A few improvements are planned for the QmlRenderWindowItem:

• make the color frame configurable (color, visiblity) with a Q_PROPERTY and keep this synchronized with the value from BaseRenderer::GetCurrentWorldGeometry2DNode()
• add methods to enable the easy activation and deactivation of reference lines from other BaseRenderers, similar to what is already done in the four window example
• verify correct behaviour for event handling, i.e. equal to QmitkRenderWindow
• verify resize behaviour in different layouts