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chinlean
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UndoManager
Feb 15th, 2007 at 11:58pm
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I am deleting a node from FlowChart.NET and some code was executed to modify predefined data structure (remove something from collection) When I'm undo this opertion using UndoManager.Undo() the node was restored but the data structure is out of sync. Is there any event triggered to the box or is there anywhere i can handle such scenerio? I'm using Flowchart.NET 4.2.1
  
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Stoyo
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Re: UndoManager
Reply #1 - Feb 16th, 2007 at 6:46am
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Hi,

One way to do that is to handle the ActionUndone event. If the command being undone is of type RemoveItemCmd, modify your structure as needed.

It might also be possible to do that by defining a Command-derived class that modifies your data structures. When deleting a box, enclose the fc.DeleteBox call and your command between fc.UndoManager.StartComposite() and composite.Execute().

Stoyan
  
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