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.

     * lastDragLocation and dividerSize.
     */
    protected void startDragging() {
        Component       leftC = splitPane.getLeftComponent();
        Component       rightC = splitPane.getRightComponent();
        ComponentPeer   cPeer;


        beginDragDividerLocation = getDividerLocation(splitPane);
        draggingHW = false;
        if(leftC != null && (cPeer = leftC.getPeer()) != null &&
           !(cPeer instanceof LightweightPeer)) {

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  while (heavyParent != null && heavyParent.isLightweight()) {
            heavyParent = heavyParent.getParent();
        }


        if (heavyParent != null) {
            ComponentPeer peer = heavyParent.getPeer();


            if (peer != null && peer.canDetermineObscurity() &&
                                !peer.isObscured()) {
                // The peer says we aren't obscured, therefore we can assume
                // that we won't later be messaged to paint a portion that
                // we tried to blit that wasn't valid.
                // It is certainly possible that when we blited we were
                // obscured, and by the time this is invoked we aren't, but the

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     * lastDragLocation and dividerSize.
     */
    protected void startDragging() {
        Component       leftC = splitPane.getLeftComponent();
        Component       rightC = splitPane.getRightComponent();
        ComponentPeer   cPeer;


        beginDragDividerLocation = getDividerLocation(splitPane);
        draggingHW = false;
        if(leftC != null && (cPeer = leftC.getPeer()) != null &&
           !(cPeer instanceof LightweightPeer)) {

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    public synchronized void setComponent(Component c) {
  if (component == c || component != null && component.equals(c))
      return;
  
  Component     old;
  ComponentPeer oldPeer = null;


  if ((old = component) != null) {
      clearAutoscroll();


      component = null;

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            return false;
        }


        graphicsConfig = gc;


        ComponentPeer peer = getPeer();
        if (peer != null) {
            return peer.updateGraphicsData(gc);
        }
        return false;
    }

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    @Deprecated
    public void enable() {
        if (!enabled) {
            synchronized (getTreeLock()) {
                enabled = true;
                ComponentPeer peer = this.peer;
                if (peer != null) {
                    peer.setEnabled(true);
                    if (visible) {
                        updateCursorImmediately();
                    }
                }
            }

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                    // fails, we want the focus to stay on the disabled
                    // Component so that keyboard traversal, et. al. still
                    // makes sense to the user.
                    transferFocus(false);
                }
                ComponentPeer peer = this.peer;
                if (peer != null) {
                    peer.setEnabled(false);
                    if (visible) {
                        updateCursorImmediately();
                    }
                }
            }

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    public void show() {
        if (!visible) {
            synchronized (getTreeLock()) {
                visible = true;
                mixOnShowing();
                ComponentPeer peer = this.peer;
                if (peer != null) {
                    peer.setVisible(true);
                    createHierarchyEvents(HierarchyEvent.HIERARCHY_CHANGED,
                                          this, parent,
                                          HierarchyEvent.SHOWING_CHANGED,
                                          Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK));
                    if (peer instanceof LightweightPeer) {

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                visible = false;
                mixOnHiding(isLightweight());
                if (containsFocus() && KeyboardFocusManager.isAutoFocusTransferEnabled()) {
                    transferFocus(true);
                }
                ComponentPeer peer = this.peer;
                if (peer != null) {
                    peer.setVisible(false);
                    createHierarchyEvents(HierarchyEvent.HIERARCHY_CHANGED,
                                          this, parent,
                                          HierarchyEvent.SHOWING_CHANGED,
                                          Toolkit.enabledOnToolkit(AWTEvent.HIERARCHY_EVENT_MASK));
                    if (peer instanceof LightweightPeer) {

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     * @see #getForeground
     * @since JDK1.0
     */
    public void setForeground(Color c) {
        Color oldColor = foreground;
        ComponentPeer peer = this.peer;
        foreground = c;
        if (peer != null) {
            c = getForeground();
            if (c != null) {
                peer.setForeground(c);
            }
        }
        // This is a bound property, so report the change to
        // any registered listeners.  (Cheap if there are none.)
        firePropertyChange("foreground", oldColor, c);

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