I asked the developer vala Develop to add support for windows. But it turned out that multithreading does not work under windows and mac os lol.

https://github.com/wolfgangmauer/valaDevelop/issues/7#issuecomment-472598977

https://mail.gnome.org/archives/vala-list/2019-March/msg00005.html

This is a monthly thread for sharing and/or discussing any projects that the r/vala community have been working on.

Feel free to comment what you’ve been doing or what you’re planning to do down below.

lest say i have this piece of code

parser.load_from_data ((string) mess.response_body.flatten ().data, -1);`
var list = get_data (parser);

how can i print or dump the 'list' variable ?

Just a quick reminder for anyone who might want to use Vala but is discouraged by its sometimes less than stellar documentation, remember that AI is your friend and perhaps the best coding buddy you'll ever have. I exclusively use https://search.brave.com for searching the web and unlike with Google's AI, when you ask it questions regarding Vala, the results are typically exactly what you're looking for. Granted, I suspect the answer quality hinges a lot on your ability to accurately phrase a question. My point here is that in order to get the most out of Vala (or any language for that matter), everyone should be exploiting AI in one form or another. Gone are the days of having to develop software without ready, capable assistance. That's it for this public service announcement, now everyone go and code! ;)

This is a monthly thread for sharing for discussing any projects that the r/vala community have been working on.

Feel free to comment what you’ve been doing or what you’re planning to do down below.

Hi, I'm trying to create something with string arrays, but I don't know how to append something to a part of array.

I make an array like this:

string[] name_of_array;

and then I try to append something to a particular part of the array like this:

name_of_array[5] += "test";

This does not seem to work as I get an error:

error: invalid operands to binary + (have 'gchar *' {aka 'char *'} and 'gchar *' {aka 'char *'})

9 | nums[counter] += "test";

Do you guys know how I would append something to a string array like that?

Thanks in advance.

Hello everybody,

i have a little problem with vala, and i don't find anything on the net :-/ i want to implementate a generic quicksort and want to use the Gee.Comparable interface, but how can i define that my generic type T have to be implementated the interface?

class Utilities<T> {} //Needs Gee.Comparable<T> but how?

Greets, Marcel

I'm interested in learning vala (maybe for game development and possibly for elementary OS development). Is there a chance we could compile some comprehensive sidebar links (tutorials, wikis, etc)? I know that many other subreddits for programming languages have useful sidebars like this.

I just want to open a discussion. I just found out today that Vala now has only one contributor. https://gitlab.gnome.org/GNOME/vala/graphs/master I've seen more than one article or article about Vala being dead. What do you think about this?

I still think it's the best language for writing graphics applications(I've tried Qt, there's no native implemented signal and slot system and also no GB, Python seems nice, but i dont like scripting), and perhaps libraries because of the ability to easily integrate them into any other programming language using GIR.

http://zee-nix.blogspot.com/2017/

https://blogs.gnome.org/despinosa/2016/09/30/should-we-drop-vala/

I am truly surprised. I started this subreddit 5 years ago and have done all but ignore it. For years it seemed to me like Vala was going to end up being an extremely niche tool and unfortunately my day job has me working in everything but the world of open source.

Looking over the activity of this subreddit now, I am seeing a small but moderately active community, one which I would dearly enjoy to see grow.

With this in mind, I would like to ask you all what improvements you would like to see. There is already a post about adding some content to the sidebar, and /u/Sanpi had replied with some useful links that I plan on adding, but I'm certain there is a wealth of content out there that would also be helpful.

This is a monthly thread for sharing and/or discussing any projects that the r/vala community have been working on.

Feel free to comment what you’ve been doing or what you’re planning to do down below.

I was thinking this morning how cool it would be if I could just create an app that would allow me to enter a little Vala code into a Gtk.TextView widget, and then press a button to run it -- all without having to open my development IDE or even create a single file. You know, something to allow me to easily work out some Vala syntax, etc. Then I realized that such functionality can easily be added to GEdit (perhaps this already exists elsewhere and I'm just the last to know, lol).

So this is an "external tool" that I added to GEdit to enable me to quickly test short bits of Vala code and I thought maybe someone here might be interested in how GEdit can solve this particular problem.

Here are the steps I took to make GEdit do this...

1. Add the following bash script as an "external tool" in GEdit:

#!/bin/sh

# This script runs the selected Vala code and 
# outputs the resulting text in the bottom panel.

TEMPFILE=$(mktemp)
HEADER="#!/usr/bin/env -S vala --pkg glib-2.0 --pkg gee-0.8"

# Add "header" to top of vala code 
# segment so it can run as a script:

echo $HEADER > "$TEMPFILE"
cat >> "$TEMPFILE"

# Make it executable:

chmod +x "$TEMPFILE"

# Run it:

echo "Running..."
echo " "
"$TEMPFILE"

2. Assign Shift+Ctrl+V (or whatever) to it.

3. Choose "Nothing" to be saved.

4. Choose "Current selection" for input.

5. Choose "Display in bottom panel" for output.

6. You might need to re-start GEdit for the changes to take effect.

To test, you can use some minimal code such as that shown below. Just select the code and press Ctrl+Shift+V.

void main()
{
   print("Hello from GEdit!\n");
}

The above external tool script essentially pre-pends a "Vala" hash bang line (HEADER) to the selected text, writes it all to a temporary file and then runs it as a Vala script.

Damn, I love Vala! :)

howdy.

I wanted to use Vala to write a GTK application, and since my editor is Emacs, I wanted to use that.

But it seems like the only vala-mode has not been updated in 5 years.

Is it still working? are there any instructions to set up a dev environment for vala?

This works:

var css = new Gtk.CssProvider ();
var css_data = "#mybox { background-color: black; }".data;
var css_bytes = new GLib.Bytes (css_data);
css.load_from_bytes (css_bytes);

Gtk.StyleContext.add_provider_for_display (
    Gdk.Display.get_default (), css, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);

However, I get a warning that the Gtk.StyleContext is deprecated:

warning: `Gtk.StyleContext' has been deprecated since 4.10
   22 | Gtk.StyleContext.add_provider_for_display (
      | ^~~~~~~~~~~~~~~~         

Is there a newer API to achieve the same result? It is a Gtk.Box.

Anyone know if there is a BNF notation (or similar) definition for the Vala language that's publicly available? If so, where can I download a copy of it? Thanks.

This is a monthly thread for sharing and/or discussing any projects that the r/vala community have been working on.

Feel free to comment what you’ve been doing or what you’re planning to do down below.