C++ QWindow::resize方法代码示例

void QWidgetPrivate::show_sys()
{
    Q_Q(QWidget);

    QWindow *window = q->windowHandle();

    if (q->testAttribute(Qt::WA_DontShowOnScreen)) {
        invalidateBuffer(q->rect());
        q->setAttribute(Qt::WA_Mapped);
        if (q->isWindow() && q->windowModality() != Qt::NonModal && window) {
            // add our window to the modal window list
            QGuiApplicationPrivate::showModalWindow(window);
        }
        return;
    }

    QApplication::postEvent(q, new QUpdateLaterEvent(q->rect()));

    if (!q->isWindow() && !q->testAttribute(Qt::WA_NativeWindow))
        return;

    if (window) {
        if (q->isWindow())
            fixPosIncludesFrame();
        QRect geomRect = q->geometry();
        if (!q->isWindow()) {
            QPoint topLeftOfWindow = q->mapTo(q->nativeParentWidget(),QPoint());
            geomRect.moveTopLeft(topLeftOfWindow);
        }
        const QRect windowRect = window->geometry();
        if (windowRect != geomRect) {
            if (q->testAttribute(Qt::WA_Moved))
                window->setGeometry(geomRect);
            else
                window->resize(geomRect.size());
        }

        if (QBackingStore *store = q->backingStore()) {
            if (store->size() != geomRect.size()) {
                store->resize(geomRect.size());
            }
        }

#ifndef QT_NO_CURSOR
        qt_qpa_set_cursor(q, false); // Needed in case cursor was set before show
#endif
        invalidateBuffer(q->rect());
        window->setVisible(true);
        // Was the window moved by the Window system or QPlatformWindow::initialGeometry() ?
        if (window->isTopLevel()) {
            const QPoint crectTopLeft = q->data->crect.topLeft();
            const QPoint windowTopLeft = window->geometry().topLeft();
            if (crectTopLeft == QPoint(0, 0) && windowTopLeft != crectTopLeft)
                q->data->crect.moveTopLeft(windowTopLeft);
        }
    }
}

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QSurfaceFormat format;
    format.setSamples(16);

    QWindow root;
    root.resize(640 * 2, 480);

    QQuickView viewL(&root);
    viewL.setFormat(format);
    viewL.setSource(QUrl("qrc:///qml/tst_qrc.qml"));
    viewL.setGeometry(0, 0, 640, 480);

    QQuickView viewR(&root);
    viewR.setFormat(format);
    viewR.setSource(QUrl("Qrc:///qml/tst_qrc.qml"));
    viewR.setGeometry(640, 0, 640, 480);

    root.show();

    return app.exec();
}

void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyOldWindow)
{
    Q_Q(QWidget);

    Q_UNUSED(window);
    Q_UNUSED(initializeWindow);
    Q_UNUSED(destroyOldWindow);

    Qt::WindowFlags flags = data.window_flags;

    if (!q->testAttribute(Qt::WA_NativeWindow) && !q->isWindow())
        return; // we only care about real toplevels

    QWindow *win = topData()->window;
    // topData() ensures the extra is created but does not ensure 'window' is non-null
    // in case the extra was already valid.
    if (!win) {
        createTLSysExtra();
        win = topData()->window;
    }

    win->setFlags(data.window_flags);
    fixPosIncludesFrame();
    if (q->testAttribute(Qt::WA_Moved))
        win->setGeometry(q->geometry());
    else
        win->resize(q->size());
    win->setScreen(QGuiApplication::screens().value(topData()->screenIndex, 0));

    if (q->testAttribute(Qt::WA_TranslucentBackground)) {
        QSurfaceFormat format;
        format.setAlphaBufferSize(8);
        win->setFormat(format);
    }

    if (QWidget *nativeParent = q->nativeParentWidget()) {
        if (nativeParent->windowHandle()) {
            if (flags & Qt::Window) {
                win->setTransientParent(nativeParent->windowHandle());
                win->setParent(0);
            } else {
                win->setTransientParent(0);
                win->setParent(nativeParent->windowHandle());
            }
        }
    }

    qt_window_private(win)->positionPolicy = topData()->posIncludesFrame ?
        QWindowPrivate::WindowFrameInclusive : QWindowPrivate::WindowFrameExclusive;
    win->create();
    // Enable nonclient-area events for QDockWidget and other NonClientArea-mouse event processing.
    if ((flags & Qt::Desktop) == Qt::Window)
        win->handle()->setFrameStrutEventsEnabled(true);

    data.window_flags = win->flags();

    QBackingStore *store = q->backingStore();

    if (!store) {
        if (win && q->windowType() != Qt::Desktop)
            q->setBackingStore(new QBackingStore(win));
        else
            q->setAttribute(Qt::WA_PaintOnScreen, true);
    }

    setWindowModified_helper();
    setWinId(win->winId());

    // Check children and create windows for them if necessary
    q_createNativeChildrenAndSetParent(q);

    if (extra && !extra->mask.isEmpty())
        setMask_sys(extra->mask);

    // If widget is already shown, set window visible, too
    if (q->isVisible())
        win->setVisible(true);
}