Function event_loop

demos/glthreadsint.c:384–488

* The main process thread runs this loop. * Single display connection for all threads. */

 * Single display connection for all threads.
 */
static void
event_loop(Display *dpy)
{
   XEvent event;
   int i;

   assert(!MultiDisplays);

   while (!ExitFlag) {

      while (1) {
         int k;
         LOCK(dpy);
         k = XPending(dpy);
         if (k) {
            XNextEvent(dpy, &event);
            UNLOCK(dpy);
            break;
         }
         UNLOCK(dpy);
         usleep(5000);
      }

      switch (event.type) {
         case ConfigureNotify:
            /* Find winthread for this event's window */
            for (i = 0; i < NumWinThreads; i++) {
               struct winthread *wt = &WinThreads[i];
               if (event.xconfigure.window == wt->Win) {
                  resize(wt, event.xconfigure.width,
                         event.xconfigure.height);
                  pthread_mutex_unlock(&wt->Ready);
                  break;
               }
            }
            break;
         case MotionNotify:
            /* Find winthread for this event's window */
            for (i = 0; i < NumWinThreads; i++) {
               struct winthread *wt = &WinThreads[i];
               if (event.xmotion.window == wt->Win) {
                  if (event.xmotion.state & Button1Mask ||
                      event.xmotion.state & Button2Mask ||
                      event.xmotion.state & Button3Mask ||
                      event.xmotion.state & Button4Mask ||
                      event.xmotion.state & Button5Mask) {
                     wt->AngleX += (float) (event.xmotion.x -
                                            wt->MotionStartX) /
                                   (float) wt->WinWidth * 180.;
                     wt->AngleY += (float) (event.xmotion.y -
                                            wt->MotionStartY) /
                                   (float) wt->WinHeight * 180.;
                     wt->MotionStartX = event.xmotion.x;
                     wt->MotionStartY = event.xmotion.y;
                  }
                  pthread_mutex_unlock(&wt->Ready);
                  break;
               }