133     /*

   134      * This method is called from XWindowPeer.displayChanged, when

   135      * the window this Panel is on is moved to the new screen, or

   136      * display mode is changed.

   137      *

   138      * The notification is propagated to the child Canvas components.

   139      * Top-level windows and other Panels are notified too as their

   140      * peers are subclasses of XCanvasPeer.

   141      */

   142     public void displayChanged(int screenNum) {

   143         super.displayChanged(screenNum);

   144         displayChanged((Container)target, screenNum);

   145     }

   146 

   147     /*

   148      * Recursively iterates through all the HW and LW children

   149      * of the container and calls displayChanged() for HW peers.

   150      * Iteration through children peers only is not enough as the

   151      * displayChanged notification may not be propagated to HW

   152      * components inside LW containers, see 4452373 for details.

   153      */

   154     private static void displayChanged(Container target, int screenNum) {

   155         Component children[] = ((Container)target).getComponents();

   156         for (Component child : children) {

   157             ComponentPeer cpeer = child.getPeer();

   158             if (cpeer instanceof XCanvasPeer) {

   159                 ((XCanvasPeer)cpeer).displayChanged(screenNum);

   160             } else if (child instanceof Container) {

   161                 displayChanged((Container)child, screenNum);

   162             }

   163         }

   164     }

   165