/// <summary>
/// 注销撤销实体方法
/// </summary>
/// <param name="regEnt"></param>
public void Unregister(UndoRedoHandler handler)
{
if (!Handlers.Contains(handler))
{
Handlers.Remove(handler);
}
}
/// <summary>
/// 状态改变
/// </summary>
public void RefreshStatus(UndoRedoHandler handler)
{
bool isReachedBegin = true;
bool isReachedEnd = true;
for (var i = 0; i < historyList.Count; i++)
{
if (historyList[i].id == _currentHistoryId)
{
if ((i - 1) >= 0)
{
isReachedBegin = false;
}
if ((i + 1) < historyList.Count)
{
isReachedEnd = false;
}
if (historyList[i].lockkey != null && historyList[i].lockkey == handler.LockKey)
{
isReachedBegin = true;
}
break;
}
}
handler.ReachedBegin = isReachedBegin;
handler.ReachedEnd = isReachedEnd;
handler.RefreshButtonStatusEventHandler?.Invoke();
}
/// <summary>
/// 注册撤销实体方法
/// </summary>
/// <param name="regEnt"></param>
public void Register(UndoRedoHandler handler)
{
//注册当前锁定标识位
for (var i = 0; i < historyList.Count; i++)
{
var ent = historyList[i];
if (ent.id == _currentHistoryId)
{
ent.lockkey = handler.LockKey;
break;
}
}
if (!Handlers.Contains(handler))
{
Handlers.Add(handler);
}
}
static UndoRedoHandler()
{
MainInstance = new UndoRedoHandler();
}