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Behavior.Modify still allows creating new links? (Read 2883 times)

AnthonyBrien YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 11 Joined: Feb 5^th, 2008	Behavior.Modify still allows creating new links? Mar 18^th, 2008 at 1:44pm	Print Post
	I have a couple of modes for users to edit my diagram. The diagram consists of custom nodes and link types. * Selection: Nothing can be changed, I just want things to get selected. * Link: Can drag to create links, but cannot move nodes. * Nodes: Can click or drag to create new nodes. I'm not sure how to accomplish this. When I set Behavior = Modify, I can still create links and nodes (of the default type, not my custom type) between my nodes. When I set Behavior = Custom, and CustomLinkType to my custom link class, I can still create nodes (of the default type) and similarly, when I set CustomNodeType, I can still create links (of the default type)! If I set the CustomLinkType or CustomNodeType to null, I get exceptions when I try clicking or dragging on the diagram. So what is the best way to only permit creating nodes, creating links or selecting objects?


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Behavior.Modify still allows creating new link Reply #1 - Mar 18^th, 2008 at 2:19pm	Print Post
	Modify should not let the users create links and nodes, but will still let them move existing items. You could use the following custom behavior class: Code public enum EditMode { Selection, Link, Nodes } public class MyBehavior : LinkNodesBehavior { public MyBehavior(DiagramView view) : base(view) { editMode = EditMode.Selection; } public override InteractionState StartDraw(PointF point) { switch (editMode) { case EditMode.Selection: { return new InteractionState(Diagram.Selection, 8, Action.Create); } break; case EditMode.Link: { DiagramNode node = Diagram.GetNodeAt(point); if (node != null) return base.StartDraw(point); } break; case EditMode.Nodes: { return new InteractionState(CreateNode(), 8, Action.Create); } break; } return null; } protected override DiagramNode CreateNode() { return new ContainerNode(Diagram); } public EditMode EditMode { get { return editMode; } set { editMode = value; } } private EditMode editMode; }


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Behavior.Modify still allows creating new link Reply #2 - Mar 18^th, 2008 at 2:21pm	Print Post
	and then define aMyBehavior myBehavior; member in your form and use it like this private void Form1_Load(object sender, System.EventArgs e) { myBehavior = new MyBehavior(diagramView); diagramView.CustomBehavior = myBehavior; myBehavior.EditMode = EditMode.Nodes; ... } I hope that helps, Stoyan


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AnthonyBrien YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 11 Joined: Feb 5^th, 2008	Re: Behavior.Modify still allows creating new link Reply #3 - Mar 18^th, 2008 at 9:55pm	Print Post
	Sorry, this was a silly mistake on my part, I was resetting the Behavior to LinkContainer in another place in my code. Thanks for the sample custom behavior class, it will make my code cleaner. However I still have an issue, and this one is reproducible in the demo application with the Containers: When you set the Behavior to modify, and have two Containers side by side, selecting them by dragging a selection box around them makes one container child of the other one.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Behavior.Modify still allows creating new link Reply #4 - Mar 19^th, 2008 at 10:04am	Print Post
	This version fixes the selection problem: https://mindfusion.eu/_temp/ctrsel_fix.zip Stoyan


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