Question

我使用fedora 14系统。当我使用starx启动桌面系统时，我创建了一个Xlib程序，代码如下：

    Atom wmStateAbove = XInternAtom(display, "_NET_WM_STATE_ABOVE",1);
    if(wmStateAbove != None)
            printf("_NET_WM_STATE_ABOVE has atom of %ld \n", (long)wmStateAbove);
    else
            printf("ERROR: can't find atom for _NET_WM_STATE_Above! \n");

    Atom wmNetWmState = XInternAtom(display, "_NET_WM_STATE", 1);
    if(wmNetWmState != None)
            printf("_NET_WM_STATE has atom of %ld \n", (long)wmNetWmState);
    else
            printf("ERROR: can't find atom for _NET_WM_STATE! \n");



    if(wmStateAbove != None)
    {
            printf("======\n");
            XClientMessageEvent xclient;
            memset(&xclient, 0, sizeof(xclient));

            xclient.type = ClientMessage;
            xclient.window = win;
            xclient.message_type = wmNetWmState;
            xclient.format = 32;
            xclient.data.l[0] = 1;
            xclient.data.l[1] = wmStateAbove;
            xclient.data.l[2] = 1;
            xclient.data.l[3] = 1;
            xclient.data.l[4] = 0;

            printf(" default Window %d \n", DefaultRootWindow(display));
            XSendEvent(display,
            DefaultRootWindow(display), False,
            SubstructureRedirectMask | SubstructureNotifyMask,
            (XEvent*)&xclient);

可以在顶部创建窗口但如果我使用xinit启动桌面系统，xinitrc脚本如下：

enter image description here

程序无法正常工作，提示_NET_WM_STATE和_NET_WM_STATE_ABOVE找不到，窗口不能放在顶部，是什么原因？

Answer 1

如果此代码在窗口管理器启动并准备对消息作出响应之前执行，则在启动时执行此操作可能会很棘手。

该事件中也有一个错误； xclient.data.l [2]应该为0，而不是1。https://specifications.freedesktop.org/wm-spec/wm-spec-latest.html#idm46035372536800

xinit窗口始终位于_NET_WM_STATE _NET_WM_STATE_ABOVE顶部

1 个答案: