Designer: How to promote to a existing Qt Widget?

[nightghost]

Good Morning,

I want to insert a QToolBar into my QWidget designed in the Designer. Since there is no direct support for this (except for QMainWindow, but I cant use this) I thought its best to use a normal QWidget and promote it to the QToolBar. But this seems not possible in the designer (4.6.0).

However a can create a Custom Widget based on QToolBar, but I can not select it for promoting, since my Baseclass is QWidget and not QToolBar. For selecting this I need a QToolbar as Base (and this is exacly what I want)