如何拦截消息:"WM_QUIT || WM_DESTROY || WM_CLOSE"WinAPI

Question

我将此代码用于主循环(我的函数):

    while (running)
{
    if(is_close)
    {
        Log().push_log("close", "message close!", logInfo);
        running = active = false;

        break;
    }

    while (PeekMessage(&msg, g_hWnd, 0, 0, PM_REMOVE))
    {
        std::cout << "Wnd: " << msg.message << std::endl;

        if (msg.message == WM_QUIT || msg.message == WM_DESTROY || msg.message == WM_CLOSE)
        {
            MessageBox(0, "Hello, World", "Hello", MB_OK);
            running = false;
        }
        // TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    if (running && active)
        render.DrawObject(g_hDC);
}

那么,我使用WndProc:

LRESULT CALLBACK GLWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    std::cout << "Wnd Proc: " << msg << std::endl;

    return DefWindowProc(hWnd, msg, wParam, lParam);
}

当我试图获取消息WM_QUIT时WM_DESTROY,或者WM_CLOSE在我的函数中,它不起作用.我的功能没有看到消息.

我该怎么收到这条消息？

Answer 1

PeekMessage或GetMessage将仅返回使用PostMessage()发布到消息队列的消息.这永远不会是WM_CLOSE或WM_DESTROY,这些消息与SendMessage()一起发送,直接传递给窗口过程而不进入消息队列.除非你的代码中有一个PostQuitMessage()调用,否则你不会得到WM_QUIT.

你真的必须为你的主窗口编写一个窗口过程.简单地处理WM_DESTROY并调用PostQuitMessage(0)就足够了.

LRESULT CALLBACK GLWindowProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    if (msg == WM_DESTROY) PostQuitMessage(0);
    return DefWindowProc(hWnd, msg, wParam, lParam);
}

你现在可以在游戏循环中获得WM_QUIT.