FCL/sf/mw/qt: comparison src/corelib/kernel/qcoreapplication.cpp

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--1:000000000000
+:1918ee327afb
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qcoreapplication.h"
+#include "qcoreapplication_p.h"
+#include "qabstracteventdispatcher.h"
+#include "qcoreevent.h"
+#include "qeventloop.h"
+#include "qcorecmdlineargs_p.h"
+#include <qdatastream.h>
+#include <qdatetime.h>
+#include <qdebug.h>
+#include <qdir.h>
+#include <qfile.h>
+#include <qfileinfo.h>
+#include <qhash.h>
+#include <private/qprocess_p.h>
+#include <qtextcodec.h>
+#include <qthread.h>
+#include <qthreadpool.h>
+#include <qthreadstorage.h>
+#include <private/qthread_p.h>
+#include <qlibraryinfo.h>
+#include <qvarlengtharray.h>
+#include <private/qfactoryloader_p.h>
+#include <private/qfunctions_p.h>
+#ifdef Q_OS_SYMBIAN
+#  include <exception>
+#  include <f32file.h>
+#  include "qeventdispatcher_symbian_p.h"
+#  include "private/qcore_symbian_p.h"
+#elif defined(Q_OS_UNIX)
+#  if !defined(QT_NO_GLIB)
+#    include "qeventdispatcher_glib_p.h"
+#  endif
+#  include "qeventdispatcher_unix_p.h"
+#endif
+#ifdef Q_OS_WIN
+#  include "qeventdispatcher_win_p.h"
+#endif
+#ifdef Q_OS_MAC
+#  include "qcore_mac_p.h"
+#endif
+#include <stdlib.h>
+#ifdef Q_OS_UNIX
+#  include <locale.h>
+#endif
+#ifdef Q_OS_VXWORKS
+#  include <taskLib.h>
+#endif
+QT_BEGIN_NAMESPACE
+class QMutexUnlocker
+{
+public:
+inline explicit QMutexUnlocker(QMutex *m)
+: mtx(m)
+{ }
+inline ~QMutexUnlocker() { unlock(); }
+inline void unlock() { if (mtx) mtx->unlock(); mtx = 0; }
+private:
+Q_DISABLE_COPY(QMutexUnlocker)
+QMutex *mtx;
+};
+#ifdef Q_OS_SYMBIAN
+typedef TDriveNumber (*SystemDriveFunc)(RFs&);
+static SystemDriveFunc PtrGetSystemDrive=0;
+#endif
+#if defined(Q_WS_WIN) || defined(Q_WS_MAC)
+extern QString qAppFileName();
+#endif
+#if !defined(Q_OS_WIN)
+#ifdef Q_OS_MAC
+QString QCoreApplicationPrivate::macMenuBarName()
+{
+QString bundleName;
+CFTypeRef string = CFBundleGetValueForInfoDictionaryKey(CFBundleGetMainBundle(), CFSTR("CFBundleName"));
+if (string)
+bundleName = QCFString::toQString(static_cast<CFStringRef>(string));
+return bundleName;
+}
+#endif
+QString QCoreApplicationPrivate::appName() const
+{
+static QString applName;
+#ifdef Q_OS_MAC
+applName = macMenuBarName();
+#endif
+if (applName.isEmpty() && argv[0]) {
+char *p = strrchr(argv[0], '/');
+applName = QString::fromLocal8Bit(p ? p + 1 : argv[0]);
+}
+return applName;
+}
+#endif
+bool QCoreApplicationPrivate::checkInstance(const char *function)
+{
+bool b = (QCoreApplication::self != 0);
+if (!b)
+qWarning("QApplication::%s: Please instantiate the QApplication object first", function);
+return b;
+}
+// Support for introspection
+QSignalSpyCallbackSet Q_CORE_EXPORT qt_signal_spy_callback_set = { 0, 0, 0, 0 };
+void qt_register_signal_spy_callbacks(const QSignalSpyCallbackSet &callback_set)
+{
+qt_signal_spy_callback_set = callback_set;
+}
+extern "C" void Q_CORE_EXPORT qt_startup_hook()
+{
+}
+typedef QList<QtCleanUpFunction> QVFuncList;
+Q_GLOBAL_STATIC(QVFuncList, postRList)
+void qAddPostRoutine(QtCleanUpFunction p)
+{
+QVFuncList *list = postRList();
+if (!list)
+return;
+list->prepend(p);
+}
+void qRemovePostRoutine(QtCleanUpFunction p)
+{
+QVFuncList *list = postRList();
+if (!list)
+return;
+list->removeAll(p);
+}
+void Q_CORE_EXPORT qt_call_post_routines()
+{
+QVFuncList *list = 0;
+QT_TRY {
+list = postRList();
+} QT_CATCH(const std::bad_alloc &) {
+// ignore - if we can't allocate a post routine list,
+// there's a high probability that there's no post
+// routine to be executed :)
+}
+if (!list)
+return;
+while (!list->isEmpty())
+(list->takeFirst())();
+}
+// app starting up if false
+bool QCoreApplicationPrivate::is_app_running = false;
+// app closing down if true
+bool QCoreApplicationPrivate::is_app_closing = false;
+// initialized in qcoreapplication and in qtextstream autotest when setlocale is called.
+Q_CORE_EXPORT bool qt_locale_initialized = false;
+Q_CORE_EXPORT uint qGlobalPostedEventsCount()
+{
+QThreadData *currentThreadData = QThreadData::current();
+return currentThreadData->postEventList.size() - currentThreadData->postEventList.startOffset;
+}
+void qt_set_current_thread_to_main_thread()
+{
+QCoreApplicationPrivate::theMainThread = QThread::currentThread();
+}
+QCoreApplication *QCoreApplication::self = 0;
+QAbstractEventDispatcher *QCoreApplicationPrivate::eventDispatcher = 0;
+uint QCoreApplicationPrivate::attribs;
+#ifdef Q_OS_UNIX
+Qt::HANDLE qt_application_thread_id = 0;
+#endif
+struct QCoreApplicationData {
+QCoreApplicationData() {
+#ifndef QT_NO_LIBRARY
+app_libpaths = 0;
+#endif
+}
+~QCoreApplicationData() {
+#ifndef QT_NO_LIBRARY
+delete app_libpaths;
+#endif
+// cleanup the QAdoptedThread created for the main() thread
+if (QCoreApplicationPrivate::theMainThread) {
+QThreadData *data = QThreadData::get2(QCoreApplicationPrivate::theMainThread);
+QCoreApplicationPrivate::theMainThread = 0;
+data->deref(); // deletes the data and the adopted thread
+}
+}
+QString orgName, orgDomain, application;
+QString applicationVersion;
+#ifndef QT_NO_LIBRARY
+QStringList *app_libpaths;
+#endif
+};
+Q_GLOBAL_STATIC(QCoreApplicationData, coreappdata)
+QCoreApplicationPrivate::QCoreApplicationPrivate(int &aargc, char **aargv)
+: QObjectPrivate(), argc(aargc), argv(aargv), application_type(0), eventFilter(0),
+in_exec(false), aboutToQuitEmitted(false)
+{
+static const char *const empty = "";
+if (argc == 0 || argv == 0) {
+argc = 0;
+argv = (char **)&empty; // ouch! careful with QCoreApplication::argv()!
+}
+QCoreApplicationPrivate::is_app_closing = false;
+#ifdef Q_OS_UNIX
+qt_application_thread_id = QThread::currentThreadId();
+#endif
+// note: this call to QThread::currentThread() may end up setting theMainThread!
+if (QThread::currentThread() != theMainThread)
+qWarning("WARNING: QApplication was not created in the main() thread.");
+}
+QCoreApplicationPrivate::~QCoreApplicationPrivate()
+{
+if (threadData) {
+#ifndef QT_NO_THREAD
+void *data = &threadData->tls;
+QThreadStorageData::finish((void **)data);
+#endif
+// need to clear the state of the mainData, just in case a new QCoreApplication comes along.
+QMutexLocker locker(&threadData->postEventList.mutex);
+for (int i = 0; i < threadData->postEventList.size(); ++i) {
+const QPostEvent &pe = threadData->postEventList.at(i);
+if (pe.event) {
+--pe.receiver->d_func()->postedEvents;
+pe.event->posted = false;
+delete pe.event;
+}
+}
+threadData->postEventList.clear();
+threadData->postEventList.recursion = 0;
+threadData->quitNow = false;
+}
+}
+void QCoreApplicationPrivate::createEventDispatcher()
+{
+Q_Q(QCoreApplication);
+#if defined(Q_OS_SYMBIAN)
+eventDispatcher = new QEventDispatcherSymbian(q);
+#elif defined(Q_OS_UNIX)
+#  if !defined(QT_NO_GLIB)
+if (qgetenv("QT_NO_GLIB").isEmpty() && QEventDispatcherGlib::versionSupported())
+eventDispatcher = new QEventDispatcherGlib(q);
+else
+#  endif
+eventDispatcher = new QEventDispatcherUNIX(q);
+#elif defined(Q_OS_WIN)
+eventDispatcher = new QEventDispatcherWin32(q);
+#else
+#  error "QEventDispatcher not yet ported to this platform"
+#endif
+}
+QThread *QCoreApplicationPrivate::theMainThread = 0;
+QThread *QCoreApplicationPrivate::mainThread()
+{
+Q_ASSERT(theMainThread != 0);
+return theMainThread;
+}
+#if !defined (QT_NO_DEBUG) || defined (QT_MAC_FRAMEWORK_BUILD)
+void QCoreApplicationPrivate::checkReceiverThread(QObject *receiver)
+{
+QThread *currentThread = QThread::currentThread();
+QThread *thr = receiver->thread();
+Q_ASSERT_X(currentThread == thr || !thr,
+"QCoreApplication::sendEvent",
+QString::fromLatin1("Cannot send events to objects owned by a different thread. "
+"Current thread %1. Receiver '%2' (of type '%3') was created in thread %4")
+.arg(QString::number((quintptr) currentThread, 16))
+.arg(receiver->objectName())
+.arg(QLatin1String(receiver->metaObject()->className()))
+.arg(QString::number((quintptr) thr, 16))
+.toLocal8Bit().data());
+Q_UNUSED(currentThread);
+Q_UNUSED(thr);
+}
+#elif defined(Q_OS_SYMBIAN) && defined (QT_NO_DEBUG)
+// no implementation in release builds, but keep the symbol present
+void QCoreApplicationPrivate::checkReceiverThread(QObject * /* receiver */)
+{
+}
+#endif
+void QCoreApplicationPrivate::appendApplicationPathToLibraryPaths()
+{
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+QStringList *app_libpaths = coreappdata()->app_libpaths;
+Q_ASSERT(app_libpaths);
+# if defined(Q_OS_SYMBIAN)
+QString app_location( QCoreApplication::applicationDirPath() );
+// File existence check for application's private dir requires additional '\' or
+// platform security will not allow it.
+if (app_location !=  QLibraryInfo::location(QLibraryInfo::PluginsPath) && QFile::exists(app_location + QLatin1Char('\\')) && !app_libpaths->contains(app_location))
+# else
+QString app_location( QCoreApplication::applicationFilePath() );
+app_location.truncate(app_location.lastIndexOf(QLatin1Char('/')));
+app_location = QDir(app_location).canonicalPath();
+if (QFile::exists(app_location) && !app_libpaths->contains(app_location))
+# endif
+app_libpaths->append(app_location);
+#endif
+}
+QString qAppName()
+{
+if (!QCoreApplicationPrivate::checkInstance("qAppName"))
+return QString();
+return QCoreApplication::instance()->d_func()->appName();
+}
+/*!
+\class QCoreApplication
+\brief The QCoreApplication class provides an event loop for console Qt
+applications.
+This class is used by non-GUI applications to provide their event
+loop. For non-GUI application that uses Qt, there should be exactly
+one QCoreApplication object. For GUI applications, see
+QApplication.
+QCoreApplication contains the main event loop, where all events
+from the operating system (e.g., timer and network events) and
+other sources are processed and dispatched. It also handles the
+application's initialization and finalization, as well as
+system-wide and application-wide settings.
+\section1 The Event Loop and Event Handling
+The event loop is started with a call to exec(). Long running
+operations can call processEvents() to keep the application
+responsive.
+Some Qt classes, such as QString, can be used without a
+QCoreApplication object. However, in general, we recommend that
+you create a QCoreApplication or a QApplication object in your \c
+main() function as early as possible. exit() will not return
+until the event loop exits; e.g., when quit() is called.
+Several static convenience functions are also provided. The
+QCoreApplication object is available from instance(). Events can
+be sent or posted using sendEvent(), postEvent(), and
+sendPostedEvents(). Pending events can be removed with
+removePostedEvents() or flushed with flush().
+The class provides a quit() slot and an aboutToQuit() signal.
+\section1 Application and Library Paths
+An application has an applicationDirPath() and an
+applicationFilePath(). Library paths (see QLibrary) can be retrieved
+with libraryPaths() and manipulated by setLibraryPaths(), addLibraryPath(),
+and removeLibraryPath().
+\section1 Internationalization and Translations
+Translation files can be added or removed
+using installTranslator() and removeTranslator(). Application
+strings can be translated using translate(). The QObject::tr()
+and QObject::trUtf8() functions are implemented in terms of
+translate().
+\section1 Accessing Command Line Arguments
+The command line arguments which are passed to QCoreApplication's
+constructor should be accessed using the arguments() function.
+Note that some arguments supplied by the user may have been
+processed and removed by QCoreApplication.
+In cases where command line arguments need to be obtained using the
+argv() function, you must convert them from the local string encoding
+using QString::fromLocal8Bit().
+\section1 Locale Settings
+On Unix/Linux Qt is configured to use the system locale settings by
+default. This can cause a conflict when using POSIX functions, for
+instance, when converting between data types such as floats and
+strings, since the notation may differ between locales. To get
+around this problem, call the POSIX function \c{setlocale(LC_NUMERIC,"C")}
+right after initializing QApplication or QCoreApplication to reset
+the locale that is used for number formatting to "C"-locale.
+\sa QApplication, QAbstractEventDispatcher, QEventLoop,
+{Semaphores Example}, {Wait Conditions Example}
+*/
+/*!
+\fn static QCoreApplication *QCoreApplication::instance()
+Returns a pointer to the application's QCoreApplication (or
+QApplication) instance.
+If no instance has been allocated, \c null is returned.
+*/
+/*!\internal
+*/
+QCoreApplication::QCoreApplication(QCoreApplicationPrivate &p)
+: QObject(p, 0)
+{
+init();
+// note: it is the subclasses' job to call
+// QCoreApplicationPrivate::eventDispatcher->startingUp();
+}
+/*!
+Flushes the platform specific event queues.
+If you are doing graphical changes inside a loop that does not
+return to the event loop on asynchronous window systems like X11
+or double buffered window systems like Mac OS X, and you want to
+visualize these changes immediately (e.g. Splash Screens), call
+this function.
+\sa sendPostedEvents()
+*/
+void QCoreApplication::flush()
+{
+if (self && self->d_func()->eventDispatcher)
+self->d_func()->eventDispatcher->flush();
+}
+/*!
+Constructs a Qt kernel application. Kernel applications are
+applications without a graphical user interface. These type of
+applications are used at the console or as server processes.
+The \a argc and \a argv arguments are processed by the application,
+and made available in a more convenient form by the arguments()
+function.
+\warning The data referred to by \a argc and \a argv must stay valid
+for the entire lifetime of the QCoreApplication object. In addition,
+\a argc must be greater than zero and \a argv must contain at least
+one valid character string.
+*/
+QCoreApplication::QCoreApplication(int &argc, char **argv)
+: QObject(*new QCoreApplicationPrivate(argc, argv))
+{
+init();
+QCoreApplicationPrivate::eventDispatcher->startingUp();
+#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+// Refresh factoryloader, as text codecs are requested during lib path
+// resolving process and won't be therefore properly loaded.
+// Unknown if this is symbian specific issue.
+QFactoryLoader::refreshAll();
+#endif
+}
+extern void set_winapp_name();
+// ### move to QCoreApplicationPrivate constructor?
+void QCoreApplication::init()
+{
+Q_D(QCoreApplication);
+#ifdef Q_OS_UNIX
+setlocale(LC_ALL, "");                // use correct char set mapping
+qt_locale_initialized = true;
+#endif
+#ifdef Q_WS_WIN
+// Get the application name/instance if qWinMain() was not invoked
+set_winapp_name();
+#endif
+Q_ASSERT_X(!self, "QCoreApplication", "there should be only one application object");
+QCoreApplication::self = this;
+#ifndef QT_NO_THREAD
+QThread::initialize();
+#endif
+// use the event dispatcher created by the app programmer (if any)
+if (!QCoreApplicationPrivate::eventDispatcher)
+QCoreApplicationPrivate::eventDispatcher = d->threadData->eventDispatcher;
+// otherwise we create one
+if (!QCoreApplicationPrivate::eventDispatcher)
+d->createEventDispatcher();
+Q_ASSERT(QCoreApplicationPrivate::eventDispatcher != 0);
+if (!QCoreApplicationPrivate::eventDispatcher->parent())
+QCoreApplicationPrivate::eventDispatcher->moveToThread(d->threadData->thread);
+d->threadData->eventDispatcher = QCoreApplicationPrivate::eventDispatcher;
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+if (!coreappdata()->app_libpaths) {
+// make sure that library paths is initialized
+libraryPaths();
+} else {
+d->appendApplicationPathToLibraryPaths();
+}
+#endif
+#if defined(Q_OS_UNIX) && !(defined(QT_NO_PROCESS))
+// Make sure the process manager thread object is created in the main
+// thread.
+QProcessPrivate::initializeProcessManager();
+#endif
+#ifdef QT_EVAL
+extern void qt_core_eval_init(uint);
+qt_core_eval_init(d->application_type);
+#endif
+qt_startup_hook();
+}
+/*!
+Destroys the QCoreApplication object.
+*/
+QCoreApplication::~QCoreApplication()
+{
+qt_call_post_routines();
+self = 0;
+QCoreApplicationPrivate::is_app_closing = true;
+QCoreApplicationPrivate::is_app_running = false;
+#if !defined(QT_NO_THREAD)
+#if !defined(QT_NO_CONCURRENT)
+// Synchronize and stop the global thread pool threads.
+QThreadPool *globalThreadPool = 0;
+QT_TRY {
+globalThreadPool = QThreadPool::globalInstance();
+} QT_CATCH (...) {
+// swallow the exception, since destructors shouldn't throw
+}
+if (globalThreadPool)
+globalThreadPool->waitForDone();
+#endif
+QThread::cleanup();
+#endif
+d_func()->threadData->eventDispatcher = 0;
+if (QCoreApplicationPrivate::eventDispatcher)
+QCoreApplicationPrivate::eventDispatcher->closingDown();
+QCoreApplicationPrivate::eventDispatcher = 0;
+#ifndef QT_NO_LIBRARY
+delete coreappdata()->app_libpaths;
+coreappdata()->app_libpaths = 0;
+#endif
+}
+/*!
+Sets the attribute \a attribute if \a on is true;
+otherwise clears the attribute.
+One of the attributes that can be set with this method is
+Qt::AA_ImmediateWidgetCreation. It tells Qt to create toplevel
+windows immediately. Normally, resources for widgets are allocated
+on demand to improve efficiency and minimize resource usage.
+Therefore, if it is important to minimize resource consumption, do
+not set this attribute.
+\sa testAttribute()
+*/
+void QCoreApplication::setAttribute(Qt::ApplicationAttribute attribute, bool on)
+{
+if (on)
+QCoreApplicationPrivate::attribs |= 1 << attribute;
+else
+QCoreApplicationPrivate::attribs &= ~(1 << attribute);
+#ifdef Q_OS_MAC
+// Turn on the no native menubar here, since we used to
+// do this implicitly. We DO NOT flip it off if someone sets
+// it to false.
+// Ideally, we'd have magic that would be something along the lines of
+// "follow MacPluginApplication" unless explicitly set.
+// Considering this attribute isn't only at the beginning
+// it's unlikely it will ever be a problem, but I want
+// to have the behavior documented here.
+if (attribute == Qt::AA_MacPluginApplication && on
+&& !testAttribute(Qt::AA_DontUseNativeMenuBar)) {
+setAttribute(Qt::AA_DontUseNativeMenuBar, true);
+}
+#endif
+}
+/*!
+Returns true if attribute \a attribute is set;
+otherwise returns false.
+\sa setAttribute()
+*/
+bool QCoreApplication::testAttribute(Qt::ApplicationAttribute attribute)
+{
+return QCoreApplicationPrivate::testAttribute(attribute);
+}
+/*!
+\internal
+This function is here to make it possible for Qt extensions to
+hook into event notification without subclassing QApplication
+*/
+bool QCoreApplication::notifyInternal(QObject *receiver, QEvent *event)
+{
+// Make it possible for Qt Jambi and QSA to hook into events even
+// though QApplication is subclassed...
+bool result = false;
+void *cbdata[] = { receiver, event, &result };
+if (QInternal::activateCallbacks(QInternal::EventNotifyCallback, cbdata)) {
+return result;
+}
+// Qt enforces the rule that events can only be sent to objects in
+// the current thread, so receiver->d_func()->threadData is
+// equivalent to QThreadData::current(), just without the function
+// call overhead.
+QObjectPrivate *d = receiver->d_func();
+QThreadData *threadData = d->threadData;
+++threadData->loopLevel;
+#ifdef QT_JAMBI_BUILD
+int deleteWatch = 0;
+int *oldDeleteWatch = QObjectPrivate::setDeleteWatch(d, &deleteWatch);
+bool inEvent = d->inEventHandler;
+d->inEventHandler = true;
+#endif
+bool returnValue;
+QT_TRY {
+returnValue = notify(receiver, event);
+} QT_CATCH (...) {
+--threadData->loopLevel;
+QT_RETHROW;
+}
+#ifdef QT_JAMBI_BUILD
+// Restore the previous state if the object was not deleted..
+if (!deleteWatch) {
+d->inEventHandler = inEvent;
+}
+QObjectPrivate::resetDeleteWatch(d, oldDeleteWatch, deleteWatch);
+#endif
+--threadData->loopLevel;
+return returnValue;
+}
+/*!
+Sends \a event to \a receiver: \a {receiver}->event(\a event).
+Returns the value that is returned from the receiver's event
+handler. Note that this function is called for all events sent to
+any object in any thread.
+For certain types of events (e.g. mouse and key events),
+the event will be propagated to the receiver's parent and so on up to
+the top-level object if the receiver is not interested in the event
+(i.e., it returns false).
+There are five different ways that events can be processed;
+reimplementing this virtual function is just one of them. All five
+approaches are listed below:
+\list 1
+\i Reimplementing paintEvent(), mousePressEvent() and so
+on. This is the commonest, easiest and least powerful way.
+\i Reimplementing this function. This is very powerful, providing
+complete control; but only one subclass can be active at a time.
+\i Installing an event filter on QCoreApplication::instance(). Such
+an event filter is able to process all events for all widgets, so
+it's just as powerful as reimplementing notify(); furthermore, it's
+possible to have more than one application-global event filter.
+Global event filters even see mouse events for
+\l{QWidget::isEnabled()}{disabled widgets}. Note that application
+event filters are only called for objects that live in the main
+thread.
+\i Reimplementing QObject::event() (as QWidget does). If you do
+this you get Tab key presses, and you get to see the events before
+any widget-specific event filters.
+\i Installing an event filter on the object. Such an event filter gets all
+the events, including Tab and Shift+Tab key press events, as long as they
+do not change the focus widget.
+\endlist
+\sa QObject::event(), installEventFilter()
+*/
+bool QCoreApplication::notify(QObject *receiver, QEvent *event)
+{
+Q_D(QCoreApplication);
+// no events are delivered after ~QCoreApplication() has started
+if (QCoreApplicationPrivate::is_app_closing)
+return true;
+if (receiver == 0) {                        // serious error
+qWarning("QCoreApplication::notify: Unexpected null receiver");
+return true;
+}
+#ifndef QT_NO_DEBUG
+d->checkReceiverThread(receiver);
+#endif
+#ifdef QT3_SUPPORT
+if (event->type() == QEvent::ChildRemoved && !receiver->d_func()->pendingChildInsertedEvents.isEmpty())
+receiver->d_func()->removePendingChildInsertedEvents(static_cast<QChildEvent *>(event)->child());
+#endif // QT3_SUPPORT
+return receiver->isWidgetType() ? false : d->notify_helper(receiver, event);
+}
+bool QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject *receiver, QEvent *event)
+{
+if (receiver->d_func()->threadData == this->threadData) {
+// application event filters are only called for objects in the GUI thread
+for (int i = 0; i < eventFilters.size(); ++i) {
+register QObject *obj = eventFilters.at(i);
+if (!obj)
+continue;
+if (obj->d_func()->threadData != threadData) {
+qWarning("QCoreApplication: Application event filter cannot be in a different thread.");
+continue;
+}
+if (obj->eventFilter(receiver, event))
+return true;
+}
+}
+return false;
+}
+bool QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject *receiver, QEvent *event)
+{
+Q_Q(QCoreApplication);
+if (receiver != q) {
+for (int i = 0; i < receiver->d_func()->eventFilters.size(); ++i) {
+register QObject *obj = receiver->d_func()->eventFilters.at(i);
+if (!obj)
+continue;
+if (obj->d_func()->threadData != receiver->d_func()->threadData) {
+qWarning("QCoreApplication: Object event filter cannot be in a different thread.");
+continue;
+}
+if (obj->eventFilter(receiver, event))
+return true;
+}
+}
+return false;
+}
+/*!\internal
+Helper function called by notify()
+*/
+bool QCoreApplicationPrivate::notify_helper(QObject *receiver, QEvent * event)
+{
+// send to all application event filters
+if (sendThroughApplicationEventFilters(receiver, event))
+return true;
+// send to all receiver event filters
+if (sendThroughObjectEventFilters(receiver, event))
+return true;
+// deliver the event
+return receiver->event(event);
+}
+/*!
+Returns true if an application object has not been created yet;
+otherwise returns false.
+\sa closingDown()
+*/
+bool QCoreApplication::startingUp()
+{
+return !QCoreApplicationPrivate::is_app_running;
+}
+/*!
+Returns true if the application objects are being destroyed;
+otherwise returns false.
+\sa startingUp()
+*/
+bool QCoreApplication::closingDown()
+{
+return QCoreApplicationPrivate::is_app_closing;
+}
+/*!
+Processes all pending events for the calling thread according to
+the specified \a flags until there are no more events to process.
+You can call this function occasionally when your program is busy
+performing a long operation (e.g. copying a file).
+In event you are running a local loop which calls this function
+continuously, without an event loop, the
+\l{QEvent::DeferredDelete}{DeferredDelete} events will
+not be processed. This can affect the behaviour of widgets,
+e.g. QToolTip, that rely on \l{QEvent::DeferredDelete}{DeferredDelete}
+events to function properly. An alternative would be to call
+\l{QCoreApplication::sendPostedEvents()}{sendPostedEvents()} from
+within that local loop.
+Calling this function processes events only for the calling thread.
+\threadsafe
+\sa exec(), QTimer, QEventLoop::processEvents(), flush(), sendPostedEvents()
+*/
+void QCoreApplication::processEvents(QEventLoop::ProcessEventsFlags flags)
+{
+QThreadData *data = QThreadData::current();
+if (!data->eventDispatcher)
+return;
+if (flags & QEventLoop::DeferredDeletion)
+QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
+data->eventDispatcher->processEvents(flags);
+}
+/*!
+\overload processEvents()
+Processes pending events for the calling thread for \a maxtime
+milliseconds or until there are no more events to process,
+whichever is shorter.
+You can call this function occasionally when you program is busy
+doing a long operation (e.g. copying a file).
+Calling this function processes events only for the calling thread.
+\threadsafe
+\sa exec(), QTimer, QEventLoop::processEvents()
+*/
+void QCoreApplication::processEvents(QEventLoop::ProcessEventsFlags flags, int maxtime)
+{
+QThreadData *data = QThreadData::current();
+if (!data->eventDispatcher)
+return;
+QTime start;
+start.start();
+if (flags & QEventLoop::DeferredDeletion)
+QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
+while (data->eventDispatcher->processEvents(flags & ~QEventLoop::WaitForMoreEvents)) {
+if (start.elapsed() > maxtime)
+break;
+if (flags & QEventLoop::DeferredDeletion)
+QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);
+}
+}
+/*****************************************************************************
+Main event loop wrappers
+*****************************************************************************/
+/*!
+Enters the main event loop and waits until exit() is called.
+Returns the value that was set to exit() (which is 0 if exit() is
+called via quit()).
+It is necessary to call this function to start event handling. The
+main event loop receives events from the window system and
+dispatches these to the application widgets.
+To make your application perform idle processing (i.e. executing a
+special function whenever there are no pending events), use a
+QTimer with 0 timeout. More advanced idle processing schemes can
+be achieved using processEvents().
+We recommend that you connect clean-up code to the
+\l{QCoreApplication::}{aboutToQuit()} signal, instead of putting it in
+your application's \c{main()} function because on some platforms the
+QCoreApplication::exec() call may not return. For example, on Windows
+when the user logs off, the system terminates the process after Qt
+closes all top-level windows. Hence, there is no guarantee that the
+application will have time to exit its event loop and execute code at
+the end of the \c{main()} function after the QCoreApplication::exec()
+call.
+\sa quit(), exit(), processEvents(), QApplication::exec()
+*/
+int QCoreApplication::exec()
+{
+if (!QCoreApplicationPrivate::checkInstance("exec"))
+return -1;
+QThreadData *threadData = self->d_func()->threadData;
+if (threadData != QThreadData::current()) {
+qWarning("%s::exec: Must be called from the main thread", self->metaObject()->className());
+return -1;
+}
+if (!threadData->eventLoops.isEmpty()) {
+qWarning("QCoreApplication::exec: The event loop is already running");
+return -1;
+}
+threadData->quitNow = false;
+QEventLoop eventLoop;
+self->d_func()->in_exec = true;
+self->d_func()->aboutToQuitEmitted = false;
+int returnCode = eventLoop.exec();
+threadData->quitNow = false;
+if (self) {
+self->d_func()->in_exec = false;
+if (!self->d_func()->aboutToQuitEmitted)
+emit self->aboutToQuit();
+self->d_func()->aboutToQuitEmitted = true;
+sendPostedEvents(0, QEvent::DeferredDelete);
+}
+return returnCode;
+}
+/*!
+Tells the application to exit with a return code.
+After this function has been called, the application leaves the
+main event loop and returns from the call to exec(). The exec()
+function returns \a returnCode. If the event loop is not running,
+this function does nothing.
+By convention, a \a returnCode of 0 means success, and any non-zero
+value indicates an error.
+Note that unlike the C library function of the same name, this
+function \e does return to the caller -- it is event processing that
+stops.
+\sa quit(), exec()
+*/
+void QCoreApplication::exit(int returnCode)
+{
+if (!self)
+return;
+QThreadData *data = self->d_func()->threadData;
+data->quitNow = true;
+for (int i = 0; i < data->eventLoops.size(); ++i) {
+QEventLoop *eventLoop = data->eventLoops.at(i);
+eventLoop->exit(returnCode);
+}
+}
+/*****************************************************************************
+QCoreApplication management of posted events
+*****************************************************************************/
+/*!
+\fn bool QCoreApplication::sendEvent(QObject *receiver, QEvent *event)
+Sends event \a event directly to receiver \a receiver, using the
+notify() function. Returns the value that was returned from the
+event handler.
+The event is \e not deleted when the event has been sent. The normal
+approach is to create the event on the stack, for example:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 0
+\sa postEvent(), notify()
+*/
+/*!
+Adds the event \a event, with the object \a receiver as the
+receiver of the event, to an event queue and returns immediately.
+The event must be allocated on the heap since the post event queue
+will take ownership of the event and delete it once it has been
+posted.  It is \e {not safe} to modify or delete the event after
+it has been posted.
+When control returns to the main event loop, all events that are
+stored in the queue will be sent using the notify() function.
+Events are processed in the order posted. For more control over
+the processing order, use the postEvent() overload below, which
+takes a priority argument. This function posts all event with a
+Qt::NormalEventPriority.
+\threadsafe
+\sa sendEvent(), notify(), sendPostedEvents()
+*/
+void QCoreApplication::postEvent(QObject *receiver, QEvent *event)
+{
+postEvent(receiver, event, Qt::NormalEventPriority);
+}
+/*!
+\overload postEvent()
+\since 4.3
+Adds the event \a event, with the object \a receiver as the
+receiver of the event, to an event queue and returns immediately.
+The event must be allocated on the heap since the post event queue
+will take ownership of the event and delete it once it has been
+posted.  It is \e {not safe} to modify or delete the event after
+it has been posted.
+When control returns to the main event loop, all events that are
+stored in the queue will be sent using the notify() function.
+Events are sorted in descending \a priority order, i.e. events
+with a high \a priority are queued before events with a lower \a
+priority. The \a priority can be any integer value, i.e. between
+INT_MAX and INT_MIN, inclusive; see Qt::EventPriority for more
+details. Events with equal \a priority will be processed in the
+order posted.
+\threadsafe
+\sa sendEvent(), notify(), sendPostedEvents(), Qt::EventPriority
+*/
+void QCoreApplication::postEvent(QObject *receiver, QEvent *event, int priority)
+{
+if (receiver == 0) {
+qWarning("QCoreApplication::postEvent: Unexpected null receiver");
+delete event;
+return;
+}
+QThreadData * volatile * pdata = &receiver->d_func()->threadData;
+QThreadData *data = *pdata;
+if (!data) {
+// posting during destruction? just delete the event to prevent a leak
+delete event;
+return;
+}
+// lock the post event mutex
+data->postEventList.mutex.lock();
+// if object has moved to another thread, follow it
+while (data != *pdata) {
+data->postEventList.mutex.unlock();
+data = *pdata;
+if (!data) {
+// posting during destruction? just delete the event to prevent a leak
+delete event;
+return;
+}
+data->postEventList.mutex.lock();
+}
+QMutexUnlocker locker(&data->postEventList.mutex);
+// if this is one of the compressible events, do compression
+if (receiver->d_func()->postedEvents
+&& self && self->compressEvent(event, receiver, &data->postEventList)) {
+return;
+}
+if (event->type() == QEvent::DeferredDelete && data == QThreadData::current()) {
+// remember the current running eventloop for DeferredDelete
+// events posted in the receiver's thread
+event->d = reinterpret_cast<QEventPrivate *>(quintptr(data->loopLevel));
+}
+// delete the event on exceptions to protect against memory leaks till the event is
+// properly owned in the postEventList
+QScopedPointer<QEvent> eventDeleter(event);
+if (data->postEventList.isEmpty() || data->postEventList.last().priority >= priority) {
+// optimization: we can simply append if the last event in
+// the queue has higher or equal priority
+data->postEventList.append(QPostEvent(receiver, event, priority));
+} else {
+// insert event in descending priority order, using upper
+// bound for a given priority (to ensure proper ordering
+// of events with the same priority)
+QPostEventList::iterator begin = data->postEventList.begin()
++ data->postEventList.insertionOffset,
+end = data->postEventList.end();
+QPostEventList::iterator at = qUpperBound(begin, end, priority);
+data->postEventList.insert(at, QPostEvent(receiver, event, priority));
+}
+eventDeleter.take();
+event->posted = true;
+++receiver->d_func()->postedEvents;
+data->canWait = false;
+locker.unlock();
+if (data->eventDispatcher)
+data->eventDispatcher->wakeUp();
+}
+/*!
+\internal
+Returns true if \a event was compressed away (possibly deleted) and should not be added to the list.
+*/
+bool QCoreApplication::compressEvent(QEvent *event, QObject *receiver, QPostEventList *postedEvents)
+{
+#ifdef Q_WS_WIN
+Q_ASSERT(event);
+Q_ASSERT(receiver);
+Q_ASSERT(postedEvents);
+// compress posted timers to this object.
+if (event->type() == QEvent::Timer && receiver->d_func()->postedEvents > 0) {
+int timerId = ((QTimerEvent *) event)->timerId();
+for (int i=0; i<postedEvents->size(); ++i) {
+const QPostEvent &e = postedEvents->at(i);
+if (e.receiver == receiver && e.event && e.event->type() == QEvent::Timer
+&& ((QTimerEvent *) e.event)->timerId() == timerId) {
+delete event;
+return true;
+}
+}
+} else
+#endif
+if ((event->type() == QEvent::DeferredDelete
+|| event->type() == QEvent::Quit)
+&& receiver->d_func()->postedEvents > 0) {
+for (int i = 0; i < postedEvents->size(); ++i) {
+const QPostEvent &cur = postedEvents->at(i);
+if (cur.receiver != receiver
+|| cur.event == 0
+|| cur.event->type() != event->type())
+continue;
+// found an event for this receiver
+delete event;
+return true;
+}
+}
+return false;
+}
+/*!
+\fn void QCoreApplication::sendPostedEvents()
+\overload sendPostedEvents()
+Dispatches all posted events, i.e. empties the event queue.
+*/
+/*!
+Immediately dispatches all events which have been previously queued
+with QCoreApplication::postEvent() and which are for the object \a receiver
+and have the event type \a event_type.
+Events from the window system are \e not dispatched by this
+function, but by processEvents().
+If \a receiver is null, the events of \a event_type are sent for all
+objects. If \a event_type is 0, all the events are sent for \a receiver.
+\note This method must be called from the same thread as its QObject parameter, \a receiver.
+\sa flush(), postEvent()
+*/
+void QCoreApplication::sendPostedEvents(QObject *receiver, int event_type)
+{
+QThreadData *data = QThreadData::current();
+QCoreApplicationPrivate::sendPostedEvents(receiver, event_type, data);
+}
+void QCoreApplicationPrivate::sendPostedEvents(QObject *receiver, int event_type,
+QThreadData *data)
+{
+if (event_type == -1) {
+// we were called by an obsolete event dispatcher.
+event_type = 0;
+}
+if (receiver && receiver->d_func()->threadData != data) {
+qWarning("QCoreApplication::sendPostedEvents: Cannot send "
+"posted events for objects in another thread");
+return;
+}
+++data->postEventList.recursion;
+#ifdef QT3_SUPPORT
+if (event_type == QEvent::ChildInserted) {
+if (receiver) {
+// optimize sendPostedEvents(w, QEvent::ChildInserted) calls away
+receiver->d_func()->sendPendingChildInsertedEvents();
+--data->postEventList.recursion;
+return;
+}
+// ChildInserted events are sent in response to *Request
+event_type = QEvent::ChildInsertedRequest;
+}
+#endif
+QMutexLocker locker(&data->postEventList.mutex);
+// by default, we assume that the event dispatcher can go to sleep after
+// processing all events. if any new events are posted while we send
+// events, canWait will be set to false.
+data->canWait = (data->postEventList.size() == 0);
+if (data->postEventList.size() == 0 || (receiver && !receiver->d_func()->postedEvents)) {
+--data->postEventList.recursion;
+return;
+}
+data->canWait = true;
+// okay. here is the tricky loop. be careful about optimizing
+// this, it looks the way it does for good reasons.
+int startOffset = data->postEventList.startOffset;
+int &i = (!event_type && !receiver) ? data->postEventList.startOffset : startOffset;
+data->postEventList.insertionOffset = data->postEventList.size();
+while (i < data->postEventList.size()) {
+// avoid live-lock
+if (i >= data->postEventList.insertionOffset)
+break;
+const QPostEvent &pe = data->postEventList.at(i);
+++i;
+if (!pe.event)
+continue;
+if ((receiver && receiver != pe.receiver) || (event_type && event_type != pe.event->type())) {
+data->canWait = false;
+continue;
+}
+if (pe.event->type() == QEvent::DeferredDelete) {
+// DeferredDelete events are only sent when we are explicitly asked to
+// (s.a. QEvent::DeferredDelete), and then only if the event loop that
+// posted the event has returned.
+const bool allowDeferredDelete =
+(quintptr(pe.event->d) > unsigned(data->loopLevel)
+|| (!quintptr(pe.event->d) && data->loopLevel > 0)
+|| (event_type == QEvent::DeferredDelete
+&& quintptr(pe.event->d) == unsigned(data->loopLevel)));
+if (!allowDeferredDelete) {
+// cannot send deferred delete
+if (!event_type && !receiver) {
+// don't lose the event
+data->postEventList.append(pe);
+const_cast<QPostEvent &>(pe).event = 0;
+}
+continue;
+}
+}
+// first, we diddle the event so that we can deliver
+// it, and that no one will try to touch it later.
+pe.event->posted = false;
+QEvent * e = pe.event;
+QObject * r = pe.receiver;
+--r->d_func()->postedEvents;
+Q_ASSERT(r->d_func()->postedEvents >= 0);
+// next, update the data structure so that we're ready
+// for the next event.
+const_cast<QPostEvent &>(pe).event = 0;
+locker.unlock();
+// after all that work, it's time to deliver the event.
+#ifdef QT_NO_EXCEPTIONS
+QCoreApplication::sendEvent(r, e);
+#else
+try {
+QCoreApplication::sendEvent(r, e);
+} catch (...) {
+delete e;
+locker.relock();
+// since we were interrupted, we need another pass to make sure we clean everything up
+data->canWait = false;
+// uglehack: copied from below
+--data->postEventList.recursion;
+if (!data->postEventList.recursion && !data->canWait && data->eventDispatcher)
+data->eventDispatcher->wakeUp();
+throw;              // rethrow
+}
+#endif
+delete e;
+locker.relock();
+// careful when adding anything below this point - the
+// sendEvent() call might invalidate any invariants this
+// function depends on.
+}
+--data->postEventList.recursion;
+if (!data->postEventList.recursion && !data->canWait && data->eventDispatcher)
+data->eventDispatcher->wakeUp();
+// clear the global list, i.e. remove everything that was
+// delivered.
+if (!event_type && !receiver && data->postEventList.startOffset >= 0) {
+const QPostEventList::iterator it = data->postEventList.begin();
+data->postEventList.erase(it, it + data->postEventList.startOffset);
+data->postEventList.insertionOffset -= data->postEventList.startOffset;
+Q_ASSERT(data->postEventList.insertionOffset >= 0);
+data->postEventList.startOffset = 0;
+}
+}
+/*!
+Removes all events posted using postEvent() for \a receiver.
+The events are \e not dispatched, instead they are removed from the
+queue. You should never need to call this function. If you do call it,
+be aware that killing events may cause \a receiver to break one or
+more invariants.
+\threadsafe
+*/
+void QCoreApplication::removePostedEvents(QObject *receiver)
+{
+removePostedEvents(receiver, 0);
+}
+/*!
+\overload removePostedEvents()
+\since 4.3
+Removes all events of the given \a eventType that were posted
+using postEvent() for \a receiver.
+The events are \e not dispatched, instead they are removed from
+the queue. You should never need to call this function. If you do
+call it, be aware that killing events may cause \a receiver to
+break one or more invariants.
+If \a receiver is null, the events of \a eventType are removed for
+all objects. If \a eventType is 0, all the events are removed for
+\a receiver.
+\threadsafe
+*/
+void QCoreApplication::removePostedEvents(QObject *receiver, int eventType)
+{
+#ifdef QT3_SUPPORT
+if (eventType == QEvent::ChildInserted)
+eventType = QEvent::ChildInsertedRequest;
+#endif
+QThreadData *data = receiver ? receiver->d_func()->threadData : QThreadData::current();
+QMutexLocker locker(&data->postEventList.mutex);
+// the QObject destructor calls this function directly.  this can
+// happen while the event loop is in the middle of posting events,
+// and when we get here, we may not have any more posted events
+// for this object.
+if (receiver && !receiver->d_func()->postedEvents)
+return;
+//we will collect all the posted events for the QObject
+//and we'll delete after the mutex was unlocked
+QVarLengthArray<QEvent*> events;
+int n = data->postEventList.size();
+int j = 0;
+for (int i = 0; i < n; ++i) {
+const QPostEvent &pe = data->postEventList.at(i);
+if ((!receiver || pe.receiver == receiver)
+&& (pe.event && (eventType == 0 || pe.event->type() == eventType))) {
+--pe.receiver->d_func()->postedEvents;
+#ifdef QT3_SUPPORT
+if (pe.event->type() == QEvent::ChildInsertedRequest)
+pe.receiver->d_func()->removePendingChildInsertedEvents(0);
+#endif
+pe.event->posted = false;
+events.append(pe.event);
+const_cast<QPostEvent &>(pe).event = 0;
+} else if (!data->postEventList.recursion) {
+if (i != j)
+data->postEventList.swap(i, j);
+++j;
+}
+}
+#ifdef QT_DEBUG
+if (receiver && eventType == 0) {
+Q_ASSERT(!receiver->d_func()->postedEvents);
+}
+#endif
+if (!data->postEventList.recursion) {
+// truncate list
+data->postEventList.erase(data->postEventList.begin() + j, data->postEventList.end());
+}
+locker.unlock();
+for (int i = 0; i < events.count(); ++i) {
+delete events[i];
+}
+}
+/*!
+Removes \a event from the queue of posted events, and emits a
+warning message if appropriate.
+\warning This function can be \e really slow. Avoid using it, if
+possible.
+\threadsafe
+*/
+void QCoreApplicationPrivate::removePostedEvent(QEvent * event)
+{
+if (!event || !event->posted)
+return;
+QThreadData *data = QThreadData::current();
+QMutexLocker locker(&data->postEventList.mutex);
+if (data->postEventList.size() == 0) {
+#if defined(QT_DEBUG)
+qDebug("QCoreApplication::removePostedEvent: Internal error: %p %d is posted",
+(void*)event, event->type());
+return;
+#endif
+}
+for (int i = 0; i < data->postEventList.size(); ++i) {
+const QPostEvent & pe = data->postEventList.at(i);
+if (pe.event == event) {
+#ifndef QT_NO_DEBUG
+qWarning("QCoreApplication::removePostedEvent: Event of type %d deleted while posted to %s %s",
+event->type(),
+pe.receiver->metaObject()->className(),
+pe.receiver->objectName().toLocal8Bit().data());
+#endif
+--pe.receiver->d_func()->postedEvents;
+pe.event->posted = false;
+delete pe.event;
+const_cast<QPostEvent &>(pe).event = 0;
+return;
+}
+}
+}
+/*!\reimp
+*/
+bool QCoreApplication::event(QEvent *e)
+{
+if (e->type() == QEvent::Quit) {
+quit();
+return true;
+}
+return QObject::event(e);
+}
+/*! \enum QCoreApplication::Encoding
+This enum type defines the 8-bit encoding of character string
+arguments to translate():
+\value CodecForTr  The encoding specified by
+QTextCodec::codecForTr() (Latin-1 if none has
+been set).
+\value UnicodeUTF8  UTF-8.
+\value DefaultCodec  (Obsolete) Use CodecForTr instead.
+\sa QObject::tr(), QObject::trUtf8(), QString::fromUtf8()
+*/
+/*!
+Tells the application to exit with return code 0 (success).
+Equivalent to calling QCoreApplication::exit(0).
+It's common to connect the QApplication::lastWindowClosed() signal
+to quit(), and you also often connect e.g. QAbstractButton::clicked() or
+signals in QAction, QMenu, or QMenuBar to it.
+Example:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 1
+\sa exit(), aboutToQuit(), QApplication::lastWindowClosed()
+*/
+void QCoreApplication::quit()
+{
+exit(0);
+}
+/*!
+\fn void QCoreApplication::aboutToQuit()
+This signal is emitted when the application is about to quit the
+main event loop, e.g. when the event loop level drops to zero.
+This may happen either after a call to quit() from inside the
+application or when the users shuts down the entire desktop session.
+The signal is particularly useful if your application has to do some
+last-second cleanup. Note that no user interaction is possible in
+this state.
+\sa quit()
+*/
+#ifndef QT_NO_TRANSLATION
+/*!
+Adds the translation file \a translationFile to the list of
+translation files to be used for translations.
+Multiple translation files can be installed. Translations are
+searched for in the reverse order in which they were installed,
+so the most recently installed translation file is searched first
+and the first translation file installed is searched last.
+The search stops as soon as a translation containing a matching
+string is found.
+Installing or removing a QTranslator, or changing an installed QTranslator
+generates a \l{QEvent::LanguageChange}{LanguageChange} event for the
+QCoreApplication instance. A QApplication instance will propagate the event
+to all toplevel windows, where a reimplementation of changeEvent can
+re-translate the user interface by passing user-visible strings via the
+tr() function to the respective property setters. User-interface classes
+generated by \l{Qt Designer} provide a \c retranslateUi() function that can be
+called.
+\sa removeTranslator() translate() QTranslator::load() {Dynamic Translation}
+*/
+void QCoreApplication::installTranslator(QTranslator *translationFile)
+{
+if (!translationFile)
+return;
+if (!QCoreApplicationPrivate::checkInstance("installTranslator"))
+return;
+QCoreApplicationPrivate *d = self->d_func();
+d->translators.prepend(translationFile);
+#ifndef QT_NO_TRANSLATION_BUILDER
+if (translationFile->isEmpty())
+return;
+#endif
+QEvent ev(QEvent::LanguageChange);
+QCoreApplication::sendEvent(self, &ev);
+}
+/*!
+Removes the translation file \a translationFile from the list of
+translation files used by this application. (It does not delete the
+translation file from the file system.)
+\sa installTranslator() translate(), QObject::tr()
+*/
+void QCoreApplication::removeTranslator(QTranslator *translationFile)
+{
+if (!translationFile)
+return;
+if (!QCoreApplicationPrivate::checkInstance("removeTranslator"))
+return;
+QCoreApplicationPrivate *d = self->d_func();
+if (d->translators.removeAll(translationFile) && !self->closingDown()) {
+QEvent ev(QEvent::LanguageChange);
+QCoreApplication::sendEvent(self, &ev);
+}
+}
+/*!
+\overload translate()
+*/
+QString QCoreApplication::translate(const char *context, const char *sourceText,
+const char *disambiguation, Encoding encoding)
+{
+return translate(context, sourceText, disambiguation, encoding, -1);
+}
+static void replacePercentN(QString *result, int n)
+{
+if (n >= 0) {
+int percentPos = 0;
+int len = 0;
+while ((percentPos = result->indexOf(QLatin1Char('%'), percentPos + len)) != -1) {
+len = 1;
+QString fmt;
+if (result->at(percentPos + len) == QLatin1Char('L')) {
+++len;
+fmt = QLatin1String("%L1");
+} else {
+fmt = QLatin1String("%1");
+}
+if (result->at(percentPos + len) == QLatin1Char('n')) {
+fmt = fmt.arg(n);
+++len;
+result->replace(percentPos, len, fmt);
+len = fmt.length();
+}
+}
+}
+}
+/*!
+\reentrant
+\since 4.5
+Returns the translation text for \a sourceText, by querying the
+installed translation files. The translation files are searched
+from the most recently installed file back to the first
+installed file.
+QObject::tr() and QObject::trUtf8() provide this functionality
+more conveniently.
+\a context is typically a class name (e.g., "MyDialog") and \a
+sourceText is either English text or a short identifying text.
+\a disambiguation is an identifying string, for when the same \a
+sourceText is used in different roles within the same context. By
+default, it is null.
+See the \l QTranslator and \l QObject::tr() documentation for
+more information about contexts, disambiguations and comments.
+\a encoding indicates the 8-bit encoding of character strings.
+\a n is used in conjunction with \c %n to support plural forms.
+See QObject::tr() for details.
+If none of the translation files contain a translation for \a
+sourceText in \a context, this function returns a QString
+equivalent of \a sourceText. The encoding of \a sourceText is
+specified by \e encoding; it defaults to CodecForTr.
+This function is not virtual. You can use alternative translation
+techniques by subclassing \l QTranslator.
+\warning This method is reentrant only if all translators are
+installed \e before calling this method. Installing or removing
+translators while performing translations is not supported. Doing
+so will most likely result in crashes or other undesirable
+behavior.
+\sa QObject::tr() installTranslator() QTextCodec::codecForTr()
+*/
+QString QCoreApplication::translate(const char *context, const char *sourceText,
+const char *disambiguation, Encoding encoding, int n)
+{
+QString result;
+if (!sourceText)
+return result;
+if (self && !self->d_func()->translators.isEmpty()) {
+QList<QTranslator*>::ConstIterator it;
+QTranslator *translationFile;
+for (it = self->d_func()->translators.constBegin(); it != self->d_func()->translators.constEnd(); ++it) {
+translationFile = *it;
+result = translationFile->translate(context, sourceText, disambiguation, n);
+if (!result.isEmpty())
+break;
+}
+}
+if (result.isEmpty()) {
+#ifdef QT_NO_TEXTCODEC
+Q_UNUSED(encoding)
+#else
+if (encoding == UnicodeUTF8)
+result = QString::fromUtf8(sourceText);
+else if (QTextCodec::codecForTr() != 0)
+result = QTextCodec::codecForTr()->toUnicode(sourceText);
+else
+#endif
+result = QString::fromLatin1(sourceText);
+}
+replacePercentN(&result, n);
+return result;
+}
+// Declared in qglobal.h
+QString qtTrId(const char *id, int n)
+{
+return QCoreApplication::translate(0, id, 0, QCoreApplication::UnicodeUTF8, n);
+}
+bool QCoreApplicationPrivate::isTranslatorInstalled(QTranslator *translator)
+{
+return QCoreApplication::self
+&& QCoreApplication::self->d_func()->translators.contains(translator);
+}
+#endif //QT_NO_TRANSLATE
+/*!
+Returns the directory that contains the application executable.
+For example, if you have installed Qt in the \c{C:\Trolltech\Qt}
+directory, and you run the \c{regexp} example, this function will
+return "C:/Trolltech/Qt/examples/tools/regexp".
+On Mac OS X this will point to the directory actually containing the
+executable, which may be inside of an application bundle (if the
+application is bundled).
+\warning On Linux, this function will try to get the path from the
+\c {/proc} file system. If that fails, it assumes that \c
+{argv[0]} contains the absolute file name of the executable. The
+function also assumes that the current directory has not been
+changed by the application.
+In Symbian this function will return the application private directory,
+not the path to executable itself, as those are always in \c {/sys/bin}.
+If the application is in a read only drive, i.e. ROM, then the private path
+on the system drive will be returned.
+\sa applicationFilePath()
+*/
+QString QCoreApplication::applicationDirPath()
+{
+if (!self) {
+qWarning("QCoreApplication::applicationDirPath: Please instantiate the QApplication object first");
+return QString();
+}
+QCoreApplicationPrivate *d = self->d_func();
+if (d->cachedApplicationDirPath.isNull())
+#if defined(Q_OS_SYMBIAN)
+{
+QString appPath;
+RFs& fs = qt_s60GetRFs();
+TChar driveChar;
+QChar qDriveChar;
+driveChar = (RProcess().FileName())[0];
+//Check if the process is installed in a read only drive (typically ROM),
+//and use the system drive (typically C:) if so.
+TInt drive;
+TDriveInfo driveInfo;
+TInt err = fs.CharToDrive(driveChar, drive);
+if (err == KErrNone) {
+err = fs.Drive(driveInfo, drive);
+}
+if (err != KErrNone || (driveInfo.iDriveAtt & KDriveAttRom) || (driveInfo.iMediaAtt
+& KMediaAttWriteProtected)) {
+if(!PtrGetSystemDrive)
+PtrGetSystemDrive = reinterpret_cast<SystemDriveFunc>(qt_resolveS60PluginFunc(S60Plugin_GetSystemDrive));
+Q_ASSERT(PtrGetSystemDrive);
+drive = PtrGetSystemDrive(fs);
+fs.DriveToChar(drive, driveChar);
+}
+qDriveChar = QChar(QLatin1Char(driveChar)).toUpper();
+TFileName privatePath;
+fs.PrivatePath(privatePath);
+appPath = qt_TDesC2QString(privatePath);
+appPath.prepend(QLatin1Char(':')).prepend(qDriveChar);
+// Create the appPath if it doesn't exist. Non-existing appPath will cause
+// Platform Security violations later on if the app doesn't have AllFiles capability.
+err = fs.CreatePrivatePath(drive);
+if (err != KErrNone)
+qWarning("QCoreApplication::applicationDirPath: Failed to create private path.");
+d->cachedApplicationDirPath = QFileInfo(appPath).path();
+}
+#else
+d->cachedApplicationDirPath = QFileInfo(applicationFilePath()).path();
+#endif
+return d->cachedApplicationDirPath;
+}
+/*!
+Returns the file path of the application executable.
+For example, if you have installed Qt in the \c{/usr/local/qt}
+directory, and you run the \c{regexp} example, this function will
+return "/usr/local/qt/examples/tools/regexp/regexp".
+\warning On Linux, this function will try to get the path from the
+\c {/proc} file system. If that fails, it assumes that \c
+{argv[0]} contains the absolute file name of the executable. The
+function also assumes that the current directory has not been
+changed by the application.
+\sa applicationDirPath()
+*/
+QString QCoreApplication::applicationFilePath()
+{
+if (!self) {
+qWarning("QCoreApplication::applicationFilePath: Please instantiate the QApplication object first");
+return QString();
+}
+QCoreApplicationPrivate *d = self->d_func();
+if (!d->cachedApplicationFilePath.isNull())
+return d->cachedApplicationFilePath;
+#if defined(Q_WS_WIN)
+d->cachedApplicationFilePath = QFileInfo(qAppFileName()).filePath();
+return d->cachedApplicationFilePath;
+#elif defined(Q_WS_MAC)
+QString qAppFileName_str = qAppFileName();
+if(!qAppFileName_str.isEmpty()) {
+QFileInfo fi(qAppFileName_str);
+d->cachedApplicationFilePath = fi.exists() ? fi.canonicalFilePath() : QString();
+return d->cachedApplicationFilePath;
+}
+#endif
+#if defined(Q_OS_SYMBIAN)
+QString appPath;
+RProcess proc;
+TInt err = proc.Open(proc.Id());
+if (err == KErrNone) {
+TFileName procName = proc.FileName();
+appPath.append(QString(reinterpret_cast<const QChar*>(procName.Ptr()), procName.Length()));
+proc.Close();
+}
+d->cachedApplicationFilePath = appPath;
+return d->cachedApplicationFilePath;
+#elif defined( Q_OS_UNIX )
+#  ifdef Q_OS_LINUX
+// Try looking for a /proc/<pid>/exe symlink first which points to
+// the absolute path of the executable
+QFileInfo pfi(QString::fromLatin1("/proc/%1/exe").arg(getpid()));
+if (pfi.exists() && pfi.isSymLink()) {
+d->cachedApplicationFilePath = pfi.canonicalFilePath();
+return d->cachedApplicationFilePath;
+}
+#  endif
+QString argv0 = QFile::decodeName(QByteArray(argv()[0]));
+QString absPath;
+if (!argv0.isEmpty() && argv0.at(0) == QLatin1Char('/')) {
+/*
+If argv0 starts with a slash, it is already an absolute
+file path.
+*/
+absPath = argv0;
+} else if (argv0.contains(QLatin1Char('/'))) {
+/*
+If argv0 contains one or more slashes, it is a file path
+relative to the current directory.
+*/
+absPath = QDir::current().absoluteFilePath(argv0);
+} else {
+/*
+Otherwise, the file path has to be determined using the
+PATH environment variable.
+*/
+QByteArray pEnv = qgetenv("PATH");
+QDir currentDir = QDir::current();
+QStringList paths = QString::fromLocal8Bit(pEnv.constData()).split(QLatin1Char(':'));
+for (QStringList::const_iterator p = paths.constBegin(); p != paths.constEnd(); ++p) {
+if ((*p).isEmpty())
+continue;
+QString candidate = currentDir.absoluteFilePath(*p + QLatin1Char('/') + argv0);
+QFileInfo candidate_fi(candidate);
+if (candidate_fi.exists() && !candidate_fi.isDir()) {
+absPath = candidate;
+break;
+}
+}
+}
+absPath = QDir::cleanPath(absPath);
+QFileInfo fi(absPath);
+d->cachedApplicationFilePath = fi.exists() ? fi.canonicalFilePath() : QString();
+return d->cachedApplicationFilePath;
+#endif
+}
+/*!
+\since 4.4
+Returns the current process ID for the application.
+*/
+qint64 QCoreApplication::applicationPid()
+{
+#if defined(Q_OS_WIN32) || defined(Q_OS_WINCE)
+return GetCurrentProcessId();
+#elif defined(Q_OS_VXWORKS)
+return (pid_t) taskIdCurrent;
+#else
+return getpid();
+#endif
+}
+/*!
+\obsolete
+Use arguments().size() instead.
+*/
+int QCoreApplication::argc()
+{
+if (!self) {
+qWarning("QCoreApplication::argc: Please instantiate the QApplication object first");
+return 0;
+}
+return self->d_func()->argc;
+}
+/*!
+\obsolete
+Use arguments() instead.
+*/
+char **QCoreApplication::argv()
+{
+if (!self) {
+qWarning("QCoreApplication::argv: Please instantiate the QApplication object first");
+return 0;
+}
+return self->d_func()->argv;
+}
+/*!
+\since 4.1
+Returns the list of command-line arguments.
+Usually arguments().at(0) is the program name, arguments().at(1)
+is the first argument, and arguments().last() is the last
+argument. See the note below about Windows.
+Calling this function is slow - you should store the result in a variable
+when parsing the command line.
+\warning On Unix, this list is built from the argc and argv parameters passed
+to the constructor in the main() function. The string-data in argv is
+interpreted using QString::fromLocal8Bit(); hence it is not possible to
+pass, for example, Japanese command line arguments on a system that runs in a
+Latin1 locale. Most modern Unix systems do not have this limitation, as they are
+Unicode-based.
+On NT-based Windows, this limitation does not apply either.
+On Windows, the arguments() are not built from the contents of argv/argc, as
+the content does not support Unicode. Instead, the arguments() are constructed
+from the return value of
+\l{http://msdn2.microsoft.com/en-us/library/ms683156(VS.85).aspx}{GetCommandLine()}.
+As a result of this, the string given by arguments().at(0) might not be
+the program name on Windows, depending on how the application was started.
+\sa applicationFilePath()
+*/
+QStringList QCoreApplication::arguments()
+{
+QStringList list;
+if (!self) {
+qWarning("QCoreApplication::arguments: Please instantiate the QApplication object first");
+return list;
+}
+#ifdef Q_OS_WIN
+QString cmdline = QString::fromWCharArray(GetCommandLine());
+#if defined(Q_OS_WINCE)
+wchar_t tempFilename[MAX_PATH+1];
+if (GetModuleFileName(0, tempFilename, MAX_PATH)) {
+tempFilename[MAX_PATH] = 0;
+cmdline.prepend(QLatin1Char('\"') + QString::fromWCharArray(tempFilename) + QLatin1String("\" "));
+}
+#endif // Q_OS_WINCE
+list = qWinCmdArgs(cmdline);
+if (self->d_func()->application_type) { // GUI app? Skip known - see qapplication.cpp
+QStringList stripped;
+for (int a = 0; a < list.count(); ++a) {
+QString arg = list.at(a);
+QByteArray l1arg = arg.toLatin1();
+if (l1arg == "-qdevel" ||
+l1arg == "-qdebug" ||
+l1arg == "-reverse" ||
+l1arg == "-stylesheet" ||
+l1arg == "-widgetcount")
+;
+else if (l1arg.startsWith("-style="))
+;
+else if (l1arg == "-style" ||
+l1arg == "-session" ||
+l1arg == "-graphicssystem" ||
+l1arg == "-testability")
+++a;
+else
+stripped += arg;
+}
+list = stripped;
+}
+#else
+const int ac = self->d_func()->argc;
+char ** const av = self->d_func()->argv;
+for (int a = 0; a < ac; ++a) {
+list << QString::fromLocal8Bit(av[a]);
+}
+#endif
+return list;
+}
+/*!
+\property QCoreApplication::organizationName
+\brief the name of the organization that wrote this application
+The value is used by the QSettings class when it is constructed
+using the empty constructor. This saves having to repeat this
+information each time a QSettings object is created.
+On Mac, QSettings uses organizationDomain() as the organization
+if it's not an empty string; otherwise it uses
+organizationName(). On all other platforms, QSettings uses
+organizationName() as the organization.
+\sa organizationDomain applicationName
+*/
+void QCoreApplication::setOrganizationName(const QString &orgName)
+{
+coreappdata()->orgName = orgName;
+}
+QString QCoreApplication::organizationName()
+{
+return coreappdata()->orgName;
+}
+/*!
+\property QCoreApplication::organizationDomain
+\brief the Internet domain of the organization that wrote this application
+The value is used by the QSettings class when it is constructed
+using the empty constructor. This saves having to repeat this
+information each time a QSettings object is created.
+On Mac, QSettings uses organizationDomain() as the organization
+if it's not an empty string; otherwise it uses organizationName().
+On all other platforms, QSettings uses organizationName() as the
+organization.
+\sa organizationName applicationName applicationVersion
+*/
+void QCoreApplication::setOrganizationDomain(const QString &orgDomain)
+{
+coreappdata()->orgDomain = orgDomain;
+}
+QString QCoreApplication::organizationDomain()
+{
+return coreappdata()->orgDomain;
+}
+/*!
+\property QCoreApplication::applicationName
+\brief the name of this application
+The value is used by the QSettings class when it is constructed
+using the empty constructor. This saves having to repeat this
+information each time a QSettings object is created.
+\sa organizationName organizationDomain applicationVersion
+*/
+void QCoreApplication::setApplicationName(const QString &application)
+{
+coreappdata()->application = application;
+}
+QString QCoreApplication::applicationName()
+{
+return coreappdata()->application;
+}
+/*!
+\property QCoreApplication::applicationVersion
+\since 4.4
+\brief the version of this application
+\sa applicationName organizationName organizationDomain
+*/
+void QCoreApplication::setApplicationVersion(const QString &version)
+{
+coreappdata()->applicationVersion = version;
+}
+QString QCoreApplication::applicationVersion()
+{
+return coreappdata()->applicationVersion;
+}
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+Q_GLOBAL_STATIC_WITH_ARGS(QMutex, libraryPathMutex, (QMutex::Recursive))
+/*!
+Returns a list of paths that the application will search when
+dynamically loading libraries.
+Qt provides default library paths, but they can also be set using
+a \l{Using qt.conf}{qt.conf} file. Paths specified in this file
+will override default values.
+This list will include the installation directory for plugins if
+it exists (the default installation directory for plugins is \c
+INSTALL/plugins, where \c INSTALL is the directory where Qt was
+installed).  The directory of the application executable (NOT the
+working directory) is always added, as well as the colon separated
+entries of the QT_PLUGIN_PATH environment variable.
+If you want to iterate over the list, you can use the \l foreach
+pseudo-keyword:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 2
+\sa setLibraryPaths(), addLibraryPath(), removeLibraryPath(), QLibrary,
+{How to Create Qt Plugins}
+*/
+QStringList QCoreApplication::libraryPaths()
+{
+QMutexLocker locker(libraryPathMutex());
+if (!coreappdata()->app_libpaths) {
+QStringList *app_libpaths = coreappdata()->app_libpaths = new QStringList;
+QString installPathPlugins =  QLibraryInfo::location(QLibraryInfo::PluginsPath);
+#if defined(Q_OS_SYMBIAN)
+// Add existing path on all drives for relative PluginsPath in Symbian
+if (installPathPlugins.at(1) != QChar(QLatin1Char(':'))) {
+QString tempPath = installPathPlugins;
+if (tempPath.at(tempPath.length() - 1) != QDir::separator()) {
+tempPath += QDir::separator();
+}
+RFs& fs = qt_s60GetRFs();
+TPtrC tempPathPtr(reinterpret_cast<const TText*> (tempPath.constData()));
+TFindFile finder(fs);
+TInt err = finder.FindByDir(tempPathPtr, tempPathPtr);
+while (err == KErrNone) {
+QString foundDir = QString::fromUtf16(finder.File().Ptr(), finder.File().Length());
+foundDir = QDir(foundDir).canonicalPath();
+if (!app_libpaths->contains(foundDir))
+app_libpaths->append(foundDir);
+err = finder.Find();
+}
+}
+#else
+if (QFile::exists(installPathPlugins)) {
+// Make sure we convert from backslashes to slashes.
+installPathPlugins = QDir(installPathPlugins).canonicalPath();
+if (!app_libpaths->contains(installPathPlugins))
+app_libpaths->append(installPathPlugins);
+}
+#endif
+// If QCoreApplication is not yet instantiated,
+// make sure we add the application path when we construct the QCoreApplication
+if (self) self->d_func()->appendApplicationPathToLibraryPaths();
+const QByteArray libPathEnv = qgetenv("QT_PLUGIN_PATH");
+if (!libPathEnv.isEmpty()) {
+#if defined(Q_OS_WIN) || defined(Q_OS_SYMBIAN)
+QLatin1Char pathSep(';');
+#else
+QLatin1Char pathSep(':');
+#endif
+QStringList paths = QString::fromLatin1(libPathEnv).split(pathSep, QString::SkipEmptyParts);
+for (QStringList::const_iterator it = paths.constBegin(); it != paths.constEnd(); ++it) {
+QString canonicalPath = QDir(*it).canonicalPath();
+if (!canonicalPath.isEmpty()
+&& !app_libpaths->contains(canonicalPath)) {
+app_libpaths->append(canonicalPath);
+}
+}
+}
+}
+return *(coreappdata()->app_libpaths);
+}
+/*!
+Sets the list of directories to search when loading libraries to
+\a paths. All existing paths will be deleted and the path list
+will consist of the paths given in \a paths.
+\sa libraryPaths(), addLibraryPath(), removeLibraryPath(), QLibrary
+*/
+void QCoreApplication::setLibraryPaths(const QStringList &paths)
+{
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+QMutexLocker locker(libraryPathMutex());
+if (!coreappdata()->app_libpaths)
+coreappdata()->app_libpaths = new QStringList;
+*(coreappdata()->app_libpaths) = paths;
+QFactoryLoader::refreshAll();
+#endif
+}
+/*!
+Prepends \a path to the beginning of the library path list, ensuring that
+it is searched for libraries first. If \a path is empty or already in the
+path list, the path list is not changed.
+The default path list consists of a single entry, the installation
+directory for plugins.  The default installation directory for plugins
+is \c INSTALL/plugins, where \c INSTALL is the directory where Qt was
+installed.
+\sa removeLibraryPath(), libraryPaths(), setLibraryPaths()
+*/
+void QCoreApplication::addLibraryPath(const QString &path)
+{
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+if (path.isEmpty())
+return;
+QMutexLocker locker(libraryPathMutex());
+// make sure that library paths is initialized
+libraryPaths();
+QString canonicalPath = QDir(path).canonicalPath();
+if (!canonicalPath.isEmpty()
+&& !coreappdata()->app_libpaths->contains(canonicalPath)) {
+coreappdata()->app_libpaths->prepend(canonicalPath);
+QFactoryLoader::refreshAll();
+}
+#endif
+}
+/*!
+Removes \a path from the library path list. If \a path is empty or not
+in the path list, the list is not changed.
+\sa addLibraryPath(), libraryPaths(), setLibraryPaths()
+*/
+void QCoreApplication::removeLibraryPath(const QString &path)
+{
+#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)
+if (path.isEmpty())
+return;
+QMutexLocker locker(libraryPathMutex());
+// make sure that library paths is initialized
+libraryPaths();
+QString canonicalPath = QDir(path).canonicalPath();
+coreappdata()->app_libpaths->removeAll(canonicalPath);
+QFactoryLoader::refreshAll();
+#endif
+}
+#endif //QT_NO_LIBRARY
+/*!
+\typedef QCoreApplication::EventFilter
+A function with the following signature that can be used as an
+event filter:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 3
+\sa setEventFilter()
+*/
+/*!
+\fn EventFilter QCoreApplication::setEventFilter(EventFilter filter)
+Replaces the event filter function for the QCoreApplication with
+\a filter and returns the pointer to the replaced event filter
+function. Only the current event filter function is called. If you
+want to use both filter functions, save the replaced EventFilter
+in a place where yours can call it.
+The event filter function set here is called for all messages
+received by all threads meant for all Qt objects. It is \e not
+called for messages that are not meant for Qt objects.
+The event filter function should return true if the message should
+be filtered, (i.e. stopped). It should return false to allow
+processing the message to continue.
+By default, no event filter function is set (i.e., this function
+returns a null EventFilter the first time it is called).
+\note The filter function set here receives native messages,
+i.e. MSG or XEvent structs, that are going to Qt objects. It is
+called by QCoreApplication::filterEvent(). If the filter function
+returns false to indicate the message should be processed further,
+the native message can then be translated into a QEvent and
+handled by the standard Qt \l{QEvent} {event} filering, e.g.
+QObject::installEventFilter().
+\note The filter function set here is different form the filter
+function set via QAbstractEventDispatcher::setEventFilter(), which
+gets all messages received by its thread, even messages meant for
+objects that are not handled by Qt.
+\sa QObject::installEventFilter(), QAbstractEventDispatcher::setEventFilter()
+*/
+QCoreApplication::EventFilter
+QCoreApplication::setEventFilter(QCoreApplication::EventFilter filter)
+{
+Q_D(QCoreApplication);
+EventFilter old = d->eventFilter;
+d->eventFilter = filter;
+return old;
+}
+/*!
+Sends \a message through the event filter that was set by
+setEventFilter(). If no event filter has been set, this function
+returns false; otherwise, this function returns the result of the
+event filter function in the \a result parameter.
+\sa setEventFilter()
+*/
+bool QCoreApplication::filterEvent(void *message, long *result)
+{
+Q_D(QCoreApplication);
+if (result)
+*result = 0;
+if (d->eventFilter)
+return d->eventFilter(message, result);
+#ifdef Q_OS_WIN
+return winEventFilter(reinterpret_cast<MSG *>(message), result);
+#else
+return false;
+#endif
+}
+/*!
+This function returns true if there are pending events; otherwise
+returns false. Pending events can be either from the window
+system or posted events using postEvent().
+\sa QAbstractEventDispatcher::hasPendingEvents()
+*/
+bool QCoreApplication::hasPendingEvents()
+{
+QAbstractEventDispatcher *eventDispatcher = QAbstractEventDispatcher::instance();
+if (eventDispatcher)
+return eventDispatcher->hasPendingEvents();
+return false;
+}
+#ifdef QT3_SUPPORT
+/*! \fn void QCoreApplication::lock()
+In Qt 3, this function locked the Qt library mutex, allowing
+non-GUI threads to perform basic printing operations using
+QPainter.
+In Qt 4, this is no longer supported, since painting is only
+supported from within a paint event handler. This function does
+nothing.
+\sa QWidget::paintEvent()
+*/
+/*! \fn void QCoreApplication::unlock(bool wakeUpGui)
+In Qt 3, this function unlocked the Qt library mutex. The mutex
+allowed non-GUI threads to perform basic printing operations
+using QPainter.
+In Qt 4, this is no longer supported, since painting is only
+supported from within a paint event handler. This function does
+nothing.
+*/
+/*! \fn bool QCoreApplication::locked()
+This function does nothing. It is there to keep old code working.
+It always returns false.
+See lock() for details.
+*/
+/*! \fn bool QCoreApplication::tryLock()
+This function does nothing. It is there to keep old code working.
+It always returns false.
+See lock() for details.
+*/
+/*! \fn void QCoreApplication::processOneEvent()
+\obsolete
+Waits for an event to occur, processes it, then returns.
+This function is useful for adapting Qt to situations where the
+event processing must be grafted onto existing program loops.
+Using this function in new applications may be an indication of design
+problems.
+\sa processEvents(), exec(), QTimer
+*/
+/*! \obsolete
+This function enters the main event loop (recursively). Do not call
+it unless you really know what you are doing.
+*/
+int QCoreApplication::enter_loop()
+{
+if (!QCoreApplicationPrivate::checkInstance("enter_loop"))
+return -1;
+if (QThreadData::current() != self->d_func()->threadData) {
+qWarning("QCoreApplication::enter_loop: Must be called from the main thread");
+return -1;
+}
+QEventLoop eventLoop;
+int returnCode = eventLoop.exec();
+return returnCode;
+}
+/*! \obsolete
+This function exits from a recursive call to the main event loop.
+Do not call it unless you are an expert.
+*/
+void QCoreApplication::exit_loop()
+{
+if (!QCoreApplicationPrivate::checkInstance("exit_loop"))
+return;
+QThreadData *data = QThreadData::current();
+if (data != self->d_func()->threadData) {
+qWarning("QCoreApplication::exit_loop: Must be called from the main thread");
+return;
+}
+if (!data->eventLoops.isEmpty())
+data->eventLoops.top()->exit();
+}
+/*! \obsolete
+Returns the current loop level.
+*/
+int QCoreApplication::loopLevel()
+{
+if (!QCoreApplicationPrivate::checkInstance("loopLevel"))
+return -1;
+return self->d_func()->threadData->eventLoops.size();
+}
+#endif
+/*
+\fn void QCoreApplication::watchUnixSignal(int signal, bool watch)
+\internal
+*/
+/*!
+\fn void QCoreApplication::unixSignal(int number)
+\internal
+This signal is emitted whenever a Unix signal is received by the
+application. The Unix signal received is specified by its \a number.
+*/
+/*!
+\fn void qAddPostRoutine(QtCleanUpFunction ptr)
+\relates QCoreApplication
+Adds a global routine that will be called from the QApplication
+destructor. This function is normally used to add cleanup routines
+for program-wide functionality.
+The function specified by \a ptr should take no arguments and should
+return nothing. For example:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 4
+Note that for an application- or module-wide cleanup,
+qAddPostRoutine() is often not suitable. For example, if the
+program is split into dynamically loaded modules, the relevant
+module may be unloaded long before the QApplication destructor is
+called.
+For modules and libraries, using a reference-counted
+initialization manager or Qt's parent-child deletion mechanism may
+be better. Here is an example of a private class that uses the
+parent-child mechanism to call a cleanup function at the right
+time:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 5
+By selecting the right parent object, this can often be made to
+clean up the module's data at the right moment.
+*/
+/*!
+\macro Q_DECLARE_TR_FUNCTIONS(context)
+\relates QCoreApplication
+The Q_DECLARE_TR_FUNCTIONS() macro declares and implements two
+translation functions, \c tr() and \c trUtf8(), with these
+signatures:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 6
+This macro is useful if you want to use QObject::tr() or
+QObject::trUtf8() in classes that don't inherit from QObject.
+Q_DECLARE_TR_FUNCTIONS() must appear at the very top of the
+class definition (before the first \c{public:} or \c{protected:}).
+For example:
+\snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 7
+The \a context parameter is normally the class name, but it can
+be any string.
+\sa Q_OBJECT, QObject::tr(), QObject::trUtf8()
+*/
+QT_END_NAMESPACE

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