Re: Treat TeX in plot text in a Matlab compatible matter with gnuplot enhanced mode

[John W. Eaton]

On 19-Nov-2007, David Bateman wrote:

| Shai Ayal wrote:
| > I have 2 comments:
| > 1) It's going to be really hard to live up to the features of the
| > gnuplot backend, and it keeps getting harder.
| > 2) Why do you use the string_property type for the interpreter
| > property and not radio_value?
| >   
| Shai,
| 
| Here is my updated version of this patch. It adds the \bf, \it modes
| etc, fixes a few incorrect symbols and correctly implements the super-
| and sub-scripts. The super- and sub-scripts were rather messy as gnuplot
| requires that the shorter of the two comes first to get the correct
| alignment. The definition of shorter is not obvious as the fonts might
| be proportional, nested {} and  there might be  non-printed characters
| like /fontsize{20} that need to be ignored.. I also added documentation
| and an example
| 
| x = 0:0.01:3;
| plot(x,erf(x));
| hold on;
| plot(x,x,'r');
| axis([0, 3, 0, 1]);
| text(0.65, 0.6175, strcat('\leftarrow x = {2/\surd\pi', ...
| ' {\fontsize{16}\int_{\fontsize{8}0}^{\fontsize{8}x}}', ...
| ' e^{-t^2} dt} = 0.6175'))
| 
| which demonstrates the capabilities of the patch to layout mathematical
| formula. I included your string_property, caseless_str patch in this
| patch to get rid of he conflict between our patches. So your patch
| shouldn't be applied, as its included here..

| 2007-11-19  David Bateman  <address@hidden>
| 
|       * plot/drawnow.m (open_gnuplot_stream, init_gnuplot_stream):
|       Return whether the terminal supports enhanced text or not.
|       (drawnow:enhanced_term): New sub-function to determine is terminal
|       supported enhanced mode.
|       * plot/__go_draw_figure__.m: Accept enhanced flag and pass to
|       __go_draw_axes__.
|       * plot/__go_draw_axes__.m: Accept enhanced flag and munge text if
|       needed to support the enhanced mode.
|       * plot/print.m: Remove "enhanced" option as this is now treated in
|       drawnow.m.
| 
| 2007-11-19  David Bateman  <address@hidden>
| 
|       * graphics.h.in (class figure): Add __enhanced__ property to cache
|       whether the terminal supports enhanced mode. Add interpreter
|       property to all text classes, to determine the renderer for the
|       text.
|       * graphics.cc (class figure): ditto.
| 
| 2007-11-19  Shai Ayal  <address@hidden>
| 
|       * graphics.cc (string_properties): delete class 
|       (property_name): rename class to caseless_str. 
|       (radio_values::possible_vals): change type to caseless_str.
| 
| 2007-11-19  David Bateman  <address@hidden>
| 
|       * interpreter/plot.txi: Document the new text properties and the
|       TeX interpreter mode of text objects.
|       * interpreter/plotimages.m: Add an example for the TeX
|       interpreter.
|       * interpreter/Makefile.in (PLOTIMAGES): Add the TeX example
| 
| 2007-11-19  David Bateman  <address@hidden>
| 
|       * NEWS: Document the TeX interpreter mode and its limitations with
|       gnuplot 4.0.

I haven't tried this patch yet, but from reading it, it appears that
it converts TeX commands for special characters to "/Symbol X" even
for the (e)pslatex terminal.  I'm not sure that is best.  I think I
would expect the TeX commands to be rendered by TeX in that case
instead of being converted to PostScript symbols.

Also, I noticed two instances of \Symbol instead of /Symbol.  Is that
intentional?

Thanks,

jwe