Fix history headers on plugin load / unload

gui/qt/history_widget.py

@@ -28,13 +28,18 @@ from electrum.plugins import run_hook
 class HistoryWidget(MyTreeWidget):
 
     def __init__(self, parent=None):
-        headers = ['', '', _('Date'), _('Description') , _('Amount'), _('Balance')]
-        run_hook('history_tab_headers', headers)
-        MyTreeWidget.__init__(self, parent, self.create_menu, headers, 3)
+        MyTreeWidget.__init__(self, parent, self.create_menu, [], 3)
+        self.refresh_headers()
         self.setColumnHidden(1, True)
         self.config = self.parent.config
         self.setSortingEnabled(False)
 
+    def refresh_headers(self):
+        headers = ['', '', _('Date'), _('Description') , _('Amount'),
+                   _('Balance')]
+        run_hook('history_tab_headers', headers)
+        self.update_headers(headers)
+
     def get_icon(self, conf, timestamp):
         time_str = _("unknown")
         if conf > 0:

gui/qt/util.py

@@ -303,9 +303,7 @@ class MyTreeWidget(QTreeWidget):
                  editable_columns=None):
         QTreeWidget.__init__(self, parent)
         self.parent = parent
-        self.setColumnCount(len(headers))
-        self.setHeaderLabels(headers)
-        self.header().setStretchLastSection(False)
+        self.stretch_column = stretch_column
         self.setContextMenuPolicy(Qt.CustomContextMenu)
         self.itemActivated.connect(self.on_activated)
         self.customContextMenuRequested.connect(create_menu)
@@ -322,12 +320,19 @@ class MyTreeWidget(QTreeWidget):
                              QAbstractItemView.EditKeyPressed)
         self.setItemDelegate(EditableItemDelegate(self))
         self.itemChanged.connect(self.item_changed)
-
-        # stretch
-        for i in range(len(headers)):
-            self.header().setResizeMode(i, QHeaderView.Stretch if i == stretch_column else QHeaderView.ResizeToContents)
+        self.update_headers(headers)
         self.setSortingEnabled(True)
 
+    def update_headers(self, headers):
+        self.setColumnCount(len(headers))
+        self.setHeaderLabels(headers)
+        self.header().setStretchLastSection(False)
+        for col in range(len(headers)):
+            if col == self.stretch_column:
+                self.header().setResizeMode(col, QHeaderView.Stretch)
+            else:
+                self.header().setResizeMode(col, QHeaderView.ResizeToContents)
+
     def on_activated(self, item):
         if not item:
             return

plugins/exchange_rate.py

@@ -268,6 +268,7 @@ class Plugin(BasePlugin, ThreadJob):
                                 'last_edited': {}}
         self.connect_fields(window, window.amount_e, send_e, window.fee_e)
         self.connect_fields(window, window.receive_amount_e, receive_e, None)
+        window.history_list.refresh_headers()
         window.update_status()
 
     def connect_fields(self, window, btc_e, fiat_e, fee_e):
@@ -313,6 +314,7 @@ class Plugin(BasePlugin, ThreadJob):
         for window, data in self.windows.items():
             for edit in data['edits']:
                 edit.hide()
+            window.history_list.refresh_headers()
             window.update_status()
 
     def on_fx_history(self):