Hi,

I've added a key down event on the diagram to let the user move a link's textblock with the arrow keys, by setting the TextBlock.Margin property.

However, when a node connected to the link is moved, the textblock goes back to its original position (center of the link).

Is there a way to keep the textblock's relative position when one of the connecting nodes is moved?

Thank you!

I've subclassed DiagramLink but an exception is thrown when an unconnected link is added..I've been able to reproduce it in a sample application:

1. Add a Diagram and NodeListView with a few shapes on a silverlight page

2. Set the property :

Diagram.AllowUnconnectedLinks = false  

3. Create a custom Link class:

public class LinkBase : DiagramLink
{
    public LinkBase(Diagram diagram) : base(diagram) { }
} 

4. Create a custom behavior class:

public class DiagramBehavior : DrawLinksBehavior
    {
        public DiagramBehavior(Diagram diagram) : base(diagram) { }

        protected override DiagramLink CreateLink(DiagramNode origin, Point point)
        {
            LinkBase link = new LinkBase(Diagram);
            link.Origin = origin;
            return link;
        }
    }
 

5. Add:

diagram.CustomBehavior = new DiagramBehavior(diagram); 

6. Now drag a node on the diagram, and draw a link pointing to nothing. Since AllowUnconnectedLinks is set to false, the link is deleted. However, a null reference is thrown in a method called by MindFusion.Silverlight.Diagram.RemoveItem().

This happens only when subclassing DiagramLink.

Are you able to reproduce this behavior? If so, is there a workaround?

Thanks!

Works great. Thank you for your help!