1use gpui::{
 2    Application, Background, Bounds, ColorSpace, Context, Path, PathBuilder, Pixels, Render,
 3    TitlebarOptions, Window, WindowBounds, WindowOptions, canvas, div, linear_color_stop,
 4    linear_gradient, point, prelude::*, px, rgb, size,
 5};
 6
 7const DEFAULT_WINDOW_WIDTH: Pixels = px(1024.0);
 8const DEFAULT_WINDOW_HEIGHT: Pixels = px(768.0);
 9
10struct PaintingViewer {
11    default_lines: Vec<(Path<Pixels>, Background)>,
12    _painting: bool,
13}
14
15impl PaintingViewer {
16    fn new(_window: &mut Window, _cx: &mut Context<Self>) -> Self {
17        let mut lines = vec![];
18
19        // draw a lightening bolt ⚡
20        for _ in 0..2000 {
21            // draw a ⭐
22            let mut builder = PathBuilder::fill();
23            builder.move_to(point(px(350.), px(100.)));
24            builder.line_to(point(px(370.), px(160.)));
25            builder.line_to(point(px(430.), px(160.)));
26            builder.line_to(point(px(380.), px(200.)));
27            builder.line_to(point(px(400.), px(260.)));
28            builder.line_to(point(px(350.), px(220.)));
29            builder.line_to(point(px(300.), px(260.)));
30            builder.line_to(point(px(320.), px(200.)));
31            builder.line_to(point(px(270.), px(160.)));
32            builder.line_to(point(px(330.), px(160.)));
33            builder.line_to(point(px(350.), px(100.)));
34            let path = builder.build().unwrap();
35            lines.push((
36                path,
37                linear_gradient(
38                    180.,
39                    linear_color_stop(rgb(0xFACC15), 0.7),
40                    linear_color_stop(rgb(0xD56D0C), 1.),
41                )
42                .color_space(ColorSpace::Oklab),
43            ));
44        }
45
46        Self {
47            default_lines: lines,
48            _painting: false,
49        }
50    }
51}
52
53impl Render for PaintingViewer {
54    fn render(&mut self, window: &mut Window, _: &mut Context<Self>) -> impl IntoElement {
55        window.request_animation_frame();
56        let lines = self.default_lines.clone();
57        div().size_full().child(
58            canvas(
59                move |_, _, _| {},
60                move |_, _, window, _| {
61                    for (path, color) in lines {
62                        window.paint_path(path, color);
63                    }
64                },
65            )
66            .size_full(),
67        )
68    }
69}
70
71fn main() {
72    Application::new().run(|cx| {
73        cx.open_window(
74            WindowOptions {
75                titlebar: Some(TitlebarOptions {
76                    title: Some("Vulkan".into()),
77                    ..Default::default()
78                }),
79                focus: true,
80                window_bounds: Some(WindowBounds::Windowed(Bounds::centered(
81                    None,
82                    size(DEFAULT_WINDOW_WIDTH, DEFAULT_WINDOW_HEIGHT),
83                    cx,
84                ))),
85                ..Default::default()
86            },
87            |window, cx| cx.new(|cx| PaintingViewer::new(window, cx)),
88        )
89        .unwrap();
90        cx.activate(true);
91    });
92}