C++ QPlatformIntegration类代码示例

void QWaylandDisplay::displayHandleGlobal(uint32_t id,
        const QByteArray &interface,
        uint32_t version)
{
    Q_UNUSED(version);
    if (interface == "wl_output") {
        struct wl_output *output = wl_output_create(mDisplay, id, 1);
        wl_output_add_listener(output, &outputListener, this);
    } else if (interface == "wl_compositor") {
        mCompositor = wl_compositor_create(mDisplay, id, 1);
        wl_compositor_add_listener(mCompositor,
                                   &compositorListener, this);
    } else if (interface == "wl_shm") {
        mShm = wl_shm_create(mDisplay, id, 1);
    } else if (interface == "wl_shell") {
        mShell = wl_shell_create(mDisplay, id, 1);
        wl_shell_add_listener(mShell, &shellListener, this);
    } else if (interface == "wl_input_device") {
        QWaylandInputDevice *inputDevice =
            new QWaylandInputDevice(mDisplay, id);
        mInputDevices.append(inputDevice);
    } else if (interface == "wl_selection_offer") {
        QPlatformIntegration *plat = QApplicationPrivate::platformIntegration();
        QWaylandClipboard *clipboard = static_cast<QWaylandClipboard *>(plat->clipboard());
        clipboard->createSelectionOffer(id);
    }
}

void DisplayManagerRPI::resetRendering()
{
  QGuiApplication *guiApp = (QGuiApplication*)QGuiApplication::instance();
  QQuickWindow *window = (QQuickWindow*)guiApp->focusWindow();
  if (window)
  {
    QLOG_INFO() << "Recreating Qt UI renderer";

    // destroy the window to reset  OpenGL context
    window->setPersistentOpenGLContext(false);
    window->setPersistentSceneGraph(false);
    window->destroy();

    // Grab the Platform integration private object and recreate it
    // this allows to clean / recreate the dispmanx objects
    QGuiApplicationPrivate *privateApp = (QGuiApplicationPrivate *)QGuiApplicationPrivate::get(guiApp);
    QPlatformIntegration *integration = privateApp->platformIntegration();

    if (integration)
    {
      integration->destroy();
      QThread::msleep(500);
      integration->initialize();
    }
    else
    {
      QLOG_ERROR() << "Failed to retrieve platform integration";
    }

    // now recreate the window OpenGL context
    window->setScreen(QGuiApplication::primaryScreen());
    window->create();
  }
}

QPlatformScreen * QPlatformScreen::platformScreenForWidget(const QWidget *widget)
{
    QWidget *window = widget->window();
    QWidgetPrivate *windowPrivate = qt_widget_private(window);
    QTLWExtra * topData = windowPrivate->topData();
    QPlatformIntegration *integration =
            QApplicationPrivate::platformIntegration();
    return integration->screens()[topData->screenIndex];
}

void tst_QQuickAccessible::initTestCase()
{
    QQmlDataTest::initTestCase();
    QTestAccessibility::initialize();
    QPlatformIntegration *pfIntegration = QGuiApplicationPrivate::platformIntegration();
    if (!pfIntegration->accessibility())
        QSKIP("This platform does not support accessibility");
    pfIntegration->accessibility()->setActive(true);
}

int QDesktopWidget::screenNumber(const QPoint &p) const
{
    QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
    QList<QPlatformScreen *> screens = pi->screens();

    for (int i = 0; i < screens.size(); ++i)
        if (screens[i]->geometry().contains(p))
            return i;

    return primaryScreen(); //even better would be closest screen
}

const QRect QDesktopWidget::screenGeometry(int screenNo) const
{
    QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
    QList<QPlatformScreen *> screens = pi->screens();
    if (screenNo == -1)
        screenNo = 0;
    if (screenNo < 0 || screenNo >= screens.size())
        return QRect();
    else
        return screens[screenNo]->geometry();
}

/*!
    Factory function for scene graph backends of the distance-field glyph cache.
 */
QSGDistanceFieldGlyphCache *QSGContext::distanceFieldGlyphCache(const QRawFont &font)
{
    Q_D(QSGContext);

    if (!d->distanceFieldCacheManager)
        d->distanceFieldCacheManager = new QSGDistanceFieldGlyphCacheManager;

    QSGDistanceFieldGlyphCache *cache = d->distanceFieldCacheManager->cache(font);
    if (!cache) {
        QPlatformIntegration *platformIntegration = QGuiApplicationPrivate::platformIntegration();
        if (platformIntegration != 0
            && platformIntegration->hasCapability(QPlatformIntegration::SharedGraphicsCache)) {
            QFontEngine *fe = QRawFontPrivate::get(font)->fontEngine;
            if (!fe->faceId().filename.isEmpty()) {
                QByteArray keyName = fe->faceId().filename;
                if (font.style() != QFont::StyleNormal)
                    keyName += QByteArray(" I");
                if (font.weight() != QFont::Normal)
                    keyName += ' ' + QByteArray::number(font.weight());
                keyName += QByteArray(" DF");
                QPlatformSharedGraphicsCache *sharedGraphicsCache =
                        platformIntegration->createPlatformSharedGraphicsCache(keyName);

                if (sharedGraphicsCache != 0) {
                    sharedGraphicsCache->ensureCacheInitialized(keyName,
                                                                QPlatformSharedGraphicsCache::OpenGLTexture,
                                                                QPlatformSharedGraphicsCache::Alpha8);

                    cache = new QSGSharedDistanceFieldGlyphCache(keyName,
                                                                sharedGraphicsCache,
                                                                d->distanceFieldCacheManager,
                                                                glContext(),
                                                                font);
                }
            }
        }
        if (!cache)
            cache = new QSGDefaultDistanceFieldGlyphCache(d->distanceFieldCacheManager, glContext(), font);
        d->distanceFieldCacheManager->insertCache(font, cache);
    }
    return cache;
}

QWidget *QApplication::topLevelAt(const QPoint &pos)
{
    QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();

    QList<QPlatformScreen *> screens = pi->screens();
    QList<QPlatformScreen *>::const_iterator screen = screens.constBegin();
    QList<QPlatformScreen *>::const_iterator end = screens.constEnd();

    // The first screen in a virtual environment should know about all top levels
    if (pi->isVirtualDesktop()) {
        QWidget *w = (*screen)->topLevelAt(pos);
        return w;
    }

    while (screen != end) {
        if ((*screen)->geometry().contains(pos))
            return (*screen)->topLevelAt(pos);
        ++screen;
    }
    return 0;
}

/*!
    \internal
*/
QPlatformNativeInterface *QApplication::platformNativeInterface()
{
    QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
    return pi->nativeInterface();
}

void QXlibScreen::handleSelectionRequest(XEvent *event)
{
    QPlatformIntegration *integration = QApplicationPrivate::platformIntegration();
    QXlibClipboard *clipboard = static_cast<QXlibClipboard *>(integration->clipboard());
    clipboard->handleSelectionRequest(event);
}

void QWidgetPrivate::setGeometry_sys(int x, int y, int w, int h, bool isMove)
{
    Q_Q(QWidget);
    if (extra) {                                // any size restrictions?
        w = qMin(w,extra->maxw);
        h = qMin(h,extra->maxh);
        w = qMax(w,extra->minw);
        h = qMax(h,extra->minh);
    }

    if (q->isWindow() && q->windowHandle()) {
        QPlatformIntegration *integration = QGuiApplicationPrivate::platformIntegration();
        if (!integration->hasCapability(QPlatformIntegration::NonFullScreenWindows)) {
            x = 0;
            y = 0;
            w = q->windowHandle()->width();
            h = q->windowHandle()->height();
        }
    }

    QPoint oldp = q->geometry().topLeft();
    QSize olds = q->size();
    QRect r(x, y, w, h);

    bool isResize = olds != r.size();
    isMove = oldp != r.topLeft(); //### why do we have isMove as a parameter?


    // We only care about stuff that changes the geometry, or may
    // cause the window manager to change its state
    if (r.size() == olds && oldp == r.topLeft())
        return;

    if (!data.in_set_window_state) {
        q->data->window_state &= ~Qt::WindowMaximized;
        q->data->window_state &= ~Qt::WindowFullScreen;
        if (q->isWindow())
            topData()->normalGeometry = QRect(0, 0, -1, -1);
    }

    QPoint oldPos = q->pos();
    data.crect = r;

    bool needsShow = false;

    if (!(data.window_state & Qt::WindowFullScreen) && (w == 0 || h == 0)) {
        q->setAttribute(Qt::WA_OutsideWSRange, true);
        if (q->isVisible() && q->testAttribute(Qt::WA_Mapped))
            hide_sys();
        data.crect = QRect(x, y, w, h);
    } else if (q->isVisible() && q->testAttribute(Qt::WA_OutsideWSRange)) {
        q->setAttribute(Qt::WA_OutsideWSRange, false);
        needsShow = true;
    }

    if (q->isVisible()) {
        if (!q->testAttribute(Qt::WA_DontShowOnScreen) && !q->testAttribute(Qt::WA_OutsideWSRange)) {
            if (q->windowHandle()) {
                if (q->isWindow()) {
                    q->windowHandle()->setGeometry(q->geometry());
                } else {
                    QPoint posInNativeParent =  q->mapTo(q->nativeParentWidget(),QPoint());
                    q->windowHandle()->setGeometry(QRect(posInNativeParent,r.size()));
                }
                const QWidgetBackingStore *bs = maybeBackingStore();
                if (bs && bs->store) {
                    if (isResize)
                        bs->store->resize(r.size());
                }

                if (needsShow)
                    show_sys();
            }

            if (!q->isWindow()) {
                if (isMove && !isResize)
                    moveRect(QRect(oldPos, olds), x - oldPos.x(), y - oldPos.y());
                else
                    invalidateBuffer_resizeHelper(oldPos, olds);
            }
        }

        if (isMove) {
            QMoveEvent e(q->pos(), oldPos);
            QApplication::sendEvent(q, &e);
        }
        if (isResize) {
            QResizeEvent e(r.size(), olds);
            QApplication::sendEvent(q, &e);
            if (q->windowHandle())
                q->update();
        }
    } else { // not visible
        if (isMove && q->pos() != oldPos)
            q->setAttribute(Qt::WA_PendingMoveEvent, true);
        if (isResize)
            q->setAttribute(Qt::WA_PendingResizeEvent, true);
    }

}

int QDesktopWidget::numScreens() const
{
    QPlatformIntegration *pi = QApplicationPrivate::platformIntegration();
    return qMax(pi->screens().size(), 1);
}