C++ QScreen::width方法代码示例

QPixmap QPixmap::grabWindow(WId window, int x, int y, int w, int h)
{
    QWidget *widget = QWidget::find(window);
    if (!widget)
        return QPixmap();

    QRect grabRect = widget->frameGeometry();
    if (!widget->isWindow())
        grabRect.translate(widget->parentWidget()->mapToGlobal(QPoint()));
    if (w < 0)
        w = widget->width() - x;
    if (h < 0)
        h = widget->height() - y;
    grabRect &= QRect(x, y, w, h).translated(widget->mapToGlobal(QPoint()));

    QScreen *screen = qt_screen;
    QDesktopWidget *desktop = QApplication::desktop();
    if (!desktop)
        return QPixmap();
    if (desktop->numScreens() > 1) {
        const int screenNo = desktop->screenNumber(widget);
        if (screenNo != -1)
            screen = qt_screen->subScreens().at(screenNo);
        grabRect = grabRect.translated(-screen->region().boundingRect().topLeft());
    }

    if (screen->pixelFormat() == QImage::Format_Invalid) {
        qWarning("QPixmap::grabWindow(): Unable to copy pixels from framebuffer");
        return QPixmap();
    }

    if (screen->isTransformed()) {
        const QSize screenSize(screen->width(), screen->height());
        grabRect = screen->mapToDevice(grabRect, screenSize);
    }

    QWSDisplay::grab(false);
    QPixmap pixmap;
    QImage img(screen->base(),
               screen->deviceWidth(), screen->deviceHeight(),
               screen->linestep(), screen->pixelFormat());
    img = img.copy(grabRect);
    QWSDisplay::ungrab();

    if (screen->isTransformed()) {
        QMatrix matrix;
        switch (screen->transformOrientation()) {
        case 1: matrix.rotate(90); break;
        case 2: matrix.rotate(180); break;
        case 3: matrix.rotate(270); break;
        default: break;
        }
        img = img.transformed(matrix);
    }

    if (screen->pixelType() == QScreen::BGRPixel)
        img = img.rgbSwapped();

    return QPixmap::fromImage(img);
}

static inline QSize screenS()
{
    QScreen *screen = getPrimaryScreen();
    if (!screen)
        return QSize();
    return QSize(screen->width(), screen->height());
}

static inline void setImageMetrics(QImage &img, QWidget *window) {
    QScreen *myScreen = getScreen(window);
    if (myScreen) {
        int dpmx = myScreen->width()*1000 / myScreen->physicalWidth();
        int dpmy = myScreen->height()*1000 / myScreen->physicalHeight();
        img.setDotsPerMeterX(dpmx);
        img.setDotsPerMeterY(dpmy);
    }
}

void qt_directpainter_embedevent(QDirectPainter *dp, const QWSEmbedEvent *event)
{
    if (event->type | QWSEmbedEvent::Region) {
        QScreen *screen = dp->d_func()->surface->screen();
        QRegion r = event->region;
        if (screen->isTransformed()) {
            const QSize screenSize(screen->width(), screen->height());
            r = screen->mapToDevice(r, screenSize);
        }
        dp->setRegion(r);
    }
}

bool QMultiScreen::connect(const QString &displaySpec)
{
    QString dSpec = displaySpec;
    if (dSpec.startsWith(QLatin1String("Multi:"), Qt::CaseInsensitive))
        dSpec = dSpec.mid(QString::fromLatin1("Multi:").size());

    const QString displayIdSpec = QString::fromLatin1(" :%1").arg(displayId);
    if (dSpec.endsWith(displayIdSpec))
        dSpec = dSpec.left(dSpec.size() - displayIdSpec.size());

    QStringList specs = dSpec.split(QLatin1Char(' '), QString::SkipEmptyParts);
    foreach (QString spec, specs) {
        const int id = getDisplayId(spec);
        if (spec.startsWith("vnc:", Qt::CaseInsensitive)) {
            spec.append(":noDisablePainting");
        }
        const QPoint offset = filterDisplayOffset(spec);
        QScreen *s = qt_get_screen(id, spec.toLatin1().constData());
        s->setOffset(offset);
        addSubScreen(s);
    }

    QScreen *firstScreen = d_ptr->screens.at(0);
    Q_ASSERT(firstScreen);

    // XXX
    QScreen::d = firstScreen->depth();

    QScreen::lstep = 0;
    QScreen::data = 0;
    QScreen::size = 0;

    QScreen::w = d_ptr->region.boundingRect().width();
    QScreen::h = d_ptr->region.boundingRect().height();

    QScreen::dw = QScreen::w;
    QScreen::dh = QScreen::h;

    // XXX - Extend the physical size based on the first screen
    // to encompass all screens, so that code that uses the multi
    // screen to calculate dpi values will get the right numbers.
    QScreen::physWidth = firstScreen->physicalWidth() * w / firstScreen->width();
    QScreen::physHeight = firstScreen->physicalHeight() * h / firstScreen->height();

    // XXXXX
    qt_screen = this;

    return true;
}

void qt_directpainter_region(QDirectPainter *dp, const QRegion &alloc, int type)
{
    QDirectPainterPrivate *d = dp->d_func();

    QRegion r = alloc;
    QScreen *screen = d->surface->screen();
    if (screen->isTransformed()) {
        const QSize screenSize(screen->width(), screen->height());
        r = screen->mapToDevice(r, screenSize);
    }
    if (type == QWSRegionEvent::Allocation) {
        d->surface->setClipRegion(alloc);
        d->seenRegion = true;
        if (dp != QDirectPainterPrivate::staticPainter) {
            if (!d->surface->flushingRegionEvents) // recursion guard
                dp->regionChanged(r);
        }
    }
}