[dia] text: improve cursor positioning via mouse

[Hans Breuer <hans src gnome org>]

commit 09985069ec609412af3f21e2c2c5995ec3df772a
Author: Hans Breuer <hans breuer org>
Date:   Mon Sep 22 23:48:07 2014 +0200

    text: improve cursor positioning via mouse
    
    the click had to be completely after the glyph, now the right half
    of the glyph is enough

 lib/text.c |   21 +++++++++++++--------
 1 files changed, 13 insertions(+), 8 deletions(-)
---
diff --git a/lib/text.c b/lib/text.c
index 4660308..050189f 100644
--- a/lib/text.c
+++ b/lib/text.c
@@ -708,14 +708,19 @@ text_set_cursor(Text *text, Point *clicked_point,
 
     /* Do an ugly linear search for the cursor index:
        TODO: Change to binary search */
-  
-    for (i=0;i<=text_get_line_strlen(text, row);i++) {
-      str_width_first =
-       DIA_RENDERER_GET_CLASS(renderer)->get_text_width(renderer, text_get_line(text, row), i);
-      if (clicked_point->x - start_x >= str_width_first) {
-       text->cursor_pos = i;
-      } else {
-       return;
+    {
+      real min_dist = G_MAXDOUBLE;
+      for (i=0;i<=text_get_line_strlen(text, row);i++) {
+       real dist;
+       str_width_first =
+         DIA_RENDERER_GET_CLASS(renderer)->get_text_width(renderer, text_get_line(text, row), i);
+       dist = fabs(clicked_point->x - (start_x + str_width_first));
+       if (dist < min_dist) {
+         min_dist = dist;
+         text->cursor_pos = i;
+       } else {
+         return;
+       }
       }
     }
     text->cursor_pos = text_get_line_strlen(text, row);