Q:

Open source runtime form designer

I'm searching for an open source runtime form designer (for SCADA, not searching for html designer), which is somewhat similar to modern IDE WYSIWYG's. So far, my list is empty.
Requirements are crossplatform and C++.
Thanks in advance.
UPDATE:
Currently I'm using wxWidgets as the GUI platform. So the possible solutions are either open-source wxWidgets based form designer, or the wxWidgets component/lib.
UPDATE 2:
Found the wxShapeFramework component which is I was looking for. At the moment this is the only option.

A:

I'm going to use wxShapeFramework, which purpose is exactly as described in question (SCADA runtime form designer). Especially because the project is based on wxWidgets.

