protected override void Execute()
{
if (_activeContent != null)
{
_activeContent.Undo();
}
}
public void Undo()
{
if (undoStack.Count == 0)
{
return;
}
IUndoable <T> action = undoStack.Pop();
T obj = action.Undo();
if (ReferenceEquals(action, undoCleanAction))
{
fileIsClean.OnNext(Unit.Default);
}
affectedObject.OnNext(obj);
AddRedo(action);
if (undoStack.Count == 0)
{
NotifyUndoUnavailable();
}
else
{
undoDescription.OnNext(undoStack.Peek().Description);
}
}
/// <summary>
/// Undo the last action.
/// </summary>
public void Undo()
{
if (UndoableActions.Count > 0)
{
IUndoable action = UndoableActions.Pop();
action.Undo();
RedoableActions.Push(action);
}
}
/// <summary>
/// 执行撤销操作
/// </summary>
public virtual void Undo(XUndoEventArgs args)
{
for (int iCount = myItems.Count - 1; iCount >= 0; iCount--)
{
IUndoable undo = ( IUndoable )myItems[iCount];
undo.InGroup = true;
undo.Undo(args);
//( ( IUndoable )myItems[ iCount ]).Undo();
}
}
public bool Undo()
{
bool result = undoStack.Count > 0;
if (result)
{
IUndoable c = undoStack.Pop();
redoStack.Push(c);
c.Undo();
}
return(result);
}
public void UndoCommand()
{
if (commandHistory.Count == 0)
{
return;
}
IUndoable lastCommand = commandHistory.Pop() as IUndoable;
if (lastCommand != null)
{
lastCommand.Undo();
}
}
/// <summary>
/// Undoes the last done command
/// </summary>
public void Undo()
{
if (undoStack.Count > 0)
{
IUndoable command = undoStack.Last.Value;
if (command.CanUndo)
{
command.Undo();
undoStack.RemoveLast();
redoStack.AddLast(command);
}
else
{
#if DEBUG
// WHY CANT UNDO?
System.Diagnostics.Debugger.Break();
#endif
}
}
}
/// <summary>
/// If possible, undo the top action on the undo stack.
/// The action is moved onto the redo stack
/// If not possible, throws an InvalidOperationException
/// </summary>
public void Undo()
{
if (!CanUndo)
{
throw new InvalidOperationException();
}
IUndoable action = undos.Pop();
action.Undo();
redos.Push(action);
if (savepoint.HasValue)
{
// it will now take one more "redo" to reach the save point
savepoint++;
}
NotifyAllProps();
}
/// <summary>
/// 执行一次撤销操作
/// </summary>
public void Undo(XUndoEventArgs args)
{
if (intPosition < 0)
{
return;
}
bool back = bolLock;
this.bolLock = true;
try
{
IUndoable undo = this.Current;
intPosition--;
if (undo != null)
{
undo.Undo(args);
}
OnStateChanged();
}
finally
{
bolLock = back;
}
}
public void Do()
{
_undoable.Undo();
}
public void Redo()
{
iud.Undo();
}