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:

Qt Code: 
  1. #include <QtGui>
  2.  
  3. class MyLabel : public QLabel
  4. {
  5. public:
  6. 	MyLabel()
  7. 		: timesHidden(0)
  8. 		, timesShown(0)
  9. 	{
  10. 	}
  11. 	void showEvent(QShowEvent*)
  12. 	{
  13. 		timesShown++;
  14. 		QString text;
  15. 		text.sprintf("Times hidden: %d\nTimes Shown: %d", timesHidden, timesShown);
  16. 		setText(text);
  17. 	}
  18. 	void hideEvent(QHideEvent*)
  19. 	{
  20. 		timesHidden++;
  21. 	}
  22. 	int timesHidden;
  23. 	int timesShown;
  24. };
  25.  
  26. int main(int argc, char* argv[])
  27. {
  28. 	QApplication app(argc, argv);
  29. 	QMainWindow window;
  30. 	window.setCentralWidget(new QTextEdit(&window));
  31.  
  32. 	QList<QDockWidget*> dockWidgets;
  33. 	for (int i=1;i<=3;i++){
  34. 		QDockWidget* dock = new QDockWidget(QString::number(i), &window);
  35. 		dock->setWidget(new MyLabel);
  36. 		window.addDockWidget(Qt::BottomDockWidgetArea, dock);
  37. 		dockWidgets << dock;
  38. 	}
  39. 	window.tabifyDockWidget(dockWidgets[1], dockWidgets[2]);
  40.  
  41. 	window.show();
  42. 	return app.exec();
  43. }
To copy to clipboard, switch view to plain text mode