wxWidgets terminal : new round

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

Hello !

I am happy to provide an updated patch for the wxWidgets terminal, which =
goes, as
usually, a little further !

The patch on sourceforge :
http://sourceforge.net/tracker/index.php?func=3Ddetail&aid=3D1267434&grou=
p_id=3D2055&atid=3D302055
Some screenshots :
http://tipote.free.fr/wxt12.png
http://tipote.free.fr/wxt13.png
http://tipote.free.fr/wxt14.png

Changes in this patch :
* rendering is done offscreen via the cairo library. This gives to the us=
er really good-looking plots thanks to line antialiasing !
And it gives me a more consistent drawing library... Of course, you need =
to have cairo installed.
It may seem another overhead, but in fact cairo is needed by gtk>2.8.

* No longer use the readline thread, do all gnuplot<->term communication =
via _waitforinput.
It avoids to modify core gnuplot files, the main loop is no longer affect=
ed.
The patch is now completely safe as far as other terminals are concerned.

* implement 'pause mouse'
( not very exciting : * implement 'suspend' )

Bug fixing :
* should compile cleanly with a unicode-enabled wxwidgets library
* reworked pattern/solid fill, much consistent

What is remaining in my 'todo' list ? The following :
* I plan to use the pango library to manage text. As you will see, cairo =
draws text almost correctly (symbol font is working - in
particular), but there are still some alignement problems. Pango will giv=
e solid functions to calculate complete text extents.
The pango dependency is not a problem under unix, as wxwidgets already de=
pends on gtk, which depends on pango and cairo.
* I have still not tested under Windows.
* clipboard bug (two plots in clipboard) remains

I hope you will enjoy these changes and I will be pleased to have your ad=
vice.

Best regards,
Timoth=E9e Lecomte