winit_app/
app_listener.rs

1//! Module to help deal with events emitted by `Application`
2//!
3use log::warn;
4use winit::application::ApplicationHandler;
5use winit::event::WindowEvent;
6use winit::event_loop::ActiveEventLoop;
7use winit::window::{Window, WindowAttributes, WindowId};
8
9/// `AppWindowEvent` represents the event emitted by Application based
10/// on the listener interface
11pub enum AppWindowEvent<'a> {
12    NewWindow(Box<dyn Window>),
13    OnWindowEvent(WindowEvent, &'a dyn ActiveEventLoop),
14}
15
16pub(crate) struct AppListener<F>
17where
18    F: FnMut(AppWindowEvent),
19{
20    fn_on_listen_window: F,
21
22    window_attributes: WindowAttributes,
23}
24
25impl<F> AppListener<F>
26where
27    F: FnMut(AppWindowEvent),
28{
29    pub(crate) fn new(window_attributes: WindowAttributes, fn_on_listen_window: F) -> Self
30    where
31        F: FnMut(AppWindowEvent),
32    {
33        Self {
34            window_attributes,
35            fn_on_listen_window,
36        }
37    }
38}
39
40impl<F> ApplicationHandler for AppListener<F>
41where
42    F: FnMut(AppWindowEvent),
43{
44    fn can_create_surfaces(&mut self, event_loop: &dyn ActiveEventLoop) {
45        // The event loop has launched, and we can initialize our UI state.
46
47        // Create a simple window with default attributes.
48        match event_loop.create_window(self.window_attributes.clone()) {
49            Ok(window) => {
50                (self.fn_on_listen_window)(AppWindowEvent::NewWindow(window));
51            }
52            Err(err) => {
53                warn!("Error creating a new window {:?}", err);
54            }
55        }
56    }
57
58    fn window_event(
59        &mut self,
60        event_loop: &dyn ActiveEventLoop,
61        _id: WindowId,
62        event: WindowEvent,
63    ) {
64        (self.fn_on_listen_window)(AppWindowEvent::OnWindowEvent(event, event_loop));
65    }
66}
winit_app/app_listener.rs

winit_app/
app_listener.rs
