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Normal Topic ShapeNode Text undo/redo (Read 1955 times)
hhko
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ShapeNode Text undo/redo
Feb 22nd, 2010 at 4:15am
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I chaged ShapeNode of Text.
but. this can't support undo/redo.

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private void DiagramNodeDoubleClickedEvent(object sender, NodeEventArgs e)
	  {
		ShapeNode shape = e.Node as ShapeNode;
		if (shape == null) return;
		shape.Text = "temp";	  //<--- undo/redo?
	  }
  
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Stoyo
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Re: ShapeNode Text undo/redo
Reply #1 - Feb 22nd, 2010 at 10:38am
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Hi,

You must use the ChangeItemCmd class to implement property undo/redo operations. The constructor of the class records the initial state of the item and the Execute method records the final state and adds the ChangeItemCmd object to the undo manager's history:

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ChangeItemCmd propChange = new ChangeItemCmd(shape, "Change");
shape.Text = "temp";
// ... possibly other property assignments
propChange.Execute();


I hope that helps,
Stoyan
  
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