gann-cdf / graphics

public class RoundRectangle extends Drawable2D {

    /**

     * <p>Construct a new round rectangle</p>

     *

     * <p><img src="doc-files/RoundRectangle.png" alt="Diagram of RoundRectangle parameters"></p>

     *

     * <p>All window coordinates are measured in pixels, with the X-axis increasing from left to right and the Y-axis

     * increasing from top to bottom. All window coordinates exist in the first quadrant.</p>

     *

     * <p><img src="../doc-files/window-coordinates.png" alt="Diagram of window coordinates"></p>

     *

     * @param x            coordinate of origin

     * @param y            coordinate of origin

     * @param width        in pixels

     * @param height       in pixels

     * @param arcWidth     in pixels, width of the ellipse that defines the round corners

     * @param arcHeight    in pixels, height of the ellipse that defines the round corners

     * @param drawingPanel on which to draw

     */

    public RoundRectangle(double x, double y, double width, double height, double arcWidth, double arcHeight, DrawingPanel drawingPanel) {

        try {

            setShape(new RoundRectangle2D.Double(x, y, width, height, arcWidth, arcHeight));

            setDrawingPanel(drawingPanel);

        } catch (DrawableException e) {

            System.err.println(e.getMessage());

        }

    }

    protected RoundRectangle2D getShapeAsRoundRectangle() {

        return (RoundRectangle2D) getShape();

    }

    @Override

    public void setShape(Shape shape) throws DrawableException {

        if (shape instanceof RoundRectangle2D) {

            super.setShape(shape);

        } else {

            throw new DrawableException("Attempt to set RoundRectangle's underlying shape to a non-RoundRectangle2D instance");

        }

    }

    /**

     * Width of ellipse defining corners

     *

     * @return Arc width

     * @see RoundRectangle#getArcWidth()

     */

    public double getArcWidth() {

        return getShapeAsRoundRectangle().getArcWidth();

    }

    /**

     * Height of ellipse defining corners

     *

     * @return Arc height

     * @see RoundRectangle#getArcHeight()

     */

    public double getArcHeight() {

        return getShapeAsRoundRectangle().getArcHeight();