C++ setCurrentIndex函数代码示例

void TabWidget::slotNextTab()
{
    setCurrentIndex((currentIndex()+1) % count());
}

//! [1]
void ColorListEditor::setColor(QColor color)
{
    setCurrentIndex(findData(color, int(Qt::DecorationRole)));
}

void CustomTabWidget::addTab(QWidget *widget, const QIcon &icon, const QString &label)
{
    QTabWidget::addTab(widget,icon,label);
    setProfileByCount();
    setCurrentIndex(this->indexOf(widget));
}

void WWidgetStack::onNextControlChanged(double v) {
    if (v > 0.0) {
        setCurrentIndex((currentIndex() + 1) % count());
    }
}

void KexiCSVTextQuoteComboBox::setTextQuote(const QString& textQuote)
{
    QString q(textQuote.isEmpty() ? xi18n("None") : textQuote);
    setCurrentIndex(findText(q));
}

void QgsLocatorResultsView::selectNextResult()
{
  int nextRow = currentIndex().row() + 1;
  nextRow = nextRow % model()->rowCount( QModelIndex() );
  setCurrentIndex( model()->index( nextRow, 0 ) );
}

Tomahawk::result_ptr
TrackProxyModel::siblingItem( int itemsAway, bool readOnly )
{
    qDebug() << Q_FUNC_INFO;

    QModelIndex idx = index( 0, 0 );
    if ( rowCount() )
    {
        if ( m_shuffled )
        {
            // random mode is enabled
            // TODO come up with a clever random logic, that keeps track of previously played items
            idx = index( qrand() % rowCount(), 0 );
        }
        else if ( currentIndex().isValid() )
        {
            idx = currentIndex();

            // random mode is disabled
            if ( m_repeatMode != PlaylistInterface::RepeatOne )
            {
                // keep progressing through the playlist normally
                idx = index( idx.row() + itemsAway, 0 );
            }
        }
    }

    if ( !idx.isValid() && m_repeatMode == PlaylistInterface::RepeatAll )
    {
        // repeat all tracks
        if ( itemsAway > 0 )
        {
            // reset to first item
            idx = index( 0, 0 );
        }
        else
        {
            // reset to last item
            idx = index( rowCount() - 1, 0 );
        }
    }

    // Try to find the next available PlaylistItem (with results)
    while ( idx.isValid() )
    {
        TrackModelItem* item = itemFromIndex( mapToSource( idx ) );
        if ( item && item->query()->playable() )
        {
            qDebug() << "Next PlaylistItem found:" << item->query()->toString() << item->query()->results().at( 0 )->url();
            if ( !readOnly )
                setCurrentIndex( idx );
            return item->query()->results().at( 0 );
        }

        idx = index( idx.row() + ( itemsAway > 0 ? 1 : -1 ), 0 );
    }

    if ( !readOnly )
        setCurrentIndex( QModelIndex() );
    return Tomahawk::result_ptr();
}

void WStackedWidget::setCurrentIndex(int index)
{
  setCurrentIndex(index, animation_, autoReverseAnimation_);
}

void ListingTable::setCurrentPart(unsigned int id)
{
	setCurrentIndex(model->getIndexWithID(id));
}

void StackedWidget::selectPage( int index )
{
	if( index >= 0 && index < count() )
		setCurrentIndex( index );
}

Menu::Menu(QWidget *parent):
	QWidget(parent)
{
	setObjectName("Menu");
	isStay=isPoped=false;
	Utils::setGround(this,Qt::white);
	fileL=new QLineEdit(this);
	danmL=new QLineEdit(this);
	sechL=new QLineEdit(this);
	fileL->installEventFilter(this);
	danmL->installEventFilter(this);
	sechL->installEventFilter(this);
	fileL->setReadOnly(true);
	fileL->setPlaceholderText(tr("choose a local media"));
	danmL->setPlaceholderText(tr("input av/ac number"));
	sechL->setPlaceholderText(tr("search danmaku online"));
	fileL->setGeometry(QRect(10,25, 120,25));
	danmL->setGeometry(QRect(10,65, 120,25));
	sechL->setGeometry(QRect(10,105,120,25));
	connect(danmL,&QLineEdit::textEdited,[this](QString text){
		QRegularExpression regexp("(av|ac|dd)((\\d+)([#_])?(\\d+)?)?|[ad]");
		regexp.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
		auto iter=regexp.globalMatch(text);
		QString match;
		while(iter.hasNext()){
			match=iter.next().captured();
		}
		danmL->setText(match.toLower().replace('_','#'));
	});
	danmC=new QCompleter(new LoadModelWapper(Load::instance()->getModel(),tr("Load All")),this);
	danmC->setCompletionMode(QCompleter::UnfilteredPopupCompletion);
	danmC->setCaseSensitivity(Qt::CaseInsensitive);
	danmC->setWidget(danmL);
	QAbstractItemView *popup=danmC->popup();
	popup->setMouseTracking(true);
	connect(popup,SIGNAL(entered(QModelIndex)),popup,SLOT(setCurrentIndex(QModelIndex)));
	connect<void (QCompleter::*)(const QModelIndex &)>(danmC,&QCompleter::activated,[this](const QModelIndex &index){
		QVariant v=index.data(Load::UrlRole);
		if(!v.isNull()&&!v.toUrl().isValid()){
			Load::instance()->loadDanmaku();
		}
		else{
			Load::instance()->loadDanmaku(index);
		}
	});
	fileB=new QPushButton(this);
	sechB=new QPushButton(this);
	danmB=new QPushButton(this);
	fileB->setGeometry(QRect(135,25, 55,25));
	danmB->setGeometry(QRect(135,65, 55,25));
	sechB->setGeometry(QRect(135,105,55,25));
	fileB->setText(tr("Open"));
	danmB->setText(tr("Load"));
	sechB->setText(tr("Search"));
	fileA=new QAction(tr("Open File"),this);
	fileA->setObjectName("File");
	fileA->setShortcut(Config::getValue("/Shortcut/File",QString()));
	danmA=new QAction(tr("Load Danmaku"),this);
	danmA->setObjectName("Danm");
	danmA->setShortcut(Config::getValue("/Shortcut/Danm",QString()));
	sechA=new QAction(tr("Search Danmaku"),this);
	sechA->setObjectName("Sech");
	sechA->setShortcut(Config::getValue("/Shortcut/Sech",QString()));
	connect(fileA,&QAction::triggered,[this](){
		QString _file=QFileDialog::getOpenFileName(Local::mainWidget(),
												   tr("Open File"),
												   Utils::defaultPath(),
												   tr("Media files (%1);;All files (*.*)").arg(Utils::getSuffix(Utils::Video|Utils::Audio,"*.%1").join(' ')));
		if(!_file.isEmpty()){
			APlayer::instance()->setMedia(_file);
		}
	});
	connect(danmA,&QAction::triggered,[this](){
		if(Config::getValue("/Danmaku/Local",false)){
			QString _file=QFileDialog::getOpenFileName(Local::mainWidget(),
													   tr("Open File"),
													   Utils::defaultPath(),
													   tr("Danmaku files (%1);;All files (*.*)").arg(Utils::getSuffix(Utils::Danmaku,"*.%1").join(' ')));
			if(!_file.isEmpty()){
				Load::instance()->loadDanmaku(_file);
			}
		}
		else{
			if(danmL->text().isEmpty()){
				pop();
				isStay=true;
				danmL->setFocus();
			}
			else{
				Load::instance()->loadDanmaku(danmL->text());
			}
		}
	});
	connect(sechA,&QAction::triggered,[this](){
		Search searchBox(Local::mainWidget());
		sechL->setText(sechL->text().simplified());
		if(!sechL->text().isEmpty()){
			searchBox.setKey(sechL->text());
		}
		if(searchBox.exec()) {
//.........这里部分代码省略.........

void ItemViewWidget::updateDropSelection()
{
	setCurrentIndex(getIndex(qBound(0, m_dropRow, getRowCount()), 0));

	m_dropRow = -1;
}

void PlaylistTabBar::Close() {
  if (menu_index_ == -1) return;

  const int playlist_id = tabData(menu_index_).toInt();

  QSettings s;
  s.beginGroup(kSettingsGroup);

  const bool ask_for_delete = s.value("warn_close_playlist", true).toBool();

  if (ask_for_delete && !manager_->IsPlaylistFavorite(playlist_id) &&
      !manager_->playlist(playlist_id)->GetAllSongs().empty()) {
    QMessageBox confirmation_box;
    confirmation_box.setWindowIcon(QIcon(":/icon.png"));
    confirmation_box.setWindowTitle(tr("Remove playlist"));
    confirmation_box.setIcon(QMessageBox::Question);
    confirmation_box.setText(
        tr("You are about to remove a playlist which is not part of your "
           "favorite playlists: "
           "the playlist will be deleted (this action cannot be undone). \n"
           "Are you sure you want to continue?"));
    confirmation_box.setStandardButtons(QMessageBox::Yes | QMessageBox::Cancel);

    QCheckBox dont_prompt_again(tr("Warn me when closing a playlist tab"),
                                &confirmation_box);
    dont_prompt_again.setChecked(ask_for_delete);
    dont_prompt_again.blockSignals(true);
    dont_prompt_again.setToolTip(
        tr("This option can be changed in the \"Behavior\" preferences"));

    QGridLayout* grid = qobject_cast<QGridLayout*>(confirmation_box.layout());
    QDialogButtonBox* buttons = confirmation_box.findChild<QDialogButtonBox*>();
    if (grid && buttons) {
      const int index = grid->indexOf(buttons);
      int row, column, row_span, column_span = 0;
      grid->getItemPosition(index, &row, &column, &row_span, &column_span);
      QLayoutItem* buttonsItem = grid->takeAt(index);
      grid->addWidget(&dont_prompt_again, row, column, row_span, column_span,
                      Qt::AlignLeft | Qt::AlignTop);
      grid->addItem(buttonsItem, ++row, column, row_span, column_span);
    } else {
      confirmation_box.addButton(&dont_prompt_again, QMessageBox::ActionRole);
    }

    if (confirmation_box.exec() != QMessageBox::Yes) {
      return;
    }

    // If user changed the pref, save the new one
    if (dont_prompt_again.isChecked() != ask_for_delete) {
      s.setValue("warn_close_playlist", dont_prompt_again.isChecked());
    }
  }

  // Close the playlist. If the playlist is not a favorite playlist, it will be
  // deleted, as it will not be visible after being closed. Otherwise, the tab
  // is closed but the playlist still exists and can be resurrected from the
  // "Playlists" tab.
  emit Close(playlist_id);

  // Select the nearest tab.
  if (menu_index_ > 1) {
    setCurrentIndex(menu_index_ - 1);
  }

  // Update playlist tab order/visibility
  TabMoved();
}

void TimelineView::keyPressEvent(QKeyEvent *event){
    int i, next;
    if(!event->modifiers().testFlag(Qt::ShiftModifier) &&
       !event->modifiers().testFlag(Qt::ControlModifier) &&
       !event->modifiers().testFlag(Qt::AltModifier)){
        switch(event->key()){
        case Qt::Key_M:
            next = -1;
            for(i=model()->baseIndex()-1; i>=0; i--){
                if(isRelatedPost(i, model()->baseIndex())){
                    next = i;
                    break;
                }
            }
            if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
            return;
        case Qt::Key_N:
            next = -1;
            for(i=model()->baseIndex()+1; i<model()->count(); i++){
                if(isRelatedPost(i, model()->baseIndex())){
                    next = i;
                    break;
                }
            }
            if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
            return;
        case Qt::Key_I:
            emit favorite();
            return;
        case Qt::Key_H:
            next = -1;
            for(i=model()->baseIndex()+1; i<model()->count(); i++){
                if(model()->itemAt(i).userId() == model()->itemAt(model()->baseIndex()).userId()){
                    next = i;
                    break;
                }
            }
            if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
            return;
        case Qt::Key_J:
            QApplication::sendEvent(this, &QKeyEvent(QEvent::KeyPress, Qt::Key_Down, Qt::NoModifier));
            return;
        case Qt::Key_K:
            QApplication::sendEvent(this, &QKeyEvent(QEvent::KeyPress, Qt::Key_Up, Qt::NoModifier));
            return;
        case Qt::Key_L:
            next = -1;
            for(i=model()->baseIndex()-1; i>=0; i--){
                if(model()->itemAt(i).userId() == model()->itemAt(model()->baseIndex()).userId()){
                    next = i;
                    break;
                }
            }
            if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
            return;
        case Qt::Key_Space:
            jumpToUnread();
            return;
        case Qt::Key_Return:
            emit reply();
            return;
        default:
            break;
        }
    }
    if(event->modifiers().testFlag(Qt::ShiftModifier) &&
       !event->modifiers().testFlag(Qt::ControlModifier) &&
       !event->modifiers().testFlag(Qt::AltModifier)){
        switch(event->key()){
       case Qt::Key_M:
           next = -1;
           for(i=model()->baseIndex()-1; i>=0; i--){
               if(model()->itemAt(i).favorited()){
                   next = i;
                   break;
               }
           }
           if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
           return;
       case Qt::Key_N:
           next = -1;
           for(i=model()->baseIndex()+1; i<model()->count(); i++){
               if(model()->itemAt(i).favorited()){
                   next = i;
                   break;
               }
           }
           if(next>=0) setCurrentIndex(model()->index(next,currentIndex().column()));
           return;
       }
    }

    QTreeView::keyPressEvent(event);
}

void PlaylistTabBar::set_current_id(int id) { setCurrentIndex(index_of(id)); }