* xterm.c (x_initialize): Don't install Xt event timer here.

	(x_timeout_atimer_activated_flag): New var.
	(x_activate_timeout_atimer): New function to install Xt timer.
	(x_send_scroll_bar_event, x_process_timeouts): Use it.

	* xmenu.c (x_menu_set_in_use, popup_activate_callback)
	(create_and_show_popup_menu, create_and_show_dialog): Use it.

	* xterm.h (x_activate_timeout_atimer): prototype.

4 files changed, 58 insertions, 13 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index f2125895c2c..4f026bac9b9 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,15 @@
+2006-09-13  YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
+
+        * xterm.c (x_initialize): Don't install Xt event timer here.
+        (x_timeout_atimer_activated_flag): New var.
+        (x_activate_timeout_atimer): New function to install Xt timer.
+        (x_send_scroll_bar_event, x_process_timeouts): Use it.
+
+        * xmenu.c (x_menu_set_in_use, popup_activate_callback)
+        (create_and_show_popup_menu, create_and_show_dialog): Use it.
+
+        * xterm.h (x_activate_timeout_atimer): prototype.
+
 2006-09-13  Richard Stallman  <rms@gnu.org>
 
         * print.c (print_string): When printcharfun is t,
diff --git a/src/xmenu.c b/src/xmenu.c
index 574240a4560..63dfb5102bd 100644
--- a/src/xmenu.c
+++ b/src/xmenu.c
@@ -1182,6 +1182,10 @@ x_menu_set_in_use (in_use)
 {
   menu_items_inuse = in_use ? Qt : Qnil;
   popup_activated_flag = in_use;
+#ifdef USE_X_TOOLKIT
+  if (popup_activated_flag)
+    x_activate_timeout_atimer ();
+#endif
 }
 
 /* Wait for an X event to arrive or for a timer to expire.  */
@@ -1498,6 +1502,9 @@ popup_activate_callback (widget, id, client_data)
      XtPointer client_data;
 {
   popup_activated_flag = 1;
+#ifdef USE_X_TOOLKIT
+  x_activate_timeout_atimer ();
+#endif
 }
 #endif
 
@@ -2798,6 +2805,7 @@ create_and_show_popup_menu (f, first_wv, x, y, for_click)
   /* Display the menu.  */
   lw_popup_menu (menu, (XEvent *) &dummy);
   popup_activated_flag = 1;
+  x_activate_timeout_atimer ();
 
   {
     int fact = 4 * sizeof (LWLIB_ID);
@@ -3175,6 +3183,7 @@ create_and_show_dialog (f, first_wv)
   /* Display the dialog box.  */
   lw_pop_up_all_widgets (dialog_id);
   popup_activated_flag = 1;
+  x_activate_timeout_atimer ();
 
   /* Process events that apply to the dialog box.
      Also handle timers.  */
diff --git a/src/xterm.c b/src/xterm.c
index e7a462aef58..9858d55f4d5 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -4091,6 +4091,9 @@ x_send_scroll_bar_event (window, part, portion, whole)
 
   /* Make Xt timeouts work while the scroll bar is active.  */
   toolkit_scroll_bar_interaction = 1;
+#ifdef USE_X_TOOLKIT
+  x_activate_timeout_atimer ();
+#endif
 
   /* Setting the event mask to zero means that the message will
      be sent to the client that created the window, and if that
@@ -10134,6 +10137,11 @@ static XrmOptionDescRec emacs_options[] = {
   {"-mc",       "*pointerColor", XrmoptionSepArg, (XtPointer) NULL},
   {"-cr",       "*cursorColor", XrmoptionSepArg, (XtPointer) NULL}
 };
+
+/* Whether atimer for Xt timeouts is activated or not.  */
+
+static int x_timeout_atimer_activated_flag;
+
 #endif /* USE_X_TOOLKIT */
 
 static int x_initialized;
@@ -10815,13 +10823,39 @@ static void
 x_process_timeouts (timer)
      struct atimer *timer;
 {
+  BLOCK_INPUT;
+  x_timeout_atimer_activated_flag = 0;
   if (toolkit_scroll_bar_interaction || popup_activated ())
     {
-      BLOCK_INPUT;
       while (XtAppPending (Xt_app_con) & XtIMTimer)
         XtAppProcessEvent (Xt_app_con, XtIMTimer);
-      UNBLOCK_INPUT;
+      /* Reactivate the atimer for next time.  */
+      x_activate_timeout_atimer ();
+    }
+  UNBLOCK_INPUT;
+}
+
+/* Install an asynchronous timer that processes Xt timeout events
+   every 0.1s as long as either `toolkit_scroll_bar_interaction' or
+   `popup_activated_flag' (in xmenu.c) is set.  Make sure to call this
+   function whenever these variables are set.  This is necessary
+   because some widget sets use timeouts internally, for example the
+   LessTif menu bar, or the Xaw3d scroll bar.  When Xt timeouts aren't
+   processed, these widgets don't behave normally.  */
+
+void
+x_activate_timeout_atimer ()
+{
+  BLOCK_INPUT;
+  if (!x_timeout_atimer_activated_flag)
+    {
+      EMACS_TIME interval;
+
+      EMACS_SET_SECS_USECS (interval, 0, 100000);
+      start_atimer (ATIMER_RELATIVE, interval, x_process_timeouts, 0);
+      x_timeout_atimer_activated_flag = 1;
     }
+  UNBLOCK_INPUT;
 }
 
 #endif /* USE_X_TOOLKIT */
@@ -10927,17 +10961,6 @@ x_initialize ()
                          XtCacheByDisplay, cvt_pixel_dtor);
 
   XtAppSetFallbackResources (Xt_app_con, Xt_default_resources);
-
-  /* Install an asynchronous timer that processes Xt timeout events
-     every 0.1s.  This is necessary because some widget sets use
-     timeouts internally, for example the LessTif menu bar, or the
-     Xaw3d scroll bar.  When Xt timouts aren't processed, these
-     widgets don't behave normally.  */
-  {
-    EMACS_TIME interval;
-    EMACS_SET_SECS_USECS (interval, 0, 100000);
-    start_atimer (ATIMER_CONTINUOUS, interval, x_process_timeouts, 0);
-  }
 #endif
 
 #ifdef USE_TOOLKIT_SCROLL_BARS
diff --git a/src/xterm.h b/src/xterm.h
index 9aa1d8fcacb..94ae9472200 100644
--- a/src/xterm.h
+++ b/src/xterm.h
@@ -1001,6 +1001,7 @@ extern XtAppContext Xt_app_con;
 extern int x_alloc_lighter_color_for_widget __P ((Widget, Display*, Colormap,
                                                   unsigned long *,
                                                   double, int));
+extern void x_activate_timeout_atimer P_ ((void));
 #endif
 extern void x_query_colors P_ ((struct frame *f, XColor *, int));
 extern void x_query_color P_ ((struct frame *f, XColor *));