winit-sonoma-fix/examples/multithreaded.rs
Kirill Chibisov 9ac3259a79
Remove lifetime from the Event
Lifetimes don't work nicely when dealing with multithreaded environments
in the current design of the existing winit's event handling model, so
remove it in favor of `InnerSizeWriter` fences passed to client, so they
could try to update the size.

Fixes #1387.
2023-07-31 00:39:01 +04:00

211 lines
10 KiB
Rust

#![allow(clippy::single_match)]
#[cfg(not(wasm_platform))]
fn main() -> Result<(), impl std::error::Error> {
use std::{collections::HashMap, sync::mpsc, thread, time::Duration};
use simple_logger::SimpleLogger;
use winit::{
dpi::{PhysicalPosition, PhysicalSize, Position, Size},
event::{ElementState, Event, KeyEvent, WindowEvent},
event_loop::EventLoop,
keyboard::{Key, ModifiersState},
window::{CursorGrabMode, CursorIcon, Fullscreen, WindowBuilder, WindowLevel},
};
const WINDOW_COUNT: usize = 3;
const WINDOW_SIZE: PhysicalSize<u32> = PhysicalSize::new(600, 400);
SimpleLogger::new().init().unwrap();
let event_loop = EventLoop::new();
let mut window_senders = HashMap::with_capacity(WINDOW_COUNT);
for _ in 0..WINDOW_COUNT {
let window = WindowBuilder::new()
.with_inner_size(WINDOW_SIZE)
.build(&event_loop)
.unwrap();
let mut video_modes: Vec<_> = window.current_monitor().unwrap().video_modes().collect();
let mut video_mode_id = 0usize;
let (tx, rx) = mpsc::channel();
window_senders.insert(window.id(), tx);
let mut modifiers = ModifiersState::default();
thread::spawn(move || {
while let Ok(event) = rx.recv() {
match event {
WindowEvent::Moved { .. } => {
// We need to update our chosen video mode if the window
// was moved to an another monitor, so that the window
// appears on this monitor instead when we go fullscreen
let previous_video_mode = video_modes.get(video_mode_id).cloned();
video_modes = window.current_monitor().unwrap().video_modes().collect();
video_mode_id = video_mode_id.min(video_modes.len());
let video_mode = video_modes.get(video_mode_id);
// Different monitors may support different video modes,
// and the index we chose previously may now point to a
// completely different video mode, so notify the user
if video_mode != previous_video_mode.as_ref() {
println!(
"Window moved to another monitor, picked video mode: {}",
video_modes.get(video_mode_id).unwrap()
);
}
}
WindowEvent::ModifiersChanged(new) => {
modifiers = new.state();
}
WindowEvent::KeyboardInput {
event:
KeyEvent {
state: ElementState::Released,
logical_key: key,
..
},
..
} => {
use Key::{ArrowLeft, ArrowRight};
window.set_title(&format!("{key:?}"));
let state = !modifiers.shift_key();
match key {
// Cycle through video modes
Key::ArrowRight | Key::ArrowLeft => {
video_mode_id = match key {
ArrowLeft => video_mode_id.saturating_sub(1),
ArrowRight => (video_modes.len() - 1).min(video_mode_id + 1),
_ => unreachable!(),
};
println!("Picking video mode: {}", video_modes[video_mode_id]);
}
// WARNING: Consider using `key_without_modifers()` if available on your platform.
// See the `key_binding` example
Key::Character(ch) => match ch.to_lowercase().as_str() {
"1" => window.set_window_level(WindowLevel::AlwaysOnTop),
"2" => window.set_window_level(WindowLevel::AlwaysOnBottom),
"3" => window.set_window_level(WindowLevel::Normal),
"c" => window.set_cursor_icon(match state {
true => CursorIcon::Progress,
false => CursorIcon::Default,
}),
"d" => window.set_decorations(!state),
"f" => window.set_fullscreen(match (state, modifiers.alt_key()) {
(true, false) => Some(Fullscreen::Borderless(None)),
(true, true) => Some(Fullscreen::Exclusive(
video_modes[video_mode_id].clone(),
)),
(false, _) => None,
}),
"l" if state => {
if let Err(err) = window.set_cursor_grab(CursorGrabMode::Locked)
{
println!("error: {err}");
}
}
"g" if state => {
if let Err(err) =
window.set_cursor_grab(CursorGrabMode::Confined)
{
println!("error: {err}");
}
}
"g" | "l" if !state => {
if let Err(err) = window.set_cursor_grab(CursorGrabMode::None) {
println!("error: {err}");
}
}
"h" => window.set_cursor_visible(!state),
"i" => {
println!("Info:");
println!("-> outer_position : {:?}", window.outer_position());
println!("-> inner_position : {:?}", window.inner_position());
println!("-> outer_size : {:?}", window.outer_size());
println!("-> inner_size : {:?}", window.inner_size());
println!("-> fullscreen : {:?}", window.fullscreen());
}
"l" => window.set_min_inner_size(match state {
true => Some(WINDOW_SIZE),
false => None,
}),
"m" => window.set_maximized(state),
"p" => window.set_outer_position({
let mut position = window.outer_position().unwrap();
let sign = if state { 1 } else { -1 };
position.x += 10 * sign;
position.y += 10 * sign;
position
}),
"q" => window.request_redraw(),
"r" => window.set_resizable(state),
"s" => {
let _ = window.request_inner_size(match state {
true => PhysicalSize::new(
WINDOW_SIZE.width + 100,
WINDOW_SIZE.height + 100,
),
false => WINDOW_SIZE,
});
}
"w" => {
if let Size::Physical(size) = WINDOW_SIZE.into() {
window
.set_cursor_position(Position::Physical(
PhysicalPosition::new(
size.width as i32 / 2,
size.height as i32 / 2,
),
))
.unwrap()
}
}
"z" => {
window.set_visible(false);
thread::sleep(Duration::from_secs(1));
window.set_visible(true);
}
_ => (),
},
_ => (),
}
}
_ => (),
}
}
});
}
event_loop.run(move |event, _event_loop, control_flow| {
match !window_senders.is_empty() {
true => control_flow.set_wait(),
false => control_flow.set_exit(),
};
match event {
Event::WindowEvent { event, window_id } => match event {
WindowEvent::CloseRequested
| WindowEvent::Destroyed
| WindowEvent::KeyboardInput {
event:
KeyEvent {
state: ElementState::Released,
logical_key: Key::Escape,
..
},
..
} => {
window_senders.remove(&window_id);
}
_ => {
if let Some(tx) = window_senders.get(&window_id) {
tx.send(event).unwrap();
}
}
},
_ => {}
}
})
}
#[cfg(wasm_platform)]
fn main() {
panic!("Example not supported on Wasm");
}