public void SaveState(Originator orig)
{
_mementos.Push(orig.CreateMemento());
}
public void TakeSnapshot(PictureBox pictureBox)
{
Bitmap bit = new Bitmap(pictureBox.Image);
_orginator = new Originator(bit, pictureBox.Height, pictureBox.Width);
_history.SaveState(_orginator);
}
public void RestoreState(Originator orig)
{
if(_mementos.Count > 1)
orig.SetMemento(_mementos.Pop());
}