-                text: _('OK')
-                on_release:
-                    popup.dismiss()

gui/qt/__init__.py

@@ -64,7 +64,7 @@ class OpenFileEventFilter(QObject):
 
 
 
-class ElectrumGui:
+class ElectrumGui(MessageBoxMixin):
 
     def __init__(self, config, network, plugins):
         set_language(config.get('language'))
@@ -134,7 +134,7 @@ class ElectrumGui:
         try:
             storage = WalletStorage(filename)
         except Exception as e:
-            QMessageBox.information(None, _('Error'), str(e), _('OK'))
+            self.show_error(str(e))
             return
         if not storage.file_exists:
             recent = self.config.get('recently_open', [])
@@ -147,7 +147,7 @@ class ElectrumGui:
                 wallet = Wallet(storage)
             except BaseException as e:
                 traceback.print_exc(file=sys.stdout)
-                QMessageBox.warning(None, _('Warning'), str(e), _('OK'))
+                self.show_warning(str(e))
                 return
             action = wallet.get_action()
         # run wizard
@@ -162,32 +162,6 @@ class ElectrumGui:
 
         return wallet
 
-    def get_wallet_folder(self):
-        #return os.path.dirname(os.path.abspath(self.wallet.storage.path if self.wallet else self.wallet.storage.path))
-        return os.path.dirname(os.path.abspath(self.config.get_wallet_path()))
-
-    def new_wallet(self):
-        wallet_folder = self.get_wallet_folder()
-        i = 1
-        while True:
-            filename = "wallet_%d"%i
-            if filename in os.listdir(wallet_folder):
-                i += 1
-            else:
-                break
-        filename = line_dialog(None, _('New Wallet'), _('Enter file name') + ':', _('OK'), filename)
-        if not filename:
-            return
-        full_path = os.path.join(wallet_folder, filename)
-        storage = WalletStorage(full_path)
-        if storage.file_exists:
-            QMessageBox.critical(None, "Error", _("File exists"))
-            return
-        wizard = InstallWizard(self.app, self.config, self.network, storage)
-        wallet = wizard.run('new')
-        if wallet:
-            self.new_window(full_path)
-
     def new_window(self, path, uri=None):
         # Use a signal as can be called from daemon thread
         self.app.emit(SIGNAL('new_window'), path, uri)
@@ -245,6 +219,9 @@ class ElectrumGui:
         # main loop
         self.app.exec_()
 
+        # Shut down the timer cleanly
+        self.timer.stop()
+
         # clipboard persistence. see http://www.mail-archive.com/pyqt@riverbankcomputing.com/msg17328.html
         event = QtCore.QEvent(QtCore.QEvent.Clipboard)
         self.app.sendEvent(self.app.clipboard(), event)

gui/qt/address_dialog.py

@@ -25,9 +25,10 @@ from PyQt4.QtCore import *
 from util import *
 from history_widget import HistoryWidget
 
-class AddressDialog(QDialog):
+class AddressDialog(WindowModalDialog):
 
-    def __init__(self, address, parent):
+    def __init__(self, parent, address):
+        WindowModalDialog.__init__(self, parent, _("Address"))
         self.address = address
         self.parent = parent
         self.config = parent.config
@@ -35,10 +36,7 @@ class AddressDialog(QDialog):
         self.app = parent.app
         self.saved = True
 
-        QDialog.__init__(self)
         self.setMinimumWidth(700)
-        self.setWindowTitle(_("Address"))
-        self.setModal(1)
         vbox = QVBoxLayout()
         self.setLayout(vbox)
 

gui/qt/history_widget.py

@@ -74,7 +74,7 @@ class HistoryWidget(MyTreeWidget):
             icon, time_str = self.get_icon(conf, timestamp)
             v_str = self.parent.format_amount(value, True, whitespaces=True)
             balance_str = self.parent.format_amount(balance, whitespaces=True)
-            label, is_default_label = self.wallet.get_label(tx_hash)
+            label = self.wallet.get_label(tx_hash)
             entry = ['', tx_hash, time_str, label, v_str, balance_str]
             run_hook('history_tab_update', tx, entry)
             item = QTreeWidgetItem(entry)
@@ -88,8 +88,6 @@ class HistoryWidget(MyTreeWidget):
                 item.setForeground(4, QBrush(QColor("#BC1E1E")))
             if tx_hash:
                 item.setData(0, Qt.UserRole, tx_hash)
-            if is_default_label:
-                item.setForeground(3, QBrush(QColor('grey')))
             self.insertTopLevelItem(0, item)
             if current_tx == tx_hash:
                 self.setCurrentItem(item)

gui/qt/installwizard.py

@@ -62,17 +62,17 @@ class CosignWidget(QWidget):
 
 
 
-class InstallWizard(QDialog):
+class InstallWizard(WindowModalDialog, MessageBoxMixin):
 
     def __init__(self, app, config, network, storage):
-        QDialog.__init__(self)
+        title = 'Electrum' + '  -  ' + _('Install Wizard')
+        WindowModalDialog.__init__(self, None, title=title)
         self.app = app
         self.config = config
         self.network = network
         self.storage = storage
         self.setMinimumSize(575, 400)
         self.setMaximumSize(575, 400)
-        self.setWindowTitle('Electrum' + '  -  ' + _('Install Wizard'))
         self.connect(self, QtCore.SIGNAL('accept'), self.accept)
         self.stack = QStackedLayout()
         self.setLayout(self.stack)
@@ -139,8 +139,8 @@ class InstallWizard(QDialog):
                 button.setChecked(True)
 
         vbox.addStretch(1)
-        self.set_layout(vbox)
         vbox.addLayout(Buttons(CancelButton(self), OkButton(self, _('Next'))))
+        self.set_layout(vbox)
         self.show()
         self.raise_()
 
@@ -157,7 +157,7 @@ class InstallWizard(QDialog):
         if not r:
             return
         if prepare_seed(r) != prepare_seed(seed):
-            QMessageBox.warning(None, _('Error'), _('Incorrect seed'), _('OK'))
+            self.show_error(_('Incorrect seed'))
             return False
         else:
             return True
@@ -384,22 +384,6 @@ class InstallWizard(QDialog):
         wallet_type = '%dof%d'%(m,n)
         return wallet_type
 
-    def question(self, msg, yes_label=_('OK'), no_label=_('Cancel'), icon=None):
-        vbox = QVBoxLayout()
-        self.set_layout(vbox)
-        if icon:
-            logo = QLabel()
-            logo.setPixmap(icon)
-            vbox.addWidget(logo)
-        label = QLabel(msg)
-        label.setWordWrap(True)
-        vbox.addWidget(label)
-        vbox.addStretch(1)
-        vbox.addLayout(Buttons(CancelButton(self, no_label), OkButton(self, yes_label)))
-        if not self.exec_():
-            return None
-        return True
-
     def show_seed(self, seed, sid):
         vbox = seed_dialog.show_seed_box_msg(seed, sid)
         vbox.addLayout(Buttons(CancelButton(self), OkButton(self, _("Next"))))
@@ -407,22 +391,21 @@ class InstallWizard(QDialog):
         return self.exec_()
 
     def password_dialog(self):
-        msg = _("Please choose a password to encrypt your wallet keys.")+'\n'\
-              +_("Leave these fields empty if you want to disable encryption.")
-        from password_dialog import make_password_dialog, run_password_dialog
-        self.set_layout( make_password_dialog(self, None, msg) )
-        return run_password_dialog(self, None, self)[2]
+        from password_dialog import PasswordDialog
+        msg = _("Please choose a password to encrypt your wallet keys.\n"
+                "Leave these fields empty if you want to disable encryption.")
+        dialog = PasswordDialog(self, None, _("Choose a password"), msg, True)
+        return dialog.run()[2]
 
     def run(self, action):
         if self.storage.file_exists and action != 'new':
             path = self.storage.path
             msg = _("The file '%s' contains an incompletely created wallet.\n"
                     "Do you want to complete its creation now?") % path
-            if not question(msg):
-                if question(_("Do you want to delete '%s'?") % path):
+            if not self.question(msg):
+                if self.question(_("Do you want to delete '%s'?") % path):
                     os.remove(path)
-                    QMessageBox.information(self, _('Warning'),
-                                            _('The file was removed'), _('OK'))
+                    self.show_warning(_('The file was removed'))
                     return
                 return
         self.show()
@@ -434,7 +417,7 @@ class InstallWizard(QDialog):
             wallet = self.run_wallet_type(action, wallet_type)
         except BaseException as e:
             traceback.print_exc(file=sys.stdout)
-            QMessageBox.information(None, _('Error'), str(e), _('OK'))
+            self.show_error(str(e))
             return
         return wallet
 
@@ -463,7 +446,7 @@ class InstallWizard(QDialog):
             elif wallet_type == 'twofactor':
                 wallet_type = '2fa'
             if action == 'create':
-                self.storage.put('wallet_type', wallet_type, False)
+                self.storage.put('wallet_type', wallet_type)
 
         if action is None:
             return
@@ -527,7 +510,7 @@ class InstallWizard(QDialog):
             if self.config.get('server') is None:
                 self.network_dialog()
         else:
-            QMessageBox.information(None, _('Warning'), _('You are offline'), _('OK'))
+            self.show_warning(_('You are offline'))
 
 
         # start wallet threads
@@ -539,7 +522,7 @@ class InstallWizard(QDialog):
                 msg = _("Recovery successful") if wallet.is_found() else _("No transactions found for this seed")
             else:
                 msg = _("This wallet was restored offline. It may contain more addresses than displayed.")
-            QMessageBox.information(None, _('Information'), msg, _('OK'))
+            self.show_message(msg)
 
         return wallet
 
@@ -560,7 +543,7 @@ class InstallWizard(QDialog):
             password = self.password_dialog() if any(map(lambda x: Wallet.is_seed(x) or Wallet.is_xprv(x), key_list)) else None
             wallet = Wallet.from_multisig(key_list, password, self.storage, t)
         else:
-            self.storage.put('wallet_type', t, False)
+            self.storage.put('wallet_type', t)
             # call the constructor to load the plugin (side effect)
             Wallet(self.storage)
             wallet = always_hook('installwizard_restore', self, self.storage)

gui/qt/main_window.py

@@ -17,7 +17,7 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 import sys, time, threading
-import os.path, json, traceback
+import os, json, traceback
 import shutil
 import socket
 import weakref
@@ -40,20 +40,17 @@ from electrum.i18n import _
 from electrum.util import block_explorer, block_explorer_info, block_explorer_URL
 from electrum.util import format_satoshis, format_satoshis_plain, format_time
 from electrum.util import PrintError, NotEnoughFunds, StoreDict
-from electrum import Transaction
-from electrum import mnemonic
+from electrum import Transaction, mnemonic
 from electrum import util, bitcoin, commands, Wallet
 from electrum import SimpleConfig, COIN_CHOOSERS, WalletStorage
-from electrum import Imported_Wallet
-from electrum import paymentrequest
+from electrum import Imported_Wallet, paymentrequest
 
 from amountedit import BTCAmountEdit, MyLineEdit, BTCkBEdit
 from network_dialog import NetworkDialog
 from qrcodewidget import QRCodeWidget, QRDialog
-from qrtextedit import ScanQRTextEdit, ShowQRTextEdit
+from qrtextedit import ShowQRTextEdit
 from transaction_dialog import show_transaction
-
-
+from installwizard import InstallWizard
 
 
 
@@ -83,7 +80,6 @@ class StatusBarButton(QPushButton):
 
 
 from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_UNKNOWN, PR_EXPIRED
-from electrum.paymentrequest import PaymentRequest, get_payment_request
 
 pr_icons = {
     PR_UNPAID:":icons/unpaid.png",
@@ -106,7 +102,7 @@ expiration_values = [
 
 
 
-class ElectrumWindow(QMainWindow, PrintError):
+class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
 
     def __init__(self, gui_object, wallet):
         QMainWindow.__init__(self)
@@ -270,7 +266,7 @@ class ElectrumWindow(QMainWindow, PrintError):
         self.update_account_selector()
         # update menus
         self.new_account_menu.setVisible(self.wallet.can_create_accounts())
-        self.private_keys_menu.setEnabled(not self.wallet.is_watching_only())
+        self.export_menu.setEnabled(not self.wallet.is_watching_only())
         self.password_menu.setEnabled(self.wallet.can_change_password())
         self.seed_menu.setEnabled(self.wallet.has_seed())
         self.mpk_menu.setEnabled(self.wallet.is_deterministic())
@@ -288,14 +284,17 @@ class ElectrumWindow(QMainWindow, PrintError):
         except:
             self.setGeometry(100, 100, 840, 400)
         self.show()
+        self.warn_if_watching_only()
+        run_hook('load_wallet', wallet, self)
+
+    def warn_if_watching_only(self):
         if self.wallet.is_watching_only():
             msg = ' '.join([
                 _("This wallet is watching-only."),
                 _("This means you will not be able to spend Bitcoins with it."),
                 _("Make sure you own the seed phrase or the private keys, before you request Bitcoins to be sent to this wallet.")
             ])
-            QMessageBox.warning(self, _('Information'), msg, _('OK'))
-        run_hook('load_wallet', wallet, self)
+            self.show_warning(msg, title=_('Information'))
 
     def import_old_contacts(self):
         # backward compatibility: import contacts
@@ -321,7 +320,7 @@ class ElectrumWindow(QMainWindow, PrintError):
             self.wallet.synchronize()
 
     def open_wallet(self):
-        wallet_folder = self.gui_object.get_wallet_folder()
+        wallet_folder = self.get_wallet_folder()
         filename = unicode(QFileDialog.getOpenFileName(self, "Select your wallet file", wallet_folder))
         if not filename:
             return
@@ -339,11 +338,9 @@ class ElectrumWindow(QMainWindow, PrintError):
         if new_path != path:
             try:
                 shutil.copy2(path, new_path)
-                QMessageBox.information(None,"Wallet backup created", _("A copy of your wallet file was created in")+" '%s'" % str(new_path))
+                self.show_message(_("A copy of your wallet file was created in")+" '%s'" % str(new_path), title=_("Wallet backup created"))
             except (IOError, os.error), reason:
-                QMessageBox.critical(None,"Unable to create backup", _("Electrum was unable to copy your wallet file to the specified location.")+"\n" + str(reason))
-
-
+                self.show_critical(_("Electrum was unable to copy your wallet file to the specified location.") + "\n" + str(reason), title=_("Unable to create backup"))
 
     def update_recently_visited(self, filename=None):
         recent = self.config.get('recently_open', [])
@@ -361,13 +358,39 @@ class ElectrumWindow(QMainWindow, PrintError):
             self.recently_visited_menu.addAction(b, loader(k)).setShortcut(QKeySequence("Ctrl+%d"%(i+1)))
         self.recently_visited_menu.setEnabled(len(recent))
 
+    def get_wallet_folder(self):
+        return os.path.dirname(os.path.abspath(self.config.get_wallet_path()))
+
+    def new_wallet(self):
+        wallet_folder = self.get_wallet_folder()
+        i = 1
+        while True:
+            filename = "wallet_%d" % i
+            if filename in os.listdir(wallet_folder):
+                i += 1
+            else:
+                break
+        filename = line_dialog(self, _('New Wallet'), _('Enter file name')
+                               + ':', _('OK'), filename)
+        if not filename:
+            return
+        full_path = os.path.join(wallet_folder, filename)
+        storage = WalletStorage(full_path)
+        if storage.file_exists:
+            self.show_critical(_("File exists"))
+            return
+        wizard = InstallWizard(self.app, self.config, self.network, storage)
+        wallet = wizard.run('new')
+        if wallet:
+            self.new_window(full_path)
+
     def init_menubar(self):
         menubar = QMenuBar()
 
         file_menu = menubar.addMenu(_("&File"))
         self.recently_visited_menu = file_menu.addMenu(_("&Recently open"))
         file_menu.addAction(_("&Open"), self.open_wallet).setShortcut(QKeySequence.Open)
-        file_menu.addAction(_("&New/Restore"), self.gui_object.new_wallet).setShortcut(QKeySequence.New)
+        file_menu.addAction(_("&New/Restore"), self.new_wallet).setShortcut(QKeySequence.New)
         file_menu.addAction(_("&Save Copy"), self.backup_wallet).setShortcut(QKeySequence.SaveAs)
         file_menu.addSeparator()
         file_menu.addAction(_("&Quit"), self.close)
@@ -435,7 +458,7 @@ class ElectrumWindow(QMainWindow, PrintError):
             _("Before reporting a bug, upgrade to the most recent version of Electrum (latest release or git HEAD), and include the version number in your report."),
             _("Try to explain not only what the bug is, but how it occurs.")
          ])
-        QMessageBox.information(self, "Electrum - " + _("Reporting Bugs"), msg)
+        self.show_message(msg, title="Electrum - " + _("Reporting Bugs"))
 
     def notify_transactions(self):
         if not self.network or not self.network.is_connected():
@@ -582,7 +605,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
     def show_address(self, addr):
         import address_dialog
-        d = address_dialog.AddressDialog(addr, self)
+        d = address_dialog.AddressDialog(self, addr)
         d.exec_()
 
     def show_transaction(self, tx, tx_desc = None):
@@ -744,7 +767,7 @@ class ElectrumWindow(QMainWindow, PrintError):
                         try:
                             self.wallet.sign_payment_request(addr, alias, alias_addr, password)
                         except Exception as e:
-                            QMessageBox.warning(self, _('Error'), str(e), _('OK'))
+                            self.show_error(str(e))
                             return
                     else:
                         return
@@ -757,7 +780,7 @@ class ElectrumWindow(QMainWindow, PrintError):
         amount = self.receive_amount_e.get_amount()
         message = unicode(self.receive_message_e.text())
         if not message and not amount:
-            QMessageBox.warning(self, _('Error'), _('No message or amount'), _('OK'))
+            self.show_error(_('No message or amount'))
             return False
         i = self.expires_combo.currentIndex()
         expiration = map(lambda x: x[1], expiration_values)[i]
@@ -769,8 +792,7 @@ class ElectrumWindow(QMainWindow, PrintError):
         self.save_request_button.setEnabled(False)
 
     def view_and_paste(self, title, msg, data):
-        dialog = QDialog(self)
-        dialog.setWindowTitle(title)
+        dialog = WindowModalDialog(self, title)
         vbox = QVBoxLayout()
         label = QLabel(msg)
         label.setWordWrap(True)
@@ -1129,7 +1151,7 @@ class ElectrumWindow(QMainWindow, PrintError):
                         self.wallet.check_password(password)
                         break
                     except Exception as e:
-                        QMessageBox.warning(parent, _('Error'), str(e), _('OK'))
+                        self.show_error(str(e), parent=parent)
                         continue
             else:
                 password = None
@@ -1140,7 +1162,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
     def read_send_tab(self):
         if self.payment_request and self.payment_request.has_expired():
-            QMessageBox.warning(self, _('Error'), _('Payment request has expired'), _('OK'))
+            self.show_error(_('Payment request has expired'))
             return
         label = unicode( self.message_e.text() )
 
@@ -1161,23 +1183,23 @@ class ElectrumWindow(QMainWindow, PrintError):
                     return
 
         if not outputs:
-            QMessageBox.warning(self, _('Error'), _('No outputs'), _('OK'))
+            self.show_error(_('No outputs'))
             return
 
         for _type, addr, amount in outputs:
             if addr is None:
-                QMessageBox.warning(self, _('Error'), _('Bitcoin Address is None'), _('OK'))
+                self.show_error(_('Bitcoin Address is None'))
                 return
             if _type == 'address' and not bitcoin.is_address(addr):
-                QMessageBox.warning(self, _('Error'), _('Invalid Bitcoin Address'), _('OK'))
+                self.show_error(_('Invalid Bitcoin Address'))
                 return
             if amount is None:
-                QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
+                self.show_error(_('Invalid Amount'))
                 return
 
         fee = self.fee_e.get_amount()
         if fee is None:
-            QMessageBox.warning(self, _('Error'), _('Invalid Fee'), _('OK'))
+            self.show_error(_('Invalid Fee'))
             return
 
         coins = self.get_coins()
@@ -1203,7 +1225,7 @@ class ElectrumWindow(QMainWindow, PrintError):
             return
 
         if tx.get_fee() < MIN_RELAY_TX_FEE and tx.requires_fee(self.wallet):
-            QMessageBox.warning(self, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
+            self.show_error(_("This transaction requires a higher fee, or it will not be propagated by the network"))
             return
 
         if self.show_before_broadcast():
@@ -1258,16 +1280,14 @@ class ElectrumWindow(QMainWindow, PrintError):
         def sign_thread():
             if not self.wallet.is_watching_only():
                 self.wallet.sign_transaction(tx, password)
-        def on_sign_successful(ret):
+        def on_signed(ret):
             success[0] = True
-        def on_dialog_close():
+        def on_finished():
             self.send_button.setDisabled(False)
             callback(success[0])
 
-        # keep a reference to WaitingDialog or the gui might crash
-        self.waiting_dialog = WaitingDialog(parent, 'Signing transaction...', sign_thread, on_sign_successful, on_dialog_close)
-        self.waiting_dialog.start()
-
+        WaitingDialog(parent, _('Signing transaction...'), sign_thread,
+                      on_success=on_signed, on_finished=on_finished)
 
     def broadcast_transaction(self, tx, tx_desc, parent=None):
 
@@ -1296,19 +1316,16 @@ class ElectrumWindow(QMainWindow, PrintError):
             if status:
                 if tx_desc is not None and tx.is_complete():
                     self.wallet.set_label(tx.hash(), tx_desc)
-                QMessageBox.information(parent, '', _('Payment sent.') + '\n' + msg, _('OK'))
+                self.show_message(_('Payment sent.') + '\n' + msg, parent=parent)
                 self.invoices_list.update()
                 self.do_clear()
             else:
-                QMessageBox.warning(parent, _('Error'), msg, _('OK'))
+                self.show_error(msg, parent=parent)
             self.send_button.setDisabled(False)
 
-        if parent == None:
-            parent = self
-        self.waiting_dialog = WaitingDialog(parent, 'Broadcasting transaction...', broadcast_thread, broadcast_done)
-        self.waiting_dialog.start()
-
-
+        parent = parent or self
+        WaitingDialog(parent, _('Broadcasting transaction...'),
+                      broadcast_thread, broadcast_done)
 
     def prepare_for_payment_request(self):
         self.tabs.setCurrentIndex(1)
@@ -1346,37 +1363,28 @@ class ElectrumWindow(QMainWindow, PrintError):
         self.payment_request = None
         self.do_clear()
 
+    def on_pr(self, request):
+        self.payment_request = request
+        if self.payment_request.verify(self.contacts):
+            self.emit(SIGNAL('payment_request_ok'))
+        else:
+            self.emit(SIGNAL('payment_request_error'))
+
     def pay_to_URI(self, URI):
         if not URI:
             return
         try:
-            out = util.parse_URI(unicode(URI))
-        except Exception as e:
-            QMessageBox.warning(self, _('Error'), _('Invalid bitcoin URI:') + '\n' + str(e), _('OK'))
+            out = util.parse_URI(unicode(URI), self.on_pr)
+        except BaseException as e:
+            self.show_error(_('Invalid bitcoin URI:') + '\n' + str(e))
             return
         self.tabs.setCurrentIndex(1)
-
         r = out.get('r')
         sig = out.get('sig')
         name = out.get('name')
         if r or (name and sig):
-            def get_payment_request_thread():
-                if name and sig:
-                    from electrum import paymentrequest
-                    pr = paymentrequest.serialize_request(out).SerializeToString()
-                    self.payment_request = paymentrequest.PaymentRequest(pr)
-                else:
-                    self.payment_request = get_payment_request(r)
-                if self.payment_request.verify(self.contacts):
-                    self.emit(SIGNAL('payment_request_ok'))
-                else:
-                    self.emit(SIGNAL('payment_request_error'))
-            t = threading.Thread(target=get_payment_request_thread)
-            t.setDaemon(True)
-            t.start()
             self.prepare_for_payment_request()
             return
-
         address = out.get('address')
         amount = out.get('amount')
         label = out.get('label')
@@ -1555,6 +1563,13 @@ class ElectrumWindow(QMainWindow, PrintError):
     def paytomany(self):
         self.tabs.setCurrentIndex(1)
         self.payto_e.paytomany()
+        msg = '\n'.join([
+            _('Enter a list of outputs in the \'Pay to\' field.'),
+            _('One output per line.'),
+            _('Format: address, amount'),
+            _('You may load a CSV file using the file icon.')
+        ])
+        self.show_warning(msg, title=_('Pay to many'))
 
     def payto_contacts(self, labels):
         paytos = [self.get_contact_payto(label) for label in labels]
@@ -1578,7 +1593,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
     def set_contact(self, label, address):
         if not is_valid(address):
-            QMessageBox.warning(self, _('Error'), _('Invalid Address'), _('OK'))
+            self.show_error(_('Invalid Address'))
             self.contacts_list.update()  # Displays original unchanged value
             return False
         self.contacts[label] = ('address', address)
@@ -1628,8 +1643,7 @@ class ElectrumWindow(QMainWindow, PrintError):
         self.show_pr_details(pr)
 
     def show_pr_details(self, pr):
-        d = QDialog(self)
-        d.setWindowTitle(_("Invoice"))
+        d = WindowModalDialog(self, _("Invoice"))
         vbox = QVBoxLayout(d)
         grid = QGridLayout()
         grid.addWidget(QLabel(_("Requestor") + ':'), 0, 0)
@@ -1840,8 +1854,39 @@ class ElectrumWindow(QMainWindow, PrintError):
 
     def change_password_dialog(self):
         from password_dialog import PasswordDialog
-        d = PasswordDialog(self.wallet, self)
-        d.run()
+
+        if self.wallet and self.wallet.is_watching_only():
+            self.show_error(_('This is a watching-only wallet'))
+            return
+
+        msg = (_('Your wallet is encrypted. Use this dialog to change your '
+                 'password. To disable wallet encryption, enter an empty new '
+                 'password.') if self.wallet.use_encryption
+               else _('Your wallet keys are not encrypted'))
+        d = PasswordDialog(self, self.wallet, _("Set Password"), msg, True)
+        ok, password, new_password = d.run()
+        if not ok:
+            return
+
+        try:
+            self.wallet.check_password(password)
+        except BaseException as e:
+            self.show_error(str(e))
+            return
+
+        try:
+            self.wallet.update_password(password, new_password)
+        except:
+            traceback.print_exc(file=sys.stdout)
+            self.show_error(_('Failed to update password'))
+            return
+
+        if new_password:
+            msg = _('Password was updated successfully')
+        else:
+            msg = _('This wallet is not encrypted')
+        self.show_message(msg, title=_("Success"))
+
         self.update_lock_icon()
 
     def toggle_search(self):
@@ -1866,8 +1911,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def new_contact_dialog(self):
-        d = QDialog(self)
-        d.setWindowTitle(_("New Contact"))
+        d = WindowModalDialog(self, _("New Contact"))
         vbox = QVBoxLayout(d)
         vbox.addWidget(QLabel(_('New Contact') + ':'))
         grid = QGridLayout()
@@ -1892,9 +1936,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
     @protected
     def new_account_dialog(self, password):
-        dialog = QDialog(self)
-        dialog.setModal(1)
-        dialog.setWindowTitle(_("New Account"))
+        dialog = WindowModalDialog(self, _("New Account"))
         vbox = QVBoxLayout()
         vbox.addWidget(QLabel(_('Account name')+':'))
         e = QLineEdit()
@@ -1917,11 +1959,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def show_master_public_keys(self):
-
-        dialog = QDialog(self)
-        dialog.setModal(1)
-        dialog.setWindowTitle(_("Master Public Keys"))
-
+        dialog = WindowModalDialog(self, "Master Public Keys")
         mpk_dict = self.wallet.get_master_public_keys()
         vbox = QVBoxLayout()
         # only show the combobox in case multiple accounts are available
@@ -1966,13 +2004,13 @@ class ElectrumWindow(QMainWindow, PrintError):
     @protected
     def show_seed_dialog(self, password):
         if not self.wallet.has_seed():
-            QMessageBox.information(self, _('Message'), _('This wallet has no seed'), _('OK'))
+            self.show_message(_('This wallet has no seed'))
             return
 
         try:
             mnemonic = self.wallet.get_mnemonic(password)
         except BaseException as e:
-            QMessageBox.warning(self, _('Error'), str(e), _('OK'))
+            self.show_error(str(e))
             return
         from seed_dialog import SeedDialog
         d = SeedDialog(self, mnemonic, self.wallet.has_imported_keys())
@@ -1980,10 +2018,10 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
 
-    def show_qrcode(self, data, title = _("QR code")):
+    def show_qrcode(self, data, title = _("QR code"), parent=None):
         if not data:
             return
-        d = QRDialog(data, self, title)
+        d = QRDialog(data, parent or self, title)
         d.exec_()
 
     def show_public_keys(self, address):
@@ -1995,10 +2033,8 @@ class ElectrumWindow(QMainWindow, PrintError):
             self.show_message(str(e))
             return
 
-        d = QDialog(self)
+        d = WindowModalDialog(self, _("Public key"))
         d.setMinimumSize(600, 200)
-        d.setModal(1)
-        d.setWindowTitle(_("Public key"))
         vbox = QVBoxLayout()
         vbox.addWidget( QLabel(_("Address") + ': ' + address))
         vbox.addWidget( QLabel(_("Public key") + ':'))
@@ -2019,10 +2055,8 @@ class ElectrumWindow(QMainWindow, PrintError):
             self.show_message(str(e))
             return
 
-        d = QDialog(self)
+        d = WindowModalDialog(self, _("Private key"))
         d.setMinimumSize(600, 200)
-        d.setModal(1)
-        d.setWindowTitle(_("Private key"))
         vbox = QVBoxLayout()
         vbox.addWidget( QLabel(_("Address") + ': ' + address))
         vbox.addWidget( QLabel(_("Private key") + ':'))
@@ -2056,9 +2090,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def sign_verify_message(self, address=''):
-        d = QDialog(self)
-        d.setModal(1)
-        d.setWindowTitle(_('Sign/verify Message'))
+        d = WindowModalDialog(self, _('Sign/verify Message'))
         d.setMinimumSize(410, 290)
 
         layout = QGridLayout(d)
@@ -2117,9 +2149,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def encrypt_message(self, address = ''):
-        d = QDialog(self)
-        d.setModal(1)
-        d.setWindowTitle(_('Encrypt/decrypt Message'))
+        d = WindowModalDialog(self, _('Encrypt/decrypt Message'))
         d.setMinimumSize(610, 490)
 
         layout = QGridLayout(d)
@@ -2157,22 +2187,9 @@ class ElectrumWindow(QMainWindow, PrintError):
         layout.addLayout(hbox, 4, 1)
         d.exec_()
 
-
-    def question(self, msg):
-        return QMessageBox.question(self, _('Message'), msg, QMessageBox.Yes | QMessageBox.No, QMessageBox.No) == QMessageBox.Yes
-
-    def show_message(self, msg):
-        QMessageBox.information(self, _('Message'), msg, _('OK'))
-
-    def show_warning(self, msg):
-        QMessageBox.warning(self, _('Warning'), msg, _('OK'))
-
     def password_dialog(self, msg=None, parent=None):
-        if parent == None:
-            parent = self
-        d = QDialog(parent)
-        d.setModal(1)
-        d.setWindowTitle(_("Enter Password"))
+        parent = parent or self
+        d = WindowModalDialog(parent, _("Enter Password"))
         pw = QLineEdit()
         pw.setEchoMode(2)
         vbox = QVBoxLayout()
@@ -2200,33 +2217,24 @@ class ElectrumWindow(QMainWindow, PrintError):
         except:
             is_hex = False
 
-        if is_hex:
-            try:
-                return Transaction(txt)
-            except:
-                traceback.print_exc(file=sys.stdout)
-                QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
-                return
-
         try:
+            if is_hex:
+                return Transaction(txt)
             tx_dict = json.loads(str(txt))
             assert "hex" in tx_dict.keys()
             tx = Transaction(tx_dict["hex"])
-            #if tx_dict.has_key("input_info"):
-            #    input_info = json.loads(tx_dict['input_info'])
-            #    tx.add_input_info(input_info)
             return tx
-        except Exception:
+        except:
             traceback.print_exc(file=sys.stdout)
-            QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
-
+            self.show_critical(_("Electrum was unable to parse your transaction"))
+            return
 
     def read_tx_from_qrcode(self):
         from electrum import qrscanner
         try:
             data = qrscanner.scan_qr(self.config)
-        except BaseException, e:
-            QMessageBox.warning(self, _('Error'), _(e), _('OK'))
+        except BaseException as e:
+            self.show_error(str(e))
             return
         if not data:
             return
@@ -2252,8 +2260,8 @@ class ElectrumWindow(QMainWindow, PrintError):
         try:
             with open(fileName, "r") as f:
                 file_content = f.read()
-        except (ValueError, IOError, os.error), reason:
-            QMessageBox.critical(None, _("Unable to read file or no transaction found"), _("Electrum was unable to open your transaction file") + "\n" + str(reason))
+        except (ValueError, IOError, os.error) as reason:
+            self.show_critical(_("Electrum was unable to open your transaction file") + "\n" + str(reason), title=_("Unable to read file or no transaction found"))
         return self.tx_from_text(file_content)
 
     def do_process_from_text(self):
@@ -2292,11 +2300,10 @@ class ElectrumWindow(QMainWindow, PrintError):
         try:
             self.wallet.check_password(password)
         except Exception as e:
-            QMessageBox.warning(self, _('Error'), str(e), _('OK'))
+            self.show_error(str(e))
             return
 
-        d = QDialog(self)
-        d.setWindowTitle(_('Private keys'))
+        d = WindowModalDialog(self, _('Private keys'))
         d.setMinimumSize(850, 300)
         vbox = QVBoxLayout(d)
 
@@ -2349,9 +2356,12 @@ class ElectrumWindow(QMainWindow, PrintError):
 
         try:
             self.do_export_privkeys(filename, private_keys, csv_button.isChecked())
-        except (IOError, os.error), reason:
-            export_error_label = _("Electrum was unable to produce a private key-export.")
-            QMessageBox.critical(None, _("Unable to create csv"), export_error_label + "\n" + str(reason))
+        except (IOError, os.error) as reason:
+            txt = "\n".join([
+                _("Electrum was unable to produce a private key-export."),
+                str(reason)
+            ])
+            self.show_critical(txt, title=_("Unable to create csv"))
 
         except Exception as e:
             self.show_message(str(e))
@@ -2381,9 +2391,9 @@ class ElectrumWindow(QMainWindow, PrintError):
             f.close()
             for key, value in json.loads(data).items():
                 self.wallet.set_label(key, value)
-            QMessageBox.information(None, _("Labels imported"), _("Your labels were imported from")+" '%s'" % str(labelsFile))
-        except (IOError, os.error), reason:
-            QMessageBox.critical(None, _("Unable to import labels"), _("Electrum was unable to import your labels.")+"\n" + str(reason))
+            self.show_message(_("Your labels were imported from") + " '%s'" % str(labelsFile))
+        except (IOError, os.error) as reason:
+            self.show_critical(_("Electrum was unable to import your labels.") + "\n" + str(reason))
 
 
     def do_export_labels(self):
@@ -2393,14 +2403,13 @@ class ElectrumWindow(QMainWindow, PrintError):
             if fileName:
                 with open(fileName, 'w+') as f:
                     json.dump(labels, f)
-                QMessageBox.information(None, _("Labels exported"), _("Your labels where exported to")+" '%s'" % str(fileName))
+                self.show_message(_("Your labels where exported to") + " '%s'" % str(fileName))
         except (IOError, os.error), reason:
-            QMessageBox.critical(None, _("Unable to export labels"), _("Electrum was unable to export your labels.")+"\n" + str(reason))
+            self.show_critical(_("Electrum was unable to export your labels.") + "\n" + str(reason))
 
 
     def export_history_dialog(self):
-        d = QDialog(self)
-        d.setWindowTitle(_('Export History'))
+        d = WindowModalDialog(self, _('Export History'))
         d.setMinimumSize(400, 200)
         vbox = QVBoxLayout(d)
         defaultname = os.path.expanduser('~/electrum-history.csv')
@@ -2421,9 +2430,9 @@ class ElectrumWindow(QMainWindow, PrintError):
             self.do_export_history(self.wallet, filename, csv_button.isChecked())
         except (IOError, os.error), reason:
             export_error_label = _("Electrum was unable to produce a transaction export.")
-            QMessageBox.critical(self, _("Unable to export history"), export_error_label + "\n" + str(reason))
+            self.show_critical(export_error_label + "\n" + str(reason), title=_("Unable to export history"))
             return
-        QMessageBox.information(self,_("History exported"), _("Your wallet history has been successfully exported."))
+        self.show_message(_("Your wallet history has been successfully exported."))
 
 
     def do_export_history(self, wallet, fileName, is_csv):
@@ -2445,7 +2454,7 @@ class ElectrumWindow(QMainWindow, PrintError):
                 value_string = '--'
 
             if tx_hash:
-                label, is_default_label = wallet.get_label(tx_hash)
+                label = wallet.get_label(tx_hash)
                 label = label.encode('utf-8')
             else:
                 label = ""
@@ -2467,12 +2476,11 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def sweep_key_dialog(self):
-        d = QDialog(self)
-        d.setWindowTitle(_('Sweep private keys'))
+        d = WindowModalDialog(self, title=_('Sweep private keys'))
         d.setMinimumSize(600, 300)
 
         vbox = QVBoxLayout(d)
-        vbox.addWidget(QLabel(_("Enter private keys")))
+        vbox.addWidget(QLabel(_("Enter private keys:")))
 
         keys_e = QTextEdit()
         keys_e.setTabChangesFocus(True)
@@ -2508,16 +2516,17 @@ class ElectrumWindow(QMainWindow, PrintError):
         if not tx:
             self.show_message(_('No inputs found. (Note that inputs need to be confirmed)'))
             return
+        self.warn_if_watching_only()
         self.show_transaction(tx)
 
 
     @protected
     def do_import_privkey(self, password):
         if not self.wallet.has_imported_keys():
-            r = QMessageBox.question(None, _('Warning'), '<b>'+_('Warning') +':\n</b><br/>'+ _('Imported keys are not recoverable from seed.') + ' ' \
-                                         + _('If you ever need to restore your wallet from its seed, these keys will be lost.') + '<p>' \
-                                         + _('Are you sure you understand what you are doing?'), 3, 4)
-            if r == 4: return
+            if not self.question('<b>'+_('Warning') +':\n</b><br/>'+ _('Imported keys are not recoverable from seed.') + ' ' \
+                                 + _('If you ever need to restore your wallet from its seed, these keys will be lost.') + '<p>' \
+                                 + _('Are you sure you understand what you are doing?'), title=_('Warning')):
+                return
 
         text = text_dialog(self, _('Import private keys'), _("Enter private keys")+':', _("Import"))
         if not text: return
@@ -2536,18 +2545,16 @@ class ElectrumWindow(QMainWindow, PrintError):
             else:
                 addrlist.append(addr)
         if addrlist:
-            QMessageBox.information(self, _('Information'), _("The following addresses were added") + ':\n' + '\n'.join(addrlist))
+            self.show_message(_("The following addresses were added") + ':\n' + '\n'.join(addrlist))
         if badkeys:
-            QMessageBox.critical(self, _('Error'), _("The following inputs could not be imported") + ':\n'+ '\n'.join(badkeys))
+            self.show_critical(_("The following inputs could not be imported") + ':\n'+ '\n'.join(badkeys))
         self.address_list.update()
         self.history_list.update()
 
 
     def settings_dialog(self):
         self.need_restart = False
-        d = QDialog(self)
-        d.setWindowTitle(_('Preferences'))
-        d.setModal(1)
+        d = WindowModalDialog(self, _('Preferences'))
         vbox = QVBoxLayout()
         tabs = QTabWidget()
         gui_widgets = []
@@ -2593,21 +2600,6 @@ class ElectrumWindow(QMainWindow, PrintError):
         nz.valueChanged.connect(on_nz)
         gui_widgets.append((nz_label, nz))
 
-        choosers = sorted(COIN_CHOOSERS.keys())
-        chooser_name = self.wallet.coin_chooser_name(self.config)
-        msg = _('Choose coin (UTXO) selection method.  The following are available:\n\n')
-        msg += '\n\n'.join(key + ": " + klass.__doc__
-                         for key, klass in COIN_CHOOSERS.items())
-        chooser_label = HelpLabel(_('Coin selection') + ':', msg)
-        chooser_combo = QComboBox()
-        chooser_combo.addItems(choosers)
-        chooser_combo.setCurrentIndex(choosers.index(chooser_name))
-        def on_chooser(x):
-            chooser_name = choosers[chooser_combo.currentIndex()]
-            self.config.set_key('coin_chooser', chooser_name)
-        chooser_combo.currentIndexChanged.connect(on_chooser)
-        tx_widgets.append((chooser_label, chooser_combo))
-
         msg = _('Fee per kilobyte of transaction.') + '\n' \
               + _('If you enable dynamic fees, this parameter will be used as upper bound.')
         fee_label = HelpLabel(_('Transaction fee per kb') + ':', msg)
@@ -2784,6 +2776,24 @@ class ElectrumWindow(QMainWindow, PrintError):
         can_edit_fees_cb.setToolTip(_('This option lets you edit fees in the send tab.'))
         tx_widgets.append((can_edit_fees_cb, None))
 
+        def fmt_docs(key, klass):
+            lines = [ln.lstrip(" ") for ln in klass.__doc__.split("\n")]
+            return '\n'.join([key, "", " ".join(lines)])
+
+        choosers = sorted(COIN_CHOOSERS.keys())
+        chooser_name = self.wallet.coin_chooser_name(self.config)
+        msg = _('Choose coin (UTXO) selection method.  The following are available:\n\n')
+        msg += '\n\n'.join(fmt_docs(*item) for item in COIN_CHOOSERS.items())
+        chooser_label = HelpLabel(_('Coin selection') + ':', msg)
+        chooser_combo = QComboBox()
+        chooser_combo.addItems(choosers)
+        chooser_combo.setCurrentIndex(choosers.index(chooser_name))
+        def on_chooser(x):
+            chooser_name = choosers[chooser_combo.currentIndex()]
+            self.config.set_key('coin_chooser', chooser_name)
+        chooser_combo.currentIndexChanged.connect(on_chooser)
+        tx_widgets.append((chooser_label, chooser_combo))
+
         tabs_info = [
             (tx_widgets, _('Transactions')),
             (gui_widgets, _('Appearance')),
@@ -2813,13 +2823,11 @@ class ElectrumWindow(QMainWindow, PrintError):
 
         run_hook('close_settings_dialog')
         if self.need_restart:
-            QMessageBox.warning(self, _('Success'), _('Please restart Electrum to activate the new GUI settings'), _('OK'))
-
-
+            self.show_warning(_('Please restart Electrum to activate the new GUI settings'), title=_('Success'))
 
     def run_network_dialog(self):
         if not self.network:
-            QMessageBox.warning(self, _('Offline'), _('You are using Electrum in offline mode.\nRestart Electrum if you want to get connected.'), _('OK'))
+            self.show_warning(_('You are using Electrum in offline mode; restart Electrum if you want to get connected'), title=_('Offline'))
             return
         NetworkDialog(self.wallet.network, self.config, self).do_exec()
 
@@ -2839,9 +2847,7 @@ class ElectrumWindow(QMainWindow, PrintError):
 
 
     def plugins_dialog(self):
-        self.pluginsdialog = d = QDialog(self)
-        d.setWindowTitle(_('Electrum Plugins'))
-        d.setModal(1)
+        self.pluginsdialog = d = WindowModalDialog(self, _('Electrum Plugins'))
 
         plugins = self.gui_object.plugins
 
@@ -2867,7 +2873,7 @@ class ElectrumWindow(QMainWindow, PrintError):
         def enable_settings_widget(p, name, i):
             widget = settings_widgets.get(name)
             if not widget and p and p.requires_settings():
-                widget = settings_widgets[name] = p.settings_widget(self)
+                widget = settings_widgets[name] = p.settings_widget(d)
                 grid.addWidget(widget, i, 1)
             if widget:
                 widget.setEnabled(bool(p and p.is_enabled()))
@@ -2904,9 +2910,7 @@ class ElectrumWindow(QMainWindow, PrintError):
     def show_account_details(self, k):
         account = self.wallet.accounts[k]
 
-        d = QDialog(self)
-        d.setWindowTitle(_('Account Details'))
-        d.setModal(1)
+        d = WindowModalDialog(self, _('Account Details'))
 
         vbox = QVBoxLayout(d)
         name = self.wallet.get_account_name(k)

gui/qt/network_dialog.py

@@ -16,30 +16,21 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import sys, time, datetime, re, threading
-import os.path, json, ast, traceback
-
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 
 from electrum.i18n import _
-from electrum.util import print_error, print_msg
 from electrum import DEFAULT_PORTS
 from electrum.network import serialize_server, deserialize_server
 
 from util import *
 
-#protocol_names = ['TCP', 'HTTP', 'SSL', 'HTTPS']
-#protocol_letters = 'thsg'
 protocol_names = ['TCP', 'SSL']
 protocol_letters = 'ts'
 
-class NetworkDialog(QDialog):
+class NetworkDialog(WindowModalDialog):
     def __init__(self, network, config, parent):
-
-        QDialog.__init__(self,parent)
-        self.setModal(1)
-        self.setWindowTitle(_('Network'))
+        WindowModalDialog.__init__(self, parent, _('Network'))
         self.setMinimumSize(375, 20)
 
         self.network = network

gui/qt/password_dialog.py

@@ -23,84 +23,6 @@ from util import *
 import re
 import math
 
-
-
-def make_password_dialog(self, wallet, msg, new_pass=True):
-
-    self.pw = QLineEdit()
-    self.pw.setEchoMode(2)
-    self.new_pw = QLineEdit()
-    self.new_pw.setEchoMode(2)
-    self.conf_pw = QLineEdit()
-    self.conf_pw.setEchoMode(2)
-
-    vbox = QVBoxLayout()
-    label = QLabel(msg)
-    label.setWordWrap(True)
-
-    grid = QGridLayout()
-    grid.setSpacing(8)
-    grid.setColumnMinimumWidth(0, 70)
-    grid.setColumnStretch(1,1)
-
-    logo = QLabel()
-    lockfile = ":icons/lock.png" if wallet and wallet.use_encryption else ":icons/unlock.png"
-    logo.setPixmap(QPixmap(lockfile).scaledToWidth(36))
-    logo.setAlignment(Qt.AlignCenter)
-
-    grid.addWidget(logo,  0, 0)
-    grid.addWidget(label, 0, 1, 1, 2)
-    vbox.addLayout(grid)
-
-    grid = QGridLayout()
-    grid.setSpacing(8)
-    grid.setColumnMinimumWidth(0, 250)
-    grid.setColumnStretch(1,1)
-
-    if wallet and wallet.use_encryption:
-        grid.addWidget(QLabel(_('Password')), 0, 0)
-        grid.addWidget(self.pw, 0, 1)
-
-    grid.addWidget(QLabel(_('New Password') if new_pass else _('Password')), 1, 0)
-    grid.addWidget(self.new_pw, 1, 1)
-
-    grid.addWidget(QLabel(_('Confirm Password')), 2, 0)
-    grid.addWidget(self.conf_pw, 2, 1)
-    vbox.addLayout(grid)
-
-    #Password Strength Label
-    self.pw_strength = QLabel()
-    grid.addWidget(self.pw_strength, 3, 0, 1, 2)
-    self.new_pw.textChanged.connect(lambda: update_password_strength(self.pw_strength, self.new_pw.text()))
-
-    vbox.addStretch(1)
-    vbox.addLayout(Buttons(CancelButton(self), OkButton(self)))
-    return vbox
-
-
-def run_password_dialog(self, wallet, parent):
-
-    if wallet and wallet.is_watching_only():
-        QMessageBox.information(parent, _('Error'), _('This is a watching-only wallet'), _('OK'))
-        return False, None, None
-
-    if not self.exec_():
-        return False, None, None
-
-    password = unicode(self.pw.text()) if wallet and wallet.use_encryption else None
-    new_password = unicode(self.new_pw.text())
-    new_password2 = unicode(self.conf_pw.text())
-
-    if new_password != new_password2:
-        QMessageBox.warning(parent, _('Error'), _('Passwords do not match'), _('OK'))
-        # Retry
-        return run_password_dialog(self, wallet, parent)
-
-    if not new_password:
-        new_password = None
-
-    return True, password, new_password
-
 def check_password_strength(password):
 
     '''
@@ -117,59 +39,89 @@ def check_password_strength(password):
     password_strength = {0:"Weak",1:"Medium",2:"Strong",3:"Very Strong"}
     return password_strength[min(3, int(score))]
 
+class PasswordDialog(WindowModalDialog):
 
-def update_password_strength(pw_strength_label,password):
-
-    '''
-    call the function check_password_strength and update the label pw_strength interactively as the user is typing the password
-    :param pw_strength_label: the label pw_strength
-    :param password: password entered in New Password text box
-    :return: None
-    '''
-    if password:
-        colors = {"Weak":"Red","Medium":"Blue","Strong":"Green", "Very Strong":"Green"}
-        strength = check_password_strength(password)
-        label = _("Password Strength")+ ": "+"<font color=" + colors[strength] + ">" + strength + "</font>"
-    else:
-        label = ""
-    pw_strength_label.setText(label)
-
-
-
-class PasswordDialog(QDialog):
-
-    def __init__(self, wallet, parent):
-        QDialog.__init__(self, parent)
-        self.setModal(1)
+    def __init__(self, parent, wallet, title, msg, new_pass):
+        WindowModalDialog.__init__(self, parent, title)
         self.wallet = wallet
-        self.parent = parent
-        self.setWindowTitle(_("Set Password"))
-        msg = (_('Your wallet is encrypted. Use this dialog to change your password.') + ' '\
-               +_('To disable wallet encryption, enter an empty new password.')) \
-               if wallet.use_encryption else _('Your wallet keys are not encrypted')
-        self.setLayout(make_password_dialog(self, wallet, msg))
 
+        self.pw = QLineEdit()
+        self.pw.setEchoMode(2)
+        self.new_pw = QLineEdit()
+        self.new_pw.setEchoMode(2)
+        self.conf_pw = QLineEdit()
+        self.conf_pw.setEchoMode(2)
+
+        vbox = QVBoxLayout()
+        label = QLabel(msg)
+        label.setWordWrap(True)
+
+        grid = QGridLayout()
+        grid.setSpacing(8)
+        grid.setColumnMinimumWidth(0, 70)
+        grid.setColumnStretch(1,1)
+
+        logo = QLabel()
+        logo.setAlignment(Qt.AlignCenter)
+
+        grid.addWidget(logo,  0, 0)
+        grid.addWidget(label, 0, 1, 1, 2)
+        vbox.addLayout(grid)
+
+        grid = QGridLayout()
+        grid.setSpacing(8)
+        grid.setColumnMinimumWidth(0, 250)
+        grid.setColumnStretch(1,1)
+
+        if wallet and wallet.use_encryption:
+            grid.addWidget(QLabel(_('Password')), 0, 0)
+            grid.addWidget(self.pw, 0, 1)
+            lockfile = ":icons/lock.png"
+        else:
+            self.pw = None
+            lockfile = ":icons/unlock.png"
+        logo.setPixmap(QPixmap(lockfile).scaledToWidth(36))
+
+        grid.addWidget(QLabel(_('New Password') if new_pass else _('Password')), 1, 0)
+        grid.addWidget(self.new_pw, 1, 1)
+
+        grid.addWidget(QLabel(_('Confirm Password')), 2, 0)
+        grid.addWidget(self.conf_pw, 2, 1)
+        vbox.addLayout(grid)
+
+        # Password Strength Label
+        self.pw_strength = QLabel()
+        grid.addWidget(self.pw_strength, 3, 0, 1, 2)
+        self.new_pw.textChanged.connect(self.pw_changed)
+        self.conf_pw.textChanged.connect(self.check_OKButton)
+
+        self.OKButton = OkButton(self)
+        vbox.addStretch(1)
+        vbox.addLayout(Buttons(CancelButton(self), self.OKButton))
+        self.setLayout(vbox)
+
+    def pw_changed(self):
+        password = self.new_pw.text()
+        if password:
+            colors = {"Weak":"Red", "Medium":"Blue", "Strong":"Green",
+                      "Very Strong":"Green"}
+            strength = check_password_strength(password)
+            label = (_("Password Strength") + ": " + "<font color="
+                     + colors[strength] + ">" + strength + "</font>")
+        else:
+            label = ""
+        self.pw_strength.setText(label)
+        self.check_OKButton()
+
+    def check_OKButton(self):
+        self.OKButton.setEnabled(self.new_pw.text() == self.conf_pw.text())
 
     def run(self):
-        ok, password, new_password = run_password_dialog(self, self.wallet, self.parent)
-        if not ok:
-            return
-
-        try:
-            self.wallet.check_password(password)
-        except BaseException as e:
-            QMessageBox.warning(self.parent, _('Error'), str(e), _('OK'))
+        if not self.exec_():
             return False, None, None
 
-        try:
-            self.wallet.update_password(password, new_password)
-        except:
-            import traceback, sys
-            traceback.print_exc(file=sys.stdout)
-            QMessageBox.warning(self.parent, _('Error'), _('Failed to update password'), _('OK'))
-            return
+        password = unicode(self.pw.text()) if self.pw else None
+        new_password = unicode(self.new_pw.text())
+        new_password2 = unicode(self.conf_pw.text())
 
-        if new_password:
-            QMessageBox.information(self.parent, _('Success'), _('Password was updated successfully'), _('OK'))
-        else:
-            QMessageBox.information(self.parent, _('Success'), _('This wallet is not encrypted'), _('OK'))
+        return True, password or None, new_password or None

gui/qt/paytoedit.py

@@ -160,16 +160,8 @@ class PayToEdit(ScanQRTextEdit):
         return len(self.lines()) > 1
 
     def paytomany(self):
-        from electrum.i18n import _
         self.setText("\n\n\n")
         self.update_size()
-        msg = '\n'.join([
-            _('Enter a list of outputs in the \'Pay to\' field.'),
-            _('One output per line.'),
-            _('Format: address, amount.'),
-            _('You may load a CSV file using the file icon.')
-        ])
-        QMessageBox.warning(self, _('Pay to many'), msg, _('OK'))
 
     def update_size(self):
         docHeight = self.document().size().height()

gui/qt/qrcodewidget.py

@@ -1,6 +1,5 @@
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
-import PyQt4.QtCore as QtCore
 import PyQt4.QtGui as QtGui
 
 import os
@@ -9,6 +8,7 @@ import qrcode
 import electrum
 from electrum import bmp
 from electrum.i18n import _
+from util import WindowModalDialog, MessageBoxMixin
 
 
 class QRCodeWidget(QWidget):
@@ -83,13 +83,11 @@ class QRCodeWidget(QWidget):
 
 
 
-class QRDialog(QDialog):
+class QRDialog(WindowModalDialog, MessageBoxMixin):
 
     def __init__(self, data, parent=None, title = "", show_text=False):
-        QDialog.__init__(self, parent)
+        WindowModalDialog.__init__(self, parent, title)
 
-        d = self
-        d.setWindowTitle(title)
         vbox = QVBoxLayout()
         qrw = QRCodeWidget(data)
         vbox.addWidget(qrw, 1)
@@ -107,12 +105,12 @@ class QRDialog(QDialog):
 
             def print_qr():
                 bmp.save_qrcode(qrw.qr, filename)
-                QMessageBox.information(None, _('Message'), _("QR code saved to file") + " " + filename, _('OK'))
+                self.show_message(_("QR code saved to file") + " " + filename)
 
             def copy_to_clipboard():
                 bmp.save_qrcode(qrw.qr, filename)
                 QApplication.clipboard().setImage(QImage(filename))
-                QMessageBox.information(None, _('Message'), _("QR code saved to clipboard"), _('OK'))
+                self.show_message(_("QR code copied to clipboard"))
 
             b = QPushButton(_("Copy"))
             hbox.addWidget(b)
@@ -124,8 +122,8 @@ class QRDialog(QDialog):
 
         b = QPushButton(_("Close"))
         hbox.addWidget(b)
-        b.clicked.connect(d.accept)
+        b.clicked.connect(self.accept)
         b.setDefault(True)
 
         vbox.addLayout(hbox)
-        d.setLayout(vbox)
+        self.setLayout(vbox)

gui/qt/qrtextedit.py

@@ -3,7 +3,7 @@ from electrum.plugins import run_hook
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 
-from util import ButtonsTextEdit
+from util import ButtonsTextEdit, MessageBoxMixin
 
 
 class ShowQRTextEdit(ButtonsTextEdit):
@@ -29,7 +29,7 @@ class ShowQRTextEdit(ButtonsTextEdit):
         m.exec_(e.globalPos())
 
 
-class ScanQRTextEdit(ButtonsTextEdit):
+class ScanQRTextEdit(ButtonsTextEdit, MessageBoxMixin):
 
     def __init__(self, text=""):
         ButtonsTextEdit.__init__(self, text)
@@ -50,8 +50,8 @@ class ScanQRTextEdit(ButtonsTextEdit):
         from electrum import qrscanner, get_config
         try:
             data = qrscanner.scan_qr(get_config())
-        except BaseException, e:
-            QMessageBox.warning(self, _('Error'), _(e), _('OK'))
+        except BaseException as e:
+            self.show_error(str(e))
             return ""
         if type(data) != str:
             return

gui/qt/seed_dialog.py

@@ -20,17 +20,14 @@ from PyQt4.QtGui import *
 from PyQt4.QtCore import *
 import PyQt4.QtCore as QtCore
 from electrum.i18n import _
-from electrum import mnemonic
 
 from util import *
 from qrtextedit import ShowQRTextEdit, ScanQRTextEdit
 
-class SeedDialog(QDialog):
+class SeedDialog(WindowModalDialog):
     def __init__(self, parent, seed, imported_keys):
-        QDialog.__init__(self, parent)
-        self.setModal(1)
+        WindowModalDialog.__init__(self, parent, ('Electrum - ' + _('Seed')))
         self.setMinimumWidth(400)
-        self.setWindowTitle('Electrum' + ' - ' + _('Seed'))
         vbox = show_seed_box_msg(seed)
         if imported_keys:
             vbox.addWidget(QLabel("<b>"+_("WARNING")+":</b> " + _("Your wallet contains imported keys. These keys cannot be recovered from seed.") + "</b><p>"))

gui/qt/transaction_dialog.py

@@ -38,7 +38,7 @@ def show_transaction(tx, parent, desc=None, prompt_if_unsaved=False):
     dialogs.append(d)
     d.show()
 
-class TxDialog(QDialog):
+class TxDialog(QDialog, MessageBoxMixin):
 
     def __init__(self, tx, parent, desc, prompt_if_unsaved):
         '''Transactions in the wallet will show their description.
@@ -54,7 +54,7 @@ class TxDialog(QDialog):
         self.desc = desc
 
         QDialog.__init__(self)
-        self.setMinimumWidth(600)
+        self.setMinimumWidth(660)
         self.setWindowTitle(_("Transaction"))
 
         vbox = QVBoxLayout()
@@ -62,7 +62,7 @@ class TxDialog(QDialog):
 
         vbox.addWidget(QLabel(_("Transaction ID:")))
         self.tx_hash_e  = ButtonsLineEdit()
-        qr_show = lambda: self.parent.show_qrcode(str(self.tx_hash_e.text()), 'Transaction ID')
+        qr_show = lambda: self.parent.show_qrcode(str(self.tx_hash_e.text()), 'Transaction ID', parent=self)
         self.tx_hash_e.addButton(":icons/qrcode.png", qr_show, _("Show as QR code"))
         self.tx_hash_e.setReadOnly(True)
         vbox.addWidget(self.tx_hash_e)
@@ -122,10 +122,7 @@ class TxDialog(QDialog):
 
     def closeEvent(self, event):
         if (self.prompt_if_unsaved and not self.saved and not self.broadcast
-            and QMessageBox.question(
-                self, _('Warning'),
-                _('This transaction is not saved. Close anyway?'),
-                QMessageBox.Yes | QMessageBox.No) == QMessageBox.No):
+            and not self.question(_('This transaction is not saved. Close anyway?'), title=_("Warning"))):
             event.ignore()
         else:
             event.accept()
@@ -135,7 +132,7 @@ class TxDialog(QDialog):
         text = self.tx.raw.decode('hex')
         text = base_encode(text, base=43)
         try:
-            self.parent.show_qrcode(text, 'Transaction')
+            self.parent.show_qrcode(text, 'Transaction', parent=self)
         except Exception as e:
             self.show_message(str(e))
 
@@ -173,7 +170,7 @@ class TxDialog(QDialog):
             status = _("Signed")
 
             if tx_hash in self.wallet.transactions.keys():
-                desc, is_default = self.wallet.get_label(tx_hash)
+                desc = self.wallet.get_label(tx_hash)
                 conf, timestamp = self.wallet.get_confirmations(tx_hash)
                 if timestamp:
                     time_str = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
@@ -249,6 +246,9 @@ class TxDialog(QDialog):
                 return chg if self.wallet.is_change(addr) else rec
             return ext
 
+        def format_amount(amt):
+            return self.parent.format_amount(amt, whitespaces = True)
+
         i_text = QTextEdit()
         i_text.setFont(QFont(MONOSPACE_FONT))
         i_text.setReadOnly(True)
@@ -270,6 +270,8 @@ class TxDialog(QDialog):
                 if addr is None:
                     addr = _('unknown')
                 cursor.insertText(addr, text_format(addr))
+                if x.get('value'):
+                    cursor.insertText(format_amount(x['value']), ext)
             cursor.insertBlock()
 
         vbox.addWidget(i_text)
@@ -283,11 +285,6 @@ class TxDialog(QDialog):
             cursor.insertText(addr, text_format(addr))
             if v is not None:
                 cursor.insertText('\t', ext)
-                cursor.insertText(self.parent.format_amount(v, whitespaces = True), ext)
+                cursor.insertText(format_amount(v), ext)
             cursor.insertBlock()
         vbox.addWidget(o_text)
-
-
-
-    def show_message(self, msg):
-        QMessageBox.information(self, _('Message'), msg, _('OK'))

gui/qt/util.py

@@ -21,51 +21,19 @@ RED_FG = "QWidget {color:red;}"
 BLUE_FG = "QWidget {color:blue;}"
 BLACK_FG = "QWidget {color:black;}"
 
-
-class WaitingDialog(QThread):
-    def __init__(self, parent, message, run_task, on_success=None, on_complete=None):
-        QThread.__init__(self)
-        self.parent = parent
-        self.d = QDialog(parent)
-        self.d.setWindowTitle('Please wait')
-        l = QLabel(message)
-        vbox = QVBoxLayout(self.d)
-        vbox.addWidget(l)
-        self.run_task = run_task
-        self.on_success = on_success
-        self.on_complete = on_complete
-        self.d.connect(self.d, SIGNAL('done'), self.close)
-        self.d.show()
-
-    def run(self):
-        self.error = None
-        try:
-            self.result = self.run_task()
-        except BaseException as e:
-            traceback.print_exc(file=sys.stdout)
-            self.error = str(e)
-        self.d.emit(SIGNAL('done'))
-
-    def close(self):
-        self.d.accept()
-        if self.error:
-            QMessageBox.warning(self.parent, _('Error'), self.error, _('OK'))
-        else:
-            if self.on_success:
-                if type(self.result) is not tuple:
-                    self.result = (self.result,)
-                self.on_success(*self.result)
-
-        if self.on_complete:
-            self.on_complete()
-
+dialogs = []
 
 class Timer(QThread):
+    stopped = False
+
     def run(self):
-        while True:
+        while not self.stopped:
             self.emit(SIGNAL('timersignal'))
             time.sleep(0.5)
 
+    def stop(self):
+        self.stopped = True
+        self.wait()
 
 class EnterButton(QPushButton):
     def __init__(self, text, func):
@@ -187,12 +155,91 @@ class CancelButton(QPushButton):
         QPushButton.__init__(self, label or _("Cancel"))
         self.clicked.connect(dialog.reject)
 
+class MessageBoxMixin:
+    def question(self, msg, parent=None, title=None):
+        Yes, No = QMessageBox.Yes, QMessageBox.No
+        return self.msg_box(QMessageBox.Question, parent or self, title or '',
+                            msg, buttons=Yes|No, defaultButton=No) == Yes
+
+    def show_warning(self, msg, parent=None, title=None):
+        return self.msg_box(QMessageBox.Warning, parent or self,
+                            title or _('Warning'), msg)
+
+    def show_error(self, msg, parent=None):
+        return self.msg_box(QMessageBox.Warning, parent or self,
+                            _('Error'), msg)
+
+    def show_critical(self, msg, parent=None, title=None):
+        return self.msg_box(QMessageBox.Critical, parent or self,
+                            title or _('Critical Error'), msg)
+
+    def show_message(self, msg, parent=None, title=None):
+        return self.msg_box(QMessageBox.Information, parent or self,
+                            title or _('Information'), msg)
+
+    @staticmethod
+    def msg_box(icon, parent, title, text, buttons=QMessageBox.Ok,
+                defaultButton=QMessageBox.NoButton):
+        # handle e.g. ElectrumGui
+        if not isinstance(parent, QWidget):
+            parent = None
+        d = QMessageBox(icon, title, text, buttons, parent)
+        d.setWindowModality(Qt.WindowModal)
+        d.setDefaultButton(defaultButton)
+        return d.exec_()
+
+class WindowModalDialog(QDialog):
+    '''Handy wrapper; window modal dialogs are better for our multi-window
+    daemon model as other wallet windows can still be accessed.'''
+    def __init__(self, parent, title=None):
+        QDialog.__init__(self, parent)
+        self.setWindowModality(Qt.WindowModal)
+        if title:
+            self.setWindowTitle(title)
+
+class WaitingDialog(QThread, MessageBoxMixin):
+    '''Shows a please wait dialog whilst runnning a task.  It is not
+    necessary to maintain a reference to this dialog.'''
+    def __init__(self, parent, message, task, on_success=None,
+                 on_finished=None):
+        global dialogs
+        dialogs.append(self) # Prevent GC
+        QThread.__init__(self)
+        self.task = task
+        self.on_success = on_success
+        self.on_finished = on_finished
+        self.dialog = WindowModalDialog(parent, _("Please wait"))
+        vbox = QVBoxLayout(self.dialog)
+        vbox.addWidget(QLabel(message))
+        self.dialog.show()
+        self.dialog.connect(self, SIGNAL("finished()"), self.finished)
+        self.start()
+
+    def run(self):
+        self.error = None
+        try:
+            self.result = self.task()
+        except BaseException as e:
+            traceback.print_exc(file=sys.stdout)
+            self.error = str(e)
+
+    def finished(self):
+        global dialogs
+        dialogs.remove(self)
+        if self.error:
+            self.show_error(self.error, parent=self.dialog.parent())
+        elif self.on_success:
+            result = self.result
+            if type(result) is not tuple:
+                result = (result,)
+            self.on_success(*result)
+        if self.on_finished:
+            self.on_finished()
+        self.dialog.accept()
 
 def line_dialog(parent, title, label, ok_label, default=None):
-    dialog = QDialog(parent)
+    dialog = WindowModalDialog(parent, title)
     dialog.setMinimumWidth(500)
-    dialog.setWindowTitle(title)
-    dialog.setModal(1)
     l = QVBoxLayout()
     dialog.setLayout(l)
     l.addWidget(QLabel(label))
@@ -206,10 +253,8 @@ def line_dialog(parent, title, label, ok_label, default=None):
 
 def text_dialog(parent, title, label, ok_label, default=None):
     from qrtextedit import ScanQRTextEdit
-    dialog = QDialog(parent)
+    dialog = WindowModalDialog(parent, title)
     dialog.setMinimumWidth(500)
-    dialog.setWindowTitle(title)
-    dialog.setModal(1)
     l = QVBoxLayout()
     dialog.setLayout(l)
     l.addWidget(QLabel(label))
@@ -221,9 +266,6 @@ def text_dialog(parent, title, label, ok_label, default=None):
     if dialog.exec_():
         return unicode(txt.toPlainText())
 
-def question(msg):
-    return QMessageBox.question(None, _('Message'), msg, QMessageBox.Yes | QMessageBox.No, QMessageBox.No) == QMessageBox.Yes
-
 def address_field(addresses):
     hbox = QHBoxLayout()
     address_e = QLineEdit()
@@ -383,12 +425,6 @@ class MyTreeWidget(QTreeWidget):
         key = str(item.data(0, Qt.UserRole).toString())
         text = unicode(item.text(column))
         self.parent.wallet.set_label(key, text)
-        if text:
-            item.setForeground(column, QBrush(QColor('black')))
-        else:
-            text = self.parent.wallet.get_default_label(key)
-            item.setText(column, text)
-            item.setForeground(column, QBrush(QColor('gray')))
         self.parent.history_list.update()
         self.parent.update_completions()
 

gui/stdio.py

@@ -96,7 +96,7 @@ class ElectrumGui:
             else:
                 time_str = 'pending'
 
-            label, is_default_label = self.wallet.get_label(tx_hash)
+            label = self.wallet.get_label(tx_hash)
             messages.append( format_str%( time_str, label, format_satoshis(value, whitespaces=True), format_satoshis(balance, whitespaces=True) ) )
 
         self.print_list(messages[::-1], format_str%( _("Date"), _("Description"), _("Amount"), _("Balance")))

gui/text.py

@@ -116,7 +116,7 @@ class ElectrumGui:
             else:
                 time_str = 'pending'
 
-            label, is_default_label = self.wallet.get_label(tx_hash)
+            label = self.wallet.get_label(tx_hash)
             if len(label) > 40:
                 label = label[0:37] + '...'
             self.history.append( format_str%( time_str, label, format_satoshis(value, whitespaces=True), format_satoshis(balance, whitespaces=True) ) )

lib/blockchain.py

@@ -21,13 +21,14 @@ import os
 import util
 from bitcoin import *
 
+MAX_TARGET = 0x00000000FFFF0000000000000000000000000000000000000000000000000000
 
 class Blockchain(util.PrintError):
     '''Manages blockchain headers and their verification'''
     def __init__(self, config, network):
         self.config = config
         self.network = network
-        self.headers_url = 'https://headers.electrum.org/blockchain_headers'
+        self.headers_url = "https://headers.electrum.org/blockchain_headers"
         self.local_height = 0
         self.set_local_height()
 
@@ -39,76 +40,44 @@ class Blockchain(util.PrintError):
         self.set_local_height()
         self.print_error("%d blocks" % self.local_height)
 
+    def verify_header(self, header, prev_header, bits, target):
+        prev_hash = self.hash_header(prev_header)
+        assert prev_hash == header.get('prev_block_hash'), "prev hash mismatch: %s vs %s" % (prev_hash, header.get('prev_block_hash'))
+        assert bits == header.get('bits'), "bits mismatch: %s vs %s" % (bits, header.get('bits'))
+        _hash = self.hash_header(header)
+        assert int('0x' + _hash, 16) <= target, "insufficient proof of work: %s vs target %s" % (int('0x' + _hash, 16), target)
+
     def verify_chain(self, chain):
         first_header = chain[0]
-        prev_header = self.read_header(first_header.get('block_height') -1)
-
+        prev_header = self.read_header(first_header.get('block_height') - 1)
         for header in chain:
             height = header.get('block_height')
-            prev_hash = self.hash_header(prev_header)
-            if prev_hash != header.get('prev_block_hash'):
-                self.print_error("prev hash mismatch: %s vs %s"
-                                 % (prev_hash, header.get('prev_block_hash')))
-                return False
-            bits, target = self.get_target(height/2016, chain)
-            if bits != header.get('bits'):
-                self.print_error("bits mismatch: %s vs %s"
-                                 % (bits, header.get('bits')))
-                return False
-            _hash = self.hash_header(header)
-            if int('0x'+_hash, 16) > target:
-                self.print_error("insufficient proof of work: %s vs target %s"
-                                 % (int('0x'+_hash, 16), target))
-                return False
-
+            bits, target = self.get_target(height / 2016, chain)
+            self.verify_header(header, prev_header, bits, target)
             prev_header = header
 
-        return True
-
-
-
-    def verify_chunk(self, index, hexdata):
-        data = hexdata.decode('hex')
-        height = index*2016
-        num = len(data)/80
-
-        if index == 0:
-            previous_hash = ("0"*64)
-        else:
-            prev_header = self.read_header(index*2016-1)
-            if prev_header is None: raise
-            previous_hash = self.hash_header(prev_header)
-
+    def verify_chunk(self, index, data):
+        num = len(data) / 80
+        prev_header = None
+        if index != 0:
+            prev_header = self.read_header(index*2016 - 1)
         bits, target = self.get_target(index)
-
         for i in range(num):
-            height = index*2016 + i
-            raw_header = data[i*80:(i+1)*80]
-            header = self.header_from_string(raw_header)
-            _hash = self.hash_header(header)
-            assert previous_hash == header.get('prev_block_hash')
-            assert bits == header.get('bits')
-            assert int('0x'+_hash,16) < target
+            raw_header = data[i*80:(i+1) * 80]
+            header = self.deserialize_header(raw_header)
+            self.verify_header(header, prev_header, bits, target)
+            prev_header = header
 
-            previous_header = header
-            previous_hash = _hash
-
-        self.save_chunk(index, data)
-        self.print_error("validated chunk %d to height %d" % (index, height))
-
-
-
-    def header_to_string(self, res):
-        s = int_to_hex(res.get('version'),4) \
+    def serialize_header(self, res):
+        s = int_to_hex(res.get('version'), 4) \
             + rev_hex(res.get('prev_block_hash')) \
             + rev_hex(res.get('merkle_root')) \
-            + int_to_hex(int(res.get('timestamp')),4) \
-            + int_to_hex(int(res.get('bits')),4) \
-            + int_to_hex(int(res.get('nonce')),4)
+            + int_to_hex(int(res.get('timestamp')), 4) \
+            + int_to_hex(int(res.get('bits')), 4) \
+            + int_to_hex(int(res.get('nonce')), 4)
         return s
 
-
-    def header_from_string(self, s):
+    def deserialize_header(self, s):
         hex_to_int = lambda s: int('0x' + s[::-1].encode('hex'), 16)
         h = {}
         h['version'] = hex_to_int(s[0:4])
@@ -120,7 +89,9 @@ class Blockchain(util.PrintError):
         return h
 
     def hash_header(self, header):
-        return rev_hex(Hash(self.header_to_string(header).decode('hex')).encode('hex'))
+        if header is None:
+            return '0' * 64
+        return hash_encode(Hash(self.serialize_header(header).decode('hex')))
 
     def path(self):
         return os.path.join(self.config.path, 'blockchain_headers')
@@ -132,28 +103,28 @@ class Blockchain(util.PrintError):
         try:
             import urllib, socket
             socket.setdefaulttimeout(30)
-            self.print_error("downloading ", self.headers_url )
+            self.print_error("downloading ", self.headers_url)
             urllib.urlretrieve(self.headers_url, filename)
             self.print_error("done.")
         except Exception:
-            self.print_error( "download failed. creating file", filename )
-            open(filename,'wb+').close()
+            self.print_error("download failed. creating file", filename)
+            open(filename, 'wb+').close()
 
     def save_chunk(self, index, chunk):
         filename = self.path()
-        f = open(filename,'rb+')
-        f.seek(index*2016*80)
+        f = open(filename, 'rb+')
+        f.seek(index * 2016 * 80)
         h = f.write(chunk)
         f.close()
         self.set_local_height()
 
     def save_header(self, header):
-        data = self.header_to_string(header).decode('hex')
+        data = self.serialize_header(header).decode('hex')
         assert len(data) == 80
         height = header.get('block_height')
         filename = self.path()
-        f = open(filename,'rb+')
-        f.seek(height*80)
+        f = open(filename, 'rb+')
+        f.seek(height * 80)
         h = f.write(data)
         f.close()
         self.set_local_height()
@@ -168,58 +139,47 @@ class Blockchain(util.PrintError):
     def read_header(self, block_height):
         name = self.path()
         if os.path.exists(name):
-            f = open(name,'rb')
-            f.seek(block_height*80)
+            f = open(name, 'rb')
+            f.seek(block_height * 80)
             h = f.read(80)
             f.close()
             if len(h) == 80:
-                h = self.header_from_string(h)
+                h = self.deserialize_header(h)
                 return h
 
     def get_target(self, index, chain=None):
-        if chain is None:
-            chain = []  # Do not use mutables as default values!
-
-        max_target = 0x00000000FFFF0000000000000000000000000000000000000000000000000000
-        if index == 0: return 0x1d00ffff, max_target
-
-        first = self.read_header((index-1)*2016)
-        last = self.read_header(index*2016-1)
+        if index == 0:
+            return 0x1d00ffff, MAX_TARGET
+        first = self.read_header((index-1) * 2016)
+        last = self.read_header(index*2016 - 1)
         if last is None:
             for h in chain:
-                if h.get('block_height') == index*2016-1:
+                if h.get('block_height') == index*2016 - 1:
                     last = h
-
-        nActualTimespan = last.get('timestamp') - first.get('timestamp')
-        nTargetTimespan = 14*24*60*60
-        nActualTimespan = max(nActualTimespan, nTargetTimespan/4)
-        nActualTimespan = min(nActualTimespan, nTargetTimespan*4)
-
+        assert last is not None
+        # bits to target
         bits = last.get('bits')
-        # convert to bignum
-        MM = 256*256*256
-        a = bits%MM
-        if a < 0x8000:
-            a *= 256
-        target = (a) * pow(2, 8 * (bits/MM - 3))
-
+        bitsN = (bits >> 24) & 0xff
+        assert bitsN >= 0x03 and bitsN <= 0x1d, "First part of bits should be in [0x03, 0x1d]"
+        bitsBase = bits & 0xffffff
+        assert bitsBase >= 0x8000 and bitsBase <= 0x7fffff, "Second part of bits should be in [0x8000, 0x7fffff]"
+        target = bitsBase << (8 * (bitsN-3))
         # new target
-        new_target = min( max_target, (target * nActualTimespan)/nTargetTimespan )
-
-        # convert it to bits
-        c = ("%064X"%new_target)[2:]
-        i = 31
-        while c[0:2]=="00":
+        nActualTimespan = last.get('timestamp') - first.get('timestamp')
+        nTargetTimespan = 14 * 24 * 60 * 60
+        nActualTimespan = max(nActualTimespan, nTargetTimespan / 4)
+        nActualTimespan = min(nActualTimespan, nTargetTimespan * 4)
+        new_target = min(MAX_TARGET, (target*nActualTimespan) / nTargetTimespan)
+        # convert new target to bits
+        c = ("%064x" % new_target)[2:]
+        while c[:2] == '00' and len(c) > 6:
             c = c[2:]
-            i -= 1
-
-        c = int('0x'+c[0:6],16)
-        if c >= 0x800000:
-            c /= 256
-            i += 1
-
-        new_bits = c + MM * i
-        return new_bits, new_target
+        bitsN, bitsBase = len(c) / 2, int('0x' + c[:6], 16)
+        if bitsBase >= 0x800000:
+            bitsN += 1
+            bitsBase >>= 8
+        new_bits = bitsN << 24 | bitsBase
+        return new_bits, bitsBase << (8 * (bitsN-3))
 
     def connect_header(self, chain, header):
         '''Builds a header chain until it connects.  Returns True if it has
@@ -241,18 +201,23 @@ class Blockchain(util.PrintError):
 
         # The chain is complete.  Reverse to order by increasing height
         chain.reverse()
-        if self.verify_chain(chain):
+        try:
+            self.verify_chain(chain)
             self.print_error("connected at height:", previous_height)
             for header in chain:
                 self.save_header(header)
             return True
+        except BaseException as e:
+            self.print_error(str(e))
+            return False
 
-        return False
-
-    def connect_chunk(self, idx, chunk):
+    def connect_chunk(self, idx, hexdata):
         try:
-            self.verify_chunk(idx, chunk)
+            data = hexdata.decode('hex')
+            self.verify_chunk(idx, data)
+            self.print_error("validated chunk %d" % idx)
+            self.save_chunk(idx, data)
             return idx + 1
-        except Exception:
-            self.print_error('verify_chunk failed')
+        except BaseException as e:
+            self.print_error('verify_chunk failed', str(e))
             return idx - 1

lib/coinchooser.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python
 #
 # Electrum - lightweight Bitcoin client
-# Copyright (C) 2011 thomasv@gitorious
+# Copyright (C) 2015 kyuupichan@gmail
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,7 +17,8 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from collections import defaultdict, namedtuple
-from random import shuffle
+from random import choice, randint, shuffle
+from math import floor, log10
 
 from bitcoin import COIN
 from transaction import Transaction
@@ -25,6 +26,15 @@ from util import NotEnoughFunds, PrintError, profiler
 
 Bucket = namedtuple('Bucket', ['desc', 'size', 'value', 'coins'])
 
+def strip_unneeded(bkts, sufficient_funds):
+    '''Remove buckets that are unnecessary in achieving the spend amount'''
+    bkts = sorted(bkts, key = lambda bkt: bkt.value)
+    for i in range(len(bkts)):
+        if not sufficient_funds(bkts[i + 1:]):
+            return bkts[i:]
+    # Shouldn't get here
+    return bkts
+
 class CoinChooserBase(PrintError):
 
     def keys(self, coins):
@@ -49,17 +59,25 @@ class CoinChooserBase(PrintError):
             return 0
         return penalty
 
-    def add_change(self, tx, change_addrs, fee_estimator, dust_threshold):
-        # How much is left if we add 1 change output?
-        change_amount = tx.get_fee() - fee_estimator(1)
+    def change_amounts(self, tx, count, fee_estimator, dust_threshold):
+        # The amount left after adding 1 change output
+        return [max(0, tx.get_fee() - fee_estimator(1))]
 
+    def change_outputs(self, tx, change_addrs, fee_estimator, dust_threshold):
+        amounts = self.change_amounts(tx, len(change_addrs), fee_estimator,
+                                      dust_threshold)
+        assert min(amounts) >= 0
+        assert len(change_addrs) >= len(amounts)
         # If change is above dust threshold after accounting for the
         # size of the change output, add it to the transaction.
-        if change_amount > dust_threshold:
-            tx.outputs.append(('address', change_addrs[0], change_amount))
-            self.print_error('change', change_amount)
-        elif change_amount:
-            self.print_error('not keeping dust', change_amount)
+        dust = sum(amount for amount in amounts if amount < dust_threshold)
+        amounts = [amount for amount in amounts if amount >= dust_threshold]
+        change = [('address', addr, amount)
+                  for addr, amount in zip(change_addrs, amounts)]
+        self.print_error('change:', change)
+        if dust:
+            self.print_error('not keeping dust', dust)
+        return change
 
     def make_tx(self, coins, outputs, change_addrs, fee_estimator,
                 dust_threshold):
@@ -72,12 +90,18 @@ class CoinChooserBase(PrintError):
         tx = Transaction.from_io([], outputs[:])
         # Size of the transaction with no inputs and no change
         base_size = tx.estimated_size()
-        # Returns fee given input size
-        fee = lambda input_size: fee_estimator(base_size + input_size)
+        spent_amount = tx.output_value()
+
+        def sufficient_funds(buckets):
+            '''Given a list of buckets, return True if it has enough
+            value to pay for the transaction'''
+            total_input = sum(bucket.value for bucket in buckets)
+            total_size = sum(bucket.size for bucket in buckets) + base_size
+            return total_input >= spent_amount + fee_estimator(total_size)
 
         # Collect the coins into buckets, choose a subset of the buckets
         buckets = self.bucketize_coins(coins)
-        buckets = self.choose_buckets(buckets, tx.output_value(), fee,
+        buckets = self.choose_buckets(buckets, sufficient_funds,
                                       self.penalty_func(tx))
 
         tx.inputs = [coin for b in buckets for coin in b.coins]
@@ -86,50 +110,37 @@ class CoinChooserBase(PrintError):
         # This takes a count of change outputs and returns a tx fee;
         # each pay-to-bitcoin-address output serializes as 34 bytes
         fee = lambda count: fee_estimator(tx_size + count * 34)
-        self.add_change(tx, change_addrs, fee, dust_threshold)
+        change = self.change_outputs(tx, change_addrs, fee, dust_threshold)
+        tx.outputs.extend(change)
 
         self.print_error("using %d inputs" % len(tx.inputs))
         self.print_error("using buckets:", [bucket.desc for bucket in buckets])
 
         return tx
 
-class CoinChooserClassic(CoinChooserBase):
-    '''
-    The classic electrum algorithm.  Chooses coins starting with
-    the oldest that are sufficient to cover the spent amount, and
-    then removes any unneeded starting with the smallest in value.'''
+class CoinChooserOldestFirst(CoinChooserBase):
+    '''The classic electrum algorithm.  Chooses coins starting with the
+    oldest that are sufficient to cover the spent amount, and then
+    removes any unneeded starting with the smallest in value.'''
 
     def keys(self, coins):
         return [coin['prevout_hash'] + ':' + str(coin['prevout_n'])
                 for coin in coins]
 
-    def choose_buckets(self, buckets, spent_amount, fee, penalty_func):
+    def choose_buckets(self, buckets, sufficient_funds, penalty_func):
         '''Spend the oldest buckets first.'''
         # Unconfirmed coins are young, not old
         adj_height = lambda height: 99999999 if height == 0 else height
         buckets.sort(key = lambda b: max(adj_height(coin['height'])
                                          for coin in b.coins))
-        selected, value, size = [], 0, 0
+        selected = []
         for bucket in buckets:
             selected.append(bucket)
-            value += bucket.value
-            size += bucket.size
-            if value >= spent_amount + fee(size):
-                break
+            if sufficient_funds(selected):
+                return strip_unneeded(selected, sufficient_funds)
         else:
             raise NotEnoughFunds()
 
-        # Remove unneeded inputs starting with the smallest.
-        selected.sort(key = lambda b: b.value)
-        dropped = []
-        for bucket in selected:
-            if value - bucket.value >= spent_amount + fee(size - bucket.size):
-                value -= bucket.value
-                size -= bucket.size
-                dropped.append(bucket)
-
-        return [bucket for bucket in selected if bucket not in dropped]
-
 class CoinChooserRandom(CoinChooserBase):
 
     def bucket_candidates(self, buckets, sufficient_funds):
@@ -157,18 +168,11 @@ class CoinChooserRandom(CoinChooserBase):
             else:
                 raise NotEnoughFunds()
 
-        return [[buckets[n] for n in candidate] for candidate in candidates]
+        candidates = [[buckets[n] for n in c] for c in candidates]
+        return [strip_unneeded(c, sufficient_funds) for c in candidates]
 
-    def choose_buckets(self, buckets, spent_amount, fee, penalty_func):
-
-        def sufficient(buckets):
-            '''Given a set of buckets, return True if it has enough
-            value to pay for the transaction'''
-            total_input = sum(bucket.value for bucket in buckets)
-            total_size = sum(bucket.size for bucket in buckets)
-            return total_input >= spent_amount + fee(total_size)
-
-        candidates = self.bucket_candidates(buckets, sufficient)
+    def choose_buckets(self, buckets, sufficient_funds, penalty_func):
+        candidates = self.bucket_candidates(buckets, sufficient_funds)
         penalties = [penalty_func(cand) for cand in candidates]
         winner = candidates[penalties.index(min(penalties))]
         self.print_error("Bucket sets:", len(buckets))
@@ -176,15 +180,19 @@ class CoinChooserRandom(CoinChooserBase):
         return winner
 
 class CoinChooserPrivacy(CoinChooserRandom):
-    '''
-    Attempts to better preserve user privacy.  First, if any coin is
+    '''Attempts to better preserve user privacy.  First, if any coin is
     spent from a user address, all coins are.  Compared to spending
     from other addresses to make up an amount, this reduces
     information leakage about sender holdings.  It also helps to
-    reduce blockchain UTXO bloat, and reduce future privacy loss
-    that would come from reusing that address' remaining UTXOs.
-    Second, it penalizes change that is quite different to the sent
-    amount.  Third, it penalizes change that is too big.'''
+    reduce blockchain UTXO bloat, and reduce future privacy loss that
+    would come from reusing that address' remaining UTXOs.  Second, it
+    penalizes change that is quite different to the sent amount.
+    Third, it penalizes change that is too big. Fourth, it breaks
+    large change up into amounts comparable to the spent amount.
+    Finally, change is rounded to similar precision to sent amounts.
+    Extra change outputs and rounding might raise the transaction fee
+    slightly.  Transaction priority might be less than if older coins
+    were chosen.'''
 
     def keys(self, coins):
         return [coin['address'] for coin in coins]
@@ -213,5 +221,52 @@ class CoinChooserPrivacy(CoinChooserRandom):
 
         return penalty
 
-COIN_CHOOSERS = {'Classic': CoinChooserClassic,
+    def change_amounts(self, tx, count, fee_estimator, dust_threshold):
+
+        # Break change up if bigger than max_change
+        output_amounts = [o[2] for o in tx.outputs]
+        max_change = max(max(output_amounts) * 1.25, dust_threshold * 10)
+
+        # Use N change outputs
+        for n in range(1, count + 1):
+            # How much is left if we add this many change outputs?
+            change_amount = max(0, tx.get_fee() - fee_estimator(n))
+            if change_amount // n <= max_change:
+                break
+
+        # Get a handle on the precision of the output amounts; round our
+        # change to look similar
+        def trailing_zeroes(val):
+            s = str(val)
+            return len(s) - len(s.rstrip('0'))
+
+        zeroes = map(trailing_zeroes, output_amounts)
+        min_zeroes = min(zeroes)
+        max_zeroes = max(zeroes)
+        zeroes = range(max(0, min_zeroes - 1), (max_zeroes + 1) + 1)
+
+        # Calculate change; randomize it a bit if using more than 1 output
+        remaining = change_amount
+        amounts = []
+        while n > 1:
+            average = remaining // n
+            amount = randint(int(average * 0.7), int(average * 1.3))
+            precision = min(choice(zeroes), int(floor(log10(amount))))
+            amount = int(round(amount, -precision))
+            amounts.append(amount)
+            remaining -= amount
+            n -= 1
+
+        # Last change output.  Round down to maximum precision but lose
+        # no more than 100 satoshis to fees (2dp)
+        N = pow(10, min(2, zeroes[0]))
+        amount = (remaining // N) * N
+        amounts.append(amount)
+
+        assert sum(amounts) <= change_amount
+
+        return amounts
+
+
+COIN_CHOOSERS = {'Oldest First': CoinChooserOldestFirst,
                  'Privacy': CoinChooserPrivacy}

lib/commands.py

@@ -74,21 +74,22 @@ def command(s):
 
 class Commands:
 
-    def __init__(self, config, wallet, network, callback = None):
+    def __init__(self, config, wallet, network, callback = None, password=None, new_password=None):
         self.config = config
         self.wallet = wallet
         self.network = network
         self._callback = callback
-        self.password = None
+        self._password = password
+        self.new_password = new_password
         self.contacts = contacts.Contacts(self.config)
 
     def _run(self, method, args, password_getter):
         cmd = known_commands[method]
         if cmd.requires_password and self.wallet.use_encryption:
-            self.password = apply(password_getter,())
+            self._password = apply(password_getter,())
         f = getattr(self, method)
         result = f(*args)
-        self.password = None
+        self._password = None
         if self._callback:
             apply(self._callback, ())
         return result
@@ -120,7 +121,9 @@ class Commands:
     @command('wp')
     def password(self):
         """Change wallet password. """
-        raise BaseException('Not a JSON-RPC command')
+        self.wallet.update_password(self._password, self.new_password)
+        self.wallet.storage.write()
+        return {'password':self.wallet.use_encryption}
 
     @command('')
     def getconfig(self, key):
@@ -157,7 +160,7 @@ class Commands:
         """
         return self.network.synchronous_get(('blockchain.address.get_history', [address]))
 
-    @command('nw')
+    @command('w')
     def listunspent(self):
         """List unspent outputs. Returns the list of unspent transaction
         outputs in your wallet."""
@@ -200,7 +203,7 @@ class Commands:
         outputs = map(lambda x: ('address', x[0], int(COIN*x[1])), outputs.items())
         tx = Transaction.from_io(tx_inputs, outputs)
         if not unsigned:
-            self.wallet.sign_transaction(tx, self.password)
+            self.wallet.sign_transaction(tx, self._password)
         return tx.as_dict()
 
     @command('wp')
@@ -212,7 +215,7 @@ class Commands:
             pubkey = bitcoin.public_key_from_private_key(privkey)
             t.sign({pubkey:privkey})
         else:
-            self.wallet.sign_transaction(t, self.password)
+            self.wallet.sign_transaction(t, self._password)
         return t.as_dict()
 
     @command('')
@@ -250,7 +253,7 @@ class Commands:
         """Get private keys of addresses. You may pass a single wallet address, or a list of wallet addresses."""
         is_list = type(address) is list
         domain = address if is_list else [address]
-        out = [self.wallet.get_private_key(address, self.password) for address in domain]
+        out = [self.wallet.get_private_key(address, self._password) for address in domain]
         return out if is_list else out[0]
 
     @command('w')
@@ -273,10 +276,9 @@ class Commands:
         """Return the public keys for a wallet address. """
         return self.wallet.get_public_keys(address)
 
-    @command('nw')
+    @command('w')
     def getbalance(self, account=None):
-        """Return the balance of your wallet. If run with the --offline flag,
-        returns the last known balance."""
+        """Return the balance of your wallet. """
         if account is None:
             c, u, x = self.wallet.get_balance()
         else:
@@ -334,19 +336,19 @@ class Commands:
     @command('wp')
     def getmasterprivate(self):
         """Get master private key. Return your wallet\'s master private key"""
-        return str(self.wallet.get_master_private_key(self.wallet.root_name, self.password))
+        return str(self.wallet.get_master_private_key(self.wallet.root_name, self._password))
 
     @command('wp')
     def getseed(self):
         """Get seed phrase. Print the generation seed of your wallet."""
-        s = self.wallet.get_mnemonic(self.password)
+        s = self.wallet.get_mnemonic(self._password)
         return s.encode('utf8')
 
     @command('wp')
     def importprivkey(self, privkey):
         """Import a private key. """
         try:
-            addr = self.wallet.import_key(privkey, self.password)
+            addr = self.wallet.import_key(privkey, self._password)
             out = "Keypair imported: " + addr
         except Exception as e:
             out = "Error: " + str(e)
@@ -377,7 +379,7 @@ class Commands:
     def signmessage(self, address, message):
         """Sign a message with a key. Use quotes if your message contains
         whitespaces"""
-        sig = self.wallet.sign_message(address, message, self.password)
+        sig = self.wallet.sign_message(address, message, self._password)
         return base64.b64encode(sig)
 
     @command('')
@@ -415,24 +417,24 @@ class Commands:
         tx = self.wallet.make_unsigned_transaction(coins, final_outputs, self.config, fee, change_addr)
         str(tx) #this serializes
         if not unsigned:
-            self.wallet.sign_transaction(tx, self.password)
+            self.wallet.sign_transaction(tx, self._password)
         return tx
 
-    @command('wpn')
+    @command('wp')
     def payto(self, destination, amount, tx_fee=None, from_addr=None, change_addr=None, nocheck=False, unsigned=False):
         """Create a transaction. """
         domain = [from_addr] if from_addr else None
         tx = self._mktx([(destination, amount)], tx_fee, change_addr, domain, nocheck, unsigned)
         return tx.as_dict()
 
-    @command('wpn')
+    @command('wp')
     def paytomany(self, outputs, tx_fee=None, from_addr=None, change_addr=None, nocheck=False, unsigned=False):
         """Create a multi-output transaction. """
         domain = [from_addr] if from_addr else None
         tx = self._mktx(outputs, tx_fee, change_addr, domain, nocheck, unsigned)
         return tx.as_dict()
 
-    @command('wn')
+    @command('w')
     def history(self):
         """Wallet history. Returns the transaction history of your wallet."""
         balance = 0
@@ -443,7 +445,7 @@ class Commands:
                 time_str = datetime.datetime.fromtimestamp(timestamp).isoformat(' ')[:-3]
             except Exception:
                 time_str = "----"
-            label, is_default_label = self.wallet.get_label(tx_hash)
+            label = self.wallet.get_label(tx_hash)
             out.append({
                 'txid':tx_hash,
                 'timestamp':timestamp,
@@ -502,7 +504,7 @@ class Commands:
             out.append(item)
         return out
 
-    @command('nw')
+    @command('w')
     def gettransaction(self, txid):
         """Retrieve a transaction. """
         tx = self.wallet.transactions.get(txid) if self.wallet else None
@@ -522,7 +524,7 @@ class Commands:
     @command('wp')
     def decrypt(self, pubkey, encrypted):
         """Decrypt a message encrypted with a public key."""
-        return self.wallet.decrypt_message(pubkey, encrypted, self.password)
+        return self.wallet.decrypt_message(pubkey, encrypted, self._password)
 
     def _format_request(self, out):
         pr_str = {
@@ -535,7 +537,7 @@ class Commands:
         out['status'] = pr_str[out.get('status', PR_UNKNOWN)]
         return out
 
-    @command('wn')
+    @command('w')
     def getrequest(self, key):
         """Return a payment request"""
         r = self.wallet.get_payment_request(key, self.config)
@@ -548,7 +550,7 @@ class Commands:
     #    """<Not implemented>"""
     #    pass
 
-    @command('wn')
+    @command('w')
     def listrequests(self, pending=False, expired=False, paid=False):
         """List the payment requests you made."""
         out = self.wallet.get_sorted_requests(self.config)
@@ -565,7 +567,7 @@ class Commands:
         return map(self._format_request, out)
 
     @command('w')
-    def addrequest(self, requested_amount, memo='', expiration=60*60, force=False):
+    def addrequest(self, amount, memo='', expiration=60*60, force=False):
         """Create a payment request."""
         addr = self.wallet.get_unused_address(None)
         if addr is None:
@@ -573,7 +575,7 @@ class Commands:
                 addr = self.wallet.create_new_address(None, False)
             else:
                 return False
-        amount = int(Decimal(requested_amount)*COIN)
+        amount = int(COIN*Decimal(amount))
         expiration = int(expiration)
         req = self.wallet.make_payment_request(addr, amount, memo, expiration)
         self.wallet.add_payment_request(req, self.config)
@@ -587,7 +589,7 @@ class Commands:
         if not alias:
             raise BaseException('No alias in your configuration')
         alias_addr = self.contacts.resolve(alias)['address']
-        self.wallet.sign_payment_request(address, alias, alias_addr, self.password)
+        self.wallet.sign_payment_request(address, alias, alias_addr, self._password)
 
     @command('w')
     def rmrequest(self, address):
@@ -664,15 +666,18 @@ command_options = {
 }
 
 
+# don't use floats because of rounding errors
+json_loads = lambda x: json.loads(x, parse_float=lambda x: str(Decimal(x)))
 arg_types = {
-    'num':int,
-    'nbits':int,
-    'entropy':long,
-    'pubkeys': json.loads,
-    'inputs': json.loads,
-    'outputs': json.loads,
-    'tx_fee': lambda x: float(x) if x is not None else None,
-    'amount': lambda x: float(x) if x!='!' else '!',
+    'num': int,
+    'nbits': int,
+    'entropy': long,
+    'tx': json_loads,
+    'pubkeys': json_loads,
+    'inputs': json_loads,
+    'outputs': json_loads,
+    'tx_fee': lambda x: str(Decimal(x)) if x is not None else None,
+    'amount': lambda x: str(Decimal(x)) if x!='!' else '!',
 }
 
 config_variables = {
@@ -728,7 +733,6 @@ def get_parser():
     group.add_argument("-v", "--verbose", action="store_true", dest="verbose", default=False, help="Show debugging information")
     group.add_argument("-P", "--portable", action="store_true", dest="portable", default=False, help="Use local 'electrum_data' directory")
     group.add_argument("-w", "--wallet", dest="wallet_path", help="wallet path")
-    group.add_argument("-o", "--offline", action="store_true", dest="offline", default=False, help="Run offline")
     # create main parser
     parser = argparse.ArgumentParser(
         parents=[parent_parser],
@@ -739,6 +743,7 @@ def get_parser():
     parser_gui.add_argument("url", nargs='?', default=None, help="bitcoin URI (or bip70 file)")
     #parser_gui.set_defaults(func=run_gui)
     parser_gui.add_argument("-g", "--gui", dest="gui", help="select graphical user interface", choices=['qt', 'lite', 'gtk', 'kivy', 'text', 'stdio', 'jsonrpc'])
+    parser_gui.add_argument("-o", "--offline", action="store_true", dest="offline", default=False, help="Run offline")
     parser_gui.add_argument("-m", action="store_true", dest="hide_gui", default=False, help="hide GUI on startup")
     parser_gui.add_argument("-L", "--lang", dest="language", default=None, help="default language used in GUI")
     add_network_options(parser_gui)

lib/daemon.py

@@ -103,7 +103,7 @@ class Daemon(DaemonThread):
                 'nodes': self.network.get_interfaces(),
                 'connected': self.network.is_connected(),
                 'auto_connect': p[4],
-                'wallets': self.wallets.keys(),
+                'wallets': dict([ (k, w.is_up_to_date()) for k, w in self.wallets.items()]),
             }
         elif sub == 'stop':
             self.stop()
@@ -135,21 +135,19 @@ class Daemon(DaemonThread):
         return wallet
 
     def run_cmdline(self, config_options):
-        password = config_options.get('password')
         config = SimpleConfig(config_options)
         cmdname = config.get('cmd')
         cmd = known_commands[cmdname]
         wallet = self.load_wallet(config) if cmd.requires_wallet else None
-        if wallet:
-            wallet.wait_until_synchronized()
         # arguments passed to function
         args = map(lambda x: config.get(x), cmd.params)
         # decode json arguments
         args = map(json_decode, args)
         # options
         args += map(lambda x: config.get(x), cmd.options)
-        cmd_runner = Commands(config, wallet, self.network)
-        cmd_runner.password = password
+        cmd_runner = Commands(config, wallet, self.network,
+                              password=config_options.get('password'),
+                              new_password=config_options.get('new_password'))
         func = getattr(cmd_runner, cmd.name)
         result = func(*args)
         return result

lib/qrscanner.py

@@ -12,7 +12,7 @@ proc = None
 def scan_qr(config):
     global proc
     if not zbar:
-        raise BaseException("\n".join([_("Cannot start QR scanner."),_("The zbar package is not available."),_("On Linux, try 'sudo pip install zbar'")]))
+        raise RuntimeError("\n".join([_("Cannot start QR scanner."),_("The zbar package is not available."),_("On Linux, try 'sudo pip install zbar'")]))
     if proc is None:
         device = config.get("video_device", "default")
         if device == 'default':

lib/synchronizer.py

@@ -179,5 +179,5 @@ class Synchronizer(ThreadJob):
         if up_to_date != self.wallet.is_up_to_date():
             self.wallet.set_up_to_date(up_to_date)
             if up_to_date:
-                self.wallet.save_transactions()
+                self.wallet.save_transactions(write=True)
             self.network.trigger_callback('updated')

lib/tests/test_wallet.py

@@ -57,7 +57,7 @@ class TestWalletStorage(WalletTestCase):
         some_dict = {"a":"b", "c":"d"}
 
         for key, value in some_dict.items():
-            storage.put(key, value, False)
+            storage.put(key, value)
         storage.write()
 
         contents = ""

lib/util.py

@@ -10,6 +10,8 @@ import urllib
 import threading
 from i18n import _
 
+base_units = {'BTC':8, 'mBTC':5, 'uBTC':2}
+
 def normalize_version(v):
     return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
 
@@ -147,20 +149,20 @@ def json_encode(obj):
 
 def json_decode(x):
     try:
-        return json.loads(x)
+        return json.loads(x, parse_float=decimal.Decimal)
     except:
         return x
 
 # decorator that prints execution time
 def profiler(func):
-    def do_profile(func, args):
+    def do_profile(func, args, kw_args):
         n = func.func_name
         t0 = time.time()
-        o = apply(func, args)
+        o = func(*args, **kw_args)
         t = time.time() - t0
         print_error("[profiler]", n, "%.4f"%t)
         return o
-    return lambda *args: do_profile(func, args)
+    return lambda *args, **kw_args: do_profile(func, args, kw_args)
 
 
 
@@ -317,7 +319,7 @@ def block_explorer_URL(config, kind, item):
 #_ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE)
 #urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x)
 
-def parse_URI(uri):
+def parse_URI(uri, on_pr=None):
     import bitcoin
     from bitcoin import COIN
 
@@ -364,6 +366,22 @@ def parse_URI(uri):
     if 'sig' in out:
         out['sig'] = bitcoin.base_decode(out['sig'], None, base=58).encode('hex')
 
+    r = out.get('r')
+    sig = out.get('sig')
+    name = out.get('name')
+    if r or (name and sig):
+        def get_payment_request_thread():
+            import paymentrequest as pr
+            if name and sig:
+                s = pr.serialize_request(out).SerializeToString()
+                request = pr.PaymentRequest(s)
+            else:
+                request = pr.get_payment_request(r)
+            on_pr(request)
+        t = threading.Thread(target=get_payment_request_thread)
+        t.setDaemon(True)
+        t.start()
+
     return out
 
 
@@ -561,13 +579,14 @@ class StoreDict(dict):
 
 
 def check_www_dir(rdir):
-    # rewrite index.html every time
     import urllib, urlparse, shutil, os
     if not os.path.exists(rdir):
         os.mkdir(rdir)
     index = os.path.join(rdir, 'index.html')
-    src = os.path.join(os.path.dirname(__file__), 'www', 'index.html')
-    shutil.copy(src, index)
+    if not os.path.exists(index):
+        print_error("copying index.html")
+        src = os.path.join(os.path.dirname(__file__), 'www', 'index.html')
+        shutil.copy(src, index)
     files = [
         "https://code.jquery.com/jquery-1.9.1.min.js",
         "https://raw.githubusercontent.com/davidshimjs/qrcodejs/master/qrcode.js",

lib/wallet.py

@@ -26,7 +26,7 @@ import json
 import copy
 from functools import partial
 
-from util import PrintError, profiler
+from util import NotEnoughFunds, PrintError, profiler
 
 from bitcoin import *
 from account import *
@@ -69,11 +69,11 @@ class WalletStorage(PrintError):
         except:
             try:
                 d = ast.literal_eval(data)  #parse raw data from reading wallet file
+                labels = d.get('labels', {})
             except Exception as e:
                 raise IOError("Cannot read wallet file '%s'" % self.path)
             self.data = {}
             # In old versions of Electrum labels were latin1 encoded, this fixes breakage.
-            labels = d.get('labels', {})
             for i, label in labels.items():
                 try:
                     unicode(label)
@@ -98,7 +98,7 @@ class WalletStorage(PrintError):
                 v = copy.deepcopy(v)
         return v
 
-    def put(self, key, value, save = True):
+    def put(self, key, value):
         try:
             json.dumps(key)
             json.dumps(value)
@@ -113,8 +113,6 @@ class WalletStorage(PrintError):
             elif key in self.data:
                 self.modified = True
                 self.data.pop(key)
-            if save:
-                self.write()
 
     def write(self):
         if threading.currentThread().isDaemon():
@@ -142,7 +140,7 @@ class WalletStorage(PrintError):
             import stat
             os.chmod(self.path, mode)
         self.print_error("saved", self.path)
-
+        self.modified = False
 
 
 class Abstract_Wallet(PrintError):
@@ -199,7 +197,7 @@ class Abstract_Wallet(PrintError):
 
         # save wallet type the first time
         if self.storage.get('wallet_type') is None:
-            self.storage.put('wallet_type', self.wallet_type, True)
+            self.storage.put('wallet_type', self.wallet_type)
 
     def diagnostic_name(self):
         return self.basename()
@@ -220,17 +218,18 @@ class Abstract_Wallet(PrintError):
                 self.transactions.pop(tx_hash)
 
     @profiler
-    def save_transactions(self):
+    def save_transactions(self, write=False):
         with self.transaction_lock:
             tx = {}
             for k,v in self.transactions.items():
                 tx[k] = str(v)
-            # Flush storage only with the last put
-            self.storage.put('transactions', tx, False)
-            self.storage.put('txi', self.txi, False)
-            self.storage.put('txo', self.txo, False)
-            self.storage.put('pruned_txo', self.pruned_txo, False)
-            self.storage.put('addr_history', self.history, True)
+            self.storage.put('transactions', tx)
+            self.storage.put('txi', self.txi)
+            self.storage.put('txo', self.txo)
+            self.storage.put('pruned_txo', self.pruned_txo)
+            self.storage.put('addr_history', self.history)
+            if write:
+                self.storage.write()
 
     def clear_history(self):
         with self.transaction_lock:
@@ -376,7 +375,7 @@ class Abstract_Wallet(PrintError):
 
         if changed:
             run_hook('set_label', self, name, text)
-            self.storage.put('labels', self.labels, True)
+            self.storage.put('labels', self.labels)
 
         return changed
 
@@ -436,7 +435,7 @@ class Abstract_Wallet(PrintError):
         self.unverified_tx.pop(tx_hash, None)
         with self.lock:
             self.verified_tx[tx_hash] = info  # (tx_height, timestamp, pos)
-        self.storage.put('verified_tx3', self.verified_tx, True)
+        self.storage.put('verified_tx3', self.verified_tx)
 
         conf, timestamp = self.get_confirmations(tx_hash)
         self.network.trigger_callback('verified', tx_hash, conf, timestamp)
@@ -867,24 +866,9 @@ class Abstract_Wallet(PrintError):
 
         return h2
 
-
     def get_label(self, tx_hash):
-        label = self.labels.get(tx_hash)
-        is_default = (label == '') or (label is None)
-        if is_default:
-            label = self.get_default_label(tx_hash)
-        return label, is_default
-
-    def get_default_label(self, tx_hash):
-        if self.txi.get(tx_hash) == {}:
-            d = self.txo.get(tx_hash, {})
-            labels = []
-            for addr in d.keys():
-                label = self.labels.get(addr)
-                if label:
-                    labels.append(label)
-            return ', '.join(labels)
-        return ''
+        label = self.labels.get(tx_hash, '')
+        return label
 
     def fee_per_kb(self, config):
         b = config.get('dynamic_fees')
@@ -899,7 +883,7 @@ class Abstract_Wallet(PrintError):
     def coin_chooser_name(self, config):
         kind = config.get('coin_chooser')
         if not kind in COIN_CHOOSERS:
-            kind = 'Classic'
+            kind = 'Oldest First'
         return kind
 
     def coin_chooser(self, config):
@@ -912,6 +896,10 @@ class Abstract_Wallet(PrintError):
             if type == 'address':
                 assert is_address(data), "Address " + data + " is invalid!"
 
+        # Avoid index-out-of-range with coins[0] below
+        if not coins:
+            raise NotEnoughFunds()
+
         for item in coins:
             self.add_input_info(item)
 
@@ -1044,7 +1032,7 @@ class Abstract_Wallet(PrintError):
         if self.has_seed():
             decoded = self.get_seed(old_password)
             self.seed = pw_encode( decoded, new_password)
-            self.storage.put('seed', self.seed, True)
+            self.storage.put('seed', self.seed)
 
         imported_account = self.accounts.get(IMPORTED_ACCOUNT)
         if imported_account:
@@ -1056,10 +1044,10 @@ class Abstract_Wallet(PrintError):
                 b = pw_decode(v, old_password)
                 c = pw_encode(b, new_password)
                 self.master_private_keys[k] = c
-            self.storage.put('master_private_keys', self.master_private_keys, True)
+            self.storage.put('master_private_keys', self.master_private_keys)
 
         self.use_encryption = (new_password != None)
-        self.storage.put('use_encryption', self.use_encryption,True)
+        self.storage.put('use_encryption', self.use_encryption)
 
     def is_frozen(self, addr):
         return addr in self.frozen_addresses
@@ -1071,7 +1059,7 @@ class Abstract_Wallet(PrintError):
                 self.frozen_addresses |= set(addrs)
             else:
                 self.frozen_addresses -= set(addrs)
-            self.storage.put('frozen_addresses', list(self.frozen_addresses), True)
+            self.storage.put('frozen_addresses', list(self.frozen_addresses))
             return True
         return False
 
@@ -1109,7 +1097,8 @@ class Abstract_Wallet(PrintError):
             self.verifier = None
             # Now no references to the syncronizer or verifier
             # remain so they will be GC-ed
-            self.storage.put('stored_height', self.get_local_height(), True)
+            self.storage.put('stored_height', self.get_local_height())
+        self.storage.write()
 
     def wait_until_synchronized(self, callback=None):
         from i18n import _
@@ -1147,7 +1136,7 @@ class Abstract_Wallet(PrintError):
         d = {}
         for k, v in self.accounts.items():
             d[k] = v.dump()
-        self.storage.put('accounts', d, True)
+        self.storage.put('accounts', d)
 
     def can_import(self):
         return not self.is_watching_only()
@@ -1431,9 +1420,9 @@ class Deterministic_Wallet(Abstract_Wallet):
         else:
             self.use_encryption = False
 
-        self.storage.put('seed', self.seed, False)
-        self.storage.put('seed_version', self.seed_version, False)
-        self.storage.put('use_encryption', self.use_encryption,True)
+        self.storage.put('seed', self.seed)
+        self.storage.put('seed_version', self.seed_version)
+        self.storage.put('use_encryption', self.use_encryption)
 
     def get_seed(self, password):
         return pw_decode(self.seed, password)
@@ -1445,7 +1434,7 @@ class Deterministic_Wallet(Abstract_Wallet):
         assert isinstance(value, int), 'gap limit must be of type int, not of %s'%type(value)
         if value >= self.gap_limit:
             self.gap_limit = value
-            self.storage.put('gap_limit', self.gap_limit, True)
+            self.storage.put('gap_limit', self.gap_limit)
             return True
 
         elif value >= self.min_acceptable_gap():
@@ -1456,7 +1445,7 @@ class Deterministic_Wallet(Abstract_Wallet):
                 account.receiving_pubkeys = account.receiving_pubkeys[0:n]
                 account.receiving_addresses = account.receiving_addresses[0:n]
             self.gap_limit = value
-            self.storage.put('gap_limit', self.gap_limit, True)
+            self.storage.put('gap_limit', self.gap_limit)
             self.save_accounts()
             return True
         else:
@@ -1579,11 +1568,11 @@ class BIP32_Wallet(Deterministic_Wallet):
         if xpub in self.master_public_keys.values():
             raise BaseException('Duplicate master public key')
         self.master_public_keys[name] = xpub
-        self.storage.put('master_public_keys', self.master_public_keys, True)
+        self.storage.put('master_public_keys', self.master_public_keys)
 
     def add_master_private_key(self, name, xpriv, password):
         self.master_private_keys[name] = pw_encode(xpriv, password)
-        self.storage.put('master_private_keys', self.master_private_keys, True)
+        self.storage.put('master_private_keys', self.master_private_keys)
 
     def derive_xkeys(self, root, derivation, password):
         x = self.master_private_keys[root]
@@ -1626,16 +1615,16 @@ class BIP32_Simple_Wallet(BIP32_Wallet):
     def create_xprv_wallet(self, xprv, password):
         xpub = bitcoin.xpub_from_xprv(xprv)
         account = BIP32_Account({'xpub':xpub})
-        self.storage.put('seed_version', self.seed_version, True)
+        self.storage.put('seed_version', self.seed_version)
         self.add_master_private_key(self.root_name, xprv, password)
         self.add_master_public_key(self.root_name, xpub)
         self.add_account('0', account)
         self.use_encryption = (password != None)
-        self.storage.put('use_encryption', self.use_encryption,True)
+        self.storage.put('use_encryption', self.use_encryption)
 
     def create_xpub_wallet(self, xpub):
         account = BIP32_Account({'xpub':xpub})
-        self.storage.put('seed_version', self.seed_version, True)
+        self.storage.put('seed_version', self.seed_version)
         self.add_master_public_key(self.root_name, xpub)
         self.add_account('0', account)
 
@@ -1834,7 +1823,7 @@ class OldWallet(Deterministic_Wallet):
     def create_master_keys(self, password):
         seed = self.get_seed(password)
         mpk = OldAccount.mpk_from_seed(seed)
-        self.storage.put('master_public_key', mpk, True)
+        self.storage.put('master_public_key', mpk)
 
     def get_master_public_key(self):
         return self.storage.get("master_public_key")
@@ -1852,8 +1841,8 @@ class OldWallet(Deterministic_Wallet):
 
     def create_watching_only_wallet(self, mpk):
         self.seed_version = OLD_SEED_VERSION
-        self.storage.put('seed_version', self.seed_version, False)
-        self.storage.put('master_public_key', mpk, True)
+        self.storage.put('seed_version', self.seed_version)
+        self.storage.put('master_public_key', mpk)
         self.create_account(mpk)
 
     def get_seed(self, password):
@@ -2037,7 +2026,7 @@ class Wallet(object):
 
     @classmethod
     def from_multisig(klass, key_list, password, storage, wallet_type):
-        storage.put('wallet_type', wallet_type, True)
+        storage.put('wallet_type', wallet_type)
         self = Multisig_Wallet(storage)
         key_list = sorted(key_list, key = lambda x: klass.is_xpub(x))
         for i, text in enumerate(key_list):
@@ -2056,7 +2045,7 @@ class Wallet(object):
                 else:
                     self.add_cosigner_seed(text, name, password)
         self.use_encryption = (password != None)
-        self.storage.put('use_encryption', self.use_encryption, True)
+        self.storage.put('use_encryption', self.use_encryption)
         self.create_main_account(password)
         return self
 

plugins/audio_modem/qt.py

@@ -1,18 +1,18 @@
-from electrum.plugins import BasePlugin, hook
-from electrum_gui.qt.util import WaitingDialog, EnterButton
-from electrum.util import print_msg, print_error
-from electrum.i18n import _
-
-from PyQt4.QtGui import *
-from PyQt4.QtCore import *
-
-import traceback
+from functools import partial
 import zlib
 import json
 from io import BytesIO
 import sys
 import platform
 
+from electrum.plugins import BasePlugin, hook
+from electrum_gui.qt.util import WaitingDialog, EnterButton, WindowModalDialog
+from electrum.util import print_msg, print_error
+from electrum.i18n import _
+
+from PyQt4.QtGui import *
+from PyQt4.QtCore import *
+
 try:
     import amodem.audio
     import amodem.main
@@ -42,11 +42,10 @@ class Plugin(BasePlugin):
         return True
 
     def settings_widget(self, window):
-        return EnterButton(_('Settings'), self.settings_dialog)
+        return EnterButton(_('Settings'), partial(self.settings_dialog, window))
 
-    def settings_dialog(self):
-        d = QDialog()
-        d.setWindowTitle("Settings")
+    def settings_dialog(self, window):
+        d = WindowModalDialog(window, _("Audio Modem Settings"))
 
         layout = QGridLayout(d)
         layout.addWidget(QLabel(_('Bit rate [kbps]: ')), 0, 0)
@@ -75,24 +74,20 @@ class Plugin(BasePlugin):
 
         def handler():
             blob = json.dumps(dialog.tx.as_dict())
-            self.sender = self._send(parent=dialog, blob=blob)
-            self.sender.start()
+            self._send(parent=dialog, blob=blob)
         b.clicked.connect(handler)
         dialog.sharing_buttons.insert(-1, b)
 
     @hook
     def scan_text_edit(self, parent):
-        def handler():
-            self.receiver = self._recv(parent=parent)
-            self.receiver.start()
-        parent.addButton(':icons/microphone.png', handler, _("Read from microphone"))
+        parent.addButton(':icons/microphone.png', partial(self._recv, parent),
+                         _("Read from microphone"))
 
     @hook
     def show_text_edit(self, parent):
         def handler():
             blob = str(parent.toPlainText())
-            self.sender = self._send(parent=parent, blob=blob)
-            self.sender.start()
+            self._send(parent=parent, blob=blob)
         parent.addButton(':icons/speaker.png', handler, _("Send to speaker"))
 
     def _audio_interface(self):
@@ -101,31 +96,25 @@ class Plugin(BasePlugin):
 
     def _send(self, parent, blob):
         def sender_thread():
-            try:
-                with self._audio_interface() as interface:
-                    src = BytesIO(blob)
-                    dst = interface.player()
-                    amodem.main.send(config=self.modem_config, src=src, dst=dst)
-            except Exception:
-                traceback.print_exc()
+            with self._audio_interface() as interface:
+                src = BytesIO(blob)
+                dst = interface.player()
+                amodem.main.send(config=self.modem_config, src=src, dst=dst)
 
         print_msg('Sending:', repr(blob))
         blob = zlib.compress(blob)
 
         kbps = self.modem_config.modem_bps / 1e3
         msg = 'Sending to Audio MODEM ({0:.1f} kbps)...'.format(kbps)
-        return WaitingDialog(parent=parent, message=msg, run_task=sender_thread)
+        WaitingDialog(parent, msg, sender_thread)
 
     def _recv(self, parent):
         def receiver_thread():
-            try:
-                with self._audio_interface() as interface:
-                    src = interface.recorder()
-                    dst = BytesIO()
-                    amodem.main.recv(config=self.modem_config, src=src, dst=dst)
-                    return dst.getvalue()
-            except Exception:
-                traceback.print_exc()
+            with self._audio_interface() as interface:
+                src = interface.recorder()
+                dst = BytesIO()
+                amodem.main.recv(config=self.modem_config, src=src, dst=dst)
+                return dst.getvalue()
 
         def on_success(blob):
             if blob:
@@ -135,5 +124,4 @@ class Plugin(BasePlugin):
 
         kbps = self.modem_config.modem_bps / 1e3
         msg = 'Receiving from Audio MODEM ({0:.1f} kbps)...'.format(kbps)
-        return WaitingDialog(parent=parent, message=msg,
-                             run_task=receiver_thread, on_success=on_success)
+        WaitingDialog(parent, msg, receiver_thread, on_success=on_success)

plugins/email_requests/qt.py

@@ -18,12 +18,10 @@
 
 from __future__ import absolute_import
 
-import socket
 import time
 import threading
 import base64
-from decimal import Decimal
-from Queue import Queue
+from functools import partial
 
 import smtplib
 import imaplib
@@ -37,12 +35,11 @@ from PyQt4.QtCore import *
 import PyQt4.QtCore as QtCore
 import PyQt4.QtGui as QtGui
 
-from electrum.paymentrequest import PR_UNPAID, PR_PAID, PR_EXPIRED
 from electrum.plugins import BasePlugin, hook
-from electrum import util
 from electrum.paymentrequest import PaymentRequest
 from electrum.i18n import _
-from electrum_gui.qt.util import text_dialog, EnterButton
+from electrum_gui.qt.util import EnterButton, Buttons, CloseButton
+from electrum_gui.qt.util import OkButton, WindowModalDialog
 
 
 
@@ -166,14 +163,10 @@ class Plugin(BasePlugin):
         return True
 
     def settings_widget(self, window):
-        self.settings_window = window
-        return EnterButton(_('Settings'), self.settings_dialog)
+        return EnterButton(_('Settings'), partial(self.settings_dialog, window))
 
-    def settings_dialog(self, x):
-        from electrum_gui.qt.util import Buttons, CloseButton, OkButton
-
-        d = QDialog(self.settings_window)
-        d.setWindowTitle("Email settings")
+    def settings_dialog(self, window):
+        d = WindowModalDialog(window, _("Email settings"))
         d.setMinimumSize(500, 200)
 
         vbox = QVBoxLayout(d)

plugins/exchange_rate/exchange_rate.py

@@ -346,13 +346,18 @@ class FxPlugin(BasePlugin, ThreadJob):
         return _("No data")
 
     @hook
-    def historical_value_str(self, satoshis, d_t):
+    def history_rate(self, d_t):
         rate = self.exchange.historical_rate(self.ccy, d_t)
         # Frequently there is no rate for today, until tomorrow :)
         # Use spot quotes in that case
         if rate is None and (datetime.today().date() - d_t.date()).days <= 2:
             rate = self.exchange.quotes.get(self.ccy)
             self.history_used_spot = True
+        return rate
+
+    @hook
+    def historical_value_str(self, satoshis, d_t):
+        rate = self.history_rate(d_t)
         return self.value_str(satoshis, rate)
 
     @hook

plugins/exchange_rate/qt.py

@@ -128,11 +128,10 @@ class Plugin(FxPlugin):
         window.connect(window.app, SIGNAL('refresh_headers'), window.history_list.refresh_headers)
 
     def settings_widget(self, window):
-        return EnterButton(_('Settings'), self.settings_dialog)
+        return EnterButton(_('Settings'), partial(self.settings_dialog, window))
 
-    def settings_dialog(self):
-        d = QDialog()
-        d.setWindowTitle("Settings")
+    def settings_dialog(self, window):
+        d = WindowModalDialog(window, _("Exchange Rate Settings"))
         layout = QGridLayout(d)
         layout.addWidget(QLabel(_('Exchange rate API: ')), 0, 0)
         layout.addWidget(QLabel(_('Currency: ')), 1, 0)

plugins/greenaddress_instant/qt.py

@@ -21,7 +21,7 @@ import urllib
 import sys
 import requests
 
-from PyQt4.QtGui import QMessageBox, QApplication, QPushButton
+from PyQt4.QtGui import QApplication, QPushButton
 
 from electrum.plugins import BasePlugin, hook
 from electrum.i18n import _
@@ -65,7 +65,7 @@ class Plugin(BasePlugin):
                     'to verify that transaction is instant.\n'
                     'Please enter your password to sign a\n'
                     'verification request.')
-            password = window.password_dialog(msg)
+            password = window.password_dialog(msg, parent=d)
             if not password:
                 return
         try:
@@ -84,14 +84,12 @@ class Plugin(BasePlugin):
 
             # 3. display the result
             if response.get('verified'):
-                QMessageBox.information(None, _('Verification successful!'),
-                    _('%s is covered by GreenAddress instant confirmation') % (tx.hash()), _('OK'))
+                d.show_message(_('%s is covered by GreenAddress instant confirmation') % (tx.hash()), title=_('Verification successful!'))
             else:
-                QMessageBox.critical(None, _('Verification failed!'),
-                    _('%s is not covered by GreenAddress instant confirmation') % (tx.hash()), _('OK'))
+                d.show_critical(_('%s is not covered by GreenAddress instant confirmation') % (tx.hash()), title=_('Verification failed!'))
         except BaseException as e:
             import traceback
             traceback.print_exc(file=sys.stdout)
-            QMessageBox.information(None, _('Error'), str(e), _('OK'))
+            d.show_error(str(e))
         finally:
             d.verify_button.setText(self.button_label)

plugins/keepkey/qt.py

@@ -1,4 +1,4 @@
-from PyQt4.Qt import QMessageBox, QDialog, QVBoxLayout, QLabel, QThread, SIGNAL, QGridLayout, QInputDialog, QPushButton
+from PyQt4.Qt import QVBoxLayout, QLabel, SIGNAL, QGridLayout, QInputDialog, QPushButton
 import PyQt4.QtCore as QtCore
 from electrum_gui.qt.util import *
 from electrum_gui.qt.main_window import StatusBarButton, ElectrumWindow
@@ -26,11 +26,11 @@ class Plugin(KeepKeyPlugin):
         try:
             self.get_client().ping('t')
         except BaseException as e:
-            QMessageBox.information(window, _('Error'), _("KeepKey device not detected.\nContinuing in watching-only mode." + '\n\nReason:\n' + str(e)), _('OK'))
+            window.show_error(_('KeepKey device not detected.\nContinuing in watching-only mode.\nReason:\n' + str(e)))
             self.wallet.force_watching_only = True
             return
         if self.wallet.addresses() and not self.wallet.check_proper_device():
-            QMessageBox.information(window, _('Error'), _("This wallet does not match your KeepKey device"), _('OK'))
+            window.show_error(_("This wallet does not match your KeepKey device"))
             self.wallet.force_watching_only = True
 
     @hook
@@ -73,7 +73,7 @@ class Plugin(KeepKeyPlugin):
             return
         get_label = lambda: self.get_client().features.label
         update_label = lambda: current_label_label.setText("Label: %s" % get_label())
-        d = QDialog()
+        d = WindowModalDialog(window, _("KeepKey Settings"))
         layout = QGridLayout(d)
         layout.addWidget(QLabel("KeepKey Options"),0,0)
         layout.addWidget(QLabel("ID:"),1,0)
@@ -132,10 +132,7 @@ class KeepKeyQtHandler:
         return self.passphrase
 
     def pin_dialog(self):
-        d = QDialog(None)
-        d.setModal(1)
-        d.setWindowTitle(_("Enter PIN"))
-        d.setWindowFlags(d.windowFlags() | QtCore.Qt.WindowStaysOnTopHint)
+        d = WindowModalDialog(self.win, _("Enter PIN"))
         matrix = PinMatrixWidget()
         vbox = QVBoxLayout()
         vbox.addWidget(QLabel(self.message))
@@ -153,23 +150,18 @@ class KeepKeyQtHandler:
             self.passphrase = unicodedata.normalize('NFKD', unicode(passphrase)) if passphrase else ''
         else:
             assert type(self.win) is InstallWizard
-            from electrum_gui.qt.password_dialog import make_password_dialog, run_password_dialog
-            d = QDialog()
-            d.setModal(1)
-            d.setLayout(make_password_dialog(d, None, self.message, False))
-            confirmed, p, passphrase = run_password_dialog(d, None, None)
+            from electrum_gui.qt.password_dialog import PasswordDialog
+            d = PasswordDialog(self.win, None, None, self.message, False)
+            confirmed, p, passphrase = d.run()
             if not confirmed:
-                QMessageBox.critical(None, _('Error'), _("Password request canceled"), _('OK'))
+                self.win.show_critical(_("Password request canceled"))
                 self.passphrase = None
             else:
                 self.passphrase = unicodedata.normalize('NFKD', unicode(passphrase)) if passphrase else ''
         self.done.set()
 
     def message_dialog(self):
-        self.d = QDialog()
-        self.d.setModal(1)
-        self.d.setWindowTitle('Please Check KeepKey Device')
-        self.d.setWindowFlags(self.d.windowFlags() | QtCore.Qt.WindowStaysOnTopHint)
+        self.d = WindowModalDialog(self.win, _('Please Check KeepKey Device'))
         l = QLabel(self.message)
         vbox = QVBoxLayout(self.d)
         vbox.addWidget(l)
@@ -182,5 +174,3 @@ class KeepKeyQtHandler:
 
     def dialog_stop(self):
         self.d.hide()
-
-

plugins/labels/labels.py

@@ -42,9 +42,9 @@ class LabelsPlugin(BasePlugin):
             self.set_nonce(wallet, nonce)
         return nonce
 
-    def set_nonce(self, wallet, nonce, force_write=True):
+    def set_nonce(self, wallet, nonce):
         self.print_error("set", wallet.basename(), "nonce to", nonce)
-        wallet.storage.put("wallet_nonce", nonce, force_write)
+        wallet.storage.put("wallet_nonce", nonce)
 
     @hook
     def set_label(self, wallet, item, label):
@@ -61,7 +61,7 @@ class LabelsPlugin(BasePlugin):
         t.setDaemon(True)
         t.start()
         # Caller will write the wallet
-        self.set_nonce(wallet, nonce + 1, force_write=False)
+        self.set_nonce(wallet, nonce + 1)
 
     def do_request(self, method, url = "/labels", is_batch=False, data=None):
         url = 'https://' + self.target_host + url
@@ -125,8 +125,8 @@ class LabelsPlugin(BasePlugin):
 
             self.print_error("received %d labels" % len(response))
             # do not write to disk because we're in a daemon thread
-            wallet.storage.put('labels', wallet.labels, False)
-            self.set_nonce(wallet, response["nonce"] + 1, False)
+            wallet.storage.put('labels', wallet.labels)
+            self.set_nonce(wallet, response["nonce"] + 1)
             self.on_pulled(wallet)
 
         except Exception as e:

plugins/labels/qt.py

@@ -6,7 +6,8 @@ from PyQt4.QtCore import *
 from electrum.plugins import hook
 from electrum.i18n import _
 from electrum_gui.qt import EnterButton
-from electrum_gui.qt.util import ThreadedButton, Buttons, CancelButton, OkButton
+from electrum_gui.qt.util import ThreadedButton, Buttons, CancelButton
+from electrum_gui.qt.util import WindowModalDialog, OkButton
 
 from labels import LabelsPlugin
 
@@ -25,25 +26,23 @@ class Plugin(LabelsPlugin):
                            partial(self.settings_dialog, window))
 
     def settings_dialog(self, window):
-        d = QDialog(window)
+        wallet = window.parent().wallet
+        d = WindowModalDialog(window, _("Label Settings"))
         vbox = QVBoxLayout(d)
         layout = QGridLayout()
         vbox.addLayout(layout)
         layout.addWidget(QLabel("Label sync options: "), 2, 0)
         self.upload = ThreadedButton("Force upload",
-                                     partial(self.push_thread, window.wallet),
+                                     partial(self.push_thread, wallet),
                                      self.done_processing)
         layout.addWidget(self.upload, 2, 1)
         self.download = ThreadedButton("Force download",
-                                       partial(self.pull_thread, window.wallet, True),
+                                       partial(self.pull_thread, wallet, True),
                                        self.done_processing)
         layout.addWidget(self.download, 2, 2)
         self.accept = OkButton(d, _("Done"))
         vbox.addLayout(Buttons(CancelButton(d), self.accept))
-        if d.exec_():
-            return True
-        else:
-            return False
+        return bool(d.exec_())
 
     def on_pulled(self, wallet):
         self.obj.emit(SIGNAL('labels_changed'), wallet)

plugins/ledger/qt.py

@@ -1,7 +1,7 @@
-from PyQt4.Qt import QApplication, QMessageBox, QDialog, QInputDialog, QLineEdit, QVBoxLayout, QLabel, QThread, SIGNAL
+from PyQt4.Qt import QDialog, QInputDialog, QLineEdit, QVBoxLayout, QLabel, SIGNAL
 import PyQt4.QtCore as QtCore
+import threading
 
-from electrum_gui.qt.password_dialog import make_password_dialog, run_password_dialog
 from electrum.plugins import BasePlugin, hook
 
 from ledger import LedgerPlugin
@@ -16,10 +16,10 @@ class Plugin(LedgerPlugin):
             self.handler = BTChipQTHandler(window)
         if self.btchip_is_connected():
             if not self.wallet.check_proper_device():
-                QMessageBox.information(window, _('Error'), _("This wallet does not match your Ledger device"), _('OK'))
+                window.show_error(_("This wallet does not match your Ledger device"))
                 self.wallet.force_watching_only = True
         else:
-            QMessageBox.information(window, _('Error'), _("Ledger device not detected.\nContinuing in watching-only mode."), _('OK'))
+            window.show_error(_("Ledger device not detected.\nContinuing in watching-only mode."))
             self.wallet.force_watching_only = True
 
 

plugins/trezor/qt.py

@@ -1,4 +1,4 @@
-from PyQt4.Qt import QMessageBox, QDialog, QVBoxLayout, QLabel, QThread, SIGNAL, QGridLayout, QInputDialog, QPushButton
+from PyQt4.Qt import QVBoxLayout, QLabel, SIGNAL, QGridLayout, QInputDialog, QPushButton
 import PyQt4.QtCore as QtCore
 from electrum_gui.qt.util import *
 from electrum_gui.qt.main_window import StatusBarButton, ElectrumWindow
@@ -46,10 +46,7 @@ class TrezorQtHandler:
         return self.passphrase
 
     def pin_dialog(self):
-        d = QDialog(None)
-        d.setModal(1)
-        d.setWindowTitle(_("Enter PIN"))
-        d.setWindowFlags(d.windowFlags() | QtCore.Qt.WindowStaysOnTopHint)
+        d = WindowModalDialog(self.win, _("Enter PIN"))
         matrix = PinMatrixWidget()
         vbox = QVBoxLayout()
         vbox.addWidget(QLabel(self.message))
@@ -67,23 +64,18 @@ class TrezorQtHandler:
             self.passphrase = unicodedata.normalize('NFKD', unicode(passphrase)) if passphrase else ''
         else:
             assert type(self.win) is InstallWizard
-            from electrum_gui.qt.password_dialog import make_password_dialog, run_password_dialog
-            d = QDialog()
-            d.setModal(1)
-            d.setLayout(make_password_dialog(d, None, self.message, False))
-            confirmed, p, passphrase = run_password_dialog(d, None, None)
+            from electrum_gui.qt.password_dialog import PasswordDialog
+            d = PasswordDialog(self.win, None, None, self.message, False)
+            confirmed, p, passphrase = d.run()
             if not confirmed:
-                QMessageBox.critical(None, _('Error'), _("Password request canceled"), _('OK'))
+                self.win.show_critical(_("Password request canceled"))
                 self.passphrase = None
             else:
                 self.passphrase = unicodedata.normalize('NFKD', unicode(passphrase)) if passphrase else ''
         self.done.set()
 
     def message_dialog(self):
-        self.d = QDialog()
-        self.d.setModal(1)
-        self.d.setWindowTitle('Please Check Trezor Device')
-        self.d.setWindowFlags(self.d.windowFlags() | QtCore.Qt.WindowStaysOnTopHint)
+        self.d = WindowModalDialog(self.win, _('Please Check Trezor Device'))
         l = QLabel(self.message)
         vbox = QVBoxLayout(self.d)
         vbox.addWidget(l)
@@ -108,11 +100,11 @@ class Plugin(TrezorPlugin):
         try:
             self.get_client().ping('t')
         except BaseException as e:
-            QMessageBox.information(window, _('Error'), _("Trezor device not detected.\nContinuing in watching-only mode." + '\n\nReason:\n' + str(e)), _('OK'))
+            window.show_error(_('Trezor device not detected.\nContinuing in watching-only mode.\nReason:\n' + str(e)))
             self.wallet.force_watching_only = True
             return
         if self.wallet.addresses() and not self.wallet.check_proper_device():
-            QMessageBox.information(window, _('Error'), _("This wallet does not match your Trezor device"), _('OK'))
+            window.show_error(_("This wallet does not match your Trezor device"))
             self.wallet.force_watching_only = True
 
     @hook
@@ -171,7 +163,7 @@ class Plugin(TrezorPlugin):
             return
         get_label = lambda: self.get_client().features.label
         update_label = lambda: current_label_label.setText("Label: %s" % get_label())
-        d = QDialog()
+        d = WindowModalDialog(window, _("Trezor Settings"))
         layout = QGridLayout(d)
         layout.addWidget(QLabel("Trezor Options"),0,0)
         layout.addWidget(QLabel("ID:"),1,0)
@@ -194,7 +186,3 @@ class Plugin(TrezorPlugin):
         layout.addWidget(current_label_label,3,0)
         layout.addWidget(change_label_button,3,1)
         d.exec_()
-
-
-
-

plugins/trustedcoin/qt.py

@@ -1,4 +1,23 @@
+#!/usr/bin/env python
+#
+# Electrum - Lightweight Bitcoin Client
+# Copyright (C) 2015 Thomas Voegtlin
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
 from functools import partial
+from threading import Thread
 
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
@@ -10,7 +29,19 @@ from electrum_gui.qt.main_window import StatusBarButton
 from electrum.i18n import _
 from electrum.plugins import hook
 
-from trustedcoin import TrustedCoinPlugin
+from trustedcoin import TrustedCoinPlugin, Wallet_2fa
+
+def need_server(wallet, tx):
+    from electrum.account import BIP32_Account
+    # Detect if the server is needed
+    long_id, short_id = wallet.get_user_id()
+    xpub3 = wallet.master_public_keys['x3/']
+    for x in tx.inputs_to_sign():
+        if x[0:2] == 'ff':
+            xpub, sequence = BIP32_Account.parse_xpubkey(x)
+            if xpub == xpub3:
+                return True
+    return False
 
 class Plugin(TrustedCoinPlugin):
 
@@ -27,8 +58,7 @@ class Plugin(TrustedCoinPlugin):
             t.start()
 
     def auth_dialog(self, window):
-        d = QDialog(window)
-        d.setModal(1)
+        d = WindowModalDialog(window, _("Authorization"))
         vbox = QVBoxLayout(d)
         pw = AmountEdit(None, is_int = True)
         msg = _('Please enter your Google Authenticator code')
@@ -55,16 +85,18 @@ class Plugin(TrustedCoinPlugin):
                 self.print_error("twofactor: xpub3 not needed")
             window.wallet.auth_code = auth_code
 
+    def waiting_dialog(self, window, on_success=None):
+        task = partial(self.request_billing_info, window.wallet)
+        return WaitingDialog(window, 'Getting billing information...', task,
+                             on_success=on_success)
+
     @hook
     def abort_send(self, window):
         wallet = window.wallet
         if type(wallet) is Wallet_2fa and not wallet.can_sign_without_server():
             if wallet.billing_info is None:
                 # request billing info before forming the transaction
-                task = partial(self.request_billing_info, wallet)
-                waiting_dialog = WaitingDialog(window, 'please wait...', task)
-                waiting_dialog.start()
-                waiting_dialog.wait()
+                waiting_dialog(self, window).wait()
                 if wallet.billing_info is None:
                     window.show_message('Could not contact server')
                     return True
@@ -72,9 +104,8 @@ class Plugin(TrustedCoinPlugin):
 
 
     def settings_dialog(self, window):
-        task = partial(self.request_billing_info, window.wallet)
-        self.waiting_dialog = WaitingDialog(window, 'please wait...', task, partial(self.show_settings_dialog, window))
-        self.waiting_dialog.start()
+        on_success = partial(self.show_settings_dialog, window)
+        self.waiting_dialog(window, on_success)
 
     def show_settings_dialog(self, window, success):
         if not success:
@@ -82,8 +113,7 @@ class Plugin(TrustedCoinPlugin):
             return
 
         wallet = window.wallet
-        d = QDialog(window)
-        d.setWindowTitle("TrustedCoin Information")
+        d = WindowModalDialog(window, _("TrustedCoin Information"))
         d.setMinimumSize(500, 200)
         vbox = QVBoxLayout(d)
         hbox = QHBoxLayout()
@@ -238,7 +268,5 @@ class Plugin(TrustedCoinPlugin):
                 server.auth(_id, otp)
                 return True
             except:
-                QMessageBox.information(window, _('Message'), _('Incorrect password'), _('OK'))
+                window.show_message(_('Incorrect password'))
                 pw.setText('')
-
-

plugins/trustedcoin/trustedcoin.py

@@ -16,7 +16,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from threading import Thread
 import socket
 import os
 import re
@@ -270,18 +269,6 @@ def make_billing_address(wallet, num):
     address = public_key_to_bc_address( cK )
     return address
 
-def need_server(wallet, tx):
-    from electrum.account import BIP32_Account
-    # Detect if the server is needed
-    long_id, short_id = wallet.get_user_id()
-    xpub3 = wallet.master_public_keys['x3/']
-    for x in tx.inputs_to_sign():
-        if x[0:2] == 'ff':
-            xpub, sequence = BIP32_Account.parse_xpubkey(x)
-            if xpub == xpub3:
-                return True
-    return False
-
 
 class TrustedCoinPlugin(BasePlugin):
 
@@ -318,8 +305,8 @@ class TrustedCoinPlugin(BasePlugin):
             return
 
         password = window.password_dialog()
-        wallet.storage.put('seed_version', wallet.seed_version, True)
-        wallet.storage.put('use_encryption', password is not None, True)
+        wallet.storage.put('seed_version', wallet.seed_version)
+        wallet.storage.put('use_encryption', password is not None)
 
         words = seed.split()
         n = len(words)/2