I suppose your ExpandButtonClicked event handler makes them invisible.

Ok, it's your MouseEnter/Leave handlers hiding the nodes when you set the Expanded property of a parent node to false. If you want to change the icon to +/- without collapsing / expanding the whole branch under a node, call the sourceNode.SetExpandedFlag() method instead of setting the property.

Make sure you have removed all assignments to Expanded.

Hi Stoyan,

That expander button visibility issue is now solved.
We are getting two different issues now.

1). While node is selected and selection border is there, node_mouseLeave is getting call but if condition returning false everytime. Due to this my code to hide the button is not getting execute.

code for node_mouseLeave is as follows.

if (sourceNode != null && !sourceNode.ContainsPoint(e.GetPosition(diagram.DocumentPlane)))
  {
 ExpandButtonVisible(sourceNode, false);
  } 

Please suggest, if selection rectangle FALSE the ContainsPoint condition. If this is so what could we do to perform mouseLeave when node is selected.

2). We have anchor point in the node to draw link from this anchor point to another node. When mouse enters and we try to make the link by dragging mouse from this node to another node, ExpanderButton remains visible because in case of dragging, MouseLeave event does'nt get call.

Please suggest for this issue too.


Regards,
Anshul

Hi Stoyan,

We have some ShapeNodes in the diagram. Initially their Expandable property is set to false because we want to show the expand button only when mouse is over the node. we are setting Expandable = true on Node_MouseEnter handler.

It’s working very fine and has no issues.

Now I want to perform zooming on the diagram, I have written code for the same in diagram_MouseWheel handler. When I try to zoom and if mouse is over any node than node fluctuates some up and bottom position. But if I comment Expandable = true(in Node_MouseEnter), everything works fine but not able to see the expand button.

Please suggest if there is any way to avoid fluctuation in this condition.

The problem here is we are using following:

[code]
               diagram.ExpandButtonPosition = ExpandButtonPosition.Custom;
               diagram.CustomExpandButtonPosition = (node) =>
               {
                   Rect expandButtonBounds = node.Bounds;
                   expandButtonBounds.X = expandButtonBounds.Width - 12;
                   expandButtonBounds.Y = expandButtonBounds.Height - 12;
                   expandButtonBounds.Width = expandButtonBounds.Height = 8;
                   return expandButtonBounds;
               };

[/code]

On mouse wheel we zoom the diagram and position of node changes and so in regard to that the expand button position code runs and which cause problem, as it is trying to get the node at previous position.

We have also sent a sample for the same, please have a look into that.

Regards,
Anshul

Hi Stoyan,

We tried
1)."Direct call to GetContentBounds()" and
2)."temporarily switch ExpandButtonPosition to one of the standard values before calling the diagram's GetContentBounds()".

But still the Behavioure is same.
We are sending you the samples with the above implementations, please suggest any other changes required in that.

And please let us know when the next build  will be released with the above fix?

Regards,
Anshul

Thanks Stoyan, its working as expected.

And please let us know when the next build  will be released with the fix?

Regards,
Anshul