/// <summary>
/// 重作到目前狀態
///
/// </summary>
public void reDo()
{
if (RedoStack.Count > 0)
{
gPath tempPath = new gPath();
saveState tempPA;
tempPA = (saveState)RedoStack.Pop();
if (tempPA.currSate >= 0 && tempPA.currSate < FullList.Count)
{
tempPath.copyVal(FullList[tempPA.currSate]);
if (tempPA.Action == 0)
{
sroot.PathList[tempPA.GraphIndex].IsDelete = false;
}
sroot.PathList[tempPA.GraphIndex] = tempPath;
sroot.PathList[tempPA.GraphIndex].redraw(1);
}
else
{
// sroot.PathList.RemoveAt(tempPA.GraphIndex);
}
UndoStack.Push(tempPA);
}
}
/// <summary>
/// 維護 undo stack ,把目前狀態存起來.並清空redo stack,如果之前有undo 動作,是回覆到某一狀態,在此之後的動作都可清除
/// </summary>
/// <param name="Data"></param>
/// <param name="Action"></param>
public void writeIn(gPath Data, int Action)
{
saveState pa;
int lens = RedoStack.Count;
RedoStack.Clear();
FullList.RemoveRange(FullList.Count - lens, lens);
if (Action == 0)//新增動作
{
gPath g = new gPath();
//等一下會加入到list 中,所以count 正好為其在list 所在的位置
pa = new saveState(Action, sroot.PathList.Count, (FullList.Count));
UndoStack.Push(pa);
g.copyVal(Data);
FullList.Add(Data);
sroot.PathList.Add(g);
}
else //修改動作(物件已存在)
{
pa = new saveState(Action, Data.ListPlace, FullList.Count);
FullList.Add(Data);
UndoStack.Push(pa);
}
}
/// <summary>
/// undo 回到前一狀態
/// </summary>
public void unDo()
{
//檢查是否有可undo 的事件
if (UndoStack.Count > 0)
{
gPath tempPath = new gPath();
saveState tempPA;
shapeLib.Data.mClick = 0;
tempPA = (saveState)UndoStack.Pop();
if (tempPA.currSate >= 0 && tempPA.currSate < FullList.Count)
{
if (tempPA.Action == 0)
{
sroot.PathList[tempPA.GraphIndex].IsDelete = true;
}
else
{
//找出前一個state
int i;
for (i = tempPA.currSate - 1; i >= 0; i--)
{
if (FullList[i].ListPlace == tempPA.GraphIndex)
{
tempPath.copyVal(FullList[i]);
sroot.PathList[tempPA.GraphIndex] = tempPath;
sroot.PathList[tempPA.GraphIndex].redraw(1);
break;
}
}
if (i < 0) //something wrong
{
Debug.WriteLine("something wrong");
}
}
}
else
{
//something wrong
Debug.WriteLine("something wrong");
//sroot.PathList.RemoveAt(tempPA.GraphIndex);
}
//將該事件放入redo stack
RedoStack.Push(tempPA);
}
}