Re: [Vala] Setting prefix and paths at configure time.

[Frederik <scumm_fredo gmx net>]

Federico Pelloni wrote:
> In my project I need to load some custom pixmaps that will be
> installed into $prefix/share/projectname/pixmaps, with $prefix being
> set at configure time. Classical situation for many applications. How
> can I make my program find that files?
> I'm using Waf to configure/build/install my application, and I can
> have created a config.h file with those paths defined, but I don't
> know how to access them within my .vala files.
> I saw some projects (Valaide for example) using a "Config" namespace
> or class, but I could not understand how it works.
> I'd be glad if someone could explain me which direction I've to go to
> solve this problem.
>
> Thank you.

You have to create a 'config.vapi' file as a bridge between Vala and
your 'config.h', which declares the constants you want to access in a
namespace. For example:

-----
[CCode (cprefix = "", lower_case_cprefix = "", cheader_filename = 
"config.h")]
namespace Config {
        public const string GETTEXT_PACKAGE;
        public const string PACKAGE_DATADIR;
        public const string LOCALE_DIR;
        public const string THEME_DIR;
        public const string PACKAGE_NAME;
        public const string PACKAGE_VERSION;
        public const string PACKAGE;
        public const string VERSION;
}
-----

Then you can use this vapi file by passing '--pkg config' to valac.
Don't forget to tell valac via '--vapidir' where to search for this
file.

Regards,

Frederik