X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?p=xscreensaver;a=blobdiff_plain;f=driver%2Ftimers.c;h=1f4321425bcc07617aad44f4e025c3dcb4d721d6;hp=c9244f735e7655b29c8a968a7175d7885e364b78;hb=3f438031d610c7e15fd33876a879b97e290e05fb;hpb=447db08c956099b3b183886729108bf5b364c4b8

diff --git a/driver/timers.c b/driver/timers.c
index c9244f73..1f432142 100644
--- a/driver/timers.c
+++ b/driver/timers.c
@@ -386,11 +386,17 @@ pointer_moved_p (saver_screen_info *ssi, Bool mods_p)
       distance > 0)
     moved_p = True;
 
-  if (ssi->poll_mouse_last_root_x == -1 ||
-      ssi->poll_mouse_last_root_y == -1 ||
-      root_x == -1 ||
-      root_y == -1)
-    moved_p = True;
+  /* If the mouse is not on this screen but used to be, that's motion.
+     If the mouse was not on this screen, but is now, that's motion.
+   */
+  {
+    Bool on_screen_p  = (root_x != -1 && root_y != -1);
+    Bool was_on_screen_p = (ssi->poll_mouse_last_root_x != -1 &&
+                            ssi->poll_mouse_last_root_y != -1);
+
+    if (on_screen_p != was_on_screen_p)
+      moved_p = True;
+  }
 
   if (p->debug_p && (distance != 0 || moved_p))
     {
@@ -404,7 +410,7 @@ pointer_moved_p (saver_screen_info *ssi, Bool mods_p)
                  ssi->poll_mouse_last_root_y);
       fprintf (stderr, " -> ");
       if (root_x == -1)
-        fprintf (stderr, "off screen.");
+        fprintf (stderr, "off screen");
       else
         fprintf (stderr, "%d,%d", root_x, root_y);
       if (ssi->poll_mouse_last_root_x != -1 && root_x != -1)