Qt Documentation

Climate Control Widget Example

This example shows how to access the climate control from C++.

This example shows how to access the climate control from the C++.

The first thing to do is to create a QIviClimateControl instance in our MainWindow constructor. As we only have one Climate backend and don't want to choose which one to use, we call startAutoDiscovery to start searching for a suitable backend right away and pick the first one that matches.

Note: To simplify the deployment process, this example loads a simulation backend.

isValid() is used for verifying that the autoDiscovery found a backend:

    m_climateControl = new QIviClimateControl(QString(), this);
    m_climateControl->setDiscoveryMode(QIviAbstractFeature::LoadOnlySimulationBackends);
    m_climateControl->startAutoDiscovery();

    if (!m_climateControl->isValid())
        QMessageBox::critical(this, tr("Auto Discovery Failed !"), tr("No Climate Backend available"));

The constructor then continues to connect the climate control attribute change signals to the UI components:

    //Air Flow Direction
    setupFlowDirectionRadioButtons(m_climateControl->airflowDirections());
    connect(m_buttonGroup, static_cast<void (QButtonGroup::*)(QAbstractButton *, bool)>(&QButtonGroup::buttonToggled),
            this, &MainWindow::onFlowDirectionButtonToggled);

    connect(m_climateControl, &QIviClimateControl::airflowDirectionsChanged,
            this, &MainWindow::setupFlowDirectionRadioButtons);

    //Air Condition
    ui->cb_airCondition->setChecked(m_climateControl->isAirConditioningEnabled());
    connect(m_climateControl, &QIviClimateControl::airConditioningEnabledChanged,
            ui->cb_airCondition, &QCheckBox::setChecked);
    connect(ui->cb_airCondition, &QCheckBox::clicked,
            m_climateControl, &QIviClimateControl::setAirConditioningEnabled);

    //Air Recirculation
    ui->cb_airRecirculation->setChecked(m_climateControl->recirculationMode() == QtIviVehicleFunctionsModule::RecirculationOn);
    connect(m_climateControl, &QIviClimateControl::recirculationModeChanged,
            this, &MainWindow::onAirRecirculationModeChanged);
    connect(ui->cb_airRecirculation, &QCheckBox::clicked,
            this, &MainWindow::setAirRecirculationEnabled);

    //Heater
    ui->cb_heater->setChecked(m_climateControl->isHeaterEnabled());
    connect(m_climateControl, &QIviClimateControl::heaterEnabledChanged,
            ui->cb_heater, &QCheckBox::setChecked);
    connect(ui->cb_heater, &QCheckBox::clicked,
            m_climateControl, &QIviClimateControl::setHeaterEnabled);
}

Airflow direction is controlled using these functions:

void MainWindow::setupFlowDirectionRadioButtons(QtIviVehicleFunctionsModule::AirflowDirections direction)
{
    ui->cb_windshield->setChecked(direction.testFlag(QtIviVehicleFunctionsModule::Windshield));
    ui->cb_dashboard->setChecked(direction.testFlag(QtIviVehicleFunctionsModule::Dashboard));
    ui->cb_floor->setChecked(direction.testFlag(QtIviVehicleFunctionsModule::Floor));
}

void MainWindow::onFlowDirectionButtonToggled(QAbstractButton *button, bool checked)
{
    Q_UNUSED(button)
    Q_UNUSED(checked)

    QtIviVehicleFunctionsModule::AirflowDirections direction;

    if (ui->cb_windshield->isChecked())
        direction |= QtIviVehicleFunctionsModule::Windshield;
    if (ui->cb_dashboard->isChecked())
        direction |= QtIviVehicleFunctionsModule::Dashboard;
    if (ui->cb_floor->isChecked())
        direction |= QtIviVehicleFunctionsModule::Floor;

    m_climateControl->setAirflowDirections(direction);
}

Example project @ code.qt.io

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