X11: キーボードのグラブ

#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include "util.h"

int main(int argc,char **argv)
{
    Display *disp;
    XSetWindowAttributes attr;
    Window win,root;
    XEvent ev;
    int keycode;
    
    disp = XOpenDisplay(NULL);
    if(!disp) return 1;

    set_display(disp);

    root = DefaultRootWindow(disp);

    //ウィンドウ作成

    attr.background_pixel = 0;
    attr.event_mask = ButtonPressMask
        | KeyPressMask | KeyReleaseMask | FocusChangeMask;

    win = XCreateWindow(disp, root,
        0, 0, 200, 200, 0,
        CopyFromParent, CopyFromParent, CopyFromParent,
        CWBackPixel | CWEventMask, &attr);

    XMapWindow(disp, win);

    //グラブ

    keycode = XKeysymToKeycode(disp, XK_F11);

    XGrabKey(disp, keycode, AnyModifier, root,
        False, GrabModeAsync, GrabModeAsync);

    printf("root: 0x%lx\nwindow: 0x%lx\ngrab: %d\n", root, win, keycode);

    //イベント

    while(1)
    {
        XNextEvent(disp, &ev);

        switch(ev.type)
        {
            case KeyPress:
            case KeyRelease:
                printf("- [Key%s] window(0x%lx) x(%d) y(%d) keycode(%u)\n",
                    (ev.type == KeyPress)? "Press": "Release",
                    ev.xkey.window, ev.xkey.x, ev.xkey.y, ev.xkey.keycode);

                put_state(ev.xkey.state);

                if(ev.type == KeyPress && ev.xkey.keycode == keycode
                    && (ev.xkey.state & ShiftMask))
                {
                    XUngrabKeyboard(disp, ev.xkey.time);
                    printf("# ungrab\n");
                }

                fflush(stdout);
                break;
            case FocusIn:
            case FocusOut:
                printf("* [Focus%s] window(0x%lx) mode(%d) detail(%d)\n",
                    (ev.type == FocusIn)? "In": "Out",
                    ev.xkey.window, ev.xfocus.mode, ev.xfocus.detail);
                fflush(stdout);
                break;
            case ButtonPress:
                goto END;
        }
    }

END:
    XCloseDisplay(disp);

    return 0;
}