Hello,

I have a diagram with custom Nodes, and there might be more than one parent to some nodes,
in the collapse of parent, then then child node is hidden even if there is other link,

I want to validate if there is more than one visible IncommingLinks to the child, then keep the child visible.

I tried to set the visible = true to the child node  in TreeCollapsed handler, but it didn't work.

Tried to implement a custom ExpandButtonClicked, but didn't success.

any help

Hi,

Try handling treeCollapsed event like this -

[code]
function onTreeCollapsed(sender, args)
{
     var node = args.node;
     if (node.collapsedSet)
     {
           node.collapsedSet.forEach(function (item)
           {
                 if (item == node)
                       return;
                 if (DiagramNode.isInstanceOfType(item))
                 {
                       var links = item.incomingLinks;
                       var expandBack = false;
                       links.forEach(function (link)
                       {
                             if (link.getVisible())
                                   expandBack = true;
                       });
                       if (expandBack)
                       {
                             item.setVisible(true);
                             item.expand();
                       }
                 }
           });
     }
}[/code]

Regards,
Slavcho

Thanks dear it worked.

Dear,

I had the same issue when exporting the diagram using PdfExporter, since I had to recreate the diagram in server side, I write a code to re-collapse  collapsed nodes, but I couldn't keep the nodes with multi incoming links

here is my code, where I passed the diagram json value to server

            
Code (]
//Draw diagram
            FillSelectedEntity();

            var json_value = Request.Form["diagram_json"):

;             if (!string.IsNullOrWhiteSpace(json_value))             {                 var j_diagram = Json_Diagram.Deserialize(json_value);                 for (int i = 0; i < this.diagramView.Diagram.Items.Count; i++)                 {                     var t = j_diagram.items.SingleOrDefault(x => x.instanceId == i);                     if (t == null)                         continue;                     var item = this.diagramView.Diagram.Items[i];                     //Node                     if (item.Id != null)                     {                         var n = item as CustomNode;                         n.Move(t.bounds.x, t.bounds.y);                         if (!t.expanded)                             n.Collapse();                     }                 }                 this.diagramView.Diagram.RouteAllLinks();                 ResizeDiagramView();             }

any idea

Instead of rebuilding the diagram, you should be able to send serialized full diagram from client to server. Try calling Diagram.toJson() in JavaScript and DiagramView.LoadFromJson on .NET side, then the visibility of items should be as set in the client-side handler.

Dear,

Thanks for you reply,  but I don't have LoadFromJson function.
I have the following
LoadFromFile
LoadFromStream
LoadFromString
LoadFromXml

It's in DiagramView class, since version 5.7.

Dear,

how to check the current version? and how to upgrade to V 5.7?
I have a licensed version.

Check the readme.txt or properties of diagramming.webforms.dll. If your license was purchased within a year before the v5.7 release, the license key will work for 5.7 too.

after updating, everything worked perfectly.

thanks for your support