misunderstanding about styles (FLTK 1.4/Linux/X11)

[Basile Starynkevitch]

Hello all,

I am a complete newbie about FLTK.

On Linux/Debian/bookworm/sid (x86-64) with X.Org version: 1.21.1.3 server

I compiled FLTK from its source code. FLTK git commit being 4618fa9053217f and using

'./configure'  '--with-abiversion' '--with-optim=-O2 -g' '--enable-debug' to configure FLTK.

libc is (Debian GLIBC 2.33-7)

GCC (so c++ or g++) is g++ (Debian 11.3.0-1)

My keyboard is French (AZERTY) so has a key labeled §  (shifted) or ! (unshifted).

My sample program  fltk-mini-edit.cc (to learn FLTK, it is GPLv3+ licensed), inspired by existing texteditor-with-dynamic-colors.cxx, is on github: https://github.com/bstarynk/misc-basile/blob/master/fltk-mini-edit.cc and I am referring to its git commit ee2a0dd

The build script to compile that sample program is also on github: https://github.com/bstarynk/misc-basile/blob/master/mini-edit-build.sh

That simple fltk-mini-edit is expected to show in red unicode characters like ° (or €; I have AltGr E key bound to that).

For some reason, it does not.

What am I doing wrong?

Basile Starynkevitch

92340 Bourg-la-Reine, France

bas...@starynkevitch.net

PS. My hope, if I am able to understand how to use FLTK, is to use it in the RefPerSys open source symbolic artificial intelligence system (inspired by books from Jacques Pitrat, .. I recommend reading some of them).

[Mo_Al_]

I've tried building your program on ubuntu and it shows this:

https://user-images.githubusercontent.com/37966791/165731174-31ecce07-97db-4560-83fd-6fedf8225773.png

So the characters appear correctly. Tried with both default build of FLTK and with --enable-pango (via configure).

Could it be a system fonts issue.

I've had to modify things to get the build working, changed `static constexpr` arrays style_table and stylename_table to `static inline` (guess my g++ version requires the explicit inline call, `static inline constexpr` also works).

[Mo_Al_]

If you mean the different color for unicode, it's because you pass a different array length to hightlight_data:

  highlight_data(stybuff, style_table,

                 (unsigned)Style__LAST-1,

                 'A', 0, 0);

Try:

  highlight_data(stybuff, style_table,

                 (unsigned)Style__LAST,

                 'A', 0, 0);

Which gives:

https://user-images.githubusercontent.com/37966791/165739564-9055c12a-912c-453e-ad29-aa0710c8c970.png

[Basile Starynkevitch]

On 4/28/22 12:30, Mo_Al_ wrote:

I've tried building your program on ubuntu and it shows this:

https://user-images.githubusercontent.com/37966791/165731174-31ecce07-97db-4560-83fd-6fedf8225773.png

I see the same on my computers.

So the characters appear correctly. Tried with both default build of FLTK and with --enable-pango (via configure).

Could it be a system fonts issue.

No, they don't.  https://github.com/bstarynk/misc-basile/blob/master/fltk-mini-edit.cc has (in commit ee2a0dd ...) at line 112

[Style_Unicode] = //

{ FL_DARK_RED, FL_HELVETICA_BOLD, 17, ATTR_BGCOLOR, FL_GRAY0 }, //:Style_Unicode,

And neither your picture nor my screen is showing anything in red. I was expecting the § sign to appear in red.

Thanks for your help.

I've had to modify things to get the build working, changed `static constexpr` arrays style_table and stylename_table to `static inline` (guess my g++ version requires the explicit inline call, `static inline constexpr` also works).

Thanks for the feedback. I just git pushed commit 0565f5f

Regards

--

Basile Starynkevitch                  <bas...@starynkevitch.net>
(only mine opinions / les opinions sont miennes uniquement)
92340 Bourg-la-Reine, France
web page: starynkevitch.net/Basile/

[Basile Starynkevitch]

A big thanks. Sorry for my stupid mistake. Did commit e77a443

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[Matthias Melcher]

bas...@starynkevitch.net schrieb am Mittwoch, 27. April 2022 um 20:44:14 UTC+2:

'./configure'  '--with-abiversion' '--with-optim=-O2 -g' '--enable-debug' to configure FLTK.

Not sure if this is a transcribing issue, but writing '--with-optim=-O2 -g' in single quotes, doesn't that present as '-O2 -g' as the optimising option, ignoring '-g' as a stand-alone option? Maybe I am just to picky or paranoid, but IMHO, there should be no quotes around the options. Having them around the filename is correct though in case the full path had a space character in it.