refresh_devices()

size_t MayaFlux::Core::TabletBackend::refresh_devices ( )

overridevirtual

Refresh the device list.

Returns

Number of devices found

Re-enumerates available devices. May trigger device callbacks for newly connected or disconnected devices.

Implements MayaFlux::Core::IInputBackend.

Definition at line 560 of file TabletBackend.cpp.

{
    if (!m_initialized.load()) {
        return 0;
    }
 
    hid_device_info* devs = hid_enumerate(0x0, 0x0);
 
    for (hid_device_info* cur = devs; cur != nullptr; cur = cur->next) {
        if (!m_config.probe_all_devices
            && cur->usage_page != k_page_digitizer
            && cur->usage_page != 0)
            continue;
 
        std::string path(cur->path);
 
        {
            std::lock_guard lock(m_devices_mutex);
            if (m_devices.find(path) != m_devices.end())
                continue;
        }
 
        std::string name = widen_to_narrow(cur->product_string);
        if (name.empty())
            name = "Tablet";
 
        adopt_device(path, cur->vendor_id, cur->product_id, std::move(name));
    }
 
    hid_free_enumeration(devs);
 
    std::lock_guard lock(m_devices_mutex);
    return m_tools.size();
}

References adopt_device(), m_config, m_devices, m_devices_mutex, m_initialized, m_tools, and MayaFlux::Core::TabletBackend::Config::probe_all_devices.

Referenced by initialize().

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