Do you use the designer, or do you code your gui manually?

[wysota]

If I want a combobox in a toolbar, for example, I'm out of luck.

True, but this is quite easily implementable, so it's highly probable we'll have access to QWidgetAction objects from Designer.

Or if I want to assign a QIcon with different states to an action, instead of a single image.

I think this one is possible to do with current Designer, but I'd have to check how it assigns icons to widgets.

Or if I want to lay-out the status-bar.

True, but this is easily doable by combining two Designer generated widgets and not more than five lines of code.

Or if I want to set my own central widget.

Hmm... This one you certainly can do within Designer, especially with the help of custom widgets.

The code would be a lot cleaner if you could do more in Designer.

True, but it'd start to get difficult to use the tool.