How to receive messages from other thread in GTK?

[qarmin (Rafał Mikrut)]

Hi,
I’m using GTK-rs and I want to send data(2xu32 and 2xu8 values) from another thread to be drawn in main thread GTK(in ProgressBar).

I’m using two independent modules - Core and GUI, so I can’t just send to Core glib::MainContent::channel sender.

I use crossbeam::channel to connect GUI and Core, but I don’t know how to receive messages in GUI side.
When I would receive this, I will send this info via glib::MainContent but this should I know how to do.

Is there any wa function that will execute once per 0.1 second to check if something is in chanell?

[alatiera (Jordan Petridis)]

Yes, you will need to use the glib channel, not crossbeam though.

    let (sender, reiceiver) = glib::MainContext::channel(glib::PRIORITY_DEFAULT);
    /// ...
    receiver.attach(None, move |action| app.do_action(action));

Attach takes a closure of type T where receiver<T>. Here are the docs for it

http://gtk-rs.org/docs/glib/struct.MainContext.html#method.channel

And here is an example of porting from a handrolled polled channel to glib channel.

https://gitlab.gnome.org/World/podcasts/-/commit/48f30c2e0b61fb25ec7a586ee8d44ec85cb02ea9

[qarmin (Rafał Mikrut)]

I can’t pass to core module glib channel directly, because I think about different than GTK frontends and this move would block this possibility.

[sdroege (Sebastian Dröge)]

You can use any futures-enabled channel and use it on the GLib main context. Any async runtime-independent Rust future can be spawned on the GLib main context.