C 获取鼠标按钮状态非阻塞linux

我正在尝试为游戏编写插件，我需要读取鼠标按钮的状态，而不是阻止或吃掉事件。由于具有根访问权限，直接读取/dev/input不是一个选项。 我越接近我需要的是以下代码：

#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>


int main (int argc, char **argv)
{
Display *display;
XEvent ev;

display = XOpenDisplay(NULL);
Window window = RootWindow(display, XDefaultScreen(display));

XSelectInput(display, window, ButtonPressMask | ButtonReleaseMask);
XGrabButton(display, Button1, AnyModifier, window, False, ButtonPressMask | ButtonReleaseMask, GrabModeSync, GrabModeAsync, None, None);

while(1) {

XAllowEvents(display, ReplayPointer, CurrentTime);
    if(XCheckTypedEvent(display, ButtonPress ,&ev))
    {
        printf("Button pressed\n");
    }
    else if(XCheckTypedEvent(display, ButtonRelease ,&ev))
    {
        printf("Button relised\n");
    }

}

return 0;
}

问题是，通过设置GrabModeSync并使用XAllowEvents和ReplayPointer，我可以通过事件，但我只能按按钮。按钮释放从未被捕获，但我需要它。GrabModeAsync捕获这两个事件，但吃掉单击。 有人能提出解决办法吗？

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10倍

对于那些在寻找类似问题的解决方案时无意中读到这篇文章的人来说，这对我很有用

#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/extensions/XInput2.h>

static void select_events(Display *dpy, Window win)
{
    XIEventMask evmasks[1];
    unsigned char mask1[(XI_LASTEVENT + 7)/8];

    memset(mask1, 0, sizeof(mask1));

    /* select for button and key events from all master devices */
    XISetMask(mask1, XI_RawButtonPress);
    XISetMask(mask1, XI_RawButtonRelease);

    evmasks[0].deviceid = XIAllMasterDevices;
    evmasks[0].mask_len = sizeof(mask1);
    evmasks[0].mask = mask1;

    XISelectEvents(dpy, win, evmasks, 1);
    XFlush(dpy);
}

int main(){
Display *dpy;
XEvent ev;
XIEvent *xi_event;
XIRawEvent *xev;


XGenericEventCookie *cookie = &ev.xcookie;
dpy = XOpenDisplay(NULL);
select_events(dpy, DefaultRootWindow(dpy));
    int count = 0;
    while(1){
       if (XCheckTypedEvent(dpy, GenericEvent ,&ev)){

        if (cookie->type != GenericEvent ||
            !XGetEventData(dpy, cookie)){
            continue;
            }


        xi_event = (XIEvent *) cookie->data;
        xev = (XIRawEvent *) xi_event;
        switch (cookie->evtype) {
            case XI_RawButtonPress:
                printf("Button pressed %d %d\n", xev->detail, ++count);
                break;
            case XI_RawButtonRelease:
                printf("Button released %d %d\n", xev->detail, count);
                break;
            }

        XFreeEventData(dpy, cookie);
        }
    }

    return 1;
}

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你自己解决这个问题——这是值得的。