qguiapplication.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2016 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qguiapplication.h"
 
#include "private/qguiapplication_p.h"
#include "private/qabstractfileiconprovider_p.h"
#include <qpa/qplatformintegrationfactory_p.h>
#include "private/qevent_p.h"
#include "private/qeventpoint_p.h"
#include "private/qiconloader_p.h"
#include "qfont.h"
#include "qpointingdevice.h"
#include <qpa/qplatformfontdatabase.h>
#include <qpa/qplatformwindow.h>
#include <qpa/qplatformnativeinterface.h>
#include <qpa/qplatformtheme.h>
#include <qpa/qplatformintegration.h>
 
#include <QtCore/QAbstractEventDispatcher>
#include <QtCore/QFileInfo>
#include <QtCore/QStandardPaths>
#include <QtCore/QVariant>
#include <QtCore/private/qcoreapplication_p.h>
#include <QtCore/private/qabstracteventdispatcher_p.h>
#include <QtCore/qmutex.h>
#include <QtCore/private/qthread_p.h>
#include <QtCore/private/qlocking_p.h>
#include <QtCore/private/qflatmap_p.h>
#include <QtCore/qdir.h>
#include <QtCore/qlibraryinfo.h>
#include <QtCore/private/qnumeric_p.h>
#include <QtDebug>
#if QT_CONFIG(accessibility)
#include "qaccessible.h"
#endif
#include <qpalette.h>
#include <qscreen.h>
#include "qsessionmanager.h"
#include <private/qcolortrclut_p.h>
#include <private/qscreen_p.h>
 
#include <QtGui/qgenericpluginfactory.h>
#include <QtGui/qstylehints.h>
#include <QtGui/private/qstylehints_p.h>
#include <QtGui/qinputmethod.h>
#include <QtGui/qpixmapcache.h>
#include <qpa/qplatforminputcontext.h>
#include <qpa/qplatforminputcontext_p.h>
 
#include <qpa/qwindowsysteminterface.h>
#include <qpa/qwindowsysteminterface_p.h>
#include "private/qwindow_p.h"
#include "private/qicon_p.h"
#include "private/qcursor_p.h"
#if QT_CONFIG(opengl)
#  include "private/qopenglcontext_p.h"
#endif
#include "private/qinputdevicemanager_p.h"
#include "private/qinputmethod_p.h"
#include "private/qpointingdevice_p.h"
 
#include <qpa/qplatformthemefactory_p.h>
 
#if QT_CONFIG(draganddrop)
#include <qpa/qplatformdrag.h>
#include <private/qdnd_p.h>
#endif
 
#ifndef QT_NO_CURSOR
#include <qpa/qplatformcursor.h>
#endif
 
#include <QtGui/QPixmap>
 
#ifndef QT_NO_CLIPBOARD
#include <QtGui/QClipboard>
#endif
 
#if QT_CONFIG(library)
#include <QtCore/QLibrary>
#endif
 
#if defined(Q_OS_MAC)
#  include "private/qcore_mac_p.h"
#elif defined(Q_OS_WIN)
#  include <QtCore/qt_windows.h>
#  include <QtCore/QLibraryInfo>
#endif // Q_OS_WIN
 
#ifdef Q_OS_WASM
#include <emscripten.h>
#endif
 
#if QT_CONFIG(vulkan)
#include <private/qvulkandefaultinstance_p.h>
#endif
 
#include <qtgui_tracepoints_p.h>
 
#include <private/qtools_p.h>
 
#include <limits>
 
QT_BEGIN_NAMESPACE
 
using namespace Qt::StringLiterals;
using namespace QtMiscUtils;
 
// Helper macro for static functions to check on the existence of the application class.
#define CHECK_QAPP_INSTANCE(...) \
    if (Q_LIKELY(QCoreApplication::instance())) { \
    } else { \
        qWarning("Must construct a QGuiApplication first."); \
        return __VA_ARGS__; \
    }
 
Q_CORE_EXPORT void qt_call_post_routines();
Q_CONSTINIT Q_GUI_EXPORT bool qt_is_tty_app = false;
 
Q_CONSTINIT Qt::MouseButtons QGuiApplicationPrivate::mouse_buttons = Qt::NoButton;
Q_CONSTINIT Qt::KeyboardModifiers QGuiApplicationPrivate::modifier_buttons = Qt::NoModifier;
 
Q_CONSTINIT QGuiApplicationPrivate::QLastCursorPosition QGuiApplicationPrivate::lastCursorPosition;
 
Q_CONSTINIT QWindow *QGuiApplicationPrivate::currentMouseWindow = nullptr;
 
Q_CONSTINIT QString QGuiApplicationPrivate::styleOverride;
 
Q_CONSTINIT Qt::ApplicationState QGuiApplicationPrivate::applicationState = Qt::ApplicationInactive;
 
Q_CONSTINIT Qt::HighDpiScaleFactorRoundingPolicy QGuiApplicationPrivate::highDpiScaleFactorRoundingPolicy =
    Qt::HighDpiScaleFactorRoundingPolicy::PassThrough;
 
Q_CONSTINIT QPointer<QWindow> QGuiApplicationPrivate::currentDragWindow;
 
Q_CONSTINIT QList<QGuiApplicationPrivate::TabletPointData> QGuiApplicationPrivate::tabletDevicePoints; // TODO remove
 
Q_CONSTINIT QPlatformIntegration *QGuiApplicationPrivate::platform_integration = nullptr;
Q_CONSTINIT QPlatformTheme *QGuiApplicationPrivate::platform_theme = nullptr;
 
Q_CONSTINIT QList<QObject *> QGuiApplicationPrivate::generic_plugin_list;
 
enum ApplicationResourceFlags
{
    ApplicationFontExplicitlySet = 0x2
};
 
Q_CONSTINIT static unsigned applicationResourceFlags = 0;
 
Q_CONSTINIT QIcon *QGuiApplicationPrivate::app_icon = nullptr;
 
Q_CONSTINIT QString *QGuiApplicationPrivate::platform_name = nullptr;
Q_CONSTINIT QString *QGuiApplicationPrivate::displayName = nullptr;
Q_CONSTINIT QString *QGuiApplicationPrivate::desktopFileName = nullptr;
 
Q_CONSTINIT QPalette *QGuiApplicationPrivate::app_pal = nullptr;        // default application palette
 
Q_CONSTINIT Qt::MouseButton QGuiApplicationPrivate::mousePressButton = Qt::NoButton;
 
Q_CONSTINIT static int mouseDoubleClickDistance = 0;
Q_CONSTINIT static int touchDoubleTapDistance = 0;
 
Q_CONSTINIT QWindow *QGuiApplicationPrivate::currentMousePressWindow = nullptr;
 
Q_CONSTINIT static Qt::LayoutDirection layout_direction = Qt::LayoutDirectionAuto;
Q_CONSTINIT static Qt::LayoutDirection effective_layout_direction = Qt::LeftToRight;
Q_CONSTINIT static bool force_reverse = false;
 
Q_CONSTINIT QGuiApplicationPrivate *QGuiApplicationPrivate::self = nullptr;
Q_CONSTINIT int QGuiApplicationPrivate::m_fakeMouseSourcePointId = -1;
 
#ifndef QT_NO_CLIPBOARD
Q_CONSTINIT QClipboard *QGuiApplicationPrivate::qt_clipboard = nullptr;
#endif
 
Q_CONSTINIT QList<QScreen *> QGuiApplicationPrivate::screen_list;
 
Q_CONSTINIT QWindowList QGuiApplicationPrivate::window_list;
Q_CONSTINIT QWindow *QGuiApplicationPrivate::focus_window = nullptr;
 
Q_CONSTINIT static QBasicMutex applicationFontMutex;
Q_CONSTINIT QFont *QGuiApplicationPrivate::app_font = nullptr;
Q_CONSTINIT QStyleHints *QGuiApplicationPrivate::styleHints = nullptr;
Q_CONSTINIT bool QGuiApplicationPrivate::obey_desktop_settings = true;
 
Q_CONSTINIT QInputDeviceManager *QGuiApplicationPrivate::m_inputDeviceManager = nullptr;
 
Q_CONSTINIT qreal QGuiApplicationPrivate::m_maxDevicePixelRatio = 0.0;
 
Q_CONSTINIT static qreal fontSmoothingGamma = 1.7;
 
Q_CONSTINIT bool QGuiApplicationPrivate::quitOnLastWindowClosed = true;
 
extern void qRegisterGuiVariant();
#if QT_CONFIG(animation)
extern void qRegisterGuiGetInterpolator();
#endif
 
static bool qt_detectRTLLanguage()
{
    return force_reverse ^
        (QGuiApplication::tr("QT_LAYOUT_DIRECTION",
                         "Translate this string to the string 'LTR' in left-to-right"
                         " languages or to 'RTL' in right-to-left languages (such as Hebrew"
                         " and Arabic) to get proper widget layout.") == "RTL"_L1);
}
 
static void initFontUnlocked()
{
    if (!QGuiApplicationPrivate::app_font) {
        if (const QPlatformTheme *theme = QGuiApplicationPrivate::platformTheme())
            if (const QFont *font = theme->font(QPlatformTheme::SystemFont))
                QGuiApplicationPrivate::app_font = new QFont(*font);
    }
    if (!QGuiApplicationPrivate::app_font)
        QGuiApplicationPrivate::app_font =
            new QFont(QGuiApplicationPrivate::platformIntegration()->fontDatabase()->defaultFont());
}
 
static inline void clearFontUnlocked()
{
    delete QGuiApplicationPrivate::app_font;
    QGuiApplicationPrivate::app_font = nullptr;
}
 
static void initThemeHints()
{
    mouseDoubleClickDistance = QGuiApplicationPrivate::platformTheme()->themeHint(QPlatformTheme::MouseDoubleClickDistance).toInt();
    touchDoubleTapDistance = QGuiApplicationPrivate::platformTheme()->themeHint(QPlatformTheme::TouchDoubleTapDistance).toInt();
}
 
static bool checkNeedPortalSupport()
{
#if QT_CONFIG(dbus)
    return QFileInfo::exists("/.flatpak-info"_L1) || qEnvironmentVariableIsSet("SNAP");
#else
    return false;
#endif // QT_CONFIG(dbus)
}
 
// Using aggregate initialization instead of ctor so we can have a POD global static
#define Q_WINDOW_GEOMETRY_SPECIFICATION_INITIALIZER { Qt::TopLeftCorner, -1, -1, -1, -1 }
 
// Geometry specification for top level windows following the convention of the
// -geometry command line arguments in X11 (see XParseGeometry).
struct QWindowGeometrySpecification
{
    static QWindowGeometrySpecification fromArgument(const QByteArray &a);
    void applyTo(QWindow *window) const;
 
    Qt::Corner corner;
    int xOffset;
    int yOffset;
    int width;
    int height;
};
 
// Parse a token of a X11 geometry specification "200x100+10-20".
static inline int nextGeometryToken(const QByteArray &a, int &pos, char *op)
{
    *op = 0;
    const qsizetype size = a.size();
    if (pos >= size)
        return -1;
 
    *op = a.at(pos);
    if (*op == '+' || *op == '-' || *op == 'x')
        pos++;
    else if (isAsciiDigit(*op))
        *op = 'x'; // If it starts with a digit, it is supposed to be a width specification.
    else
        return -1;
 
    const int numberPos = pos;
    for ( ; pos < size && isAsciiDigit(a.at(pos)); ++pos) ;
 
    bool ok;
    const int result = a.mid(numberPos, pos - numberPos).toInt(&ok);
    return ok ? result : -1;
}
 
QWindowGeometrySpecification QWindowGeometrySpecification::fromArgument(const QByteArray &a)
{
    QWindowGeometrySpecification result = Q_WINDOW_GEOMETRY_SPECIFICATION_INITIALIZER;
    int pos = 0;
    for (int i = 0; i < 4; ++i) {
        char op;
        const int value = nextGeometryToken(a, pos, &op);
        if (value < 0)
            break;
        switch (op) {
        case 'x':
            (result.width >= 0 ? result.height : result.width) = value;
            break;
        case '+':
        case '-':
            if (result.xOffset >= 0) {
                result.yOffset = value;
                if (op == '-')
                    result.corner = result.corner == Qt::TopRightCorner ? Qt::BottomRightCorner : Qt::BottomLeftCorner;
            } else {
                result.xOffset = value;
                if (op == '-')
                    result.corner = Qt::TopRightCorner;
            }
        }
    }
    return result;
}
 
void QWindowGeometrySpecification::applyTo(QWindow *window) const
{
    QRect windowGeometry = window->frameGeometry();
    QSize size = windowGeometry.size();
    if (width >= 0 || height >= 0) {
        const QSize windowMinimumSize = window->minimumSize();
        const QSize windowMaximumSize = window->maximumSize();
        if (width >= 0)
            size.setWidth(qBound(windowMinimumSize.width(), width, windowMaximumSize.width()));
        if (height >= 0)
            size.setHeight(qBound(windowMinimumSize.height(), height, windowMaximumSize.height()));
        window->resize(size);
    }
    if (xOffset >= 0 || yOffset >= 0) {
        const QRect availableGeometry = window->screen()->virtualGeometry();
        QPoint topLeft = windowGeometry.topLeft();
        if (xOffset >= 0) {
            topLeft.setX(corner == Qt::TopLeftCorner || corner == Qt::BottomLeftCorner ?
                         xOffset :
                         qMax(availableGeometry.right() - size.width() - xOffset, availableGeometry.left()));
        }
        if (yOffset >= 0) {
            topLeft.setY(corner == Qt::TopLeftCorner || corner == Qt::TopRightCorner ?
                         yOffset :
                         qMax(availableGeometry.bottom() - size.height() - yOffset, availableGeometry.top()));
        }
        window->setFramePosition(topLeft);
    }
}
 
static QWindowGeometrySpecification windowGeometrySpecification = Q_WINDOW_GEOMETRY_SPECIFICATION_INITIALIZER;
 
#ifdef Q_QDOC
QGuiApplication::QGuiApplication(int &argc, char **argv)
#else
QGuiApplication::QGuiApplication(int &argc, char **argv, int)
#endif
    : QCoreApplication(*new QGuiApplicationPrivate(argc, argv))
{
    d_func()->init();
 
    QCoreApplicationPrivate::eventDispatcher->startingUp();
}
 
QGuiApplication::QGuiApplication(QGuiApplicationPrivate &p)
    : QCoreApplication(p)
{
}
 
QGuiApplication::~QGuiApplication()
{
    Q_D(QGuiApplication);
 
    qt_call_post_routines();
 
    d->eventDispatcher->closingDown();
    d->eventDispatcher = nullptr;
 
#ifndef QT_NO_CLIPBOARD
    delete QGuiApplicationPrivate::qt_clipboard;
    QGuiApplicationPrivate::qt_clipboard = nullptr;
#endif
 
#ifndef QT_NO_SESSIONMANAGER
    delete d->session_manager;
    d->session_manager = nullptr;
#endif //QT_NO_SESSIONMANAGER
 
    QGuiApplicationPrivate::clearPalette();
    QFontDatabase::removeAllApplicationFonts();
 
#ifndef QT_NO_CURSOR
    d->cursor_list.clear();
#endif
 
    delete QGuiApplicationPrivate::app_icon;
    QGuiApplicationPrivate::app_icon = nullptr;
    delete QGuiApplicationPrivate::platform_name;
    QGuiApplicationPrivate::platform_name = nullptr;
    delete QGuiApplicationPrivate::displayName;
    QGuiApplicationPrivate::displayName = nullptr;
    delete QGuiApplicationPrivate::m_inputDeviceManager;
    QGuiApplicationPrivate::m_inputDeviceManager = nullptr;
    delete QGuiApplicationPrivate::desktopFileName;
    QGuiApplicationPrivate::desktopFileName = nullptr;
    QGuiApplicationPrivate::mouse_buttons = Qt::NoButton;
    QGuiApplicationPrivate::modifier_buttons = Qt::NoModifier;
    QGuiApplicationPrivate::lastCursorPosition.reset();
    QGuiApplicationPrivate::currentMousePressWindow = QGuiApplicationPrivate::currentMouseWindow = nullptr;
    QGuiApplicationPrivate::applicationState = Qt::ApplicationInactive;
    QGuiApplicationPrivate::highDpiScaleFactorRoundingPolicy = Qt::HighDpiScaleFactorRoundingPolicy::PassThrough;
    QGuiApplicationPrivate::currentDragWindow = nullptr;
    QGuiApplicationPrivate::tabletDevicePoints.clear();
}
 
QGuiApplicationPrivate::QGuiApplicationPrivate(int &argc, char **argv)
    : QCoreApplicationPrivate(argc, argv),
      inputMethod(nullptr),
      lastTouchType(QEvent::TouchEnd),
      ownGlobalShareContext(false)
{
    self = this;
    application_type = QCoreApplicationPrivate::Gui;
#ifndef QT_NO_SESSIONMANAGER
    is_session_restored = false;
    is_saving_session = false;
#endif
}
 
void QGuiApplication::setApplicationDisplayName(const QString &name)
{
    if (!QGuiApplicationPrivate::displayName) {
        QGuiApplicationPrivate::displayName = new QString(name);
        if (qGuiApp) {
            disconnect(qGuiApp, &QGuiApplication::applicationNameChanged,
                    qGuiApp, &QGuiApplication::applicationDisplayNameChanged);
 
            if (*QGuiApplicationPrivate::displayName != applicationName())
                emit qGuiApp->applicationDisplayNameChanged();
        }
    } else if (name != *QGuiApplicationPrivate::displayName) {
        *QGuiApplicationPrivate::displayName = name;
        if (qGuiApp)
            emit qGuiApp->applicationDisplayNameChanged();
    }
}
 
QString QGuiApplication::applicationDisplayName()
{
    return QGuiApplicationPrivate::displayName ? *QGuiApplicationPrivate::displayName : applicationName();
}
 
void QGuiApplication::setBadgeNumber(qint64 number)
{
    QGuiApplicationPrivate::platformIntegration()->setApplicationBadge(number);
}
 
void QGuiApplication::setDesktopFileName(const QString &name)
{
    if (!QGuiApplicationPrivate::desktopFileName)
        QGuiApplicationPrivate::desktopFileName = new QString;
    *QGuiApplicationPrivate::desktopFileName = name;
    if (name.endsWith(QLatin1String(".desktop"))) { // ### Qt 7: remove
        const QString filePath = QStandardPaths::locate(QStandardPaths::ApplicationsLocation, name);
        if (!filePath.isEmpty()) {
            qWarning("QGuiApplication::setDesktopFileName: the specified desktop file name "
                     "ends with .desktop. For compatibility reasons, the .desktop suffix will "
                     "be removed. Please specify a desktop file name without .desktop suffix");
            (*QGuiApplicationPrivate::desktopFileName).chop(8);
        }
    }
}
 
QString QGuiApplication::desktopFileName()
{
    return QGuiApplicationPrivate::desktopFileName ? *QGuiApplicationPrivate::desktopFileName : QString();
}
 
QWindow *QGuiApplication::modalWindow()
{
    CHECK_QAPP_INSTANCE(nullptr)
    if (QGuiApplicationPrivate::self->modalWindowList.isEmpty())
        return nullptr;
    return QGuiApplicationPrivate::self->modalWindowList.first();
}
 
static void updateBlockedStatusRecursion(QWindow *window, bool shouldBeBlocked)
{
    QWindowPrivate *p = qt_window_private(window);
    if (p->blockedByModalWindow != shouldBeBlocked) {
        p->blockedByModalWindow = shouldBeBlocked;
        QEvent e(shouldBeBlocked ? QEvent::WindowBlocked : QEvent::WindowUnblocked);
        QGuiApplication::sendEvent(window, &e);
        for (QObject *c : window->children()) {
            if (c->isWindowType())
                updateBlockedStatusRecursion(static_cast<QWindow *>(c), shouldBeBlocked);
        }
    }
}
 
void QGuiApplicationPrivate::updateBlockedStatus(QWindow *window)
{
    bool shouldBeBlocked = false;
    const bool popupType = (window->type() == Qt::ToolTip) || (window->type() == Qt::Popup);
    if (!popupType && !self->modalWindowList.isEmpty())
        shouldBeBlocked = self->isWindowBlocked(window);
    updateBlockedStatusRecursion(window, shouldBeBlocked);
}
 
// Return whether the window needs to be notified about window blocked events.
// As opposed to QGuiApplication::topLevelWindows(), embedded windows are
// included in this list (QTBUG-18099).
static inline bool needsWindowBlockedEvent(const QWindow *w)
{
    return w->isTopLevel() && w->type() != Qt::Desktop;
}
 
void QGuiApplicationPrivate::showModalWindow(QWindow *modal)
{
    self->modalWindowList.prepend(modal);
 
    // Send leave for currently entered window if it should be blocked
    if (currentMouseWindow && !QWindowPrivate::get(currentMouseWindow)->isPopup()) {
        bool shouldBeBlocked = self->isWindowBlocked(currentMouseWindow);
        if (shouldBeBlocked) {
            // Remove the new window from modalWindowList temporarily so leave can go through
            self->modalWindowList.removeFirst();
            QEvent e(QEvent::Leave);
            QGuiApplication::sendEvent(currentMouseWindow, &e);
            currentMouseWindow = nullptr;
            self->modalWindowList.prepend(modal);
        }
    }
 
    for (QWindow *window : std::as_const(QGuiApplicationPrivate::window_list)) {
        if (needsWindowBlockedEvent(window) && !window->d_func()->blockedByModalWindow)
            updateBlockedStatus(window);
    }
 
    updateBlockedStatus(modal);
}
 
void QGuiApplicationPrivate::hideModalWindow(QWindow *window)
{
    self->modalWindowList.removeAll(window);
 
    for (QWindow *window : std::as_const(QGuiApplicationPrivate::window_list)) {
        if (needsWindowBlockedEvent(window) && window->d_func()->blockedByModalWindow)
            updateBlockedStatus(window);
    }
}
 
Qt::WindowModality QGuiApplicationPrivate::defaultModality() const
{
    return Qt::NonModal;
}
 
bool QGuiApplicationPrivate::windowNeverBlocked(QWindow *window) const
{
    Q_UNUSED(window);
    return false;
}
 
/*
    Returns \c true if \a window is blocked by a modal window. If \a
    blockingWindow is non-zero, *blockingWindow will be set to the blocking
    window (or to zero if \a window is not blocked).
*/
bool QGuiApplicationPrivate::isWindowBlocked(QWindow *window, QWindow **blockingWindow) const
{
    Q_ASSERT_X(window, Q_FUNC_INFO, "The window must not be null");
 
    QWindow *unused = nullptr;
    if (!blockingWindow)
        blockingWindow = &unused;
    *blockingWindow = nullptr;
 
    if (modalWindowList.isEmpty() || windowNeverBlocked(window))
        return false;
 
    for (int i = 0; i < modalWindowList.size(); ++i) {
        QWindow *modalWindow = modalWindowList.at(i);
 
        // A window is not blocked by another modal window if the two are
        // the same, or if the window is a child of the modal window.
        if (window == modalWindow || modalWindow->isAncestorOf(window, QWindow::IncludeTransients))
            return false;
 
        switch (modalWindow->modality() == Qt::NonModal ? defaultModality()
                                                        : modalWindow->modality()) {
        case Qt::ApplicationModal:
            *blockingWindow = modalWindow;
            return true;
        case Qt::WindowModal: {
            // Find the nearest ancestor of window which is also an ancestor of modal window to
            // determine if the modal window blocks the window.
            auto *current = window;
            do {
                if (current->isAncestorOf(modalWindow, QWindow::IncludeTransients)) {
                    *blockingWindow = modalWindow;
                    return true;
                }
                current = current->parent(QWindow::IncludeTransients);
            } while (current);
            break;
        }
        default:
            Q_ASSERT_X(false, "QGuiApplication", "internal error, a modal widget cannot be modeless");
            break;
        }
    }
    return false;
}
 
QWindow *QGuiApplication::focusWindow()
{
    return QGuiApplicationPrivate::focus_window;
}
 
QObject *QGuiApplication::focusObject()
{
    if (focusWindow())
        return focusWindow()->focusObject();
    return nullptr;
}
 
QWindowList QGuiApplication::allWindows()
{
    return QGuiApplicationPrivate::window_list;
}
 
QWindowList QGuiApplication::topLevelWindows()
{
    const QWindowList &list = QGuiApplicationPrivate::window_list;
    QWindowList topLevelWindows;
    for (int i = 0; i < list.size(); ++i) {
        QWindow *window = list.at(i);
        if (!window->isTopLevel())
            continue;
 
        // Desktop windows are special, as each individual desktop window
        // will report that it's a top level window, but we don't want to
        // include them in the application wide list of top level windows.
        if (window->type() == Qt::Desktop)
            continue;
 
        // Windows embedded in native windows do not have QWindow parents,
        // but they are not true top level windows, so do not include them.
        if (window->handle() && window->handle()->isEmbedded())
            continue;
 
        topLevelWindows.prepend(window);
    }
 
    return topLevelWindows;
}
 
QScreen *QGuiApplication::primaryScreen()
{
    if (QGuiApplicationPrivate::screen_list.isEmpty())
        return nullptr;
    return QGuiApplicationPrivate::screen_list.at(0);
}
 
QList<QScreen *> QGuiApplication::screens()
{
    return QGuiApplicationPrivate::screen_list;
}
 
QScreen *QGuiApplication::screenAt(const QPoint &point)
{
    QVarLengthArray<const QScreen *, 8> visitedScreens;
    for (const QScreen *screen : QGuiApplication::screens()) {
        if (visitedScreens.contains(screen))
            continue;
 
        // The virtual siblings include the screen itself, so iterate directly
        for (QScreen *sibling : screen->virtualSiblings()) {
            if (sibling->geometry().contains(point))
                return sibling;
 
            visitedScreens.append(sibling);
        }
    }
 
    return nullptr;
}
 
qreal QGuiApplication::devicePixelRatio() const
{
    if (!qFuzzyIsNull(QGuiApplicationPrivate::m_maxDevicePixelRatio))
        return QGuiApplicationPrivate::m_maxDevicePixelRatio;
 
    QGuiApplicationPrivate::m_maxDevicePixelRatio = 1.0; // make sure we never return 0.
    for (QScreen *screen : std::as_const(QGuiApplicationPrivate::screen_list))
        QGuiApplicationPrivate::m_maxDevicePixelRatio = qMax(QGuiApplicationPrivate::m_maxDevicePixelRatio, screen->devicePixelRatio());
 
    return QGuiApplicationPrivate::m_maxDevicePixelRatio;
}
 
void QGuiApplicationPrivate::resetCachedDevicePixelRatio()
{
    m_maxDevicePixelRatio = 0.0;
}
 
QWindow *QGuiApplication::topLevelAt(const QPoint &pos)
{
    if (QScreen *windowScreen = screenAt(pos)) {
        const QPoint devicePosition = QHighDpi::toNativePixels(pos, windowScreen);
        return windowScreen->handle()->topLevelAt(devicePosition);
    }
    return nullptr;
}
 
QString QGuiApplication::platformName()
{
    return QGuiApplicationPrivate::platform_name ?
           *QGuiApplicationPrivate::platform_name : QString();
}
 
Q_LOGGING_CATEGORY(lcQpaPluginLoading, "qt.qpa.plugin");
Q_LOGGING_CATEGORY(lcQpaTheme, "qt.qpa.theme");
Q_LOGGING_CATEGORY(lcPtrDispatch, "qt.pointer.dispatch");
 
static void init_platform(const QString &pluginNamesWithArguments, const QString &platformPluginPath, const QString &platformThemeName, int &argc, char **argv)
{
    qCDebug(lcQpaPluginLoading) << "init_platform called with"
        << "pluginNamesWithArguments" << pluginNamesWithArguments
        << "platformPluginPath" << platformPluginPath
        << "platformThemeName" << platformThemeName;
 
    QStringList plugins = pluginNamesWithArguments.split(u';', Qt::SkipEmptyParts);
    QStringList platformArguments;
    QStringList availablePlugins = QPlatformIntegrationFactory::keys(platformPluginPath);
    for (const auto &pluginArgument : plugins) {
        // Split into platform name and arguments
        QStringList arguments = pluginArgument.split(u':', Qt::SkipEmptyParts);
        if (arguments.isEmpty())
            continue;
        const QString name = arguments.takeFirst().toLower();
        QString argumentsKey = name;
        if (name.isEmpty())
            continue;
        argumentsKey[0] = argumentsKey.at(0).toUpper();
        arguments.append(QLibraryInfo::platformPluginArguments(argumentsKey));
 
        qCDebug(lcQpaPluginLoading) << "Attempting to load Qt platform plugin" << name << "with arguments" << arguments;
 
        // Create the platform integration.
        QGuiApplicationPrivate::platform_integration = QPlatformIntegrationFactory::create(name, arguments, argc, argv, platformPluginPath);
        if (Q_UNLIKELY(!QGuiApplicationPrivate::platform_integration)) {
            if (availablePlugins.contains(name)) {
                qCInfo(lcQpaPluginLoading).nospace().noquote()
                        << "Could not load the Qt platform plugin \"" << name << "\" in \""
                        << QDir::toNativeSeparators(platformPluginPath) << "\" even though it was found.";
            } else {
                qCWarning(lcQpaPluginLoading).nospace().noquote()
                        << "Could not find the Qt platform plugin \"" << name << "\" in \""
                        << QDir::toNativeSeparators(platformPluginPath) << "\"";
            }
        } else {
            qCDebug(lcQpaPluginLoading) << "Successfully loaded Qt platform plugin" << name;
            QGuiApplicationPrivate::platform_name = new QString(name);
            platformArguments = arguments;
            break;
        }
    }
 
    if (Q_UNLIKELY(!QGuiApplicationPrivate::platform_integration)) {
        QString fatalMessage = QStringLiteral("This application failed to start because no Qt platform plugin could be initialized. "
                                              "Reinstalling the application may fix this problem.\n");
 
        if (!availablePlugins.isEmpty())
            fatalMessage += "\nAvailable platform plugins are: %1.\n"_L1.arg(availablePlugins.join(", "_L1));
 
#if defined(Q_OS_WIN)
        // Windows: Display message box unless it is a console application
        // or debug build showing an assert box.
        if (!QLibraryInfo::isDebugBuild() && !GetConsoleWindow())
            MessageBox(0, (LPCTSTR)fatalMessage.utf16(), (LPCTSTR)(QCoreApplication::applicationName().utf16()), MB_OK | MB_ICONERROR);
#endif // Q_OS_WIN
        qFatal("%s", qPrintable(fatalMessage));
 
        return;
    }
 
    // Create the platform theme:
 
    // 1) Fetch the platform name from the environment if present.
    QStringList themeNames;
    if (!platformThemeName.isEmpty()) {
        qCDebug(lcQpaTheme) << "Adding" << platformThemeName << "from environment to list of theme names";
        themeNames.append(platformThemeName);
    }
 
    // 2) Special case - check whether it's a flatpak or snap app to use xdg-desktop-portal platform theme for portals support
    if (checkNeedPortalSupport()) {
        qCDebug(lcQpaTheme) << "Adding xdgdesktopportal to list of theme names";
        themeNames.append(QStringLiteral("xdgdesktopportal"));
    }
 
    // 3) Ask the platform integration for a list of theme names
    const auto platformIntegrationThemeNames = QGuiApplicationPrivate::platform_integration->themeNames();
    qCDebug(lcQpaTheme) << "Adding platform integration's theme names to list of theme names:" << platformIntegrationThemeNames;
    themeNames += platformIntegrationThemeNames;
    // 4) Look for a theme plugin.
    for (const QString &themeName : std::as_const(themeNames)) {
        qCDebug(lcQpaTheme) << "Attempting to create platform theme" << themeName << "via QPlatformThemeFactory::create";
        QGuiApplicationPrivate::platform_theme = QPlatformThemeFactory::create(themeName, platformPluginPath);
        if (QGuiApplicationPrivate::platform_theme) {
            qCDebug(lcQpaTheme) << "Successfully created platform theme" << themeName;
            break;
        }
    }
 
    // 5) If no theme plugin was found ask the platform integration to
    // create a theme
    if (!QGuiApplicationPrivate::platform_theme) {
        for (const QString &themeName : std::as_const(themeNames)) {
            qCDebug(lcQpaTheme) << "Attempting to create platform theme" << themeName << "via createPlatformTheme";
            QGuiApplicationPrivate::platform_theme = QGuiApplicationPrivate::platform_integration->createPlatformTheme(themeName);
            if (QGuiApplicationPrivate::platform_theme) {
                qCDebug(lcQpaTheme) << "Successfully created platform theme" << themeName;
                break;
            }
        }
        // No error message; not having a theme plugin is allowed.
    }
 
    // 6) Fall back on the built-in "null" platform theme.
    if (!QGuiApplicationPrivate::platform_theme) {
        qCDebug(lcQpaTheme) << "Failed to create platform theme; using \"null\" platform theme";
        QGuiApplicationPrivate::platform_theme = new QPlatformTheme;
    }
 
    // Set arguments as dynamic properties on the native interface as
    // boolean 'foo' or strings: 'foo=bar'
    if (!platformArguments.isEmpty()) {
        if (QObject *nativeInterface = QGuiApplicationPrivate::platform_integration->nativeInterface()) {
            for (const QString &argument : std::as_const(platformArguments)) {
                const qsizetype equalsPos = argument.indexOf(u'=');
                const QByteArray name =
                    equalsPos != -1 ? argument.left(equalsPos).toUtf8() : argument.toUtf8();
                const QVariant value =
                    equalsPos != -1 ? QVariant(argument.mid(equalsPos + 1)) : QVariant(true);
                nativeInterface->setProperty(name.constData(), value);
            }
        }
    }
 
    const auto platformIntegration = QGuiApplicationPrivate::platformIntegration();
    fontSmoothingGamma = platformIntegration->styleHint(QPlatformIntegration::FontSmoothingGamma).toReal();
    QCoreApplication::setAttribute(Qt::AA_DontShowShortcutsInContextMenus,
        !QGuiApplication::styleHints()->showShortcutsInContextMenus());
}
 
static void init_plugins(const QList<QByteArray> &pluginList)
{
    for (int i = 0; i < pluginList.size(); ++i) {
        QByteArray pluginSpec = pluginList.at(i);
        qsizetype colonPos = pluginSpec.indexOf(':');
        QObject *plugin;
        if (colonPos < 0)
            plugin = QGenericPluginFactory::create(QLatin1StringView(pluginSpec), QString());
        else
            plugin = QGenericPluginFactory::create(QLatin1StringView(pluginSpec.mid(0, colonPos)),
                                                   QLatin1StringView(pluginSpec.mid(colonPos+1)));
        if (plugin)
            QGuiApplicationPrivate::generic_plugin_list.append(plugin);
        else
            qWarning("No such plugin for spec \"%s\"", pluginSpec.constData());
    }
}
 
#if QT_CONFIG(commandlineparser)
void QGuiApplicationPrivate::addQtOptions(QList<QCommandLineOption> *options)
{
    QCoreApplicationPrivate::addQtOptions(options);
 
#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN)
    const QByteArray sessionType = qgetenv("XDG_SESSION_TYPE");
    const bool x11 = sessionType == "x11";
    // Technically the x11 aliases are only available if platformName is "xcb", but we can't know that here.
#else
    const bool x11 = false;
#endif
 
    options->append(QCommandLineOption(QStringLiteral("platform"),
                    QGuiApplication::tr("QPA plugin. See QGuiApplication documentation for available options for each plugin."), QStringLiteral("platformName[:options]")));
    options->append(QCommandLineOption(QStringLiteral("platformpluginpath"),
                    QGuiApplication::tr("Path to the platform plugins."), QStringLiteral("path")));
    options->append(QCommandLineOption(QStringLiteral("platformtheme"),
                    QGuiApplication::tr("Platform theme."), QStringLiteral("theme")));
    options->append(QCommandLineOption(QStringLiteral("plugin"),
                    QGuiApplication::tr("Additional plugins to load, can be specified multiple times."), QStringLiteral("plugin")));
    options->append(QCommandLineOption(QStringLiteral("qwindowgeometry"),
                    QGuiApplication::tr("Window geometry for the main window, using the X11-syntax, like 100x100+50+50."), QStringLiteral("geometry")));
    options->append(QCommandLineOption(QStringLiteral("qwindowicon"),
                    QGuiApplication::tr("Default window icon."), QStringLiteral("icon")));
    options->append(QCommandLineOption(QStringLiteral("qwindowtitle"),
                    QGuiApplication::tr("Title of the first window."), QStringLiteral("title")));
    options->append(QCommandLineOption(QStringLiteral("reverse"),
                    QGuiApplication::tr("Sets the application's layout direction to Qt::RightToLeft (debugging helper).")));
    options->append(QCommandLineOption(QStringLiteral("session"),
                    QGuiApplication::tr("Restores the application from an earlier session."), QStringLiteral("session")));
 
    if (x11) {
         options->append(QCommandLineOption(QStringLiteral("display"),
                         QGuiApplication::tr("Display name, overrides $DISPLAY."), QStringLiteral("display")));
         options->append(QCommandLineOption(QStringLiteral("name"),
                         QGuiApplication::tr("Instance name according to ICCCM 4.1.2.5."), QStringLiteral("name")));
         options->append(QCommandLineOption(QStringLiteral("nograb"),
                         QGuiApplication::tr("Disable mouse grabbing (useful in debuggers).")));
         options->append(QCommandLineOption(QStringLiteral("dograb"),
                         QGuiApplication::tr("Force mouse grabbing (even when running in a debugger).")));
         options->append(QCommandLineOption(QStringLiteral("visual"),
                         QGuiApplication::tr("ID of the X11 Visual to use."), QStringLiteral("id")));
         // Not using the "QStringList names" solution for those aliases, because it makes the first column too wide
         options->append(QCommandLineOption(QStringLiteral("geometry"),
                         QGuiApplication::tr("Alias for --qwindowgeometry."), QStringLiteral("geometry")));
         options->append(QCommandLineOption(QStringLiteral("icon"),
                         QGuiApplication::tr("Alias for --qwindowicon."), QStringLiteral("icon")));
         options->append(QCommandLineOption(QStringLiteral("title"),
                         QGuiApplication::tr("Alias for --qwindowtitle."), QStringLiteral("title")));
    }
}
#endif // QT_CONFIG(commandlineparser)
 
void QGuiApplicationPrivate::createPlatformIntegration()
{
    QHighDpiScaling::initHighDpiScaling();
 
    // Load the platform integration
    QString platformPluginPath = QString::fromLocal8Bit(qgetenv("QT_QPA_PLATFORM_PLUGIN_PATH"));
 
 
    QByteArray platformName;
#ifdef QT_QPA_DEFAULT_PLATFORM_NAME
    platformName = QT_QPA_DEFAULT_PLATFORM_NAME;
#endif
#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN)
    QList<QByteArray> platformArguments = platformName.split(':');
    QByteArray platformPluginBase = platformArguments.first();
 
    const bool hasWaylandDisplay = qEnvironmentVariableIsSet("WAYLAND_DISPLAY");
    const bool isWaylandSessionType = qgetenv("XDG_SESSION_TYPE") == "wayland";
 
    QVector<QByteArray> preferredPlatformOrder;
    const bool defaultIsXcb = platformPluginBase == "xcb";
    const QByteArray xcbPlatformName = defaultIsXcb ? platformName : "xcb";
    if (qEnvironmentVariableIsSet("DISPLAY")) {
        preferredPlatformOrder << xcbPlatformName;
        if (defaultIsXcb)
            platformName.clear();
    }
 
    const bool defaultIsWayland = !defaultIsXcb && platformPluginBase.startsWith("wayland");
    const QByteArray waylandPlatformName = defaultIsWayland ? platformName : "wayland";
    if (hasWaylandDisplay || isWaylandSessionType) {
        preferredPlatformOrder.prepend(waylandPlatformName);
 
        if (defaultIsWayland)
            platformName.clear();
    }
 
    if (!platformName.isEmpty())
        preferredPlatformOrder.append(platformName);
 
    platformName = preferredPlatformOrder.join(';');
#endif
 
    bool platformExplicitlySelected = false;
    QByteArray platformNameEnv = qgetenv("QT_QPA_PLATFORM");
    if (!platformNameEnv.isEmpty()) {
        platformName = platformNameEnv;
        platformExplicitlySelected = true;
    }
 
    QString platformThemeName = QString::fromLocal8Bit(qgetenv("QT_QPA_PLATFORMTHEME"));
 
    // Get command line params
 
    QString icon;
 
    int j = argc ? 1 : 0;
    for (int i=1; i<argc; i++) {
        if (!argv[i])
            continue;
        if (*argv[i] != '-') {
            argv[j++] = argv[i];
            continue;
        }
        const bool xcbIsDefault = platformName.startsWith("xcb");
        const char *arg = argv[i];
        if (arg[1] == '-') // startsWith("--")
            ++arg;
        if (strcmp(arg, "-platformpluginpath") == 0) {
            if (++i < argc)
                platformPluginPath = QFile::decodeName(argv[i]);
        } else if (strcmp(arg, "-platform") == 0) {
            if (++i < argc) {
                platformExplicitlySelected = true;
                platformName = argv[i];
            }
        } else if (strcmp(arg, "-platformtheme") == 0) {
            if (++i < argc)
                platformThemeName = QString::fromLocal8Bit(argv[i]);
        } else if (strcmp(arg, "-qwindowgeometry") == 0 || (xcbIsDefault && strcmp(arg, "-geometry") == 0)) {
            if (++i < argc)
                windowGeometrySpecification = QWindowGeometrySpecification::fromArgument(argv[i]);
        } else if (strcmp(arg, "-qwindowtitle") == 0 || (xcbIsDefault && strcmp(arg, "-title") == 0)) {
            if (++i < argc)
                firstWindowTitle = QString::fromLocal8Bit(argv[i]);
        } else if (strcmp(arg, "-qwindowicon") == 0 || (xcbIsDefault && strcmp(arg, "-icon") == 0)) {
            if (++i < argc) {
                icon = QFile::decodeName(argv[i]);
            }
        } else {
            argv[j++] = argv[i];
        }
    }
 
    if (j < argc) {
        argv[j] = nullptr;
        argc = j;
    }
 
    Q_UNUSED(platformExplicitlySelected);
 
    init_platform(QLatin1StringView(platformName), platformPluginPath, platformThemeName, argc, argv);
    if (const QPlatformTheme *theme = platformTheme())
        QStyleHintsPrivate::get(QGuiApplication::styleHints())->setColorScheme(theme->colorScheme());
 
    if (!icon.isEmpty())
        forcedWindowIcon = QDir::isAbsolutePath(icon) ? QIcon(icon) : QIcon::fromTheme(icon);
}
 
void QGuiApplicationPrivate::createEventDispatcher()
{
    Q_ASSERT(!eventDispatcher);
 
    if (platform_integration == nullptr)
        createPlatformIntegration();
 
    // The platform integration should not result in creating an event dispatcher
    Q_ASSERT_X(!threadData.loadRelaxed()->eventDispatcher, "QGuiApplication",
        "Creating the platform integration resulted in creating an event dispatcher");
 
    // Nor should it mess with the QCoreApplication's event dispatcher
    Q_ASSERT(!eventDispatcher);
 
    eventDispatcher = platform_integration->createEventDispatcher();
}
 
void QGuiApplicationPrivate::eventDispatcherReady()
{
    if (platform_integration == nullptr)
        createPlatformIntegration();
 
    platform_integration->initialize();
}
 
void Q_TRACE_INSTRUMENT(qtgui) QGuiApplicationPrivate::init()
{
    Q_TRACE_SCOPE(QGuiApplicationPrivate_init);
 
#if defined(Q_OS_MACOS)
    QMacAutoReleasePool pool;
#endif
 
    QCoreApplicationPrivate::init();
 
    QCoreApplicationPrivate::is_app_running = false; // Starting up.
 
    bool loadTestability = false;
    QList<QByteArray> pluginList;
    // Get command line params
#ifndef QT_NO_SESSIONMANAGER
    QString session_id;
    QString session_key;
# if defined(Q_OS_WIN)
    wchar_t guidstr[40];
    GUID guid;
    CoCreateGuid(&guid);
    StringFromGUID2(guid, guidstr, 40);
    session_id = QString::fromWCharArray(guidstr);
    CoCreateGuid(&guid);
    StringFromGUID2(guid, guidstr, 40);
    session_key = QString::fromWCharArray(guidstr);
# endif
#endif
    QString s;
    int j = argc ? 1 : 0;
    for (int i=1; i<argc; i++) {
        if (!argv[i])
            continue;
        if (*argv[i] != '-') {
            argv[j++] = argv[i];
            continue;
        }
        const char *arg = argv[i];
        if (arg[1] == '-') // startsWith("--")
            ++arg;
        if (strcmp(arg, "-plugin") == 0) {
            if (++i < argc)
                pluginList << argv[i];
        } else if (strcmp(arg, "-reverse") == 0) {
            force_reverse = true;
#ifdef Q_OS_MAC
        } else if (strncmp(arg, "-psn_", 5) == 0) {
            // eat "-psn_xxxx" on Mac, which is passed when starting an app from Finder.
            // special hack to change working directory (for an app bundle) when running from finder
            if (QDir::currentPath() == "/"_L1) {
                QCFType<CFURLRef> bundleURL(CFBundleCopyBundleURL(CFBundleGetMainBundle()));
                QString qbundlePath = QCFString(CFURLCopyFileSystemPath(bundleURL,
                                                                        kCFURLPOSIXPathStyle));
                if (qbundlePath.endsWith(".app"_L1))
                    QDir::setCurrent(qbundlePath.section(u'/', 0, -2));
            }
#endif
#ifndef QT_NO_SESSIONMANAGER
        } else if (strcmp(arg, "-session") == 0 && i < argc - 1) {
            ++i;
            if (argv[i] && *argv[i]) {
                session_id = QString::fromLatin1(argv[i]);
                qsizetype p = session_id.indexOf(u'_');
                if (p >= 0) {
                    session_key = session_id.mid(p +1);
                    session_id = session_id.left(p);
                }
                is_session_restored = true;
            }
#endif
        } else if (strcmp(arg, "-testability") == 0) {
            loadTestability = true;
        } else if (strncmp(arg, "-style=", 7) == 0) {
            s = QString::fromLocal8Bit(arg + 7);
        } else if (strcmp(arg, "-style") == 0 && i < argc - 1) {
            s = QString::fromLocal8Bit(argv[++i]);
        } else {
            argv[j++] = argv[i];
        }
 
        if (!s.isEmpty())
            styleOverride = s;
    }
 
    if (j < argc) {
        argv[j] = nullptr;
        argc = j;
    }
 
    // Load environment exported generic plugins
    QByteArray envPlugins = qgetenv("QT_QPA_GENERIC_PLUGINS");
    if (!envPlugins.isEmpty())
        pluginList += envPlugins.split(',');
 
    if (platform_integration == nullptr)
        createPlatformIntegration();
 
    updatePalette();
    QFont::initialize();
    initThemeHints();
 
#ifndef QT_NO_CURSOR
    QCursorData::initialize();
#endif
 
    // trigger registering of QVariant's GUI types
    qRegisterGuiVariant();
 
#if QT_CONFIG(animation)
    // trigger registering of animation interpolators
    qRegisterGuiGetInterpolator();
#endif
 
    // set a global share context when enabled unless there is already one
#ifndef QT_NO_OPENGL
    if (qApp->testAttribute(Qt::AA_ShareOpenGLContexts) && !qt_gl_global_share_context()) {
        QOpenGLContext *ctx = new QOpenGLContext;
        ctx->setFormat(QSurfaceFormat::defaultFormat());
        ctx->create();
        qt_gl_set_global_share_context(ctx);
        ownGlobalShareContext = true;
    }
#endif
 
    QWindowSystemInterfacePrivate::eventTime.start();
 
    is_app_running = true;
    init_plugins(pluginList);
    QWindowSystemInterface::flushWindowSystemEvents();
 
    Q_Q(QGuiApplication);
#ifndef QT_NO_SESSIONMANAGER
    // connect to the session manager
    session_manager = new QSessionManager(q, session_id, session_key);
#endif
 
#if QT_CONFIG(library)
    if (qEnvironmentVariableIntValue("QT_LOAD_TESTABILITY") > 0)
        loadTestability = true;
 
    if (loadTestability) {
        QLibrary testLib(QStringLiteral("qttestability"));
        if (Q_UNLIKELY(!testLib.load())) {
            qCritical() << "Library qttestability load failed:" << testLib.errorString();
        } else {
            typedef void (*TasInitialize)(void);
            TasInitialize initFunction = (TasInitialize)testLib.resolve("qt_testability_init");
            if (Q_UNLIKELY(!initFunction)) {
                qCritical("Library qttestability resolve failed!");
            } else {
                initFunction();
            }
        }
    }
#else
    Q_UNUSED(loadTestability);
#endif // QT_CONFIG(library)
 
    // trigger changed signal and event delivery
    QGuiApplication::setLayoutDirection(layout_direction);
 
    if (!QGuiApplicationPrivate::displayName)
        QObject::connect(q, &QGuiApplication::applicationNameChanged,
                         q, &QGuiApplication::applicationDisplayNameChanged);
}
 
extern void qt_cleanupFontDatabase();
 
QGuiApplicationPrivate::~QGuiApplicationPrivate()
{
    is_app_closing = true;
    is_app_running = false;
 
    for (int i = 0; i < generic_plugin_list.size(); ++i)
        delete generic_plugin_list.at(i);
    generic_plugin_list.clear();
 
    clearFontUnlocked();
 
    QFont::cleanup();
 
#ifndef QT_NO_CURSOR
    QCursorData::cleanup();
#endif
 
    layout_direction = Qt::LayoutDirectionAuto;
 
    cleanupThreadData();
 
    delete QGuiApplicationPrivate::styleHints;
    QGuiApplicationPrivate::styleHints = nullptr;
    delete inputMethod;
 
    qt_cleanupFontDatabase();
 
    QPixmapCache::clear();
 
#ifndef QT_NO_OPENGL
    if (ownGlobalShareContext) {
        delete qt_gl_global_share_context();
        qt_gl_set_global_share_context(nullptr);
    }
#endif
 
#if QT_CONFIG(vulkan)
    QVulkanDefaultInstance::cleanup();
#endif
 
    platform_integration->destroy();
 
    delete platform_theme;
    platform_theme = nullptr;
    delete platform_integration;
    platform_integration = nullptr;
 
    window_list.clear();
    screen_list.clear();
 
    self = nullptr;
}
 
#if 0
#ifndef QT_NO_CURSOR
QCursor *overrideCursor();
void setOverrideCursor(const QCursor &);
void changeOverrideCursor(const QCursor &);
void restoreOverrideCursor();
#endif
 
static QFont font();
static QFont font(const QWidget*);
static QFont font(const char *className);
static void setFont(const QFont &, const char *className = nullptr);
static QFontMetrics fontMetrics();
 
#ifndef QT_NO_CLIPBOARD
static QClipboard *clipboard();
#endif
#endif
 
Qt::KeyboardModifiers QGuiApplication::keyboardModifiers()
{
    return QGuiApplicationPrivate::modifier_buttons;
}
 
Qt::KeyboardModifiers QGuiApplication::queryKeyboardModifiers()
{
    CHECK_QAPP_INSTANCE(Qt::KeyboardModifiers{})
    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
    return pi->queryKeyboardModifiers();
}
 
Qt::MouseButtons QGuiApplication::mouseButtons()
{
    return QGuiApplicationPrivate::mouse_buttons;
}
 
QPlatformNativeInterface *QGuiApplication::platformNativeInterface()
{
    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
    return pi ? pi->nativeInterface() : nullptr;
}
 
QFunctionPointer QGuiApplication::platformFunction(const QByteArray &function)
{
    QPlatformIntegration *pi = QGuiApplicationPrivate::platformIntegration();
    if (!pi) {
        qWarning("QGuiApplication::platformFunction(): Must construct a QGuiApplication before accessing a platform function");
        return nullptr;
    }
 
    return pi->nativeInterface() ? pi->nativeInterface()->platformFunction(function) : nullptr;
}
 
int QGuiApplication::exec()
{
#if QT_CONFIG(accessibility)
    QAccessible::setRootObject(qApp);
#endif
    return QCoreApplication::exec();
}
 
void QGuiApplicationPrivate::captureGlobalModifierState(QEvent *e)
{
    if (e->spontaneous()) {
        // Capture the current mouse and keyboard states. Doing so here is
        // required in order to support Qt Test synthesized events. Real mouse
        // and keyboard state updates from the platform plugin are managed by
        // QGuiApplicationPrivate::process(Mouse|Wheel|Key|Touch|Tablet)Event();
        // ### FIXME: Qt Test should not call qapp->notify(), but rather route
        // the events through the proper QPA interface. This is required to
        // properly generate all other events such as enter/leave etc.
        switch (e->type()) {
        case QEvent::MouseButtonPress: {
            QMouseEvent *me = static_cast<QMouseEvent *>(e);
            QGuiApplicationPrivate::modifier_buttons = me->modifiers();
            QGuiApplicationPrivate::mouse_buttons |= me->button();
            break;
        }
        case QEvent::MouseButtonDblClick: {
            QMouseEvent *me = static_cast<QMouseEvent *>(e);
            QGuiApplicationPrivate::modifier_buttons = me->modifiers();
            QGuiApplicationPrivate::mouse_buttons |= me->button();
            break;
        }
        case QEvent::MouseButtonRelease: {
            QMouseEvent *me = static_cast<QMouseEvent *>(e);
            QGuiApplicationPrivate::modifier_buttons = me->modifiers();
            QGuiApplicationPrivate::mouse_buttons &= ~me->button();
            break;
        }
        case QEvent::KeyPress:
        case QEvent::KeyRelease:
        case QEvent::MouseMove:
#if QT_CONFIG(wheelevent)
        case QEvent::Wheel:
#endif
        case QEvent::TouchBegin:
        case QEvent::TouchUpdate:
        case QEvent::TouchEnd:
#if QT_CONFIG(tabletevent)
        case QEvent::TabletMove:
        case QEvent::TabletPress:
        case QEvent::TabletRelease:
#endif
        {
            QInputEvent *ie = static_cast<QInputEvent *>(e);
            QGuiApplicationPrivate::modifier_buttons = ie->modifiers();
            break;
        }
        default:
            break;
        }
    }
}
 
bool QGuiApplication::notify(QObject *object, QEvent *event)
{
    if (object->isWindowType()) {
        if (QGuiApplicationPrivate::sendQWindowEventToQPlatformWindow(static_cast<QWindow *>(object), event))
            return true; // Platform plugin ate the event
    }
 
    QGuiApplicationPrivate::captureGlobalModifierState(event);
 
    return QCoreApplication::notify(object, event);
}
 
bool QGuiApplication::event(QEvent *e)
{
    if (e->type() == QEvent::LanguageChange) {
        // if the layout direction was set explicitly, then don't override it here
        if (layout_direction == Qt::LayoutDirectionAuto)
            setLayoutDirection(layout_direction);
        for (auto *topLevelWindow : QGuiApplication::topLevelWindows()) {
            if (topLevelWindow->flags() != Qt::Desktop)
                postEvent(topLevelWindow, new QEvent(QEvent::LanguageChange));
        }
    } else if (e->type() == QEvent::ApplicationFontChange ||
               e->type() == QEvent::ApplicationPaletteChange) {
        for (auto *topLevelWindow : QGuiApplication::topLevelWindows()) {
            if (topLevelWindow->flags() != Qt::Desktop)
                postEvent(topLevelWindow, new QEvent(e->type()));
        }
    } else if (e->type() == QEvent::Quit) {
        // Close open windows. This is done in order to deliver de-expose
        // events while the event loop is still running.
        for (QWindow *topLevelWindow : QGuiApplication::topLevelWindows()) {
            // Already closed windows will not have a platform window, skip those
            if (!topLevelWindow->handle())
                continue;
            if (!topLevelWindow->close()) {
                e->ignore();
                return true;
            }
        }
    }
 
    return QCoreApplication::event(e);
}
 
bool QGuiApplication::compressEvent(QEvent *event, QObject *receiver, QPostEventList *postedEvents)
{
    return QCoreApplication::compressEvent(event, receiver, postedEvents);
}
 
bool QGuiApplicationPrivate::sendQWindowEventToQPlatformWindow(QWindow *window, QEvent *event)
{
    if (!window)
        return false;
    QPlatformWindow *platformWindow = window->handle();
    if (!platformWindow)
        return false;
    // spontaneous events come from the platform integration already, we don't need to send the events back
    if (event->spontaneous())
        return false;
    // let the platform window do any handling it needs to as well
    return platformWindow->windowEvent(event);
}
 
bool QGuiApplicationPrivate::processNativeEvent(QWindow *window, const QByteArray &eventType, void *message, qintptr *result)
{
    return window->nativeEvent(eventType, message, result);
}
 
void Q_TRACE_INSTRUMENT(qtgui) QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent *e)
{
    Q_TRACE_PARAM_REPLACE(QWindowSystemInterfacePrivate::WindowSystemEvent *, int);
    Q_TRACE_SCOPE(QGuiApplicationPrivate_processWindowSystemEvent, e->type);
 
    switch(e->type) {
    case QWindowSystemInterfacePrivate::Mouse:
        QGuiApplicationPrivate::processMouseEvent(static_cast<QWindowSystemInterfacePrivate::MouseEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Wheel:
        QGuiApplicationPrivate::processWheelEvent(static_cast<QWindowSystemInterfacePrivate::WheelEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Key:
        QGuiApplicationPrivate::processKeyEvent(static_cast<QWindowSystemInterfacePrivate::KeyEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Touch:
        QGuiApplicationPrivate::processTouchEvent(static_cast<QWindowSystemInterfacePrivate::TouchEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::GeometryChange:
        QGuiApplicationPrivate::processGeometryChangeEvent(static_cast<QWindowSystemInterfacePrivate::GeometryChangeEvent*>(e));
        break;
    case QWindowSystemInterfacePrivate::Enter:
        QGuiApplicationPrivate::processEnterEvent(static_cast<QWindowSystemInterfacePrivate::EnterEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Leave:
        QGuiApplicationPrivate::processLeaveEvent(static_cast<QWindowSystemInterfacePrivate::LeaveEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ActivatedWindow:
        QGuiApplicationPrivate::processActivatedEvent(static_cast<QWindowSystemInterfacePrivate::ActivatedWindowEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::WindowStateChanged:
        QGuiApplicationPrivate::processWindowStateChangedEvent(static_cast<QWindowSystemInterfacePrivate::WindowStateChangedEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::WindowScreenChanged:
        QGuiApplicationPrivate::processWindowScreenChangedEvent(static_cast<QWindowSystemInterfacePrivate::WindowScreenChangedEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::WindowDevicePixelRatioChanged:
        QGuiApplicationPrivate::processWindowDevicePixelRatioChangedEvent(static_cast<QWindowSystemInterfacePrivate::WindowDevicePixelRatioChangedEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::SafeAreaMarginsChanged:
        QGuiApplicationPrivate::processSafeAreaMarginsChangedEvent(static_cast<QWindowSystemInterfacePrivate::SafeAreaMarginsChangedEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ApplicationStateChanged: {
        QWindowSystemInterfacePrivate::ApplicationStateChangedEvent * changeEvent = static_cast<QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *>(e);
        QGuiApplicationPrivate::setApplicationState(changeEvent->newState, changeEvent->forcePropagate); }
        break;
    case QWindowSystemInterfacePrivate::ApplicationTermination:
        QGuiApplicationPrivate::processApplicationTermination(e);
        break;
    case QWindowSystemInterfacePrivate::FlushEvents: {
        QWindowSystemInterfacePrivate::FlushEventsEvent *flushEventsEvent = static_cast<QWindowSystemInterfacePrivate::FlushEventsEvent *>(e);
        QWindowSystemInterface::deferredFlushWindowSystemEvents(flushEventsEvent->flags); }
        break;
    case QWindowSystemInterfacePrivate::Close:
        QGuiApplicationPrivate::processCloseEvent(
                static_cast<QWindowSystemInterfacePrivate::CloseEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ScreenOrientation:
        QGuiApplicationPrivate::processScreenOrientationChange(
                static_cast<QWindowSystemInterfacePrivate::ScreenOrientationEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ScreenGeometry:
        QGuiApplicationPrivate::processScreenGeometryChange(
                static_cast<QWindowSystemInterfacePrivate::ScreenGeometryEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ScreenLogicalDotsPerInch:
        QGuiApplicationPrivate::processScreenLogicalDotsPerInchChange(
                static_cast<QWindowSystemInterfacePrivate::ScreenLogicalDotsPerInchEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ScreenRefreshRate:
        QGuiApplicationPrivate::processScreenRefreshRateChange(
                static_cast<QWindowSystemInterfacePrivate::ScreenRefreshRateEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::ThemeChange:
        QGuiApplicationPrivate::processThemeChanged(
                    static_cast<QWindowSystemInterfacePrivate::ThemeChangeEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Expose:
        QGuiApplicationPrivate::processExposeEvent(static_cast<QWindowSystemInterfacePrivate::ExposeEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Paint:
        QGuiApplicationPrivate::processPaintEvent(static_cast<QWindowSystemInterfacePrivate::PaintEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::Tablet:
        QGuiApplicationPrivate::processTabletEvent(
                    static_cast<QWindowSystemInterfacePrivate::TabletEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::TabletEnterProximity:
        QGuiApplicationPrivate::processTabletEnterProximityEvent(
                    static_cast<QWindowSystemInterfacePrivate::TabletEnterProximityEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::TabletLeaveProximity:
        QGuiApplicationPrivate::processTabletLeaveProximityEvent(
                    static_cast<QWindowSystemInterfacePrivate::TabletLeaveProximityEvent *>(e));
        break;
#ifndef QT_NO_GESTURES
    case QWindowSystemInterfacePrivate::Gesture:
        QGuiApplicationPrivate::processGestureEvent(
                    static_cast<QWindowSystemInterfacePrivate::GestureEvent *>(e));
        break;
#endif
    case QWindowSystemInterfacePrivate::PlatformPanel:
        QGuiApplicationPrivate::processPlatformPanelEvent(
                    static_cast<QWindowSystemInterfacePrivate::PlatformPanelEvent *>(e));
        break;
    case QWindowSystemInterfacePrivate::FileOpen:
        QGuiApplicationPrivate::processFileOpenEvent(
                    static_cast<QWindowSystemInterfacePrivate::FileOpenEvent *>(e));
        break;
#ifndef QT_NO_CONTEXTMENU
        case QWindowSystemInterfacePrivate::ContextMenu:
        QGuiApplicationPrivate::processContextMenuEvent(
                    static_cast<QWindowSystemInterfacePrivate::ContextMenuEvent *>(e));
        break;
#endif
    case QWindowSystemInterfacePrivate::EnterWhatsThisMode:
        QGuiApplication::postEvent(QGuiApplication::instance(), new QEvent(QEvent::EnterWhatsThisMode));
        break;
    default:
        qWarning() << "Unknown user input event type:" << e->type;
        break;
    }
}
 
void QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent *e)
{
    QEvent::Type type = QEvent::None;
    Qt::MouseButton button = Qt::NoButton;
    QWindow *window = e->window.data();
    const QPointingDevice *device = static_cast<const QPointingDevice *>(e->device);
    Q_ASSERT(device);
    QPointingDevicePrivate *devPriv = QPointingDevicePrivate::get(const_cast<QPointingDevice*>(device));
    bool positionChanged = QGuiApplicationPrivate::lastCursorPosition != e->globalPos;
    bool mouseMove = false;
    bool mousePress = false;
    const QPointF lastGlobalPosition = QGuiApplicationPrivate::lastCursorPosition;
    QPointF globalPoint = e->globalPos;
 
    if (qIsNaN(e->globalPos.x()) || qIsNaN(e->globalPos.y())) {
        qWarning("QGuiApplicationPrivate::processMouseEvent: Got NaN in mouse position");
        return;
    }
 
    type = e->buttonType;
    button = e->button;
 
    if (type == QEvent::NonClientAreaMouseMove || type == QEvent::MouseMove)
        mouseMove = true;
    else if (type == QEvent::NonClientAreaMouseButtonPress || type == QEvent::MouseButtonPress)
        mousePress = true;
 
    if (!mouseMove && positionChanged) {
        QWindowSystemInterfacePrivate::MouseEvent moveEvent(window, e->timestamp,
            e->localPos, e->globalPos, e->buttons ^ button, e->modifiers, Qt::NoButton,
            e->nonClientArea ? QEvent::NonClientAreaMouseMove : QEvent::MouseMove,
            e->source, e->nonClientArea);
        if (e->synthetic())
            moveEvent.flags |= QWindowSystemInterfacePrivate::WindowSystemEvent::Synthetic;
        processMouseEvent(&moveEvent); // mouse move excluding state change
        processMouseEvent(e); // the original mouse event
        return;
    }
    if (type == QEvent::MouseMove && !positionChanged) {
        // On Windows, and possibly other platforms, a touchpad can send a mouse move
        // that does not change position, between a press and a release. This may
        // confuse applications, so we always filter out these mouse events for
        // consistent behavior among platforms.
        return;
    }
 
    modifier_buttons = e->modifiers;
    QPointF localPoint = e->localPos;
    bool doubleClick = false;
    auto persistentEPD = devPriv->pointById(0);
 
    if (mouseMove) {
        QGuiApplicationPrivate::lastCursorPosition = globalPoint;
        const auto doubleClickDistance = (e->device && e->device->type() == QInputDevice::DeviceType::Mouse ?
                    mouseDoubleClickDistance : touchDoubleTapDistance);
        const auto pressPos = persistentEPD->eventPoint.globalPressPosition();
        if (qAbs(globalPoint.x() - pressPos.x()) > doubleClickDistance ||
            qAbs(globalPoint.y() - pressPos.y()) > doubleClickDistance)
            mousePressButton = Qt::NoButton;
    } else {
        mouse_buttons = e->buttons;
        if (mousePress) {
            ulong doubleClickInterval = static_cast<ulong>(QGuiApplication::styleHints()->mouseDoubleClickInterval());
            doubleClick = e->timestamp - persistentEPD->eventPoint.pressTimestamp()
                        < doubleClickInterval && button == mousePressButton;
            mousePressButton = button;
        }
    }
 
    if (e->nullWindow()) {
        window = QGuiApplication::topLevelAt(globalPoint.toPoint());
        if (window) {
            // Moves and the release following a press must go to the same
            // window, even if the cursor has moved on over another window.
            if (e->buttons != Qt::NoButton) {
                if (!currentMousePressWindow)
                    currentMousePressWindow = window;
                else
                    window = currentMousePressWindow;
            } else if (currentMousePressWindow) {
                window = currentMousePressWindow;
                currentMousePressWindow = nullptr;
            }
            localPoint = window->mapFromGlobal(globalPoint);
        }
    }
 
    if (!window)
        return;
 
#ifndef QT_NO_CURSOR
    if (!e->synthetic()) {
        if (const QScreen *screen = window->screen())
            if (QPlatformCursor *cursor = screen->handle()->cursor()) {
                const QPointF nativeLocalPoint = QHighDpi::toNativePixels(localPoint, screen);
                const QPointF nativeGlobalPoint = QHighDpi::toNativePixels(globalPoint, screen);
                QMouseEvent ev(type, nativeLocalPoint, nativeLocalPoint, nativeGlobalPoint,
                               button, e->buttons, e->modifiers, e->source, device);
                // avoid incorrect velocity calculation: ev is in the native coordinate system,
                // but we need to consistently use the logical coordinate system for velocity
                // whenever QEventPoint::setTimestamp() is called
                ev.QInputEvent::setTimestamp(e->timestamp);
                cursor->pointerEvent(ev);
            }
    }
#endif
 
    QMouseEvent ev(type, localPoint, localPoint, globalPoint, button, e->buttons, e->modifiers, e->source, device);
    Q_ASSERT(devPriv->pointById(0) == persistentEPD); // we don't expect reallocation in QPlatformCursor::pointerEvenmt()
    // restore globalLastPosition to avoid invalidating the velocity calculations,
    // because the QPlatformCursor mouse event above was in native coordinates
    QMutableEventPoint::setGlobalLastPosition(persistentEPD->eventPoint, lastGlobalPosition);
    persistentEPD = nullptr; // incoming and synth events can cause reallocation during delivery, so don't use this again
    // ev now contains a detached copy of the QEventPoint from QPointingDevicePrivate::activePoints
    ev.setTimestamp(e->timestamp);
    if (window->d_func()->blockedByModalWindow && !qApp->d_func()->popupActive()) {
        // a modal window is blocking this window, don't allow mouse events through
        return;
    }
 
    if (doubleClick && (ev.type() == QEvent::MouseButtonPress)) {
        // QtBUG-25831, used to suppress delivery in qwidgetwindow.cpp
        QMutableSinglePointEvent::from(ev).setDoubleClick();
    }
 
    QGuiApplication::sendSpontaneousEvent(window, &ev);
    e->eventAccepted = ev.isAccepted();
    if (!e->synthetic() && !ev.isAccepted()
        && !e->nonClientArea
        && qApp->testAttribute(Qt::AA_SynthesizeTouchForUnhandledMouseEvents)) {
        QList<QWindowSystemInterface::TouchPoint> points;
        QWindowSystemInterface::TouchPoint point;
        point.id = 1;
        point.area = QHighDpi::toNativePixels(QRectF(globalPoint.x() - 2, globalPoint.y() - 2, 4, 4), window);
 
        // only translate left button related events to
        // avoid strange touch event sequences when several
        // buttons are pressed
        if (type == QEvent::MouseButtonPress && button == Qt::LeftButton) {
            point.state = QEventPoint::State::Pressed;
        } else if (type == QEvent::MouseButtonRelease && button == Qt::LeftButton) {
            point.state = QEventPoint::State::Released;
        } else if (type == QEvent::MouseMove && (e->buttons & Qt::LeftButton)) {
            point.state = QEventPoint::State::Updated;
        } else {
            return;
        }
 
        points << point;
 
        QEvent::Type type;
        const QList<QEventPoint> &touchPoints =
                QWindowSystemInterfacePrivate::fromNativeTouchPoints(points, window, &type);
 
        QWindowSystemInterfacePrivate::TouchEvent fake(window, e->timestamp, type, device, touchPoints, e->modifiers);
        fake.flags |= QWindowSystemInterfacePrivate::WindowSystemEvent::Synthetic;
        processTouchEvent(&fake);
    }
    if (doubleClick) {
        mousePressButton = Qt::NoButton;
        if (!e->window.isNull() || e->nullWindow()) { // QTBUG-36364, check if window closed in response to press
            const QEvent::Type doubleClickType = e->nonClientArea ? QEvent::NonClientAreaMouseButtonDblClick : QEvent::MouseButtonDblClick;
            QMouseEvent dblClickEvent(doubleClickType, localPoint, localPoint, globalPoint,
                                      button, e->buttons, e->modifiers, e->source, device);
            dblClickEvent.setTimestamp(e->timestamp);
            QGuiApplication::sendSpontaneousEvent(window, &dblClickEvent);
        }
    }
    if (type == QEvent::MouseButtonRelease && e->buttons == Qt::NoButton) {
        if (auto *persistentEPD = devPriv->queryPointById(0)) {
            ev.setExclusiveGrabber(persistentEPD->eventPoint, nullptr);
            ev.clearPassiveGrabbers(persistentEPD->eventPoint);
        }
    }
}
 
void QGuiApplicationPrivate::processWheelEvent(QWindowSystemInterfacePrivate::WheelEvent *e)
{
#if QT_CONFIG(wheelevent)
    QWindow *window = e->window.data();
    QPointF globalPoint = e->globalPos;
    QPointF localPoint = e->localPos;
 
    if (e->nullWindow()) {
        window = QGuiApplication::topLevelAt(globalPoint.toPoint());
        if (window)
            localPoint = window->mapFromGlobal(globalPoint);
    }
 
    if (!window)
        return;
 
    QGuiApplicationPrivate::lastCursorPosition = globalPoint;
    modifier_buttons = e->modifiers;
 
    if (window->d_func()->blockedByModalWindow) {
        // a modal window is blocking this window, don't allow wheel events through
        return;
    }
 
    const QPointingDevice *device = static_cast<const QPointingDevice *>(e->device);
    QWheelEvent ev(localPoint, globalPoint, e->pixelDelta, e->angleDelta,
                   mouse_buttons, e->modifiers, e->phase, e->inverted, e->source, device);
    ev.setTimestamp(e->timestamp);
    QGuiApplication::sendSpontaneousEvent(window, &ev);
    e->eventAccepted = ev.isAccepted();
#else
     Q_UNUSED(e);
#endif // QT_CONFIG(wheelevent)
}
 
void QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent *e)
{
    QWindow *window = e->window.data();
    modifier_buttons = e->modifiers;
    if (e->nullWindow()
#ifdef Q_OS_ANDROID
           || e->key == Qt::Key_Back || e->key == Qt::Key_Menu
#endif
            ) {
        window = QGuiApplication::focusWindow();
    }
 
#if defined(Q_OS_ANDROID)
    static bool backKeyPressAccepted = false;
    static bool menuKeyPressAccepted = false;
#endif
 
#if !defined(Q_OS_MACOS)
    // FIXME: Include OS X in this code path by passing the key event through
    // QPlatformInputContext::filterEvent().
    if (e->keyType == QEvent::KeyPress && window) {
        if (QWindowSystemInterface::handleShortcutEvent(window, e->timestamp, e->key, e->modifiers,
            e->nativeScanCode, e->nativeVirtualKey, e->nativeModifiers, e->unicode, e->repeat, e->repeatCount)) {
#if defined(Q_OS_ANDROID)
            backKeyPressAccepted = e->key == Qt::Key_Back;
            menuKeyPressAccepted = e->key == Qt::Key_Menu;
#endif
            return;
        }
    }
#endif
 
    QKeyEvent ev(e->keyType, e->key, e->modifiers,
                 e->nativeScanCode, e->nativeVirtualKey, e->nativeModifiers,
                 e->unicode, e->repeat, e->repeatCount);
    ev.setTimestamp(e->timestamp);
 
    // only deliver key events when we have a window, and no modal window is blocking this window
 
    if (window && !window->d_func()->blockedByModalWindow)
        QGuiApplication::sendSpontaneousEvent(window, &ev);
#ifdef Q_OS_ANDROID
    else
        ev.setAccepted(false);
 
    if (e->keyType == QEvent::KeyPress) {
        backKeyPressAccepted = e->key == Qt::Key_Back && ev.isAccepted();
        menuKeyPressAccepted = e->key == Qt::Key_Menu && ev.isAccepted();
    } else if (e->keyType == QEvent::KeyRelease) {
        if (e->key == Qt::Key_Back && !backKeyPressAccepted && !ev.isAccepted()) {
            if (window)
                QWindowSystemInterface::handleCloseEvent(window);
        } else if (e->key == Qt::Key_Menu && !menuKeyPressAccepted && !ev.isAccepted()) {
            platform_theme->showPlatformMenuBar();
        }
    }
#endif
    e->eventAccepted = ev.isAccepted();
}
 
void QGuiApplicationPrivate::processEnterEvent(QWindowSystemInterfacePrivate::EnterEvent *e)
{
    if (!e->enter)
        return;
    if (e->enter.data()->d_func()->blockedByModalWindow) {
        // a modal window is blocking this window, don't allow enter events through
        return;
    }
 
    currentMouseWindow = e->enter;
 
    // TODO later: EnterEvent must report _which_ mouse entered the window; for now we assume primaryPointingDevice()
    QEnterEvent event(e->localPos, e->localPos, e->globalPos);
 
    // Since we don't always track mouse moves that occur outside a window, any residual velocity
    // stored in the persistent QEventPoint may be inaccurate (especially in fast-moving autotests).
    // Reset the Kalman filter so that the velocity of the first mouse event after entering the window
    // will be based on a zero residual velocity (but the result can still be non-zero if the mouse
    // moves to a different position from where this enter event occurred; tests often do that).
    const QPointingDevicePrivate *devPriv = QPointingDevicePrivate::get(event.pointingDevice());
    auto epd = devPriv->queryPointById(event.points().first().id());
    Q_ASSERT(epd);
    QMutableEventPoint::setVelocity(epd->eventPoint, {});
 
    QCoreApplication::sendSpontaneousEvent(e->enter.data(), &event);
}
 
void QGuiApplicationPrivate::processLeaveEvent(QWindowSystemInterfacePrivate::LeaveEvent *e)
{
    if (!e->leave)
        return;
    if (e->leave.data()->d_func()->blockedByModalWindow) {
        // a modal window is blocking this window, don't allow leave events through
        return;
    }
 
    currentMouseWindow = nullptr;
 
    QEvent event(QEvent::Leave);
    QCoreApplication::sendSpontaneousEvent(e->leave.data(), &event);
}
 
void QGuiApplicationPrivate::processActivatedEvent(QWindowSystemInterfacePrivate::ActivatedWindowEvent *e)
{
    QWindow *previous = QGuiApplicationPrivate::focus_window;
    QWindow *newFocus = e->activated.data();
 
    if (previous == newFocus)
        return;
 
    if (newFocus)
        if (QPlatformWindow *platformWindow = newFocus->handle())
            if (platformWindow->isAlertState())
                platformWindow->setAlertState(false);
 
    QObject *previousFocusObject = previous ? previous->focusObject() : nullptr;
 
    if (previous) {
        QFocusEvent focusAboutToChange(QEvent::FocusAboutToChange);
        QCoreApplication::sendSpontaneousEvent(previous, &focusAboutToChange);
    }
 
    QGuiApplicationPrivate::focus_window = newFocus;
    if (!qApp)
        return;
 
    if (previous) {
        Qt::FocusReason r = e->reason;
        if ((r == Qt::OtherFocusReason || r == Qt::ActiveWindowFocusReason) &&
                newFocus && (newFocus->flags() & Qt::Popup) == Qt::Popup)
            r = Qt::PopupFocusReason;
        QFocusEvent focusOut(QEvent::FocusOut, r);
        QCoreApplication::sendSpontaneousEvent(previous, &focusOut);
        QObject::disconnect(previous, SIGNAL(focusObjectChanged(QObject*)),
                            qApp, SLOT(_q_updateFocusObject(QObject*)));
    } else if (!platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState)) {
        setApplicationState(Qt::ApplicationActive);
    }
 
    if (QGuiApplicationPrivate::focus_window) {
        Qt::FocusReason r = e->reason;
        if ((r == Qt::OtherFocusReason || r == Qt::ActiveWindowFocusReason) &&
                previous && (previous->flags() & Qt::Popup) == Qt::Popup)
            r = Qt::PopupFocusReason;
        QFocusEvent focusIn(QEvent::FocusIn, r);
        QCoreApplication::sendSpontaneousEvent(QGuiApplicationPrivate::focus_window, &focusIn);
        QObject::connect(QGuiApplicationPrivate::focus_window, SIGNAL(focusObjectChanged(QObject*)),
                         qApp, SLOT(_q_updateFocusObject(QObject*)));
    } else if (!platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState)) {
        setApplicationState(Qt::ApplicationInactive);
    }
 
    if (self) {
        self->notifyActiveWindowChange(previous);
 
        if (previousFocusObject != qApp->focusObject() ||
            // We are getting an activation change but there is no new focusObject, and we also
            // don't have a previousFocusObject in the previously active window anymore. This can
            // happen when window gets destroyed (see QWidgetWindow::focusObject returning nullptr
            // when already in the QWidget destructor), so update the focusObject to avoid dangling
            // pointers. See also QWidget::clearFocus(), which tries to cover for this as well.
            (previous && previousFocusObject == nullptr && qApp->focusObject() == nullptr)) {
            self->_q_updateFocusObject(qApp->focusObject());
        }
    }
 
    emit qApp->focusWindowChanged(newFocus);
    if (previous)
        emit previous->activeChanged();
    if (newFocus)
        emit newFocus->activeChanged();
}
 
void QGuiApplicationPrivate::processWindowStateChangedEvent(QWindowSystemInterfacePrivate::WindowStateChangedEvent *wse)
{
    if (QWindow *window = wse->window.data()) {
        QWindowPrivate *windowPrivate = qt_window_private(window);
        const auto originalEffectiveState = QWindowPrivate::effectiveState(windowPrivate->windowState);
 
        windowPrivate->windowState = wse->newState;
        const auto newEffectiveState = QWindowPrivate::effectiveState(windowPrivate->windowState);
        if (newEffectiveState != originalEffectiveState)
            emit window->windowStateChanged(newEffectiveState);
 
        windowPrivate->updateVisibility();
 
        QWindowStateChangeEvent e(wse->oldState);
        QGuiApplication::sendSpontaneousEvent(window, &e);
    }
}
 
void QGuiApplicationPrivate::processWindowScreenChangedEvent(QWindowSystemInterfacePrivate::WindowScreenChangedEvent *wse)
{
    if (QWindow *window  = wse->window.data()) {
        if (window->screen() == wse->screen.data())
            return;
 
        if (QWindow *topLevelWindow = window->d_func()->topLevelWindow(QWindow::ExcludeTransients)) {
            if (QScreen *screen = wse->screen.data())
                topLevelWindow->d_func()->setTopLevelScreen(screen, false /* recreate */);
            else // Fall back to default behavior, and try to find some appropriate screen
                topLevelWindow->setScreen(nullptr);
        }
 
        // We may have changed scaling; trigger resize event if needed,
        // except on Windows, where we send resize events during WM_DPICHANGED
        // event handling. FIXME: unify DPI change handling across all platforms.
#ifndef Q_OS_WIN
        if (window->handle()) {
            QWindowSystemInterfacePrivate::GeometryChangeEvent gce(window, QHighDpi::fromNativePixels(window->handle()->geometry(), window));
            processGeometryChangeEvent(&gce);
        }
#endif
        QWindowPrivate::get(window)->updateDevicePixelRatio();
    }
}
 
void QGuiApplicationPrivate::processWindowDevicePixelRatioChangedEvent(QWindowSystemInterfacePrivate::WindowDevicePixelRatioChangedEvent *wde)
{
    if (wde->window.isNull())
        return;
    QWindowPrivate::get(wde->window)->updateDevicePixelRatio();
}
 
void QGuiApplicationPrivate::processSafeAreaMarginsChangedEvent(QWindowSystemInterfacePrivate::SafeAreaMarginsChangedEvent *wse)
{
    if (wse->window.isNull())
        return;
 
    // Handle by forwarding directly to QWindowPrivate, instead of sending spontaneous
    // QEvent like most other functions, as there's no QEvent type for the safe area
    // change, and we don't want to add one until we know that this is a good API.
    qt_window_private(wse->window)->processSafeAreaMarginsChanged();
}
 
void QGuiApplicationPrivate::processThemeChanged(QWindowSystemInterfacePrivate::ThemeChangeEvent *tce)
{
    if (self)
        self->handleThemeChanged();
 
    QIconPrivate::clearIconCache();
 
    QStyleHintsPrivate::get(QGuiApplication::styleHints())->setColorScheme(colorScheme());
 
    QEvent themeChangeEvent(QEvent::ThemeChange);
    const QWindowList windows = tce->window ? QWindowList{tce->window} : window_list;
    for (auto *window : windows)
        QGuiApplication::sendSpontaneousEvent(window, &themeChangeEvent);
}
 
Qt::ColorScheme QGuiApplicationPrivate::colorScheme()
{
    return platformTheme() ? platformTheme()->colorScheme()
                           : Qt::ColorScheme::Unknown;
}
 
void QGuiApplicationPrivate::handleThemeChanged()
{
    updatePalette();
 
    QIconLoader::instance()->updateSystemTheme();
    QAbstractFileIconProviderPrivate::clearIconTypeCache();
 
    if (!(applicationResourceFlags & ApplicationFontExplicitlySet)) {
        const auto locker = qt_scoped_lock(applicationFontMutex);
        clearFontUnlocked();
        initFontUnlocked();
    }
    initThemeHints();
}
 
void QGuiApplicationPrivate::processGeometryChangeEvent(QWindowSystemInterfacePrivate::GeometryChangeEvent *e)
{
    if (e->window.isNull())
       return;
 
    QWindow *window = e->window.data();
    if (!window)
        return;
 
    const QRect lastReportedGeometry = window->d_func()->geometry;
    const QRect requestedGeometry = e->requestedGeometry;
    const QRect actualGeometry = e->newGeometry;
 
    // We send size and move events only if the geometry has changed from
    // what was last reported, or if the user tried to set a new geometry,
    // but the window manager responded by keeping the old geometry. In the
    // latter case we send move/resize events with the same geometry as the
    // last reported geometry, to indicate that the window wasn't moved or
    // resized. Note that this logic does not apply to the property changes
    // of the window, as we don't treat them as part of this request/response
    // protocol of QWindow/QPA.
    const bool isResize = actualGeometry.size() != lastReportedGeometry.size()
        || requestedGeometry.size() != actualGeometry.size();
    const bool isMove = actualGeometry.topLeft() != lastReportedGeometry.topLeft()
        || requestedGeometry.topLeft() != actualGeometry.topLeft();
 
    window->d_func()->geometry = actualGeometry;
 
    if (isResize || window->d_func()->resizeEventPending) {
        QResizeEvent e(actualGeometry.size(), lastReportedGeometry.size());
        QGuiApplication::sendSpontaneousEvent(window, &e);
 
        window->d_func()->resizeEventPending = false;
 
        if (actualGeometry.width() != lastReportedGeometry.width())
            emit window->widthChanged(actualGeometry.width());
        if (actualGeometry.height() != lastReportedGeometry.height())
            emit window->heightChanged(actualGeometry.height());
    }
 
    if (isMove) {
        //### frame geometry
        QMoveEvent e(actualGeometry.topLeft(), lastReportedGeometry.topLeft());
        QGuiApplication::sendSpontaneousEvent(window, &e);
 
        if (actualGeometry.x() != lastReportedGeometry.x())
            emit window->xChanged(actualGeometry.x());
        if (actualGeometry.y() != lastReportedGeometry.y())
            emit window->yChanged(actualGeometry.y());
    }
}
 
void QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent *e)
{
    if (e->window.isNull())
        return;
    if (e->window.data()->d_func()->blockedByModalWindow && !e->window.data()->d_func()->inClose) {
        // a modal window is blocking this window, don't allow close events through, unless they
        // originate from a call to QWindow::close.
        e->eventAccepted = false;
        return;
    }
 
    QCloseEvent event;
    QGuiApplication::sendSpontaneousEvent(e->window.data(), &event);
 
    e->eventAccepted = event.isAccepted();
}
 
void QGuiApplicationPrivate::processFileOpenEvent(QWindowSystemInterfacePrivate::FileOpenEvent *e)
{
    if (e->url.isEmpty())
        return;
 
    QFileOpenEvent event(e->url);
    QGuiApplication::sendSpontaneousEvent(qApp, &event);
}
 
QGuiApplicationPrivate::TabletPointData &QGuiApplicationPrivate::tabletDevicePoint(qint64 deviceId)
{
    for (int i = 0; i < tabletDevicePoints.size(); ++i) {
        TabletPointData &pointData = tabletDevicePoints[i];
        if (pointData.deviceId == deviceId)
            return pointData;
    }
 
    tabletDevicePoints.append(TabletPointData(deviceId));
    return tabletDevicePoints.last();
}
 
void QGuiApplicationPrivate::processTabletEvent(QWindowSystemInterfacePrivate::TabletEvent *e)
{
#if QT_CONFIG(tabletevent)
    const auto device = static_cast<const QPointingDevice *>(e->device);
    TabletPointData &pointData = tabletDevicePoint(device->uniqueId().numericId());
 
    QEvent::Type type = QEvent::TabletMove;
    if (e->buttons != pointData.state)
        type = (e->buttons > pointData.state) ? QEvent::TabletPress : QEvent::TabletRelease;
 
    QWindow *window = e->window.data();
    modifier_buttons = e->modifiers;
 
    bool localValid = true;
    // If window is null, pick one based on the global position and make sure all
    // subsequent events up to the release are delivered to that same window.
    // If window is given, just send to that.
    if (type == QEvent::TabletPress) {
        if (e->nullWindow()) {
            window = QGuiApplication::topLevelAt(e->global.toPoint());
            localValid = false;
        }
        if (!window)
            return;
        pointData.target = window;
    } else {
        if (e->nullWindow()) {
            window = pointData.target;
            localValid = false;
        }
        if (type == QEvent::TabletRelease)
            pointData.target = nullptr;
        if (!window)
            return;
    }
    QPointF local = e->local;
    if (!localValid) {
        QPointF delta = e->global - e->global.toPoint();
        local = window->mapFromGlobal(e->global.toPoint()) + delta;
    }
 
    // TODO stop deducing the button state change here: rather require it from the platform plugin, as with mouse events
    Qt::MouseButtons stateChange = e->buttons ^ pointData.state;
    Qt::MouseButton button = Qt::NoButton;
    for (int check = Qt::LeftButton; check <= int(Qt::MaxMouseButton); check = check << 1) {
        if (check & stateChange) {
            button = Qt::MouseButton(check);
            break;
        }
    }
 
    QTabletEvent tabletEvent(type, device, local, e->global,
                             e->pressure, e->xTilt, e->yTilt,
                             e->tangentialPressure, e->rotation, e->z,
                             e->modifiers, button, e->buttons);
    tabletEvent.setAccepted(false);
    tabletEvent.setTimestamp(e->timestamp);
    QGuiApplication::sendSpontaneousEvent(window, &tabletEvent);
    pointData.state = e->buttons;
    if (!tabletEvent.isAccepted()
        && !QWindowSystemInterfacePrivate::TabletEvent::platformSynthesizesMouse
        && qApp->testAttribute(Qt::AA_SynthesizeMouseForUnhandledTabletEvents)) {
 
        const QEvent::Type mouseType = [&]() {
            switch (type) {
            case QEvent::TabletPress:   return QEvent::MouseButtonPress;
            case QEvent::TabletMove:    return QEvent::MouseMove;
            case QEvent::TabletRelease: return QEvent::MouseButtonRelease;
            default: Q_UNREACHABLE();
            }
        }();
        QWindowSystemInterfacePrivate::MouseEvent mouseEvent(window, e->timestamp, e->local,
            e->global, e->buttons, e->modifiers, button, mouseType, Qt::MouseEventNotSynthesized, false, device);
        mouseEvent.flags |= QWindowSystemInterfacePrivate::WindowSystemEvent::Synthetic;
        qCDebug(lcPtrDispatch) << "synthesizing mouse from tablet event" << mouseType
                               << e->local << button << e->buttons << e->modifiers;
        processMouseEvent(&mouseEvent);
    }
#else
    Q_UNUSED(e);
#endif
}
 
void QGuiApplicationPrivate::processTabletEnterProximityEvent(QWindowSystemInterfacePrivate::TabletEnterProximityEvent *e)
{
#if QT_CONFIG(tabletevent)
    const QPointingDevice *dev = static_cast<const QPointingDevice *>(e->device);
    QTabletEvent ev(QEvent::TabletEnterProximity, dev, QPointF(), QPointF(),
                    0, 0, 0, 0, 0, 0, e->modifiers, Qt::NoButton,
                    tabletDevicePoint(dev->uniqueId().numericId()).state);
    ev.setTimestamp(e->timestamp);
    QGuiApplication::sendSpontaneousEvent(qGuiApp, &ev);
#else
    Q_UNUSED(e);
#endif
}
 
void QGuiApplicationPrivate::processTabletLeaveProximityEvent(QWindowSystemInterfacePrivate::TabletLeaveProximityEvent *e)
{
#if QT_CONFIG(tabletevent)
    const QPointingDevice *dev = static_cast<const QPointingDevice *>(e->device);
    QTabletEvent ev(QEvent::TabletLeaveProximity, dev, QPointF(), QPointF(),
                    0, 0, 0, 0, 0, 0, e->modifiers, Qt::NoButton,
                    tabletDevicePoint(dev->uniqueId().numericId()).state);
    ev.setTimestamp(e->timestamp);
    QGuiApplication::sendSpontaneousEvent(qGuiApp, &ev);
#else
    Q_UNUSED(e);
#endif
}
 
#ifndef QT_NO_GESTURES
void QGuiApplicationPrivate::processGestureEvent(QWindowSystemInterfacePrivate::GestureEvent *e)
{
    if (e->window.isNull())
        return;
 
    const QPointingDevice *device = static_cast<const QPointingDevice *>(e->device);
    QNativeGestureEvent ev(e->type, device, e->fingerCount, e->pos, e->pos, e->globalPos, (e->intValue ? e->intValue : e->realValue),
                           e->delta, e->sequenceId);
    ev.setTimestamp(e->timestamp);
    QGuiApplication::sendSpontaneousEvent(e->window, &ev);
}
#endif // QT_NO_GESTURES
 
void QGuiApplicationPrivate::processPlatformPanelEvent(QWindowSystemInterfacePrivate::PlatformPanelEvent *e)
{
    if (!e->window)
        return;
 
    if (e->window->d_func()->blockedByModalWindow) {
        // a modal window is blocking this window, don't allow events through
        return;
    }
 
    QEvent ev(QEvent::PlatformPanel);
    QGuiApplication::sendSpontaneousEvent(e->window.data(), &ev);
}
 
#ifndef QT_NO_CONTEXTMENU
void QGuiApplicationPrivate::processContextMenuEvent(QWindowSystemInterfacePrivate::ContextMenuEvent *e)
{
    // Widgets do not care about mouse triggered context menu events. Also, do not forward event
    // to a window blocked by a modal window.
    if (!e->window || e->mouseTriggered || e->window->d_func()->blockedByModalWindow)
        return;
 
    QContextMenuEvent ev(QContextMenuEvent::Keyboard, e->pos, e->globalPos, e->modifiers);
    QGuiApplication::sendSpontaneousEvent(e->window.data(), &ev);
}
#endif
 
void QGuiApplicationPrivate::processTouchEvent(QWindowSystemInterfacePrivate::TouchEvent *e)
{
    if (!QInputDevicePrivate::isRegistered(e->device))
        return;
 
    modifier_buttons = e->modifiers;
    QPointingDevice *device = const_cast<QPointingDevice *>(static_cast<const QPointingDevice *>(e->device));
    QPointingDevicePrivate *devPriv = QPointingDevicePrivate::get(device);
 
    if (e->touchType == QEvent::TouchCancel) {
        // The touch sequence has been canceled (e.g. by the compositor).
        // Send the TouchCancel to all windows with active touches and clean up.
        QTouchEvent touchEvent(QEvent::TouchCancel, device, e->modifiers);
        touchEvent.setTimestamp(e->timestamp);
        QSet<QWindow *> windowsNeedingCancel;
 
        for (auto &epd : devPriv->activePoints.values()) {
            if (QWindow *w = QMutableEventPoint::window(epd.eventPoint))
                windowsNeedingCancel.insert(w);
        }
 
        for (QSet<QWindow *>::const_iterator winIt = windowsNeedingCancel.constBegin(),
            winItEnd = windowsNeedingCancel.constEnd(); winIt != winItEnd; ++winIt) {
            QGuiApplication::sendSpontaneousEvent(*winIt, &touchEvent);
        }
        if (!self->synthesizedMousePoints.isEmpty() && !e->synthetic()) {
            for (QHash<QWindow *, SynthesizedMouseData>::const_iterator synthIt = self->synthesizedMousePoints.constBegin(),
                 synthItEnd = self->synthesizedMousePoints.constEnd(); synthIt != synthItEnd; ++synthIt) {
                if (!synthIt->window)
                    continue;
                QWindowSystemInterfacePrivate::MouseEvent fake(synthIt->window.data(),
                                                               e->timestamp,
                                                               synthIt->pos,
                                                               synthIt->screenPos,
                                                               Qt::NoButton,
                                                               e->modifiers,
                                                               Qt::LeftButton,
                                                               QEvent::MouseButtonRelease,
                                                               Qt::MouseEventNotSynthesized,
                                                               false,
                                                               device);
                fake.flags |= QWindowSystemInterfacePrivate::WindowSystemEvent::Synthetic;
                processMouseEvent(&fake);
            }
            self->synthesizedMousePoints.clear();
        }
        self->lastTouchType = e->touchType;
        return;
    }
 
    // Prevent sending ill-formed event sequences: Cancel can only be followed by a Begin.
    if (self->lastTouchType == QEvent::TouchCancel && e->touchType != QEvent::TouchBegin)
        return;
 
    self->lastTouchType = e->touchType;
 
    QPointer<QWindow> window = e->window;  // the platform hopefully tells us which window received the event
    QVarLengthArray<QMutableTouchEvent, 2> touchEvents;
 
    // For each temporary QEventPoint from the QPA TouchEvent:
    // - update the persistent QEventPoint in QPointingDevicePrivate::activePoints with current values
    // - determine which window to deliver it to
    // - add it to the QTouchEvent instance for that window (QMutableTouchEvent::target() will be QWindow*, for now)
    for (auto &tempPt : e->points) {
        // update state
        auto epd = devPriv->pointById(tempPt.id());
        auto &ep = epd->eventPoint;
        epd->eventPoint.setAccepted(false);
        switch (tempPt.state()) {
        case QEventPoint::State::Pressed:
            // On touchpads, send all touch points to the same window.
            if (!window && e->device && e->device->type() == QInputDevice::DeviceType::TouchPad)
                window = devPriv->firstActiveWindow();
            // If the QPA event didn't tell us which window, find the one under the touchpoint position.
            if (!window)
                window = QGuiApplication::topLevelAt(tempPt.globalPosition().toPoint());
            QMutableEventPoint::setWindow(ep, window);
            break;
 
        case QEventPoint::State::Released:
            if (Q_UNLIKELY(!window.isNull() && window != QMutableEventPoint::window(ep)))
                qCDebug(lcPtrDispatch) << "delivering touch release to same window"
                                       << QMutableEventPoint::window(ep) << "not" << window.data();
            window = QMutableEventPoint::window(ep);
            break;
 
        default: // update or stationary
            if (Q_UNLIKELY(!window.isNull() && window != QMutableEventPoint::window(ep)))
                qCDebug(lcPtrDispatch) << "delivering touch update to same window"
                                       << QMutableEventPoint::window(ep) << "not" << window.data();
            window = QMutableEventPoint::window(ep);
            break;
        }
        // If we somehow still don't have a window, we can't deliver this touchpoint.  (should never happen)
        if (Q_UNLIKELY(!window)) {
            qCWarning(lcPtrDispatch) << "skipping" << &tempPt << ": no target window";
            continue;
        }
        QMutableEventPoint::update(tempPt, ep);
 
        Q_ASSERT(window.data() != nullptr);
 
        // make the *scene* position the same as the *global* position
        QMutableEventPoint::setScenePosition(ep, tempPt.globalPosition());
 
        // store the scene position as local position, for now
        QMutableEventPoint::setPosition(ep, window->mapFromGlobal(tempPt.globalPosition()));
 
        // setTimeStamp has side effects, so we do it last
        QMutableEventPoint::setTimestamp(ep, e->timestamp);
 
        // add the touchpoint to the event that will be delivered to the window
        bool added = false;
        for (QMutableTouchEvent &ev : touchEvents) {
            if (ev.target() == window.data()) {
                ev.addPoint(ep);
                added = true;
                break;
            }
        }
        if (!added) {
            QMutableTouchEvent mte(e->touchType, device, e->modifiers, {ep});
            mte.setTimestamp(e->timestamp);
            mte.setTarget(window.data());
            touchEvents.append(mte);
        }
    }
 
    if (touchEvents.isEmpty())
        return;
 
    for (QMutableTouchEvent &touchEvent : touchEvents) {
        QWindow *window = static_cast<QWindow *>(touchEvent.target());
 
        QEvent::Type eventType;
        switch (touchEvent.touchPointStates()) {
        case QEventPoint::State::Pressed:
            eventType = QEvent::TouchBegin;
            break;
        case QEventPoint::State::Released:
            eventType = QEvent::TouchEnd;
            break;
        default:
            eventType = QEvent::TouchUpdate;
            break;
        }
 
        if (window->d_func()->blockedByModalWindow && !qApp->d_func()->popupActive()) {
            // a modal window is blocking this window, don't allow touch events through
 
            // QTBUG-37371 temporary fix; TODO: revisit when we have a forwarding solution
            if (touchEvent.type() == QEvent::TouchEnd) {
                // but don't leave dangling state: e.g.
                // QQuickWindowPrivate::itemForTouchPointId needs to be cleared.
                QTouchEvent touchEvent(QEvent::TouchCancel, device, e->modifiers);
                touchEvent.setTimestamp(e->timestamp);
                QGuiApplication::sendSpontaneousEvent(window, &touchEvent);
            }
            continue;
        }
 
        // Note: after the call to sendSpontaneousEvent, touchEvent.position() will have
        // changed to reflect the local position inside the last (random) widget it tried
        // to deliver the touch event to, and will therefore be invalid afterwards.
        QGuiApplication::sendSpontaneousEvent(window, &touchEvent);
 
        if (!e->synthetic() && !touchEvent.isAccepted() && qApp->testAttribute(Qt::AA_SynthesizeMouseForUnhandledTouchEvents)) {
            // exclude devices which generate their own mouse events
            if (!(touchEvent.device()->capabilities().testFlag(QInputDevice::Capability::MouseEmulation))) {
 
                QEvent::Type mouseEventType = QEvent::MouseMove;
                Qt::MouseButton button = Qt::NoButton;
                Qt::MouseButtons buttons = Qt::LeftButton;
                if (eventType == QEvent::TouchBegin || m_fakeMouseSourcePointId < 0) {
                    m_fakeMouseSourcePointId = touchEvent.point(0).id();
                    qCDebug(lcPtrDispatch) << "synthesizing mouse events from touchpoint" << m_fakeMouseSourcePointId;
                }
                if (m_fakeMouseSourcePointId >= 0) {
                    const auto *touchPoint = touchEvent.pointById(m_fakeMouseSourcePointId);
                    if (touchPoint) {
                        switch (touchPoint->state()) {
                        case QEventPoint::State::Pressed:
                            mouseEventType = QEvent::MouseButtonPress;
                            button = Qt::LeftButton;
                            break;
                        case QEventPoint::State::Released:
                            mouseEventType = QEvent::MouseButtonRelease;
                            button = Qt::LeftButton;
                            buttons = Qt::NoButton;
                            Q_ASSERT(m_fakeMouseSourcePointId == touchPoint->id());
                            m_fakeMouseSourcePointId = -1;
                            break;
                        default:
                            break;
                        }
                        if (touchPoint->state() != QEventPoint::State::Released) {
                            self->synthesizedMousePoints.insert(window, SynthesizedMouseData(
                                                                    touchPoint->position(), touchPoint->globalPosition(), window));
                        }
                        // All touch events that are not accepted by the application will be translated to
                        // left mouse button events instead (see AA_SynthesizeMouseForUnhandledTouchEvents docs).
                        // TODO why go through QPA?  Why not just send a QMouseEvent right from here?
                        QWindowSystemInterfacePrivate::MouseEvent fake(window, e->timestamp,
                                                                       window->mapFromGlobal(touchPoint->globalPosition().toPoint()),
                                                                       touchPoint->globalPosition(),
                                                                       buttons,
                                                                       e->modifiers,
                                                                       button,
                                                                       mouseEventType,
                                                                       Qt::MouseEventSynthesizedByQt,
                                                                       false,
                                                                       device);
                        fake.flags |= QWindowSystemInterfacePrivate::WindowSystemEvent::Synthetic;
                        processMouseEvent(&fake);
                    }
                }
                if (eventType == QEvent::TouchEnd)
                    self->synthesizedMousePoints.clear();
            }
        }
    }
 
    // Remove released points from QPointingDevicePrivate::activePoints only after the event is
    // delivered.  Widgets and Qt Quick are allowed to access them at any time before this.
    for (const QEventPoint &touchPoint : e->points) {
        if (touchPoint.state() == QEventPoint::State::Released)
            devPriv->removePointById(touchPoint.id());
    }
}
 
void QGuiApplicationPrivate::processScreenOrientationChange(QWindowSystemInterfacePrivate::ScreenOrientationEvent *e)
{
    // This operation only makes sense after the QGuiApplication constructor runs
    if (QCoreApplication::startingUp())
        return;
 
    if (!e->screen)
        return;
 
    QScreen *s = e->screen.data();
    s->d_func()->orientation = e->orientation;
 
    emit s->orientationChanged(s->orientation());
 
    QScreenOrientationChangeEvent event(s, s->orientation());
    QCoreApplication::sendEvent(QCoreApplication::instance(), &event);
}
 
void QGuiApplicationPrivate::processScreenGeometryChange(QWindowSystemInterfacePrivate::ScreenGeometryEvent *e)
{
    // This operation only makes sense after the QGuiApplication constructor runs
    if (QCoreApplication::startingUp())
        return;
 
    if (!e->screen)
        return;
 
    {
        QScreen *s = e->screen.data();
        QScreenPrivate::UpdateEmitter updateEmitter(s);
 
        // Note: The incoming geometries have already been scaled by QHighDpi
        // in the QWSI layer, so we don't need to call updateGeometry() here.
        s->d_func()->geometry = e->geometry;
        s->d_func()->availableGeometry = e->availableGeometry;
 
        s->d_func()->updatePrimaryOrientation();
    }
 
    resetCachedDevicePixelRatio();
}
 
void QGuiApplicationPrivate::processScreenLogicalDotsPerInchChange(QWindowSystemInterfacePrivate::ScreenLogicalDotsPerInchEvent *e)
{
    // This operation only makes sense after the QGuiApplication constructor runs
    if (QCoreApplication::startingUp())
        return;
 
    QHighDpiScaling::updateHighDpiScaling();
 
    if (!e->screen)
        return;
 
    {
        QScreen *s = e->screen.data();
        QScreenPrivate::UpdateEmitter updateEmitter(s);
        s->d_func()->logicalDpi = QDpi(e->dpiX, e->dpiY);
        s->d_func()->updateGeometry();
    }
 
    for (QWindow *window : QGuiApplication::allWindows())
        if (window->screen() == e->screen)
            QWindowPrivate::get(window)->updateDevicePixelRatio();
 
    resetCachedDevicePixelRatio();
}
 
void QGuiApplicationPrivate::processScreenRefreshRateChange(QWindowSystemInterfacePrivate::ScreenRefreshRateEvent *e)
{
    // This operation only makes sense after the QGuiApplication constructor runs
    if (QCoreApplication::startingUp())
        return;
 
    if (!e->screen)
        return;
 
    QScreen *s = e->screen.data();
    qreal rate = e->rate;
    // safeguard ourselves against buggy platform behavior...
    if (rate < 1.0)
        rate = 60.0;
    if (!qFuzzyCompare(s->d_func()->refreshRate, rate)) {
        s->d_func()->refreshRate = rate;
        emit s->refreshRateChanged(s->refreshRate());
    }
}
 
void QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent *e)
{
    if (!e->window)
        return;
 
    QWindow *window = e->window.data();
    if (!window)
        return;
    QWindowPrivate *p = qt_window_private(window);
 
    if (!p->receivedExpose) {
        if (p->resizeEventPending) {
            // as a convenience for plugins, send a resize event before the first expose event if they haven't done so
            // window->geometry() should have a valid size as soon as a handle exists.
            QResizeEvent e(window->geometry().size(), p->geometry.size());
            QGuiApplication::sendSpontaneousEvent(window, &e);
 
            p->resizeEventPending = false;
        }
 
        // FIXME: It would logically make sense to set this _after_ we've sent the
        // expose event to the window, to mark that it now has received an expose.
        // But some parts of Qt (mis)use this private member to check whether the
        // window has been mapped yet, which they do in code that is triggered
        // by the very same expose event we send below. To keep the code working
        // we need to set the variable up front, until the code has been fixed.
        p->receivedExpose = true;
    }
 
    // If the platform does not send paint events we need to synthesize them from expose events
    const bool shouldSynthesizePaintEvents = !platformIntegration()->hasCapability(QPlatformIntegration::PaintEvents);
 
    const bool wasExposed = p->exposed;
    p->exposed = e->isExposed && window->screen();
 
    // We treat expose events for an already exposed window as paint events
    if (wasExposed && p->exposed && shouldSynthesizePaintEvents) {
        QPaintEvent paintEvent(e->region);
        QCoreApplication::sendSpontaneousEvent(window, &paintEvent);
        if (paintEvent.isAccepted())
            return; // No need to send expose
 
        // The paint event was not accepted, so we fall through and send an expose
        // event instead, to maintain compatibility for clients that haven't adopted
        // paint events yet.
    }
 
    QExposeEvent exposeEvent(e->region);
    QCoreApplication::sendSpontaneousEvent(window, &exposeEvent);
    e->eventAccepted = exposeEvent.isAccepted();
 
    // If the window was just exposed we also need to send a paint event,
    // so that clients that implement paint events will draw something.
    // Note that we we can not skip this based on the expose event being
    // accepted, as clients may implement exposeEvent to track the state
    // change, but without drawing anything.
    if (!wasExposed && p->exposed && shouldSynthesizePaintEvents) {
        QPaintEvent paintEvent(e->region);
        QCoreApplication::sendSpontaneousEvent(window, &paintEvent);
    }
}
 
void QGuiApplicationPrivate::processPaintEvent(QWindowSystemInterfacePrivate::PaintEvent *e)
{
    Q_ASSERT_X(platformIntegration()->hasCapability(QPlatformIntegration::PaintEvents), "QGuiApplication",
        "The platform sent paint events without claiming support for it in QPlatformIntegration::capabilities()");
 
    if (!e->window)
        return;
 
    QPaintEvent paintEvent(e->region);
    QCoreApplication::sendSpontaneousEvent(e->window, &paintEvent);
 
    // We report back the accepted state to the platform, so that it can
    // decide when the best time to send the fallback expose event is.
    e->eventAccepted = paintEvent.isAccepted();
}
 
#if QT_CONFIG(draganddrop)
 
static void updateMouseAndModifierButtonState(Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers)
{
    QGuiApplicationPrivate::mouse_buttons = buttons;
    QGuiApplicationPrivate::modifier_buttons = modifiers;
}
 
QPlatformDragQtResponse QGuiApplicationPrivate::processDrag(QWindow *w, const QMimeData *dropData,
                                                            const QPoint &p, Qt::DropActions supportedActions,
                                                            Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers)
{
    updateMouseAndModifierButtonState(buttons, modifiers);
 
    static Qt::DropAction lastAcceptedDropAction = Qt::IgnoreAction;
    QPlatformDrag *platformDrag = platformIntegration()->drag();
    if (!platformDrag || (w && w->d_func()->blockedByModalWindow)) {
        lastAcceptedDropAction = Qt::IgnoreAction;
        return QPlatformDragQtResponse(false, lastAcceptedDropAction, QRect());
    }
 
    if (!dropData) {
        currentDragWindow = nullptr;
        QDragLeaveEvent e;
        QGuiApplication::sendEvent(w, &e);
        lastAcceptedDropAction = Qt::IgnoreAction;
        return QPlatformDragQtResponse(false, lastAcceptedDropAction, QRect());
    }
    QDragMoveEvent me(p, supportedActions, dropData, buttons, modifiers);
 
    if (w != currentDragWindow) {
        lastAcceptedDropAction = Qt::IgnoreAction;
        if (currentDragWindow) {
            QDragLeaveEvent e;
            QGuiApplication::sendEvent(currentDragWindow, &e);
        }
        currentDragWindow = w;
        QDragEnterEvent e(p, supportedActions, dropData, buttons, modifiers);
        QGuiApplication::sendEvent(w, &e);
        if (e.isAccepted() && e.dropAction() != Qt::IgnoreAction)
            lastAcceptedDropAction = e.dropAction();
    }
 
    // Handling 'DragEnter' should suffice for the application.
    if (lastAcceptedDropAction != Qt::IgnoreAction
        && (supportedActions & lastAcceptedDropAction)) {
        me.setDropAction(lastAcceptedDropAction);
        me.accept();
    }
    QGuiApplication::sendEvent(w, &me);
    lastAcceptedDropAction = me.isAccepted() ?
                             me.dropAction() :  Qt::IgnoreAction;
    return QPlatformDragQtResponse(me.isAccepted(), lastAcceptedDropAction, me.answerRect());
}
 
QPlatformDropQtResponse QGuiApplicationPrivate::processDrop(QWindow *w, const QMimeData *dropData,
                                                            const QPoint &p, Qt::DropActions supportedActions,
                                                            Qt::MouseButtons buttons, Qt::KeyboardModifiers modifiers)
{
    updateMouseAndModifierButtonState(buttons, modifiers);
 
    currentDragWindow = nullptr;
 
    QDropEvent de(p, supportedActions, dropData, buttons, modifiers);
    QGuiApplication::sendEvent(w, &de);
 
    Qt::DropAction acceptedAction = de.isAccepted() ? de.dropAction() : Qt::IgnoreAction;
    QPlatformDropQtResponse response(de.isAccepted(),acceptedAction);
    return response;
}
 
#endif // QT_CONFIG(draganddrop)
 
#ifndef QT_NO_CLIPBOARD
QClipboard * QGuiApplication::clipboard()
{
    if (QGuiApplicationPrivate::qt_clipboard == nullptr) {
        if (!qApp) {
            qWarning("QGuiApplication: Must construct a QGuiApplication before accessing a QClipboard");
            return nullptr;
        }
        QGuiApplicationPrivate::qt_clipboard = new QClipboard(nullptr);
    }
    return QGuiApplicationPrivate::qt_clipboard;
}
#endif
 
QPalette QGuiApplication::palette()
{
    if (!QGuiApplicationPrivate::app_pal)
        QGuiApplicationPrivate::updatePalette();
 
    return *QGuiApplicationPrivate::app_pal;
}
 
void QGuiApplicationPrivate::updatePalette()
{
    if (app_pal) {
        if (setPalette(*app_pal) && qGuiApp)
            qGuiApp->d_func()->handlePaletteChanged();
    } else {
        setPalette(QPalette());
    }
}
 
void QGuiApplicationPrivate::clearPalette()
{
    delete app_pal;
    app_pal = nullptr;
}
 
void QGuiApplication::setPalette(const QPalette &pal)
{
    if (QGuiApplicationPrivate::setPalette(pal) && qGuiApp)
        qGuiApp->d_func()->handlePaletteChanged();
}
 
bool QGuiApplicationPrivate::setPalette(const QPalette &palette)
{
    // Resolve the palette against the theme palette, filling in
    // any missing roles, while keeping the original resolve mask.
    QPalette basePalette = qGuiApp ? qGuiApp->d_func()->basePalette() : Qt::gray;
    basePalette.setResolveMask(0); // The base palette only contributes missing colors roles
    QPalette resolvedPalette = palette.resolve(basePalette);
 
    if (app_pal && resolvedPalette == *app_pal && resolvedPalette.resolveMask() == app_pal->resolveMask())
        return false;
 
    if (!app_pal)
        app_pal = new QPalette(resolvedPalette);
    else
        *app_pal = resolvedPalette;
 
    QCoreApplication::setAttribute(Qt::AA_SetPalette, app_pal->resolveMask() != 0);
 
    return true;
}
 
/*
    Returns the base palette used to fill in missing roles in
    the current application palette.
 
    Normally this is the theme palette, but QApplication
    overrides this for compatibility reasons.
*/
QPalette QGuiApplicationPrivate::basePalette() const
{
    return platformTheme() ? *platformTheme()->palette() : Qt::gray;
}
 
void QGuiApplicationPrivate::handlePaletteChanged(const char *className)
{
#if QT_DEPRECATED_SINCE(6, 0)
    if (!className) {
        Q_ASSERT(app_pal);
QT_WARNING_PUSH
QT_WARNING_DISABLE_DEPRECATED
        emit qGuiApp->paletteChanged(*QGuiApplicationPrivate::app_pal);
QT_WARNING_POP
    }
#else
    Q_UNUSED(className);
#endif // QT_DEPRECATED_SINCE(6, 0)
 
    if (is_app_running && !is_app_closing) {
        QEvent event(QEvent::ApplicationPaletteChange);
        QGuiApplication::sendEvent(qGuiApp, &event);
    }
}
 
void QGuiApplicationPrivate::applyWindowGeometrySpecificationTo(QWindow *window)
{
    windowGeometrySpecification.applyTo(window);
}
 
QFont QGuiApplication::font()
{
    const auto locker = qt_scoped_lock(applicationFontMutex);
    if (!QGuiApplicationPrivate::self && !QGuiApplicationPrivate::app_font) {
        qWarning("QGuiApplication::font(): no QGuiApplication instance and no application font set.");
        return QFont();  // in effect: QFont((QFontPrivate*)nullptr), so no recursion
    }
    initFontUnlocked();
    return *QGuiApplicationPrivate::app_font;
}
 
void QGuiApplication::setFont(const QFont &font)
{
    auto locker = qt_unique_lock(applicationFontMutex);
    const bool emitChange = !QGuiApplicationPrivate::app_font
                            || (*QGuiApplicationPrivate::app_font != font);
    if (!QGuiApplicationPrivate::app_font)
        QGuiApplicationPrivate::app_font = new QFont(font);
    else
        *QGuiApplicationPrivate::app_font = font;
    applicationResourceFlags |= ApplicationFontExplicitlySet;
 
    if (emitChange && qGuiApp) {
        auto font = *QGuiApplicationPrivate::app_font;
        locker.unlock();
#if QT_DEPRECATED_SINCE(6, 0)
QT_WARNING_PUSH
QT_WARNING_DISABLE_DEPRECATED
        emit qGuiApp->fontChanged(font);
QT_WARNING_POP
#else
        Q_UNUSED(font);
#endif // QT_DEPRECATED_SINCE(6, 0)
        QEvent event(QEvent::ApplicationFontChange);
        QGuiApplication::sendEvent(qGuiApp, &event);
    }
}
 
void QGuiApplicationPrivate::notifyLayoutDirectionChange()
{
    const QWindowList list = QGuiApplication::topLevelWindows();
    for (int i = 0; i < list.size(); ++i) {
        QEvent ev(QEvent::ApplicationLayoutDirectionChange);
        QCoreApplication::sendEvent(list.at(i), &ev);
    }
}
 
void QGuiApplicationPrivate::notifyActiveWindowChange(QWindow *prev)
{
    if (prev) {
        QEvent de(QEvent::WindowDeactivate);
        QCoreApplication::sendEvent(prev, &de);
    }
    if (self->focus_window) {
        QEvent ae(QEvent::WindowActivate);
        QCoreApplication::sendEvent(focus_window, &ae);
    }
}
 
QIcon QGuiApplication::windowIcon()
{
    return QGuiApplicationPrivate::app_icon ? *QGuiApplicationPrivate::app_icon : QIcon();
}
 
void QGuiApplication::setWindowIcon(const QIcon &icon)
{
    if (!QGuiApplicationPrivate::app_icon)
        QGuiApplicationPrivate::app_icon = new QIcon();
    *QGuiApplicationPrivate::app_icon = icon;
    if (QGuiApplicationPrivate::platform_integration
            && QGuiApplicationPrivate::platform_integration->hasCapability(QPlatformIntegration::ApplicationIcon))
        QGuiApplicationPrivate::platform_integration->setApplicationIcon(icon);
    if (QGuiApplicationPrivate::is_app_running && !QGuiApplicationPrivate::is_app_closing)
        QGuiApplicationPrivate::self->notifyWindowIconChanged();
}
 
void QGuiApplicationPrivate::notifyWindowIconChanged()
{
    QEvent ev(QEvent::ApplicationWindowIconChange);
    const QWindowList list = QGuiApplication::topLevelWindows();
    for (int i = 0; i < list.size(); ++i)
        QCoreApplication::sendEvent(list.at(i), &ev);
}
 
 
 
void QGuiApplication::setQuitOnLastWindowClosed(bool quit)
{
    QGuiApplicationPrivate::quitOnLastWindowClosed = quit;
}
 
bool QGuiApplication::quitOnLastWindowClosed()
{
    return QGuiApplicationPrivate::quitOnLastWindowClosed;
}
 
void QGuiApplicationPrivate::maybeLastWindowClosed()
{
    if (!lastWindowClosed())
        return;
 
    if (in_exec)
        emit q_func()->lastWindowClosed();
 
    if (quitOnLastWindowClosed && canQuitAutomatically())
        quitAutomatically();
}
 
bool QGuiApplicationPrivate::lastWindowClosed() const
{
    for (auto *window : QGuiApplication::topLevelWindows()) {
        auto *windowPrivate = qt_window_private(window);
        if (!windowPrivate->participatesInLastWindowClosed())
            continue;
 
        if (windowPrivate->treatAsVisible())
            return false;
     }
 
     return true;
}
 
bool QGuiApplicationPrivate::canQuitAutomatically()
{
    if (quitOnLastWindowClosed && !lastWindowClosed())
        return false;
 
    return QCoreApplicationPrivate::canQuitAutomatically();
}
 
void QGuiApplicationPrivate::quit()
{
    if (auto *platformIntegration = QGuiApplicationPrivate::platformIntegration())
        platformIntegration->quit();
    else
        QCoreApplicationPrivate::quit();
}
 
void QGuiApplicationPrivate::processApplicationTermination(QWindowSystemInterfacePrivate::WindowSystemEvent *windowSystemEvent)
{
    QEvent event(QEvent::Quit);
    QGuiApplication::sendSpontaneousEvent(QGuiApplication::instance(), &event);
    windowSystemEvent->eventAccepted = event.isAccepted();
}
 
Qt::ApplicationState QGuiApplication::applicationState()
{
    return QGuiApplicationPrivate::applicationState;
}
 
void QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy policy)
{
    QGuiApplicationPrivate::highDpiScaleFactorRoundingPolicy = policy;
}
 
Qt::HighDpiScaleFactorRoundingPolicy QGuiApplication::highDpiScaleFactorRoundingPolicy()
{
    return QGuiApplicationPrivate::highDpiScaleFactorRoundingPolicy;
}
 
void QGuiApplicationPrivate::setApplicationState(Qt::ApplicationState state, bool forcePropagate)
{
    if ((applicationState == state) && !forcePropagate)
        return;
 
    applicationState = state;
 
    switch (state) {
    case Qt::ApplicationActive: {
        QEvent appActivate(QEvent::ApplicationActivate);
        QCoreApplication::sendSpontaneousEvent(qApp, &appActivate);
        break; }
    case Qt::ApplicationInactive: {
        QEvent appDeactivate(QEvent::ApplicationDeactivate);
        QCoreApplication::sendSpontaneousEvent(qApp, &appDeactivate);
        break; }
    default:
        break;
    }
 
    QApplicationStateChangeEvent event(applicationState);
    QCoreApplication::sendSpontaneousEvent(qApp, &event);
 
    emit qApp->applicationStateChanged(applicationState);
}
 
#ifndef QT_NO_SESSIONMANAGER
bool QGuiApplication::isSessionRestored() const
{
    Q_D(const QGuiApplication);
    return d->is_session_restored;
}
 
QString QGuiApplication::sessionId() const
{
    Q_D(const QGuiApplication);
    return d->session_manager->sessionId();
}
 
QString QGuiApplication::sessionKey() const
{
    Q_D(const QGuiApplication);
    return d->session_manager->sessionKey();
}
 
bool QGuiApplication::isSavingSession() const
{
    Q_D(const QGuiApplication);
    return d->is_saving_session;
}
 
void QGuiApplicationPrivate::commitData()
{
    Q_Q(QGuiApplication);
    is_saving_session = true;
    emit q->commitDataRequest(*session_manager);
    is_saving_session = false;
}
 
 
void QGuiApplicationPrivate::saveState()
{
    Q_Q(QGuiApplication);
    is_saving_session = true;
    emit q->saveStateRequest(*session_manager);
    is_saving_session = false;
}
#endif //QT_NO_SESSIONMANAGER
 
void QGuiApplication::sync()
{
    QCoreApplication::processEvents();
    if (QGuiApplicationPrivate::platform_integration
            && QGuiApplicationPrivate::platform_integration->hasCapability(QPlatformIntegration::SyncState)) {
        QGuiApplicationPrivate::platform_integration->sync();
        QCoreApplication::processEvents();
        QWindowSystemInterface::flushWindowSystemEvents();
    }
}
 
void QGuiApplication::setLayoutDirection(Qt::LayoutDirection direction)
{
    layout_direction = direction;
    if (direction == Qt::LayoutDirectionAuto)
        direction = qt_detectRTLLanguage() ? Qt::RightToLeft : Qt::LeftToRight;
 
    // no change to the explicitly set or auto-detected layout direction
    if (direction == effective_layout_direction)
        return;
 
    effective_layout_direction = direction;
    if (qGuiApp) {
        emit qGuiApp->layoutDirectionChanged(direction);
        QGuiApplicationPrivate::self->notifyLayoutDirectionChange();
    }
}
 
Qt::LayoutDirection QGuiApplication::layoutDirection()
{
    /*
        effective_layout_direction defaults to Qt::LeftToRight, and is updated with what is
        auto-detected by a call to setLayoutDirection(Qt::LayoutDirectionAuto). This happens in
        QGuiApplicationPrivate::init and when the language changes (or before if the application
        calls the static function, but then no translators are installed so the auto-detection
        always yields Qt::LeftToRight).
        So we can be certain that it's always the right value.
    */
    return effective_layout_direction;
}
 
#ifndef QT_NO_CURSOR
QCursor *QGuiApplication::overrideCursor()
{
    CHECK_QAPP_INSTANCE(nullptr)
    return qGuiApp->d_func()->cursor_list.isEmpty() ? nullptr : &qGuiApp->d_func()->cursor_list.first();
}
 
void QGuiApplication::changeOverrideCursor(const QCursor &cursor)
{
    CHECK_QAPP_INSTANCE()
    if (qGuiApp->d_func()->cursor_list.isEmpty())
        return;
    qGuiApp->d_func()->cursor_list.removeFirst();
    setOverrideCursor(cursor);
}
#endif
 
 
#ifndef QT_NO_CURSOR
static inline void applyCursor(QWindow *w, QCursor c)
{
    if (const QScreen *screen = w->screen())
        if (QPlatformCursor *cursor = screen->handle()->cursor())
            cursor->changeCursor(&c, w);
}
 
static inline void unsetCursor(QWindow *w)
{
    if (const QScreen *screen = w->screen())
        if (QPlatformCursor *cursor = screen->handle()->cursor())
            cursor->changeCursor(nullptr, w);
}
 
static inline void applyCursor(const QList<QWindow *> &l, const QCursor &c)
{
    for (int i = 0; i < l.size(); ++i) {
        QWindow *w = l.at(i);
        if (w->handle() && w->type() != Qt::Desktop)
            applyCursor(w, c);
    }
}
 
static inline void applyOverrideCursor(const QList<QScreen *> &screens, const QCursor &c)
{
    for (QScreen *screen : screens) {
        if (QPlatformCursor *cursor = screen->handle()->cursor())
            cursor->setOverrideCursor(c);
    }
}
 
static inline void clearOverrideCursor(const QList<QScreen *> &screens)
{
    for (QScreen *screen : screens) {
        if (QPlatformCursor *cursor = screen->handle()->cursor())
            cursor->clearOverrideCursor();
    }
}
 
static inline void applyWindowCursor(const QList<QWindow *> &l)
{
    for (int i = 0; i < l.size(); ++i) {
        QWindow *w = l.at(i);
        if (w->handle() && w->type() != Qt::Desktop) {
            if (qt_window_private(w)->hasCursor) {
                applyCursor(w, w->cursor());
            } else {
                unsetCursor(w);
            }
        }
    }
}
 
void QGuiApplication::setOverrideCursor(const QCursor &cursor)
{
    CHECK_QAPP_INSTANCE()
    qGuiApp->d_func()->cursor_list.prepend(cursor);
    if (QPlatformCursor::capabilities().testFlag(QPlatformCursor::OverrideCursor))
        applyOverrideCursor(QGuiApplicationPrivate::screen_list, cursor);
    else
        applyCursor(QGuiApplicationPrivate::window_list, cursor);
}
 
void QGuiApplication::restoreOverrideCursor()
{
    CHECK_QAPP_INSTANCE()
    if (qGuiApp->d_func()->cursor_list.isEmpty())
        return;
    qGuiApp->d_func()->cursor_list.removeFirst();
    if (qGuiApp->d_func()->cursor_list.size() > 0) {
        QCursor c(qGuiApp->d_func()->cursor_list.value(0));
        if (QPlatformCursor::capabilities().testFlag(QPlatformCursor::OverrideCursor))
            applyOverrideCursor(QGuiApplicationPrivate::screen_list, c);
        else
            applyCursor(QGuiApplicationPrivate::window_list, c);
    } else {
        if (QPlatformCursor::capabilities().testFlag(QPlatformCursor::OverrideCursor))
            clearOverrideCursor(QGuiApplicationPrivate::screen_list);
        applyWindowCursor(QGuiApplicationPrivate::window_list);
    }
}
#endif// QT_NO_CURSOR
 
QStyleHints *QGuiApplication::styleHints()
{
    if (!QGuiApplicationPrivate::styleHints)
        QGuiApplicationPrivate::styleHints = new QStyleHints();
    return QGuiApplicationPrivate::styleHints;
}
 
void QGuiApplication::setDesktopSettingsAware(bool on)
{
    QGuiApplicationPrivate::obey_desktop_settings = on;
}
 
bool QGuiApplication::desktopSettingsAware()
{
    return QGuiApplicationPrivate::obey_desktop_settings;
}
 
QInputMethod *QGuiApplication::inputMethod()
{
    CHECK_QAPP_INSTANCE(nullptr)
    if (!qGuiApp->d_func()->inputMethod)
        qGuiApp->d_func()->inputMethod = new QInputMethod();
    return qGuiApp->d_func()->inputMethod;
}
 
QPixmap QGuiApplicationPrivate::getPixmapCursor(Qt::CursorShape cshape)
{
    Q_UNUSED(cshape);
    return QPixmap();
}
 
QPoint QGuiApplicationPrivate::QLastCursorPosition::toPoint() const noexcept
{
    // Guard against the default initialization of qInf() (avoid UB or SIGFPE in conversion).
    if (Q_UNLIKELY(qIsInf(thePoint.x())))
        return QPoint(std::numeric_limits<int>::max(), std::numeric_limits<int>::max());
    return thePoint.toPoint();
}
 
#if QT_CONFIG(draganddrop)
void QGuiApplicationPrivate::notifyDragStarted(const QDrag *drag)
{
    Q_UNUSED(drag);
 
}
#endif
 
const QColorTrcLut *QGuiApplicationPrivate::colorProfileForA8Text()
{
#ifdef Q_OS_WIN
    if (!m_a8ColorProfile)
        m_a8ColorProfile = QColorTrcLut::fromGamma(2.31); // This is a hard-coded thing for Windows text rendering
    return m_a8ColorProfile.get();
#else
    return colorProfileForA32Text();
#endif
}
 
const QColorTrcLut *QGuiApplicationPrivate::colorProfileForA32Text()
{
    if (!m_a32ColorProfile)
        m_a32ColorProfile = QColorTrcLut::fromGamma(fontSmoothingGamma);
    return m_a32ColorProfile.get();
}
 
void QGuiApplicationPrivate::_q_updateFocusObject(QObject *object)
{
    Q_Q(QGuiApplication);
 
    QPlatformInputContext *inputContext = platformIntegration()->inputContext();
    const bool enabled = inputContext && QInputMethodPrivate::objectAcceptsInputMethod(object);
 
    QPlatformInputContextPrivate::setInputMethodAccepted(enabled);
    if (inputContext)
        inputContext->setFocusObject(object);
    emit q->focusObjectChanged(object);
}
 
enum MouseMasks {
    MouseCapsMask = 0xFF,
    MouseSourceMaskDst = 0xFF00,
    MouseSourceMaskSrc = MouseCapsMask,
    MouseSourceShift = 8,
    MouseFlagsCapsMask = 0xFF0000,
    MouseFlagsShift = 16
};
 
QInputDeviceManager *QGuiApplicationPrivate::inputDeviceManager()
{
    Q_ASSERT(QGuiApplication::instance());
 
    if (!m_inputDeviceManager)
        m_inputDeviceManager = new QInputDeviceManager(QGuiApplication::instance());
 
    return m_inputDeviceManager;
}
 
void *QGuiApplication::resolveInterface(const char *name, int revision) const
{
    using namespace QNativeInterface;
    using namespace QNativeInterface::Private;
 
    auto *platformIntegration = QGuiApplicationPrivate::platformIntegration();
    Q_UNUSED(platformIntegration);
 
#if defined(Q_OS_WIN)
    QT_NATIVE_INTERFACE_RETURN_IF(QWindowsApplication, platformIntegration);
#endif
#if QT_CONFIG(xcb)
    QT_NATIVE_INTERFACE_RETURN_IF(QX11Application, platformNativeInterface());
#endif
#if defined(Q_OS_UNIX)
    QT_NATIVE_INTERFACE_RETURN_IF(QWaylandApplication, platformNativeInterface());
#endif
 
    return QCoreApplication::resolveInterface(name, revision);
}
 
QT_END_NAMESPACE
 
#include "moc_qguiapplication.cpp"