winit_ui/
app.rs

1pub struct App {
2    window: Option<std::sync::Arc<winit::window::Window>>,
3    pixels: Option<pixels::Pixels<'static>>,
4    title: String,
5    width: u32,
6    height: u32,
7    resizable: bool,
8    fullscreen: bool,
9    draw_fn: Option<Box<dyn FnMut(&mut crate::canvas::Canvas)>>,
10}
11
12impl App {
13    pub fn new(title: &str, width: u32, height: u32, resizable: bool, fullscreen: bool) -> Self {
14        Self {
15            window: None,
16            pixels: None,
17            title: title.to_string(),
18            width,
19            height,
20            resizable,
21            fullscreen,
22            draw_fn: None,
23        }
24    }
25
26    pub fn on_draw(&mut self, f: impl FnMut(&mut crate::canvas::Canvas) + 'static) -> &mut Self {
27        self.draw_fn = Some(Box::new(f));
28        self
29    }
30
31    pub fn run(mut self) {
32        let event_loop = winit::event_loop::EventLoop::new().unwrap();
33        event_loop.run_app(&mut self).unwrap();
34    }
35}
36
37impl winit::application::ApplicationHandler for App {
38    fn resumed(&mut self, event_loop: &winit::event_loop::ActiveEventLoop) {
39        let attributes = winit::window::Window::default_attributes()
40            .with_title(self.title.clone())
41            .with_resizable(self.resizable)
42            .with_inner_size(winit::dpi::PhysicalSize::new(self.width, self.height))
43            .with_fullscreen(
44                if self.fullscreen {
45                    Some(winit::window::Fullscreen::Borderless(None))
46                }
47                else {
48                    None
49                }
50            );
51        
52        let window = std::sync::Arc::new(event_loop.create_window(attributes).expect("Failed to create window"));
53
54        let surface_texture = pixels::SurfaceTexture::new(self.width, self.height, window.clone());
55        let pixels = pixels::Pixels::new(self.width, self.height, surface_texture).unwrap();
56        
57        self.pixels = Some(pixels);
58        self.window = Some(window);
59        self.window.as_ref().unwrap().request_redraw();
60    }
61
62    fn window_event(
63        &mut self,
64        event_loop: &winit::event_loop::ActiveEventLoop,
65        window_id: winit::window::WindowId,
66        event: winit::event::WindowEvent,
67    )
68    {
69        if let Some(window) = &self.window {
70            if window.id() == window_id {
71                match event {
72                    winit::event::WindowEvent::CloseRequested => {
73                        event_loop.exit();
74                    },
75                    winit::event::WindowEvent::RedrawRequested => {
76                        if let (Some(pixels), Some(draw_fn)) = (self.pixels.as_mut(), self.draw_fn.as_mut()) {
77                            let mut canvas = crate::canvas::Canvas::new(pixels.frame_mut(), self.width, self.height);
78                            draw_fn(&mut canvas);
79                            pixels.render().unwrap();
80                        }
81                        self.window.as_ref().unwrap().request_redraw();
82                    }
83                    _ => {}
84                }
85            }
86        }
87    }
88}
winit_ui/app.rs

winit_ui/
app.rs
