MCL/sf/mw/qt: comparison src/gui/widgets/qmenu.cpp

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--1:000000000000
+:1918ee327afb
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qmenu.h"
+#ifndef QT_NO_MENU
+#include "qdebug.h"
+#include "qstyle.h"
+#include "qevent.h"
+#include "qtimer.h"
+#include "qlayout.h"
+#include "qpainter.h"
+#include "qapplication.h"
+#include "qdesktopwidget.h"
+#ifndef QT_NO_ACCESSIBILITY
+# include "qaccessible.h"
+#endif
+#ifndef QT_NO_EFFECTS
+# include <private/qeffects_p.h>
+#endif
+#ifndef QT_NO_WHATSTHIS
+# include <qwhatsthis.h>
+#endif
+#include "qmenu_p.h"
+#include "qmenubar_p.h"
+#include "qwidgetaction.h"
+#include "qtoolbutton.h"
+#include <private/qaction_p.h>
+#include <private/qsoftkeymanager_p.h>
+#ifdef QT3_SUPPORT
+#include <qmenudata.h>
+#endif // QT3_SUPPORT
+#ifdef Q_WS_X11
+#   include <private/qt_x11_p.h>
+#endif
+#if defined(Q_WS_MAC) && !defined(QT_NO_EFFECTS)
+#   include <private/qcore_mac_p.h>
+#   include <private/qt_cocoa_helpers_mac_p.h>
+#endif
+QT_BEGIN_NAMESPACE
+QPointer<QMenu> QMenuPrivate::mouseDown;
+QBasicTimer QMenuPrivate::menuDelayTimer;
+QBasicTimer QMenuPrivate::sloppyDelayTimer;
+/* QMenu code */
+// internal class used for the torn off popup
+class QTornOffMenu : public QMenu
+{
+Q_OBJECT
+class QTornOffMenuPrivate : public QMenuPrivate
+{
+Q_DECLARE_PUBLIC(QMenu)
+public:
+QTornOffMenuPrivate(QMenu *p) : causedMenu(p) {
+tornoff = 1;
+causedPopup.widget = 0;
+causedPopup.action = ((QTornOffMenu*)p)->d_func()->causedPopup.action;
+causedStack = ((QTornOffMenu*)p)->d_func()->calcCausedStack();
+}
+QList<QPointer<QWidget> > calcCausedStack() const { return causedStack; }
+QPointer<QMenu> causedMenu;
+QList<QPointer<QWidget> > causedStack;
+};
+public:
+QTornOffMenu(QMenu *p) : QMenu(*(new QTornOffMenuPrivate(p)))
+{
+Q_D(QTornOffMenu);
+// make the torn-off menu a sibling of p (instead of a child)
+QWidget *parentWidget = d->causedStack.isEmpty() ? p : d->causedStack.last();
+if (parentWidget->parentWidget())
+parentWidget = parentWidget->parentWidget();
+setParent(parentWidget, Qt::Window | Qt::Tool);
+	setAttribute(Qt::WA_DeleteOnClose, true);
+setAttribute(Qt::WA_X11NetWmWindowTypeMenu, true);
+setWindowTitle(p->windowTitle());
+setEnabled(p->isEnabled());
+//QObject::connect(this, SIGNAL(triggered(QAction*)), this, SLOT(onTrigger(QAction*)));
+//QObject::connect(this, SIGNAL(hovered(QAction*)), this, SLOT(onHovered(QAction*)));
+QList<QAction*> items = p->actions();
+for(int i = 0; i < items.count(); i++)
+addAction(items.at(i));
+}
+void syncWithMenu(QMenu *menu, QActionEvent *act)
+{
+Q_D(QTornOffMenu);
+if(menu != d->causedMenu)
+return;
+if (act->type() == QEvent::ActionAdded) {
+insertAction(act->before(), act->action());
+} else if (act->type() == QEvent::ActionRemoved)
+removeAction(act->action());
+}
+void actionEvent(QActionEvent *e)
+{
+QMenu::actionEvent(e);
+setFixedSize(sizeHint());
+}
+public slots:
+void onTrigger(QAction *action) { d_func()->activateAction(action, QAction::Trigger, false); }
+void onHovered(QAction *action) { d_func()->activateAction(action, QAction::Hover, false); }
+private:
+Q_DECLARE_PRIVATE(QTornOffMenu)
+friend class QMenuPrivate;
+};
+void QMenuPrivate::init()
+{
+Q_Q(QMenu);
+#ifndef QT_NO_WHATSTHIS
+q->setAttribute(Qt::WA_CustomWhatsThis);
+#endif
+q->setAttribute(Qt::WA_X11NetWmWindowTypePopupMenu);
+defaultMenuAction = menuAction = new QAction(q);
+menuAction->d_func()->menu = q;
+q->setMouseTracking(q->style()->styleHint(QStyle::SH_Menu_MouseTracking, 0, q));
+if (q->style()->styleHint(QStyle::SH_Menu_Scrollable, 0, q)) {
+scroll = new QMenuPrivate::QMenuScroller;
+scroll->scrollFlags = QMenuPrivate::QMenuScroller::ScrollNone;
+}
+#ifdef QT_SOFTKEYS_ENABLED
+selectAction = QSoftKeyManager::createKeyedAction(QSoftKeyManager::SelectSoftKey, Qt::Key_Select, q);
+cancelAction = QSoftKeyManager::createKeyedAction(QSoftKeyManager::CancelSoftKey, Qt::Key_Back, q);
+selectAction->setVisible(false); // Don't show these in the menu
+cancelAction->setVisible(false);
+q->addAction(selectAction);
+q->addAction(cancelAction);
+#endif
+}
+int QMenuPrivate::scrollerHeight() const
+{
+Q_Q(const QMenu);
+return qMax(QApplication::globalStrut().height(), q->style()->pixelMetric(QStyle::PM_MenuScrollerHeight, 0, q));
+}
+//Windows and KDE allows menus to cover the taskbar, while GNOME and Mac don't
+QRect QMenuPrivate::popupGeometry(const QWidget *widget) const
+{
+#ifdef Q_WS_WIN
+return QApplication::desktop()->screenGeometry(widget);
+#elif defined Q_WS_X11
+if (X11->desktopEnvironment == DE_KDE)
+return QApplication::desktop()->screenGeometry(widget);
+else
+return QApplication::desktop()->availableGeometry(widget);
+#else
+return QApplication::desktop()->availableGeometry(widget);
+#endif
+}
+//Windows and KDE allows menus to cover the taskbar, while GNOME and Mac don't
+QRect QMenuPrivate::popupGeometry(int screen) const
+{
+#ifdef Q_WS_WIN
+return QApplication::desktop()->screenGeometry(screen);
+#elif defined Q_WS_X11
+if (X11->desktopEnvironment == DE_KDE)
+return QApplication::desktop()->screenGeometry(screen);
+else
+return QApplication::desktop()->availableGeometry(screen);
+#else
+return QApplication::desktop()->availableGeometry(screen);
+#endif
+}
+QList<QPointer<QWidget> > QMenuPrivate::calcCausedStack() const
+{
+QList<QPointer<QWidget> > ret;
+for(QWidget *widget = causedPopup.widget; widget; ) {
+ret.append(widget);
+if (QTornOffMenu *qtmenu = qobject_cast<QTornOffMenu*>(widget))
+ret += qtmenu->d_func()->causedStack;
+if (QMenu *qmenu = qobject_cast<QMenu*>(widget))
+widget = qmenu->d_func()->causedPopup.widget;
+else
+break;
+}
+return ret;
+}
+void QMenuPrivate::updateActionRects() const
+{
+Q_Q(const QMenu);
+if (!itemsDirty)
+return;
+q->ensurePolished();
+//let's reinitialize the buffer
+actionRects.resize(actions.count());
+actionRects.fill(QRect());
+//let's try to get the last visible action
+int lastVisibleAction = actions.count() - 1;
+for(;lastVisibleAction >= 0; --lastVisibleAction) {
+const QAction *action = actions.at(lastVisibleAction);
+if (action->isVisible()) {
+//removing trailing separators
+if (action->isSeparator() && collapsibleSeparators)
+continue;
+break;
+}
+}
+int max_column_width = 0,
+dh = popupGeometry(q).height(),
+y = 0;
+QStyle *style = q->style();
+QStyleOption opt;
+opt.init(q);
+const int hmargin = style->pixelMetric(QStyle::PM_MenuHMargin, &opt, q),
+vmargin = style->pixelMetric(QStyle::PM_MenuVMargin, &opt, q),
+icone = style->pixelMetric(QStyle::PM_SmallIconSize, &opt, q);
+const int fw = style->pixelMetric(QStyle::PM_MenuPanelWidth, &opt, q);
+const int deskFw = style->pixelMetric(QStyle::PM_MenuDesktopFrameWidth, &opt, q);
+const int sfcMargin = style->sizeFromContents(QStyle::CT_Menu, &opt, QApplication::globalStrut(), q).width() - QApplication::globalStrut().width();
+const int min_column_width = q->minimumWidth() - (sfcMargin + leftmargin + rightmargin + 2 * (fw + hmargin));
+const int tearoffHeight = tearoff ? style->pixelMetric(QStyle::PM_MenuTearoffHeight, &opt, q) : 0;
+//for compatability now - will have to refactor this away..
+tabWidth = 0;
+maxIconWidth = 0;
+hasCheckableItems = false;
+ncols = 1;
+sloppyAction = 0;
+for (int i = 0; i < actions.count(); ++i) {
+QAction *action = actions.at(i);
+if (action->isSeparator() || !action->isVisible() || widgetItems.at(i))
+continue;
+//..and some members
+hasCheckableItems |= action->isCheckable();
+QIcon is = action->icon();
+if (!is.isNull()) {
+maxIconWidth = qMax<uint>(maxIconWidth, icone + 4);
+}
+}
+//calculate size
+QFontMetrics qfm = q->fontMetrics();
+bool previousWasSeparator = true; // this is true to allow removing the leading separators
+for(int i = 0; i <= lastVisibleAction; i++) {
+QAction *action = actions.at(i);
+if (!action->isVisible() ||
+(collapsibleSeparators && previousWasSeparator && action->isSeparator()))
+continue; // we continue, this action will get an empty QRect
+previousWasSeparator = action->isSeparator();
+//let the style modify the above size..
+QStyleOptionMenuItem opt;
+q->initStyleOption(&opt, action);
+const QFontMetrics &fm = opt.fontMetrics;
+QSize sz;
+if (QWidget *w = widgetItems.at(i)) {
+sz = w->sizeHint().expandedTo(w->minimumSize()).expandedTo(w->minimumSizeHint()).boundedTo(w->maximumSize());
+} else {
+//calc what I think the size is..
+if (action->isSeparator()) {
+sz = QSize(2, 2);
+} else {
+QString s = action->text();
+int t = s.indexOf(QLatin1Char('\t'));
+if (t != -1) {
+tabWidth = qMax(int(tabWidth), qfm.width(s.mid(t+1)));
+s = s.left(t);
+#ifndef QT_NO_SHORTCUT
+} else {
+QKeySequence seq = action->shortcut();
+if (!seq.isEmpty())
+tabWidth = qMax(int(tabWidth), qfm.width(seq));
+#endif
+}
+sz.setWidth(fm.boundingRect(QRect(), Qt::TextSingleLine | Qt::TextShowMnemonic, s).width());
+sz.setHeight(qMax(fm.height(), qfm.height()));
+QIcon is = action->icon();
+if (!is.isNull()) {
+QSize is_sz = QSize(icone, icone);
+if (is_sz.height() > sz.height())
+sz.setHeight(is_sz.height());
+}
+}
+sz = style->sizeFromContents(QStyle::CT_MenuItem, &opt, sz, q);
+}
+if (!sz.isEmpty()) {
+max_column_width = qMax(min_column_width, qMax(max_column_width, sz.width()));
+//wrapping
+if (!scroll &&
+y+sz.height()+vmargin > dh - (deskFw * 2)) {
+ncols++;
+y = vmargin;
+}
+y += sz.height();
+//update the item
+actionRects[i] = QRect(0, 0, sz.width(), sz.height());
+}
+}
+max_column_width += tabWidth; //finally add in the tab width
+//calculate position
+const int base_y = vmargin + fw + topmargin +
+(scroll ? scroll->scrollOffset : 0) +
+tearoffHeight;
+int x = hmargin + fw + leftmargin;
+y = base_y;
+for(int i = 0; i < actions.count(); i++) {
+QRect &rect = actionRects[i];
+if (rect.isNull())
+continue;
+if (!scroll &&
+y+rect.height() > dh - deskFw * 2) {
+x += max_column_width + hmargin;
+y = base_y;
+}
+rect.translate(x, y);                        //move
+rect.setWidth(max_column_width); //uniform width
+//we need to update the widgets geometry
+if (QWidget *widget = widgetItems.at(i)) {
+widget->setGeometry(rect);
+widget->setVisible(actions.at(i)->isVisible());
+}
+y += rect.height();
+}
+itemsDirty = 0;
+}
+QRect QMenuPrivate::actionRect(QAction *act) const
+{
+int index = actions.indexOf(act);
+if (index == -1)
+return QRect();
+updateActionRects();
+//we found the action
+return actionRects.at(index);
+}
+#if defined(Q_WS_MAC)
+static const qreal MenuFadeTimeInSec = 0.150;
+#endif
+void QMenuPrivate::hideUpToMenuBar()
+{
+Q_Q(QMenu);
+bool fadeMenus = q->style()->styleHint(QStyle::SH_Menu_FadeOutOnHide);
+if (!tornoff) {
+QWidget *caused = causedPopup.widget;
+hideMenu(q); //hide after getting causedPopup
+while(caused) {
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(caused)) {
+mb->d_func()->setCurrentAction(0);
+mb->d_func()->setKeyboardMode(false);
+caused = 0;
+} else
+#endif
+if (QMenu *m = qobject_cast<QMenu*>(caused)) {
+caused = m->d_func()->causedPopup.widget;
+if (!m->d_func()->tornoff)
+hideMenu(m, fadeMenus);
+if (!fadeMenus) // Mac doesn't clear the action until after hidden.
+m->d_func()->setCurrentAction(0);
+} else {
+#ifndef QT_NO_TOOLBUTTON
+if (qobject_cast<QToolButton*>(caused) == 0)
+#endif
+qWarning("QMenu: Internal error");
+caused = 0;
+}
+}
+#if defined(Q_WS_MAC)
+if (fadeMenus) {
+QEventLoop eventLoop;
+QTimer::singleShot(int(MenuFadeTimeInSec * 1000), &eventLoop, SLOT(quit()));
+QMacWindowFader::currentFader()->performFade();
+eventLoop.exec();
+}
+#endif
+}
+setCurrentAction(0);
+}
+void QMenuPrivate::hideMenu(QMenu *menu, bool justRegister)
+{
+if (!menu)
+return;
+#if !defined(QT_NO_EFFECTS)
+menu->blockSignals(true);
+aboutToHide = true;
+// Flash item which is about to trigger (if any).
+if (menu->style()->styleHint(QStyle::SH_Menu_FlashTriggeredItem)
+&& currentAction && currentAction == actionAboutToTrigger
+&& menu->actions().contains(currentAction)) {
+QEventLoop eventLoop;
+QAction *activeAction = currentAction;
+menu->setActiveAction(0);
+QTimer::singleShot(60, &eventLoop, SLOT(quit()));
+eventLoop.exec();
+// Select and wait 20 ms.
+menu->setActiveAction(activeAction);
+QTimer::singleShot(20, &eventLoop, SLOT(quit()));
+eventLoop.exec();
+}
+// Fade out.
+if (menu->style()->styleHint(QStyle::SH_Menu_FadeOutOnHide)) {
+// ### Qt 4.4:
+// Should be something like: q->transitionWindow(Qt::FadeOutTransition, MenuFadeTimeInSec);
+// Hopefully we'll integrate qt/research/windowtransitions into main before 4.4.
+// Talk to Richard, Trenton or Bjoern.
+#if defined(Q_WS_MAC)
+if (justRegister) {
+QMacWindowFader::currentFader()->setFadeDuration(MenuFadeTimeInSec);
+QMacWindowFader::currentFader()->registerWindowToFade(menu);
+} else {
+macWindowFade(qt_mac_window_for(menu), MenuFadeTimeInSec);
+}
+#endif // Q_WS_MAC
+}
+aboutToHide = false;
+menu->blockSignals(false);
+#endif // QT_NO_EFFECTS
+if (!justRegister)
+menu->hide();
+}
+void QMenuPrivate::popupAction(QAction *action, int delay, bool activateFirst)
+{
+Q_Q(QMenu);
+if (action && action->isEnabled()) {
+if (!delay)
+q->internalDelayedPopup();
+else
+QMenuPrivate::menuDelayTimer.start(delay, q);
+if (activateFirst && action->menu())
+action->menu()->d_func()->setFirstActionActive();
+} else if (QMenu *menu = activeMenu) {  //hide the current item
+activeMenu = 0;
+hideMenu(menu);
+}
+}
+void QMenuPrivate::setSyncAction()
+{
+Q_Q(QMenu);
+QAction *current = currentAction;
+if(current && (!current->isEnabled() || current->menu() || current->isSeparator()))
+current = 0;
+for(QWidget *caused = q; caused;) {
+if (QMenu *m = qobject_cast<QMenu*>(caused)) {
+caused = m->d_func()->causedPopup.widget;
+if (m->d_func()->eventLoop)
+m->d_func()->syncAction = current; // synchronous operation
+} else {
+break;
+}
+}
+}
+void QMenuPrivate::setFirstActionActive()
+{
+Q_Q(QMenu);
+updateActionRects();
+for(int i = 0, saccum = 0; i < actions.count(); i++) {
+const QRect &rect = actionRects.at(i);
+if (rect.isNull())
+continue;
+if (scroll && scroll->scrollFlags & QMenuScroller::ScrollUp) {
+saccum -= rect.height();
+if (saccum > scroll->scrollOffset - scrollerHeight())
+continue;
+}
+QAction *act = actions.at(i);
+if (!act->isSeparator() &&
+(q->style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, q)
+|| act->isEnabled())) {
+setCurrentAction(act);
+break;
+}
+}
+}
+// popup == -1 means do not popup, 0 means immediately, others mean use a timer
+void QMenuPrivate::setCurrentAction(QAction *action, int popup, SelectionReason reason, bool activateFirst)
+{
+Q_Q(QMenu);
+tearoffHighlighted = 0;
+if (action == currentAction) {
+if (!action || !action->menu() || action->menu() == activeMenu) {
+if(QMenu *menu = qobject_cast<QMenu*>(causedPopup.widget)) {
+if(causedPopup.action && menu->d_func()->activeMenu == q)
+menu->d_func()->setCurrentAction(causedPopup.action, 0, reason, false);
+}
+}
+return;
+}
+if (currentAction)
+q->update(actionRect(currentAction));
+sloppyAction = 0;
+if (!sloppyRegion.isEmpty())
+sloppyRegion = QRegion();
+QMenu *hideActiveMenu = activeMenu;
+#ifndef QT_NO_STATUSTIP
+QAction *previousAction = currentAction;
+#endif
+#ifdef QT3_SUPPORT
+emitHighlighted = action;
+#endif
+currentAction = action;
+if (action) {
+if (!action->isSeparator()) {
+activateAction(action, QAction::Hover);
+if (popup != -1) {
+hideActiveMenu = 0; //will be done "later"
+// if the menu is visible then activate the required action,
+// otherwise we just mark the action as currentAction
+// and activate it when the menu will be popuped.
+if (q->isVisible())
+popupAction(currentAction, popup, activateFirst);
+}
+q->update(actionRect(action));
+if (reason == SelectedFromKeyboard) {
+const int actionIndex = actions.indexOf(action);
+QWidget *widget = widgetItems.at(actionIndex);
+if (widget) {
+if (widget->focusPolicy() != Qt::NoFocus)
+widget->setFocus(Qt::TabFocusReason);
+} else {
+//when the action has no QWidget, the QMenu itself should
+// get the focus
+// Since the menu is a pop-up, it uses the popup reason.
+if (!q->hasFocus()) {
+q->setFocus(Qt::PopupFocusReason);
+}
+}
+}
+} else { //action is a separator
+if (popup != -1)
+hideActiveMenu = 0; //will be done "later"
+}
+#ifndef QT_NO_STATUSTIP
+}  else if (previousAction) {
+QWidget *w = causedPopup.widget;
+while (QMenu *m = qobject_cast<QMenu*>(w))
+w = m->d_func()->causedPopup.widget;
+if (w) {
+QString empty;
+QStatusTipEvent tip(empty);
+QApplication::sendEvent(w, &tip);
+}
+#endif
+}
+if (hideActiveMenu) {
+activeMenu = 0;
+#ifndef QT_NO_EFFECTS
+// kill any running effect
+qFadeEffect(0);
+qScrollEffect(0);
+#endif
+hideMenu(hideActiveMenu);
+}
+}
+QAction *QMenuPrivate::actionAt(QPoint p) const
+{
+if (!q_func()->rect().contains(p))     //sanity check
+return 0;
+for(int i = 0; i < actionRects.count(); i++) {
+if (actionRects.at(i).contains(p))
+return actions.at(i);
+}
+return 0;
+}
+void QMenuPrivate::setOverrideMenuAction(QAction *a)
+{
+Q_Q(QMenu);
+QObject::disconnect(menuAction, SIGNAL(destroyed()), q, SLOT(_q_overrideMenuActionDestroyed()));
+if (a) {
+menuAction = a;
+QObject::connect(a, SIGNAL(destroyed()), q, SLOT(_q_overrideMenuActionDestroyed()));
+} else { //we revert back to the default action created by the QMenu itself
+menuAction = defaultMenuAction;
+}
+}
+void QMenuPrivate::_q_overrideMenuActionDestroyed()
+{
+menuAction=defaultMenuAction;
+}
+/*!
+Returns the action associated with this menu.
+*/
+QAction *QMenu::menuAction() const
+{
+return d_func()->menuAction;
+}
+/*!
+\property QMenu::title
+\brief The title of the menu
+This is equivalent to the QAction::text property of the menuAction().
+By default, this property contains an empty string.
+*/
+QString QMenu::title() const
+{
+return d_func()->menuAction->text();
+}
+void QMenu::setTitle(const QString &text)
+{
+d_func()->menuAction->setText(text);
+}
+/*!
+\property QMenu::icon
+\brief The icon of the menu
+This is equivalent to the QAction::icon property of the menuAction().
+By default, if no icon is explicitly set, this property contains a null icon.
+*/
+QIcon QMenu::icon() const
+{
+return d_func()->menuAction->icon();
+}
+void QMenu::setIcon(const QIcon &icon)
+{
+d_func()->menuAction->setIcon(icon);
+}
+//actually performs the scrolling
+void QMenuPrivate::scrollMenu(QAction *action, QMenuScroller::ScrollLocation location, bool active)
+{
+Q_Q(QMenu);
+if (!scroll || !scroll->scrollFlags)
+return;
+updateActionRects();
+int newOffset = 0;
+const int topScroll = (scroll->scrollFlags & QMenuScroller::ScrollUp)   ? scrollerHeight() : 0;
+const int botScroll = (scroll->scrollFlags & QMenuScroller::ScrollDown) ? scrollerHeight() : 0;
+const int vmargin = q->style()->pixelMetric(QStyle::PM_MenuVMargin, 0, q);
+const int fw = q->style()->pixelMetric(QStyle::PM_MenuPanelWidth, 0, q);
+if (location == QMenuScroller::ScrollTop) {
+for(int i = 0, saccum = 0; i < actions.count(); i++) {
+if (actions.at(i) == action) {
+newOffset = topScroll - saccum;
+break;
+}
+saccum += actionRects.at(i).height();
+}
+} else {
+for(int i = 0, saccum = 0; i < actions.count(); i++) {
+saccum += actionRects.at(i).height();
+if (actions.at(i) == action) {
+if (location == QMenuScroller::ScrollCenter)
+newOffset = ((q->height() / 2) - botScroll) - (saccum - topScroll);
+else
+newOffset = (q->height() - botScroll) - saccum;
+break;
+}
+}
+if(newOffset)
+newOffset -= fw * 2;
+}
+//figure out which scroll flags
+uint newScrollFlags = QMenuScroller::ScrollNone;
+if (newOffset < 0) //easy and cheap one
+newScrollFlags |= QMenuScroller::ScrollUp;
+int saccum = newOffset;
+for(int i = 0; i < actionRects.count(); i++) {
+saccum += actionRects.at(i).height();
+if (saccum > q->height()) {
+newScrollFlags |= QMenuScroller::ScrollDown;
+break;
+}
+}
+if (!(newScrollFlags & QMenuScroller::ScrollDown) && (scroll->scrollFlags & QMenuScroller::ScrollDown)) {
+newOffset = q->height() - (saccum - newOffset) - fw*2 - vmargin;    //last item at bottom
+}
+if (!(newScrollFlags & QMenuScroller::ScrollUp) && (scroll->scrollFlags & QMenuScroller::ScrollUp)) {
+newOffset = 0;  //first item at top
+}
+if (newScrollFlags & QMenuScroller::ScrollUp)
+newOffset -= vmargin;
+QRect screen = popupGeometry(q);
+const int desktopFrame = q->style()->pixelMetric(QStyle::PM_MenuDesktopFrameWidth, 0, q);
+if (q->height() < screen.height()-(desktopFrame*2)-1) {
+QRect geom = q->geometry();
+if (newOffset > scroll->scrollOffset && (scroll->scrollFlags & newScrollFlags & QMenuScroller::ScrollUp)) { //scroll up
+const int newHeight = geom.height()-(newOffset-scroll->scrollOffset);
+if(newHeight > geom.height())
+geom.setHeight(newHeight);
+} else if(scroll->scrollFlags & newScrollFlags & QMenuScroller::ScrollDown) {
+int newTop = geom.top() + (newOffset-scroll->scrollOffset);
+if (newTop < desktopFrame+screen.top())
+newTop = desktopFrame+screen.top();
+if (newTop < geom.top()) {
+geom.setTop(newTop);
+newOffset = 0;
+newScrollFlags &= ~QMenuScroller::ScrollUp;
+}
+}
+if (geom.bottom() > screen.bottom() - desktopFrame)
+geom.setBottom(screen.bottom() - desktopFrame);
+if (geom.top() < desktopFrame+screen.top())
+geom.setTop(desktopFrame+screen.top());
+if (geom != q->geometry()) {
+#if 0
+if (newScrollFlags & QMenuScroller::ScrollDown &&
+q->geometry().top() - geom.top() >= -newOffset)
+newScrollFlags &= ~QMenuScroller::ScrollDown;
+#endif
+q->setGeometry(geom);
+}
+}
+//actually update flags
+const int delta = qMin(0, newOffset) - scroll->scrollOffset; //make sure the new offset is always negative
+if (!itemsDirty && delta) {
+//we've scrolled so we need to update the action rects
+for (int i = 0; i < actionRects.count(); ++i) {
+QRect &current = actionRects[i];
+current.moveTop(current.top() + delta);
+//we need to update the widgets geometry
+if (QWidget *w = widgetItems.at(i))
+w->setGeometry(current);
+}
+}
+scroll->scrollOffset += delta;
+scroll->scrollFlags = newScrollFlags;
+if (active)
+setCurrentAction(action);
+q->update();     //issue an update so we see all the new state..
+}
+void QMenuPrivate::scrollMenu(QMenuScroller::ScrollLocation location, bool active)
+{
+Q_Q(QMenu);
+updateActionRects();
+if(location == QMenuScroller::ScrollBottom) {
+for(int i = actions.size()-1; i >= 0; --i) {
+QAction *act = actions.at(i);
+if (actionRects.at(i).isNull())
+continue;
+if (!act->isSeparator() &&
+(q->style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, q)
+|| act->isEnabled())) {
+if(scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollDown)
+scrollMenu(act, QMenuPrivate::QMenuScroller::ScrollBottom, active);
+else if(active)
+setCurrentAction(act, /*popup*/-1, QMenuPrivate::SelectedFromKeyboard);
+break;
+}
+}
+} else if(location == QMenuScroller::ScrollTop) {
+for(int i = 0; i < actions.size(); ++i) {
+QAction *act = actions.at(i);
+if (actionRects.at(i).isNull())
+continue;
+if (!act->isSeparator() &&
+(q->style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, q)
+|| act->isEnabled())) {
+if(scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)
+scrollMenu(act, QMenuPrivate::QMenuScroller::ScrollTop, active);
+else if(active)
+setCurrentAction(act, /*popup*/-1, QMenuPrivate::SelectedFromKeyboard);
+break;
+}
+}
+}
+}
+//only directional
+void QMenuPrivate::scrollMenu(QMenuScroller::ScrollDirection direction, bool page, bool active)
+{
+Q_Q(QMenu);
+if (!scroll || !(scroll->scrollFlags & direction)) //not really possible...
+return;
+updateActionRects();
+const int topScroll = (scroll->scrollFlags & QMenuScroller::ScrollUp)   ? scrollerHeight() : 0;
+const int botScroll = (scroll->scrollFlags & QMenuScroller::ScrollDown) ? scrollerHeight() : 0;
+const int vmargin = q->style()->pixelMetric(QStyle::PM_MenuVMargin, 0, q);
+const int fw = q->style()->pixelMetric(QStyle::PM_MenuPanelWidth, 0, q);
+const int offset = topScroll ? topScroll-vmargin : 0;
+if (direction == QMenuScroller::ScrollUp) {
+for(int i = 0, saccum = 0; i < actions.count(); i++) {
+saccum -= actionRects.at(i).height();
+if (saccum <= scroll->scrollOffset-offset) {
+scrollMenu(actions.at(i), page ? QMenuScroller::ScrollBottom : QMenuScroller::ScrollTop, active);
+break;
+}
+}
+} else if (direction == QMenuScroller::ScrollDown) {
+bool scrolled = false;
+for(int i = 0, saccum = 0; i < actions.count(); i++) {
+const int iHeight = actionRects.at(i).height();
+saccum -= iHeight;
+if (saccum <= scroll->scrollOffset-offset) {
+const int scrollerArea = q->height() - botScroll - fw*2;
+int visible = (scroll->scrollOffset-offset) - saccum;
+for(i++ ; i < actions.count(); i++) {
+visible += actionRects.at(i).height();
+if (visible > scrollerArea - topScroll) {
+scrolled = true;
+scrollMenu(actions.at(i), page ? QMenuScroller::ScrollTop : QMenuScroller::ScrollBottom, active);
+break;
+}
+}
+break;
+}
+}
+if(!scrolled) {
+scroll->scrollFlags &= ~QMenuScroller::ScrollDown;
+q->update();
+}
+}
+}
+/* This is poor-mans eventfilters. This avoids the use of
+eventFilter (which can be nasty for users of QMenuBar's). */
+bool QMenuPrivate::mouseEventTaken(QMouseEvent *e)
+{
+Q_Q(QMenu);
+QPoint pos = q->mapFromGlobal(e->globalPos());
+if (scroll && !activeMenu) { //let the scroller "steal" the event
+bool isScroll = false;
+if (pos.x() >= 0 && pos.x() < q->width()) {
+for(int dir = QMenuScroller::ScrollUp; dir <= QMenuScroller::ScrollDown; dir = dir << 1) {
+if (scroll->scrollFlags & dir) {
+if (dir == QMenuScroller::ScrollUp)
+isScroll = (pos.y() <= scrollerHeight());
+else if (dir == QMenuScroller::ScrollDown)
+isScroll = (pos.y() >= q->height() - scrollerHeight());
+if (isScroll) {
+scroll->scrollDirection = dir;
+break;
+}
+}
+}
+}
+if (isScroll) {
+scroll->scrollTimer.start(50, q);
+return true;
+} else {
+scroll->scrollTimer.stop();
+}
+}
+if (tearoff) { //let the tear off thingie "steal" the event..
+QRect tearRect(0, 0, q->width(), q->style()->pixelMetric(QStyle::PM_MenuTearoffHeight, 0, q));
+if (scroll && scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)
+tearRect.translate(0, scrollerHeight());
+q->update(tearRect);
+if (tearRect.contains(pos) && hasMouseMoved(e->globalPos())) {
+setCurrentAction(0);
+tearoffHighlighted = 1;
+if (e->type() == QEvent::MouseButtonRelease) {
+if (!tornPopup)
+tornPopup = new QTornOffMenu(q);
+tornPopup->setGeometry(q->geometry());
+tornPopup->show();
+hideUpToMenuBar();
+}
+return true;
+}
+tearoffHighlighted = 0;
+}
+if (q->frameGeometry().contains(e->globalPos())) //otherwise if the event is in our rect we want it..
+return false;
+for(QWidget *caused = causedPopup.widget; caused;) {
+bool passOnEvent = false;
+QWidget *next_widget = 0;
+QPoint cpos = caused->mapFromGlobal(e->globalPos());
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(caused)) {
+passOnEvent = mb->rect().contains(cpos);
+} else
+#endif
+if (QMenu *m = qobject_cast<QMenu*>(caused)) {
+passOnEvent = m->rect().contains(cpos);
+next_widget = m->d_func()->causedPopup.widget;
+}
+if (passOnEvent) {
+if(e->type() != QEvent::MouseButtonRelease || mouseDown == caused) {
+QMouseEvent new_e(e->type(), cpos, e->button(), e->buttons(), e->modifiers());
+QApplication::sendEvent(caused, &new_e);
+return true;
+}
+}
+if (!next_widget)
+break;
+caused = next_widget;
+}
+return false;
+}
+class ExceptionGuard
+{
+public:
+inline ExceptionGuard(bool *w = 0) : watched(w) { Q_ASSERT(!(*watched)); *watched = true; }
+inline ~ExceptionGuard() { *watched = false; }
+inline operator bool() { return *watched; }
+private:
+bool *watched;
+};
+void QMenuPrivate::activateCausedStack(const QList<QPointer<QWidget> > &causedStack, QAction *action, QAction::ActionEvent action_e, bool self)
+{
+ExceptionGuard guard(&activationRecursionGuard);
+#ifdef QT3_SUPPORT
+const int actionId = q_func()->findIdForAction(action);
+#endif
+if(self)
+action->activate(action_e);
+for(int i = 0; i < causedStack.size(); ++i) {
+QPointer<QWidget> widget = causedStack.at(i);
+if (!widget)
+continue;
+//fire
+if (QMenu *qmenu = qobject_cast<QMenu*>(widget)) {
+widget = qmenu->d_func()->causedPopup.widget;
+if (action_e == QAction::Trigger) {
+emit qmenu->triggered(action);
+} else if (action_e == QAction::Hover) {
+emit qmenu->hovered(action);
+#ifdef QT3_SUPPORT
+if (emitHighlighted) {
+emit qmenu->highlighted(actionId);
+emitHighlighted = false;
+}
+#endif
+}
+#ifndef QT_NO_MENUBAR
+} else if (QMenuBar *qmenubar = qobject_cast<QMenuBar*>(widget)) {
+if (action_e == QAction::Trigger) {
+emit qmenubar->triggered(action);
+#ifdef QT3_SUPPORT
+emit qmenubar->activated(actionId);
+#endif
+} else if (action_e == QAction::Hover) {
+emit qmenubar->hovered(action);
+#ifdef QT3_SUPPORT
+if (emitHighlighted) {
+emit qmenubar->highlighted(actionId);
+emitHighlighted = false;
+}
+#endif
+}
+break; //nothing more..
+#endif
+}
+}
+}
+void QMenuPrivate::activateAction(QAction *action, QAction::ActionEvent action_e, bool self)
+{
+Q_Q(QMenu);
+#ifndef QT_NO_WHATSTHIS
+bool inWhatsThisMode = QWhatsThis::inWhatsThisMode();
+#endif
+if (!action || !q->isEnabled()
+|| (action_e == QAction::Trigger
+#ifndef QT_NO_WHATSTHIS
+&& !inWhatsThisMode
+#endif
+&& (action->isSeparator() ||!action->isEnabled())))
+return;
+/* I have to save the caused stack here because it will be undone after popup execution (ie in the hide).
+Then I iterate over the list to actually send the events. --Sam
+*/
+const QList<QPointer<QWidget> > causedStack = calcCausedStack();
+if (action_e == QAction::Trigger) {
+#ifndef QT_NO_WHATSTHIS
+if (!inWhatsThisMode)
+actionAboutToTrigger = action;
+#endif
+if (q->testAttribute(Qt::WA_DontShowOnScreen)) {
+hideUpToMenuBar();
+} else {
+for(QWidget *widget = QApplication::activePopupWidget(); widget; ) {
+if (QMenu *qmenu = qobject_cast<QMenu*>(widget)) {
+if(qmenu == q)
+hideUpToMenuBar();
+widget = qmenu->d_func()->causedPopup.widget;
+} else {
+break;
+}
+}
+}
+#ifndef QT_NO_WHATSTHIS
+if (inWhatsThisMode) {
+QString s = action->whatsThis();
+if (s.isEmpty())
+s = whatsThis;
+QWhatsThis::showText(q->mapToGlobal(actionRect(action).center()), s, q);
+return;
+}
+#endif
+}
+activateCausedStack(causedStack, action, action_e, self);
+if (action_e == QAction::Hover) {
+#ifndef QT_NO_ACCESSIBILITY
+if (QAccessible::isActive()) {
+int actionIndex = indexOf(action) + 1;
+QAccessible::updateAccessibility(q, actionIndex, QAccessible::Focus);
+QAccessible::updateAccessibility(q, actionIndex, QAccessible::Selection);
+}
+#endif
+QWidget *w = causedPopup.widget;
+while (QMenu *m = qobject_cast<QMenu*>(w))
+w = m->d_func()->causedPopup.widget;
+action->showStatusText(w);
+} else {
+actionAboutToTrigger = 0;
+}
+}
+void QMenuPrivate::_q_actionTriggered()
+{
+Q_Q(QMenu);
+if (QAction *action = qobject_cast<QAction *>(q->sender())) {
+#ifdef QT3_SUPPORT
+//we store it here because the action might be deleted/changed by connected slots
+const int id = q->findIdForAction(action);
+#endif
+emit q->triggered(action);
+#ifdef QT3_SUPPORT
+emit q->activated(id);
+#endif
+if (!activationRecursionGuard) {
+//in case the action has not been activated by the mouse
+//we check the parent hierarchy
+QList< QPointer<QWidget> > list;
+for(QWidget *widget = q->parentWidget(); widget; ) {
+if (qobject_cast<QMenu*>(widget)
+#ifndef QT_NO_MENUBAR
+|| qobject_cast<QMenuBar*>(widget)
+#endif
+) {
+list.append(widget);
+widget = widget->parentWidget();
+} else {
+break;
+}
+}
+activateCausedStack(list, action, QAction::Trigger, false);
+}
+}
+}
+void QMenuPrivate::_q_actionHovered()
+{
+Q_Q(QMenu);
+if (QAction * action = qobject_cast<QAction *>(q->sender())) {
+#ifdef QT3_SUPPORT
+//we store it here because the action might be deleted/changed by connected slots
+const int id = q->findIdForAction(action);
+#endif
+emit q->hovered(action);
+#ifdef QT3_SUPPORT
+if (emitHighlighted) {
+emit q->highlighted(id);
+emitHighlighted = false;
+}
+#endif
+}
+}
+bool QMenuPrivate::hasMouseMoved(const QPoint &globalPos)
+{
+//determines if the mouse has moved (ie its intial position has
+//changed by more than QApplication::startDragDistance()
+//or if there were at least 6 mouse motions)
+return motions > 6 ||
+QApplication::startDragDistance() < (mousePopupPos - globalPos).manhattanLength();
+}
+/*!
+Initialize \a option with the values from this menu and information from \a action. This method
+is useful for subclasses when they need a QStyleOptionMenuItem, but don't want
+to fill in all the information themselves.
+\sa QStyleOption::initFrom() QMenuBar::initStyleOption()
+*/
+void QMenu::initStyleOption(QStyleOptionMenuItem *option, const QAction *action) const
+{
+if (!option || !action)
+return;
+Q_D(const QMenu);
+option->initFrom(this);
+option->palette = palette();
+option->state = QStyle::State_None;
+if (window()->isActiveWindow())
+option->state |= QStyle::State_Active;
+if (isEnabled() && action->isEnabled()
+&& (!action->menu() || action->menu()->isEnabled()))
+option->state |= QStyle::State_Enabled;
+else
+option->palette.setCurrentColorGroup(QPalette::Disabled);
+option->font = action->font().resolve(font());
+option->fontMetrics = QFontMetrics(option->font);
+if (d->currentAction && d->currentAction == action && !d->currentAction->isSeparator()) {
+option->state |= QStyle::State_Selected
+| (d->mouseDown ? QStyle::State_Sunken : QStyle::State_None);
+}
+option->menuHasCheckableItems = d->hasCheckableItems;
+if (!action->isCheckable()) {
+option->checkType = QStyleOptionMenuItem::NotCheckable;
+} else {
+option->checkType = (action->actionGroup() && action->actionGroup()->isExclusive())
+? QStyleOptionMenuItem::Exclusive : QStyleOptionMenuItem::NonExclusive;
+option->checked = action->isChecked();
+}
+if (action->menu())
+option->menuItemType = QStyleOptionMenuItem::SubMenu;
+else if (action->isSeparator())
+option->menuItemType = QStyleOptionMenuItem::Separator;
+else if (d->defaultAction == action)
+	    option->menuItemType = QStyleOptionMenuItem::DefaultItem;
+else
+option->menuItemType = QStyleOptionMenuItem::Normal;
+if (action->isIconVisibleInMenu())
+option->icon = action->icon();
+QString textAndAccel = action->text();
+#ifndef QT_NO_SHORTCUT
+if (textAndAccel.indexOf(QLatin1Char('\t')) == -1) {
+QKeySequence seq = action->shortcut();
+if (!seq.isEmpty())
+textAndAccel += QLatin1Char('\t') + QString(seq);
+}
+#endif
+option->text = textAndAccel;
+option->tabWidth = d->tabWidth;
+option->maxIconWidth = d->maxIconWidth;
+option->menuRect = rect();
+}
+/*!
+\class QMenu
+\brief The QMenu class provides a menu widget for use in menu
+bars, context menus, and other popup menus.
+\ingroup mainwindow-classes
+\ingroup basicwidgets
+A menu widget is a selection menu. It can be either a pull-down
+menu in a menu bar or a standalone context menu. Pull-down menus
+are shown by the menu bar when the user clicks on the respective
+item or presses the specified shortcut key. Use
+QMenuBar::addMenu() to insert a menu into a menu bar. Context
+menus are usually invoked by some special keyboard key or by
+right-clicking. They can be executed either asynchronously with
+popup() or synchronously with exec(). Menus can also be invoked in
+response to button presses; these are just like context menus
+except for how they are invoked.
+\raw HTML
+<table align="center" cellpadding="0">
+<tr>
+<td>
+\endraw
+\inlineimage plastique-menu.png
+\raw HTML
+</td>
+<td>
+\endraw
+\inlineimage windowsxp-menu.png
+\raw HTML
+</td>
+<td>
+\endraw
+\inlineimage macintosh-menu.png
+\raw HTML
+</td>
+</tr>
+<tr>
+<td colspan="3">
+\endraw
+A menu shown in \l{Plastique Style Widget Gallery}{Plastique widget style},
+\l{Windows XP Style Widget Gallery}{Windows XP widget style},
+and \l{Macintosh Style Widget Gallery}{Macintosh widget style}.
+\raw HTML
+</td>
+</tr>
+</table>
+\endraw
+\section1 Actions
+A menu consists of a list of action items. Actions are added with
+the addAction(), addActions() and insertAction() functions. An action
+is represented vertically and rendered by QStyle. In addition, actions
+can have a text label, an optional icon drawn on the very left side,
+and shortcut key sequence such as "Ctrl+X".
+The existing actions held by a menu can be found with actions().
+There are four kinds of action items: separators, actions that
+show a submenu, widgets, and actions that perform an action.
+Separators are inserted with addSeparator(), submenus with addMenu(),
+and all other items are considered action items.
+When inserting action items you usually specify a receiver and a
+slot. The receiver will be notifed whenever the item is
+\l{QAction::triggered()}{triggered()}. In addition, QMenu provides
+two signals, activated() and highlighted(), which signal the
+QAction that was triggered from the menu.
+You clear a menu with clear() and remove individual action items
+with removeAction().
+A QMenu can also provide a tear-off menu. A tear-off menu is a
+top-level window that contains a copy of the menu. This makes it
+possible for the user to "tear off" frequently used menus and
+position them in a convenient place on the screen. If you want
+this functionality for a particular menu, insert a tear-off handle
+with setTearOffEnabled(). When using tear-off menus, bear in mind
+that the concept isn't typically used on Microsoft Windows so
+some users may not be familiar with it. Consider using a QToolBar
+instead.
+Widgets can be inserted into menus with the QWidgetAction class.
+Instances of this class are used to hold widgets, and are inserted
+into menus with the addAction() overload that takes a QAction.
+Conversely, actions can be added to widgets with the addAction(),
+addActions() and insertAction() functions.
+\section1 QMenu on Qt for Windows CE
+If a menu is integrated into the native menubar on Windows Mobile we
+do not support the signals: aboutToHide (), aboutToShow () and hovered ().
+It is not possible to display an icon in a native menu on Windows Mobile.
+\section1 QMenu on Mac OS X with Qt build against Cocoa
+QMenu can be inserted only once in a menu/menubar. Subsequent insertions will
+have no effect or will result in a disabled menu item.
+See the \l{mainwindows/menus}{Menus} example for an example of how
+to use QMenuBar and QMenu in your application.
+\bold{Important inherited functions:} addAction(), removeAction(), clear(),
+addSeparator(), and addMenu().
+\sa QMenuBar, {fowler}{GUI Design Handbook: Menu, Drop-Down and Pop-Up},
+{Application Example}, {Menus Example}, {Recent Files Example}
+*/
+/*!
+Constructs a menu with parent \a parent.
+Although a popup menu is always a top-level widget, if a parent is
+passed the popup menu will be deleted when that parent is
+destroyed (as with any other QObject).
+*/
+QMenu::QMenu(QWidget *parent)
+: QWidget(*new QMenuPrivate, parent, Qt::Popup)
+{
+Q_D(QMenu);
+d->init();
+}
+/*!
+Constructs a menu with a \a title and a \a parent.
+Although a popup menu is always a top-level widget, if a parent is
+passed the popup menu will be deleted when that parent is
+destroyed (as with any other QObject).
+\sa title
+*/
+QMenu::QMenu(const QString &title, QWidget *parent)
+: QWidget(*new QMenuPrivate, parent, Qt::Popup)
+{
+Q_D(QMenu);
+d->init();
+d->menuAction->setText(title);
+}
+/*! \internal
+*/
+QMenu::QMenu(QMenuPrivate &dd, QWidget *parent)
+: QWidget(dd, parent, Qt::Popup)
+{
+Q_D(QMenu);
+d->init();
+}
+/*!
+Destroys the menu.
+*/
+QMenu::~QMenu()
+{
+Q_D(QMenu);
+for (int i = 0; i < d->widgetItems.count(); ++i) {
+if (QWidget *widget = d->widgetItems.at(i)) {
+QWidgetAction *action = static_cast<QWidgetAction *>(d->actions.at(i));
+action->releaseWidget(widget);
+d->widgetItems[i] = 0;
+}
+}
+if (d->eventLoop)
+d->eventLoop->exit();
+hideTearOffMenu();
+}
+/*!
+\overload
+This convenience function creates a new action with \a text.
+The function adds the newly created action to the menu's
+list of actions, and returns it.
+\sa QWidget::addAction()
+*/
+QAction *QMenu::addAction(const QString &text)
+{
+QAction *ret = new QAction(text, this);
+addAction(ret);
+return ret;
+}
+/*!
+\overload
+This convenience function creates a new action with an \a icon
+and some \a text. The function adds the newly created action to
+the menu's list of actions, and returns it.
+\sa QWidget::addAction()
+*/
+QAction *QMenu::addAction(const QIcon &icon, const QString &text)
+{
+QAction *ret = new QAction(icon, text, this);
+addAction(ret);
+return ret;
+}
+/*!
+\overload
+This convenience function creates a new action with the text \a
+text and an optional shortcut \a shortcut. The action's
+\l{QAction::triggered()}{triggered()} signal is connected to the
+\a receiver's \a member slot. The function adds the newly created
+action to the menu's list of actions and returns it.
+\sa QWidget::addAction()
+*/
+QAction *QMenu::addAction(const QString &text, const QObject *receiver, const char* member, const QKeySequence &shortcut)
+{
+QAction *action = new QAction(text, this);
+#ifdef QT_NO_SHORTCUT
+Q_UNUSED(shortcut);
+#else
+action->setShortcut(shortcut);
+#endif
+QObject::connect(action, SIGNAL(triggered(bool)), receiver, member);
+addAction(action);
+return action;
+}
+/*!
+\overload
+This convenience function creates a new action with an \a icon and
+some \a text and an optional shortcut \a shortcut. The action's
+\l{QAction::triggered()}{triggered()} signal is connected to the
+\a member slot of the \a receiver object. The function adds the
+newly created action to the menu's list of actions, and returns it.
+\sa QWidget::addAction()
+*/
+QAction *QMenu::addAction(const QIcon &icon, const QString &text, const QObject *receiver,
+const char* member, const QKeySequence &shortcut)
+{
+QAction *action = new QAction(icon, text, this);
+#ifdef QT_NO_SHORTCUT
+Q_UNUSED(shortcut);
+#else
+action->setShortcut(shortcut);
+#endif
+QObject::connect(action, SIGNAL(triggered(bool)), receiver, member);
+addAction(action);
+return action;
+}
+/*!
+This convenience function adds \a menu as a submenu to this menu.
+It returns \a menu's menuAction(). This menu does not take
+ownership of \a menu.
+\sa QWidget::addAction() QMenu::menuAction()
+*/
+QAction *QMenu::addMenu(QMenu *menu)
+{
+QAction *action = menu->menuAction();
+addAction(action);
+return action;
+}
+/*!
+Appends a new QMenu with \a title to the menu. The menu
+takes ownership of the menu. Returns the new menu.
+\sa QWidget::addAction() QMenu::menuAction()
+*/
+QMenu *QMenu::addMenu(const QString &title)
+{
+QMenu *menu = new QMenu(title, this);
+addAction(menu->menuAction());
+return menu;
+}
+/*!
+Appends a new QMenu with \a icon and \a title to the menu. The menu
+takes ownership of the menu. Returns the new menu.
+\sa QWidget::addAction() QMenu::menuAction()
+*/
+QMenu *QMenu::addMenu(const QIcon &icon, const QString &title)
+{
+QMenu *menu = new QMenu(title, this);
+menu->setIcon(icon);
+addAction(menu->menuAction());
+return menu;
+}
+/*!
+This convenience function creates a new separator action, i.e. an
+action with QAction::isSeparator() returning true, and adds the new
+action to this menu's list of actions. It returns the newly
+created action.
+\sa QWidget::addAction()
+*/
+QAction *QMenu::addSeparator()
+{
+QAction *action = new QAction(this);
+action->setSeparator(true);
+addAction(action);
+return action;
+}
+/*!
+This convenience function inserts \a menu before action \a before
+and returns the menus menuAction().
+\sa QWidget::insertAction(), addMenu()
+*/
+QAction *QMenu::insertMenu(QAction *before, QMenu *menu)
+{
+QAction *action = menu->menuAction();
+insertAction(before, action);
+return action;
+}
+/*!
+This convenience function creates a new separator action, i.e. an
+action with QAction::isSeparator() returning true. The function inserts
+the newly created action into this menu's list of actions before
+action \a before and returns it.
+\sa QWidget::insertAction(), addSeparator()
+*/
+QAction *QMenu::insertSeparator(QAction *before)
+{
+QAction *action = new QAction(this);
+action->setSeparator(true);
+insertAction(before, action);
+return action;
+}
+/*!
+This will set the default action to \a act. The default action may
+have a visual queue depending on the current QStyle. A default
+action is usually meant to indicate what will defaultly happen on a
+drop, as shown in a context menu.
+\sa defaultAction()
+*/
+void QMenu::setDefaultAction(QAction *act)
+{
+d_func()->defaultAction = act;
+}
+/*!
+Returns the current default action.
+\sa setDefaultAction()
+*/
+QAction *QMenu::defaultAction() const
+{
+return d_func()->defaultAction;
+}
+/*!
+\property QMenu::tearOffEnabled
+\brief whether the menu supports being torn off
+When true, the menu contains a special tear-off item (often shown as a dashed
+line at the top of the menu) that creates a copy of the menu when it is
+triggered.
+This "torn-off" copy lives in a separate window. It contains the same menu
+items as the original menu, with the exception of the tear-off handle.
+By default, this property is false.
+*/
+void QMenu::setTearOffEnabled(bool b)
+{
+Q_D(QMenu);
+if (d->tearoff == b)
+return;
+if (!b)
+hideTearOffMenu();
+d->tearoff = b;
+d->itemsDirty = true;
+if (isVisible())
+resize(sizeHint());
+}
+bool QMenu::isTearOffEnabled() const
+{
+return d_func()->tearoff;
+}
+/*!
+When a menu is torn off a second menu is shown to display the menu
+contents in a new window. When the menu is in this mode and the menu
+is visible returns true; otherwise false.
+\sa hideTearOffMenu() isTearOffEnabled()
+*/
+bool QMenu::isTearOffMenuVisible() const
+{
+if (d_func()->tornPopup)
+return d_func()->tornPopup->isVisible();
+return false;
+}
+/*!
+This function will forcibly hide the torn off menu making it
+disappear from the users desktop.
+\sa isTearOffMenuVisible() isTearOffEnabled()
+*/
+void QMenu::hideTearOffMenu()
+{
+if (QWidget *w = d_func()->tornPopup)
+w->close();
+}
+/*!
+Sets the currently highlighted action to \a act.
+*/
+void QMenu::setActiveAction(QAction *act)
+{
+Q_D(QMenu);
+d->setCurrentAction(act, 0);
+if (d->scroll)
+d->scrollMenu(act, QMenuPrivate::QMenuScroller::ScrollCenter);
+}
+/*!
+Returns the currently highlighted action, or 0 if no
+action is currently highlighted.
+*/
+QAction *QMenu::activeAction() const
+{
+return d_func()->currentAction;
+}
+/*!
+\since 4.2
+Returns true if there are no visible actions inserted into the menu, false
+otherwise.
+\sa QWidget::actions()
+*/
+bool QMenu::isEmpty() const
+{
+bool ret = true;
+for(int i = 0; ret && i < actions().count(); ++i) {
+const QAction *action = actions().at(i);
+if (!action->isSeparator() && action->isVisible()) {
+ret = false;
+}
+}
+return ret;
+}
+/*!
+Removes all the menu's actions. Actions owned by the menu and not
+shown in any other widget are deleted.
+\sa removeAction()
+*/
+void QMenu::clear()
+{
+QList<QAction*> acts = actions();
+for(int i = 0; i < acts.size(); i++) {
+removeAction(acts[i]);
+if (acts[i]->parent() == this && acts[i]->d_func()->widgets.isEmpty())
+delete acts[i];
+}
+}
+/*!
+If a menu does not fit on the screen it lays itself out so that it
+does fit. It is style dependent what layout means (for example, on
+Windows it will use multiple columns).
+This functions returns the number of columns necessary.
+*/
+int QMenu::columnCount() const
+{
+return d_func()->ncols;
+}
+/*!
+Returns the item at \a pt; returns 0 if there is no item there.
+*/
+QAction *QMenu::actionAt(const QPoint &pt) const
+{
+if (QAction *ret = d_func()->actionAt(pt))
+return ret;
+return 0;
+}
+/*!
+Returns the geometry of action \a act.
+*/
+QRect QMenu::actionGeometry(QAction *act) const
+{
+return d_func()->actionRect(act);
+}
+/*!
+\reimp
+*/
+QSize QMenu::sizeHint() const
+{
+Q_D(const QMenu);
+d->updateActionRects();
+QSize s;
+for (int i = 0; i < d->actionRects.count(); ++i) {
+const QRect &rect = d->actionRects.at(i);
+if (rect.isNull())
+continue;
+if (rect.bottom() >= s.height())
+s.setHeight(rect.y() + rect.height());
+if (rect.right() >= s.width())
+s.setWidth(rect.x() + rect.width());
+}
+// Note that the action rects calculated above already include
+// the top and left margins, so we only need to add margins for
+// the bottom and right.
+QStyleOption opt(0);
+opt.init(this);
+const int fw = style()->pixelMetric(QStyle::PM_MenuPanelWidth, &opt, this);
+s.rwidth() += style()->pixelMetric(QStyle::PM_MenuHMargin, &opt, this) + fw + d->rightmargin;
+s.rheight() += style()->pixelMetric(QStyle::PM_MenuVMargin, &opt, this) + fw + d->bottommargin;
+return style()->sizeFromContents(QStyle::CT_Menu, &opt,
+s.expandedTo(QApplication::globalStrut()), this);
+}
+/*!
+Displays the menu so that the action \a atAction will be at the
+specified \e global position \a p. To translate a widget's local
+coordinates into global coordinates, use QWidget::mapToGlobal().
+When positioning a menu with exec() or popup(), bear in mind that
+you cannot rely on the menu's current size(). For performance
+reasons, the menu adapts its size only when necessary, so in many
+cases, the size before and after the show is different. Instead,
+use sizeHint() which calculates the proper size depending on the
+menu's current contents.
+\sa QWidget::mapToGlobal(), exec()
+*/
+void QMenu::popup(const QPoint &p, QAction *atAction)
+{
+Q_D(QMenu);
+if (d->scroll) { //reset scroll state from last popup
+d->scroll->scrollOffset = 0;
+d->scroll->scrollFlags = QMenuPrivate::QMenuScroller::ScrollNone;
+}
+d->tearoffHighlighted = 0;
+d->motions = 0;
+d->doChildEffects = true;
+#ifndef QT_NO_MENUBAR
+// if this menu is part of a chain attached to a QMenuBar, set the
+// _NET_WM_WINDOW_TYPE_DROPDOWN_MENU X11 window type
+QWidget* top = this;
+while (QMenu* m = qobject_cast<QMenu *>(top))
+top = m->d_func()->causedPopup.widget;
+setAttribute(Qt::WA_X11NetWmWindowTypeDropDownMenu, qobject_cast<QMenuBar *>(top) != 0);
+#endif
+ensurePolished(); // Get the right font
+emit aboutToShow();
+d->updateActionRects();
+QPoint pos = p;
+QSize size = sizeHint();
+QRect screen;
+#ifndef QT_NO_GRAPHICSVIEW
+bool isEmbedded = d->nearestGraphicsProxyWidget(this);
+if (isEmbedded)
+screen = d->popupGeometry(this);
+else
+#endif
+screen = d->popupGeometry(QApplication::desktop()->screenNumber(p));
+const int desktopFrame = style()->pixelMetric(QStyle::PM_MenuDesktopFrameWidth, 0, this);
+bool adjustToDesktop = !window()->testAttribute(Qt::WA_DontShowOnScreen);
+#ifdef QT_KEYPAD_NAVIGATION
+if (!atAction && QApplication::keypadNavigationEnabled()) {
+// Try to have one item activated
+if (d->defaultAction && d->defaultAction->isEnabled()) {
+atAction = d->defaultAction;
+// TODO: This works for first level menus, not yet sub menus
+} else {
+foreach (QAction *action, d->actions)
+if (action->isEnabled()) {
+atAction = action;
+break;
+}
+}
+d->currentAction = atAction;
+}
+#endif
+if (d->ncols > 1) {
+pos.setY(screen.top()+desktopFrame);
+} else if (atAction) {
+for(int i = 0, above_height = 0; i < d->actions.count(); i++) {
+QAction *action = d->actions.at(i);
+if (action == atAction) {
+int newY = pos.y() - above_height;
+if (d->scroll && newY < desktopFrame) {
+d->scroll->scrollFlags = d->scroll->scrollFlags
+| QMenuPrivate::QMenuScroller::ScrollUp;
+d->scroll->scrollOffset = newY;
+newY = desktopFrame;
+}
+pos.setY(newY);
+if (d->scroll && d->scroll->scrollFlags != QMenuPrivate::QMenuScroller::ScrollNone
+&& !style()->styleHint(QStyle::SH_Menu_FillScreenWithScroll, 0, this)) {
+int below_height = above_height + d->scroll->scrollOffset;
+for(int i2 = i; i2 < d->actionRects.count(); i2++)
+below_height += d->actionRects.at(i2).height();
+size.setHeight(below_height);
+}
+break;
+} else {
+above_height += d->actionRects.at(i).height();
+}
+}
+}
+QPoint mouse = QCursor::pos();
+d->mousePopupPos = mouse;
+const bool snapToMouse = (QRect(p.x()-3, p.y()-3, 6, 6).contains(mouse));
+if (adjustToDesktop) {
+//handle popup falling "off screen"
+if (isRightToLeft()) {
+if(snapToMouse) //position flowing left from the mouse
+pos.setX(mouse.x()-size.width());
+if (pos.x() < screen.left()+desktopFrame)
+pos.setX(qMax(p.x(), screen.left()+desktopFrame));
+if (pos.x()+size.width()-1 > screen.right()-desktopFrame)
+pos.setX(qMax(p.x()-size.width(), screen.right()-desktopFrame-size.width()+1));
+} else {
+if (pos.x()+size.width()-1 > screen.right()-desktopFrame)
+pos.setX(qMin(p.x()+size.width(), screen.right()-desktopFrame-size.width()+1));
+if (pos.x() < screen.left()+desktopFrame)
+pos.setX(qMax(p.x(), screen.left() + desktopFrame));
+}
+if (pos.y() + size.height() - 1 > screen.bottom() - desktopFrame) {
+if(snapToMouse)
+pos.setY(qMin(mouse.y() - (size.height() + desktopFrame), screen.bottom()-desktopFrame-size.height()+1));
+else
+pos.setY(qMax(p.y() - (size.height() + desktopFrame), screen.bottom()-desktopFrame-size.height()+1));
+} else if (pos.y() < screen.top() + desktopFrame) {
+pos.setY(screen.top() + desktopFrame);
+}
+if (pos.y() < screen.top() + desktopFrame)
+pos.setY(screen.top() + desktopFrame);
+if (pos.y()+size.height()-1 > screen.bottom() - desktopFrame) {
+if (d->scroll) {
+d->scroll->scrollFlags |= uint(QMenuPrivate::QMenuScroller::ScrollDown);
+int y = qMax(screen.y(),pos.y());
+size.setHeight(screen.bottom()-(desktopFrame*2)-y);
+} else {
+// Too big for screen, bias to see bottom of menu (for some reason)
+pos.setY(screen.bottom()-size.height()+1);
+}
+}
+}
+setGeometry(QRect(pos, size));
+#ifndef QT_NO_EFFECTS
+int hGuess = isRightToLeft() ? QEffects::LeftScroll : QEffects::RightScroll;
+int vGuess = QEffects::DownScroll;
+if (isRightToLeft()) {
+if ((snapToMouse && (pos.x() + size.width()/2 > mouse.x())) ||
+(qobject_cast<QMenu*>(d->causedPopup.widget) && pos.x() + size.width()/2 > d->causedPopup.widget->x()))
+hGuess = QEffects::RightScroll;
+} else {
+if ((snapToMouse && (pos.x() + size.width()/2 < mouse.x())) ||
+(qobject_cast<QMenu*>(d->causedPopup.widget) && pos.x() + size.width()/2 < d->causedPopup.widget->x()))
+hGuess = QEffects::LeftScroll;
+}
+#ifndef QT_NO_MENUBAR
+if ((snapToMouse && (pos.y() + size.height()/2 < mouse.y())) ||
+(qobject_cast<QMenuBar*>(d->causedPopup.widget) &&
+pos.y() + size.width()/2 < d->causedPopup.widget->mapToGlobal(d->causedPopup.widget->pos()).y()))
+vGuess = QEffects::UpScroll;
+#endif
+if (QApplication::isEffectEnabled(Qt::UI_AnimateMenu)) {
+bool doChildEffects = true;
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(d->causedPopup.widget)) {
+doChildEffects = mb->d_func()->doChildEffects;
+mb->d_func()->doChildEffects = false;
+} else
+#endif
+if (QMenu *m = qobject_cast<QMenu*>(d->causedPopup.widget)) {
+doChildEffects = m->d_func()->doChildEffects;
+m->d_func()->doChildEffects = false;
+}
+if (doChildEffects) {
+if (QApplication::isEffectEnabled(Qt::UI_FadeMenu))
+qFadeEffect(this);
+else if (d->causedPopup.widget)
+qScrollEffect(this, qobject_cast<QMenu*>(d->causedPopup.widget) ? hGuess : vGuess);
+else
+qScrollEffect(this, hGuess | vGuess);
+} else {
+// kill any running effect
+qFadeEffect(0);
+qScrollEffect(0);
+show();
+}
+} else
+#endif
+{
+show();
+}
+#ifndef QT_NO_ACCESSIBILITY
+QAccessible::updateAccessibility(this, 0, QAccessible::PopupMenuStart);
+#endif
+}
+/*!
+Executes this menu synchronously.
+This is equivalent to \c{exec(pos())}.
+This returns the triggered QAction in either the popup menu or one
+of its submenus, or 0 if no item was triggered (normally because
+the user pressed Esc).
+In most situations you'll want to specify the position yourself,
+for example, the current mouse position:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 0
+or aligned to a widget:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 1
+or in reaction to a QMouseEvent *e:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 2
+*/
+QAction *QMenu::exec()
+{
+return exec(pos());
+}
+/*!
+\overload
+Executes this menu synchronously.
+Pops up the menu so that the action \a action will be at the
+specified \e global position \a p. To translate a widget's local
+coordinates into global coordinates, use QWidget::mapToGlobal().
+This returns the triggered QAction in either the popup menu or one
+of its submenus, or 0 if no item was triggered (normally because
+the user pressed Esc).
+Note that all signals are emitted as usual. If you connect a
+QAction to a slot and call the menu's exec(), you get the result
+both via the signal-slot connection and in the return value of
+exec().
+Common usage is to position the menu at the current mouse
+position:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 3
+or aligned to a widget:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 4
+or in reaction to a QMouseEvent *e:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 5
+When positioning a menu with exec() or popup(), bear in mind that
+you cannot rely on the menu's current size(). For performance
+reasons, the menu adapts its size only when necessary. So in many
+cases, the size before and after the show is different. Instead,
+use sizeHint() which calculates the proper size depending on the
+menu's current contents.
+\sa popup(), QWidget::mapToGlobal()
+*/
+QAction *QMenu::exec(const QPoint &p, QAction *action)
+{
+Q_D(QMenu);
+createWinId();
+QEventLoop eventLoop;
+d->eventLoop = &eventLoop;
+popup(p, action);
+QPointer<QObject> guard = this;
+(void) eventLoop.exec();
+if (guard.isNull())
+return 0;
+action = d->syncAction;
+d->syncAction = 0;
+d->eventLoop = 0;
+return action;
+}
+/*!
+\overload
+Executes a menu synchronously.
+The menu's actions are specified by the list of \a actions. The menu will
+pop up so that the specified action, \a at, appears at global position \a
+pos. If \a at is not specified then the menu appears at position \a
+pos. \a parent is the menu's parent widget; specifying the parent will
+provide context when \a pos alone is not enough to decide where the menu
+should go (e.g., with multiple desktops or when the parent is embedded in
+QGraphicsView).
+The function returns the triggered QAction in either the popup
+menu or one of its submenus, or 0 if no item was triggered
+(normally because the user pressed Esc).
+This is equivalent to:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 6
+\sa popup(), QWidget::mapToGlobal()
+*/
+QAction *QMenu::exec(QList<QAction*> actions, const QPoint &pos, QAction *at, QWidget *parent)
+{
+QMenu menu(parent);
+menu.addActions(actions);
+return menu.exec(pos, at);
+}
+/*!
+\overload
+Executes a menu synchronously.
+The menu's actions are specified by the list of \a actions. The menu
+will pop up so that the specified action, \a at, appears at global
+position \a pos. If \a at is not specified then the menu appears
+at position \a pos.
+The function returns the triggered QAction in either the popup
+menu or one of its submenus, or 0 if no item was triggered
+(normally because the user pressed Esc).
+This is equivalent to:
+\snippet doc/src/snippets/code/src_gui_widgets_qmenu.cpp 6
+\sa popup(), QWidget::mapToGlobal()
+*/
+QAction *QMenu::exec(QList<QAction*> actions, const QPoint &pos, QAction *at)
+{
+// ### Qt 5: merge
+return exec(actions, pos, at, 0);
+}
+/*!
+\reimp
+*/
+void QMenu::hideEvent(QHideEvent *)
+{
+Q_D(QMenu);
+emit aboutToHide();
+if (d->eventLoop)
+d->eventLoop->exit();
+d->setCurrentAction(0);
+#ifndef QT_NO_ACCESSIBILITY
+QAccessible::updateAccessibility(this, 0, QAccessible::PopupMenuEnd);
+#endif
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(d->causedPopup.widget))
+mb->d_func()->setCurrentAction(0);
+#endif
+d->mouseDown = 0;
+d->hasHadMouse = false;
+d->causedPopup.widget = 0;
+d->causedPopup.action = 0;
+if (d->scroll)
+d->scroll->scrollTimer.stop(); //make sure the timer stops
+}
+/*!
+\reimp
+*/
+void QMenu::paintEvent(QPaintEvent *e)
+{
+Q_D(QMenu);
+d->updateActionRects();
+QPainter p(this);
+QRegion emptyArea = QRegion(rect());
+QStyleOptionMenuItem menuOpt;
+menuOpt.initFrom(this);
+menuOpt.state = QStyle::State_None;
+menuOpt.checkType = QStyleOptionMenuItem::NotCheckable;
+menuOpt.maxIconWidth = 0;
+menuOpt.tabWidth = 0;
+style()->drawPrimitive(QStyle::PE_PanelMenu, &menuOpt, &p, this);
+//draw the items that need updating..
+for (int i = 0; i < d->actions.count(); ++i) {
+QAction *action = d->actions.at(i);
+QRect adjustedActionRect = d->actionRects.at(i);
+if (!e->rect().intersects(adjustedActionRect)
+|| d->widgetItems.at(i))
+continue;
+//set the clip region to be extra safe (and adjust for the scrollers)
+QRegion adjustedActionReg(adjustedActionRect);
+emptyArea -= adjustedActionReg;
+p.setClipRegion(adjustedActionReg);
+QStyleOptionMenuItem opt;
+initStyleOption(&opt, action);
+opt.rect = adjustedActionRect;
+style()->drawControl(QStyle::CE_MenuItem, &opt, &p, this);
+}
+const int fw = style()->pixelMetric(QStyle::PM_MenuPanelWidth, 0, this);
+//draw the scroller regions..
+if (d->scroll) {
+menuOpt.menuItemType = QStyleOptionMenuItem::Scroller;
+menuOpt.state |= QStyle::State_Enabled;
+if (d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp) {
+menuOpt.rect.setRect(fw, fw, width() - (fw * 2), d->scrollerHeight());
+emptyArea -= QRegion(menuOpt.rect);
+p.setClipRect(menuOpt.rect);
+style()->drawControl(QStyle::CE_MenuScroller, &menuOpt, &p, this);
+}
+if (d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollDown) {
+menuOpt.rect.setRect(fw, height() - d->scrollerHeight() - fw, width() - (fw * 2),
+d->scrollerHeight());
+emptyArea -= QRegion(menuOpt.rect);
+menuOpt.state |= QStyle::State_DownArrow;
+p.setClipRect(menuOpt.rect);
+style()->drawControl(QStyle::CE_MenuScroller, &menuOpt, &p, this);
+}
+}
+//paint the tear off..
+if (d->tearoff) {
+menuOpt.menuItemType = QStyleOptionMenuItem::TearOff;
+menuOpt.rect.setRect(fw, fw, width() - (fw * 2),
+style()->pixelMetric(QStyle::PM_MenuTearoffHeight, 0, this));
+if (d->scroll && d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)
+menuOpt.rect.translate(0, d->scrollerHeight());
+emptyArea -= QRegion(menuOpt.rect);
+p.setClipRect(menuOpt.rect);
+menuOpt.state = QStyle::State_None;
+if (d->tearoffHighlighted)
+menuOpt.state |= QStyle::State_Selected;
+style()->drawControl(QStyle::CE_MenuTearoff, &menuOpt, &p, this);
+}
+//draw border
+if (fw) {
+QRegion borderReg;
+borderReg += QRect(0, 0, fw, height()); //left
+borderReg += QRect(width()-fw, 0, fw, height()); //right
+borderReg += QRect(0, 0, width(), fw); //top
+borderReg += QRect(0, height()-fw, width(), fw); //bottom
+p.setClipRegion(borderReg);
+emptyArea -= borderReg;
+QStyleOptionFrame frame;
+frame.rect = rect();
+frame.palette = palette();
+frame.state = QStyle::State_None;
+frame.lineWidth = style()->pixelMetric(QStyle::PM_MenuPanelWidth);
+frame.midLineWidth = 0;
+style()->drawPrimitive(QStyle::PE_FrameMenu, &frame, &p, this);
+}
+//finally the rest of the space
+p.setClipRegion(emptyArea);
+menuOpt.state = QStyle::State_None;
+menuOpt.menuItemType = QStyleOptionMenuItem::EmptyArea;
+menuOpt.checkType = QStyleOptionMenuItem::NotCheckable;
+menuOpt.rect = rect();
+menuOpt.menuRect = rect();
+style()->drawControl(QStyle::CE_MenuEmptyArea, &menuOpt, &p, this);
+}
+#ifndef QT_NO_WHEELEVENT
+/*!
+\reimp
+*/
+void QMenu::wheelEvent(QWheelEvent *e)
+{
+Q_D(QMenu);
+if (d->scroll && rect().contains(e->pos()))
+d->scrollMenu(e->delta() > 0 ?
+QMenuPrivate::QMenuScroller::ScrollUp : QMenuPrivate::QMenuScroller::ScrollDown);
+}
+#endif
+/*!
+\reimp
+*/
+void QMenu::mousePressEvent(QMouseEvent *e)
+{
+Q_D(QMenu);
+if (d->aboutToHide || d->mouseEventTaken(e))
+return;
+if (!rect().contains(e->pos())) {
+if (d->noReplayFor
+&& QRect(d->noReplayFor->mapToGlobal(QPoint()), d->noReplayFor->size()).contains(e->globalPos()))
+setAttribute(Qt::WA_NoMouseReplay);
+if (d->eventLoop) // synchronous operation
+d->syncAction = 0;
+d->hideUpToMenuBar();
+return;
+}
+d->mouseDown = this;
+QAction *action = d->actionAt(e->pos());
+d->setCurrentAction(action, 20);
+update();
+}
+/*!
+\reimp
+*/
+void QMenu::mouseReleaseEvent(QMouseEvent *e)
+{
+Q_D(QMenu);
+if (d->aboutToHide || d->mouseEventTaken(e))
+return;
+if(d->mouseDown != this) {
+d->mouseDown = 0;
+return;
+}
+d->mouseDown = 0;
+d->setSyncAction();
+QAction *action = d->actionAt(e->pos());
+if (action && action == d->currentAction) {
+if (action->menu())
+action->menu()->d_func()->setFirstActionActive();
+else {
+#if defined(Q_WS_WIN) && !defined(QT_NO_MENUBAR)
+//On Windows only context menus can be activated with the right button
+bool isContextMenu = true;
+const QWidget *cause = d->causedPopup.widget;
+while (cause) {
+//if the popup was caused by either QMenuBar or a QToolButton, it is not a context menu
+if (qobject_cast<const QMenuBar *>(cause) || qobject_cast<const QToolButton *>(cause)) {
+isContextMenu = false;
+break;
+} else if (const QMenu *menu = qobject_cast<const QMenu *>(cause)) {
+cause = menu->d_func()->causedPopup.widget;
+} else {
+break;
+}
+}
+if (e->button() == Qt::LeftButton || isContextMenu)
+#endif
+d->activateAction(action, QAction::Trigger);
+}
+} else if (d->hasMouseMoved(e->globalPos())) {
+d->hideUpToMenuBar();
+}
+}
+/*!
+\reimp
+*/
+void QMenu::changeEvent(QEvent *e)
+{
+Q_D(QMenu);
+if (e->type() == QEvent::StyleChange || e->type() == QEvent::FontChange ||
+e->type() == QEvent::LayoutDirectionChange) {
+d->itemsDirty = 1;
+setMouseTracking(style()->styleHint(QStyle::SH_Menu_MouseTracking, 0, this));
+if (isVisible())
+resize(sizeHint());
+if (!style()->styleHint(QStyle::SH_Menu_Scrollable, 0, this)) {
+delete d->scroll;
+d->scroll = 0;
+} else if (!d->scroll) {
+d->scroll = new QMenuPrivate::QMenuScroller;
+d->scroll->scrollFlags = QMenuPrivate::QMenuScroller::ScrollNone;
+}
+} else if (e->type() == QEvent::EnabledChange) {
+if (d->tornPopup) // torn-off menu
+d->tornPopup->setEnabled(isEnabled());
+d->menuAction->setEnabled(isEnabled());
+#ifdef Q_WS_MAC
+if (d->mac_menu)
+d->setMacMenuEnabled(isEnabled());
+#endif
+}
+QWidget::changeEvent(e);
+}
+/*!
+\reimp
+*/
+bool
+QMenu::event(QEvent *e)
+{
+Q_D(QMenu);
+switch (e->type()) {
+case QEvent::ShortcutOverride: {
+QKeyEvent *kev = static_cast<QKeyEvent*>(e);
+if (kev->key() == Qt::Key_Up || kev->key() == Qt::Key_Down
+|| kev->key() == Qt::Key_Left || kev->key() == Qt::Key_Right
+|| kev->key() == Qt::Key_Enter || kev->key() == Qt::Key_Return
+|| kev->key() == Qt::Key_Escape) {
+e->accept();
+return true;
+}
+}
+break;
+case QEvent::KeyPress: {
+QKeyEvent *ke = (QKeyEvent*)e;
+if (ke->key() == Qt::Key_Tab || ke->key() == Qt::Key_Backtab) {
+keyPressEvent(ke);
+return true;
+}
+} break;
+case QEvent::ContextMenu:
+if(QMenuPrivate::menuDelayTimer.isActive()) {
+QMenuPrivate::menuDelayTimer.stop();
+internalDelayedPopup();
+}
+break;
+case QEvent::Resize: {
+QStyleHintReturnMask menuMask;
+QStyleOption option;
+option.initFrom(this);
+if (style()->styleHint(QStyle::SH_Menu_Mask, &option, this, &menuMask)) {
+setMask(menuMask.region);
+}
+d->itemsDirty = 1;
+d->updateActionRects();
+break; }
+case QEvent::Show:
+d->mouseDown = 0;
+d->updateActionRects();
+if (d->currentAction)
+d->popupAction(d->currentAction, 0, false);
+break;
+#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 QMenu::focusNextPrevChild(bool next)
+{
+setFocus();
+QKeyEvent ev(QEvent::KeyPress, next ? Qt::Key_Tab : Qt::Key_Backtab, Qt::NoModifier);
+keyPressEvent(&ev);
+return true;
+}
+/*!
+\reimp
+*/
+void QMenu::keyPressEvent(QKeyEvent *e)
+{
+Q_D(QMenu);
+d->updateActionRects();
+int key = e->key();
+if (isRightToLeft()) {  // in reverse mode open/close key for submenues are reversed
+if (key == Qt::Key_Left)
+key = Qt::Key_Right;
+else if (key == Qt::Key_Right)
+key = Qt::Key_Left;
+}
+#ifndef Q_WS_MAC
+if (key == Qt::Key_Tab) //means down
+key = Qt::Key_Down;
+if (key == Qt::Key_Backtab) //means up
+key = Qt::Key_Up;
+#endif
+bool key_consumed = false;
+switch(key) {
+case Qt::Key_Home:
+key_consumed = true;
+if (d->scroll)
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollTop, true);
+break;
+case Qt::Key_End:
+key_consumed = true;
+if (d->scroll)
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollBottom, true);
+break;
+case Qt::Key_PageUp:
+key_consumed = true;
+if (d->currentAction && d->scroll) {
+if(d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollUp, true, true);
+else
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollTop, true);
+}
+break;
+case Qt::Key_PageDown:
+key_consumed = true;
+if (d->currentAction && d->scroll) {
+if(d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollDown)
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollDown, true, true);
+else
+d->scrollMenu(QMenuPrivate::QMenuScroller::ScrollBottom, true);
+}
+break;
+case Qt::Key_Up:
+case Qt::Key_Down: {
+key_consumed = true;
+QAction *nextAction = 0;
+QMenuPrivate::QMenuScroller::ScrollLocation scroll_loc = QMenuPrivate::QMenuScroller::ScrollStay;
+if (!d->currentAction) {
+if(key == Qt::Key_Down) {
+for(int i = 0; i < d->actions.count(); ++i) {
+QAction *act = d->actions.at(i);
+if (d->actionRects.at(i).isNull())
+continue;
+if (!act->isSeparator() &&
+(style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, this)
+|| act->isEnabled())) {
+nextAction = act;
+break;
+}
+}
+} else {
+for(int i = d->actions.count()-1; i >= 0; --i) {
+QAction *act = d->actions.at(i);
+if (d->actionRects.at(i).isNull())
+continue;
+if (!act->isSeparator() &&
+(style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, this)
+|| act->isEnabled())) {
+nextAction = act;
+break;
+}
+}
+}
+} else {
+for(int i = 0, y = 0; !nextAction && i < d->actions.count(); i++) {
+QAction *act = d->actions.at(i);
+if (act == d->currentAction) {
+if (key == Qt::Key_Up) {
+for(int next_i = i-1; true; next_i--) {
+if (next_i == -1) {
+if(!style()->styleHint(QStyle::SH_Menu_SelectionWrap, 0, this))
+break;
+if (d->scroll)
+scroll_loc = QMenuPrivate::QMenuScroller::ScrollBottom;
+next_i = d->actionRects.count()-1;
+}
+QAction *next = d->actions.at(next_i);
+if (next == d->currentAction)
+break;
+if (d->actionRects.at(next_i).isNull())
+continue;
+if (next->isSeparator() ||
+(!next->isEnabled() &&
+!style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, this)))
+continue;
+nextAction = next;
+if (d->scroll && (d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)) {
+int topVisible = d->scrollerHeight();
+if (d->tearoff)
+topVisible += style()->pixelMetric(QStyle::PM_MenuTearoffHeight, 0, this);
+if (((y + d->scroll->scrollOffset) - topVisible) <= d->actionRects.at(next_i).height())
+scroll_loc = QMenuPrivate::QMenuScroller::ScrollTop;
+}
+break;
+}
+if (!nextAction && d->tearoff)
+d->tearoffHighlighted = 1;
+} else {
+y += d->actionRects.at(i).height();
+for(int next_i = i+1; true; next_i++) {
+if (next_i == d->actionRects.count()) {
+if(!style()->styleHint(QStyle::SH_Menu_SelectionWrap, 0, this))
+break;
+if (d->scroll)
+scroll_loc = QMenuPrivate::QMenuScroller::ScrollTop;
+next_i = 0;
+}
+QAction *next = d->actions.at(next_i);
+if (next == d->currentAction)
+break;
+if (d->actionRects.at(next_i).isNull())
+continue;
+if (next->isSeparator() ||
+(!next->isEnabled() &&
+!style()->styleHint(QStyle::SH_Menu_AllowActiveAndDisabled, 0, this)))
+continue;
+nextAction = next;
+if (d->scroll && (d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollDown)) {
+int bottomVisible = height() - d->scrollerHeight();
+if (d->scroll->scrollFlags & QMenuPrivate::QMenuScroller::ScrollUp)
+bottomVisible -= d->scrollerHeight();
+if (d->tearoff)
+bottomVisible -= style()->pixelMetric(QStyle::PM_MenuTearoffHeight, 0, this);
+if ((y + d->scroll->scrollOffset + d->actionRects.at(next_i).height()) > bottomVisible)
+scroll_loc = QMenuPrivate::QMenuScroller::ScrollBottom;
+}
+break;
+}
+}
+break;
+}
+y += d->actionRects.at(i).height();
+}
+}
+if (nextAction) {
+if (d->scroll && scroll_loc != QMenuPrivate::QMenuScroller::ScrollStay) {
+d->scroll->scrollTimer.stop();
+d->scrollMenu(nextAction, scroll_loc);
+}
+d->setCurrentAction(nextAction, /*popup*/-1, QMenuPrivate::SelectedFromKeyboard);
+}
+break; }
+case Qt::Key_Right:
+if (d->currentAction && d->currentAction->isEnabled() && d->currentAction->menu()) {
+d->popupAction(d->currentAction, 0, true);
+key_consumed = true;
+break;
+}
+//FALL THROUGH
+case Qt::Key_Left: {
+if (d->currentAction && !d->scroll) {
+QAction *nextAction = 0;
+if (key == Qt::Key_Left) {
+QRect actionR = d->actionRect(d->currentAction);
+for(int x = actionR.left()-1; !nextAction && x >= 0; x--)
+nextAction = d->actionAt(QPoint(x, actionR.center().y()));
+} else {
+QRect actionR = d->actionRect(d->currentAction);
+for(int x = actionR.right()+1; !nextAction && x < width(); x++)
+nextAction = d->actionAt(QPoint(x, actionR.center().y()));
+}
+if (nextAction) {
+d->setCurrentAction(nextAction, /*popup*/-1, QMenuPrivate::SelectedFromKeyboard);
+key_consumed = true;
+}
+}
+if (!key_consumed && key == Qt::Key_Left && qobject_cast<QMenu*>(d->causedPopup.widget)) {
+QPointer<QWidget> caused = d->causedPopup.widget;
+d->hideMenu(this);
+if (caused)
+caused->setFocus();
+key_consumed = true;
+}
+break; }
+case Qt::Key_Alt:
+if (d->tornoff)
+break;
+key_consumed = true;
+if (style()->styleHint(QStyle::SH_MenuBar_AltKeyNavigation, 0, this))
+{
+d->hideMenu(this);
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(QApplication::focusWidget())) {
+mb->d_func()->setKeyboardMode(false);
+}
+#endif
+}
+break;
+case Qt::Key_Escape:
+#ifdef QT_KEYPAD_NAVIGATION
+case Qt::Key_Back:
+#endif
+key_consumed = true;
+if (d->tornoff) {
+close();
+return;
+}
+{
+QPointer<QWidget> caused = d->causedPopup.widget;
+d->hideMenu(this); // hide after getting causedPopup
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(caused)) {
+mb->d_func()->setCurrentAction(d->menuAction);
+mb->d_func()->setKeyboardMode(true);
+}
+#endif
+}
+break;
+case Qt::Key_Space:
+if (!style()->styleHint(QStyle::SH_Menu_SpaceActivatesItem, 0, this))
+break;
+// for motif, fall through
+#ifdef QT_KEYPAD_NAVIGATION
+case Qt::Key_Select:
+#endif
+case Qt::Key_Return:
+case Qt::Key_Enter: {
+if (!d->currentAction) {
+d->setFirstActionActive();
+key_consumed = true;
+break;
+}
+d->setSyncAction();
+if (d->currentAction->menu())
+d->popupAction(d->currentAction, 0, true);
+else
+d->activateAction(d->currentAction, QAction::Trigger);
+key_consumed = true;
+break; }
+#ifndef QT_NO_WHATSTHIS
+case Qt::Key_F1:
+if (!d->currentAction || d->currentAction->whatsThis().isNull())
+break;
+QWhatsThis::enterWhatsThisMode();
+d->activateAction(d->currentAction, QAction::Trigger);
+return;
+#endif
+default:
+key_consumed = false;
+}
+if (!key_consumed) {                                // send to menu bar
+if ((!e->modifiers() || e->modifiers() == Qt::AltModifier || e->modifiers() == Qt::ShiftModifier) &&
+e->text().length()==1) {
+bool activateAction = false;
+QAction *nextAction = 0;
+if (style()->styleHint(QStyle::SH_Menu_KeyboardSearch, 0, this) && !e->modifiers()) {
+int best_match_count = 0;
+d->searchBufferTimer.start(2000, this);
+d->searchBuffer += e->text();
+for(int i = 0; i < d->actions.size(); ++i) {
+int match_count = 0;
+if (d->actionRects.at(i).isNull())
+continue;
+QAction *act = d->actions.at(i);
+const QString act_text = act->text();
+for(int c = 0; c < d->searchBuffer.size(); ++c) {
+if(act_text.indexOf(d->searchBuffer.at(c), 0, Qt::CaseInsensitive) != -1)
+++match_count;
+}
+if(match_count > best_match_count) {
+best_match_count = match_count;
+nextAction = act;
+}
+}
+}
+#ifndef QT_NO_SHORTCUT
+else {
+int clashCount = 0;
+QAction *first = 0, *currentSelected = 0, *firstAfterCurrent = 0;
+QChar c = e->text().at(0).toUpper();
+for(int i = 0; i < d->actions.size(); ++i) {
+if (d->actionRects.at(i).isNull())
+continue;
+QAction *act = d->actions.at(i);
+QKeySequence sequence = QKeySequence::mnemonic(act->text());
+int key = sequence[0] & 0xffff;
+if (key == c.unicode()) {
+clashCount++;
+if (!first)
+first = act;
+if (act == d->currentAction)
+currentSelected = act;
+else if (!firstAfterCurrent && currentSelected)
+firstAfterCurrent = act;
+}
+}
+if (clashCount == 1)
+activateAction = true;
+if (clashCount >= 1) {
+if (clashCount == 1 || !currentSelected || !firstAfterCurrent)
+nextAction = first;
+else
+nextAction = firstAfterCurrent;
+}
+}
+#endif
+if (nextAction) {
+key_consumed = true;
+if(d->scroll)
+d->scrollMenu(nextAction, QMenuPrivate::QMenuScroller::ScrollCenter, false);
+d->setCurrentAction(nextAction, 20, QMenuPrivate::SelectedFromElsewhere, true);
+if (!nextAction->menu() && activateAction) {
+d->setSyncAction();
+d->activateAction(nextAction, QAction::Trigger);
+}
+}
+}
+if (!key_consumed) {
+if (QWidget *caused = d->causedPopup.widget) {
+while(QMenu *m = qobject_cast<QMenu*>(caused))
+caused = m->d_func()->causedPopup.widget;
+#ifndef QT_NO_MENUBAR
+if (QMenuBar *mb = qobject_cast<QMenuBar*>(caused)) {
+QAction *oldAct = mb->d_func()->currentAction;
+QApplication::sendEvent(mb, e);
+if (mb->d_func()->currentAction != oldAct)
+key_consumed = true;
+}
+#endif
+}
+}
+#ifdef Q_OS_WIN32
+if (key_consumed && (e->key() == Qt::Key_Control || e->key() == Qt::Key_Shift || e->key() == Qt::Key_Meta))
+QApplication::beep();
+#endif // Q_OS_WIN32
+}
+if (key_consumed)
+e->accept();
+else
+e->ignore();
+}
+/*!
+\reimp
+*/
+void QMenu::mouseMoveEvent(QMouseEvent *e)
+{
+Q_D(QMenu);
+if (!isVisible() || d->aboutToHide || d->mouseEventTaken(e))
+return;
+d->motions++;
+if (d->motions == 0) // ignore first mouse move event (see enterEvent())
+return;
+d->hasHadMouse = d->hasHadMouse || rect().contains(e->pos());
+QAction *action = d->actionAt(e->pos());
+if (!action) {
+if (d->hasHadMouse)
+d->setCurrentAction(0);
+return;
+} else if(e->buttons()) {
+d->mouseDown = this;
+}
+if (d->sloppyRegion.contains(e->pos())) {
+d->sloppyAction = action;
+QMenuPrivate::sloppyDelayTimer.start(style()->styleHint(QStyle::SH_Menu_SubMenuPopupDelay, 0, this)*6, this);
+} else {
+d->setCurrentAction(action, style()->styleHint(QStyle::SH_Menu_SubMenuPopupDelay, 0, this));
+}
+}
+/*!
+\reimp
+*/
+void QMenu::enterEvent(QEvent *)
+{
+d_func()->motions = -1; // force us to ignore the generate mouse move in mouseMoveEvent()
+}
+/*!
+\reimp
+*/
+void QMenu::leaveEvent(QEvent *)
+{
+Q_D(QMenu);
+d->sloppyAction = 0;
+if (!d->sloppyRegion.isEmpty())
+d->sloppyRegion = QRegion();
+if (!d->activeMenu && d->currentAction)
+setActiveAction(0);
+}
+/*!
+\reimp
+*/
+void
+QMenu::timerEvent(QTimerEvent *e)
+{
+Q_D(QMenu);
+if (d->scroll && d->scroll->scrollTimer.timerId() == e->timerId()) {
+d->scrollMenu((QMenuPrivate::QMenuScroller::ScrollDirection)d->scroll->scrollDirection);
+if (d->scroll->scrollFlags == QMenuPrivate::QMenuScroller::ScrollNone)
+d->scroll->scrollTimer.stop();
+} else if(QMenuPrivate::menuDelayTimer.timerId() == e->timerId()) {
+QMenuPrivate::menuDelayTimer.stop();
+internalDelayedPopup();
+} else if(QMenuPrivate::sloppyDelayTimer.timerId() == e->timerId()) {
+QMenuPrivate::sloppyDelayTimer.stop();
+internalSetSloppyAction();
+} else if(d->searchBufferTimer.timerId() == e->timerId()) {
+d->searchBuffer.clear();
+}
+}
+/*!
+\reimp
+*/
+void QMenu::actionEvent(QActionEvent *e)
+{
+Q_D(QMenu);
+d->itemsDirty = 1;
+setAttribute(Qt::WA_Resized, false);
+if (d->tornPopup)
+d->tornPopup->syncWithMenu(this, e);
+if (e->type() == QEvent::ActionAdded) {
+if(!d->tornoff) {
+connect(e->action(), SIGNAL(triggered()), this, SLOT(_q_actionTriggered()));
+connect(e->action(), SIGNAL(hovered()), this, SLOT(_q_actionHovered()));
+}
+QWidget *widget = 0;
+if (QWidgetAction *wa = qobject_cast<QWidgetAction *>(e->action()))
+widget = wa->requestWidget(this);
+int index = d->actions.indexOf(e->action());
+Q_ASSERT(index != -1);
+d->widgetItems.insert(index, widget);
+} else if (e->type() == QEvent::ActionRemoved) {
+e->action()->disconnect(this);
+if (e->action() == d->currentAction)
+d->currentAction = 0;
+int index = d->actions.indexOf(e->before()) + 1;
+if (QWidgetAction *wa = qobject_cast<QWidgetAction *>(e->action())) {
+if (QWidget *widget = d->widgetItems.at(index))
+wa->releaseWidget(widget);
+}
+Q_ASSERT(index != -1);
+d->widgetItems.removeAt(index);
+}
+#ifdef Q_WS_MAC
+if (d->mac_menu) {
+if (e->type() == QEvent::ActionAdded)
+d->mac_menu->addAction(e->action(), d->mac_menu->findAction(e->before()), d);
+else if (e->type() == QEvent::ActionRemoved)
+d->mac_menu->removeAction(e->action());
+else if (e->type() == QEvent::ActionChanged)
+d->mac_menu->syncAction(e->action());
+}
+#endif
+#if defined(Q_WS_WINCE) && !defined(QT_NO_MENUBAR)
+if (!d->wce_menu)
+d->wce_menu = new QMenuPrivate::QWceMenuPrivate;
+if (e->type() == QEvent::ActionAdded)
+d->wce_menu->addAction(e->action(), d->wce_menu->findAction(e->before()));
+else if (e->type() == QEvent::ActionRemoved)
+d->wce_menu->removeAction(e->action());
+else if (e->type() == QEvent::ActionChanged)
+d->wce_menu->syncAction(e->action());
+#endif
+#ifdef Q_WS_S60
+if (!d->symbian_menu)
+d->symbian_menu = new QMenuPrivate::QSymbianMenuPrivate;
+if (e->type() == QEvent::ActionAdded)
+d->symbian_menu->addAction(e->action(), d->symbian_menu->findAction(e->before()));
+else if (e->type() == QEvent::ActionRemoved)
+d->symbian_menu->removeAction(e->action());
+else if (e->type() == QEvent::ActionChanged)
+d->symbian_menu->syncAction(e->action());
+#endif
+if (isVisible()) {
+d->updateActionRects();
+	resize(sizeHint());
+update();
+}
+}
+/*!
+\internal
+*/
+void QMenu::internalSetSloppyAction()
+{
+if (d_func()->sloppyAction)
+d_func()->setCurrentAction(d_func()->sloppyAction, 0);
+}
+/*!
+\internal
+*/
+void QMenu::internalDelayedPopup()
+{
+Q_D(QMenu);
+//hide the current item
+if (QMenu *menu = d->activeMenu) {
+d->activeMenu = 0;
+d->hideMenu(menu);
+}
+if (!d->currentAction || !d->currentAction->isEnabled() || !d->currentAction->menu() ||
+!d->currentAction->menu()->isEnabled() || d->currentAction->menu()->isVisible())
+return;
+//setup
+d->activeMenu = d->currentAction->menu();
+d->activeMenu->d_func()->causedPopup.widget = this;
+d->activeMenu->d_func()->causedPopup.action = d->currentAction;
+int subMenuOffset = style()->pixelMetric(QStyle::PM_SubMenuOverlap, 0, this);
+const QRect actionRect(d->actionRect(d->currentAction));
+const QSize menuSize(d->activeMenu->sizeHint());
+const QPoint rightPos(mapToGlobal(QPoint(actionRect.right() + subMenuOffset + 1, actionRect.top())));
+const QPoint leftPos(mapToGlobal(QPoint(actionRect.left() - subMenuOffset - menuSize.width(), actionRect.top())));
+QPoint pos(rightPos);
+QMenu *caused = qobject_cast<QMenu*>(d->activeMenu->d_func()->causedPopup.widget);
+const QRect availGeometry(d->popupGeometry(caused));
+if (isRightToLeft()) {
+pos = leftPos;
+if ((caused && caused->x() < x()) || pos.x() < availGeometry.left()) {
+if(rightPos.x() + menuSize.width() < availGeometry.right())
+pos = rightPos;
+else
+pos.rx() = availGeometry.left();
+}
+} else {
+if ((caused && caused->x() > x()) || pos.x() + menuSize.width() > availGeometry.right()) {
+if(leftPos.x() < availGeometry.left())
+pos.rx() = availGeometry.right() - menuSize.width();
+else
+pos = leftPos;
+}
+}
+//calc sloppy focus buffer
+if (style()->styleHint(QStyle::SH_Menu_SloppySubMenus, 0, this)) {
+QPoint cur = QCursor::pos();
+if (actionRect.contains(mapFromGlobal(cur))) {
+QPoint pts[4];
+pts[0] = QPoint(cur.x(), cur.y() - 2);
+pts[3] = QPoint(cur.x(), cur.y() + 2);
+if (pos.x() >= cur.x())        {
+pts[1] = QPoint(geometry().right(), pos.y());
+pts[2] = QPoint(geometry().right(), pos.y() + menuSize.height());
+} else {
+pts[1] = QPoint(pos.x() + menuSize.width(), pos.y());
+pts[2] = QPoint(pos.x() + menuSize.width(), pos.y() + menuSize.height());
+}
+QPolygon points(4);
+for(int i = 0; i < 4; i++)
+points.setPoint(i, mapFromGlobal(pts[i]));
+d->sloppyRegion = QRegion(points);
+}
+}
+//do the popup
+d->activeMenu->popup(pos);
+}
+/*!
+\fn void QMenu::addAction(QAction *action)
+\overload
+Appends the action \a action to the menu's list of actions.
+\sa QMenuBar::addAction(), QWidget::addAction()
+*/
+/*!
+\fn void QMenu::aboutToHide()
+\since 4.2
+This signal is emitted just before the menu is hidden from the user.
+\sa aboutToShow(), hide()
+*/
+/*!
+\fn void QMenu::aboutToShow()
+This signal is emitted just before the menu is shown to the user.
+\sa aboutToHide(), show()
+*/
+/*!
+\fn void QMenu::triggered(QAction *action)
+This signal is emitted when an action in this menu is triggered.
+\a action is the action that caused the signal to be emitted.
+Normally, you connect each menu action's \l{QAction::}{triggered()} signal
+to its own custom slot, but sometimes you will want to connect several
+actions to a single slot, for example, when you have a group of closely
+related actions, such as "left justify", "center", "right justify".
+\note This signal is emitted for the main parent menu in a hierarchy.
+Hence, only the parent menu needs to be connected to a slot; sub-menus need
+not be connected.
+\sa hovered(), QAction::triggered()
+*/
+/*!
+\fn void QMenu::hovered(QAction *action)
+This signal is emitted when a menu action is highlighted; \a action
+is the action that caused the signal to be emitted.
+Often this is used to update status information.
+\sa triggered(), QAction::hovered()
+*/
+/*!\internal
+*/
+void QMenu::setNoReplayFor(QWidget *noReplayFor)
+{
+#ifdef Q_WS_WIN
+d_func()->noReplayFor = noReplayFor;
+#else
+Q_UNUSED(noReplayFor);
+#endif
+}
+/*!
+\property QMenu::separatorsCollapsible
+\since 4.2
+\brief whether consecutive separators should be collapsed
+This property specifies whether consecutive separators in the menu
+should be visually collapsed to a single one. Separators at the
+beginning or the end of the menu are also hidden.
+By default, this property is true.
+*/
+bool QMenu::separatorsCollapsible() const
+{
+Q_D(const QMenu);
+return d->collapsibleSeparators;
+}
+void QMenu::setSeparatorsCollapsible(bool collapse)
+{
+Q_D(QMenu);
+if (d->collapsibleSeparators == collapse)
+return;
+d->collapsibleSeparators = collapse;
+d->itemsDirty = 1;
+if (isVisible()) {
+d->updateActionRects();
+update();
+}
+#ifdef Q_WS_MAC
+if (d->mac_menu)
+d->syncSeparatorsCollapsible(collapse);
+#endif
+}
+#ifdef QT3_SUPPORT
+int QMenu::insertAny(const QIcon *icon, const QString *text, const QObject *receiver, const char *member,
+const QKeySequence *shortcut, const QMenu *popup, int id, int index)
+{
+QAction *act = popup ? popup->menuAction() : new QAction(this);
+if (id != -1)
+static_cast<QMenuItem*>(act)->setId(id);
+if (icon)
+act->setIcon(*icon);
+if (text)
+act->setText(*text);
+if (shortcut)
+act->setShortcut(*shortcut);
+if (receiver && member)
+QObject::connect(act, SIGNAL(activated(int)), receiver, member);
+if (index == -1 || index >= actions().count())
+addAction(act);
+else
+insertAction(actions().value(index), act);
+return findIdForAction(act);
+}
+/*!
+Use insertAction() or one of the addAction() overloads instead.
+*/
+int QMenu::insertItem(QMenuItem *item, int id, int index)
+{
+if (index == -1 || index >= actions().count())
+addAction(item);
+else
+insertAction(actions().value(index), item);
+if (id > -1)
+item->d_func()->id = id;
+return findIdForAction(item);
+}
+/*!
+Use the insertSeparator() overload that takes a QAction *
+parameter instead.
+*/
+int QMenu::insertSeparator(int index)
+{
+QAction *act = new QAction(this);
+act->setSeparator(true);
+if (index == -1 || index >= actions().count())
+addAction(act);
+else
+insertAction(actions().value(index), act);
+return findIdForAction(act);
+}
+QAction *QMenu::findActionForId(int id) const
+{
+Q_D(const QMenu);
+for (int i = 0; i < d->actions.size(); ++i) {
+QAction *act = d->actions.at(i);
+if (findIdForAction(act)== id)
+return act;
+}
+return 0;
+}
+/*!
+Use QAction and actions() instead.
+*/
+QMenuItem *QMenu::findPopup( QMenu *popup, int *index )
+{
+QList<QAction *> list = actions();
+for (int i = 0; i < list.size(); ++i) {
+QAction *act = list.at(i);
+if (act->menu() == popup) {
+QMenuItem *item = static_cast<QMenuItem *>(act);
+if (index)
+*index = act->d_func()->id;
+return item;
+}
+}
+return 0;
+}
+/*!
+Use QAction::setData() instead.
+*/
+bool QMenu::setItemParameter(int id, int param)
+{
+if (QAction *act = findActionForId(id)) {
+act->d_func()->param = param;
+return true;
+}
+return false;
+}
+/*!
+Use QAction::data() instead.
+*/
+int QMenu::itemParameter(int id) const
+{
+if (QAction *act = findActionForId(id))
+return act->d_func()->param;
+return id;
+}
+/*!
+Use actions instead.
+*/
+void QMenu::setId(int index, int id)
+{
+if(QAction *act = actions().value(index))
+act->d_func()->id = id;
+}
+/*!
+Use style()->pixelMetric(QStyle::PM_MenuPanelWidth, this) instead.
+*/
+int QMenu::frameWidth() const
+{
+return style()->pixelMetric(QStyle::PM_MenuPanelWidth, 0, this);
+}
+int QMenu::findIdForAction(QAction *act) const
+{
+if (!act)
+return -1;
+return act->d_func()->id;
+}
+#endif // QT3_SUPPORT
+/*!
+\fn uint QMenu::count() const
+Use actions().count() instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QString &text, const QObject *receiver, const char* member, const QKeySequence& shortcut, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QIcon& icon, const QString &text, const QObject *receiver, const char* member, const QKeySequence& shortcut, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QPixmap &pixmap, const QObject *receiver, const char* member, const QKeySequence& shortcut, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QString &text, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QIcon& icon, const QString &text, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QString &text, QMenu *popup, int id, int index)
+Use insertMenu() or one of the addMenu() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QIcon& icon, const QString &text, QMenu *popup, int id, int index)
+Use insertMenu() or one of the addMenu() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QPixmap &pixmap, int id, int index)
+Use insertAction() or one of the addAction() overloads instead.
+*/
+/*!
+\fn int QMenu::insertItem(const QPixmap &pixmap, QMenu *popup, int id, int index)
+Use insertMenu() or one of the addMenu() overloads instead.
+*/
+/*!
+\fn void QMenu::removeItem(int id)
+Use removeAction() instead.
+*/
+/*!
+\fn void QMenu::removeItemAt(int index)
+Use removeAction() instead.
+*/
+/*!
+\fn QKeySequence QMenu::accel(int id) const
+Use shortcut() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setAccel(const QKeySequence& key, int id)
+Use setShortcut() on the relevant QAction instead.
+*/
+/*!
+\fn QIcon QMenu::iconSet(int id) const
+Use icon() on the relevant QAction instead.
+*/
+/*!
+\fn QString QMenu::text(int id) const
+Use text() on the relevant QAction instead.
+*/
+/*!
+\fn QPixmap QMenu::pixmap(int id) const
+Use QPixmap(icon()) on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setWhatsThis(int id, const QString &w)
+Use setWhatsThis() on the relevant QAction instead.
+*/
+/*!
+\fn QString QMenu::whatsThis(int id) const
+Use whatsThis() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::changeItem(int id, const QString &text)
+Use setText() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::changeItem(int id, const QPixmap &pixmap)
+Use setText() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::changeItem(int id, const QIcon &icon, const QString &text)
+Use setIcon() and setText() on the relevant QAction instead.
+*/
+/*!
+\fn bool QMenu::isItemActive(int id) const
+Use activeAction() instead.
+*/
+/*!
+\fn bool QMenu::isItemEnabled(int id) const
+Use isEnabled() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setItemEnabled(int id, bool enable)
+Use setEnabled() on the relevant QAction instead.
+*/
+/*!
+\fn bool QMenu::isItemChecked(int id) const
+Use isChecked() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setItemChecked(int id, bool check)
+Use setChecked() on the relevant QAction instead.
+*/
+/*!
+\fn bool QMenu::isItemVisible(int id) const
+Use isVisible() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setItemVisible(int id, bool visible)
+Use setVisible() on the relevant QAction instead.
+*/
+/*!
+\fn QRect QMenu::itemGeometry(int index)
+Use actionGeometry() on the relevant QAction instead.
+*/
+/*!
+\fn QFont QMenu::itemFont(int id) const
+Use font() on the relevant QAction instead.
+*/
+/*!
+\fn void QMenu::setItemFont(int id, const QFont &font)
+Use setFont() on the relevant QAction instead.
+*/
+/*!
+\fn int QMenu::indexOf(int id) const
+Use actions().indexOf(action) on the relevant QAction instead.
+*/
+/*!
+\fn int QMenu::idAt(int index) const
+Use actions instead.
+*/
+/*!
+\fn void QMenu::activateItemAt(int index)
+Use activate() on the relevant QAction instead.
+*/
+/*!
+\fn bool QMenu::connectItem(int id, const QObject *receiver, const char* member)
+Use connect() on the relevant QAction instead.
+*/
+/*!
+\fn bool QMenu::disconnectItem(int id,const QObject *receiver, const char* member)
+Use disconnect() on the relevant QAction instead.
+*/
+/*!
+\fn QMenuItem *QMenu::findItem(int id) const
+Use actions instead.
+*/
+/*!
+\fn void QMenu::popup(const QPoint & pos, int indexAtPoint)
+Use popup() on the relevant QAction instead.
+*/
+/*!
+\fn int QMenu::insertTearOffHandle(int a, int b)
+Use setTearOffEnabled() instead.
+*/
+/*!
+\fn int QMenu::itemAtPos(const QPoint &p, bool ignoreSeparator)
+Use actions instead.
+*/
+/*!
+\fn int QMenu::columns() const
+Use columnCount() instead.
+*/
+/*!
+\fn int QMenu::itemHeight(int index)
+Use actionGeometry(actions().value(index)).height() instead.
+*/
+/*!
+\fn int QMenu::itemHeight(QMenuItem *mi)
+Use actionGeometry() instead.
+*/
+/*!
+\fn void QMenu::activated(int itemId);
+Use triggered() instead.
+*/
+/*!
+\fn void QMenu::highlighted(int itemId);
+Use hovered() instead.
+*/
+/*!
+\fn void QMenu::setCheckable(bool checkable)
+Not necessary anymore. The \a checkable parameter is ignored.
+*/
+/*!
+\fn bool QMenu::isCheckable() const
+Not necessary anymore. Always returns true.
+*/
+/*!
+\fn void QMenu::setActiveItem(int id)
+Use setActiveAction() instead.
+*/
+QT_END_NAMESPACE
+// for private slots
+#include "moc_qmenu.cpp"
+#include "qmenu.moc"
+#endif // QT_NO_MENU

changeset 0	1918ee327afb
child 3	41300fa6a67c