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#!/usr/bin/python
# -*- coding: utf-8 -*-
from __future__ import division
 
import sys
from PyQt4 import QtCore, QtGui
 
class MyLineEdit(QtGui.QLineEdit):
    def __init__(self, parent=None):
        super(MyLineEdit, self).__init__(parent)
        self.parent = parent
 
    def focusOutEvent(self, event=None):
        super(MyLineEdit, self).focusOutEvent(event)
        self.parent.lineEdit2.setText(u"perte de focus de la 1ère ligne")
 
    def focusInEvent(self, event=None):
        super(MyLineEdit, self).focusInEvent(event)
        self.parent.lineEdit2.setText(u"reprise de focus de la 1ère ligne")
 
class Fenetre(QtGui.QWidget):
    def __init__(self, parent=None):
        super(Fenetre, self).__init__(parent)
        self.setWindowTitle("Code test")
 
        # créer le lineEdit
        self.lineEdit = MyLineEdit(self)
 
        # créer le 2ème lineEdit
        self.lineEdit2 = QtGui.QLineEdit(self)
 
        # positionnement des 2 widget dans la fenêtre
        posit = QtGui.QGridLayout()
        posit.addWidget(self.lineEdit, 0, 0)
        posit.addWidget(self.lineEdit2, 1, 0)
        self.setLayout(posit)
 
if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    QtGui.QApplication.setStyle(QtGui.QStyleFactory.create('plastique'))
    fen = Fenetre()
    fen.show()
    sys.exit(app.exec_()) | 
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