Examples of java.awt.EventQueue

java.awt.EventQueue
EventQueue is a platform-independent class that queues events, both from the underlying peer classes and from trusted application classes.
It encapsulates asynchronous event dispatch machinery which extracts events from the queue and dispatches them by calling {@link #dispatchEvent(AWTEvent) dispatchEvent(AWTEvent)} methodon this EventQueue with the event to be dispatched as an argument. The particular behavior of this machinery is implementation-dependent. The only requirements are that events which were actually enqueued to this queue (note that events being posted to the EventQueue can be coalesced) are dispatched:

Sequentially.
That is, it is not permitted that several events from this queue are dispatched simultaneously.
In the same order as they are enqueued.
That is, if AWTEvent A is enqueued to the EventQueue before AWTEvent B then event B will not be dispatched before event A.

Some browsers partition applets in different code bases into separate contexts, and establish walls between these contexts. In such a scenario, there will be one EventQueue per context. Other browsers place all applets into the same context, implying that there will be only a single, global EventQueue for all applets. This behavior is implementation-dependent. Consult your browser's documentation for more information.
For information on the threading issues of the event dispatch machinery, see AWT Threading Issues. @author Thomas Ball @author Fred Ecks @author David Mendenhall @version 1.105, 07/11/06 @since 1.1

                screenSize.width = config.getConfig().getScreenWidth();
                screenSize.height = config.getConfig().getScreenHeight();


                //drawStartupScreen();


                final EventQueue eventQueue = getSystemEventQueueImpl();
                this.keyboardHandler = new KeyboardHandler(eventQueue);
                this.mouseHandler = new MouseHandler(fbDevice.getDevice(),
                    screenSize, eventQueue, keyboardHandler);
                keyboardHandler.install();

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        // TODO Auto-generated method stub


    }


    public void wakeNativeQueue() {
        final EventQueue q = this.waitingNativeQueue;
        if (q != null) {
            synchronized (q) {
                q.notifyAll();
            }
        }
    }

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        }
        getSystemEventQueueImpl().postEvent(event);
    }


    public static void postToTarget(ComponentEvent event, Component target) {
        EventQueue queue;
        AppContext ac = SunToolkit.targetToAppContext(target);
        if (ac == null) {
            queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
        } else {
            queue = (EventQueue) ac.get(sun.awt.AppContext.EVENT_QUEUE_KEY);
            if (queue == null) {
                queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
            }
        }


        queue.postEvent(event);
    }

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            }
        }
    }


    private void waitForIdleEventQueue() {
        EventQueue queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
        while (queue.peekEvent() != null) {
            try {
                sleep(eqSleepTime);
            }
            catch (InterruptedException ie) {
            }

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  public void close(Window w) {
    WindowEvent event = new WindowEvent(w, WINDOW_CLOSING);
    // If the window contains an applet, send the event on the applet's queue instead to ensure a shutdown from the
    // applet's context (assists AppletViewer cleanup).
    Component applet = findAppletDescendent(w);
    EventQueue eventQueue = windowMonitor.eventQueueFor(applet != null ? applet : w);
    eventQueue.postEvent(event);
    waitForIdle();
  }

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  final Map<Component, WeakReference<EventQueue>> queueMap = new WeakHashMap<Component, WeakReference<EventQueue>>();


  @RunsInCurrentThread
  void addQueueFor(Component c) {
    EventQueue queue = c.getToolkit().getSystemEventQueue();
    queueMap.put(c, new WeakReference<EventQueue>(queue));
  }

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  }


  Collection<EventQueue> eventQueues() {
    Set<EventQueue> eventQueues = new HashSet<EventQueue>();
    for (WeakReference<EventQueue> reference : queueMap.values()) {
      EventQueue queue = queueFrom(reference);
      if (queue != null) eventQueues.add(queue);
    }
    return eventQueues;
  }

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                .getPreferredScrollableViewportSize());
    }


    private void waitUntilEventQueueIsEmpty() throws InterruptedException, InvocationTargetException {
        // we have to sleep here until the asynchronously attachement of JLayeredPane and the overlay is finished
        EventQueue eventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
        AWTEvent peekEvent;
        while((peekEvent = eventQueue.peekEvent()) != null) {
            System.out.println("got event in queue: " + peekEvent);
            Thread.currentThread().sleep(0);
        }
        // Added 10/10/07 AlD: Sometimes the above loop fails to work!?  This
        // should further ensure the event loop is empty.

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    dispatch(new GUIEvent<Type>(id, event, data));
  }
  
  public void dispatch(GUIEvent<Type> event)
  {
    EventQueue eventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
    
    for (Component target : targets)
    {
      GUIEvent<Type> eventCopy = event.copy();
      eventCopy.setSource(target);
      
      eventQueue.postEvent(eventCopy);
    }    
  }

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    private synchronized void startModal() {


    try {
            if (SwingUtilities.isEventDispatchThread()) {
                EventQueue theQueue = getToolkit().getSystemEventQueue();
                while (isVisible()) {
                    AWTEvent event = theQueue.getNextEvent();
                    Object source = event.getSource();
                    boolean dispatch = true;


                    if (event instanceof MouseEvent) {
                        MouseEvent e = (MouseEvent) event;

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