from electrum.i18n import _
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import os.path
import time


class Timer(QThread):
    def run(self):
        while True:
            self.emit(SIGNAL('timersignal'))
            time.sleep(0.5)


class EnterButton(QPushButton):
    def __init__(self, text, func):
        QPushButton.__init__(self, text)
        self.func = func
        self.clicked.connect(func)

    def keyPressEvent(self, e):
        if e.key() == Qt.Key_Return:
            apply(self.func,())





class HelpButton(QPushButton):
    def __init__(self, text):
        QPushButton.__init__(self, '?')
        self.setFocusPolicy(Qt.NoFocus)
        self.setFixedWidth(20)
        self.clicked.connect(lambda: QMessageBox.information(self, 'Help', text, 'OK') )




def close_button(dialog, label=_("Close") ):
    hbox = QHBoxLayout()
    hbox.addStretch(1)
    b = QPushButton(label)
    hbox.addWidget(b)
    b.clicked.connect(dialog.close)
    b.setDefault(True)
    return hbox

def ok_cancel_buttons(dialog, ok_label=_("OK") ):
    hbox = QHBoxLayout()
    hbox.addStretch(1)
    b = QPushButton(_("Cancel"))
    hbox.addWidget(b)
    b.clicked.connect(dialog.reject)
    b = QPushButton(ok_label)
    hbox.addWidget(b)
    b.clicked.connect(dialog.accept)
    b.setDefault(True)
    return hbox

def text_dialog(parent, title, label, ok_label):
    dialog = QDialog(parent)
    dialog.setMinimumWidth(500)
    dialog.setWindowTitle(title)
    dialog.setModal(1)
    l = QVBoxLayout()
    dialog.setLayout(l)
    l.addWidget(QLabel(label))
    txt = QTextEdit()
    l.addWidget(txt)
    l.addLayout(ok_cancel_buttons(dialog, ok_label))
    if dialog.exec_():
        return unicode(txt.toPlainText())


class MyTreeWidget(QTreeWidget):
    def __init__(self, parent):
        QTreeWidget.__init__(self, parent)
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.connect(self, SIGNAL('itemActivated(QTreeWidgetItem*, int)'), self.itemactivated)

    def itemactivated(self, item):
        if not item: return
        for i in range(0,self.viewport().height()/5):
            if self.itemAt(QPoint(0,i*5)) == item:
                break
        else:
            return
        for j in range(0,30):
            if self.itemAt(QPoint(0,i*5 + j)) != item:
                break
        self.emit(SIGNAL('customContextMenuRequested(const QPoint&)'), QPoint(50, i*5 + j - 1))