Method initialize

source/MRViewer/MRSpaceMouseHandlerWinEvents.cpp:25–94

{

bool HandlerWinEvents::initialize()
{
    auto window = getViewerInstance().window;
    if ( !window )
    {
        assert( !"no glfw window while trying to initialize SpaceMouse::HandlerWinEvents" );
        return false;
    }
    auto winHndl = glfwGetWin32Window( window );
    if ( !winHndl )
    {
        assert( !"no window handler while trying to initialize SpaceMouse::HandlerWinEvents" );
        return false;
    }

    std::array<RAWINPUTDEVICE, 1> rawDevices;
    for ( auto& rawDevice : rawDevices )
    {
        rawDevice.usUsagePage = HID_USAGE_PAGE_GENERIC;
        rawDevice.usUsage = HID_USAGE_GENERIC_MULTI_AXIS_CONTROLLER;
        rawDevice.hwndTarget = winHndl;
        rawDevice.dwFlags = 0;
    }
    if ( !RegisterRawInputDevices( rawDevices.data(), unsigned( rawDevices.size() ), sizeof( RAWINPUTDEVICE ) ) )
    {
        spdlog::warn( "Could not register raw devices" );
        return false;
    }

    auto handler = Win32MessageHandler::getHandler( winHndl );
    if ( !handler || !handler->isValid() )
    {
        assert( !"invalid Win32MessageHandler while trying to initialize SpaceMouse::HandlerWinEvents" );
        return false;
    }

    winHandler_ = std::move( handler );

    auto processRawInput = [this] ( HWND, UINT message, WPARAM /*wParam*/, LPARAM lParam )->bool
    {
        if ( message != WM_INPUT )
            return false;

        RAWINPUT rawInput;
        UINT rawSize = sizeof( RAWINPUT );
        GetRawInputData( ( HRAWINPUT )lParam, RID_INPUT, &rawInput, &rawSize, sizeof( RAWINPUTHEADER ) );
        if ( rawInput.header.dwType != RIM_TYPEHID )
            return false;

        resetDevice_( rawInput.header.hDevice );
        
        Action action;
        DataPacketRaw rawPacket;
        unsigned packetSize = rawInput.data.hid.dwSizeHid;
        std::copy( rawInput.data.hid.bRawData, rawInput.data.hid.bRawData + std::min( size_t( rawInput.data.hid.dwSizeHid ), rawPacket.size() ), rawPacket.data() );
        device_->parseRawEvent( rawPacket, packetSize, action );

        ++numMsg_;