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use iced::mouse;
use iced::time::{self, Instant, milliseconds};
use iced::widget::canvas;
use iced::{
Color, Element, Fill, Font, Point, Rectangle, Renderer, Subscription, Theme,
};
use std::cell::RefCell;
pub fn main() -> iced::Result {
tracing_subscriber::fmt::init();
iced::application("The Matrix - Iced", TheMatrix::update, TheMatrix::view)
.subscription(TheMatrix::subscription)
.antialiasing(true)
.run()
}
#[derive(Default)]
struct TheMatrix {
tick: usize,
}
#[derive(Debug, Clone, Copy)]
enum Message {
Tick(Instant),
}
impl TheMatrix {
fn update(&mut self, message: Message) {
match message {
Message::Tick(_now) => {
self.tick += 1;
}
}
}
fn view(&self) -> Element<Message> {
canvas(self).width(Fill).height(Fill).into()
}
fn subscription(&self) -> Subscription<Message> {
time::every(milliseconds(50)).map(Message::Tick)
}
}
impl<Message> canvas::Program<Message> for TheMatrix {
type State = RefCell<Vec<canvas::Cache>>;
fn draw(
&self,
state: &Self::State,
renderer: &Renderer,
_theme: &Theme,
bounds: Rectangle,
_cursor: mouse::Cursor,
) -> Vec<canvas::Geometry> {
use rand::Rng;
use rand::distributions::Distribution;
const CELL_SIZE: f32 = 10.0;
let mut caches = state.borrow_mut();
if caches.is_empty() {
let group = canvas::Group::unique();
caches.resize_with(30, || canvas::Cache::with_group(group));
}
vec![caches[self.tick % caches.len()].draw(
renderer,
bounds.size(),
|frame| {
frame.fill_rectangle(Point::ORIGIN, frame.size(), Color::BLACK);
let mut rng = rand::thread_rng();
let rows = (frame.height() / CELL_SIZE).ceil() as usize;
let columns = (frame.width() / CELL_SIZE).ceil() as usize;
for row in 0..rows {
for column in 0..columns {
let position = Point::new(
column as f32 * CELL_SIZE,
row as f32 * CELL_SIZE,
);
let alphas = [0.05, 0.1, 0.2, 0.5];
let weights = [10, 4, 2, 1];
let distribution =
rand::distributions::WeightedIndex::new(weights)
.expect("Create distribution");
frame.fill_text(canvas::Text {
content: rng.gen_range('!'..'z').to_string(),
position,
color: Color {
a: alphas[distribution.sample(&mut rng)],
g: 1.0,
..Color::BLACK
},
size: CELL_SIZE.into(),
font: Font::MONOSPACE,
..canvas::Text::default()
});
}
}
},
)]
}
}
|
