[PyKDE] Getting control over the Tab key

[Phil Thompson]

On Wednesday 23 October 2002 7:28 pm, Konrad Hinsen wrote:
> > They may be filtered out by the widget that has focus, it's hard to
>
> At least they never appear in keyPressEvent(), neither for the main
> widget nor for the widget in focus.
>
> > tell. If you want to make sure that you catch all the tab key events,
> > have a look at QObject::eventFilter() and QObject::installEventFilter().
>
> I tried that, but how does one define an event filter in Python?
> Here is what I tried:
>
>   class FilterObject(QObject):
>
>       def eventFilter(self, object, event):
> 	  sys.stderr.write(repr(object) + ':' + repr(event) + '\n')
> 	  return 1
>
>   app = QApplication(sys.argv)
>   ...
>   app.installEventFilter(FilterObject())
>   ...
>   app.exec_loop()
>
> This doesn't crash, but doesn't do anything either, the event filter
> routine is never called.

That's because you aren't keeping a reference to the FilterObject instance so 
it gets garbage collected immediately.

Phil