Hello, I'm attempting to add a custom anchor point for a DiagramNodeAdapter, but it doesn't seem to be working for me.

I'm adding a callback to the DrawAnchorPoint event of the Diagram, and the callback is being called, but the custom anchor (red circle) I'm drawing doesn't show up on the DiagramNodeAdapter nodes. I also have ContainerNodes in the diagram, and the custom anchor draws fine for them.

Here is the code, though there isn't much to it:

diagram.DrawAnchorPoint += new EventHandler<DrawAnchorPointEventArgs>(DrawAnchorPoint);

        void DrawAnchorPoint(object sender, DrawAnchorPointEventArgs e)
        {
            e.Graphics.DrawEllipse(Brushes.Red, new Pen(), new Point(0, 0), 10, 10);
        }

Is there a property or something simple I'm missing to get this to work for DiagramNodeAdapter nodes?

Any help would be greatly appreciated.

Thanks!

Thanks for the fast reply!

I'm using a custom WPF UserControl (inheriting from System.Windows.Controls.UserControl).I set ShowAnchors = Always on the Diagram as per your advice.

I tried it with a Button and received the same result. Here is the code I used to accomplish that:

System.Windows.Controls.Button testButton = new System.Windows.Controls.Button();
DiagramNodeAdapter testButtonNode = new DiagramNodeAdapter(testButton);
diagram.Nodes.Add(testButtonNode);

I've attached a screenshot of the Diagram showing my custom node, my DiagramNodeAdapter containing a button, and a (working) ContainerNode.

This turned out to be developer error regarding the positioning of the anchors. They were large enough values as to result in the anchor points being well out of the bounds of the control.

Thanks for your help!