C++ QDockWidgetLayout::widget方法代码示例

void QDockWidgetPrivate::updateButtons()
{
    Q_Q(QDockWidget);
    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(q->layout());

    QStyleOptionDockWidget opt;
    q->initStyleOption(&opt);

    bool customTitleBar = layout->widget(QDockWidgetLayout::TitleBar) != 0;
    bool nativeDeco = layout->nativeWindowDeco();
    bool hideButtons = nativeDeco || customTitleBar;

    bool canClose = hasFeature(q, QDockWidget::DockWidgetClosable);
    bool canFloat = hasFeature(q, QDockWidget::DockWidgetFloatable);

    QAbstractButton *button
        = qobject_cast<QAbstractButton*>(layout->widget(QDockWidgetLayout::FloatButton));
    button->setIcon(q->style()->standardIcon(QStyle::SP_TitleBarNormalButton));
    button->setVisible(canFloat && !hideButtons);

    button
        = qobject_cast <QAbstractButton*>(layout->widget(QDockWidgetLayout::CloseButton));
    button->setIcon(q->style()->standardIcon(QStyle::SP_TitleBarCloseButton));
    button->setVisible(canClose && !hideButtons);

    q->setAttribute(Qt::WA_ContentsPropagated,
                    (canFloat || canClose) && !hideButtons);

    layout->invalidate();
}

/*! \reimp */
void QDockWidget::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event)

    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    bool customTitleBar = layout->widget(QDockWidgetLayout::TitleBar) != 0;
    bool nativeDeco = layout->nativeWindowDeco();

    if (!nativeDeco && !customTitleBar) {
        QStylePainter p(this);
        // ### Add PixelMetric to change spacers, so style may show border
        // when not floating.
        if (isFloating()) {
            QStyleOptionFrame framOpt;
            framOpt.init(this);
            p.drawPrimitive(QStyle::PE_FrameDockWidget, framOpt);
        }

        // Title must be painted after the frame, since the areas overlap, and
        // the title may wish to extend out to all sides (eg. XP style)
        QStyleOptionDockWidgetV2 titleOpt;
        initStyleOption(&titleOpt);
        p.drawControl(QStyle::CE_DockWidgetTitle, titleOpt);
    }
}

void QDockWidgetPrivate::setWindowState(bool floating, bool unplug, const QRect &rect)
{
    Q_Q(QDockWidget);

    bool wasFloating = q->isFloating();
    bool hidden = q->isHidden();

    if (q->isVisible())
        q->hide();

    Qt::WindowFlags flags = floating ? Qt::Tool : Qt::Widget;

    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(q->layout());
    bool nativeDeco = floating && layout->widget(QDockWidgetLayout::TitleBar) == 0;
#if defined(Q_WS_X11) || defined(Q_WS_QWS)
    nativeDeco = false;
#endif

    if (nativeDeco) {
        flags |= Qt::CustomizeWindowHint | Qt::WindowTitleHint;
        if (hasFeature(q, QDockWidget::DockWidgetClosable))
            flags |= Qt::WindowSystemMenuHint;
    } else {
        flags |= Qt::FramelessWindowHint;
    }

    if (unplug)
        flags |= Qt::X11BypassWindowManagerHint;

    q->setWindowFlags(flags);

#ifdef Q_WS_MAC
    if (floating && nativeDeco && (q->features() & QDockWidget::DockWidgetVerticalTitleBar)) {
        ChangeWindowAttributes(HIViewGetWindow(HIViewRef(q->winId())), kWindowSideTitlebarAttribute, 0);
    }
#endif

    if (!rect.isNull())
        q->setGeometry(rect);

    updateButtons();

    if (!hidden)
        q->show();

    if (floating != wasFloating)
        emit q->topLevelChanged(floating);

    resizer->setActive(QWidgetResizeHandler::Resize, !unplug && floating && !nativeDeco);
}

void QDockWidgetPrivate::endDrag(bool abort)
{
    Q_Q(QDockWidget);
    Q_ASSERT(state != 0);

    q->releaseMouse();

    if (state->dragging) {
        QMainWindowLayout *layout =
            qobject_cast<QMainWindowLayout *>(q->parentWidget()->layout());
        Q_ASSERT(layout != 0);

        if (abort || !layout->plug(state->widgetItem)) {
            if (::hasFeature(q, QDockWidget::DockWidgetFloatable)) {
                if (state->ownWidgetItem)
                    delete state->widgetItem;
                layout->restore();
#ifdef Q_WS_X11
                // get rid of the X11BypassWindowManager window flag and activate the resizer
                Qt::WindowFlags flags = q->windowFlags();
                flags &= ~Qt::X11BypassWindowManagerHint;
                q->setWindowFlags(flags);
                resizer->setActive(QWidgetResizeHandler::Resize, true);
                q->show();
#else
                QDockWidgetLayout *myLayout
                    = qobject_cast<QDockWidgetLayout*>(q->layout());
                resizer->setActive(QWidgetResizeHandler::Resize,
                                    myLayout->widget(QDockWidgetLayout::TitleBar) != 0);
#endif
                undockedGeometry = q->geometry();
                q->activateWindow();
            } else {
                layout->revert(state->widgetItem);
            }
        }
    }
    delete state;
    state = 0;
}

QWidget *QDockWidget::titleBarWidget() const
{
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    return layout->widget(QDockWidgetLayout::TitleBar);
}

/*!
    Returns the widget for the dock widget. This function returns zero
    if the widget has not been set.

    \sa setWidget()
*/
QWidget *QDockWidget::widget() const
{
    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(this->layout());
    return layout->widget(QDockWidgetLayout::Content);
}