[Qt-interest] MainWindow menu hardly responding to mouse events

[Matthias Pospiech]

Matthias Pospiech schrieb:
> I have a small project, which has a MainWindow including a mdiArea and 5 
> actions.
> There are three top level menu entries. The MainWindow is doing nothing 
> activly after startup. It only included signal-slots to the actions in 
> the menu.
>
> However in both debug and release mode I can hardly click on the menu. I 
> checked the qt libs (they are the ones from the sdk with mingw) and 
> recompiled new.
> Now I have no further idea what to check.
>   
Finally I found the problem,
I have a class with inherits from QWidget but is not connected to any 
layout.
This is constructed with the pointer from MainWindow and afterwards not 
touched anymore.

If I move the QWidget to QObject (and derive from QObject) the lagging 
disappears.

The question is still why this is happening.

Matthias