After a bit of searching I found in the Qt examples Main Windows->Dock Widgets the same problem of resizing-hiding-showing the dock widget and getting the original size.
Also http://trolltech.com/developer/task-...ntry&id=173854 and http://trolltech.com/developer/task-...ntry&id=235188
mention a fix scheduled for 4.5.0.

As for setting initial size for the dockWidget I found http://trolltech.com/developer/task-...ntry&id=170298 which doesn't have a fix. All I want to do is to get my dockWidget to expand to full screen (since my central widget is empty).

Can anyone provide any more info or suggestions?