QSplitter: how to know when a widget is added/removed form the splitter

[A Former User]

Hello,
Is there a signal sent on a widget's addition/removal to the splitter. I tried overriding the QObject::ChildEvent() but i noticed that the splitter count isn't updated when this event is been called(although its been called several times, there isn't a call after QSplitter::count() is updated).
I want to do some updates on splitter on each widget's add/removal.

Please see my second post in this thread for the work around.

[Joel Bodenmann]

I have never worked with QSplitter so I don't know if this is the problem or not, but did you make sure that you call the default implementation of the QSplitter::childEvent() method in your own override? Something like this:

void MySplitter::childEvent(QChildEvent* c) {
	// Call the default implementation
	QSplitter::childEvent(c)

	// Do my own stuff here
	applyMagic();
}

[A Former User]

Thanks for the reply @Joel-Bodenmann
Yes i did call QSplitter::childEvent(event),

but i think child event is getting called after widget reparenting & also on polish events but not after QSplitter::count() is updated.

Good thing is that i found a work around,

• I've reimplemented QSplitter::paintEvent() and doing "MAGIC" but i found that paintEvent is called too many times.
• So, i'm storiing QSplitter::count() in a member variable & updating it on every paintEvent(). With this i was able to "applyMagic()" only when the splitter count() is actually changed.
  I think this isn't an ideal solution but all i need is to "applyMagic()" when the splitter is about to be shown after getting widgets added/removed. (manipulating Qt event handlers to solve our purposes..:) )