cadmus_core/view/
startup.rs

1use super::{Bus, Event, Hub, Id, RenderQueue, View, ID_FEEDER};
2use crate::color::TEXT_NORMAL;
3use crate::context::Context;
4use crate::device::CURRENT_DEVICE;
5use crate::fl;
6use crate::font::{font_from_style, Fonts, DISPLAY_FONT_SIZE, DISPLAY_STYLE};
7use crate::framebuffer::Framebuffer;
8use crate::geom::Rectangle;
9
10/// Full-screen startup view shown while the app initialises.
11///
12/// Displays a static "Cadmus starting up…" message. Drop the view just
13/// before constructing `Home` to hand off the screen.
14pub struct StartupScreen {
15    id: Id,
16    rect: Rectangle,
17    children: Vec<Box<dyn View>>,
18}
19
20impl StartupScreen {
21    pub fn new(rect: Rectangle) -> StartupScreen {
22        StartupScreen {
23            id: ID_FEEDER.next(),
24            rect,
25            children: Vec::new(),
26        }
27    }
28}
29
30impl View for StartupScreen {
31    #[cfg_attr(feature = "otel", tracing::instrument(skip(self, _hub, _bus, _rq, _context), fields(event = ?_evt), ret(level=tracing::Level::TRACE)))]
32    fn handle_event(
33        &mut self,
34        _evt: &Event,
35        _hub: &Hub,
36        _bus: &mut Bus,
37        _rq: &mut RenderQueue,
38        _context: &mut Context,
39    ) -> bool {
40        true
41    }
42
43    #[cfg_attr(feature = "otel", tracing::instrument(skip(self, fb, fonts), fields(rect = ?rect)))]
44    fn render(&self, fb: &mut dyn Framebuffer, rect: Rectangle, fonts: &mut Fonts) {
45        let scheme = TEXT_NORMAL;
46
47        fb.draw_rectangle(&self.rect, scheme[0]);
48
49        let dpi = CURRENT_DEVICE.dpi;
50        let font = font_from_style(fonts, &DISPLAY_STYLE, dpi);
51        font.set_size(DISPLAY_FONT_SIZE / 2, dpi);
52        let padding = font.em() as i32;
53        let max_width = self.rect.width() as i32 - 3 * padding;
54
55        let label = fl!("startup-loading");
56
57        let mut plan = font.plan(label.as_str(), None, None);
58
59        if plan.width > max_width {
60            let scale = max_width as f32 / plan.width as f32;
61            let size = (scale * (DISPLAY_FONT_SIZE / 2) as f32) as u32;
62            font.set_size(size, dpi);
63            plan = font.plan(label, None, None);
64        }
65
66        let dx = (self.rect.width() as i32 - plan.width) / 2;
67        let dy = (self.rect.height() as i32 - font.ascender()) / 2;
68
69        font.render(fb, scheme[1], &plan, pt!(dx, dy));
70
71        let _ = rect;
72    }
73
74    fn might_rotate(&self) -> bool {
75        false
76    }
77
78    fn rect(&self) -> &Rectangle {
79        &self.rect
80    }
81
82    fn rect_mut(&mut self) -> &mut Rectangle {
83        &mut self.rect
84    }
85
86    fn children(&self) -> &Vec<Box<dyn View>> {
87        &self.children
88    }
89
90    fn children_mut(&mut self) -> &mut Vec<Box<dyn View>> {
91        &mut self.children
92    }
93
94    fn id(&self) -> Id {
95        self.id
96    }
97}
cadmus_core/view/startup.rs

cadmus_core/view/
startup.rs
