C++ (Cpp) QFormLayout::isEmpty示例

void ConfigObjectDialog::addHardwareParametersGroup(QLayout *parent) {
    list<SpmcPeripheral*> peripherals = object->getPeripherals();

    QVBoxLayout* layout = new QVBoxLayout();

    QWidget* widget = new QWidget();
    QFormLayout* paramsLayout = new QFormLayout();
    widget->setLayout(paramsLayout);
    QVBoxLayout* pinLayout = new QVBoxLayout();
    for (list<SpmcPeripheral*>::iterator i = peripherals.begin(); i != peripherals.end(); i++) {
        if (!((*i)->getParameters().empty())) {
            addParameters(paramsLayout, (*i)->getParameters());
        }
        map<string, list<PeripheralPort*> > ports = (*i)->getPorts();

        for (map<string, list<PeripheralPort*> >::iterator i = ports.begin(); i != ports.end(); i++) {
            addPortsGroup(pinLayout, i->first, i->second);
        }
    }
    addGroup(layout, "Pins", pinLayout);

    QWidget* tpWidget = new QWidget();
    QFormLayout* tpLayout = new QFormLayout();
    tpWidget->setLayout(tpLayout);
    addParameters(tpLayout, object->getTimestampPinParameters());
    pinLayout->addWidget(tpWidget);

    if (!paramsLayout->isEmpty()) {
        layout->insertWidget(0, widget);
    } else {
        widget->deleteLater();
    }

    addGroup(parent, "Hardware Parameter", layout);
}