示例#1
0
void QDockWidgetPrivate::initDrag(const QPoint &pos, bool nca)
{
    if (state != 0)
        return;

    Q_Q(QDockWidget);
    QMainWindow *win = qobject_cast<QMainWindow*>(parent);
    Q_ASSERT(win != 0);
    QMainWindowLayout *layout = qt_mainwindow_layout(win);
    Q_ASSERT(layout != 0);
    if (layout->pluggingWidget != 0) // the main window is animating a docking operation
        return;

    state = new QDockWidgetPrivate::DragState;
    state->dragging = false;
    state->widgetItem = 0;
    state->ownWidgetItem = false;
    state->nca = nca;
    state->ctrlDrag = false;

    if (!q->isFloating()) {
        // When dragging the widget out of the docking area,
        // use the middle of title area as pressPos
        QDockWidgetLayout *dwlayout = qobject_cast<QDockWidgetLayout*>(q->layout());
        Q_ASSERT(dwlayout != 0);
        int width = undockedGeometry.isNull() ? q->width() : undockedGeometry.width();
        state->pressPos.setY(dwlayout->titleArea().height() / 2);
        state->pressPos.setX(width / 2);
    } else {
        state->pressPos = pos;
    }
}
示例#2
0
/*! \reimp */
void QDockWidget::paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event)

    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    bool customTitleBar = layout->widgetForRole(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);
    }
}
示例#3
0
void QDockWidgetPrivate::init()
{
    Q_Q(QDockWidget);

    QDockWidgetLayout *layout = new QDockWidgetLayout(q);
    layout->setSizeConstraint(QLayout::SetMinAndMaxSize);

    QAbstractButton *button = new QDockWidgetTitleButton(q);
    button->setObjectName(QLatin1String("qt_dockwidget_floatbutton"));
    QObject::connect(button, SIGNAL(clicked()), q, SLOT(_q_toggleTopLevel()));
    layout->setWidgetForRole(QDockWidgetLayout::FloatButton, button);

    button = new QDockWidgetTitleButton(q);
    button->setObjectName(QLatin1String("qt_dockwidget_closebutton"));
    QObject::connect(button, SIGNAL(clicked()), q, SLOT(close()));
    layout->setWidgetForRole(QDockWidgetLayout::CloseButton, button);

    resizer = new QWidgetResizeHandler(q);
    resizer->setMovingEnabled(false);
    resizer->setActive(false);

#ifndef QT_NO_ACTION
    toggleViewAction = new QAction(q);
    toggleViewAction->setCheckable(true);
    fixedWindowTitle = qt_setWindowTitle_helperHelper(q->windowTitle(), q);
    toggleViewAction->setText(fixedWindowTitle);
    QObject::connect(toggleViewAction, SIGNAL(triggered(bool)),
                        q, SLOT(_q_toggleView(bool)));
#endif

    updateButtons();
}
示例#4
0
void QDockWidgetPrivate::updateButtons()
{
    Q_Q(QDockWidget);
    QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);

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

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

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

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

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

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

    layout->invalidate();
}
示例#5
0
bool QDockWidgetPrivate::mousePressEvent(QMouseEvent *event)
{
#if !defined(QT_NO_MAINWINDOW)
    Q_Q(QDockWidget);

    QDockWidgetLayout *dwLayout
        = qobject_cast<QDockWidgetLayout*>(layout);

    if (!dwLayout->nativeWindowDeco()) {
        QRect titleArea = dwLayout->titleArea();

        if (event->button() != Qt::LeftButton ||
            !titleArea.contains(event->pos()) ||
            // check if the tool window is movable... do nothing if it
            // is not (but allow moving if the window is floating)
            (!hasFeature(this, QDockWidget::DockWidgetMovable) && !q->isFloating()) ||
            qobject_cast<QMainWindow*>(parent) == 0 ||
            isAnimating() || state != 0) {
            return false;
        }

        initDrag(event->pos(), false);

        if (state)
            state->ctrlDrag = hasFeature(this, QDockWidget::DockWidgetFloatable) && event->modifiers() & Qt::ControlModifier;

        return true;
    }

#endif // !defined(QT_NO_MAINWINDOW)
    return false;
}
示例#6
0
/*! \reimp */
void QDockWidget::changeEvent(QEvent *event)
{
    Q_D(QDockWidget);
    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(this->layout());

    switch (event->type()) {
    case QEvent::ModifiedChange:
    case QEvent::WindowTitleChange:
        update(layout->titleArea());
#ifndef QT_NO_ACTION
        d->fixedWindowTitle = qt_setWindowTitle_helperHelper(windowTitle(), this);
        d->toggleViewAction->setText(d->fixedWindowTitle);
#endif
#ifndef QT_NO_TABBAR
        {
            QMainWindow *win = qobject_cast<QMainWindow*>(parentWidget());
            if (QMainWindowLayout *winLayout = qt_mainwindow_layout(win)) {
                if (QDockAreaLayoutInfo *info = winLayout->layoutState.dockAreaLayout.info(this))
                    info->updateTabBar();
            }
        }
#endif // QT_NO_TABBAR
        break;
    default:
        break;
    }
    QWidget::changeEvent(event);
}
示例#7
0
void QDockWidgetPrivate::setWindowState(bool floating, bool unplug, const QRect &rect)
{
    Q_Q(QDockWidget);

    if (!floating && parent) {
        QMainWindowLayout *mwlayout = qt_mainwindow_layout(qobject_cast<QMainWindow *>(q->parentWidget()));
        if (mwlayout && mwlayout->dockWidgetArea(q) == Qt::NoDockWidgetArea)
            return; // this dockwidget can't be redocked
    }

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

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

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

    QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);
    const bool nativeDeco = dwLayout->nativeWindowDeco(floating);

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

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

    q->setWindowFlags(flags);

#if defined(Q_WS_MAC) && !defined(QT_MAC_USE_COCOA)
    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);
        if (!floating && parent) {
            QMainWindowLayout *mwlayout = qt_mainwindow_layout(qobject_cast<QMainWindow *>(q->parentWidget()));
            if (mwlayout)
                emit q->dockLocationChanged(mwlayout->dockWidgetArea(q));
        }
    }

    resizer->setActive(QWidgetResizeHandler::Resize, !unplug && floating && !nativeDeco);
}
示例#8
0
void QDockWidgetPrivate::setWindowState(bool floating, bool unplug, const QRect &rect)
{
    Q_Q(QDockWidget);

    if (!floating && parent) {
        QMainWindowLayout *mwlayout = qt_mainwindow_layout(qobject_cast<QMainWindow *>(q->parentWidget()));
        if (mwlayout && mwlayout->dockWidgetArea(q) == Qt::NoDockWidgetArea)
            return; // this dockwidget can't be redocked
    }

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

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

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

    QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);
    const bool nativeDeco = dwLayout->nativeWindowDeco(floating);

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

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

    q->setWindowFlags(flags);


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

    updateButtons();

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

    if (floating != wasFloating) {
        emit q->topLevelChanged(floating);
        if (!floating && parent) {
            QMainWindowLayout *mwlayout = qt_mainwindow_layout(qobject_cast<QMainWindow *>(q->parentWidget()));
            if (mwlayout)
                emit q->dockLocationChanged(mwlayout->dockWidgetArea(q));
        }
    }

    if (floating && nativeDeco)
        if (const QWindow *window = q->windowHandle())
            if (QPlatformWindow *platformWindow = window->handle())
                platformWindow->setFrameStrutEventsEnabled(true);

    resizer->setActive(QWidgetResizeHandler::Resize, !unplug && floating && !nativeDeco);
}
示例#9
0
void QDockWidget::setTitleBarWidget(QWidget *widget)
{
    Q_D(QDockWidget);
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    layout->setWidget(QDockWidgetLayout::TitleBar, widget);
    d->updateButtons();
}
示例#10
0
void QDockWidgetPrivate::unplug(const QRect &rect)
{
    Q_Q(QDockWidget);
    QRect r = rect;
    r.moveTopLeft(q->mapToGlobal(QPoint(0, 0)));
    QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);
    if (dwLayout->nativeWindowDeco(true))
        r.adjust(0, dwLayout->titleHeight(), 0, 0);
    setWindowState(true, true, r);
}
示例#11
0
void QDockWidgetPrivate::unplug(const QRect &rect)
{
    Q_Q(QDockWidget);
    QRect r = rect;
    r.moveTopLeft(q->mapToGlobal(QPoint(0, 0)));
#ifndef Q_WS_X11
    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(q->layout());
    r.adjust(0, layout->titleHeight(), 0, 0);
#endif
    setWindowState(true, true, r);
}
示例#12
0
void QDockWidget::setTitleBarWidget(QWidget *widget)
{
    Q_D(QDockWidget);
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    layout->setWidgetForRole(QDockWidgetLayout::TitleBar, widget);
    d->updateButtons();
    if (isWindow()) {
        //this ensures the native decoration is drawn
        d->setWindowState(true /*floating*/, true /*unplug*/);
    }
}
示例#13
0
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);
}
示例#14
0
void QDockWidget::setFeatures(QDockWidget::DockWidgetFeatures features)
{
    Q_D(QDockWidget);
    features &= DockWidgetFeatureMask;
    if (d->features == features)
        return;
    d->features = features;
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    layout->setVerticalTitleBar(features & DockWidgetVerticalTitleBar);
    d->updateButtons();
    d->toggleViewAction->setEnabled((d->features & DockWidgetClosable) == DockWidgetClosable);
    emit featuresChanged(d->features);
    update();
}
示例#15
0
bool QDockWidgetPrivate::mouseDoubleClickEvent(QMouseEvent *event)
{
    QDockWidgetLayout *dwLayout = qobject_cast<QDockWidgetLayout*>(layout);

    if (!dwLayout->nativeWindowDeco()) {
        QRect titleArea = dwLayout->titleArea();

        if (event->button() == Qt::LeftButton && titleArea.contains(event->pos()) &&
            hasFeature(this, QDockWidget::DockWidgetFloatable)) {
            _q_toggleTopLevel();
            return true;
        }
    }
    return false;
}
示例#16
0
void tst_QDockWidget::taskQTBUG_1665_closableChanged()
{
    QDockWidget dock;
    dock.show();
    QVERIFY(QTest::qWaitForWindowExposed(&dock));

    QDockWidgetLayout *l = qobject_cast<QDockWidgetLayout*>(dock.layout());

    if (l && !l->nativeWindowDeco())
        QSKIP("this machine doesn't support native dock widget");

    QVERIFY(dock.windowFlags() & Qt::WindowCloseButtonHint);

    //now let's remove the closable attribute
    dock.setFeatures(dock.features() ^ QDockWidget::DockWidgetClosable);
    QVERIFY(!(dock.windowFlags() & Qt::WindowCloseButtonHint));
}
示例#17
0
void QDockWidgetPrivate::mouseDoubleClickEvent(QMouseEvent *event)
{
    Q_Q(QDockWidget);

    QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(q->layout());

    if (!layout->nativeWindowDeco()) {
        QRect titleArea = layout->titleArea();

        if (event->button() != Qt::LeftButton)
            return;
        if (!titleArea.contains(event->pos()))
            return;
        if (!::hasFeature(q, QDockWidget::DockWidgetFloatable))
            return;
        _q_toggleTopLevel();
    }
}
示例#18
0
/*!
    \property QDockWidget::floating
    \brief whether the dock widget is floating

    A floating dock widget is presented to the user as an independent
    window "on top" of its parent QMainWindow, instead of being
    docked in the QMainWindow.

    \sa isWindow()
*/
void QDockWidget::setFloating(bool floating)
{
    Q_D(QDockWidget);

    // the initial click of a double-click may have started a drag...
    if (d->state != 0)
        d->endDrag(true);

    QRect r = d->undockedGeometry;

    if (floating && r.isNull()) {
        QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(this->layout());
        QRect titleArea = layout->titleArea();
        int h = layout->verticalTitleBar ? titleArea.width() : titleArea.height();
        QPoint p = mapToGlobal(QPoint(h, h));
        r = QRect(p, size());
    }

    d->setWindowState(floating, false, floating ? r : QRect());
}
示例#19
0
void QDockWidget::setFeatures(QDockWidget::DockWidgetFeatures features)
{
    Q_D(QDockWidget);
    features &= DockWidgetFeatureMask;
    if (d->features == features)
        return;
    const bool closableChanged = (d->features ^ features) & DockWidgetClosable;
    d->features = features;
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    layout->setVerticalTitleBar(features & DockWidgetVerticalTitleBar);
    d->updateButtons();
    d->toggleViewAction->setEnabled((d->features & DockWidgetClosable) == DockWidgetClosable);
    emit featuresChanged(d->features);
    update();
    if (closableChanged && layout->nativeWindowDeco()) {
        //this ensures the native decoration is drawn
        d->setWindowState(true /*floating*/, true /*unplug*/);
    }
}
示例#20
0
bool QDockWidgetPrivate::mouseMoveEvent(QMouseEvent *event)
{
    bool ret = false;
#if !defined(QT_NO_MAINWINDOW)
    Q_Q(QDockWidget);

    if (!state)
        return ret;

    QDockWidgetLayout *dwlayout
        = qobject_cast<QDockWidgetLayout*>(layout);
    QMainWindowLayout *mwlayout
        = qobject_cast<QMainWindowLayout*>(q->parentWidget()->layout());
    if (!dwlayout->nativeWindowDeco()) {
        if (!state->dragging
            && mwlayout->pluggingWidget == 0
            && (event->pos() - state->pressPos).manhattanLength()
                > QApplication::startDragDistance()) {
            startDrag();
#ifdef Q_OS_WIN
            grabMouseWhileInWindow();
#else
            q->grabMouse();
#endif
            ret = true;
        }
    }

    if (state->dragging && !state->nca) {
        QPoint pos = event->globalPos() - state->pressPos;
        q->move(pos);

        if (!state->ctrlDrag)
            mwlayout->hover(state->widgetItem, event->globalPos());

        ret = true;
    }

#endif // !defined(QT_NO_MAINWINDOW)
    return ret;
}
示例#21
0
/*!
    Initialize \a option with the values from this QDockWidget. This method
    is useful for subclasses when they need a QStyleOptionDockWidget, but don't want
    to fill in all the information themselves.

    \sa QStyleOption::initFrom()
*/
void QDockWidget::initStyleOption(QStyleOptionDockWidget *option) const
{
    Q_D(const QDockWidget);

    if (!option)
        return;
    QDockWidgetLayout *dwlayout = qobject_cast<QDockWidgetLayout*>(layout());

    option->initFrom(this);
    option->rect = dwlayout->titleArea();
    option->title = d->fixedWindowTitle;
    option->closable = hasFeature(this, QDockWidget::DockWidgetClosable);
    option->movable = hasFeature(this, QDockWidget::DockWidgetMovable);
    option->floatable = hasFeature(this, QDockWidget::DockWidgetFloatable);

    QDockWidgetLayout *l = qobject_cast<QDockWidgetLayout*>(layout());
    QStyleOptionDockWidgetV2 *v2
        = qstyleoption_cast<QStyleOptionDockWidgetV2*>(option);
    if (v2 != 0)
        v2->verticalTitleBar = l->verticalTitleBar;
}
示例#22
0
void QDockWidgetPrivate::endDrag(bool abort)
{
    Q_Q(QDockWidget);
    Q_ASSERT(state != 0);

    q->releaseMouse();

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

        if (abort || !mwLayout->plug(state->widgetItem)) {
            if (hasFeature(this, QDockWidget::DockWidgetFloatable)) {
                if (state->ownWidgetItem)
                    delete state->widgetItem;
                mwLayout->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*>(layout);
                resizer->setActive(QWidgetResizeHandler::Resize,
                                    myLayout->widgetForRole(QDockWidgetLayout::TitleBar) != 0);
#endif
                undockedGeometry = q->geometry();
                q->activateWindow();
            } else {
                mwLayout->revert(state->widgetItem);
            }
        }
    }
    delete state;
    state = 0;
}
示例#23
0
void QDockWidgetPrivate::mousePressEvent(QMouseEvent *event)
{
#if !defined(QT_NO_MAINWINDOW)
    Q_Q(QDockWidget);

    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(q->layout());

    if (!layout->nativeWindowDeco()) {
        QRect titleArea = layout->titleArea();

        if (event->button() != Qt::LeftButton)
            return;
        if (!titleArea.contains(event->pos()))
            return;
        // check if the tool window is movable... do nothing if it is not
        if (!::hasFeature(q, QDockWidget::DockWidgetMovable))
            return;

        if (qobject_cast<QMainWindow*>(q->parentWidget()) == 0)
            return;

        if (isAnimating())
            return;

        if (state != 0)
            return;

        initDrag(event->pos(), false);

        if (state == 0)
            return;

        state->ctrlDrag = event->modifiers() & Qt::ControlModifier;
    }

#endif // !defined(QT_NO_MAINWINDOW)
}
示例#24
0
/*!
    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->widgetForRole(QDockWidgetLayout::Content);
}
示例#25
0
QWidget *QDockWidget::titleBarWidget() const
{
    QDockWidgetLayout *layout
        = qobject_cast<QDockWidgetLayout*>(this->layout());
    return layout->widgetForRole(QDockWidgetLayout::TitleBar);
}
示例#26
0
/*!
    Sets the widget for the dock widget to \a widget.

    If the dock widget is visible when \a widget is added, you must
    \l{QWidget::}{show()} it explicitly.

    Note that you must add the layout of the \a widget before you call
    this function; if not, the \a widget will not be visible.

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