IsSubGraphExpanded bug?

GoXam
1

Hi Walter

I think I may have encountered another bug regarding groups and the IsSubGraphExpanded property. Consider the following two methods

private void BuildDiagram()
{
var diagram = ctlDiagram;

            diagram.StartTransaction("Test");

            var group = new GraphLinksModelNodeData<string>();
            group.IsSubGraph = true;
            group.Key = "TheGroup";
            group.Text = "Grouper";
            group.IsSubGraphExpanded = false;
            group.Location = new Point(100, 100);
                       

            var n1 = new GraphLinksModelNodeData<string> { Key = "32", Location = new Point(250, 80), Text = "Accounts Payable", SubGraphKey = "TheGroup" };
            var n2 = new GraphLinksModelNodeData<string> { Key = "10", Location = new Point(160, 210), Text = "Administration Expenses", SubGraphKey = "TheGroup" };
            var n3 = new GraphLinksModelNodeData<string> { Key = "22", Location = new Point(330, 210), Text = "Cash", SubGraphKey = "TheGroup" };
            var n4 = new GraphLinksModelNodeData<string> { Key = "16", Location = new Point(183, 329), Text = "Deprecitation", SubGraphKey = "TheGroup" };               

            diagram.Model.AddNode(n1);
            diagram.Model.AddNode(n2);
            diagram.Model.AddNode(n3);
            diagram.Model.AddNode(n4);                

            diagram.Model.AddLink(n1, null, n2, "T");
            diagram.Model.AddLink(n1, null, n3, "T");
            diagram.Model.AddLink(n2, null, n4, "T");



            diagram.Model.AddNode(group);

            diagram.CommitTransaction("Test");                                           
        
    }:

private void ExpandGroup()
{
var diagram = ctlDiagram;
var group = (GraphLinksModelNodeData) diagram.Model.FindNodeByKey(“TheGroup”);

        diagram.StartTransaction("ExpandGroup");

        group.IsSubGraphExpanded = !group.IsSubGraphExpanded;

        diagram.CommitTransaction("ExpandGroup");
    }

Initially I call BuildDiagram() which creates the group and it’s children. It also sets IsSubGraphExpanded = false. This creates the following, which is what I expect:

I then call the ExpandGroup() method, expecting the group node to expand and reveal it’s children. However, the group remains collapsed as in the picture above.

Thanks
Justin

2

Adapting this code in an old version of your app, I found that Group.IsSubGraphExpanded was not being changed at all. I believe the reason is that the binding for it ought to be Mode=TwoWay.

3

Hi Walter

That solved the problem but it seemed to have introduced an unexpected behaviour. The expanded group now renders as follows:

When it should be rendering as follows:

Thanks
Justin

4

OK, we’ll investigate this too.