QEventDispatcherMac Class Reference

#include <qeventdispatcher_mac_p.h>

Inheritance diagram for QEventDispatcherMac:

Public Functions
void	flush ()
	Flushes the event queue. More...
bool	hasPendingEvents ()
	Returns true if there is an event waiting; otherwise returns false. More...
void	interrupt ()
	Interrupts event dispatching; i. More...
bool	processEvents (QEventLoop::ProcessEventsFlags flags)
	Processes pending events that match flags until there are no more events to process. More...
	QEventDispatcherMac (QObject *parent=0)
QList< TimerInfo >	registeredTimers (QObject *object) const
	Returns a list of registered timers for object. More...
void	registerSocketNotifier (QSocketNotifier *notifier)
	Registers notifier with the event loop. More...
void	registerTimer (int timerId, int interval, QObject *object)
	Register a timer with the specified timerId and interval for the given object. More...
void	unregisterSocketNotifier (QSocketNotifier *notifier)
	Unregisters notifier from the event dispatcher. More...
bool	unregisterTimer (int timerId)
	Unregisters the timer with the given timerId. More...
bool	unregisterTimers (QObject *object)
	Unregisters all the timers associated with the given object. More...
void	wakeUp ()
	Wakes up the event loop. More...
	~QEventDispatcherMac ()
Public Functions inherited from QAbstractEventDispatcher
virtual void	closingDown ()
bool	filterEvent (void *message)
	Sends message through the event filter that was set by setEventFilter(). More...
	QAbstractEventDispatcher (QObject *parent=0)
	Constructs a new event dispatcher with the given parent. More...
int	registerTimer (int interval, QObject *object)
	Registers a timer with the specified interval for the given object. More...
EventFilter	setEventFilter (EventFilter filter)
	Replaces the event filter function for this QAbstractEventDispatcher with filter and returns the replaced event filter function. More...
virtual void	startingUp ()
	~QAbstractEventDispatcher ()
	Destroys the event dispatcher. More...
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Friends
class	QApplicationPrivate
void	qt_mac_select_timer_callbk (__EventLoopTimer *, void *)

Additional Inherited Members
Public Types inherited from QAbstractEventDispatcher
typedef bool(*	EventFilter) (void *message)
	Typedef for a function with the signature. More...
typedef QPair< int, int >	TimerInfo
	Typedef for QPair<int, int>. More...
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QAbstractEventDispatcher
void	aboutToBlock ()
	This signal is emitted before the event loop calls a function that could block. More...
void	awake ()
	This signal is emitted after the event loop returns from a function that could block. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Functions inherited from QAbstractEventDispatcher
static QAbstractEventDispatcher *	instance (QThread *thread=0)
	Returns a pointer to the event dispatcher object for the specified thread. More...
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Functions inherited from QAbstractEventDispatcher
	QAbstractEventDispatcher (QAbstractEventDispatcherPrivate &, QObject *parent)
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 109 of file qeventdispatcher_mac_p.h.

Constructors and Destructors

QEventDispatcherMac()

QEventDispatcherMac::QEventDispatcherMac ( QObject *  parent = 0 )

explicit

Definition at line 982 of file qeventdispatcher_mac.mm.

    : QAbstractEventDispatcher(*new QEventDispatcherMacPrivate, parent)
{
    Q_D(QEventDispatcherMac);
    CFRunLoopSourceContext context;
    bzero(&context, sizeof(CFRunLoopSourceContext));
    context.info = d;
    context.equal = QEventDispatcherMacPrivate::postedEventSourceEqualCallback;
    context.perform = QEventDispatcherMacPrivate::postedEventsSourcePerformCallback;
    d->postedEventsSource = CFRunLoopSourceCreate(0, 0, &context);
    Q_ASSERT(d->postedEventsSource);
    CFRunLoopAddSource(mainRunLoop(), d->postedEventsSource, kCFRunLoopCommonModes);

    CFRunLoopObserverContext observerContext;
    bzero(&observerContext, sizeof(CFRunLoopObserverContext));
    observerContext.info = this;
    d->waitingObserver = CFRunLoopObserverCreate(kCFAllocatorDefault,
                                                 kCFRunLoopBeforeWaiting | kCFRunLoopAfterWaiting,
                                                 true, 0,
                                                 QEventDispatcherMacPrivate::waitingObserverCallback,
                                                 &observerContext);
    CFRunLoopAddObserver(mainRunLoop(), d->waitingObserver, kCFRunLoopCommonModes);

    /* The first cycle in the loop adds the source and the events of the source
       are not processed.
       We use an observer to process the posted events for the first
       execution of the loop. */
    CFRunLoopObserverContext firstTimeObserverContext;
    bzero(&firstTimeObserverContext, sizeof(CFRunLoopObserverContext));
    firstTimeObserverContext.info = d;
    d->firstTimeObserver = CFRunLoopObserverCreate(kCFAllocatorDefault,
                                                   kCFRunLoopEntry,
                                                   /* repeats = */ false,
                                                   0,
                                                   QEventDispatcherMacPrivate::firstLoopEntry,
                                                   &firstTimeObserverContext);
    CFRunLoopAddObserver(mainRunLoop(), d->firstTimeObserver, kCFRunLoopCommonModes);
}

~QEventDispatcherMac()

QEventDispatcherMac::~QEventDispatcherMac

(

)

Definition at line 1122 of file qeventdispatcher_mac.mm.

{
    Q_D(QEventDispatcherMac);
    //timer cleanup
    MacTimerHash::iterator it = QEventDispatcherMacPrivate::macTimerHash.begin();
    while (it != QEventDispatcherMacPrivate::macTimerHash.end()) {
        MacTimerInfo *t = it.value();
        if (t->runLoopTimer) {
            CFRunLoopTimerInvalidate(t->runLoopTimer);
            CFRelease(t->runLoopTimer);
        }
        delete t;
        ++it;
    }
    QEventDispatcherMacPrivate::macTimerHash.clear();

    // Remove CFSockets from the runloop.
    for (MacSocketHash::ConstIterator it = d->macSockets.constBegin(); it != d->macSockets.constEnd(); ++it) {
        MacSocketInfo *socketInfo = (*it);
        if (CFSocketIsValid(socketInfo->socket)) {
            qt_mac_remove_socket_from_runloop(socketInfo->socket, socketInfo->runloop);
            CFRunLoopSourceInvalidate(socketInfo->runloop);
            CFRelease(socketInfo->runloop);
            CFSocketInvalidate(socketInfo->socket);
            CFRelease(socketInfo->socket);
        }
    }
    CFRunLoopRemoveSource(mainRunLoop(), d->postedEventsSource, kCFRunLoopCommonModes);
    CFRelease(d->postedEventsSource);

    CFRunLoopObserverInvalidate(d->waitingObserver);
    CFRelease(d->waitingObserver);

    CFRunLoopObserverInvalidate(d->firstTimeObserver);
    CFRelease(d->firstTimeObserver);
}

Functions

flush()

void QEventDispatcherMac::flush ( )

virtual

Flushes the event queue.

This normally returns almost immediately. Does nothing on platforms other than X11.

Implements QAbstractEventDispatcher.

Definition at line 763 of file qeventdispatcher_mac.mm.

{
    if(qApp) {
        QWidgetList tlws = QApplication::topLevelWidgets();
        for(int i = 0; i < tlws.size(); i++) {
            QWidget *tlw = tlws.at(i);
            if(tlw->isVisible())
                macWindowFlush(qt_mac_window_for(tlw));
        }
    }
}

hasPendingEvents()

bool QEventDispatcherMac::hasPendingEvents ( )

virtual

Returns true if there is an event waiting; otherwise returns false.

Implements QAbstractEventDispatcher.

Definition at line 447 of file qeventdispatcher_mac.mm.

{
    extern uint qGlobalPostedEventsCount();
    return qGlobalPostedEventsCount() || (qt_is_gui_used && GetNumEventsInQueue(GetMainEventQueue()));
}

interrupt()

void QEventDispatcherMac::interrupt ( )

virtual

Interrupts event dispatching; i.

e. the event dispatcher will return from processEvents() as soon as possible.

Implements QAbstractEventDispatcher.

Definition at line 1102 of file qeventdispatcher_mac.mm.

{
    Q_D(QEventDispatcherMac);
    d->interrupt = true;
    wakeUp();

#ifndef QT_MAC_USE_COCOA
    CFRunLoopStop(mainRunLoop());
#else
    // We do nothing more here than setting d->interrupt = true, and
    // poke the event loop if it is sleeping. Actually stopping
    // NSApp, or the current modal session, is done inside the send
    // posted events callback. We do this to ensure that all current pending
    // cocoa events gets delivered before we stop. Otherwise, if we now stop
    // the last event loop recursion, cocoa will just drop pending posted
    // events on the floor before we get a chance to reestablish a new session.
    d->cancelWaitForMoreEvents();
#endif
}

processEvents()

bool QEventDispatcherMac::processEvents ( QEventLoop::ProcessEventsFlags  flags )

virtual

Processes pending events that match flags until there are no more events to process.

Returns true if an event was processed; otherwise returns false.

This function is especially useful if you have a long running operation and want to show its progress without allowing user input; i.e. by using the QEventLoop::ExcludeUserInputEvents flag.

If the QEventLoop::WaitForMoreEvents flag is set in flags, the behavior of this function is as follows:

• If events are available, this function returns after processing them.

• If no events are available, this function will wait until more are available and return after processing newly available events.

If the QEventLoop::WaitForMoreEvents flag is not set in flags, and no events are available, this function will return immediately.

Note: This function does not process events continuously; it returns after all available events are processed.

See also

hasPendingEvents()

Implements QAbstractEventDispatcher.

Definition at line 549 of file qeventdispatcher_mac.mm.

{
    Q_D(QEventDispatcherMac);
    d->interrupt = false;

#ifdef QT_MAC_USE_COCOA
    bool interruptLater = false;
    QtMacInterruptDispatcherHelp::cancelInterruptLater();
#endif

    // In case we end up recursing while we now process events, make sure
    // that we send remaining posted Qt events before this call returns:
    wakeUp();
    emit awake();

    bool excludeUserEvents = flags & QEventLoop::ExcludeUserInputEvents;
    bool retVal = false;
    forever {
        if (d->interrupt)
            break;

#ifdef QT_MAC_USE_COCOA
        QMacCocoaAutoReleasePool pool;
        NSEvent* event = 0;

        // First, send all previously excluded input events, if any:
        if (!excludeUserEvents) {
            while (!d->queuedUserInputEvents.isEmpty()) {
                event = static_cast<NSEvent *>(d->queuedUserInputEvents.takeFirst());
                if (!filterEvent(event)) {
                    qt_mac_send_event(flags, event, 0);
                    retVal = true;
                }
                [event release];
            }
        }

        // If Qt is used as a plugin, or as an extension in a native cocoa
        // application, we should not run or stop NSApplication; This will be
        // done from the application itself. And if processEvents is called
        // manually (rather than from a QEventLoop), we cannot enter a tight
        // loop and block this call, but instead we need to return after one flush.
        // Finally, if we are to exclude user input events, we cannot call [NSApp run]
        // as we then loose control over which events gets dispatched:
        const bool canExec_3rdParty = d->nsAppRunCalledByQt || ![NSApp isRunning];
        const bool canExec_Qt = !excludeUserEvents &&
                (flags & QEventLoop::DialogExec || flags & QEventLoop::EventLoopExec) ;

        if (canExec_Qt && canExec_3rdParty) {
            // We can use exec-mode, meaning that we can stay in a tight loop until
            // interrupted. This is mostly an optimization, but it allow us to use
            // [NSApp run], which is the normal code path for cocoa applications.
            if (NSModalSession session = d->currentModalSession()) {
                QBoolBlocker execGuard(d->currentExecIsNSAppRun, false);
                while ([NSApp runModalSession:session] == NSRunContinuesResponse && !d->interrupt)
                    qt_mac_waitForMoreModalSessionEvents();

                if (!d->interrupt && session == d->currentModalSessionCached) {
                    // Someone called [NSApp stopModal:] from outside the event
                    // dispatcher (e.g to stop a native dialog). But that call wrongly stopped
                    // 'session' as well. As a result, we need to restart all internal sessions:
                    d->temporarilyStopAllModalSessions();
                }
            } else {
                d->nsAppRunCalledByQt = true;
                QBoolBlocker execGuard(d->currentExecIsNSAppRun, true);
                [NSApp run];
            }
            retVal = true;
        } else {
            // We cannot block the thread (and run in a tight loop).
            // Instead we will process all current pending events and return.
            d->ensureNSAppInitialized();
            if (NSModalSession session = d->currentModalSession()) {
                // INVARIANT: a modal window is executing.
                if (!excludeUserEvents) {
                    // Since we can dispatch all kinds of events, we choose
                    // to use cocoa's native way of running modal sessions:
                    if (flags & QEventLoop::WaitForMoreEvents)
                        qt_mac_waitForMoreModalSessionEvents();
                    NSInteger status = [NSApp runModalSession:session];
                    if (status != NSRunContinuesResponse && session == d->currentModalSessionCached) {
                        // INVARIANT: Someone called [NSApp stopModal:] from outside the event
                        // dispatcher (e.g to stop a native dialog). But that call wrongly stopped
                        // 'session' as well. As a result, we need to restart all internal sessions:
                        d->temporarilyStopAllModalSessions();
                    }
                    retVal = true;
                } else do {
                    // Dispatch all non-user events (but que non-user events up for later). In
                    // this case, we need more control over which events gets dispatched, and
                    // cannot use [NSApp runModalSession:session]:
                    event = [NSApp nextEventMatchingMask:NSAnyEventMask
                    untilDate:nil
                    inMode:NSModalPanelRunLoopMode
                    dequeue: YES];

                    if (event) {
                        if (IsMouseOrKeyEvent(event)) {
                            [event retain];
                            d->queuedUserInputEvents.append(event);
                            continue;
                        }
                        if (!filterEvent(event) && qt_mac_send_event(flags, event, 0))
                            retVal = true;
                    }
                } while (!d->interrupt && event != nil);
            } else do {
                // INVARIANT: No modal window is executing.
                event = [NSApp nextEventMatchingMask:NSAnyEventMask
                untilDate:nil
                inMode:NSDefaultRunLoopMode
                dequeue: YES];

                if (event) {
                    if (flags & QEventLoop::ExcludeUserInputEvents) {
                        if (IsMouseOrKeyEvent(event)) {
                            [event retain];
                            d->queuedUserInputEvents.append(event);
                            continue;
                        }
                    }
                    if (!filterEvent(event) && qt_mac_send_event(flags, event, 0))
                        retVal = true;
                }
            } while (!d->interrupt && event != nil);

            // Be sure to flush the Qt posted events when not using exec mode
            // (exec mode will always do this call from the event loop source):
            if (!d->interrupt)
                QCoreApplicationPrivate::sendPostedEvents(0, 0, d->threadData);

            // Since the window that holds modality might have changed while processing
            // events, we we need to interrupt when we return back the previous process
            // event recursion to ensure that we spin the correct modal session.
            // We do the interruptLater at the end of the function to ensure that we don't
            // disturb the 'wait for more events' below (as deleteLater will post an event):
            interruptLater = true;
        }
#else
        do {
            EventRef event;
            if (!(flags & QEventLoop::ExcludeUserInputEvents)
                    && !d->queuedUserInputEvents.isEmpty()) {
                // process a pending user input event
                event = static_cast<EventRef>(d->queuedUserInputEvents.takeFirst());
            } else {
                OSStatus err = ReceiveNextEvent(0,0, kEventDurationNoWait, true, &event);
                if(err != noErr)
                    continue;
                // else
                if (flags & QEventLoop::ExcludeUserInputEvents) {
                    UInt32 ekind = GetEventKind(event),
                           eclass = GetEventClass(event);
                    switch(eclass) {
                        case kEventClassQt:
                            if(ekind != kEventQtRequestContext)
                                break;
                            // fall through
                        case kEventClassMouse:
                        case kEventClassKeyboard:
                            d->queuedUserInputEvents.append(event);
                            continue;
                    }
                }
            }

            if (!filterEvent(&event) && qt_mac_send_event(flags, event, 0))
                retVal = true;
            ReleaseEvent(event);
        } while(!d->interrupt && GetNumEventsInQueue(GetMainEventQueue()) > 0);

#endif

        bool canWait = (d->threadData->canWait
                && !retVal
                && !d->interrupt
                && (flags & QEventLoop::WaitForMoreEvents));
        if (canWait) {
            // INVARIANT: We haven't processed any events yet. And we're told
            // to stay inside this function until at least one event is processed.
            qt_mac_waitForMoreEvents();
            flags &= ~QEventLoop::WaitForMoreEvents;
        } else {
            // Done with event processing for now.
            // Leave the function:
            break;
        }
    }

    // If we're interrupted, we need to interrupt the _current_
    // recursion as well to check if it is  still supposed to be
    // executing. This way we wind down the stack until we land
    // on a recursion that again calls processEvents (typically
    // from QEventLoop), and set interrupt to false:
    if (d->interrupt)
        interrupt();

#ifdef QT_MAC_USE_COCOA
    if (interruptLater)
        QtMacInterruptDispatcherHelp::interruptLater();
#endif

    return retVal;
}

registeredTimers()

QList< QEventDispatcherMac::TimerInfo > QEventDispatcherMac::registeredTimers ( QObject *  object ) const

virtual

Returns a list of registered timers for object.

The timer ID is the first member in each pair; the interval is the second.

Implements QAbstractEventDispatcher.

Definition at line 243 of file qeventdispatcher_mac.mm.

{
    if (!object) {
        qWarning("QEventDispatcherMac:registeredTimers: invalid argument");
        return QList<TimerInfo>();
    }

    QList<TimerInfo> list;

    MacTimerHash::const_iterator it = QEventDispatcherMacPrivate::macTimerHash.constBegin();
    while (it != QEventDispatcherMacPrivate::macTimerHash.constEnd()) {
        MacTimerInfo *t = it.value();
        if (t->obj == object)
            list << TimerInfo(t->id, t->interval);
        ++it;
    }
    return list;
}

registerSocketNotifier()

void QEventDispatcherMac::registerSocketNotifier ( QSocketNotifier *  notifier )

virtual

Registers notifier with the event loop.

Subclasses must implement this method to tie a socket notifier into another event loop.

Implements QAbstractEventDispatcher.

Definition at line 319 of file qeventdispatcher_mac.mm.

{
    Q_ASSERT(notifier);
    int nativeSocket = notifier->socket();
    int type = notifier->type();
#ifndef QT_NO_DEBUG
    if (nativeSocket < 0 || nativeSocket > FD_SETSIZE) {
        qWarning("QSocketNotifier: Internal error");
        return;
    } else if (notifier->thread() != thread()
               || thread() != QThread::currentThread()) {
        qWarning("QSocketNotifier: socket notifiers cannot be enabled from another thread");
        return;
    }
#endif

    Q_D(QEventDispatcherMac);

    if (type == QSocketNotifier::Exception) {
        qWarning("QSocketNotifier::Exception is not supported on Mac OS X");
        return;
    }

    // Check if we have a CFSocket for the native socket, create one if not.
    MacSocketInfo *socketInfo = d->macSockets.value(nativeSocket);
    if (!socketInfo) {
        socketInfo = new MacSocketInfo();

        // Create CFSocket, specify that we want both read and write callbacks (the callbacks
        // are enabled/disabled later on).
        const int callbackTypes = kCFSocketReadCallBack | kCFSocketWriteCallBack;
        CFSocketContext context = {0, d, 0, 0, 0};
        socketInfo->socket = CFSocketCreateWithNative(kCFAllocatorDefault, nativeSocket, callbackTypes, qt_mac_socket_callback, &context);
        if (CFSocketIsValid(socketInfo->socket) == false) {
            qWarning("QEventDispatcherMac::registerSocketNotifier: Failed to create CFSocket");
            return;
        }

        CFOptionFlags flags = CFSocketGetSocketFlags(socketInfo->socket);
        flags |= kCFSocketAutomaticallyReenableWriteCallBack; //QSocketNotifier stays enabled after a write
        flags &= ~kCFSocketCloseOnInvalidate; //QSocketNotifier doesn't close the socket upon destruction/invalidation
        CFSocketSetSocketFlags(socketInfo->socket, flags);

        // Add CFSocket to runloop.
        if(!(socketInfo->runloop = qt_mac_add_socket_to_runloop(socketInfo->socket))) {
            qWarning("QEventDispatcherMac::registerSocketNotifier: Failed to add CFSocket to runloop");
            CFSocketInvalidate(socketInfo->socket);
            CFRelease(socketInfo->socket);
            return;
        }

        // Disable both callback types by default. This must be done after
        // we add the CFSocket to the runloop, or else these calls will have
        // no effect.
        CFSocketDisableCallBacks(socketInfo->socket, kCFSocketReadCallBack);
        CFSocketDisableCallBacks(socketInfo->socket, kCFSocketWriteCallBack);

        d->macSockets.insert(nativeSocket, socketInfo);
    }

    // Increment read/write counters and select enable callbacks if necessary.
    if (type == QSocketNotifier::Read) {
        Q_ASSERT(socketInfo->readNotifier == 0);
        socketInfo->readNotifier = notifier;
        CFSocketEnableCallBacks(socketInfo->socket, kCFSocketReadCallBack);
    } else if (type == QSocketNotifier::Write) {
        Q_ASSERT(socketInfo->writeNotifier == 0);
        socketInfo->writeNotifier = notifier;
        CFSocketEnableCallBacks(socketInfo->socket, kCFSocketWriteCallBack);
    }
}

registerTimer()

void QEventDispatcherMac::registerTimer ( int  timerId, int  interval, QObject *  object  )

virtual

Register a timer with the specified timerId and interval for the given object.

Implements QAbstractEventDispatcher.

Definition at line 154 of file qeventdispatcher_mac.mm.

{
#ifndef QT_NO_DEBUG
    if (timerId < 1 || interval < 0 || !obj) {
        qWarning("QEventDispatcherMac::registerTimer: invalid arguments");
        return;
    } else if (obj->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QObject::startTimer: timers cannot be started from another thread");
        return;
    }
#endif

    MacTimerInfo *t = new MacTimerInfo();
    t->id = timerId;
    t->interval = interval;
    t->obj = obj;
    t->runLoopTimer = 0;
    t->pending = false;

    CFAbsoluteTime fireDate = CFAbsoluteTimeGetCurrent();
    CFTimeInterval cfinterval = qMax(CFTimeInterval(interval) / 1000, 0.0000001);
    fireDate += cfinterval;
    QEventDispatcherMacPrivate::macTimerHash.insert(timerId, t);
    CFRunLoopTimerContext info = { 0, (void *)timerId, 0, 0, 0 };
    t->runLoopTimer = CFRunLoopTimerCreate(0, fireDate, cfinterval, 0, 0,
                                           QEventDispatcherMacPrivate::activateTimer, &info);
    if (t->runLoopTimer == 0) {
        qFatal("QEventDispatcherMac::registerTimer: Cannot create timer");
    }
    CFRunLoopAddTimer(mainRunLoop(), t->runLoopTimer, kCFRunLoopCommonModes);
}

unregisterSocketNotifier()

void QEventDispatcherMac::unregisterSocketNotifier ( QSocketNotifier *  notifier )

virtual

Unregisters notifier from the event dispatcher.

Subclasses must reimplement this method to tie a socket notifier into another event loop. Reimplementations must call the base implementation.

Implements QAbstractEventDispatcher.

Definition at line 396 of file qeventdispatcher_mac.mm.

{
    Q_ASSERT(notifier);
    int nativeSocket = notifier->socket();
    int type = notifier->type();
#ifndef QT_NO_DEBUG
    if (nativeSocket < 0 || nativeSocket > FD_SETSIZE) {
        qWarning("QSocketNotifier: Internal error");
        return;
    } else if (notifier->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QSocketNotifier: socket notifiers cannot be disabled from another thread");
        return;
    }
#endif

    Q_D(QEventDispatcherMac);

    if (type == QSocketNotifier::Exception) {
        qWarning("QSocketNotifier::Exception is not supported on Mac OS X");
        return;
    }
    MacSocketInfo *socketInfo = d->macSockets.value(nativeSocket);
    if (!socketInfo) {
        qWarning("QEventDispatcherMac::unregisterSocketNotifier: Tried to unregister a not registered notifier");
        return;
    }

    // Decrement read/write counters and disable callbacks if necessary.
    if (type == QSocketNotifier::Read) {
        Q_ASSERT(notifier == socketInfo->readNotifier);
        socketInfo->readNotifier = 0;
        CFSocketDisableCallBacks(socketInfo->socket, kCFSocketReadCallBack);
    } else if (type == QSocketNotifier::Write) {
        Q_ASSERT(notifier == socketInfo->writeNotifier);
        socketInfo->writeNotifier = 0;
        CFSocketDisableCallBacks(socketInfo->socket, kCFSocketWriteCallBack);
    }

    // Remove CFSocket from runloop if this was the last QSocketNotifier.
    if (socketInfo->readNotifier == 0 && socketInfo->writeNotifier == 0) {
        if (CFSocketIsValid(socketInfo->socket))
            qt_mac_remove_socket_from_runloop(socketInfo->socket, socketInfo->runloop);
        CFRunLoopSourceInvalidate(socketInfo->runloop);
        CFRelease(socketInfo->runloop);
        CFSocketInvalidate(socketInfo->socket);
        CFRelease(socketInfo->socket);
        delete socketInfo;
        d->macSockets.remove(nativeSocket);
    }
}

unregisterTimer()

bool QEventDispatcherMac::unregisterTimer ( int  timerId )

virtual

Unregisters the timer with the given timerId.

Returns true if successful; otherwise returns false.

See also

registerTimer(), unregisterTimers()

Implements QAbstractEventDispatcher.

Definition at line 186 of file qeventdispatcher_mac.mm.

{
#ifndef QT_NO_DEBUG
    if (identifier < 1) {
        qWarning("QEventDispatcherMac::unregisterTimer: invalid argument");
        return false;
    } else if (thread() != QThread::currentThread()) {
        qWarning("QObject::killTimer: timers cannot be stopped from another thread");
        return false;
    }
#endif
    if (identifier <= 0)
        return false;                                // not init'd or invalid timer

    MacTimerInfo *timerInfo = QEventDispatcherMacPrivate::macTimerHash.take(identifier);
    if (timerInfo == 0)
        return false;

    if (!QObjectPrivate::get(timerInfo->obj)->inThreadChangeEvent)
        QAbstractEventDispatcherPrivate::releaseTimerId(identifier);
    CFRunLoopTimerInvalidate(timerInfo->runLoopTimer);
    CFRelease(timerInfo->runLoopTimer);
    delete timerInfo;

    return true;
}

unregisterTimers()

bool QEventDispatcherMac::unregisterTimers ( QObject *  object )

virtual

Unregisters all the timers associated with the given object.

Returns true if all timers were successful removed; otherwise returns false.

See also

unregisterTimer(), registeredTimers()

Implements QAbstractEventDispatcher.

Definition at line 213 of file qeventdispatcher_mac.mm.

{
#ifndef QT_NO_DEBUG
    if (!obj) {
        qWarning("QEventDispatcherMac::unregisterTimers: invalid argument");
        return false;
    } else if (obj->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QObject::killTimers: timers cannot be stopped from another thread");
        return false;
    }
#endif

    MacTimerHash::iterator it = QEventDispatcherMacPrivate::macTimerHash.begin();
    while (it != QEventDispatcherMacPrivate::macTimerHash.end()) {
        MacTimerInfo *timerInfo = it.value();
        if (timerInfo->obj != obj) {
            ++it;
        } else {
            if (!QObjectPrivate::get(timerInfo->obj)->inThreadChangeEvent)
                QAbstractEventDispatcherPrivate::releaseTimerId(timerInfo->id);
            CFRunLoopTimerInvalidate(timerInfo->runLoopTimer);
            CFRelease(timerInfo->runLoopTimer);
            delete timerInfo;
            it = QEventDispatcherMacPrivate::macTimerHash.erase(it);
        }
    }
    return true;
}

wakeUp()

void QEventDispatcherMac::wakeUp ( )

virtual

Wakes up the event loop.

Note

This class or function is threadsafe.

See also

awake()

Implements QAbstractEventDispatcher.

Definition at line 755 of file qeventdispatcher_mac.mm.

Referenced by interrupt().

{
    Q_D(QEventDispatcherMac);
    d->serialNumber.ref();
    CFRunLoopSourceSignal(d->postedEventsSource);
    CFRunLoopWakeUp(mainRunLoop());
}

Friends and Related Functions

QApplicationPrivate

friend class QApplicationPrivate

friend

Definition at line 135 of file qeventdispatcher_mac_p.h.

qt_mac_select_timer_callbk

void qt_mac_select_timer_callbk ( __EventLoopTimer *  , void *    )

friend

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The documentation for this class was generated from the following files:

• /src/gui/kernel/qeventdispatcher_mac_p.h
• /src/gui/kernel/qeventdispatcher_mac.mm