Method open

src/SFML/Window/Android/JoystickImpl.cpp:112–177

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
bool JoystickImpl::open(unsigned int index)
{
    if (index >= Joystick::Count)
        return false;

    // Retrieve activity states
    ActivityStates&       states = getActivity();
    const std::lock_guard lock(states.mutex);

    auto jni = Jni::attachCurrentThread(*states.activity);
    if (!jni)
    {
        err() << "Failed to initialize JNI" << std::endl;
        return false;
    }

    auto inputDeviceClass = JniInputDeviceClass::findClass(jni->getEnv());
    if (!inputDeviceClass)
        return false;

    auto deviceIds = inputDeviceClass->getDeviceIds();
    if (!deviceIds)
        return false;

    unsigned foundGamepadsSoFar = 0;
    for (jsize i = 0; i < deviceIds->getLength(); ++i)
    {
        const auto deviceId    = (*deviceIds)[i];
        auto       inputDevice = inputDeviceClass->getDevice(deviceId);
        if (!inputDevice)
            continue;

        if (!inputDevice->supportsSource(AINPUT_SOURCE_GAMEPAD | AINPUT_SOURCE_JOYSTICK))
            continue;

        if (foundGamepadsSoFar < index)
        {
            ++foundGamepadsSoFar;
            continue;
        }

        // Found device might be already registered. It might be even registered for
        // another joystick index. So skip that and search for some other.
        if (states.joystickStates.find(deviceId) != states.joystickStates.end())
            continue;

        if (const auto capabilities = getCapabilitiesFromJni(*inputDevice))
            m_capabilities = *capabilities;
        else
            return false;

        m_identification = Joystick::Identification{
            inputDevice->getName(),
            inputDevice->getVendorId(),
            inputDevice->getProductId(),
        };

        m_currentDeviceIdx = deviceId;