Qt源码分析--QWidget(4)--Geometry

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已于 2022-03-14 17:33:23 修改 · 1.9k 阅读

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#c++ #开发语言

于 2022-03-14 17:28:55 首次发布

1.void move(int x, int y);

inline void QWidget::move(int ax, int ay)
{ move(QPoint(ax, ay)); }

void QWidget::move(const QPoint &p)
{
    Q_D(QWidget);
    setAttribute(Qt::WA_Moved);
    if (testAttribute(Qt::WA_WState_Created)) {
        if (isWindow())
            d->topData()->posIncludesFrame = false;
        d->setGeometry_sys(p.x() + geometry().x() - QWidget::x(),
                       p.y() + geometry().y() - QWidget::y(),
                       width(), height(), true);
        d->setDirtyOpaqueRegion();
    } else {
        // no frame yet: see also QWidgetPrivate::fixPosIncludesFrame(), QWindowPrivate::PositionPolicy.
        if (isWindow())
            d->topData()->posIncludesFrame = true;
        data->crect.moveTopLeft(p); // no frame yet
        setAttribute(Qt::WA_PendingMoveEvent);
    }
    if (d->extra && d->extra->hasWindowContainer)
        QWindowContainer::parentWasMoved(this);
}

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