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Normal Topic Unfold/Fold ContainerNode (Read 1345 times)
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Unfold/Fold ContainerNode
Apr 28th, 2011 at 11:39am
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Hi

When the user clicks on a ContainerNode to fold/unfold I run a method to shift other ContainerNodes so that they are not eg overlapped by an unfolded ContainerNode.

These operations are caught as different actions by the undomanager (as is expected) but I would like to enable the user to undo them as a single composite action.

Please can you suggest an approach I might take to achieve this.

Thanks
  
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Stoyo
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Re: Unfold/Fold ContainerNode
Reply #1 - Apr 28th, 2011 at 12:10pm
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Hi,

Try merging the undo records, using intermediate composite command to avoid counting the node modification ones:
Code
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private void diagram_ContainerFolded(object sender, NodeEventArgs e)
{
	CompositeCmd cmd = diagram.UndoManager.StartComposite("");

	// shift nodes
	...
	cmd.Execute();
	diagram.UndoManager.History.MergeUndoRecords(2, "Fold container");
}


I hope that helps,
Stoyan
  
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