/// <summary>
/// Undo last action
/// </summary>
public void Undo()
{
UndoElement element = this.undoManager.Undo();
if (element == null)
{
return;
}
switch (element.BufferOperation)
{
case BufferOperation.Update:
element.CurrentShape = element.OldShape.Copy();
break;
case BufferOperation.Insert:
this.shapes.Remove(element.CurrentShape);
break;
case BufferOperation.Delete:
this.shapes.Add(element.CurrentShape);
break;
default:
break;
}
}
/// <summary>
/// Stores element in the undo/redo buffer
/// </summary>
/// <param name="operation">Operation that will be save for the element</param>
/// <param name="element">Element to be buffered</param>
public void StoreInBuffer(BufferOperation operation, ShapeElement element)
{
UndoElement UndoElement = new UndoElement(element, operation);
this.undoManager.AddItem(UndoElement);
element.UndoShape = element.Copy();
}
