private Rectangle2D.Float deriveDrawingRectangle() {
        Rectangle2D.Float origRect = getUserSpaceRectangle();
        Rectangle2D.Float jrect = new Rectangle2D.Float(origRect.x, origRect.y,
                origRect.width, origRect.height);
        jrect.x = 0.0f;
        jrect.y = 0.0f;
        return jrect;
    }