Hi,

You can achieve similar functionality, by handling the Diagram.ActionRecorded event (you will need to enable undo/redo operations by setting Diagram.UndoManager.UndoEnabled to true), and from the handler saving the diagram state (how to save the diagram state, refer tohttps://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?Serializing_Diagrams.h...). You can then restore the diagram from those snapshot states.

To handle item property changes other than bounds changes, you will need to create ChangeItemCmd instances to record those changes in the UndoManager history and raise the ActionRecorded event. How to do that, you can see here: https://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?CC_Undo_or_Redo_of_Pro...

Regards,
Lyubo
MindFusion

Hi,

First make sure you enable the undo functionality by setting Diagram.UndoManager.UndoEnabled to true. That will enable the undo history and the Diagram.ActionRecorded event, which will be raised on any change that is recorded in the UndoManager's history. From an ActionRecorded event handler, you can save the diagram state at the moment of the change to file or to string, which can be stored at your convenience. The diagram can later be restored to that state by calling the appropriate Load* method. The following code will create separate xml files after each recorded change in the diagram:

diagram.UndoManager.UndoEnabled = true;
diagram.ActionRecorded += Diagram_ActionRecorded;

// ...

private void Diagram_ActionRecorded(object sender, UndoEventArgs e)
{
    var timestamp = DateTime.Now.Ticks.ToString();
    diagram.SaveToXml(string.Format("diagram_state_{0}.xml", timestamp));
} 

To record non-interactive changes to diagram items, you will need to implement ChangeItem commands. How to achieve that (and with examples) is explained in detail here: https://www.mindfusion.eu/onlinehelp/wpfdiagram/index.htm?CC_Undo_or_Redo_of_Pro...

Regards,
Lyubo
MindFusion