public Diagram(string model, UndoRedo history)
{
Model = model;
History = history;
}
public Diagram(string model, UndoRedo history)
{
Model = model;
History = history;
}
public static UndoRedo Get(ICanvas canvas)
{
var history = canvas.GetTag();
if (history == null)
{
history = new UndoRedo(new Stack<string>(), new Stack<string>());
canvas.SetTag(history);
}
return history as UndoRedo;
}