QEventDispatcherWin32 Class Reference

#include <qeventdispatcher_win_p.h>

Inheritance diagram for QEventDispatcherWin32:

Public Functions
void	activateEventNotifiers ()
void	closingDown ()
bool	event (QEvent *e)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
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 QT_ENSURE_STACK_ALIGNED_FOR_SSE	processEvents (QEventLoop::ProcessEventsFlags flags)
	Processes pending events that match flags until there are no more events to process. More...
	QEventDispatcherWin32 (QObject *parent=0)
QList< TimerInfo >	registeredTimers (QObject *object) const
	Returns a list of registered timers for object. More...
bool	registerEventNotifier (QWinEventNotifier *notifier)
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	startingUp ()
void	unregisterEventNotifier (QWinEventNotifier *notifier)
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...
	~QEventDispatcherWin32 ()
Public Functions inherited from QAbstractEventDispatcher
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...
	~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	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...

Private Functions
void	createInternalHwnd ()

Friends
class	QGuiEventDispatcherWin32
LRESULT QT_WIN_CALLBACK	qt_GetMessageHook (int, WPARAM, LPARAM)
LRESULT QT_WIN_CALLBACK	qt_internal_proc (HWND hwnd, UINT message, WPARAM wp, LPARAM lp)

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 67 of file qeventdispatcher_win_p.h.

Constructors and Destructors

QEventDispatcherWin32()

QEventDispatcherWin32::QEventDispatcherWin32 ( QObject *  parent = 0 )

explicit

Definition at line 712 of file qeventdispatcher_win.cpp.

Referenced by QGuiEventDispatcherWin32::processEvents().

    : QAbstractEventDispatcher(*new QEventDispatcherWin32Private, parent)
{
}

~QEventDispatcherWin32()

QEventDispatcherWin32::~QEventDispatcherWin32

(

)

Definition at line 717 of file qeventdispatcher_win.cpp.

{
}

Functions

activateEventNotifiers()

void QEventDispatcherWin32::activateEventNotifiers

(

)

Definition at line 1076 of file qeventdispatcher_win.cpp.

{
    Q_D(QEventDispatcherWin32);
    //### this could break if events are removed/added in the activation
    for (int i=0; i<d->winEventNotifierList.count(); i++) {
#if !defined(Q_OS_WINCE)
        if (WaitForSingleObjectEx(d->winEventNotifierList.at(i)->handle(), 0, TRUE) == WAIT_OBJECT_0)
            d->activateEventNotifier(d->winEventNotifierList.at(i));
#else
        if (WaitForSingleObject(d->winEventNotifierList.at(i)->handle(), 0) == WAIT_OBJECT_0)
            d->activateEventNotifier(d->winEventNotifierList.at(i));
#endif
    }
}

closingDown()

void QEventDispatcherWin32::closingDown ( )

virtual

Warning

This function is not part of the public interface.

Reimplemented from QAbstractEventDispatcher.

Definition at line 1114 of file qeventdispatcher_win.cpp.

{
    Q_D(QEventDispatcherWin32);

    // clean up any socketnotifiers
    while (!d->sn_read.isEmpty())
        unregisterSocketNotifier((*(d->sn_read.begin()))->obj);
    while (!d->sn_write.isEmpty())
        unregisterSocketNotifier((*(d->sn_write.begin()))->obj);
    while (!d->sn_except.isEmpty())
        unregisterSocketNotifier((*(d->sn_except.begin()))->obj);

    // clean up any timers
    for (int i = 0; i < d->timerVec.count(); ++i)
        d->unregisterTimer(d->timerVec.at(i), true);
    d->timerVec.clear();
    d->timerDict.clear();

#ifndef Q_OS_WINCE
    if (d->getMessageHook)
        UnhookWindowsHookEx(d->getMessageHook);
    d->getMessageHook = 0;
#endif
}

createInternalHwnd()

void QEventDispatcherWin32::createInternalHwnd ( )

private

Definition at line 680 of file qeventdispatcher_win.cpp.

Referenced by processEvents(), and QGuiEventDispatcherWin32::QGuiEventDispatcherWin32().

{
    Q_D(QEventDispatcherWin32);

    Q_ASSERT(!d->internalHwnd);
    if (d->internalHwnd)
        return;
    d->internalHwnd = qt_create_internal_window(this);

#ifndef Q_OS_WINCE
    // setup GetMessage hook needed to drive our posted events
    d->getMessageHook = SetWindowsHookEx(WH_GETMESSAGE, (HOOKPROC) qt_GetMessageHook, NULL, GetCurrentThreadId());
    if (!d->getMessageHook) {
        qFatal("Qt: INTERNALL ERROR: failed to install GetMessage hook");
    }
#endif

    // register all socket notifiers
    QList<int> sockets = (d->sn_read.keys().toSet()
                          + d->sn_write.keys().toSet()
                          + d->sn_except.keys().toSet()).toList();
    for (int i = 0; i < sockets.count(); ++i)
        d->doWsaAsyncSelect(sockets.at(i));

    // start all normal timers
    for (int i = 0; i < d->timerVec.count(); ++i)
        d->registerTimer(d->timerVec.at(i));

    // trigger a call to sendPostedEvents()
    wakeUp();
}

event()

bool QEventDispatcherWin32::event ( QEvent *  e )

virtual

This virtual function receives events to an object and should return true if the event e was recognized and processed.

The event() function can be reimplemented to customize the behavior of an object.

See also

installEventFilter(), timerEvent(), QApplication::sendEvent(), QApplication::postEvent(), QWidget::event()

Reimplemented from QObject.

Definition at line 1139 of file qeventdispatcher_win.cpp.

Referenced by QETWidget::translateGestureEvent().

{
    Q_D(QEventDispatcherWin32);
    if (e->type() == QEvent::ZeroTimerEvent) {
        QZeroTimerEvent *zte = static_cast<QZeroTimerEvent*>(e);
        WinTimerInfo *t = d->timerDict.value(zte->timerId());
        if (t) {
            t->inTimerEvent = true;

            QTimerEvent te(zte->timerId());
            QCoreApplication::sendEvent(t->obj, &te);

            t = d->timerDict.value(zte->timerId());
            if (t) {
                if (t->interval == 0 && t->inTimerEvent) {
                    // post the next zero timer event as long as the timer was not restarted
                    QCoreApplication::postEvent(this, new QZeroTimerEvent(zte->timerId()));
                }

                t->inTimerEvent = false;
            }
        }
        return true;
    } else if (e->type() == QEvent::Timer) {
        QTimerEvent *te = static_cast<QTimerEvent*>(e);
        d->sendTimerEvent(te->timerId());
    }
    return QAbstractEventDispatcher::event(e);
}

flush()

void QEventDispatcherWin32::flush ( )

virtual

Flushes the event queue.

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

Implements QAbstractEventDispatcher.

Definition at line 1108 of file qeventdispatcher_win.cpp.

{ }

hasPendingEvents()

bool QEventDispatcherWin32::hasPendingEvents ( )

virtual

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

Implements QAbstractEventDispatcher.

Definition at line 864 of file qeventdispatcher_win.cpp.

{
    MSG msg;
    return qGlobalPostedEventsCount() || PeekMessage(&msg, NULL, 0, 0, PM_NOREMOVE);
}

interrupt()

void QEventDispatcherWin32::interrupt ( )

virtual

Interrupts event dispatching; i.

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

Implements QAbstractEventDispatcher.

Definition at line 1101 of file qeventdispatcher_win.cpp.

{
    Q_D(QEventDispatcherWin32);
    d->interrupt = true;
    wakeUp();
}

processEvents()

bool QEventDispatcherWin32::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.

Reimplemented in QGuiEventDispatcherWin32.

Definition at line 721 of file qeventdispatcher_win.cpp.

Referenced by QGuiEventDispatcherWin32::processEvents().

{
    Q_D(QEventDispatcherWin32);

    if (!d->internalHwnd)
        createInternalHwnd();

    d->interrupt = false;
    emit awake();

    bool canWait;
    bool retVal = false;
    bool seenWM_QT_SENDPOSTEDEVENTS = false;
    bool needWM_QT_SENDPOSTEDEVENTS = false;
    do {
        DWORD waitRet = 0;
        HANDLE pHandles[MAXIMUM_WAIT_OBJECTS - 1];
        QVarLengthArray<MSG> processedTimers;
        while (!d->interrupt) {
            DWORD nCount = d->winEventNotifierList.count();
            Q_ASSERT(nCount < MAXIMUM_WAIT_OBJECTS - 1);

            MSG msg;
            bool haveMessage;

            if (!(flags & QEventLoop::ExcludeUserInputEvents) && !d->queuedUserInputEvents.isEmpty()) {
                // process queued user input events
                haveMessage = true;
                msg = d->queuedUserInputEvents.takeFirst();
            } else if(!(flags & QEventLoop::ExcludeSocketNotifiers) && !d->queuedSocketEvents.isEmpty()) {
                // process queued socket events
                haveMessage = true;
                msg = d->queuedSocketEvents.takeFirst();
            } else {
                haveMessage = PeekMessage(&msg, 0, 0, 0, PM_REMOVE);
                if (haveMessage && (flags & QEventLoop::ExcludeUserInputEvents)
                    && ((msg.message >= WM_KEYFIRST
                         && msg.message <= WM_KEYLAST)
                        || (msg.message >= WM_MOUSEFIRST
                            && msg.message <= WM_MOUSELAST)
                        || msg.message == WM_MOUSEWHEEL
                        || msg.message == WM_MOUSEHWHEEL
                        || msg.message == WM_TOUCH
#ifndef QT_NO_GESTURES
                        || msg.message == WM_GESTURE
                        || msg.message == WM_GESTURENOTIFY
#endif
                        || msg.message == WM_CLOSE)) {
                    // queue user input events for later processing
                    haveMessage = false;
                    d->queuedUserInputEvents.append(msg);
                }
                if (haveMessage && (flags & QEventLoop::ExcludeSocketNotifiers)
                    && (msg.message == WM_QT_SOCKETNOTIFIER && msg.hwnd == d->internalHwnd)) {
                    // queue socket events for later processing
                    haveMessage = false;
                    d->queuedSocketEvents.append(msg);
                }
            }
            if (!haveMessage) {
                // no message - check for signalled objects
                for (int i=0; i<(int)nCount; i++)
                    pHandles[i] = d->winEventNotifierList.at(i)->handle();
                waitRet = MsgWaitForMultipleObjectsEx(nCount, pHandles, 0, QS_ALLINPUT, MWMO_ALERTABLE);
                if ((haveMessage = (waitRet == WAIT_OBJECT_0 + nCount))) {
                    // a new message has arrived, process it
                    continue;
                }
            }
            if (haveMessage) {
#ifdef Q_OS_WINCE
                // WinCE doesn't support hooks at all, so we have to call this by hand :(
                (void) qt_GetMessageHook(0, PM_REMOVE, (LPARAM) &msg);
#endif

                if (d->internalHwnd == msg.hwnd && msg.message == WM_QT_SENDPOSTEDEVENTS) {
                    if (seenWM_QT_SENDPOSTEDEVENTS) {
                        // when calling processEvents() "manually", we only want to send posted
                        // events once
                        needWM_QT_SENDPOSTEDEVENTS = true;
                        continue;
                    }
                    seenWM_QT_SENDPOSTEDEVENTS = true;
                } else if (msg.message == WM_TIMER) {
                    // avoid live-lock by keeping track of the timers we've already sent
                    bool found = false;
                    for (int i = 0; !found && i < processedTimers.count(); ++i) {
                        const MSG processed = processedTimers.constData()[i];
                        found = (processed.wParam == msg.wParam && processed.hwnd == msg.hwnd && processed.lParam == msg.lParam);
                    }
                    if (found)
                        continue;
                    processedTimers.append(msg);
                } else if (msg.message == WM_QUIT) {
                    if (QCoreApplication::instance())
                        QCoreApplication::instance()->quit();
                    return false;
                }

                if (!filterEvent(&msg)) {
                    TranslateMessage(&msg);
                    DispatchMessage(&msg);
                }
            } else if (waitRet < WAIT_OBJECT_0 + nCount) {
                d->activateEventNotifier(d->winEventNotifierList.at(waitRet - WAIT_OBJECT_0));
            } else {
                // nothing todo so break
                break;
            }
            retVal = true;
        }

        // still nothing - wait for message or signalled objects
        canWait = (!retVal
                   && !d->interrupt
                   && (flags & QEventLoop::WaitForMoreEvents));
        if (canWait) {
            DWORD nCount = d->winEventNotifierList.count();
            Q_ASSERT(nCount < MAXIMUM_WAIT_OBJECTS - 1);
            for (int i=0; i<(int)nCount; i++)
                pHandles[i] = d->winEventNotifierList.at(i)->handle();

            emit aboutToBlock();
            waitRet = MsgWaitForMultipleObjectsEx(nCount, pHandles, INFINITE, QS_ALLINPUT, MWMO_ALERTABLE | MWMO_INPUTAVAILABLE);
            emit awake();
            if (waitRet < WAIT_OBJECT_0 + nCount) {
                d->activateEventNotifier(d->winEventNotifierList.at(waitRet - WAIT_OBJECT_0));
                retVal = true;
            }
        }
    } while (canWait);

    if (!seenWM_QT_SENDPOSTEDEVENTS && (flags & QEventLoop::EventLoopExec) == 0) {
        // when called "manually", always send posted events
        QCoreApplicationPrivate::sendPostedEvents(0, 0, d->threadData);
    }

    if (needWM_QT_SENDPOSTEDEVENTS)
        PostMessage(d->internalHwnd, WM_QT_SENDPOSTEDEVENTS, 0, 0);

    return retVal;
}

registeredTimers()

QList< QEventDispatcherWin32::TimerInfo > QEventDispatcherWin32::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 1019 of file qeventdispatcher_win.cpp.

{
    if (!object) {
        qWarning("QEventDispatcherWin32:registeredTimers: invalid argument");
        return QList<TimerInfo>();
    }

    Q_D(const QEventDispatcherWin32);
    QList<TimerInfo> list;
    for (int i = 0; i < d->timerVec.size(); ++i) {
        const WinTimerInfo *t = d->timerVec.at(i);
        if (t && t->obj == object)
            list << TimerInfo(t->timerId, t->interval);
    }
    return list;
}

registerEventNotifier()

bool QEventDispatcherWin32::registerEventNotifier

(

QWinEventNotifier *

notifier

)

Definition at line 1036 of file qeventdispatcher_win.cpp.

Referenced by QWinEventNotifier::QWinEventNotifier(), and QWinEventNotifier::setEnabled().

{
    if (!notifier) {
        qWarning("QWinEventNotifier: Internal error");
        return false;
    } else if (notifier->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QWinEventNotifier: event notifiers cannot be enabled from another thread");
        return false;
    }

    Q_D(QEventDispatcherWin32);

    if (d->winEventNotifierList.contains(notifier))
        return true;

    if (d->winEventNotifierList.count() >= MAXIMUM_WAIT_OBJECTS - 2) {
        qWarning("QWinEventNotifier: Cannot have more than %d enabled at one time", MAXIMUM_WAIT_OBJECTS - 2);
        return false;
    }
    d->winEventNotifierList.append(notifier);
    return true;
}

registerSocketNotifier()

void QEventDispatcherWin32::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 870 of file qeventdispatcher_win.cpp.

{
    Q_ASSERT(notifier);
    int sockfd = notifier->socket();
    int type = notifier->type();
#ifndef QT_NO_DEBUG
    if (sockfd < 0) {
        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(QEventDispatcherWin32);
    QSNDict *sn_vec[3] = { &d->sn_read, &d->sn_write, &d->sn_except };
    QSNDict *dict = sn_vec[type];

    if (QCoreApplication::closingDown()) // ### d->exitloop?
        return; // after sn_cleanup, don't reinitialize.

    if (dict->contains(sockfd)) {
        const char *t[] = { "Read", "Write", "Exception" };
    /* Variable "socket" below is a function pointer. */
        qWarning("QSocketNotifier: Multiple socket notifiers for "
                 "same socket %d and type %s", sockfd, t[type]);
    }

    QSockNot *sn = new QSockNot;
    sn->obj = notifier;
    sn->fd  = sockfd;
    dict->insert(sn->fd, sn);

    if (d->internalHwnd)
        d->doWsaAsyncSelect(sockfd);
}

registerTimer()

void QEventDispatcherWin32::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 937 of file qeventdispatcher_win.cpp.

{
    if (timerId < 1 || interval < 0 || !object) {
        qWarning("QEventDispatcherWin32::registerTimer: invalid arguments");
        return;
    } else if (object->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QObject::startTimer: timers cannot be started from another thread");
        return;
    }

    Q_D(QEventDispatcherWin32);

    register WinTimerInfo *t = new WinTimerInfo;
    t->dispatcher = this;
    t->timerId  = timerId;
    t->interval = interval;
    t->obj  = object;
    t->inTimerEvent = false;
    t->fastTimerId = 0;

    if (d->internalHwnd)
        d->registerTimer(t);

    d->timerVec.append(t);                      // store in timer vector
    d->timerDict.insert(t->timerId, t);          // store timers in dict
}

startingUp()

void QEventDispatcherWin32::startingUp ( )

virtual

Warning

This function is not part of the public interface.

Reimplemented from QAbstractEventDispatcher.

Definition at line 1111 of file qeventdispatcher_win.cpp.

{ }

unregisterEventNotifier()

void QEventDispatcherWin32::unregisterEventNotifier

(

QWinEventNotifier *

notifier

)

Definition at line 1059 of file qeventdispatcher_win.cpp.

Referenced by QWinEventNotifier::setEnabled().

{
    if (!notifier) {
        qWarning("QWinEventNotifier: Internal error");
        return;
    } else if (notifier->thread() != thread() || thread() != QThread::currentThread()) {
        qWarning("QWinEventNotifier: event notifiers cannot be disabled from another thread");
        return;
    }

    Q_D(QEventDispatcherWin32);

    int i = d->winEventNotifierList.indexOf(notifier);
    if (i != -1)
        d->winEventNotifierList.takeAt(i);
}

unregisterSocketNotifier()

void QEventDispatcherWin32::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 908 of file qeventdispatcher_win.cpp.

Referenced by closingDown().

{
    Q_ASSERT(notifier);
    int sockfd = notifier->socket();
    int type = notifier->type();
#ifndef QT_NO_DEBUG
    if (sockfd < 0) {
        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(QEventDispatcherWin32);
    QSNDict *sn_vec[3] = { &d->sn_read, &d->sn_write, &d->sn_except };
    QSNDict *dict = sn_vec[type];
    QSockNot *sn = dict->value(sockfd);
    if (!sn)
        return;

    dict->remove(sockfd);
    delete sn;

    if (d->internalHwnd)
        d->doWsaAsyncSelect(sockfd);
}

unregisterTimer()

bool QEventDispatcherWin32::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 964 of file qeventdispatcher_win.cpp.

{
    if (timerId < 1) {
        qWarning("QEventDispatcherWin32::unregisterTimer: invalid argument");
        return false;
    }
    QThread *currentThread = QThread::currentThread();
    if (thread() != currentThread) {
        qWarning("QObject::killTimer: timers cannot be stopped from another thread");
        return false;
    }

    Q_D(QEventDispatcherWin32);
    if (d->timerVec.isEmpty() || timerId <= 0)
        return false;

    WinTimerInfo *t = d->timerDict.value(timerId);
    if (!t)
        return false;

    d->timerDict.remove(t->timerId);
    d->timerVec.removeAll(t);
    d->unregisterTimer(t);
    return true;
}

unregisterTimers()

bool QEventDispatcherWin32::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 990 of file qeventdispatcher_win.cpp.

{
    if (!object) {
        qWarning("QEventDispatcherWin32::unregisterTimers: invalid argument");
        return false;
    }
    QThread *currentThread = QThread::currentThread();
    if (object->thread() != thread() || thread() != currentThread) {
        qWarning("QObject::killTimers: timers cannot be stopped from another thread");
        return false;
    }

    Q_D(QEventDispatcherWin32);
    if (d->timerVec.isEmpty())
        return false;
    register WinTimerInfo *t;
    for (int i=0; i<d->timerVec.size(); i++) {
        t = d->timerVec.at(i);
        if (t && t->obj == object) {                // object found
            d->timerDict.remove(t->timerId);
            d->timerVec.removeAt(i);
            d->unregisterTimer(t);
            --i;
        }
    }
    return true;
}

wakeUp()

void QEventDispatcherWin32::wakeUp ( )

virtual

Wakes up the event loop.

Note

This class or function is threadsafe.

See also

awake()

Implements QAbstractEventDispatcher.

Definition at line 1091 of file qeventdispatcher_win.cpp.

Referenced by interrupt().

{
    Q_D(QEventDispatcherWin32);
    d->serialNumber.ref();
    if (d->internalHwnd && d->wakeUps.testAndSetAcquire(0, 1)) {
        // post a WM_QT_SENDPOSTEDEVENTS to this thread if there isn't one already pending
        PostMessage(d->internalHwnd, WM_QT_SENDPOSTEDEVENTS, 0, 0);
    }
}

Friends and Related Functions

QGuiEventDispatcherWin32

friend class QGuiEventDispatcherWin32

friend

Definition at line 73 of file qeventdispatcher_win_p.h.

qt_GetMessageHook

LRESULT QT_WIN_CALLBACK qt_GetMessageHook ( int  code, WPARAM  wp, LPARAM  lp  )

friend

Definition at line 520 of file qeventdispatcher_win.cpp.

{
    if (wp == PM_REMOVE) {
        QEventDispatcherWin32 *q = qobject_cast<QEventDispatcherWin32 *>(QAbstractEventDispatcher::instance());
        Q_ASSERT(q != 0);
        if (q) {
            MSG *msg = (MSG *) lp;
            QEventDispatcherWin32Private *d = q->d_func();
            int localSerialNumber = d->serialNumber;
            static const UINT mask = inputTimerMask();
            if (HIWORD(GetQueueStatus(mask)) == 0) {
                // no more input or timer events in the message queue, we can allow posted events to be sent normally now
                if (d->sendPostedEventsWindowsTimerId != 0) {
                    // stop the timer to send posted events, since we now allow the WM_QT_SENDPOSTEDEVENTS message
                    KillTimer(d->internalHwnd, d->sendPostedEventsWindowsTimerId);
                    d->sendPostedEventsWindowsTimerId = 0;
                }
                (void) d->wakeUps.fetchAndStoreRelease(0);
                if (localSerialNumber != d->lastSerialNumber
                    // if this message IS the one that triggers sendPostedEvents(), no need to post it again
                    && (msg->hwnd != d->internalHwnd
                        || msg->message != WM_QT_SENDPOSTEDEVENTS)) {
                    PostMessage(d->internalHwnd, WM_QT_SENDPOSTEDEVENTS, 0, 0);
                }
            } else if (d->sendPostedEventsWindowsTimerId == 0
                       && localSerialNumber != d->lastSerialNumber) {
                // start a special timer to continue delivering posted events while
                // there are still input and timer messages in the message queue
                d->sendPostedEventsWindowsTimerId = SetTimer(d->internalHwnd,
                                                             SendPostedEventsWindowsTimerId,
                                                             0, // we specify zero, but Windows uses USER_TIMER_MINIMUM
                                                             NULL);
                // we don't check the return value of SetTimer()... if creating the timer failed, there's little
                // we can do. we just have to accept that posted events will be starved
            }
        }
    }
#ifdef Q_OS_WINCE
    Q_UNUSED(code);
    return 0;
#else
    return CallNextHookEx(0, code, wp, lp);
#endif
}

qt_internal_proc

LRESULT QT_WIN_CALLBACK qt_internal_proc ( HWND  hwnd, UINT  message, WPARAM  wp, LPARAM  lp  )

friend

Definition at line 430 of file qeventdispatcher_win.cpp.

{
    if (message == WM_NCCREATE)
        return true;

    MSG msg;
    msg.hwnd = hwnd;
    msg.message = message;
    msg.wParam = wp;
    msg.lParam = lp;
    QCoreApplication *app = QCoreApplication::instance();
    long result;
    if (!app) {
        if (message == WM_TIMER)
            KillTimer(hwnd, wp);
        return 0;
    } else if (app->filterEvent(&msg, &result)) {
        return result;
    }

#ifdef GWLP_USERDATA
    QEventDispatcherWin32 *q = (QEventDispatcherWin32 *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
#else
    QEventDispatcherWin32 *q = (QEventDispatcherWin32 *) GetWindowLong(hwnd, GWL_USERDATA);
#endif
    QEventDispatcherWin32Private *d = 0;
    if (q != 0)
        d = q->d_func();

    if (message == WM_QT_SOCKETNOTIFIER) {
        // socket notifier message
        int type = -1;
        switch (WSAGETSELECTEVENT(lp)) {
        case FD_READ:
        case FD_CLOSE:
        case FD_ACCEPT:
            type = 0;
            break;
        case FD_WRITE:
        case FD_CONNECT:
            type = 1;
            break;
        case FD_OOB:
            type = 2;
            break;
        }
        if (type >= 0) {
            Q_ASSERT(d != 0);
            QSNDict *sn_vec[3] = { &d->sn_read, &d->sn_write, &d->sn_except };
            QSNDict *dict = sn_vec[type];

            QSockNot *sn = dict ? dict->value(wp) : 0;
            if (sn) {
                QEvent event(QEvent::SockAct);
                QCoreApplication::sendEvent(sn->obj, &event);
            }
        }
        return 0;
    } else if (message == WM_QT_SENDPOSTEDEVENTS
               // we also use a Windows timer to send posted events when the message queue is full
               || (message == WM_TIMER
                   && d->sendPostedEventsWindowsTimerId != 0
                   && wp == (uint)d->sendPostedEventsWindowsTimerId)) {
        int localSerialNumber = d->serialNumber;
        if (localSerialNumber != d->lastSerialNumber) {
            d->lastSerialNumber = localSerialNumber;
            QCoreApplicationPrivate::sendPostedEvents(0, 0, d->threadData);
        }
        return 0;
    } else if (message == WM_TIMER) {
        Q_ASSERT(d != 0);
        d->sendTimerEvent(wp);
        return 0;
    }

    return DefWindowProc(hwnd, message, wp, lp);
}

---

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

• /src/corelib/kernel/qeventdispatcher_win_p.h
• /src/corelib/kernel/qeventdispatcher_win.cpp