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darrenwwwa
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Cannot create outgoing or incoming links
Jul 15th, 2009 at 11:02am
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Hey,
I have having an annoying problem.

I am using WPFDiagram version 2.1.2.26299

I create the new node this way:
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Point position = new Point((node.Bounds.Left * diagram.ZoomFactor / 100) + nodeWidth + 100,
                                    node.Bounds.Top * diagram.ZoomFactor / 100 + nodeHeight / 2);

Size nodeSize = new Size(nodeWidth, nodeHeight);

newNode = d.Factory.CreateTableNode(position, nodeSize);

DiagramLink newLink = diagram.Factory.CreateDiagramLink(originNode, newNode);


Creating it works find. The generated links works well.

When I try to add a new link thru the UI, it will not allow me.
The properties are:
* AllowIncomingLink = true
* AllowOutgoingLink = true
* AllowDrop = true
* Lock = false

I can add new nodes by dragging them onto the diagram and I am able to add links to these. Just not to the nodes I create programmatically.

I can't figure it out.

Darren
  
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Stoyo
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Re: Cannot create outgoing or incoming links
Reply #1 - Jul 15th, 2009 at 12:56pm
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Is Diagram.Behavior set to LinkTables?
  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #2 - Jul 15th, 2009 at 1:05pm
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No. It is set to DrawLinks.
  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #3 - Jul 15th, 2009 at 1:14pm
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That was not the problem. I chagned the Behavior to Link tables and I was still not able to create links from any of the programmatically created nodes.
  
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Stoyo
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Re: Cannot create outgoing or incoming links
Reply #4 - Jul 15th, 2009 at 1:18pm
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Are you handling InitializeNode or NodeCreated? What kind of properties are you setting there?
« Last Edit: Jul 15th, 2009 at 2:47pm by Stoyo »  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #5 - Jul 15th, 2009 at 1:54pm
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No I am not handling either of those events.

This is all I am setting on the new node:
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newNode.Style = TableStyle.RoundedRectangle;
		newNode.CellFrameStyle = CellFrameStyle.None;
		newNode.CellCustomDraw = CustomDraw.None;
		newNode.AllowDrop = true;
		newNode.AllowIncomingLinks = true;
		newNode.AllowOutgoingLinks = true;
		newNode.AnchorPattern = kbaAnchorPattern;
  
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Stoyo
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Re: Cannot create outgoing or incoming links
Reply #6 - Jul 15th, 2009 at 2:49pm
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Could you copy your Diagram initialization code here?
  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #7 - Jul 15th, 2009 at 3:37pm
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Diagram d = new Diagram();
		d.NodeActivated += new NodeEventHandler(diagram_NodeActivated);
		d.NodeDeactivated += new NodeEventHandler(diagram_NodeDeactivated);
		d.NodeDeleting += new NodeValidationEventHandler(diagram_NodeDeleting);
		d.NodeClicked += new NodeEventHandler(diagram_NodeClicked);
		d.NodeDoubleClicked += new NodeEventHandler(diagram_NodeDoubleClicked);
		d.LinkCreated += new LinkEventHandler(diagram_LinkCreated);
		d.LinkDeleting += new LinkValidationEventHandler(diagram_LinkDeleting);
		d.LinkClicked += new LinkEventHandler(diagram_LinkClicked);
		d.LinkDeselected += new LinkEventHandler(diagram_LinkDeselected);
		d.DragOver += new DragEventHandler(diagram_DragOver);
		d.Drop += new DragEventHandler(diagram_Drop);
		d.LinkHeadShape = ArrowHead.Triangle;
		d.Bounds = new Rect(0, 0, diagramWidth, diagramHeight);
		d.ShowGrid = true;
		d.GridSizeX = 15;
		d.GridSizeY = 15;
		d.AlignToGrid = true;
		d.ShowAnchors = ShowAnchors.Auto;
		d.AllowDrop = true;
		d.AllowUnanchoredLinks = false;
		d.AllowUnconnectedLinks = false;
		d.Behavior = Behavior.DrawLinks;
  
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Stoyo
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Re: Cannot create outgoing or incoming links
Reply #8 - Jul 15th, 2009 at 4:00pm
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It might not work because of the d.AllowUnanchoredLinks = false assignment, if the tables do not have any anchor points defined for them. If the tables' ConnectionStyle is set to Rows, you will have to set the AnchorPattern property of rows rather than the table's one.
  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #9 - Jul 16th, 2009 at 3:20pm
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Thanks for the help so far.

I changed the 'AllowUnanchoredLinks' to 'true' and I can place ancors.
However, now they do not move with the tableNode when I move the node. Also, they do not attach themselves to the anchor points that I specified.

While debuggin, I see that the 8 anchor points I added are there. I compared it during debug to a table node I dragged and dropped onto the diagram and the anchor points are the same.

The connection style is set to 'both'. This setting works on both the good nodes (the ones I drag onto the diagram) and the bad ones (the programmatically crated ones that don't allow me to add links).

Any suggestions?
  
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darrenwwwa
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Re: Cannot create outgoing or incoming links
Reply #10 - Jul 17th, 2009 at 6:21am
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Hey,
I double checked again and indeed the ConnectionStyle was set to Rows, when it should have been set to Both. I thought I checked this before, but I guess my eyes were closed.

Now I know what the ConnectionStyle is for. Smiley

Thanks!
Darren
  
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