protected Size2D drawVertical(Graphics2D g2, Rectangle2D chartArea) {

        double startX = 0.0;
        double topSpace = 0.0;
        double bottomSpace = 0.0;
        double leftSpace = 0.0;
        double rightSpace = 0.0;

        double w = getWidth();
        double h = getHeight();

        RectangleInsets padding = getPadding();
        if (padding != null) {
            topSpace = padding.calculateTopOutset(h);
            bottomSpace = padding.calculateBottomOutset(h);
            leftSpace = padding.calculateLeftOutset(w);
            rightSpace = padding.calculateRightOutset(w);
        }

        if (getPosition() == RectangleEdge.LEFT) {
            startX = chartArea.getX() + leftSpace;
        }
        else {
            startX = chartArea.getMaxX() - rightSpace - w;
        }

        // what is our alignment?
        VerticalAlignment alignment = getVerticalAlignment();
        double startY = 0.0;
        if (alignment == VerticalAlignment.CENTER) {
            startY = chartArea.getMinY() + topSpace
                     + chartArea.getHeight() / 2.0 - h / 2.0;
        }
        else if (alignment == VerticalAlignment.TOP) {
            startY = chartArea.getMinY() + topSpace;
        }
        else if (alignment == VerticalAlignment.BOTTOM) {
            startY = chartArea.getMaxY() - bottomSpace - h;
        }

        g2.drawImage(this.image, (int) startX, (int) startY, (int) w, (int) h,
                null);

        return new Size2D(chartArea.getWidth() + leftSpace + rightSpace,
            h + topSpace + bottomSpace);