winit-sonoma-fix/examples/resizable.rs
Robert Bragg 0d366ffbda Re-work event loop run() API so it can return a Result
This re-works the portable `run()` API that consumes the `EventLoop` and
runs the loop on the calling thread until the app exits.

This can be supported across _all_ platforms and compared to the
previous `run() -> !` API is now able to return a `Result` status on all
platforms except iOS and Web. Fixes: #2709

By moving away from `run() -> !` we stop calling `std::process::exit()`
internally as a means to kill the process without returning which means
it's possible to return an exit status and applications can return from
their `main()` function normally.

This also fixes Android support where an Activity runs in a thread but
we can't assume to have full ownership of the process (other services
could be running in separate threads).

Additionally all examples have generally been updated so that `main()`
returns a `Result` from `run()`

Fixes: #2709
2023-07-28 03:04:32 +04:00

58 lines
1.7 KiB
Rust

#![allow(clippy::single_match)]
use simple_logger::SimpleLogger;
use winit::{
dpi::LogicalSize,
event::{ElementState, Event, KeyEvent, WindowEvent},
event_loop::EventLoop,
keyboard::KeyCode,
window::WindowBuilder,
};
#[path = "util/fill.rs"]
mod fill;
fn main() -> Result<(), impl std::error::Error> {
SimpleLogger::new().init().unwrap();
let event_loop = EventLoop::new();
let mut resizable = false;
let window = WindowBuilder::new()
.with_title("Hit space to toggle resizability.")
.with_inner_size(LogicalSize::new(600.0, 300.0))
.with_min_inner_size(LogicalSize::new(400.0, 200.0))
.with_max_inner_size(LogicalSize::new(800.0, 400.0))
.with_resizable(resizable)
.build(&event_loop)
.unwrap();
event_loop.run(move |event, _, control_flow| {
control_flow.set_wait();
match event {
Event::WindowEvent { event, .. } => match event {
WindowEvent::CloseRequested => control_flow.set_exit(),
WindowEvent::KeyboardInput {
event:
KeyEvent {
physical_key: KeyCode::Space,
state: ElementState::Released,
..
},
..
} => {
resizable = !resizable;
println!("Resizable: {resizable}");
window.set_resizable(resizable);
}
_ => (),
},
Event::RedrawRequested(_) => {
fill::fill_window(&window);
}
_ => (),
};
})
}