I'm experimenting with pyqt and I'm running in some strange behavior. The examples3/canvas/canvas.py demo contains the following lines:
def newView(self):
self.m=Main(self.canvas,None,"new windiw",Qt.WDestructiveClose)
qApp.setMainWidget(self.m)
self.m.show()
qApp.setMainWidget(None)What I'm wondering about is the reason for the 'Main' instance to be stored in an attribute. In fact, if I replace 'self.m' by 'm' the applet doesn't work any more, i.e. as soon as I create the second view the first will be destructed. What's the reason for this ? It appears the ref count for the view drops to zero so it gets destroyed... But in the above, it would seem the second call to 'newView' would free the first view, and thus destroy it, too. That, however, is not the case.
The reason I'm asking is because I'm using a modified version of the canvas.py demo, where this behavior is even more disturbing, i.e. I don't get more than one view at any given time.
Any help would be highly appreciated !
Stefan
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