private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
history.Do(new AddShapeMemento());
shapepool.Add(GetShape(e));
}
else if (e.Button == MouseButtons.Right)
{
List <Shape> toBeRemoved = new List <Shape>();
Rectangle rect = GetRect(e);
foreach (Shape s in shapepool)
{
if (rect.Contains(s.Bound))
{
toBeRemoved.Add(s);
}
}
if (toBeRemoved.Count > 0)
{
history.BeginCompoundDo();
foreach (Shape s in toBeRemoved)
{
int index = shapepool.IndexOf(s);
history.Do(new RemoveShapeMemento(index, s));
shapepool.RemoveAt(index);
}
history.EndCompoundDo();
}
}
Invalidate();
}
public override IMemento <ShapePool> Restore(ShapePool target)
{
int index = target.Count - 1;
IMemento <ShapePool> inverse = new RemoveShapeMemento(index, target[index]);
target.RemoveAt(target.Count - 1);
return(inverse);
}
public override IMemento <ShapePool> Restore(ShapePool target)
{
Shape removed = target[index];
IMemento <ShapePool> inverse = new RemoveShapeMemento(index, removed);
target.RemoveAt(index);
return(inverse);
}