自学教程：C++ topLevelWidget函数代码示例

/*!  /internal  /fn void PhoneLauncherView::selectionChangedHandler(GridItem *item)  Called in response to the current item changing (i.e. SelectedItem has shifted position,  highlight a different GridItem object). Updates the window title, and emits the  signal highlighted(...).  Signals emitted: /l{function}{highlighted(QContent)}.*/void PhoneLauncherView::selectionChangedHandler(GridItem *item){    if ( !item ) {        qWarning("PhoneLauncherView::selectionChangedHandler(...): Error - item parameter is null.");        // Set the title to a space rather than an empty string. This causes the title bar to        // remain the same, but just without a title. An empty string will cause a different kind of        // title bar to appear.        if (!Qtopia::mousePreferred())            topLevelWidget()->setWindowTitle(" ");        return;    }    if ( !(item->content()) ) {        // Set the title to a space rather than an empty string. This causes the title bar to        // remain the same, but just without a title. An empty string will cause a different kind of        // title bar to appear.        if (!Qtopia::mousePreferred())            topLevelWidget()->setWindowTitle(" ");        return;    }    emit highlighted(*(item->content()));    if (!Qtopia::mousePreferred())        topLevelWidget()->setWindowTitle(item->content()->name());}

void BasicTab::slotCapturedShortcut(const TDEShortcut& cut){    if (signalsBlocked())       return;    if( KKeyChooser::checkGlobalShortcutsConflict( cut, true, topLevelWidget())        || KKeyChooser::checkStandardShortcutsConflict( cut, true, topLevelWidget()))        return;    if ( KHotKeys::present() )    {       if (!_menuEntryInfo->isShortcutAvailable( cut ) )       {          KService::Ptr service;          emit findServiceShortcut(cut, service);          if (!service)             service = KHotKeys::findMenuEntry(cut.toString());          if (service)          {             KMessageBox::sorry(this, i18n("<qt>The key <b>%1</b> can not be used here because it is already used to activate <b>%2</b>.").arg(cut.toString(), service->name()));             return;          }          else          {             KMessageBox::sorry(this, i18n("<qt>The key <b>%1</b> can not be used here because it is already in use.").arg(cut.toString()));             return;          }       }       _menuEntryInfo->setShortcut( cut );    }    _keyEdit->setShortcut(cut, false);    if (_menuEntryInfo)       emit changed( _menuEntryInfo );}

Popup::Popup(QWidget* text, QButton* button, QWidget* parent, const char* name)    : QWidget(parent, name){    _text = text;    _button = button;    _popup = NULL;    text->reparent(this, 0, QPoint());    if (text->inherits("LineEdit"))	connect(text, SIGNAL(validData()), SIGNAL(validData()));    button->reparent(this, 0, QPoint());    connect(button, SIGNAL(clicked()), SLOT(openPopup()));    if (topLevelWidget())	topLevelWidget()->installEventFilter(this);    text->installEventFilter(this);    setFocusProxy(text);    setFocusPolicy(StrongFocus);    QGridLayout* grid = new QGridLayout(this);    grid->setColStretch(0, 1);    grid->addWidget(text, 0, 0);    grid->addWidget(button, 0, 1, AlignLeft | AlignVCenter);    setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed));}

void UserWnd::setMessage(Message **msg){    bool bSetFocus = false;    Container *container = NULL;    if (topLevelWidget() && topLevelWidget()->inherits("Container")){        container = static_cast<Container*>(topLevelWidget());        if (container->wnd() == this)            bSetFocus = true;    }    if (!m_edit->setMessage(*msg, bSetFocus)){        delete *msg;        *msg = new Message(MessageGeneric);        m_edit->setMessage(*msg, bSetFocus);    }    if (container){        container->setMessageType((*msg)->baseType());        container->contactChanged(getContacts()->contact(m_id));    }    if ((m_view == NULL) || ((*msg)->id() == 0))        return;    if (m_view->findMessage(*msg))        return;    m_view->addMessage(*msg);    if (!m_view->hasSelectedText())        m_view->scrollToBottom();}

void FontEdit::chooseFont(){#ifdef USE_KDE    QFont _f = f;    if (KFontDialog::getFont(_f, false, topLevelWidget()) == KFontDialog::Accepted)        setWinFont(_f);#else    bool ok = false;    QFont _f = QFontDialog::getFont(&ok, f, topLevelWidget());    if (ok) setWinFont(_f);#endif}

void TB_TeamBody::advancedClicked(int index, bool separateWindow){    if(!dockAdvanced())    {        createDockAdvanced(separateWindow);        dockAdvanced()->setCurrentPokemon(index);    } else {        int width = m_dockAdvanced->width();        m_dockAdvanced->close();        if (!advSepWindow)            topLevelWidget()->resize(topLevelWidget()->width()- width, topLevelWidget()->height());    }}

/*!  /internal  /fn void PhoneLauncherView::focusInEvent(QFocusEvent *event)  Ensures that when the PhoneLauncherView is focused after an activity such as launching an  application, the current icon will animate.*/void PhoneLauncherView::focusInEvent(QFocusEvent *event){    QGraphicsView::focusInEvent(event);    if ( selectedItem && event->reason() != Qt::PopupFocusReason && !Qtopia::mousePreferred()) {        selectedItem->startAnimating();    }    if (Qtopia::mousePreferred())        topLevelWidget()->setWindowTitle(tr("Main Menu"));    else if (currentItem())        topLevelWidget()->setWindowTitle(currentGridItem()->content()->name());}

bool SidebarExtension::eventFilter( TQObject *, TQEvent *e ) {	if (e->type()==TQEvent::MouseButtonPress) {		m_resizing=true;		m_x=((TQMouseEvent*)e)->globalX();		return true;	} else if (e->type()==TQEvent::MouseButtonRelease) {		m_resizing=false;		m_expandedSize=topLevelWidget()->width();		needLayoutUpdate(true);		return true;	} else if (e->type()==TQEvent::MouseMove) {		if (m_resizing) {			Position p=position();			if (p==Left) {				int diff=((TQMouseEvent*)e)->globalX()-m_x;					if (abs(diff)>3) {						topLevelWidget()->setFixedWidth(topLevelWidget()->width()+diff);						m_x=((TQMouseEvent*)e)->globalX();					}			} else if (p==Right) {				int diff=((TQMouseEvent*)e)->globalX()-m_x;					if (abs(diff)>3) {						topLevelWidget()->setFixedWidth(topLevelWidget()->width()-diff);						topLevelWidget()->move(topLevelWidget()->x()+diff,topLevelWidget()->y());						m_x=((TQMouseEvent*)e)->globalX();					}			}			return true;		}	}	return false;}

void QWidget::setActiveWindow(){    QWidget *tlw = topLevelWidget();    if ( tlw->isVisible() ) {	qwsDisplay()->requestFocus( tlw->winId(), TRUE);    }}

void QWidget::showWindow(){    if ( testWFlags(WType_TopLevel) ) {	updateRequestedRegion( mapToGlobal(QPoint(0,0)) );	QRegion r( req_region );#ifndef QT_NO_QWS_MANAGER	if ( extra && extra->topextra && extra->topextra->qwsManager ) {	    QRegion wmr = extra->topextra->qwsManager->region();	    wmr = qt_screen->mapToDevice( wmr, QSize(qt_screen->width(), qt_screen->height()) );	    r += wmr;	}#endif	qwsDisplay()->requestRegion(winId(), r);	if ( !testWFlags(WStyle_Tool) ) {	    qwsDisplay()->requestFocus(winId(),TRUE);	}	qwsDisplay()->setAltitude( winId(),		testWFlags(WStyle_StaysOnTop) ? 1 : 0, TRUE );    } else if ( !topLevelWidget()->in_show ) {	updateRequestedRegion( mapToGlobal(QPoint(0,0)) );	QWidget *p = parentWidget();	p->setChildrenAllocatedDirty( geometry(), this );	p->paintable_region_dirty = TRUE;	p->overlapping_children = -1;	paint_heirarchy( this, TRUE );    }}

bool DockContainer::dockModule(ConfigModule *module){    if(module == _module)        return true;    if(_module && _module->isChanged())    {        int res = KMessageBox::warningYesNoCancel(this, module ? i18n("There are unsaved changes in the active module./n"                                                                      "Do you want to apply the changes before running "                                                                      "the new module or discard the changes?")                                                               : i18n("There are unsaved changes in the active module./n"                                                                      "Do you want to apply the changes before exiting "                                                                      "the Control Center or discard the changes?"),                                                  i18n("Unsaved Changes"), KStdGuiItem::apply(), KStdGuiItem::discard());        if(res == KMessageBox::Yes)            _module->module()->applyClicked();        if(res == KMessageBox::Cancel)            return false;    }    raiseWidget(_busyw);    kapp->processEvents();    deleteModule();    if(!module)        return true;    ProxyWidget *widget = loadModule(module);    KCGlobal::repairAccels(topLevelWidget());    return (widget != 0);}

/*!    Constructs a resize corner called /a name, as a child widget of /a    parent.*/QSizeGrip::QSizeGrip( QWidget * parent, const char* name )    : QWidget( parent, name ){#ifndef QT_NO_CURSOR#ifndef Q_WS_MAC    if ( QApplication::reverseLayout() )	setCursor( sizeBDiagCursor );    else	setCursor( sizeFDiagCursor );#endif#endif    setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed ) );#if defined(Q_WS_X11)    if ( !qt_sizegrip_workspace( this ) ) {	WId id = winId();	XChangeProperty(qt_xdisplay(), topLevelWidget()->winId(),			qt_sizegrip, XA_WINDOW, 32, PropModeReplace,			(unsigned char *)&id, 1);    }#endif    tlw = qt_sizegrip_topLevelWidget( this );    if ( tlw )	tlw->installEventFilter( this );    installEventFilter( this ); //for binary compatibility fix in 4.0 with an event() ###}

//-----------------------------------------------------------------------------int ctkMenuButtonTest1(int argc, char * argv [] ){  QApplication app(argc, argv);  QWidget topLevelWidget(0);  QMenu* menu = new QMenu("menu");  menu->addAction("extra choice 1");  menu->addAction("extra choice 2");  menu->addAction("extra choice 3");  QPushButton button1("QPushButton with no menu");  QPushButton button2("QPushButton with menu");  button2.setMenu(menu);    ctkMenuButton button3("ctkMenuButton with no menu");  ctkMenuButton button4("ctkMenuButton with menu");    button4.setMenu(menu);    QVBoxLayout* layout = new QVBoxLayout;  layout->addWidget(&button1);  layout->addWidget(&button2);  layout->addWidget(&button3);  layout->addWidget(&button4);    topLevelWidget.setLayout(layout);  topLevelWidget.show();  topLevelWidget.resize(200, 100);  if (argc < 2 || QString(argv[1]) != "-I" )    {    QTimer::singleShot(200, &app, SLOT(quit()));    }  return app.exec();}

//--------------------------------------------------------------------------------void QmvQueryWidget::advancedQuery(){    static QmvQueryWidget * aq;    if ( !dialog_advqry )    {        aq = new QmvQueryWidget( this, this, "advanced query" );        dialog_advqry = aq->getAdvancedDialog();        dialog_advqry->move( mapToGlobal( QPoint( topLevelWidget()->width() - 400, 0) ) );    }        // update adv from simple    aq->getCondition(0)->update();        // activate all conditions    for ( int row = 0; row < query_object->countConditions(); row++ )        query_object->getCondition( row )->setActive(TRUE);        // Run the advanced query    dialog_advqry->exec();            // update simple from adv    getCondition(0)->update();        // deactivate all other than first condition    for ( int row = 1; row < query_object->countConditions(); row++ )        query_object->getCondition( row )->setActive(FALSE);    }

QvisScatterPlotWizard::QvisScatterPlotWizard(AttributeSubject *s,                                             QWidget *parent,                                             const std::string &var_name): QvisWizard(s, parent){    setOption(QWizard::NoCancelButton, false);    setOption(QWizard::HaveHelpButton, false);    setOption(QWizard::HaveNextButtonOnLastPage, false);    setOption(QWizard::NoBackButtonOnLastPage, true);    // Set some defaults into the wizard's local copy of the plot attributes.    scatterAtts->SetVar1Role(ScatterAttributes::Coordinate0);    scatterAtts->SetVar2("default");    scatterAtts->SetVar2Role(ScatterAttributes::Coordinate1);    scatterAtts->SetVar3("default");    scatterAtts->SetVar3Role(ScatterAttributes::Coordinate2);    scatterAtts->SetVar4("default");    scatterAtts->SetVar4Role(ScatterAttributes::Color);    // Set the wizard's title.    topLevelWidget()->setWindowTitle(tr("Scatter Plot Setup"));    //    // Create the main wizard page.    //    mainPage = new QvisScatterPlotWizardPage(s,this,var_name);    addPage(mainPage);    mainPage->setFinalPage(true);}

void GeneralSettings::slotOpenAccountWizard(){    if (QSystemTrayIcon::isSystemTrayAvailable()) {        topLevelWidget()->close();    }    OwncloudSetupWizard::runWizard(qApp, SLOT(slotownCloudWizardDone(int)), 0);}

void OverlayWidget::reposition(){    if ( !mAlignWidget )        return;    // p is in the alignWidget's coordinates    QPoint p;    // We are always above the alignWidget, right-aligned with it.    p.setX(mAlignWidget->width() - width());    p.setY(-height());    // Position in the toplevelwidget's coordinates    QPoint pTopLevel = mAlignWidget->mapTo(topLevelWidget(), p);    // Position in the widget's parentWidget coordinates    QPoint pParent   = parentWidget()->mapFrom(topLevelWidget(), pTopLevel);    // Move 'this' to that position.    move(pParent);}