C++ QMainWindowLayout类代码示例

void QToolBarPrivate::endDrag()
{
    Q_Q(QToolBar);
    Q_ASSERT(state != 0);

    q->releaseMouse();

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

        if (!layout->plug(state->widgetItem)) {
            if (q->isFloatable()) {
                layout->restore();
#if defined(Q_WS_X11) || defined(Q_WS_MAC)
                setWindowState(true); // gets rid of the X11BypassWindowManager window flag
                // and activates the resizer
#endif
                q->activateWindow();
            } else {
                layout->revert(state->widgetItem);
            }
        }
    }

    delete state;
    state = 0;
}

void QDockWidgetPrivate::startDrag()
{
    Q_Q(QDockWidget);

    if (state == 0 || state->dragging)
        return;

    QMainWindowLayout *layout = qt_mainwindow_layout(qobject_cast<QMainWindow *>(q->parentWidget()));
    Q_ASSERT(layout != 0);

    state->widgetItem = layout->unplug(q);
    if (state->widgetItem == 0) {
        /* I have a QMainWindow parent, but I was never inserted with
            QMainWindow::addDockWidget, so the QMainWindowLayout has no
            widget item for me. :( I have to create it myself, and then
            delete it if I don't get dropped into a dock area. */
        state->widgetItem = new QDockWidgetItem(q);
        state->ownWidgetItem = true;
    }

    if (state->ctrlDrag)
        layout->restore();

    state->dragging = true;
}

/*!
    \internal
*/
void QToolBar::initStyleOption(QStyleOptionToolBar *option) const
{
    Q_D(const QToolBar);

    if (!option)
        return;

    option->initFrom(this);
    if (orientation() == Qt::Horizontal)
        option->state |= QStyle::State_Horizontal;
    option->lineWidth = style()->pixelMetric(QStyle::PM_ToolBarFrameWidth, 0, this);
    option->features = d->layout->movable()
                       ? QStyleOptionToolBar::Movable
                       : QStyleOptionToolBar::None;
    // if the tool bar is not in a QMainWindow, this will make the painting right
    option->toolBarArea = Qt::NoToolBarArea;

    // Add more styleoptions if the toolbar has been added to a mainwindow.
    QMainWindow *mainWindow = qobject_cast<QMainWindow *>(parentWidget());

    if (!mainWindow)
        return;

    QMainWindowLayout *layout = qobject_cast<QMainWindowLayout *>(mainWindow->layout());
    Q_ASSERT_X(layout != 0, "QToolBar::initStyleOption()",
               "QMainWindow->layout() != QMainWindowLayout");

    layout->getStyleOptionInfo(option, const_cast<QToolBar *>(this));
}

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;
}

void QToolBarPrivate::startDrag(bool moving)
{
    Q_Q(QToolBar);

    Q_ASSERT(state != 0);

    if ((moving && state->moving) || state->dragging)
        return;

    QMainWindow *win = qobject_cast<QMainWindow*>(parent);
    Q_ASSERT(win != 0);
    QMainWindowLayout *layout = qt_mainwindow_layout(win);
    Q_ASSERT(layout != 0);

    if (!moving) {
        state->widgetItem = layout->unplug(q);
        Q_ASSERT(state->widgetItem != 0);
    }
    state->dragging = !moving;
    state->moving = moving;
}

void QRasterWindowSurface::setGeometry(const QRect &rect)
{
    QWindowSurface::setGeometry(rect);
    Q_D(QRasterWindowSurface);
    d->inSetGeometry = true;
    if (d->image == 0 || d->image->width() < rect.width() || d->image->height() < rect.height()) {
#if (defined(Q_WS_X11) && !defined(QT_NO_XRENDER)) || (defined(Q_WS_WIN))

#ifndef Q_WS_WIN
        if (d_ptr->translucentBackground)
#else
        if (!qt_widget_private(window())->isOpaque)
#endif
            prepareBuffer(QImage::Format_ARGB32_Premultiplied, window());
        else
#endif
            prepareBuffer(QNativeImage::systemFormat(), window());
    }
    d->inSetGeometry = false;

#if defined(Q_WS_MAC) && defined(QT_MAC_USE_COCOA)
    QMainWindow* mWindow = qobject_cast<QMainWindow*>(window());
    if (mWindow) {
        QMainWindowLayout *mLayout = qobject_cast<QMainWindowLayout*>(mWindow->layout());
        QList<QToolBar *> toolbarList = mLayout->qtoolbarsInUnifiedToolbarList;

        for (int i = 0; i < toolbarList.size(); ++i) {
            QToolBar* toolbar = toolbarList.at(i);
            if (mLayout->toolBarArea(toolbar) == Qt::TopToolBarArea) {
                QWidget* tbWidget = (QWidget*) toolbar;
                if (tbWidget->d_func()->unifiedSurface) {
                    tbWidget->d_func()->unifiedSurface->setGeometry(rect);
                }
            }
        }
    }
#endif // Q_WS_MAC && QT_MAC_USE_COCOA

}

/*! \reimp */
bool QDockWidget::event(QEvent *event)
{
    Q_D(QDockWidget);

    QMainWindow *win = qobject_cast<QMainWindow*>(parentWidget());
    QMainWindowLayout *layout = qt_mainwindow_layout(win);

    switch (event->type()) {
#ifndef QT_NO_ACTION
    case QEvent::Hide:
        if (layout != 0)
            layout->keepSize(this);
        d->toggleViewAction->setChecked(false);
        emit visibilityChanged(false);
        break;
    case QEvent::Show:
        d->toggleViewAction->setChecked(true);
        emit visibilityChanged(geometry().right() >= 0 && geometry().bottom() >= 0);
        break;
#endif
    case QEvent::ApplicationLayoutDirectionChange:
    case QEvent::LayoutDirectionChange:
    case QEvent::StyleChange:
    case QEvent::ParentChange:
        d->updateButtons();
        break;
    case QEvent::ZOrderChange: {
        bool onTop = false;
        if (win != 0) {
            const QObjectList &siblings = win->children();
            onTop = siblings.count() > 0 && siblings.last() == (QObject*)this;
        }
        if (!isFloating() && layout != 0 && onTop)
            layout->raise(this);
        break;
    }
    case QEvent::WindowActivate:
    case QEvent::WindowDeactivate:
        update(qobject_cast<QDockWidgetLayout *>(this->layout())->titleArea());
        break;
    case QEvent::ContextMenu:
        if (d->state) {
            event->accept();
            return true;
        }
        break;
        // return true after calling the handler since we don't want
        // them to be passed onto the default handlers
    case QEvent::MouseButtonPress:
        if (d->mousePressEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::MouseButtonDblClick:
        if (d->mouseDoubleClickEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::MouseMove:
        if (d->mouseMoveEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
#ifdef Q_OS_WIN
    case QEvent::Leave:
        if (d->state != 0 && d->state->dragging && !d->state->nca) {
            // This is a workaround for loosing the mouse on Vista.
            QPoint pos = QCursor::pos();
            QMouseEvent fake(QEvent::MouseMove, mapFromGlobal(pos), pos, Qt::NoButton,
                             QApplication::mouseButtons(), QApplication::keyboardModifiers());
            d->mouseMoveEvent(&fake);
        }
        break;
#endif
    case QEvent::MouseButtonRelease:
        if (d->mouseReleaseEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::NonClientAreaMouseMove:
    case QEvent::NonClientAreaMouseButtonPress:
    case QEvent::NonClientAreaMouseButtonRelease:
    case QEvent::NonClientAreaMouseButtonDblClick:
        d->nonClientAreaMouseEvent(static_cast<QMouseEvent*>(event));
        return true;
    case QEvent::Move:
        d->moveEvent(static_cast<QMoveEvent*>(event));
        break;
    case QEvent::Resize:
        // if the mainwindow is plugging us, we don't want to update undocked geometry
        if (isFloating() && layout != 0 && layout->pluggingWidget != this)
            d->undockedGeometry = geometry();
        break;
    default:
        break;
    }
    return QWidget::event(event);
}

void QUnifiedToolbarSurface::updateToolbarOffset(QWidget *widget)
{
    QMainWindowLayout *mlayout = qobject_cast<QMainWindowLayout*> (widget->window()->layout());
    if (mlayout)
        mlayout->updateUnifiedToolbarOffset();
}

/*! \reimp */
bool QDockWidget::event(QEvent *event)
{
    Q_D(QDockWidget);

    QMainWindow *win = qobject_cast<QMainWindow*>(parentWidget());
    QMainWindowLayout *layout = qt_mainwindow_layout(win);

    switch (event->type()) {
#ifndef QT_NO_ACTION
    case QEvent::Hide:
        if (layout != 0)
            layout->keepSize(this);
        d->toggleViewAction->setChecked(false);
        emit visibilityChanged(false);
        break;
    case QEvent::Show: {
        d->toggleViewAction->setChecked(true);
        const QPoint parentTopLeft = isWindow() ?
            QApplication::desktop()->availableGeometry(this).topLeft() : QPoint(0, 0);
        emit visibilityChanged(geometry().right() >= parentTopLeft.x() && geometry().bottom() >= parentTopLeft.y());
}
        break;
#endif
    case QEvent::ApplicationLayoutDirectionChange:
    case QEvent::LayoutDirectionChange:
    case QEvent::StyleChange:
    case QEvent::ParentChange:
        d->updateButtons();
        break;
    case QEvent::ZOrderChange: {
        bool onTop = false;
        if (win != 0) {
            const QObjectList &siblings = win->children();
            onTop = siblings.count() > 0 && siblings.last() == (QObject*)this;
        }
        if (!isFloating() && layout != 0 && onTop)
            layout->raise(this);
        break;
    }
    case QEvent::WindowActivate:
    case QEvent::WindowDeactivate:
        update(qobject_cast<QDockWidgetLayout *>(this->layout())->titleArea());
        break;
    case QEvent::ContextMenu:
        if (d->state) {
            event->accept();
            return true;
        }
        break;
        // return true after calling the handler since we don't want
        // them to be passed onto the default handlers
    case QEvent::MouseButtonPress:
        if (d->mousePressEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::MouseButtonDblClick:
        if (d->mouseDoubleClickEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::MouseMove:
        if (d->mouseMoveEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::MouseButtonRelease:
        if (d->mouseReleaseEvent(static_cast<QMouseEvent *>(event)))
            return true;
        break;
    case QEvent::NonClientAreaMouseMove:
    case QEvent::NonClientAreaMouseButtonPress:
    case QEvent::NonClientAreaMouseButtonRelease:
    case QEvent::NonClientAreaMouseButtonDblClick:
        d->nonClientAreaMouseEvent(static_cast<QMouseEvent*>(event));
        return true;
    case QEvent::Move:
        d->moveEvent(static_cast<QMoveEvent*>(event));
        break;
    case QEvent::Resize:
        // if the mainwindow is plugging us, we don't want to update undocked geometry
        if (isFloating() && layout != 0 && layout->pluggingWidget != this)
            d->undockedGeometry = geometry();
        break;
    default:
        break;
    }
    return QWidget::event(event);
}