Method KeyUp

libop/input/keyboard/WinKeyboard.cpp:164–222

}

long WinKeyboard::KeyUp(long vk_code) {
    long ret = 0;
    // vk_code = toupper(vk_code);
    switch (_mode) {
    case INPUT_TYPE::IN_NORMAL: {

        INPUT Input = {0};
        Input.type = INPUT_KEYBOARD;
        Input.ki.wVk = static_cast<WORD>(vk_code);
        Input.ki.wScan = 0;
        Input.ki.dwFlags = KEYEVENTF_KEYUP;

        /*The function returns the number of events that it successfully inserted into the keyboard or mouse input
        stream. If the function returns zero, the input was already blocked by another thread. To get extended error
        information, call GetLastError. This function fails when it is blocked by UIPI. Note that neither GetLastError
        nor the return value will indicate the failure was caused by UIPI blocking.
        */
        ret = ::SendInput(1, &Input, sizeof(INPUT));
        break;
    }
    case INPUT_TYPE::IN_NORMAL2: {
        INPUT Input = {0};
        Input.type = INPUT_KEYBOARD;
        Input.ki.wVk = 0;
        Input.ki.wScan = MapVirtualKey(vk_code, MAPVK_VK_TO_VSC);
        Input.ki.dwFlags = KEYEVENTF_SCANCODE | KEYEVENTF_KEYUP;
        // 抬键时保持和按下阶段一致的扩展键标志。
        if (key_message::IsExtendedVirtualKey(static_cast<UINT>(vk_code)))
            Input.ki.dwFlags |= KEYEVENTF_EXTENDEDKEY;
        ret = ::SendInput(1, &Input, sizeof(INPUT));
        if (ret == 0)
            setlog("op:IN_NORMAL2 erro code:%s", GetLastErrorAsString().c_str());
        break;
    }

    case INPUT_TYPE::IN_WINDOWS: {
        // 抬键时保持和按下阶段一致的消息类型与 lParam 位语义。
        const bool use_system_message = is_alt_vk(vk_code) || _alt_down;
        const bool alt_context = _alt_down && !is_alt_vk(vk_code);
        const UINT message = use_system_message ? WM_SYSKEYUP : WM_KEYUP;
        const LPARAM lparam = key_message::BuildKeyLParam(static_cast<UINT>(vk_code), true, alt_context);

        ret = message::SendTimeout(_hwnd, message, vk_code, lparam);
        if (ret == 0)
            setlog("error code=%d", GetLastError());
        else {
            if (is_shift_vk(vk_code))
                _shift_down = false;
            else if (is_ctrl_vk(vk_code))
                _ctrl_down = false;
            else if (is_alt_vk(vk_code))
                _alt_down = false;
        }
        break;
    }
    }

    return ret;