[Caml-list] lablgtk with OCamlMakefile

[Caml-list] lablgtk with OCamlMakefile

[Oliver Bandel]

Hello,

how can I convince OCamlMakefile to add the needed gtkInit-file to my program?

I tried around alot of things, looked up old answers on this list and  
at other places too,
also asked on irc.

No solution found.

Is it possible to solve this problem?
If so: how?


Ciao,
   Oliver

Re: [Caml-list] lablgtk with OCamlMakefile

[Markus Mottl]

You may want to try the following:

  PACKS = lablgtk2.auto-init

Regards,
Markus

On Tue, Jul 22, 2014 at 7:45 PM, Oliver Bandel
<oliver@first.in-berlin.de> wrote:
> Hello,
>
> how can I convince OCamlMakefile to add the needed gtkInit-file to my
> program?
>
> I tried around alot of things, looked up old answers on this list and at
> other places too,
> also asked on irc.
>
> No solution found.
>
> Is it possible to solve this problem?
> If so: how?
>
>
> Ciao,
>   Oliver
>
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa.inria.fr/sympa/arc/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs



-- 
Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com

Re: [Caml-list] lablgtk with OCamlMakefile

[Oliver Bandel]

Hi Markus,

thanks so much!

This works :)

You made my day...
..well the _next day_ also ;-)

I can now start to do my stuff :-)

   ( "now": after getting some sleep => _next day_ yields results )


Best Regards,
          Oliver



Zitat von Markus Mottl <markus.mottl@gmail.com> (Tue, 22 Jul 2014  
20:01:28 -0400)

> You may want to try the following:
>
>   PACKS = lablgtk2.auto-init
>
> Regards,
> Markus
>
> On Tue, Jul 22, 2014 at 7:45 PM, Oliver Bandel
> <oliver@first.in-berlin.de> wrote:
>> Hello,
>>
>> how can I convince OCamlMakefile to add the needed gtkInit-file to my
>> program?
>>
>> I tried around alot of things, looked up old answers on this list and at
>> other places too,
>> also asked on irc.
>>
>> No solution found.
>>
>> Is it possible to solve this problem?
>> If so: how?
>>
>>
>> Ciao,
>>   Oliver
>>
>>
>> --
>> Caml-list mailing list.  Subscription management and archives:
>> https://sympa.inria.fr/sympa/arc/caml-list
>> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
>> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
>
>
> --
> Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa.inria.fr/sympa/arc/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs

Re: [Caml-list] lablgtk with OCamlMakefile

[Adrien Nader]

Hi,

On Tue, Jul 22, 2014, Markus Mottl wrote:
> You may want to try the following:
> 
>   PACKS = lablgtk2.auto-init

Please, do not use the auto-init subpackage. It only exists for the
toplevel.

Godi had it in its default META and it prevented building the "conf"
packages without X available because running anything always tried to
initialize GTK+.

The README explains what to call to do the GTK+ initialization at the
right moment.

-- 
Adrien Nader

Re: [Caml-list] lablgtk with OCamlMakefile

[Oliver Bandel]

Hello Adrien,


thank you for adding this correction.

Using Markus' hint did work.

But I now changed my setup  in the following way:


I again use  "lablgtk2" (instead of "lablgtk2.auto-init")
in the "PACKS"-section of my Makefile.

And I added the line

   let locale = GtkMain.Main.init () in

as first line in my GUI-code.


Doing it this way, it also works; I get a GUI instead of a crash.

I hope this is the correct and recommended way now.

Remark on the README-file:

The line with "GtkMain.Main.init ()" I found in the
README of lablgtk, which you seemed to refer to.

Normally this README is not seen, because when installing
the lablgtk-package, it will just be the working code become installed,
and the README does not show up.

Possibly it makes sense to have doc-packages, which install
the documentation also.
(It's on Arch-linux, and no docs are installed by default.)


Thanks a lot,
        Oliver










Zitat von Adrien Nader <adrien@notk.org> (Wed, 23 Jul 2014 13:10:34 +0200)

> Hi,
>
> On Tue, Jul 22, 2014, Markus Mottl wrote:
>> You may want to try the following:
>>
>>   PACKS = lablgtk2.auto-init
>
> Please, do not use the auto-init subpackage. It only exists for the
> toplevel.
>
> Godi had it in its default META and it prevented building the "conf"
> packages without X available because running anything always tried to
> initialize GTK+.
>
> The README explains what to call to do the GTK+ initialization at the
> right moment.
>
> --
> Adrien Nader
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa.inria.fr/sympa/arc/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs

Re: [Caml-list] lablgtk with OCamlMakefile

[Markus Mottl]

I don't use GTK so I'm not sure what the recommended way of
initializing it is these days.  A long time ago it did require linking
with an extra initialization module for applications.  Using the
init-function above seems to work, too, and may be the best approach.

Regards,
Markus

On Wed, Jul 23, 2014 at 7:42 AM, Oliver Bandel
<oliver@first.in-berlin.de> wrote:
> Hello Adrien,
>
>
> thank you for adding this correction.
>
> Using Markus' hint did work.
>
> But I now changed my setup  in the following way:
>
>
> I again use  "lablgtk2" (instead of "lablgtk2.auto-init")
> in the "PACKS"-section of my Makefile.
>
> And I added the line
>
>   let locale = GtkMain.Main.init () in
>
> as first line in my GUI-code.
>
>
> Doing it this way, it also works; I get a GUI instead of a crash.
>
> I hope this is the correct and recommended way now.
>
> Remark on the README-file:
>
> The line with "GtkMain.Main.init ()" I found in the
> README of lablgtk, which you seemed to refer to.
>
> Normally this README is not seen, because when installing
> the lablgtk-package, it will just be the working code become installed,
> and the README does not show up.
>
> Possibly it makes sense to have doc-packages, which install
> the documentation also.
> (It's on Arch-linux, and no docs are installed by default.)
>
>
> Thanks a lot,
>        Oliver
>
>
>
>
>
>
>
>
>
>
> Zitat von Adrien Nader <adrien@notk.org> (Wed, 23 Jul 2014 13:10:34 +0200)
>
>> Hi,
>>
>> On Tue, Jul 22, 2014, Markus Mottl wrote:
>>>
>>> You may want to try the following:
>>>
>>>   PACKS = lablgtk2.auto-init
>>
>>
>> Please, do not use the auto-init subpackage. It only exists for the
>> toplevel.
>>
>> Godi had it in its default META and it prevented building the "conf"
>> packages without X available because running anything always tried to
>> initialize GTK+.
>>
>> The README explains what to call to do the GTK+ initialization at the
>> right moment.
>>
>> --
>> Adrien Nader
>>
>> --
>> Caml-list mailing list.  Subscription management and archives:
>> https://sympa.inria.fr/sympa/arc/caml-list
>> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
>> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
>
>
>
>
> --
> Caml-list mailing list.  Subscription management and archives:
> https://sympa.inria.fr/sympa/arc/caml-list
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs



-- 
Markus Mottl        http://www.ocaml.info        markus.mottl@gmail.com

Re: [Caml-list] lablgtk with OCamlMakefile

[Adrien Nader]

On Wed, Jul 23, 2014, Markus Mottl wrote:
> I don't use GTK so I'm not sure what the recommended way of
> initializing it is these days.  A long time ago it did require linking
> with an extra initialization module for applications.  Using the
> init-function above seems to work, too, and may be the best approach.

I'm not sure it ever required it but some distributions definitely did
that.
And by the way, the best example against this is with "--help": if the
program is linked against gtkInit.cmo, it won't be possible to use its
"--help" outside of X (just in case some people were still thinking of
doing it :) ).

-- 
Adrien Nader

Re: [Caml-list] lablgtk with OCamlMakefile

[Adrien Nader]

On Wed, Jul 23, 2014, Oliver Bandel wrote:
> I again use  "lablgtk2" (instead of "lablgtk2.auto-init")
> in the "PACKS"-section of my Makefile.
> 
> And I added the line
> 
>   let locale = GtkMain.Main.init () in
> 
> as first line in my GUI-code.
> 
> 
> Doing it this way, it also works; I get a GUI instead of a crash.
> 
> I hope this is the correct and recommended way now.

Yes, it's perfect. Just for completeness for archives: this changes very
slightly when multi-threading is required (and also remember that
graphics-related operations can only happen in the main thread on
most platforms but X11 (Wayland too?) and that even in that case, the
GDK lock must be taken before issuing them.
(more details are easily found on the internet)

> Remark on the README-file:
> 
> The line with "GtkMain.Main.init ()" I found in the
> README of lablgtk, which you seemed to refer to.
> 
> Normally this README is not seen, because when installing
> the lablgtk-package, it will just be the working code become installed,
> and the README does not show up.
> 
> Possibly it makes sense to have doc-packages, which install
> the documentation also.
> (It's on Arch-linux, and no docs are installed by default.)

Yes, right. There's
http://lablgtk.forge.ocamlcore.org/README.html#_how_to_compile_and_link
which should be more visible but still not as well as it should.

I've been unable to keep up with my TODO list in the recent months but
I'll soon have 2 * 4 hours of plane so I'll try to use that to commit
improvements to the documentation and beginner material. Unfortunately,
until then I won't have time to make such changes.

-- 
Adrien Nader