private void calcSize()
    {
        this.getSize().setWidth(this.ItemSize.getWidth() * this.DisplayItems);
        this.getSize().setHeight(this.ItemSize.getHeight());
        this.Matrix.clear();

        for(int x = 0; x < this.DisplayItems; x++)
        {
            Rectangle rect = new Rectangle(x * this.getItemSize().getWidth(), 0, this.getItemSize().getWidth(), this.getItemSize().getHeight());
            this.Matrix.add(rect);
        }

    }