Provide a UI designer

What bugs me a little bit about this new (and really cool!) UI toolkit is the fact, that there is no designer available.

I really like WinForms designer and to minor extent the Xcode Interface Builder.

It makes life so much easier in many cases, if you simply can drag widgets to a form and change their properties in a property panel.

I see these options:

• Implement a new designer app
• Create a converter, e.g to convert XIB files, WinForms Designer code etc
• Use existing designers, eg wxFormBuilder or Stetic GTK Designer

This would greatly improve productivity