private void RedoLast()
{
if (redoStack.Count > 0)
{
CommandItem ci = redoStack.Peek();
if (!ci.TheRelayCommand.CanExecute(ci.Parm))
{
while (!ci.TheRelayCommand.CanExecute(ci.Parm) && redoStack.Count > 0)
{
ci = redoStack.Pop();
}
}
else if (redoStack.Count > 0)
{
ci = redoStack.Pop();
}
ci.TheRelayCommand.Execute(ci.Parm);
}
}
private void UndoAll()
{
CommandItem li = undoStack.Peek();
while (undoStack.Count > 1)
{
if (li.TheRelayCommand.CanUnExecute(li.Parm))
{
UndoLast();
}
else
{
li = undoStack.Pop();
busTubStack.Push(li);
// Debugger.Break();
}
if (undoStack.Count > 1)
{
li = undoStack.Peek();
}
}
}
private void UndoLast()
{
if (undoStack.Count > 0)
{
//If the next command is new Game Execute And Return
CommandItem li = undoStack.Peek();
if (li.TheRelayCommand.DisplayText == "NewGameCommand")
{
li.TheRelayCommand.Execute(li.Parm);
return;
}
//Some Commands are no longer available for Undo Put them in the BusTub
while (!li.TheRelayCommand.CanUnExecute(li.Parm) && undoStack.Count > 0)
{
if (li.TheRelayCommand.DisplayText != "NewGameCommand")
{
li = undoStack.Pop();
busTubStack.Push(li);
}
li = undoStack.Peek();
}
//Now the next Command is either NewGameCommand or available for re-execution
if (undoStack.Count > 0)
{
li = undoStack.Peek();
if (li.TheRelayCommand.DisplayText != "NewGameCommand")
{
li = undoStack.Pop();
redoStack.Push(li);
li.TheRelayCommand.UnExecute(li.Parm);
}
else
{
li.TheRelayCommand.Execute(li.Parm);
}
}
}
}
private void RaiseNewCommandItemEvent(object o, CommandItem li)
{
OnNewCommandItemEvent(li);
}
private void RaiseRefreshStacksEvent(RelayCommand relayCommand, CommandItem li)
{
OnRefreshStacksEvent(li);
}