[PyQt] QComboBox don't emit signal into a dialog box

[Phil Thompson]

On Thu, 17 Oct 2013 11:20:43 +0200, Vincent Vande Vyvre
<vincent.vandevyvre at swing.be> wrote:
> When placed into a dialog box the QComboBox don't emit any signal if the

> user activate it.
> 
> When the current item is changed by the program, the signal is correctly

> emitted.
> 
> Python 2.7,  Qt: 4.8.1,  PyQt: 4.9.1
> Python 3.2,  Qt: 4.8.1,  PyQt: 4.9.1
> 
> Example
> 
> from PyQt4 import QtGui
> 
> class Editor(object):
>      def __init__(self, Dial):
>          super(Editor, self).__init__()
>          self.grid = QtGui.QGridLayout(Dial)
>          self.cmb = QtGui.QComboBox(Dial)
>          self.grid.addWidget(self.cmb, 0, 0, 1, 1)
>          self.cmb.addItems(['One', 'Two', 'Three'])
>          self.cmb.currentIndexChanged.connect(self.index_changed)
>          self.cmb.activated.connect(self.index_changed)
>          self.btn = QtGui.QPushButton('Quit', Dial)
>          self.grid.addWidget(self.btn, 1, 0, 1, 1)
>          self.btn.clicked.connect(Dial.accept)
> 
>          self.cmb.setCurrentIndex(1)
> 
>      def index_changed(self, idx):
>          print('Index:', idx)
> 
> app = QtGui.QApplication([])
> Dial = QtGui.QDialog()
> Editor(Dial)
> reply = Dial.exec_()
> 
> With Qt: 5.0.2 + PyQt: 5.0 no problem, that's works.

Keep a reference to your Editor instance.

Phil