winit-sonoma-fix/examples/timer.rs

use instant::Instant;
use std::time::Duration;
use winit::{
    event::{Event, StartCause, WindowEvent},
    event_loop::{ControlFlow, EventLoop},
    window::WindowBuilder,
};

fn main() {
    let event_loop = EventLoop::new();

    let _window = WindowBuilder::new()
        .with_title("A fantastic window!")
        .build(&event_loop)
        .unwrap();

    let timer_length = Duration::new(1, 0);

    event_loop.run(move |event, _, control_flow| {
        if let Event::WindowEvent { event, .. } = &event {
            // Print only Window events to reduce noise
            println!("{:?}", event);
        }

        match event {
            Event::NewEvents(StartCause::Init) => {
                *control_flow = ControlFlow::WaitUntil(Instant::now() + timer_length)
            }
            Event::NewEvents(StartCause::ResumeTimeReached { .. }) => {
                *control_flow = ControlFlow::WaitUntil(Instant::now() + timer_length);
                println!("\nTimer\n");
            }
            Event::WindowEvent {
                event: WindowEvent::CloseRequested,
                ..
            } => *control_flow = ControlFlow::Exit,
            _ => (),
        }
    });
}