Problem while Docking/Undocking of the QDockWidget on the default mainwindow "Central

[franz]

Dock widgets are meant to be used around the central widget. Your implementation more or less asks for quirky behavior... What behavior do you want to achieve? Try to explain without mentioning dock windows. Just make some screen shots and choose a few easy-to-type-about names to clarify. Maybe someone can offer you a better solution to what you're trying to achieve.