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我正在玩 xlib，我有这样的东西可以在窗口/子窗口的基础上检查事件：

// Dispatch X11 events in a more friendly format
static inline bool xwin_event(xwin_t *xwin, event_t *evt) {
    XEvent event;
    if (!XCheckWindowEvent(xwin->xconn->dpy, xwin->window, 0xFFFFFFFF, &event)) {
        return false;
    }

    if (event.type == ClientMessage) {
        printf("Got event, wid: %i\n", event.xany.window);
    }
}

我循环调用。我正在建造我的窗户：

// Define events we want
XSelectInput(xconn->dpy, xwin->window,
             KeyPressMask        | 
             ButtonPressMask     | ButtonReleaseMask |
             EnterWindowMask     | LeaveWindowMask   |
             PointerMotionMask   | ExposureMask      |
             StructureNotifyMask | SubstructureNotifyMask);

// Grab some window manager events
xwin->proto = XInternAtom(xconn->dpy, "WM_PROTOCOLS",     1);
xwin->close = XInternAtom(xconn->dpy, "WM_DELETE_WINDOW", 0);
XSetWMProtocols(xconn->dpy, xwin->window, &xwin->close, 1);

出于某种原因，我从来没有看到任何 ClientMessage 事件从队列中出来。如果我检查这样的事情（这不允许我按窗口过滤）：

if (!XPending(xwin->xconn->dpy)) {
    return false;
}

XNextEvent(xwin->xconn->dpy, &event);

它通过就好了。这是一个已知的问题？

4

1 回答 1

2

是的，手册页XCheckWindowEvent明确表示

XCheckWindowEvent() 不能返回 ClientMessage、MappingNotify、SelectionClear、SelectionNotify 或 SelectionRequest 事件，因为这些事件类型根据定义是不可屏蔽的。

于 2012-04-13T08:29:30.537 回答