From: H.G. Muller <h.g.muller@hccnet.nl>
Date: Tue, 19 Mar 2013 12:20:24 +0000 (+0100)
Subject: Fix scrolling of Chat Box
X-Git-Url: http://winboard.nl/cgi-bin?a=commitdiff_plain;h=0290d2bc845bbd6445d22176ceb88ca5a7dc3422;p=xboard.git

Fix scrolling of Chat Box

Seems the problem is that scroll_to_iter does not work until after some time,
needed to calculate line heights. Use scroll_to_mark instead, after clumsily
adding a text_mark.
---

diff --git a/gtk/xoptions.c b/gtk/xoptions.c
index 0eb1658..7a03ffb 100644
--- a/gtk/xoptions.c
+++ b/gtk/xoptions.c
@@ -317,8 +317,13 @@ void
 ScrollToCursor (Option *opt, int caretPos)
 {
     static GtkTextIter iter;
+    static GtkTextMark *mark;
+    if(!mark) mark = gtk_text_mark_new(NULL, 0);
     gtk_text_buffer_get_iter_at_offset((GtkTextBuffer *) opt->handle, &iter, caretPos);
-    gtk_text_view_scroll_to_iter((GtkTextView *) opt->textValue, &iter, 0.0, 0, 0.5, 0.5);
+    gtk_text_buffer_add_mark((GtkTextBuffer *) opt->handle, mark, &iter);
+    gtk_text_view_scroll_to_mark((GtkTextView *) opt->textValue, mark, 0.0, 0, 0.5, 0.5);
+//    gtk_text_view_scroll_to_iter((GtkTextView *) opt->textValue, &iter, 0.0, 0, 0.5, 0.5);
+    gtk_text_buffer_delete_mark((GtkTextBuffer *) opt->handle, mark);
 }
 
 int