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Draft UI event loop

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This commit is contained in:
Héctor Ramón Jiménez 2019-10-03 01:59:16 +02:00
parent fc38119be3
commit ebb8dbb065
1 changed files with 39 additions and 2 deletions
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41
src/lib.rs
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@ -15,9 +15,9 @@ pub trait UserInterface {
fn view(&mut self) -> Element<Self::Message>;
fn run(self)
fn run(mut self)
where
Self: Sized,
Self: 'static + Sized,
{
use winit::{
event::{Event, WindowEvent},
@ -37,10 +37,47 @@ pub trait UserInterface {
let mut renderer =
Renderer::new(&window, size.width as u32, size.height as u32);
let mut cache = Some(iced_winit::Cache::default());
let mut events = Vec::new();
window.request_redraw();
event_loop.run(move |event, _, control_flow| match event {
Event::EventsCleared => {
// TODO: Once we remove lifetimes from widgets, we will be able
// to keep user interfaces alive between events.
//
// This will allow us to only rebuild when a message is handled.
let mut user_interface = iced_winit::UserInterface::build(
self.view(),
cache.take().unwrap(),
&mut renderer,
);
let messages = user_interface.update(events.drain(..));
if messages.is_empty() {
let _ = user_interface.draw(&mut renderer);
cache = Some(user_interface.into_cache());
} else {
let temp_cache = user_interface.into_cache();
for message in messages {
self.update(message);
}
let user_interface = iced_winit::UserInterface::build(
self.view(),
temp_cache,
&mut renderer,
);
let _ = user_interface.draw(&mut renderer);
cache = Some(user_interface.into_cache());
};
window.request_redraw();
}
Event::WindowEvent {