/** Is called when the applet wants to be resized. */
@Override
public void appletResize(int width, int height) {
currentAppletSize.width = width;
currentAppletSize.height = height;
final Dimension currentSize = new Dimension(currentAppletSize.width, currentAppletSize.height);
if (loader != null) {
AppContext appCtxt = loader.getAppContext();
if (appCtxt != null) appEvtQ = (java.awt.EventQueue) appCtxt.get(AppContext.EVENT_QUEUE_KEY);
}
final AppletPanel ap = this;
if (appEvtQ != null) {
appEvtQ.postEvent(
new InvocationEvent(
Toolkit.getDefaultToolkit(),
new Runnable() {
@Override
public void run() {
if (ap != null) {
ap.dispatchAppletEvent(APPLET_RESIZE, currentSize);
}
}
}));
}
}
/**
* This arranges for runnable to have its run method called in the dispatch thread of the
* EventQueue. This will happen after all pending events are processed.
*
* @since 1.2
*/
public static void invokeLater(Runnable runnable) {
EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();
InvocationEvent ie = new InvocationEvent(eq, runnable, null, false);
eq.postEvent(ie);
}
private void wakeupEDT() {
if (log.isLoggable(PlatformLogger.Level.FINEST)) {
log.finest("wakeupEDT(): EDT == " + dispatchThread);
}
EventQueue eq = dispatchThread.getEventQueue();
eq.postEvent(new PeerEvent(this, wakingRunnable, PeerEvent.PRIORITY_EVENT));
}
// Post the given event to the corresponding event queue for the given component.
void postEvent(@Nullable Component c, @Nonnull AWTEvent event) {
// Force an update of the input state, so that we're in synch internally. Otherwise we might
// post more events before
// this one gets processed and end up using stale values for those events.
inputState.update(event);
EventQueue eventQueue = eventQueueFor(c);
if (eventQueue != null) {
eventQueue.postEvent(event);
}
pause(settings.delayBetweenEvents());
}
/**
* Pass an event onto the AWT component.
*
* @see java.awt.Component#processEvent(java.awt.AWTEvent)
*/
protected final void processEvent(AWTEvent event) {
AppContext ac = SunToolkit.targetToAppContext(target);
if (ac == null) {
target.dispatchEvent(SwingToolkit.convertEvent(event, target));
} else {
EventQueue eq = (EventQueue) ac.get(AppContext.EVENT_QUEUE_KEY);
if (eq == null) {
target.dispatchEvent(SwingToolkit.convertEvent(event, target));
} else {
eq.postEvent(SwingToolkit.convertEvent(event, target));
}
}
}
/**
* Causes runnable to have its run method called in the dispatch thread of the EventQueue. This
* will happen after all pending events are processed. The call blocks until this has happened.
* This method will throw an Error if called from the event dispatcher thread.
*
* @exception InterruptedException If another thread has interrupted this thread.
* @exception InvocationTargetException If an exception is thrown when running runnable.
* @since 1.2
*/
public static void invokeAndWait(Runnable runnable)
throws InterruptedException, InvocationTargetException {
if (isDispatchThread()) throw new Error("Can't call invokeAndWait from event dispatch thread");
EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();
Object notifyObject = new Object();
InvocationEvent ie = new InvocationEvent(eq, runnable, notifyObject, true);
synchronized (notifyObject) {
eq.postEvent(ie);
notifyObject.wait();
}
Exception exception;
if ((exception = ie.getException()) != null) throw new InvocationTargetException(exception);
}
public void run() {
final EventQueue eq = (EventQueue) appContext.get(EVENT_QUEUE_KEY);
if (eq != null) {
eq.postEvent(AWTAutoShutdown.getShutdownEvent());
}
}
/**
* Actually performs the event posting. This is needed because the RI doesn't use the public
* postEvent() method when transferring events between event queues in push() and pop().
*
* @param evt the event to post
* @param priority the priority of the event
*/
private final void postEventImpl(AWTEvent evt, int priority) {
if (evt == null) throw new NullPointerException();
if (next != null) {
next.postEvent(evt);
return;
}
Object source = evt.getSource();
Queue q = queues[priority];
if (source instanceof Component) {
// For PaintEvents, ask the ComponentPeer to coalesce the event
// when the component is heavyweight.
Component comp = (Component) source;
ComponentPeer peer = comp.peer;
if (peer != null && evt instanceof PaintEvent && !(peer instanceof LightweightPeer))
peer.coalescePaintEvent((PaintEvent) evt);
// Check for any events already on the queue with the same source
// and ID.
AWTEvent previous = null;
for (AWTEvent qevt = q.queueHead; qevt != null; qevt = qevt.queueNext) {
Object src = qevt.getSource();
if (qevt.id == evt.id && src == comp) {
// If there are, call coalesceEvents on the source component
// to see if they can be combined.
Component srccmp = (Component) src;
AWTEvent coalescedEvt = srccmp.coalesceEvents(qevt, evt);
if (coalescedEvt != null) {
// Yes. Replace the existing event with the combined event.
if (qevt != coalescedEvt) {
if (previous != null) {
assert previous.queueNext == qevt;
previous.queueNext = coalescedEvt;
} else {
assert q.queueHead == qevt;
q.queueHead = coalescedEvt;
}
coalescedEvt.queueNext = qevt.queueNext;
if (q.queueTail == qevt) q.queueTail = coalescedEvt;
qevt.queueNext = null;
}
return;
}
}
previous = qevt;
}
}
if (q.queueHead == null) {
// We have an empty queue. Set this event both as head and as tail.
q.queueHead = evt;
q.queueTail = evt;
} else {
// Note: queueTail should not be null here.
q.queueTail.queueNext = evt;
q.queueTail = evt;
}
if (dispatchThread == null || !dispatchThread.isAlive()) {
dispatchThread = new EventDispatchThread(this);
dispatchThread.start();
}
notify();
}
private void expectEventQueueToPostEvent() {
eventQueue.postEvent(event);
expectLastCall().once();
}
/** @inheritDoc */
@Override
public boolean enter() {
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine(
"enter(): blockingEDT=" + keepBlockingEDT.get() + ", blockingCT=" + keepBlockingCT.get());
}
if (!keepBlockingEDT.compareAndSet(false, true)) {
log.fine("The secondary loop is already running, aborting");
return false;
}
final Runnable run =
new Runnable() {
public void run() {
log.fine("Starting a new event pump");
if (filter == null) {
dispatchThread.pumpEvents(condition);
} else {
dispatchThread.pumpEventsForFilter(condition, filter);
}
}
};
// We have two mechanisms for blocking: if we're on the
// dispatch thread, start a new event pump; if we're
// on any other thread, call wait() on the treelock
Thread currentThread = Thread.currentThread();
if (currentThread == dispatchThread) {
if (log.isLoggable(PlatformLogger.Level.FINEST)) {
log.finest("On dispatch thread: " + dispatchThread);
}
if (interval != 0) {
if (log.isLoggable(PlatformLogger.Level.FINEST)) {
log.finest("scheduling the timer for " + interval + " ms");
}
timer.schedule(
timerTask =
new TimerTask() {
@Override
public void run() {
if (keepBlockingEDT.compareAndSet(true, false)) {
wakeupEDT();
}
}
},
interval);
}
// Dispose SequencedEvent we are dispatching on the the current
// AppContext, to prevent us from hang - see 4531693 for details
SequencedEvent currentSE =
KeyboardFocusManager.getCurrentKeyboardFocusManager().getCurrentSequencedEvent();
if (currentSE != null) {
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine("Dispose current SequencedEvent: " + currentSE);
}
currentSE.dispose();
}
// In case the exit() method is called before starting
// new event pump it will post the waking event to EDT.
// The event will be handled after the the new event pump
// starts. Thus, the enter() method will not hang.
//
// Event pump should be privileged. See 6300270.
AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
run.run();
return null;
}
});
} else {
if (log.isLoggable(PlatformLogger.Level.FINEST)) {
log.finest("On non-dispatch thread: " + currentThread);
}
synchronized (getTreeLock()) {
if (filter != null) {
dispatchThread.addEventFilter(filter);
}
try {
EventQueue eq = dispatchThread.getEventQueue();
eq.postEvent(new PeerEvent(this, run, PeerEvent.PRIORITY_EVENT));
keepBlockingCT.set(true);
if (interval > 0) {
long currTime = System.currentTimeMillis();
while (keepBlockingCT.get()
&& ((extCondition != null) ? extCondition.evaluate() : true)
&& (currTime + interval > System.currentTimeMillis())) {
getTreeLock().wait(interval);
}
} else {
while (keepBlockingCT.get()
&& ((extCondition != null) ? extCondition.evaluate() : true)) {
getTreeLock().wait();
}
}
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine("waitDone " + keepBlockingEDT.get() + " " + keepBlockingCT.get());
}
} catch (InterruptedException e) {
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine("Exception caught while waiting: " + e);
}
} finally {
if (filter != null) {
dispatchThread.removeEventFilter(filter);
}
}
// If the waiting process has been stopped because of the
// time interval passed or an exception occurred, the state
// should be changed
keepBlockingEDT.set(false);
keepBlockingCT.set(false);
}
}
return true;
}