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Normal Topic TreeLayout and negative Coordinates (Read 2798 times)
Gabriel
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TreeLayout and negative Coordinates
Jan 24th, 2014 at 12:31pm
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Hello,
I have a flowchart where I'm allowing to expand the canvas in all directions, so the nodes could have negative coordinates.
However when I apply a Treelayout to the flowchart, the nodes are always placed on the positive region of the canvas, so the root node is moved also even if "keeprootposition" flag is turned to yes.

Is there any way to allow the Treelayout to have nodes on with negative coordinates?

Thank you
Gabriel
  
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Stoyo
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Re: TreeLayout and negative Coordinates
Reply #1 - Jan 24th, 2014 at 2:55pm
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Hi,

This leaves the root at negative coordinates in my test project:
Code
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private void diagram_NodeClicked(object sender, NodeEventArgs e)
{
	var layout = new TreeLayout();
	layout.Root = e.Node;
	layout.KeepRootPosition = true;
	layout.LinkStyle = TreeLayoutLinkType.Cascading3;
	layout.Arrange(diagram);
}




What TreeLayout settings are you using?

Stoyan
  
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Gabriel
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Re: TreeLayout and negative Coordinates
Reply #2 - Jan 27th, 2014 at 7:13am
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Hello these are my config parameters:

Code
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 MindFusion.Diagramming.Layout.TreeLayout treeLayout =

new MindFusion.Diagramming.Layout.TreeLayout(
                                                                              node,
                                                                              MindFusion.Diagramming.Layout.TreeLayoutType.Centered,
                                                                              false,
                                                                              MindFusion.Diagramming.Layout.TreeLayoutLinkType.Cascading3,
                                                                              MindFusion.Diagramming.Layout.TreeLayoutDirections.TopToBottom,
                                                                              levelDistance,
                                                                              nodeDistance,
                                                                              true,
                                                                              new SizeF(10, 10))
                                                                              {
                                                                                  EnableAssistants = true,
                                                                                  CompactAssistants = true,
                                                                              };
  
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Stoyo
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Re: TreeLayout and negative Coordinates
Reply #3 - Jan 27th, 2014 at 11:29am
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That works as well in my test project. What version of the control are you using?
  
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Gabriel
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Re: TreeLayout and negative Coordinates
Reply #4 - Jan 27th, 2014 at 2:10pm
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Hello,

I'm using the 5.8.23715 version of the dll
  
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Stoyo
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Re: TreeLayout and negative Coordinates
Reply #5 - Jan 27th, 2014 at 6:08pm
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I have installed version 5.8 and changed the rearrange method in TreeLayout sample project to this:

Code
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private void rearrange()
{
	rootNode.Move(-300,-300);
	MindFusion.Diagramming.Layout.TreeLayout treeLayout =
		new MindFusion.Diagramming.Layout.TreeLayout(
		  rootNode,
		  MindFusion.Diagramming.Layout.TreeLayoutType.Centered,
		  false,
		  MindFusion.Diagramming.Layout.TreeLayoutLinkType.Cascading3,
		  MindFusion.Diagramming.Layout.TreeLayoutDirections.TopToBottom,
		  10,
		  5,
		  true,
		  new SizeF(10, 10))
	{
		EnableAssistants = true,
		CompactAssistants = true,
	};
	treeLayout.Arrange(diagram);

	diagram.ResizeToFitItems(5);
	rootNode.Text = rootNode.Bounds.Location.ToString();
}


The root node shows location -300,-300, so that seems to work correctly. Check if you don't have some code running after TreeLayout.Arrange that moves the diagram elements back to positive coordinates.

I hope that helps,
Stoyan
  
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