qmainwindow.cpp

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** Contact: http://www.qt-project.org/legal
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//#define QT_EXPERIMENTAL_CLIENT_DECORATIONS

#include "qmainwindow.h"
#include "qmainwindowlayout_p.h"

#ifndef QT_NO_MAINWINDOW

#include "qdockwidget.h"
#include "qtoolbar.h"

#include <qapplication.h>
#include <qmenubar.h>
#include <qstatusbar.h>
#include <qevent.h>
#include <qstyle.h>
#include <qdebug.h>
#include <qpainter.h>

#include <private/qwidget_p.h>
#include "qtoolbar_p.h"
#include "qwidgetanimator_p.h"
#ifdef Q_WS_MAC
#include <private/qt_mac_p.h>
#include <private/qt_cocoa_helpers_mac_p.h>
QT_BEGIN_NAMESPACE
extern OSWindowRef qt_mac_window_for(const QWidget *); // qwidget_mac.cpp
QT_END_NAMESPACE
#endif

QT_BEGIN_NAMESPACE

class QMainWindowPrivate : public QWidgetPrivate
{
    Q_DECLARE_PUBLIC(QMainWindow)
public:
    inline QMainWindowPrivate()
        : layout(0), explicitIconSize(false), toolButtonStyle(Qt::ToolButtonIconOnly)
#ifdef Q_WS_MAC
            , useHIToolBar(false)
#endif
#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)
            , hasOldCursor(false) , cursorAdjusted(false)
#endif
    { }
    QMainWindowLayout *layout;
    QSize iconSize;
    bool explicitIconSize;
    Qt::ToolButtonStyle toolButtonStyle;
#ifdef Q_WS_MAC
    bool useHIToolBar;
#endif
    void init();
    QList<int> hoverSeparator;
    QPoint hoverPos;

#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)
    QCursor separatorCursor(const QList<int> &path) const;
    void adjustCursor(const QPoint &pos);
    QCursor oldCursor;
    uint hasOldCursor : 1;
    uint cursorAdjusted : 1;
#endif

    static inline QMainWindowLayout *mainWindowLayout(const QMainWindow *mainWindow)
    {
        return mainWindow ? mainWindow->d_func()->layout : static_cast<QMainWindowLayout *>(0);
    }
};

QMainWindowLayout *qt_mainwindow_layout(const QMainWindow *mainWindow)
{
    return QMainWindowPrivate::mainWindowLayout(mainWindow);
}

#ifdef QT_EXPERIMENTAL_CLIENT_DECORATIONS
Q_GUI_EXPORT void qt_setMainWindowTitleWidget(QMainWindow *mainWindow, Qt::DockWidgetArea area, QWidget *widget)
{
    QGridLayout *topLayout = qobject_cast<QGridLayout *>(mainWindow->layout());
    Q_ASSERT(topLayout);

    int row = 0;
    int column = 0;

    switch (area) {
    case Qt::LeftDockWidgetArea:
        row = 1;
        column = 0;
        break;
    case Qt::TopDockWidgetArea:
        row = 0;
        column = 1;
        break;
    case Qt::BottomDockWidgetArea:
        row = 2;
        column = 1;
        break;
    case Qt::RightDockWidgetArea:
        row = 1;
        column = 2;
        break;
    default:
        Q_ASSERT_X(false, "qt_setMainWindowTitleWidget", "Unknown area");
        return;
    }

    if (QLayoutItem *oldItem = topLayout->itemAtPosition(row, column))
        delete oldItem->widget();
    topLayout->addWidget(widget, row, column);
}
#endif

void QMainWindowPrivate::init()
{
    Q_Q(QMainWindow);

#ifdef QT_EXPERIMENTAL_CLIENT_DECORATIONS
    QGridLayout *topLayout = new QGridLayout(q);
    topLayout->setContentsMargins(0, 0, 0, 0);

    layout = new QMainWindowLayout(q, topLayout);

    topLayout->addItem(layout, 1, 1);
#else
    layout = new QMainWindowLayout(q, 0);
#endif

    const int metric = q->style()->pixelMetric(QStyle::PM_ToolBarIconSize, 0, q);
    iconSize = QSize(metric, metric);
    q->setAttribute(Qt::WA_Hover);
}

/*
    The Main Window:

    +----------------------------------------------------------+
    | Menu Bar                                                 |
    +----------------------------------------------------------+
    | Tool Bar Area                                            |
    |   +--------------------------------------------------+   |
    |   | Dock Window Area                                 |   |
    |   |   +------------------------------------------+   |   |
    |   |   |                                          |   |   |
    |   |   | Central Widget                           |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   |                                          |   |   |
    |   |   +------------------------------------------+   |   |
    |   |                                                  |   |
    |   +--------------------------------------------------+   |
    |                                                          |
    +----------------------------------------------------------+
    | Status Bar                                               |
    +----------------------------------------------------------+

*/

QMainWindow::QMainWindow(QWidget *parent, Qt::WindowFlags flags)
    : QWidget(*(new QMainWindowPrivate()), parent, flags | Qt::Window)
{
    d_func()->init();
}

#ifdef QT3_SUPPORT

QMainWindow::QMainWindow(QWidget *parent, const char *name, Qt::WindowFlags flags)
    : QWidget(*(new QMainWindowPrivate()), parent, flags | Qt::WType_TopLevel)
{
    setObjectName(QString::fromAscii(name));
    d_func()->init();
}
#endif

QMainWindow::~QMainWindow()
{ }

void QMainWindow::setDockOptions(DockOptions opt)
{
    Q_D(QMainWindow);
    d->layout->setDockOptions(opt);
}

QMainWindow::DockOptions QMainWindow::dockOptions() const
{
    Q_D(const QMainWindow);
    return d->layout->dockOptions;
}

QSize QMainWindow::iconSize() const
{ return d_func()->iconSize; }

void QMainWindow::setIconSize(const QSize &iconSize)
{
    Q_D(QMainWindow);
    QSize sz = iconSize;
    if (!sz.isValid()) {
        const int metric = style()->pixelMetric(QStyle::PM_ToolBarIconSize, 0, this);
        sz = QSize(metric, metric);
    }
    if (d->iconSize != sz) {
        d->iconSize = sz;
        emit iconSizeChanged(d->iconSize);
    }
    d->explicitIconSize = iconSize.isValid();
}

Qt::ToolButtonStyle QMainWindow::toolButtonStyle() const
{ return d_func()->toolButtonStyle; }

void QMainWindow::setToolButtonStyle(Qt::ToolButtonStyle toolButtonStyle)
{
    Q_D(QMainWindow);
    if (d->toolButtonStyle == toolButtonStyle)
        return;
    d->toolButtonStyle = toolButtonStyle;
    emit toolButtonStyleChanged(d->toolButtonStyle);
}

#ifndef QT_NO_MENUBAR

QMenuBar *QMainWindow::menuBar() const
{
    QMenuBar *menuBar = qobject_cast<QMenuBar *>(layout()->menuBar());
    if (!menuBar) {
        QMainWindow *self = const_cast<QMainWindow *>(this);
        menuBar = new QMenuBar(self);
        self->setMenuBar(menuBar);
    }
    return menuBar;
}

void QMainWindow::setMenuBar(QMenuBar *menuBar)
{
    QLayout *topLayout = layout();

    if (topLayout->menuBar() && topLayout->menuBar() != menuBar) {
        // Reparent corner widgets before we delete the old menu bar.
        QMenuBar *oldMenuBar = qobject_cast<QMenuBar *>(topLayout->menuBar());
        if (menuBar) {
            // TopLeftCorner widget.
            QWidget *cornerWidget = oldMenuBar->cornerWidget(Qt::TopLeftCorner);
            if (cornerWidget)
                menuBar->setCornerWidget(cornerWidget, Qt::TopLeftCorner);
            // TopRightCorner widget.
            cornerWidget = oldMenuBar->cornerWidget(Qt::TopRightCorner);
            if (cornerWidget)
                menuBar->setCornerWidget(cornerWidget, Qt::TopRightCorner);
        }
        oldMenuBar->hide();
        oldMenuBar->deleteLater();
    }
    topLayout->setMenuBar(menuBar);
}

QWidget *QMainWindow::menuWidget() const
{
    QWidget *menuBar = d_func()->layout->menuBar();
    return menuBar;
}

void QMainWindow::setMenuWidget(QWidget *menuBar)
{
    Q_D(QMainWindow);
    if (d->layout->menuBar() && d->layout->menuBar() != menuBar) {
        d->layout->menuBar()->hide();
        d->layout->menuBar()->deleteLater();
    }
    d->layout->setMenuBar(menuBar);
}
#endif // QT_NO_MENUBAR

#ifndef QT_NO_STATUSBAR

QStatusBar *QMainWindow::statusBar() const
{
    QStatusBar *statusbar = d_func()->layout->statusBar();
    if (!statusbar) {
        QMainWindow *self = const_cast<QMainWindow *>(this);
        statusbar = new QStatusBar(self);
        statusbar->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Fixed);
        self->setStatusBar(statusbar);
    }
    return statusbar;
}

void QMainWindow::setStatusBar(QStatusBar *statusbar)
{
    Q_D(QMainWindow);
    if (d->layout->statusBar() && d->layout->statusBar() != statusbar) {
        d->layout->statusBar()->hide();
        d->layout->statusBar()->deleteLater();
    }
    d->layout->setStatusBar(statusbar);
}
#endif // QT_NO_STATUSBAR

QWidget *QMainWindow::centralWidget() const
{ return d_func()->layout->centralWidget(); }

void QMainWindow::setCentralWidget(QWidget *widget)
{
    Q_D(QMainWindow);
    if (d->layout->centralWidget() && d->layout->centralWidget() != widget) {
        d->layout->centralWidget()->hide();
        d->layout->centralWidget()->deleteLater();
    }
    d->layout->setCentralWidget(widget);
}

#ifndef QT_NO_DOCKWIDGET

void QMainWindow::setCorner(Qt::Corner corner, Qt::DockWidgetArea area)
{
    bool valid = false;
    switch (corner) {
    case Qt::TopLeftCorner:
        valid = (area == Qt::TopDockWidgetArea || area == Qt::LeftDockWidgetArea);
        break;
    case Qt::TopRightCorner:
        valid = (area == Qt::TopDockWidgetArea || area == Qt::RightDockWidgetArea);
        break;
    case Qt::BottomLeftCorner:
        valid = (area == Qt::BottomDockWidgetArea || area == Qt::LeftDockWidgetArea);
        break;
    case Qt::BottomRightCorner:
        valid = (area == Qt::BottomDockWidgetArea || area == Qt::RightDockWidgetArea);
        break;
    }
    if (!valid)
        qWarning("QMainWindow::setCorner(): 'area' is not valid for 'corner'");
    else
        d_func()->layout->setCorner(corner, area);
}

Qt::DockWidgetArea QMainWindow::corner(Qt::Corner corner) const
{ return d_func()->layout->corner(corner); }
#endif

#ifndef QT_NO_TOOLBAR

static bool checkToolBarArea(Qt::ToolBarArea area, const char *where)
{
    switch (area) {
    case Qt::LeftToolBarArea:
    case Qt::RightToolBarArea:
    case Qt::TopToolBarArea:
    case Qt::BottomToolBarArea:
        return true;
    default:
        break;
    }
    qWarning("%s: invalid 'area' argument", where);
    return false;
}

void QMainWindow::addToolBarBreak(Qt::ToolBarArea area)
{
    if (!checkToolBarArea(area, "QMainWindow::addToolBarBreak"))
        return;
    d_func()->layout->addToolBarBreak(area);
}

void QMainWindow::insertToolBarBreak(QToolBar *before)
{ d_func()->layout->insertToolBarBreak(before); }

void QMainWindow::removeToolBarBreak(QToolBar *before)
{
    Q_D(QMainWindow);
    d->layout->removeToolBarBreak(before);
}

void QMainWindow::addToolBar(Qt::ToolBarArea area, QToolBar *toolbar)
{
    if (!checkToolBarArea(area, "QMainWindow::addToolBar"))
        return;

    Q_D(QMainWindow);

    disconnect(this, SIGNAL(iconSizeChanged(QSize)),
               toolbar, SLOT(_q_updateIconSize(QSize)));
    disconnect(this, SIGNAL(toolButtonStyleChanged(Qt::ToolButtonStyle)),
               toolbar, SLOT(_q_updateToolButtonStyle(Qt::ToolButtonStyle)));

    if(toolbar->d_func()->state && toolbar->d_func()->state->dragging) {
        //removing a toolbar which is dragging will cause crash
#ifndef QT_NO_DOCKWIDGET
        bool animated = isAnimated();
        setAnimated(false);
#endif
        toolbar->d_func()->endDrag();
#ifndef QT_NO_DOCKWIDGET
        setAnimated(animated);
#endif
    }

    if (!d->layout->usesHIToolBar(toolbar)) {
        d->layout->removeWidget(toolbar);
    } else {
        d->layout->removeToolBar(toolbar);
    }

    toolbar->d_func()->_q_updateIconSize(d->iconSize);
    toolbar->d_func()->_q_updateToolButtonStyle(d->toolButtonStyle);
    connect(this, SIGNAL(iconSizeChanged(QSize)),
            toolbar, SLOT(_q_updateIconSize(QSize)));
    connect(this, SIGNAL(toolButtonStyleChanged(Qt::ToolButtonStyle)),
            toolbar, SLOT(_q_updateToolButtonStyle(Qt::ToolButtonStyle)));

    d->layout->addToolBar(area, toolbar);
}

void QMainWindow::addToolBar(QToolBar *toolbar)
{ addToolBar(Qt::TopToolBarArea, toolbar); }

QToolBar *QMainWindow::addToolBar(const QString &title)
{
    QToolBar *toolBar = new QToolBar(this);
    toolBar->setWindowTitle(title);
    addToolBar(toolBar);
    return toolBar;
}

void QMainWindow::insertToolBar(QToolBar *before, QToolBar *toolbar)
{
    Q_D(QMainWindow);

    d->layout->removeToolBar(toolbar);

    toolbar->d_func()->_q_updateIconSize(d->iconSize);
    toolbar->d_func()->_q_updateToolButtonStyle(d->toolButtonStyle);
    connect(this, SIGNAL(iconSizeChanged(QSize)),
            toolbar, SLOT(_q_updateIconSize(QSize)));
    connect(this, SIGNAL(toolButtonStyleChanged(Qt::ToolButtonStyle)),
            toolbar, SLOT(_q_updateToolButtonStyle(Qt::ToolButtonStyle)));

    d->layout->insertToolBar(before, toolbar);
}

void QMainWindow::removeToolBar(QToolBar *toolbar)
{
    if (toolbar) {
        d_func()->layout->removeToolBar(toolbar);
        toolbar->hide();
    }
}

Qt::ToolBarArea QMainWindow::toolBarArea(QToolBar *toolbar) const
{ return d_func()->layout->toolBarArea(toolbar); }

bool QMainWindow::toolBarBreak(QToolBar *toolbar) const
{
    return d_func()->layout->toolBarBreak(toolbar);
}

#endif // QT_NO_TOOLBAR

#ifndef QT_NO_DOCKWIDGET

bool QMainWindow::isAnimated() const
{
    Q_D(const QMainWindow);
    return d->layout->dockOptions & AnimatedDocks;
}

void QMainWindow::setAnimated(bool enabled)
{
    Q_D(QMainWindow);

    DockOptions opts = d->layout->dockOptions;
    if (enabled)
        opts |= AnimatedDocks;
    else
        opts &= ~AnimatedDocks;

    d->layout->setDockOptions(opts);
}

bool QMainWindow::isDockNestingEnabled() const
{
    Q_D(const QMainWindow);
    return d->layout->dockOptions & AllowNestedDocks;
}

void QMainWindow::setDockNestingEnabled(bool enabled)
{
    Q_D(QMainWindow);

    DockOptions opts = d->layout->dockOptions;
    if (enabled)
        opts |= AllowNestedDocks;
    else
        opts &= ~AllowNestedDocks;

    d->layout->setDockOptions(opts);
}

#if 0

bool QMainWindow::verticalTabsEnabled() const
{
    return d_func()->layout->verticalTabsEnabled();
}

void QMainWindow::setVerticalTabsEnabled(bool enabled)
{
    d_func()->layout->setVerticalTabsEnabled(enabled);
}
#endif

static bool checkDockWidgetArea(Qt::DockWidgetArea area, const char *where)
{
    switch (area) {
    case Qt::LeftDockWidgetArea:
    case Qt::RightDockWidgetArea:
    case Qt::TopDockWidgetArea:
    case Qt::BottomDockWidgetArea:
        return true;
    default:
        break;
    }
    qWarning("%s: invalid 'area' argument", where);
    return false;
}

#ifndef QT_NO_TABBAR

bool QMainWindow::documentMode() const
{
    return d_func()->layout->documentMode();
}

void QMainWindow::setDocumentMode(bool enabled)
{
    d_func()->layout->setDocumentMode(enabled);
}
#endif // QT_NO_TABBAR

#ifndef QT_NO_TABWIDGET

QTabWidget::TabShape QMainWindow::tabShape() const
{
    return d_func()->layout->tabShape();
}

void QMainWindow::setTabShape(QTabWidget::TabShape tabShape)
{
    d_func()->layout->setTabShape(tabShape);
}

QTabWidget::TabPosition QMainWindow::tabPosition(Qt::DockWidgetArea area) const
{
    if (!checkDockWidgetArea(area, "QMainWindow::tabPosition"))
        return QTabWidget::South;
    return d_func()->layout->tabPosition(area);
}

void QMainWindow::setTabPosition(Qt::DockWidgetAreas areas, QTabWidget::TabPosition tabPosition)
{
    d_func()->layout->setTabPosition(areas, tabPosition);
}
#endif // QT_NO_TABWIDGET

void QMainWindow::addDockWidget(Qt::DockWidgetArea area, QDockWidget *dockwidget)
{
    if (!checkDockWidgetArea(area, "QMainWindow::addDockWidget"))
        return;

    Qt::Orientation orientation = Qt::Vertical;
    switch (area) {
    case Qt::TopDockWidgetArea:
    case Qt::BottomDockWidgetArea:
        orientation = Qt::Horizontal;
        break;
    default:
        break;
    }
    d_func()->layout->removeWidget(dockwidget); // in case it was already in here
    addDockWidget(area, dockwidget, orientation);

#ifdef Q_WS_MAC     //drawer support
    QMacCocoaAutoReleasePool pool;
    extern bool qt_mac_is_macdrawer(const QWidget *); //qwidget_mac.cpp
    if (qt_mac_is_macdrawer(dockwidget)) {
        extern bool qt_mac_set_drawer_preferred_edge(QWidget *, Qt::DockWidgetArea); //qwidget_mac.cpp
        window()->createWinId();
        dockwidget->window()->createWinId();
        qt_mac_set_drawer_preferred_edge(dockwidget, area);
        if (dockwidget->isVisible()) {
            dockwidget->hide();
            dockwidget->show();
        }
    }
#endif
}

bool QMainWindow::restoreDockWidget(QDockWidget *dockwidget)
{
    return d_func()->layout->restoreDockWidget(dockwidget);
}

void QMainWindow::addDockWidget(Qt::DockWidgetArea area, QDockWidget *dockwidget,
                                Qt::Orientation orientation)
{
    if (!checkDockWidgetArea(area, "QMainWindow::addDockWidget"))
        return;

    // add a window to an area, placing done relative to the previous
    d_func()->layout->addDockWidget(area, dockwidget, orientation);
}

void QMainWindow::splitDockWidget(QDockWidget *after, QDockWidget *dockwidget,
                                  Qt::Orientation orientation)
{
    d_func()->layout->splitDockWidget(after, dockwidget, orientation);
}

void QMainWindow::tabifyDockWidget(QDockWidget *first, QDockWidget *second)
{
    d_func()->layout->tabifyDockWidget(first, second);
}


QList<QDockWidget*> QMainWindow::tabifiedDockWidgets(QDockWidget *dockwidget) const
{
    QList<QDockWidget*> ret;
#if defined(QT_NO_TABBAR)
    Q_UNUSED(dockwidget);
#else
    const QDockAreaLayoutInfo *info = d_func()->layout->layoutState.dockAreaLayout.info(dockwidget);
    if (info && info->tabbed && info->tabBar) {
        for(int i = 0; i < info->item_list.count(); ++i) {
            const QDockAreaLayoutItem &item = info->item_list.at(i);
            if (item.widgetItem) {
                if (QDockWidget *dock = qobject_cast<QDockWidget*>(item.widgetItem->widget())) {
                    if (dock != dockwidget) {
                        ret += dock;
                    }
                }
            }
        }
    }
#endif
    return ret;
}


void QMainWindow::removeDockWidget(QDockWidget *dockwidget)
{
    if (dockwidget) {
        d_func()->layout->removeWidget(dockwidget);
        dockwidget->hide();
    }
}

Qt::DockWidgetArea QMainWindow::dockWidgetArea(QDockWidget *dockwidget) const
{ return d_func()->layout->dockWidgetArea(dockwidget); }

#endif // QT_NO_DOCKWIDGET

QByteArray QMainWindow::saveState(int version) const
{
    QByteArray data;
    QDataStream stream(&data, QIODevice::WriteOnly);
    stream << QMainWindowLayout::VersionMarker;
    stream << version;
    d_func()->layout->saveState(stream);
    return data;
}

bool QMainWindow::restoreState(const QByteArray &state, int version)
{
    if (state.isEmpty())
        return false;
    QByteArray sd = state;
    QDataStream stream(&sd, QIODevice::ReadOnly);
    int marker, v;
    stream >> marker;
    stream >> v;
    if (stream.status() != QDataStream::Ok || marker != QMainWindowLayout::VersionMarker || v != version)
        return false;
    bool restored = d_func()->layout->restoreState(stream);
    return restored;
}

#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)
QCursor QMainWindowPrivate::separatorCursor(const QList<int> &path) const
{
    QDockAreaLayoutInfo *info = layout->layoutState.dockAreaLayout.info(path);
    Q_ASSERT(info != 0);
    if (path.size() == 1) { // is this the "top-level" separator which separates a dock area
                            // from the central widget?
        switch (path.first()) {
            case QInternal::LeftDock:
            case QInternal::RightDock:
                return Qt::SplitHCursor;
            case QInternal::TopDock:
            case QInternal::BottomDock:
                return Qt::SplitVCursor;
            default:
                break;
        }
    }

    // no, it's a splitter inside a dock area, separating two dock widgets

    return info->o == Qt::Horizontal
            ? Qt::SplitHCursor : Qt::SplitVCursor;
}

void QMainWindowPrivate::adjustCursor(const QPoint &pos)
{
    Q_Q(QMainWindow);

    hoverPos = pos;

    if (pos == QPoint(0, 0)) {
        if (!hoverSeparator.isEmpty())
            q->update(layout->layoutState.dockAreaLayout.separatorRect(hoverSeparator));
        hoverSeparator.clear();

        if (cursorAdjusted) {
            cursorAdjusted = false;
            if (hasOldCursor)
                q->setCursor(oldCursor);
            else
                q->unsetCursor();
        }
    } else {
        QList<int> pathToSeparator
            = layout->layoutState.dockAreaLayout.findSeparator(pos);

        if (pathToSeparator != hoverSeparator) {
            if (!hoverSeparator.isEmpty())
                q->update(layout->layoutState.dockAreaLayout.separatorRect(hoverSeparator));

            hoverSeparator = pathToSeparator;

            if (hoverSeparator.isEmpty()) {
                if (cursorAdjusted) {
                    cursorAdjusted = false;
                    if (hasOldCursor)
                        q->setCursor(oldCursor);
                    else
                        q->unsetCursor();
                }
            } else {
                q->update(layout->layoutState.dockAreaLayout.separatorRect(hoverSeparator));
                if (!cursorAdjusted) {
                    oldCursor = q->cursor();
                    hasOldCursor = q->testAttribute(Qt::WA_SetCursor);
                }
                QCursor cursor = separatorCursor(hoverSeparator);
                cursorAdjusted = false; //to not reset the oldCursor in event(CursorChange)
                q->setCursor(cursor);
                cursorAdjusted = true;
            }
        }
    }
}
#endif

bool QMainWindow::event(QEvent *event)
{
    Q_D(QMainWindow);
    switch (event->type()) {

#ifndef QT_NO_DOCKWIDGET
        case QEvent::Paint: {
            QPainter p(this);
            QRegion r = static_cast<QPaintEvent*>(event)->region();
            d->layout->layoutState.dockAreaLayout.paintSeparators(&p, this, r, d->hoverPos);
            break;
        }

#ifndef QT_NO_CURSOR
        case QEvent::HoverMove:  {
            d->adjustCursor(static_cast<QHoverEvent*>(event)->pos());
            break;
        }

        // We don't want QWidget to call update() on the entire QMainWindow
        // on HoverEnter and HoverLeave, hence accept the event (return true).
        case QEvent::HoverEnter:
            return true;
        case QEvent::HoverLeave:
            d->adjustCursor(QPoint(0, 0));
            return true;
        case QEvent::ShortcutOverride: // when a menu pops up
            d->adjustCursor(QPoint(0, 0));
            break;
#endif // QT_NO_CURSOR

        case QEvent::MouseButtonPress: {
            QMouseEvent *e = static_cast<QMouseEvent*>(event);
            if (e->button() == Qt::LeftButton && d->layout->startSeparatorMove(e->pos())) {
                // The click was on a separator, eat this event
                e->accept();
                return true;
            }
            break;
        }

        case QEvent::MouseMove: {
            QMouseEvent *e = static_cast<QMouseEvent*>(event);

#ifndef QT_NO_CURSOR
            d->adjustCursor(e->pos());
#endif
            if (e->buttons() & Qt::LeftButton) {
                if (d->layout->separatorMove(e->pos())) {
                    // We're moving a separator, eat this event
                    e->accept();
                    return true;
                }
            }

            break;
        }

        case QEvent::MouseButtonRelease: {
            QMouseEvent *e = static_cast<QMouseEvent*>(event);
            if (d->layout->endSeparatorMove(e->pos())) {
                // We've released a separator, eat this event
                e->accept();
                return true;
            }
            break;
        }

#endif

#ifndef QT_NO_TOOLBAR
        case QEvent::ToolBarChange: {
            d->layout->toggleToolBarsVisible();
            return true;
        }
#endif

#ifndef QT_NO_STATUSTIP
        case QEvent::StatusTip:
#ifndef QT_NO_STATUSBAR
            if (QStatusBar *sb = d->layout->statusBar())
                sb->showMessage(static_cast<QStatusTipEvent*>(event)->tip());
            else
#endif
                static_cast<QStatusTipEvent*>(event)->ignore();
            return true;
#endif // QT_NO_STATUSTIP

        case QEvent::StyleChange:
#ifndef QT_NO_DOCKWIDGET
            d->layout->layoutState.dockAreaLayout.styleChangedEvent();
#endif
            if (!d->explicitIconSize)
                setIconSize(QSize());
            break;
#ifdef Q_WS_MAC
        case QEvent::Show:
            d->layout->blockVisiblityCheck = false;
            if (unifiedTitleAndToolBarOnMac())
                d->layout->syncUnifiedToolbarVisibility();
            break;
       case QEvent::WindowStateChange:
            {
                if (isHidden()) {
                    // We are coming out of a minimize, leave things as is.
                    d->layout->blockVisiblityCheck = true;
                }
#  ifdef QT_MAC_USE_COCOA
                // We need to update the HIToolbar status when we go out of or into fullscreen.
                QWindowStateChangeEvent *wce = static_cast<QWindowStateChangeEvent *>(event);
                if ((windowState() & Qt::WindowFullScreen) || (wce->oldState() & Qt::WindowFullScreen)) {
                    d->layout->updateHIToolBarStatus();
                }
#  endif // Cocoa
            }
            break;
#endif // Q_WS_MAC
#if !defined(QT_NO_DOCKWIDGET) && !defined(QT_NO_CURSOR)
       case QEvent::CursorChange:
           if (d->cursorAdjusted) {
               d->oldCursor = cursor();
               d->hasOldCursor = testAttribute(Qt::WA_SetCursor);
           }
           break;
#endif
        default:
            break;
    }

    return QWidget::event(event);
}

#ifndef QT_NO_TOOLBAR

void QMainWindow::setUnifiedTitleAndToolBarOnMac(bool set)
{
#ifdef Q_WS_MAC
    Q_D(QMainWindow);
    if (!isWindow() || d->useHIToolBar == set || QSysInfo::MacintoshVersion < QSysInfo::MV_10_3)
        return;

    d->useHIToolBar = set;
    createWinId(); // We need the hiview for down below.

#ifdef QT_MAC_USE_COCOA
    // Activate the unified toolbar with the raster engine.
    if (windowSurface() && set) {
        d->layout->unifiedSurface = new QUnifiedToolbarSurface(this);
    }
#endif // QT_MAC_USE_COCOA

    d->layout->updateHIToolBarStatus();

#ifdef QT_MAC_USE_COCOA
    // Deactivate the unified toolbar with the raster engine.
    if (windowSurface() && !set) {
        if (d->layout->unifiedSurface) {
            delete d->layout->unifiedSurface;
            d->layout->unifiedSurface = 0;
        }
    }
#endif // QT_MAC_USE_COCOA

    // Enabling the unified toolbar clears the opaque size grip setting, update it.
    d->macUpdateOpaqueSizeGrip();
#else
    Q_UNUSED(set)
#endif
}

bool QMainWindow::unifiedTitleAndToolBarOnMac() const
{
#ifdef Q_WS_MAC
    return d_func()->useHIToolBar && !testAttribute(Qt::WA_MacBrushedMetal) && !(windowFlags() & Qt::FramelessWindowHint);
#endif
    return false;
}

#endif // QT_NO_TOOLBAR

bool QMainWindow::isSeparator(const QPoint &pos) const
{
#ifndef QT_NO_DOCKWIDGET
    Q_D(const QMainWindow);
    return !d->layout->layoutState.dockAreaLayout.findSeparator(pos).isEmpty();
#else
    Q_UNUSED(pos);
    return false;
#endif
}

#ifndef QT_NO_CONTEXTMENU

void QMainWindow::contextMenuEvent(QContextMenuEvent *event)
{
    event->ignore();
    // only show the context menu for direct QDockWidget and QToolBar
    // children and for the menu bar as well
    QWidget *child = childAt(event->pos());
    while (child && child != this) {
#ifndef QT_NO_MENUBAR
        if (QMenuBar *mb = qobject_cast<QMenuBar *>(child)) {
            if (mb->parentWidget() != this)
                return;
            break;
        }
#endif
#ifndef QT_NO_DOCKWIDGET
        if (QDockWidget *dw = qobject_cast<QDockWidget *>(child)) {
            if (dw->parentWidget() != this)
                return;
            if (dw->widget()
                && dw->widget()->geometry().contains(child->mapFrom(this, event->pos()))) {
                // ignore the event if the mouse is over the QDockWidget contents
                return;
            }
            break;
        }
#endif // QT_NO_DOCKWIDGET
#ifndef QT_NO_TOOLBAR
        if (QToolBar *tb = qobject_cast<QToolBar *>(child)) {
            if (tb->parentWidget() != this)
                return;
            break;
        }
#endif
        child = child->parentWidget();
    }
    if (child == this)
        return;

#ifndef QT_NO_MENU
    QMenu *popup = createPopupMenu();
    if (popup) {
        if (!popup->isEmpty()) {
            popup->setAttribute(Qt::WA_DeleteOnClose);
            popup->popup(event->globalPos());
            event->accept();
        } else {
            delete popup;
        }
    }
#endif
}
#endif // QT_NO_CONTEXTMENU

#ifndef QT_NO_MENU

QMenu *QMainWindow::createPopupMenu()
{
    Q_D(QMainWindow);
    QMenu *menu = 0;
#ifndef QT_NO_DOCKWIDGET
    QList<QDockWidget *> dockwidgets = findChildren<QDockWidget *>();
    if (dockwidgets.size()) {
        menu = new QMenu(this);
        for (int i = 0; i < dockwidgets.size(); ++i) {
            QDockWidget *dockWidget = dockwidgets.at(i);
            if (dockWidget->parentWidget() == this
                && !d->layout->layoutState.dockAreaLayout.indexOf(dockWidget).isEmpty()) {
                menu->addAction(dockwidgets.at(i)->toggleViewAction());
            }
        }
        menu->addSeparator();
    }
#endif // QT_NO_DOCKWIDGET
#ifndef QT_NO_TOOLBAR
    QList<QToolBar *> toolbars = findChildren<QToolBar *>();
    if (toolbars.size()) {
        if (!menu)
            menu = new QMenu(this);
        for (int i = 0; i < toolbars.size(); ++i) {
            QToolBar *toolBar = toolbars.at(i);
            if (toolBar->parentWidget() == this
                && (!d->layout->layoutState.toolBarAreaLayout.indexOf(toolBar).isEmpty()
                    || (unifiedTitleAndToolBarOnMac()
                        && toolBarArea(toolBar) == Qt::TopToolBarArea))) {
                menu->addAction(toolbars.at(i)->toggleViewAction());
            }
        }
    }
#endif
    Q_UNUSED(d);
    return menu;
}
#endif // QT_NO_MENU

QT_END_NAMESPACE

#endif // QT_NO_MAINWINDOW