Examples of java.awt.peer.ComponentPeer

java.awt.peer.ComponentPeer
The peer interfaces are intended only for use in porting the AWT. They are not intended for use by application developers, and developers should not implement peers nor invoke any of the peer methods directly on the peer instances.

     * @beaninfo
     *       bound: true
     */
    public void setBackground(Color c) {
        Color oldColor = background;
        ComponentPeer peer = this.peer;
        background = c;
        if (peer != null) {
            c = getBackground();
            if (c != null) {
                peer.setBackground(c);
            }
        }
        // This is a bound property, so report the change to
        // any registered listeners.  (Cheap if there are none.)
        firePropertyChange("background", oldColor, c);

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    public void setFont(Font f) {
        Font oldFont, newFont;
        synchronized(getTreeLock()) {
            oldFont = font;
            newFont = font = f;
            ComponentPeer peer = this.peer;
            if (peer != null) {
                f = getFont();
                if (f != null) {
                    peer.setFont(f);
                    peerFont = f;
                }
            }
        }
        // This is a bound property, so report the change to

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     * @see java.awt.peer.ComponentPeer#getColorModel()
     * @see Toolkit#getColorModel()
     * @since JDK1.0
     */
    public ColorModel getColorModel() {
        ComponentPeer peer = this.peer;
        if ((peer != null) && ! (peer instanceof LightweightPeer)) {
            return peer.getColorModel();
        } else if (GraphicsEnvironment.isHeadless()) {
            return ColorModel.getRGBdefault();
        } // else
        return getToolkit().getColorModel();
    }

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     * @see       Container#validate
     * @since     JDK1.0
     */
    public void validate() {
        synchronized (getTreeLock()) {
            ComponentPeer peer = this.peer;
            boolean wasValid = isValid();
            if (!wasValid && peer != null) {
                Font newfont = getFont();
                Font oldfont = peerFont;
                if (newfont != oldfont && (oldfont == null
                                           || !oldfont.equals(newfont))) {
                    peer.setFont(newfont);
                    peerFont = newfont;
                }
                peer.layout();
            }
            valid = true;
            if (!wasValid) {
                mixOnValidating();
            }

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                g.setClip(0, 0, width, height);
            }
            g.setFont(getFont());
            return g;
        } else {
            ComponentPeer peer = this.peer;
            return (peer != null) ? peer.getGraphics() : null;
        }
    }

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            return (peer != null) ? peer.getGraphics() : null;
        }
    }


    final Graphics getGraphics_NoClientCode() {
        ComponentPeer peer = this.peer;
        if (peer instanceof LightweightPeer) {
            // This is for a lightweight component, need to
            // translate coordinate spaces and clip relative
            // to the parent.
            Container parent = this.parent;
            if (parent == null) return null;
            Graphics g = parent.getGraphics_NoClientCode();
            if (g == null) return null;
            if (g instanceof ConstrainableGraphics) {
                ((ConstrainableGraphics) g).constrain(x, y, width, height);
            } else {
                g.translate(x,y);
                g.setClip(0, 0, width, height);
            }
            g.setFont(getFont_NoClientCode());
            return g;
        } else {
            return (peer != null) ? peer.getGraphics() : null;
        }
    }

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        if (peer instanceof LightweightPeer) {
            Container nativeContainer = getNativeContainer();


            if (nativeContainer == null) return;


            ComponentPeer cPeer = nativeContainer.getPeer();


            if (cPeer != null) {
                cPeer.updateCursorImmediately();
            }
        } else if (peer != null) {
            peer.updateCursorImmediately();
        }
    }

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     */
    void printHeavyweightComponents(Graphics g) {
    }


    private Insets getInsets_NoClientCode() {
        ComponentPeer peer = this.peer;
        if (peer instanceof ContainerPeer) {
            return (Insets)((ContainerPeer)peer).getInsets().clone();
        }
        return new Insets(0, 0, 0, 0);
    }

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     * @param     producer  the image producer
     * @return    the image produced
     * @since     JDK1.0
     */
    public Image createImage(ImageProducer producer) {
        ComponentPeer peer = this.peer;
        if ((peer != null) && ! (peer instanceof LightweightPeer)) {
            return peer.createImage(producer);
        }
        return getToolkit().createImage(producer);
    }

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     * @see #isDisplayable
     * @see GraphicsEnvironment#isHeadless
     * @since     JDK1.0
     */
    public Image createImage(int width, int height) {
        ComponentPeer peer = this.peer;
        if (peer instanceof LightweightPeer) {
            if (parent != null) { return parent.createImage(width, height); }
            else { return null;}
        } else {
            return (peer != null) ? peer.createImage(width, height) : null;
        }
    }

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