private bool UndoAStep()
{
if (StkUndoStep.Count <= 0)
{
return(false);
}
PlayInfo OldPos = StkUndoStep.Pop();
StkRedoStep.Push(OldPos);
Button btn = MatrixPositions[OldPos.Point.Y][OldPos.Point.X];
btn.BackgroundImage = null;
if (StkUndoStep.Count <= 0)
{
CurrentPlayer = 0;
}
else
{
OldPos = StkUndoStep.Peek();
}
ChangePlayer();
return(true);
}
public bool Undo()
{
if (StkUndoStep.Count <= 1)
{
return(false);
}
PlayInfo OldPos = StkUndoStep.Peek();
CurrentPlayer = OldPos.CurrentPlayer == 1 ? 0 : 1;
bool IsUndo1 = UndoAStep();
bool IsUndo2 = UndoAStep();
return(IsUndo1 && IsUndo2);
}