developer toolbox

http://live.gnome.org/Vala/GTKSample

http://github.com/danlucraft/valar

== DESCRIPTION:

 * Write Ruby extensions in Vala. 
 * Automatically generate Ruby bindings for them.
 * Embed a Ruby interpreter into Vala.

Includes a VAPI file for calling the Ruby C API from Vala, and a 
code generator valar to introspect on a Vala library and automatically
generate bindings for Ruby.

Other features:

 * automated conversions between Vala and Ruby types
 * An object oriented Ruby API. Instead of RSTRING_PTR(str), 
   you write str.to_vala()
 * Ruby types. So instead of VALUE, VALUE, VALUE, you 
   write Ruby.Value, Ruby.Array, Ruby.String and enjoy automatically
   generated type checking to rule out segfaults.
 * Automated memory management, linked to the Ruby garbage collector.

unity ubuntu je napisan vala-i

http://trac.yorba.org/browser/valencia

http://www.wikivs.com/wiki/GTK_vs_Qt

GTK+ applications can also be developed with Vala, an object oriented programming language similar to C#, specially designed for the GObject type system. Vala programs compile to C code, without imposing any additional runtime requirements and without using a different ABI compared to applications and libraries written in C.

http://trac.yorba.org/browser/shotwell/trunk

http://blogs.gnome.org/juergbi/2009/09/18/closures-and-asynchronous-methods-in-vala/

bringout@nvostro-hernad:~/vala$ cat c.vala

void main (string[] args) {
    Gtk.init (ref args);

    var window = new Gtk.Window (Gtk.WindowType.TOPLEVEL);
    window.set_default_size (300, 50);
    window.destroy.connect (Gtk.main_quit);

    var button = new Gtk.Button.with_label ("Click me!");
    button.clicked.connect (() => {
        window.title = "Closures in Vala";
    });

    window.add (button);
    window.show_all ();

    Gtk.main ();
}

bringout@nvostro-hernad:~/vala$ valac --thread --pkg gdk-2.0 --pkg gtk+-2.0 c.vala

probao i async primjer na isti način.

interesantna je elegantna integracija sa dbus-om:

Async methods in Vala can also be used to implement D-Bus servers that can process multiple requests at the same time. Using it couldn’t be easier, just write an async method such as the above example, add it to a class annotated with [DBus (name = "org.example.Test")]

evo ovdje odmah d-bus server i client u vala:

http://blogs.gnome.org/juergbi/2010/06/20/gdbus-gvariant-gtk-3-and-vala/

http://www.micahcarrick.com/gtk-glade-tutorial-part-1.html

http://www.cs.ucla.edu/classes/spring10/cs131/hw/hw6.html

http://www.mengu.net/post/vala-programming-language

http://valadoc.org/

http://bec-systems.com/site/277/using-the-vala-programming-language-in-embedded-systems

http://askubuntu.com/questions/3306/which-ide-should-i-use-for-vala

http://broadcast.oreilly.com/2010/08/vale-java-scala-vala-palava.html

Vala is based on GNOME's GObject system, and provides the kind of class features you would expect. Like Scala it has a language-level equivalent to Java Beans get*() and set*() properties, but it also has language-level support for property change notifications and listeners. It does not have a strong XML story, just a mini parser, but it does seem to have a good Unicode story (strings are UTF-8, the string.getch() returns a unichar 16-bit character.) Probably its main difference with Java at a feature level is that that it has a reference-counting system for object de-allocation, which gives more deterministic real-time behaviour compared to Java's GC but opens the dooor to some programming errors. The other oddity, in this age, is that it does not do boundary checking on array accesses: so a little more discipline is required than Java (but presumably a lot less than in C).

I would expect that anyone who would be considering writing a new C or C++ application or who were C, C++, C# or disgruntled Java programmers wanting to avoid the clutches of the large corporations, and with a pretty strong and proven (OS-neutral?) platform behind it (i.e. the might of GNOME) might be interested in Vala. Like Scala, I think you would want to check whether the IDE support was adequate before launching onto a big project, of course.

http://live.gnome.org/Vala/PostgreSQL

http://live.gnome.org/Vala/ValaForJavaProgrammers

http://live.gnome.org/Vala/ValaForCSharpProgrammers

u path dodao c:\vala\bin, c:\valide\bin i valide radi

testirao gornji c.vala i to radi.

takođe radi i valide. valide zauzima svega 17MB RAM-a.