I am puting a QWidget and a QTabWidget next to each other in one horisontal splitter. And the splitter loses it\'s shape, you can know that there is a splitter only by hovering
You can subclass QSplitter and override it's protected virtual QSplitterHandle * QSplitter::createHandle() to return anything that makes you happy.
protected virtual QSplitterHandle * QSplitter::createHandle()
For example, from that overloaded method you can return subclass of QSplitterHandle with custom drawing.
QSplitterHandle