KeyReleaseEvent() not picked up after opening file chooser with shortcut Ctrl+O

[jesuisbenjamin]

Hello,

I have implemented a Ctrl+wheelEvent for a zoom action on a QGraphicsView. I manage this by picking up the keyPressEvent(), set a self.ctrl = True value and on keyReleaseEvent() I set the self.ctrl = False.

It works correctly except when I open the file chooser with Ctrl+O, in which case the keyPressEvent() is picked up, but the keyReleaseEvent() is not. Because of this the self.ctrl remains True and a wheelEvent alone is then able to activate the zoom action without the Ctrl key being pressed.

I work around this by setting the self.ctrl value to False right after the file chooser has done its job, but I find this an ugly way to solve the issue.

So did I implement this the wrong way? What's the best practice? Thanks.

[mkuettler]

Hi Benjamin :)

You can use
@
if (event->modifiers() & Qt::ShiftModifier) {
// Shift is pressed
}
@

in your wheelEvent.

[mkuettler]

Oh, you would obviously want to use
@
event->modifiers() & Qt::ControlModifier
@

Sorry.