C++ QMenuItem类代码示例

//static
bool KexiContextMenuUtils::updateTitle(QPopupMenu *menu, const QString& objectName, 
	const QString& objectTypeName, const QString& iconName)
{
	if (!menu || objectName.isEmpty() || objectTypeName.isEmpty())
		return false;
	const int id = menu->idAt(0);
	QMenuItem *item = menu->findItem(id);
	if (!item)
		return false;
	KPopupTitle *title = dynamic_cast<KPopupTitle *>(item->widget());
	if (!title)
		return false;

/*! @todo look at makeFirstCharacterUpperCaseInCaptions setting [bool]
 (see doc/dev/settings.txt) */
	QString realTitle( i18n("Object name : Object type", "%1 : %2")
		.arg( objectName[0].upper() + objectName.mid(1) )
		.arg( objectTypeName ));

	if (iconName.isEmpty())
		title->setTitle(realTitle);
	else {
		QPixmap pixmap(SmallIcon( iconName ));
		title->setTitle(realTitle, &pixmap);
	}
	return true;
}

/*!
  Sets a Whats This help for a certain menu item.

  \arg \e id is the menu item id.
  \arg \e text is the Whats This help text in rich text format ( see QStyleSheet)

  \sa whatsThis()
 */
void QMenuData::setWhatsThis( int id, const QString& text )
{

    QMenuData *parent;
    QMenuItem *mi = findItem( id, &parent );
    if ( mi ) {
	mi->setWhatsThis( text );
	parent->menuContentsChanged();
    }
}

void KPopupMenu::changeTitle(int id, const QPixmap &icon, const QString &text)
{
    QMenuItem *item = findItem(id);
    if(item){
        if(item->widget())
            ((KPopupTitle *)item->widget())->setTitle(text, &icon);
        else
            qWarning("KPopupMenu: changeTitle() called with non-title id %d.", id);
    }
    else
        qWarning("KPopupMenu: changeTitle() called with invalid id %d.", id);
}

void QMenuData::setItemEnabled( int id, bool enable )
{
    QMenuData *parent;
    QMenuItem *mi = findItem( id, &parent );
    if ( mi && (bool)mi->is_enabled != enable ) {
	mi->is_enabled = enable;
#ifndef QT_NO_ACCEL
	if ( mi->popup() )
	    mi->popup()->enableAccel( enable );
#endif
	parent->menuStateChanged();
    }
}

static inline QPopupMenu *checkInsertIndex(QPopupMenu *popup, const QStringList& tags, const QString &submenu)
{
  int pos = tags.findIndex(submenu);

  QPopupMenu *pi = 0;
  if (pos != -1)
  {
    QMenuItem *p = popup->findItem(pos);
    pi = p?p->popup():0;
  }
  if (!pi) pi = popup;

  return pi;
}

QString KPopupMenu::title(int id) const
{
    if(id == -1) // obsolete
        return(d->m_lastTitle);
    QMenuItem *item = findItem(id);
    if(item){
        if(item->widget())
            return(((KPopupTitle *)item->widget())->title());
        else
            qWarning("KPopupMenu: title() called with non-title id %d.", id);
    }
    else
        qWarning("KPopupMenu: title() called with invalid id %d.", id);
    return(QString::null);
}

QPopupMenu* reduceMenu(QPopupMenu *menu)
{
    if (menu->count() != 1)
    {
       return menu;
    }

    QMenuItem *item = menu->findItem(menu->idAt(0));

    if (item->popup())
    {
       return reduceMenu(item->popup());
    }

    return menu;
}

/*!
  Returns the Whats This help text for the specified item \e id or
  QString::null if no text has been defined yet.

  \sa setWhatsThis()
 */
QString QMenuData::whatsThis( int id ) const
{

    QMenuItem *mi = findItem( id );
    return mi? mi->whatsThis() : QString::null;
}

//.........这里部分代码省略.........
    KAction *quit = KStdAction::quit( this, SLOT(slotQuit()), coll, "quit");

    // remove QString::null parameter -- ellis
    coll->readShortcutSettings( QString::null );
    m_accel = coll->accel();

    // menubar
    KMenuBar *mBar = menuBar();
    QPopupMenu *fileMenu = new QPopupMenu( mBar, "file" );
    open->plug( fileMenu );
    showInOther->plug( fileMenu );
    showInSame->plug( fileMenu );
    showFullscreen->plug( fileMenu );
    fileMenu->insertSeparator();
    slide->plug( fileMenu );
    print->plug( fileMenu );
    fileMenu->insertSeparator();
    quit->plug( fileMenu );

    QPopupMenu *editMenu = new QPopupMenu( mBar, "edit" );
    coll->action("mkdir")->plug( editMenu );
    coll->action("delete")->plug( editMenu );
    editMenu->insertSeparator();
    coll->action("properties")->plug( editMenu );


    // remove the Sorting submenu (and the separator below)
    // from the main contextmenu
    KActionMenu *sortingMenu = static_cast<KActionMenu*>( coll->action("sorting menu"));
    KActionMenu *mainActionMenu = static_cast<KActionMenu*>( coll->action("popupMenu"));
    QPopupMenu *mainPopup = mainActionMenu->popupMenu();
    int sortingIndex = mainPopup->indexOf( sortingMenu->itemId( 0 ) );
    int separatorId = mainPopup->idAt( sortingIndex + 1 );
    QMenuItem *separatorItem = mainPopup->findItem( separatorId );
    if ( separatorItem && separatorItem->isSeparator() )
        mainPopup->removeItem( separatorId );
    mainActionMenu->remove( sortingMenu );

    // add the sorting menu and a separator into the View menu
    KActionMenu *viewActionMenu = static_cast<KActionMenu*>( coll->action("view menu"));
    viewActionMenu->popupMenu()->insertSeparator( 0 );
    sortingMenu->plug( viewActionMenu->popupMenu(), 0 ); // on top of the menu


    QPopupMenu *settingsMenu = new QPopupMenu( mBar, "settings" );
    configure->plug( settingsMenu );

    mBar->insertItem( i18n("&File"), fileMenu );
    mBar->insertItem( i18n("&Edit"), editMenu );
    viewActionMenu->plug( mBar );
    mBar->insertItem( i18n("&Settings"), settingsMenu );

    // toolbar
    KToolBar *tBar = toolBar();
    tBar->setText( i18n( "Main Toolbar" ) );

    coll->action("up")->plug( tBar );
    coll->action("back")->plug( tBar );
    coll->action("forward")->plug( tBar );
    coll->action("home")->plug( tBar );
    coll->action("reload")->plug( tBar );

    tBar->insertSeparator();

    coll->action( "short view" )->plug( tBar );
    coll->action( "detailed view" )->plug( tBar );

void PMShell::slotSelectedLayout( int id )
{
   QMenuItem* menu = m_pViewLayoutsAction->popupMenu( )->findItem( id );
   PMViewLayoutManager::theManager( )->displayLayout( menu->text( ), this );
}

/*! \reimp */
void QCompactStyle::drawControl( ControlElement element, QPainter *p, const QWidget *widget, const QRect &r,
		  const QColorGroup &g, SFlags flags, const QStyleOption& opt )
{
    switch ( element ) {
    case CE_PopupMenuItem:
	{
	    if (! widget || opt.isDefault())
		break;

	    const QPopupMenu *popupmenu = (const QPopupMenu *) widget;
	    QMenuItem *mi = opt.menuItem();
	    if ( !mi )
		break;

	    int tab = opt.tabWidth();
	    int maxpmw = opt.maxIconWidth();
	    bool dis = !(flags & Style_Enabled);
	    bool checkable = popupmenu->isCheckable();
	    bool act = flags & Style_Active;
	    int x, y, w, h;
	    r.rect( &x, &y, &w, &h );

	    QColorGroup itemg = g;

	    if ( checkable )
		maxpmw = QMAX( maxpmw, 8 ); // space for the checkmarks

	    int checkcol	  =     maxpmw;

	    if ( mi && mi->isSeparator() ) {			// draw separator
		p->setPen( g.dark() );
		p->drawLine( x, y, x+w, y );
		p->setPen( g.light() );
		p->drawLine( x, y+1, x+w, y+1 );
		return;
	    }

	    QBrush fill = act? g.brush( QColorGroup::Highlight ) :
				    g.brush( QColorGroup::Button );
	    p->fillRect( x, y, w, h, fill);

	    if ( !mi )
		return;

	    if ( mi->isChecked() ) {
		if ( act && !dis ) {
		    qDrawShadePanel( p, x, y, checkcol, h,
				     g, TRUE, 1, &g.brush( QColorGroup::Button ) );
		} else {
		    qDrawShadePanel( p, x, y, checkcol, h,
				     g, TRUE, 1, &g.brush( QColorGroup::Midlight ) );
		}
	    } else if ( !act ) {
		p->fillRect(x, y, checkcol , h,
			    g.brush( QColorGroup::Button ));
	    }

	    if ( mi->iconSet() ) {		// draw iconset
		QIconSet::Mode mode = dis ? QIconSet::Disabled : QIconSet::Normal;
		if (act && !dis )
		    mode = QIconSet::Active;
		QPixmap pixmap;
		if ( checkable && mi->isChecked() )
		    pixmap = mi->iconSet()->pixmap( QIconSet::Small, mode, QIconSet::On );
		else
		    pixmap = mi->iconSet()->pixmap( QIconSet::Small, mode );
		int pixw = pixmap.width();
		int pixh = pixmap.height();
		if ( act && !dis ) {
		    if ( !mi->isChecked() )
			qDrawShadePanel( p, x, y, checkcol, h, g, FALSE,  1, &g.brush( QColorGroup::Button ) );
		}
		QRect cr( x, y, checkcol, h );
		QRect pmr( 0, 0, pixw, pixh );
		pmr.moveCenter( cr.center() );
		p->setPen( itemg.text() );
		p->drawPixmap( pmr.topLeft(), pixmap );

		QBrush fill = act? g.brush( QColorGroup::Highlight ) :
				      g.brush( QColorGroup::Button );
		p->fillRect( x+checkcol + 1, y, w - checkcol - 1, h, fill);
	    } else  if ( checkable ) {	// just "checking"...
		int mw = checkcol + motifItemFrame;
		int mh = h - 2*motifItemFrame;
		if ( mi->isChecked() ) {

		    SFlags cflags = Style_Default;
		    if (! dis)
			cflags |= Style_Enabled;
		    if (act)
			cflags |= Style_On;

		    drawPrimitive( PE_CheckMark, p, QRect(x + motifItemFrame + 2, y + motifItemFrame,
				    mw, mh), itemg, cflags, opt );
		}
	    }

	    p->setPen( act ? g.highlightedText() : g.buttonText() );

//.........这里部分代码省略.........

void KMenuBar::drawContents(QPainter *p)
{
    // Closes the BR77113
    // We need to overload this method to paint only the menu items
    // This way when the KMenuBar is embedded in the menu applet it
    // integrates correctly.
    //
    // Background mode and origin are set so late because of styles
    // using the polish() method to modify these settings.
    //
    // Of course this hack can safely be removed when real transparency
    // will be available

    if(!d->topLevel)
    {
        QMenuBar::drawContents(p);
    }
    else
    {
        bool up_enabled = isUpdatesEnabled();
        BackgroundMode bg_mode = backgroundMode();
        BackgroundOrigin bg_origin = backgroundOrigin();

        setUpdatesEnabled(false);
        setBackgroundMode(X11ParentRelative);
        setBackgroundOrigin(WindowOrigin);

        p->eraseRect(rect());
        erase();

        QColorGroup g = colorGroup();
        bool e;

        for(int i = 0; i < (int)count(); i++)
        {
            QMenuItem *mi = findItem(idAt(i));

            if(!mi->text().isNull() || mi->pixmap())
            {
                QRect r = itemRect(i);
                if(r.isEmpty() || !mi->isVisible())
                    continue;

                e = mi->isEnabledAndVisible();
                if(e)
                    g = isEnabled() ? (isActiveWindow() ? palette().active() : palette().inactive()) : palette().disabled();
                else
                    g = palette().disabled();

                bool item_active = (actItem == i);

                p->setClipRect(r);

                if(item_active)
                {
                    QStyle::SFlags flags = QStyle::Style_Default;
                    if(isEnabled() && e)
                        flags |= QStyle::Style_Enabled;
                    if(item_active)
                        flags |= QStyle::Style_Active;
                    if(item_active && actItemDown)
                        flags |= QStyle::Style_Down;
                    flags |= QStyle::Style_HasFocus;

                    style().drawControl(QStyle::CE_MenuBarItem, p, this, r, g, flags, QStyleOption(mi));
                }
                else
                {
                    style().drawItem(p, r, AlignCenter | AlignVCenter | ShowPrefix, g, e, mi->pixmap(), mi->text());
                }
            }
        }

        setBackgroundOrigin(bg_origin);
        setBackgroundMode(bg_mode);
        setUpdatesEnabled(up_enabled);
    }
}