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..:) )

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

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