Hi !

I am facing a very big problem in layouting, the diagram nodes are not rendered as expected. Here is what I do:

1. On Pageload, I invoke a http request which returns me an XML with a list of nodes and links.

2. First, I parse these Nodes on the SL client, and create all the ShapeNodes one by one and add them to the diagram Nodes collection

3. Then I parse the Links on the SL client, and create all the Links one by one and add them to the diagram Links collection. The links are created between the shapenodes created on step 2.

4. After all the nodes and links are added, I call one of the layouting algorithm to render the diagram layout like this:
     ILayout layout = new MindFusion.Diagramming.Silverlight.Layout.TreeLayout();
(layout as TreeLayout).Type = TreeLayoutType.Radial;
layout.Arrange(graphCanvas);
graphCanvas.ResizeToFitItems(0, true);

5. When the diagram comes on the screen, it looks all messed up and overlapped etc.

What could be the problem  ???, any help please?
I have a urgent requirement to fix this issue.

Thanks,
Amit

Yes they do have.
Infact, If I add the Nodes and their corresponding links simultaneously, the layouting is perfect.
For eg if I have 4 nodes N1..N4,
Then I add N1, and N2,
add a link from N2<-N1,
add Node N3
add a link from N2<-N3, N3->N1
add Node N4
add a link from N4<-N3

It looks fine. But If I add all the nodes to the diagram N1 to N4, then add the links in the end, it gets messed up.

Actually it might still be considered a tree if you use the IgnoreLinkDirection option, as long as there are no cycles in the graph.

Stoyan

It's a property of TreeLayout.

When IgnoreLinkDirection is enabled, the algorithm cannot find a root node for the tree automatically, so you should explicitly set TreeLayout.Root.

TreeLayout was designed to arrange trees and cannot process graphs with cycles. Try LayeredLayout or AnnealLayout to arrange arbitrary graphs.

Stoyan

There's an internal PathFinder method you could use to detect cycles. We'll make it public for the 1.0.3 release.

Regards,
Stoyan