qmenubar.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

                register QAction *act = d->actionList.at(i);
                QString s = act->text();
                if(!s.isEmpty()) {
                    int ampersand = s.indexOf('&');
                    if(ampersand >= 0) {
                        if(s[ampersand+1].toUpper() == c) {
                            clashCount++;
                            if(!first)
                                first = act;
                            if(act == d->currentAction)
                                currentSelected = act;
                            else if (!firstAfterCurrent && currentSelected)
                                firstAfterCurrent = act;
                        }
                    }
                }
            }
        }
        QAction *next_action = 0;
        if(clashCount >= 1) {
            if(clashCount == 1 || !d->currentAction || (currentSelected && !firstAfterCurrent))
                next_action = first;
            else
                next_action = firstAfterCurrent;
        }
        if(next_action) {
            key_consumed = true;
            d->setCurrentAction(next_action, true, true);
        }
    }
    if(key_consumed)
        e->accept();
    else
        e->ignore();
}

/*!
  \reimp
*/
void QMenuBar::mouseMoveEvent(QMouseEvent *e)
{
    Q_D(QMenuBar);
    d->mouseDown = e->buttons() & Qt::LeftButton;
    QAction *action = d->actionAt(e->pos());
    bool popupState = d->popupState || d->mouseDown;
    if(action && d->isVisible(action) || !popupState)
        d->setCurrentAction(action, popupState);
}

/*!
  \reimp
*/
void QMenuBar::leaveEvent(QEvent *)
{
    Q_D(QMenuBar);
    if(!hasFocus() && !d->popupState)
        d->setCurrentAction(0);
}

/*!
  \reimp
*/
void QMenuBar::actionEvent(QActionEvent *e)
{
    Q_D(QMenuBar);
    d->itemsDirty = true;
#ifdef Q_WS_MAC
    if(d->mac_menubar) {
        if(e->type() == QEvent::ActionAdded)
            d->mac_menubar->addAction(e->action(), d->mac_menubar->findAction(e->before()));
        else if(e->type() == QEvent::ActionRemoved)
            d->mac_menubar->removeAction(e->action());
        else if(e->type() == QEvent::ActionChanged)
            d->mac_menubar->syncAction(e->action());
    }
#endif
    if(e->type() == QEvent::ActionAdded) {
        connect(e->action(), SIGNAL(triggered()), this, SLOT(_q_actionTriggered()));
        connect(e->action(), SIGNAL(hovered()), this, SLOT(_q_actionHovered()));
    } else if(e->type() == QEvent::ActionRemoved) {
        e->action()->disconnect(this);
    }
    if (isVisible()) {
        d->updateGeometries();
        update();
    }
}

/*!
  \reimp
*/
void QMenuBar::focusInEvent(QFocusEvent *)
{
    Q_D(QMenuBar);
    if(d->keyboardState && !d->currentAction && !d->actionList.isEmpty())
        d->setCurrentAction(d->actionList.first());
}

/*!
  \reimp
*/
void QMenuBar::focusOutEvent(QFocusEvent *)
{
    Q_D(QMenuBar);
    if(!d->popupState) {
        d->setCurrentAction(0);
        d->setKeyboardMode(false);
    }
}



void QMenuBarPrivate::handleReparent()
{
    Q_Q(QMenuBar);
    QWidget *newParent = q->parentWidget();
    //Note: if parent is reparented, then window may change even if parent doesn't

    // we need to install an event filter on parent, and remove the old one

    if (oldParent != newParent) {
        if (oldParent)
            oldParent->removeEventFilter(q);
        if (newParent)
            newParent->installEventFilter(q);
    }

    //we also need event filter on top-level (for shortcuts)
    QWidget *newWindow = newParent ? newParent->window() : 0;

    if (oldWindow != newWindow) {
        if (oldParent && oldParent != oldWindow)
            oldWindow->removeEventFilter(q);

        if (newParent && newParent != newWindow)
            newWindow->installEventFilter(q);
    }

    oldParent = newParent;
    oldWindow = newWindow;
}

#ifdef QT3_SUPPORT
/*!
    Sets whether the menu bar should automatically resize itself
    when its parent widget is resized.

    This feature is provided to help porting to Qt 4. We recommend
    against using it in new code.

    \sa autoGeometry()
*/
void QMenuBar::setAutoGeometry(bool b)
{
    Q_D(QMenuBar);
    d->doAutoResize = b;
}

/*!
    Returns true if the menu bar automatically resizes itself
    when its parent widget is resized; otherwise returns false.

    This feature is provided to help porting to Qt 4. We recommend
    against using it in new code.

    \sa setAutoGeometry()
*/
bool QMenuBar::autoGeometry() const
{
    Q_D(const QMenuBar);
    return d->doAutoResize;
}
#endif

/*!
  \reimp
*/
void QMenuBar::changeEvent(QEvent *e)
{
    Q_D(QMenuBar);
    if(e->type() == QEvent::StyleChange) {
        d->itemsDirty = true;
        setMouseTracking(style()->styleHint(QStyle::SH_MenuBar_MouseTracking, 0, this));
        if(parentWidget())
            resize(parentWidget()->width(), heightForWidth(parentWidget()->width()));
    } else if (e->type() == QEvent::ParentChange)
        d->handleReparent();
    QWidget::changeEvent(e);
}

/*!
  \reimp
*/
bool QMenuBar::event(QEvent *e)
{
    Q_D(QMenuBar);
    switch (e->type()) {
    case QEvent::KeyPress: {
        QKeyEvent *ke = (QKeyEvent*)e;
#if 0
        if(!d->keyboardState) { //all keypresses..
            d->setCurrentAction(0);
            return ;
        }
#endif
        if(ke->key() == Qt::Key_Tab || ke->key() == Qt::Key_Backtab) {
            keyPressEvent(ke);
            return true;
        }

    } break;
#ifndef QT_NO_SHORTCUT
    case QEvent::Shortcut: {
        QShortcutEvent *se = static_cast<QShortcutEvent *>(e);
        int shortcutId = se->shortcutId();
        for(int j = 0; j < d->shortcutIndexMap.size(); ++j) {
            if (shortcutId == d->shortcutIndexMap.value(j))
                d->_q_internalShortcutActivated(j);
        }
    } break;
#endif
    case QEvent::Show:
#ifdef QT3_SUPPORT
        // If itemsDirty == true, updateGeometries sends the MenubarUpdated event.
        if (!d->itemsDirty) {
            QMenubarUpdatedEvent menubarUpdated(this);
            QApplication::sendEvent(parentWidget(), &menubarUpdated);
        }
#endif
        d->updateGeometries();
    break;

#ifdef QT3_SUPPORT
    case QEvent::Hide: {
        QMenubarUpdatedEvent menubarUpdated(this);
        QApplication::sendEvent(parentWidget(), &menubarUpdated);
    } break;
#endif

#ifndef QT_NO_WHATSTHIS
    case QEvent::QueryWhatsThis:
        e->setAccepted(d->whatsThis.size());
        if (QAction *action = d->actionAt(static_cast<QHelpEvent*>(e)->pos())) {
            if (action->whatsThis().size() || action->menu())
                e->accept();
        }
        return true;
#endif
    default:
        break;
    }
    return QWidget::event(e);
}

/*!
  \reimp
*/
bool QMenuBar::eventFilter(QObject *object, QEvent *event)
{
    Q_D(QMenuBar);
    if (object == parent() && object) {
#ifdef QT3_SUPPORT
        if (d->doAutoResize && event->type() == QEvent::Resize) {
            QResizeEvent *e = (QResizeEvent *)event;
            int w = e->size().width();
            setGeometry(0, y(), w, heightForWidth(w));
            return false;
        }
#endif
        if (event->type() == QEvent::ParentChange) //GrandparentChange
            d->handleReparent();
    }
    if (object == d->leftWidget || object == d->rightWidget) {
        switch (event->type()) {
        case QEvent::ShowToParent:
        case QEvent::HideToParent:
            d->_q_updateLayout();
            break;
        default:
            break;
        }
    }

    if (style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, 0, this)) {
        if (d->altPressed) {
            switch (event->type()) {
            case QEvent::KeyPress:
            case QEvent::KeyRelease:
            {
                QKeyEvent *kev = static_cast<QKeyEvent*>(event);
                if (kev->key() == Qt::Key_Alt || kev->key() == Qt::Key_Meta) {
                    if (event->type() == QEvent::KeyPress) // Alt-press does not interest us, we have the shortcut-override event
                        break;
                    d->setKeyboardMode(!d->keyboardState);
                }
            }
            // fall through
            case QEvent::MouseButtonPress:
            case QEvent::FocusIn:
            case QEvent::FocusOut:
            case QEvent::ActivationChange:
                d->altPressed = false;
                qApp->removeEventFilter(this);
                break;
            default:
                break;
            }
        } else if (isVisible()) {
            if (event->type() == QEvent::ShortcutOverride) {
                QKeyEvent *kev = static_cast<QKeyEvent*>(event);
                if ((kev->key() == Qt::Key_Alt || kev->key() == Qt::Key_Meta)
                    && kev->modifiers() == Qt::AltModifier) {
                    d->altPressed = true;
                    qApp->installEventFilter(this);
                }
            }
        }
    }

    return false;
}

/*!
  \internal

  Return the item at \a pt, or 0 if there is no item there or if it is
  a separator item.
*/
QAction *QMenuBar::actionAt(const QPoint &pt) const
{
    Q_D(const QMenuBar);
    return d->actionAt(pt);
}

/*!
  \internal

  Returns the geometry of action \a act.
*/
QRect QMenuBar::actionGeometry(QAction *act) const
{
    Q_D(const QMenuBar);
    return d->actionRect(act);
}

/*!
  \reimp
*/
QSize QMenuBar::minimumSizeHint() const
{
    Q_D(const QMenuBar);
#ifdef Q_WS_MAC
    const bool as_gui_menubar = !d->mac_menubar;
#else
    const bool as_gui_menubar = true;
#endif

    ensurePolished();
    QSize ret(0, 0);
    const int hmargin = style()->pixelMetric(QStyle::PM_MenuBarHMargin, 0, this);
    const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, 0, this);
    int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, 0, this);
    int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, 0, this);
    if(as_gui_menubar) {
        QMap<QAction*, QRect> actionRects;
        QList<QAction*> actionList;
        int w = parentWidget() ? parentWidget()->width() : QApplication::desktop()->width();
        d->calcActionRects(w - (2 * fw), 0, actionRects, actionList);
        if (d->actionList.count() > 0) {
            ret = d->actionRect(d->actionList.at(0)).size();
            if (!d->extension->isHidden())
                ret += QSize(d->extension->sizeHint().width(), 0);
        }
        ret += QSize(2*fw + hmargin, 2*fw + vmargin);
    }
    int margin = 2*vmargin + 2*fw + spaceBelowMenuBar;
    if(d->leftWidget) {
        QSize sz = d->leftWidget->minimumSizeHint();
        ret.setWidth(ret.width() + sz.width());
        if(sz.height() + margin > ret.height())
            ret.setHeight(sz.height() + margin);
    }
    if(d->rightWidget) {
        QSize sz = d->rightWidget->minimumSizeHint();
        ret.setWidth(ret.width() + sz.width());
        if(sz.height() + margin > ret.height())
            ret.setHeight(sz.height() + margin);
    }
    if(as_gui_menubar) {
        QStyleOptionMenuItem opt;
        opt.rect = rect();
        opt.menuRect = rect();
        opt.state = QStyle::State_None;
        opt.menuItemType = QStyleOptionMenuItem::Normal;
        opt.checkType = QStyleOptionMenuItem::NotCheckable;
        opt.palette = palette();
        return (style()->sizeFromContents(QStyle::CT_MenuBar, &opt,
                                         ret.expandedTo(QApplication::globalStrut()),
                                         this));
    }
    return ret;
}

/*!
  \reimp
*/
QSize QMenuBar::sizeHint() const
{
    Q_D(const QMenuBar);
#ifdef Q_WS_MAC
    const bool as_gui_menubar = !d->mac_menubar;
#else
    const bool as_gui_menubar = true;
#endif

    ensurePolished();
    QSize ret(0, 0);
    const int hmargin = style()->pixelMetric(QStyle::PM_MenuBarHMargin, 0, this);
    const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, 0, this);
    int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, 0, this);
    int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, 0, this);
    if(as_gui_menubar) {
        QMap<QAction*, QRect> actionRects;
        QList<QAction*> actionList;
        const int w = parentWidget() ? parentWidget()->width() : QApplication::desktop()->width();
        d->calcActionRects(w - (2 * fw), 0, actionRects, actionList);
        for (QMap<QAction*, QRect>::const_iterator i = actionRects.begin();
             i != actionRects.constEnd(); ++i) {
            QRect actionRect(i.value());
            if(actionRect.x() + actionRect.width() > ret.width())
                ret.setWidth(actionRect.x() + actionRect.width());
            if(actionRect.y() + actionRect.height() > ret.height())
                ret.setHeight(actionRect.y() + actionRect.height());
        }
        ret += QSize(2*fw + 2*hmargin, 2*fw + 2*vmargin);
    }
    int margin = 2*vmargin + 2*fw + spaceBelowMenuBar;
    if(d->leftWidget) {
        QSize sz = d->leftWidget->sizeHint();
        ret.setWidth(ret.width() + sz.width());
        if(sz.height() + margin > ret.height())
            ret.setHeight(sz.height() + margin);
    }
    if(d->rightWidget) {
        QSize sz = d->rightWidget->sizeHint();
        ret.setWidth(ret.width() + sz.width());
        if(sz.height() + margin > ret.height())
            ret.setHeight(sz.height() + margin);
    }
    if(as_gui_menubar) {
        QStyleOptionMenuItem opt;
        opt.rect = rect();
        opt.menuRect = rect();
        opt.state = QStyle::State_None;
        opt.menuItemType = QStyleOptionMenuItem::Normal;
        opt.checkType = QStyleOptionMenuItem::NotCheckable;
        opt.palette = palette();
        return (style()->sizeFromContents(QStyle::CT_MenuBar, &opt,
                                         ret.expandedTo(QApplication::globalStrut()),
                                         this));
    }
    return ret;
}

/*!
  \reimp
*/
int QMenuBar::heightForWidth(int) const
{
    Q_D(const QMenuBar);
#ifdef Q_WS_MAC
    const bool as_gui_menubar = !d->mac_menubar;
#else
    const bool as_gui_menubar = true;
#endif
    int height = 0;
    const int vmargin = style()->pixelMetric(QStyle::PM_MenuBarVMargin, 0, this);
    int fw = style()->pixelMetric(QStyle::PM_MenuBarPanelWidth, 0, this);
    int spaceBelowMenuBar = style()->styleHint(QStyle::SH_MainWindow_SpaceBelowMenuBar, 0, this);
    if(as_gui_menubar) {
        if (d->actionList.count()) {
            // assume all actionrects have the same height