[Gnuplot-bugs] a suggestion

[Igor B. <I....@mu...>]

Hi, I've been using gnuplot for over a decade and contributed error
bars for polar plots. One issue that has always annoyed me is that I
could not vary the size of the key title box with the "spacing"
command. I often have subscripts and superscripts in the key titles
which get the box lines go through them. Accordingly, I have been
modifying the graphics.c file in the way that is listed below. I had
hoped that the latest version of gnuplot would give me the required
capacity, but I don't believe it does. If others see value in what I
have done perhaps this could be remedied in a future version. An
independent determination of the key title height would be ideal. The
following uses "spacing".

Thanks,

Igor

-- 
---------------------------------------------------------------------
Igor Bray, ARC Australian Professorial Fellow,                _--_|\ 
Physics and Energy Studies,                                  /      \
School of Engineering Science,                               *_.--._/
Murdoch University,             phone(fax): +61 8 9360 6443(6183)  v
90 South Street, Murdoch,       mailto:I....@mu...           
Perth, Western Australia, 6150  http://atom.murdoch.edu.au/
---------------------------------------------------------------------

~/gnuplot-3.7.1> diff graphics.c graphics.c~
*** graphics.c  Tue Feb  5 11:00:51 2002
--- graphics.c~ Wed Sep 15 23:30:29 1999
***************
*** 1050,1054 ****
      /*{{{  calculate the window in the grid for the key */
-       /* Igor Bray modified the code to ensure the key title was the
-          same height as the key entries. This was done by replacing 
-            "t->v_char" with "key_entry_height" in a number of places */
      if (lkey == 1 || (lkey == -1 && key_vpos != TUNDER)) {
--- 1050,1051 ----
***************
*** 1057,1060 ****
        key_w = key_col_wth * key_cols;
!       /*      key_h = (ktitl_lines) * t->v_char + key_rows * key_entry_height;*/
!         key_h = (ktitl_lines) * key_entry_height + key_rows * key_entry_height;
        if (lkey == -1) {
--- 1054,1056 ----
        key_w = key_col_wth * key_cols;
!       key_h = (ktitl_lines) * t->v_char + key_rows * key_entry_height;
        if (lkey == -1) {
***************
*** 1750,1752 ****
            s = ss;
!           yl -= key_entry_height/2; /*t->v_char/2; Igor fixing key title height*/
            while ((e = (char *) strchr(s, '\n')) != NULL) {
--- 1746,1748 ----
            s = ss;
!           yl -= t->v_char / 2;
            while ((e = (char *) strchr(s, '\n')) != NULL) {
***************
*** 1766,1770 ****
                s = ++e;
!               yl -= key_entry_height; /*t->v_char;Igor fixing key title height*/
            }
!           yl += key_entry_height/2; /*t->v_char/2;Igor fixing key title height*/
            free(ss);
--- 1762,1766 ----
                s = ++e;
!               yl -= t->v_char;
            }
!           yl += t->v_char / 2;
            free(ss);
***************
*** 1783,1788 ****
     and first entry                          *//* JFi */
!             /*            (*t->move) (key_xl, key_yt - (ktitl_lines) * t->v_char);    JFi */
!             /*            (*t->vector) (key_xr, key_yt - (ktitl_lines) * t->v_char);  JFi */
!                       (*t->move)  (key_xl,key_yt - (ktitl_lines) * key_entry_height); /* Igor fixing key title height */
!                       (*t->vector)(key_xr,key_yt - (ktitl_lines) * key_entry_height); /* Igor fixing key title height */
        }
--- 1779,1782 ----
     and first entry                          *//* JFi */
!           (*t->move) (key_xl, key_yt - (ktitl_lines) * t->v_char);    /* JFi */
!           (*t->vector) (key_xr, key_yt - (ktitl_lines) * t->v_char);  /* JFi */
        }