Make a return function button for the operation of ShapeNode - Diagramming Components

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Make a return function button for the operation of ShapeNode (Read 3488 times)

JackPan Full Member Offline I Love MindFusion! Posts: 134 Joined: Apr 9^th, 2020	Make a return function button for the operation of ShapeNode Sep 28^th, 2020 at 6:39am	Print Post
	Hi, there I want to implement a function: When a ShapeNode is created in the figure, all subsequent operations on the ShapeNode will be saved. Just to be able to click the back button to have the function of returning to the previous step of all operations on this ShapeNode. If you keep clicking the return button, the final effect is to return to the time when this ShapeNode was not created. Any assistance would be appreciated. Cheers, Jack


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Lyubo God Member Offline MindFusion team Posts: 511 Joined: Jun 17^th, 2010	Re: Make a return function button for the operation of ShapeNode Reply #1 - Sep 28^th, 2020 at 6:57am	Print Post
	Hi, You can achieve that by using the built-in Undo and Redo functionality. For specifics on how to use it, you can refer to our documentation here: https://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?CC_Undo_and_Redo_0.htm Regards, Lyubo MindFusion


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JackPan Full Member Offline I Love MindFusion! Posts: 134 Joined: Apr 9^th, 2020	Re: Make a return function button for the operation of ShapeNode Reply #2 - Oct 19^th, 2020 at 12:35pm	Print Post
	Hi, Lyubo. I have read the content in the link, but I don't understand it very well. Would you help me write an example for me to learn from? My project needs it very much. Best regards.


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Lyubo God Member Offline MindFusion team Posts: 511 Joined: Jun 17^th, 2010	Re: Make a return function button for the operation of ShapeNode Reply #3 - Oct 22^nd, 2020 at 1:09pm	Print Post
	Hi, This topic explains how to use the UndoManager to enable the undo/redo functionality: https://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?CC_Undo_Manager_0.htm. After the undo history is enabled by setting Diagram.UndoManager.UndoEnabled to true, undoing or redoing interactive changes to diagram items is as easy as calling the Diagram.UndoManager.Undo() and Diagram.UndoManager.Redo() methods respectively. You can call those from button event handlers. If you wish to track property changes to the items set via code, you will need to implement ChangeItem commands. Explanation with examples on how to do that is explained in this documentation topic: https://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?CC_Undo_or_Redo_of_Pro... When changes are recorded in that way, they can be undone/redone the same way as built-in actions - via the Undo/Redo methods on the UndoManager object. Regards, Lyubo MindFusion


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JackPan Full Member Offline I Love MindFusion! Posts: 134 Joined: Apr 9^th, 2020	Re: Make a return function button for the operation of ShapeNode Reply #4 - Oct 23^rd, 2020 at 1:44am	Print Post
	Thank you for giving me such useful material. Best regards to you.


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