wxWidgets terminal again

[<tim...@en...>]

Dear gnuplot enthusiasts,

I have updated the wxWidgets terminal hosted in gnuplot's developpement=20
pages :

http://sourceforge.net/tracker/index.php?func=3Ddetail&aid=3D1267434&grou=
p_id=3D2055&atid=3D302055

As discussed previously on this list, I now use pango and cairo for the=20
drawing code. I have begun in this version to separate wxWidgets and=20
cairo/pango codes, so that they can be treated specifically. Indeed, as=20
cairo is designed to fully support ps, pdf, png, etc. in future=20
releases, it can be interesting for gnuplot file terminals.

Using pango helped me to handle text layouts properly. I am pretty happy=20
with alignment, even in enhanced text mode. I have implemented text=20
encoding and now you can also use 'set term wxt...' to set your font=20
name and size, as with most other terminals.

There's a caveat unfortunately : pango is based on unicode, and thus=20
won't use fonts that have a mapping different from unicode. It is the=20
case of the Symbol font, where for example the character code 0x41 gives=20
'alpha' whereas unicode mapping asks for a 'a'. For the Symbol font=20
especially, I have implemented a translation step from the Symbol=20
character to its unicode counterpart with the help of the following page =
:
http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/SYMBOL.TXT
I hope this solution will be good enough.

This version compiles under Windows with makefile.mgw
Since the first announce of a working code under Windows, I have managed=20
to get mouse interactivity. Compared to the default Windows terminal,=20
the wxWidgets terminal provides enhanced text mode, multiple plot=20
windows, and antialiased lines.
Yau can get a binary here :

http://tipote.free.fr/wgnuplot-wxt-20051210.zip

Here are screenshots :

http://tipote.free.fr/wxt-windows3.png       (under Windows)
http://tipote.free.fr/wxt15.png       (under Linux)

[Today I have problems to reach this files. It must be a temporary=20
problem of free.fr]

Please note that the patch no longer modifies any of gnuplot files,=20
apart from term.h to add the terminal, readline.c to add mouse support=20
under Windows, configure.in and makefile.mgw to make it compile, so it=20
consider it safe regarding other gnuplot functionnalities.

I now look forward for your advice. Do you think this patch has some=20
future or should I forget it to come back to my physics' courses ? What=20
can I do to get this included in gnuplot CVS one day ? What do you think=20
of cairo as an alternative to libgd, libpdf and no-postscript-lib-at-all =
?

Best regards,

Timoth=E9e Lecomte