hideEvent not propagated to tabified dock widgets

I am trying to catch the hide/show events in a widget which has been placed in a QDockWidget. The problem is that after I tabify the Dockwidget, it doesn't get those notifications anymore when I switch tabs. This behaviour differs from that of an ordinary QTabWidget.

I am using Qt 4.3.0 at the moment and I would like to know if this is wanted behaviour, or if it has been fixed in the 4.4 branch, otherwise I'll file a bug report.

Here is an example to test the behaviour:

Code:

---

#include <QtGui>
 
class MyLabel : public QLabel
{
public:
	MyLabel()
		: timesHidden(0)
		, timesShown(0)
	{
	}
	void showEvent(QShowEvent*)
	{
		timesShown++;
		QString text;
		text.sprintf("Times hidden: %d\nTimes Shown: %d", timesHidden, timesShown);
		setText(text);
	}
	void hideEvent(QHideEvent*)
	{
		timesHidden++;
	}
	int timesHidden;
	int timesShown;
};
 
int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
	QMainWindow window;
	window.setCentralWidget(new QTextEdit(&window));
 
	QList<QDockWidget*> dockWidgets;
	for (int i=1;i<=3;i++){
		QDockWidget* dock = new QDockWidget(QString::number(i), &window);
		dock->setWidget(new MyLabel);
		window.addDockWidget(Qt::BottomDockWidgetArea, dock);
		dockWidgets << dock;
	}
	window.tabifyDockWidget(dockWidgets[1], dockWidgets[2]);
 
	window.show();
	return app.exec();
}

---

So, should I consider this a bug? I would really appreciate if somebody would test it.

I haven't had time to look into it, but perhaps you could use QDockWidget::visibilityChanged()?