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Remove Drawable and rename State to Program

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This commit is contained in:
Héctor Ramón Jiménez 2020-04-28 06:24:12 +02:00
parent 7f1e7aea07
commit 2539042b71
11 changed files with 202 additions and 304 deletions
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98
examples/clock/src/main.rs
View file

@ -1,6 +1,7 @@
use iced::{
canvas, executor, Application, Canvas, Color, Command, Container, Element,
Length, Point, Settings, Subscription, Vector,
canvas::{self, Cache, Canvas, Geometry, LineCap, Path, Stroke},
executor, Application, Color, Command, Container, Element, Length, Point,
Settings, Size, Subscription, Vector,
};
pub fn main() {
@ -11,8 +12,8 @@ pub fn main() {
}
struct Clock {
now: LocalTime,
clock: canvas::Cache,
now: chrono::DateTime<chrono::Local>,
clock: Cache,
}
#[derive(Debug, Clone, Copy)]
@ -28,7 +29,7 @@ impl Application for Clock {
fn new(_flags: ()) -> (Self, Command<Message>) {
(
Clock {
now: chrono::Local::now().into(),
now: chrono::Local::now(),
clock: Default::default(),
},
Command::none(),
@ -59,7 +60,7 @@ impl Application for Clock {
}
fn view(&mut self) -> Element<Message> {
let canvas = Canvas::new(self.clock.with(&self.now))
let canvas = Canvas::new(self)
.width(Length::Units(400))
.height(Length::Units(400));
@ -73,69 +74,54 @@ impl Application for Clock {
}
}
#[derive(Debug, PartialEq, Eq)]
struct LocalTime {
hour: u32,
minute: u32,
second: u32,
}
impl From<chrono::DateTime<chrono::Local>> for LocalTime {
fn from(date_time: chrono::DateTime<chrono::Local>) -> LocalTime {
impl canvas::Program<Message> for Clock {
fn draw(&self, bounds: Size) -> Vec<Geometry> {
use chrono::Timelike;
LocalTime {
hour: date_time.hour(),
minute: date_time.minute(),
second: date_time.second(),
}
}
}
let clock = self.clock.draw(bounds, |frame| {
let center = frame.center();
let radius = frame.width().min(frame.height()) / 2.0;
impl canvas::Drawable for LocalTime {
fn draw(&self, frame: &mut canvas::Frame) {
use canvas::Path;
let background = Path::circle(center, radius);
frame.fill(&background, Color::from_rgb8(0x12, 0x93, 0xD8));
let center = frame.center();
let radius = frame.width().min(frame.height()) / 2.0;
let short_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.5 * radius));
let clock = Path::circle(center, radius);
frame.fill(&clock, Color::from_rgb8(0x12, 0x93, 0xD8));
let long_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.8 * radius));
let short_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.5 * radius));
let thin_stroke = Stroke {
width: radius / 100.0,
color: Color::WHITE,
line_cap: LineCap::Round,
..Stroke::default()
};
let long_hand =
Path::line(Point::ORIGIN, Point::new(0.0, -0.8 * radius));
let wide_stroke = Stroke {
width: thin_stroke.width * 3.0,
..thin_stroke
};
let thin_stroke = canvas::Stroke {
width: radius / 100.0,
color: Color::WHITE,
line_cap: canvas::LineCap::Round,
..canvas::Stroke::default()
};
frame.translate(Vector::new(center.x, center.y));
let wide_stroke = canvas::Stroke {
width: thin_stroke.width * 3.0,
..thin_stroke
};
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.now.hour(), 12));
frame.stroke(&short_hand, wide_stroke);
});
frame.translate(Vector::new(center.x, center.y));
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.hour, 12));
frame.stroke(&short_hand, wide_stroke);
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.now.second(), 60));
frame.stroke(&long_hand, thin_stroke);
})
});
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.minute, 60));
frame.stroke(&long_hand, wide_stroke);
});
frame.with_save(|frame| {
frame.rotate(hand_rotation(self.second, 60));
frame.stroke(&long_hand, thin_stroke);
});
vec![clock]
}
}