(struct scroll_bar): New member `redraw_needed_p'.

2 files changed, 12 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 1ec2ad7aa85..1c4b08d24d7 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,12 @@
+2008-01-21  YAMAMOTO Mitsuharu  <mituharu@math.s.chiba-u.ac.jp>
+
+        * macterm.c (x_scroll_bar_create): Initialize bar->redraw_needed_p.
+        (XTset_vertical_scroll_bar): Redraw scroll bar if bar->redraw_needed_p
+        is set even without positional changes.
+        (x_scroll_bar_clear): Set bar->redraw_needed_p.
+
+        * macterm.h (struct scroll_bar): New member `redraw_needed_p'.
+
 2008-01-19  Kenichi Handa  <handa@m17n.org>
 
         * coding.c (detect_coding_iso2022): New arg latin_extra_code_state.
diff --git a/src/macterm.h b/src/macterm.h
index e596a148dcd..69d987b0cdc 100644
--- a/src/macterm.h
+++ b/src/macterm.h
@@ -435,6 +435,9 @@ struct scroll_bar {
      being dragged, this is Qnil.  */
   Lisp_Object dragging;
 
+  /* t if redraw needed in the next XTset_vertical_scroll_bar call.  */
+  Lisp_Object redraw_needed_p;
+
 #ifdef USE_TOOLKIT_SCROLL_BARS
   /* The position and size of the scroll bar handle track area in
      pixels, relative to the frame.  */