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muthuhamid
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Container Node
Apr 14th, 2011 at 9:33am
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Hi Stoyo

How can i make sure that the Node inside a container node, should not be deleted or moved out from the container node by user action. But If user deletes the container node then it should be deleted along with the node inside the container node.

And the node inside the container node should not allowed to resize but if user resize the container node then the node inside the container node also should reflect.


If you paste me the sample code would be Great Thankful.

N.B. : Each Container node will have only one node inside.



Thanks and Best Regards
Hamid
  
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Stoyo
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Re: Container Node
Reply #1 - Apr 14th, 2011 at 10:19am
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Hi Hamid,

You can handle NodeDeleting and NodeModifying like this to prevent deleting and resizing container's children:

Code
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private void diagram_NodeDeleting(object sender, NodeValidationEventArgs e)
{
	ContainerNode container = ContainerNode.GetContainer(e.Node);
	if (container != null)
		e.Cancel = true;
}


This will delete child nodes automatically when a c container is deleted, or you could also delete them from code in response to the container's NodeDeleted:

Code
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private void diagram_ContainerChildAdded(object sender, MindFusion.Diagramming.ContainerChildEventArgs e)
{
	e.Container.SubordinateGroup.AutoDeleteItems = true;
}


This will resize the first child node of a container:
Code
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private void diagram_NodeModifying(object sender, NodeValidationEventArgs e)
{
	ContainerNode container = e.Node as ContainerNode;
	if (container != null && container.SubordinateGroup != null)
	{
		DiagramNode child = container.SubordinateGroup.AttachedNodes[0];
		RectangleF r = container.Bounds;
		r.Inflate(-10, -10);
		child.Bounds = r;
	}
}


I hope that helps,
Stoyan
  
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muthuhamid
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Re: Container Node
Reply #2 - Apr 14th, 2011 at 11:08am
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Hi Stoyo

Thanks a lot for your quick response and that works fine.

I have another question that I Create the link connecting to the Container node in the diagram and when i apply the FlowChart Layout (or any layout), the node inside the container node is moved out.

How can i fix this?

Thanks and Regards
Hamid
  
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Stoyo
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Re: Container Node
Reply #3 - Apr 14th, 2011 at 1:09pm
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Hi Hamid,

I think recent versions don't do that. If you are with an older version, try running the layouts with KeepGroupLayout enabled.

Stoyan
  
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