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matt.s
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Arrow head appearing on centre of node, not edge
Oct 13th, 2008 at 12:51pm
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Hi,

We have a strange problem when creating nodes in our diagram. The behaviour on the diagram is set to DrawLinks.

Basically, when we create a node and link it to a second node, the arrow head points to the outer edge of the of the second node, which is the behaviour we desire.

However, if we link two nodes which are very close together (almost on top of each other) the arrow points to the centre of the second node. Ideally we would want this set to the outer edge if possible.

Is there a way we can achieve this?

I can email screenshots if this doesn't make any sense!

Thanks
Matt
  
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Stoyo
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Re: Arrow head appearing on centre of node, not ed
Reply #1 - Oct 13th, 2008 at 2:48pm
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Hi,

This should happen only when the nodes intersect. Are you using ShapeNodes, or some custom node type?

Stoyan
  
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matt.s
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Re: Arrow head appearing on centre of node, not ed
Reply #2 - Oct 13th, 2008 at 3:50pm
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Hi,

We are using ShapeNode.

The nodes are intersected when the link is made. 

When one of the nodes is pulled away from the first node so they are not intersected the arrow head still points to the middle of the node.
  
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Stoyo
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Re: Arrow head appearing on centre of node, not ed
Reply #3 - Oct 14th, 2008 at 9:16am
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Hi,

If you set link.Dynamic = true, the link ends will align to the node edges when you pull the nodes apart.

Stoyan
  
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matt.s
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Re: Arrow head appearing on centre of node, not ed
Reply #4 - Oct 14th, 2008 at 9:57am
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Hi,

This is exactly what we are after! - Thanks.

One small question; I've just noticed that we can click on each end of the link and detach it away from the node - this behaviour existed before turning Dynamic on. 

Is there any way of preventing the user from dragging the link away?

Thanks
Matt
  
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Stoyo
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Re: Arrow head appearing on centre of node, not ed
Reply #5 - Oct 14th, 2008 at 1:16pm
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Hi,

Set the AllowMoveStart and AllowMoveEnd properties of DiagramLink to false.

I hope that helps,
Stoyan
  
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matt.s
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Re: Arrow head appearing on centre of node, not ed
Reply #6 - Oct 14th, 2008 at 2:44pm
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Hi,

That works a treat!

Thanks for your help.
  
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Paul Eden
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Re: Arrow head appearing on centre of node, not ed
Reply #7 - Oct 15th, 2008 at 1:35pm
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Seconded - top stuff  Smiley


Paul Eden
  
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IgorS
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Re: Arrow head appearing on centre of node, not ed
Reply #8 - Oct 17th, 2008 at 11:02am
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Hi, Stoyan.

Please answer one question, seems to be related. What can I do to reattach links to node border (or anchor points) after node resizing? Now arrowheads can appear inside or outside the node after i call ResizeToFitText method. Thanks a lot.
  
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Stoyo
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Re: Arrow head appearing on centre of node, not ed
Reply #9 - Oct 17th, 2008 at 12:54pm
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Hi Igor,

The links stayed connected to the borders in my test, using ShapeNode.ResizeToFit(KeepRatio). What kind of nodes and links are you using?

Stoyan
  
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IgorS
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Re: Arrow head appearing on centre of node, not ed
Reply #10 - Oct 17th, 2008 at 1:16pm
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Hi,

Just simple ShapeNode's (Rectangle) and default links. I use ShapeNode.ResizeToFit(KeepHeight).
  
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IgorS
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Re: Arrow head appearing on centre of node, not ed
Reply #11 - Oct 17th, 2008 at 1:39pm
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Oh, I found the solution of 2 problems at the same time! Smiley
With simple dummy method:
Code
Select All
	  private void ResizeNode(ShapeNode node)
	  {
		node.ResizeToFitText(FitSize.KeepHeight);
		node.Resize(node.Bounds.Width + 5, node.Bounds.Height);
	  }

i got arrowhead attached to anchors points and "margins" for the node. Smiley
Anyway thanks for reply.
  
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Stoyo
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Re: Arrow head appearing on centre of node, not ed
Reply #12 - Oct 17th, 2008 at 1:55pm
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So ResizeToFitText(KeepHeight) works incorrectly if it does not align the arrowheads. I'll pass this to our developer.
  
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