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|
use iced::executor;
use iced::mouse;
use iced::widget::canvas::{stroke, Cache, Geometry, LineCap, Path, Stroke};
use iced::widget::{canvas, container};
use iced::{
Application, Color, Command, Element, Length, Point, Rectangle, Renderer,
Settings, Subscription, Theme, Vector,
};
pub fn main() -> iced::Result {
Clock::run(Settings {
antialiasing: true,
..Settings::default()
})
}
struct Clock {
now: time::OffsetDateTime,
clock: Cache,
}
#[derive(Debug, Clone, Copy)]
enum Message {
Tick(time::OffsetDateTime),
}
impl Application for Clock {
type Executor = executor::Default;
type Message = Message;
type Theme = Theme;
type Flags = ();
fn new(_flags: ()) -> (Self, Command<Message>) {
(
Clock {
now: time::OffsetDateTime::now_local()
.unwrap_or_else(|_| time::OffsetDateTime::now_utc()),
clock: Default::default(),
},
Command::none(),
)
}
fn title(&self) -> String {
String::from("Clock - Iced")
}
fn update(&mut self, message: Message) -> Command<Message> {
match message {
Message::Tick(local_time) => {
let now = local_time;
if now != self.now {
self.now = now;
self.clock.clear();
}
}
}
Command::none()
}
fn view(&self) -> Element<Message> {
let canvas = canvas(self as &Self)
.width(Length::Fill)
.height(Length::Fill);
container(canvas)
.width(Length::Fill)
.height(Length::Fill)
.padding(20)
.into()
}
fn subscription(&self) -> Subscription<Message> {
iced::time::every(std::time::Duration::from_millis(500)).map(|_| {
Message::Tick(
time::OffsetDateTime::now_local()
.unwrap_or_else(|_| time::OffsetDateTime::now_utc()),
)
})
}
}
impl<Message> canvas::Program<Message, Renderer> for Clock {
type State = ();
fn draw(
&self,
_state: &Self::State,
renderer: &Renderer,
_theme: &Theme,
bounds: Rectangle,
_cursor: mouse::Cursor,
) -> Vec<Geometry> {
let clock = self.clock.draw(renderer, bounds.size(), |frame| {
let center = frame.center();
let radius = frame.width().min(frame.height()) / 2.0;
let background = Path::circle(center, radius);
frame.fill(&background, Color::from_rgb8(0x12, 0x93, 0xD8));
let short_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.5 * radius));
let long_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.8 * radius));
let width = radius / 100.0;
let thin_stroke = || -> Stroke {
Stroke {
width,
style: stroke::Style::Solid(Color::WHITE),
line_cap: LineCap::Round,
..Stroke::default()
}
};
let wide_stroke = || -> Stroke {
Stroke {
width: width * 3.0,
style: stroke::Style::Solid(Color::WHITE),
line_cap: LineCap::Round,
..Stroke::default()
}
};
frame.translate(Vector::new(center.x, center.y));
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.now.hour(), 12));
frame.stroke(&short_hand, wide_stroke());
});
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.now.minute(), 60));
frame.stroke(&long_hand, wide_stroke());
});
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.now.second(), 60));
frame.stroke(&long_hand, thin_stroke());
})
});
vec![clock]
}
}
fn hand_rotation(n: u8, total: u8) -> f32 {
let turns = n as f32 / total as f32;
2.0 * std::f32::consts::PI * turns
}
|
