public void RecordStateBefore(Canvas canvas) { CanvasState canvasState = new CanvasState(canvas); UndoStack.Push(new BufferState()); UndoStack.Peek().Before = canvasState; RedoStack.Clear(); }
public void RecordStateAfter(Canvas canvas) { CanvasState canvasState = new CanvasState(canvas); UndoStack.Peek().After = canvasState; }