Hello,

I am currently evaluating MindFusion.Diagram for a very simple application.  I want to allow a user to create a simple diagram of steps in an assembly process.  I have created a test program that allows adding and deleting steps using ShapeNodes and DiagramLinks.  The user can add a new step by selecting a step on the diagram, and then pressing an "Add before" or "Add after" button.  The user can delete a step by selecting it on the diagram and then pressing "Delete".

My difficulty at this point is that I do not want the user to be able to edit the diagram directly.  I want him to be able to select a step and then do add/delete using buttons which will do these things programmatically.

I want the user to be able only to select a ShapeNode on the diagram.  I do not want him to be able to select the DiagramLinks.

1.) How can I create a diagram that disables all direct modification of the diagram, and enables only node selection?

2.) How can I ensure that a least one ShapeNode is selected at all times?

I have tried various combinations of Diagram.ShapeHandlesStyle, Diagram.LinkHandlesStyle and DiagramView.Behavior, but I can't seem to find the right combination.

Thanks for your help with this.

WTW