I'm new to rust and having trouble with the scope of objects/variables in GTK. I have the following code, which works, but I need to set a label in the GTK Window to the text of the variable watch_text. Here is the code:
use adw::subclass::prelude::AdwApplicationWindowImpl;
use gtk::prelude::*;
use gtk::subclass::prelude::*;
use gtk::{gio, glib, CompositeTemplate};
use glib::{clone, DateTime, timeout_add};
use std::time::Duration;
use std::sync::{Arc, Mutex};
fn setup_signals(&self) {
let imp = imp::FurWindow::from_instance(self);
let running = Arc::new(Mutex::new(false));
imp.start_button.connect_clicked(clone!(@weak self as this, @strong running => move |_| {
if !*running.lock().unwrap() {
let mut secs: u32 = 0;
let mut mins: u32 = 0;
let mut hrs: u32 = 0;
this.inapp_notification("Starting Timer!");
*running.lock().unwrap() = true;
let stopwatch = DateTime::now_local();
let duration = Duration::new(1,0);
let timer_repeat = timeout_add(duration, clone!(@strong running as running_clone => move || {
if *running_clone.lock().unwrap() {
secs += 1;
if secs > 59 {
secs = 0;
mins += 1;
if mins > 59 {
mins = 0;
hrs += 1;
}
}
let watch_text: &str = &format!("{:02}:{:02}:{:02}", hrs, mins, secs).to_string();
println!("{}",watch_text);
// **Here the println works, everything prints correctly,
// but I need to add watch_text to the label "watch"
// this.set_watch_time(watch_text);
}
Continue(*running_clone.lock().unwrap())
}));
} else {
this.inapp_notification("Stopping Timer!");
*running.lock().unwrap() = false;
}
}));
}
The issue is that in the commented section, no matter how I try to access or clone imp.watch, I get an error NonNull<GObject> cannot be sent between threads safely. How can I set the label text to watch_text?
