I have a question about ControlNode drawing.
When I drag and drop, move, or scroll, the drawing of Control in ControlNode is corrupted.

Is there any way to fix or suppress this?

The node in question is configured as follows
CustomContainerNode
  └CustomControlNode
    └Panel
        ├LabelAndRichTextBox(Custom)
        └Label
All backgrounds are transparent.

A sample program is attached.
Select CustomContainerNode from the ListBox at the top of the screen and draw a shape by clicking or dragging and dropping on DiagramView.

And if you don't need any of the RichTextBox mixed text formatting, you could replace it with a ShapeNode and start editing its text by calling DiagramView.BeginEdit(e.Node) from NodeClicked event. Transparency shouldn't be a problem then.

You could modify RtbToBitmap function here to return the rich-text bitmap as a result -

https://social.msdn.microsoft.com/Forums/en-US/1454d078-c312-4741-88df-aa7eb306f...

and then show the bitmap in ShapeNode, TableNode cell or CompositeNode's ImageComponent. Then you'd be able to use actual RichTextBox only as an editor by handling CreateEditControl event.

We especially created CompositeNode class as better alternative to ControlNodes, since latter don't always play nice with rest of the diagram, e.g. don't integrate well in Z order, can't export or print them very precisely, etc. Also performance won't be great once you add more than a few user controls as children of the DiagramView.

Regards,
Slavcho
Mindfusion

Or you could set opaque background for the hosted controls. Your test project at least wasn't showing good reason for background to be transparent. If you really need to blend UI controls, you might also try WPF for better experience (you could host our WPF diagram inside a WinForms application by means of System.Windows.Forms.Integration.ElementHost).

Regards,
Slavcho
Mindfusion

1. You could detect that from NodeClicked event handler:

void OnNodeClicked(object sender, NodeEventArgs e)
{
    var composite = e.Node as CompositeNode;
    if (composite != null)
    {
        var image = composite.GetComponentAt(e.MousePosition) as ImageComponent;
        if (image != null && e.MouseButton == MouseButton.Right)
            ....
    }
} 

So it has to be handled as an Event in DiagramView or Diagram.

Thank you very much.

Regards,.
Nobu