public void InsertMementoForUndoRedo(MemMemento memento)
{
if (memento != null)
{
UndoStack.Push(memento);
RedoStack.Clear();
}
}
public MemMemento CloneMemento(MemMemento mem)
{
List <ObjectShape> objectShapes = new List <ObjectShape>();
foreach (ObjectShape obj in mem.getSavedObject())
{
ObjectShape newObj = (ObjectShape)obj.Clone();
objectShapes.Add(newObj);
}
return(new MemMemento(objectShapes));
}
public MemMemento getRedoMemento()
{
if (RedoStack.Count != 0)
{
MemMemento m = RedoStack.Pop();
UndoStack.Push(m);
return(m);
}
else
{
return(null);
}
}
public void Redo(int level)
{
MemMemento memento = null;
for (int i = 1; i <= level; i++)
{
memento = careTaker.getRedoMemento();
}
if (memento != null)
{
mementoOriginator.setMemento(memento);
}
}
public void setMemento(MemMemento memento)
{
MemMemento curMem = CloneMemento(memento);
canvasState.setObjectShapes(curMem.getSavedObject());
}
public void SetStateForUndoRedo()
{
MemMemento memento = mementoOriginator.getMemento();
careTaker.InsertMementoForUndoRedo(memento);
}