add Jtk_CheckEvent()

src/gui/jtk/Jtk_event.cc

@@ -335,47 +335,55 @@ static bool ProcessXEvent(XEvent * x_event, Jtk_Event * event)
     return false;
 }
 
+bool Jtk_CheckEvent(Jtk_Event * event)
+{
+    /* First check for an X event. */
+    while (XPending(g_display) > 0)
+    {
+        XEvent x_event;
+        XNextEvent(g_display, &x_event);
+        if (ProcessXEvent(&x_event, event))
+            return true;
+    }
+
+    /* Next check if any timer has expired. */
+    size_t timer_id = Jtk_GetExpiredTimer();
+    if (timer_id != (size_t)-1)
+    {
+#if 0
+        auto it = g_key_repeat_timers.find(timer_id);
+        if (it != g_key_repeat_timers.end())
+        {
+            event->type = JTK_EVENT_KEY_PRESS;
+            event->key.repeat = true;
+            event->key.key = XKeyToJtkKey(it->second);
+            event->key.x_keycode = it->second;
+        }
+        else
+        {
+#endif
+            event->type = JTK_EVENT_TIMER;
+            event->timer.timer_id = timer_id;
+            event->timer.user1 = Jtk_GetTimerUserData(timer_id, 0u);
+            event->timer.user2 = Jtk_GetTimerUserData(timer_id, 1u);
+#if 0
+        }
+#endif
+        Jtk_ServiceTimer(timer_id);
+        return true;
+    }
+
+    return false;
+}
+
 void Jtk_WaitEvent(Jtk_Event * event)
 {
     for (;;)
     {
-        /* First check for an X event. */
+        if (Jtk_CheckEvent(event))
-        while (XPending(g_display) > 0)
-        {
-            XEvent x_event;
-            XNextEvent(g_display, &x_event);
-            if (ProcessXEvent(&x_event, event))
-                return;
-        }
-
-        /* Next check if any timer has expired. */
-        size_t timer_id = Jtk_GetExpiredTimer();
-        if (timer_id != (size_t)-1)
-        {
-#if 0
-            auto it = g_key_repeat_timers.find(timer_id);
-            if (it != g_key_repeat_timers.end())
-            {
-                event->type = JTK_EVENT_KEY_PRESS;
-                event->key.repeat = true;
-                event->key.key = XKeyToJtkKey(it->second);
-                event->key.x_keycode = it->second;
-            }
-            else
-            {
-#endif
-                event->type = JTK_EVENT_TIMER;
-                event->timer.timer_id = timer_id;
-                event->timer.user1 = Jtk_GetTimerUserData(timer_id, 0u);
-                event->timer.user2 = Jtk_GetTimerUserData(timer_id, 1u);
-#if 0
-            }
-#endif
-            Jtk_ServiceTimer(timer_id);
             return;
-        }
 
-        /* Finally, wait for something to happen. */
+        /* Wait for something to happen. */
         uint64_t time_to_wait = Jtk_TimeToNextTimerExpiration();
         if (time_to_wait > MAX_WAIT_TIME)
         {

src/gui/jtk/Jtk_event.h

@@ -52,6 +52,7 @@ typedef struct
     };
 } Jtk_Event;
 
+bool Jtk_CheckEvent(Jtk_Event * event);
 void Jtk_WaitEvent(Jtk_Event * event);
 #if 0
 void Jtk_BeginKeyRepeat(Jtk_KeyEvent * key_event, uint32_t delay, uint32_t interval);