自学教程：C++ updateData函数代码示例

void Transfer::onClick_pbSeparate(){    _data[cbSubsidized->currentIndex()-1]->clearTransfer();    _data[cbBuyer->currentIndex()-1]->clearTransfer();    emit updateData(2,true);    onClick_pbBack();}

void UIStateHelper::setWidgetEnabled(QWidget *widget, bool enabled){	mWidgetEnabled[widget] = enabled;	QMap<long, UIStateHelperData*>::iterator dataIt;	for (dataIt = mData.begin(); dataIt != mData.end(); ++dataIt) {		updateData(*dataIt);	}}

void DefectsEditor::removeRow(){    QModelIndex index = tableView->selectionModel()->currentIndex();    QAbstractItemModel* model = tableView->model();    if (model->removeRows(index.row(), 1, index.parent())) {        //updateActions();        updateData(index, index);    }}

void UIWater::updatePos(int newTileX, int newTileY){	if (tileX == newTileX && tileY == newTileY) return;	tileX = newTileX;	tileY = newTileY;	updateData();}

void Calendar::setStartDate(const QDate &dateTime){  if (m_startDate == dateTime) {    return;  }  m_startDate = dateTime;  updateData();  emit startDateChanged();}

/** * @details Constructs a ParameterWidget object. */ParameterWidget::ParameterWidget(const boost::shared_ptr<ParameterQObject>& p,                                 QWidget* parent)    : QWidget(parent), _param(p){    connect( p.get(), SIGNAL( updated() ),             this, SLOT( updateData() ) );    connect( p.get(), SIGNAL( updatedSelection() ),             this, SLOT( doSelectionUpdate() ) );}

void SpeedWrapper::gconf_value_changed(){    bool ok;    //check netspeed enabled    if(!m_gconf_enabled->value().isValid())        m_gconf_enabled->set(true);    //check netspeed interface    if(!m_gconf_speed_interface->value().isValid())        m_gconf_speed_interface->set("wlan0");    //check netspeed update time    if(!m_gconf_update_time->value().isValid())        m_gconf_update_time->set(1000);    //check when online    if(!m_gconf_when_online->value().isValid())        m_gconf_when_online->set(false);    m_is_enabled = m_gconf_enabled->value().toBool();    m_speed_interface = m_gconf_speed_interface->value().toString();    m_when_online = m_gconf_when_online->value().toBool();    if(m_speed_interface.isEmpty() || m_speed_interface.isNull())        m_speed_interface = "wlan0";    m_update_time = m_gconf_update_time->value().toInt(&ok);    if(!ok)        m_update_time = 1000;    QNetworkInterface interface = QNetworkInterface::interfaceFromName(m_speed_interface);    m_network_interface_valid = interface.isValid();    bool online = (interface.flags().testFlag(QNetworkInterface::IsUp) &&                  interface.flags().testFlag(QNetworkInterface::IsRunning));    if(online != m_isOnline)    {        emit onlineChanged(online);        updateData();    }    m_isOnline = online;    if(m_is_enabled)    {        if(m_when_online)        {            if(m_isOnline)            {                m_timer->stop();                m_timer->start(m_update_time);            }else{                m_timer->stop();            }        }else{            m_timer->stop();            m_timer->start(m_update_time);        }    }else{        m_timer->stop();    }}

QSize UIInformationItem::sizeHint(const QStyleOptionViewItem & /* option */, const QModelIndex &index) const{    /* Update data: */    updateData(index);    if (m_text.isEmpty())        return QSize(0, 0);    /* Return size: */    return m_pTextDocument->size().toSize();}

void FormJoinGame::show(QByteArray data){    clearLabels();    updateData(data);    updateListOfGames();    show();}

void ObjectEditorWidget::onCurrentWorkingObjectChanged(int index){    if (mObjectsHierarchy.isEmpty() || index < 0 || index >= mObjectsHierarchy.size() || index == mObjectsHierarchy.indexOf(mCurrentObject))        return;    mCurrentObject = mObjectsHierarchy[index];    updateData(mCurrentObject);    if (DrawingSurfaceWidget::instance())        DrawingSurfaceWidget::instance()->update();}

void FChart3d::on_SetFloorStyle(){    QAction *clickedStyle = qobject_cast<QAction *>(sender());    int _Style = clickedStyle->data().toInt();    this->setFloorStyle(Qwt3D::FLOORSTYLE(_Style));    updateData();    updateGL();}

void* MainWindow::getData(void){    while(isConnected)    {        sig_getData();        updateData();        QThread::msleep(100);    }    return NULL;}

void UIStateHelper::setActive(int index, bool active){	UIStateHelperData *data = findData(index, false);	if (!data) {		return;	}	data->mActive = active;	updateData(data);}

void CActionsWidget::on_tbnEdit_clicked(){    QTreeWidgetItem *selectedItem = ui->twActions->currentItem();    if(selectedItem)    {        CActionDialog actionDialog(mConnectionName, selectedItem->text(ID).toInt(), this);        connect(&actionDialog, SIGNAL(dataWasUpdated()), this, SLOT(updateData()));        actionDialog.exec();    }}

void RayCloudPlot::setStart(NDArray start){    bool success;    auto conv = make3d(start, success);    if (!success)        return;    m_start = conv;    updateData();    emit startChanged(start);}

void TrayToolTip::refresh(){	updateData();	if(isVisible())	{		if(QApplication::widgetAt(QCursor::pos()) != m_object)			hide();		else			redraw();	}}

KdeConnectDevicesModel::KdeConnectDevicesModel(QObject *parent)    : QAbstractListModel(parent){    daemon = new QDBusInterface("org.kde.kdeconnect", "/modules/kdeconnect", "org.kde.kdeconnect.daemon");    QDBusConnection::sessionBus().connect("org.kde.kdeconnect", "/modules/kdeconnect", "org.kde.kdeconnect.daemon", "deviceAdded", this, SLOT(updateData()));    QDBusConnection::sessionBus().connect("org.kde.kdeconnect", "/modules/kdeconnect", "org.kde.kdeconnect.daemon", "deviceRemoved", this, SLOT(updateData()));    QDBusConnection::sessionBus().connect("org.kde.kdeconnect", "/modules/kdeconnect", "org.kde.kdeconnect.daemon", "deviceRemoved", this, SLOT(deviceVisibilityChanged()));    updateData();}

/** * Draw a filled rectangle. */uint8_t SED1531::drawBox(uint8_t left, uint8_t top, uint8_t width, uint8_t height, uint8_t color){    uint8_t x;    uint8_t mask;    uint8_t data = 0x00;    uint8_t page = top / 8;    uint8_t bit = 1 << (top % 8);    uint8_t collision=0;    while(height != 0)    {        data |= bit;        --height;        bit <<= 1;        if(bit == 0 || height == 0)        {            mask = color != GLCD_COLOR_INVERT ? ~data : 0xFF;            if(color == GLCD_COLOR_CLEAR)            {                data = 0;            }            pageUpdateStart(page, left);            if(mask == 0x00)            {                /* The entire byte is to be overwritten so                   don't bother with read-modify-write. */                GLCD_IO_PIN_A0_1();                sendRepeated(data, width);            }            else            {                if(color == GLCD_COLOR_COLLISION)                 {                	mask = 0x00;	//only detect collision, do not write anything                 }                for(x = 0; x < width; ++x)                {                    if (updateData(data, mask)) collision=1;                }            }            pageUpdateEnd();            ++page;            data = 0x00;            bit = 0x01;        }    }    return collision;}

PopupWnd2::PopupWnd2(POPUPDATA2 *ppd, POPUPOPTIONS *theCustomOptions, bool renderOnly){	m_signature = POPUP_OBJECT_SIGNARURE;	m_textType = TT_NONE;	m_options = theCustomOptions ? theCustomOptions : &PopupOptions;	m_hfnText = fonts.text;	m_hfnTitle = fonts.title;	updateData(ppd);	if (!renderOnly)		startThread();}

void TrainerMenu::on_profileList_currentIndexChanged(int){    if (ui->profileList->currentText() == team().name()) {        return;    }    QSettings s;    QString path = s.value("Profile/Path").toString() + "/" + QUrl::toPercentEncoding(ui->profileList->currentText()) + ".xml";    s.setValue("Profile/Current", path);    team().profile().loadFromFile(path);    updateData();}

// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>void SpectrumWidget::setSpectrum(double freqNyquist,                                 const Math::ComplexArray &spec,                                 Processing::Response *resp,                                 QString exportBasename) {	_exportBasename = exportBasename;	_freqNyquist = freqNyquist;	_spec = spec;	_resp = resp;	updateData();	update();}

TrayToolTip::TrayToolTip(QWidget* parent)	: BaseToolTip(0, parent){	m_speeds[0].fill(0, VALUES);	m_speeds[1].fill(0, VALUES);		resize(WIDTH, HEIGHT);	setAlignment(Qt::AlignTop);	placeMe();		updateData();}

ModuleManager::ModuleManager() :    __airportTracker(new AirportTracker()),    __flightTracker(new FlightTracker()),    __modelsMatcher(new ModelMatcher()),    __vatbookHandler(new VatbookHandler()) {  connect(VatsinatorApplication::getSingletonPtr(), SIGNAL(glInitialized()),          this,                                     SLOT(__initAfterGL()),          Qt::DirectConnection);  connect(VatsinatorApplication::getSingletonPtr(), SIGNAL(dataUpdated()),          this,                                     SLOT(updateData()),          Qt::DirectConnection);}

int main(int argc, char * *argv) {	int index = my_get_opt(argc, argv);		//parameter	char * table = argv[index];	char * action = argv[index+1];		struct DatabaseConfig config;	config.server = "localhost";	config.database = "mytable";	config.table = table;	FooOBJ fobj;	fobj=newFooOBJ(config); /* create a new object of type "FooOBJ" */		memset(username,0,SIZE);	memset(password,0,SIZE);	/*read config*/	if(!readConfig()){		fprintf(stderr,"read config fail!");		return 1;	}				/* Change me */	char * server = "localhost";	char * database = "mytable";	//use oop db connection	connetDatabase(fobj, username, password);	if( strcmp(action,"list") == 0 ){		listData(fobj);	}	if( strcmp(action,"add") == 0 ){		addData(fobj, argv[index+2]);	}	if( strcmp(action,"del") == 0 ){		delData(fobj, atoi(argv[index+2]));			}	if( strcmp(action,"update") == 0 ){		updateData(fobj, atoi(argv[index+2]), argv[index+3]);	}		closeConnection(fobj);		deleteFooOBJ(fobj);	return 0;}

void MApplicationMenuButtonView::setupModel(){    MButtonView::setupModel();    QList<const char*> modifications;    modifications << MButtonModel::IconID;    modifications << MButtonModel::IconVisible;    modifications << MApplicationMenuButtonModel::ProgressIndicatorVisible;    modifications << MApplicationMenuButtonModel::ArrowIconVisible;    updateData(modifications);    update();}