use std::{
io::stdout,
time::{Duration, Instant},
};
use color_eyre::Result;
use crossterm::{
event::{DisableMouseCapture, EnableMouseCapture, KeyEventKind},
ExecutableCommand,
};
use itertools::Itertools;
use ratatui::{
crossterm::event::{self, Event, KeyCode, MouseEventKind},
layout::{Constraint, Layout, Position, Rect},
style::{Color, Stylize},
symbols::Marker,
widgets::{
canvas::{Canvas, Circle, Map, MapResolution, Points, Rectangle},
Block, Widget,
},
DefaultTerminal, Frame,
};
fn main() -> Result<()> {
color_eyre::install()?;
stdout().execute(EnableMouseCapture)?;
let terminal = ratatui::init();
let app_result = App::new().run(terminal);
ratatui::restore();
stdout().execute(DisableMouseCapture)?;
app_result
}
struct App {
exit: bool,
x: f64,
y: f64,
ball: Circle,
playground: Rect,
vx: f64,
vy: f64,
tick_count: u64,
marker: Marker,
points: Vec<Position>,
is_drawing: bool,
}
impl App {
const fn new() -> Self {
Self {
exit: false,
x: 0.0,
y: 0.0,
ball: Circle {
x: 20.0,
y: 40.0,
radius: 10.0,
color: Color::Yellow,
},
playground: Rect::new(10, 10, 200, 100),
vx: 1.0,
vy: 1.0,
tick_count: 0,
marker: Marker::Dot,
points: vec![],
is_drawing: false,
}
}
pub fn run(mut self, mut terminal: DefaultTerminal) -> Result<()> {
let tick_rate = Duration::from_millis(16);
let mut last_tick = Instant::now();
while !self.exit {
terminal.draw(|frame| self.draw(frame))?;
let timeout = tick_rate.saturating_sub(last_tick.elapsed());
if event::poll(timeout)? {
match event::read()? {
Event::Key(key) => self.handle_key_press(key),
Event::Mouse(event) => self.handle_mouse_event(event),
_ => (),
}
}
if last_tick.elapsed() >= tick_rate {
self.on_tick();
last_tick = Instant::now();
}
}
Ok(())
}
fn handle_key_press(&mut self, key: event::KeyEvent) {
if key.kind != KeyEventKind::Press {
return;
}
match key.code {
KeyCode::Char('q') => self.exit = true,
KeyCode::Down | KeyCode::Char('j') => self.y += 1.0,
KeyCode::Up | KeyCode::Char('k') => self.y -= 1.0,
KeyCode::Right | KeyCode::Char('l') => self.x += 1.0,
KeyCode::Left | KeyCode::Char('h') => self.x -= 1.0,
_ => {}
}
}
fn handle_mouse_event(&mut self, event: event::MouseEvent) {
match event.kind {
MouseEventKind::Down(_) => self.is_drawing = true,
MouseEventKind::Up(_) => self.is_drawing = false,
MouseEventKind::Drag(_) => {
self.points.push(Position::new(event.column, event.row));
}
_ => {}
}
}
fn on_tick(&mut self) {
self.tick_count += 1;
if (self.tick_count % 180) == 0 {
self.marker = match self.marker {
Marker::Dot => Marker::Braille,
Marker::Braille => Marker::Block,
Marker::Block => Marker::HalfBlock,
Marker::HalfBlock => Marker::Bar,
Marker::Bar => Marker::Dot,
};
}
let ball = &self.ball;
let playground = self.playground;
if ball.x - ball.radius < f64::from(playground.left())
|| ball.x + ball.radius > f64::from(playground.right())
{
self.vx = -self.vx;
}
if ball.y - ball.radius < f64::from(playground.top())
|| ball.y + ball.radius > f64::from(playground.bottom())
{
self.vy = -self.vy;
}
self.ball.x += self.vx;
self.ball.y += self.vy;
}
fn draw(&self, frame: &mut Frame) {
let horizontal =
Layout::horizontal([Constraint::Percentage(50), Constraint::Percentage(50)]);
let vertical = Layout::vertical([Constraint::Percentage(50), Constraint::Percentage(50)]);
let [left, right] = horizontal.areas(frame.area());
let [draw, map] = vertical.areas(left);
let [pong, boxes] = vertical.areas(right);
frame.render_widget(self.map_canvas(), map);
frame.render_widget(self.draw_canvas(draw), draw);
frame.render_widget(self.pong_canvas(), pong);
frame.render_widget(self.boxes_canvas(boxes), boxes);
}
fn map_canvas(&self) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("World"))
.marker(self.marker)
.paint(|ctx| {
ctx.draw(&Map {
color: Color::Green,
resolution: MapResolution::High,
});
ctx.print(self.x, -self.y, "You are here".yellow());
})
.x_bounds([-180.0, 180.0])
.y_bounds([-90.0, 90.0])
}
fn draw_canvas(&self, area: Rect) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("Draw here"))
.marker(self.marker)
.x_bounds([0.0, f64::from(area.width)])
.y_bounds([0.0, f64::from(area.height)])
.paint(move |ctx| {
let points = self
.points
.iter()
.map(|p| {
(
f64::from(p.x) - f64::from(area.left()),
f64::from(area.bottom()) - f64::from(p.y),
)
})
.collect_vec();
ctx.draw(&Points {
coords: &points,
color: Color::White,
});
})
}
fn pong_canvas(&self) -> impl Widget + '_ {
Canvas::default()
.block(Block::bordered().title("Pong"))
.marker(self.marker)
.paint(|ctx| {
ctx.draw(&self.ball);
})
.x_bounds([10.0, 210.0])
.y_bounds([10.0, 110.0])
}
fn boxes_canvas(&self, area: Rect) -> impl Widget {
let left = 0.0;
let right = f64::from(area.width);
let bottom = 0.0;
let top = f64::from(area.height).mul_add(2.0, -4.0);
Canvas::default()
.block(Block::bordered().title("Rects"))
.marker(self.marker)
.x_bounds([left, right])
.y_bounds([bottom, top])
.paint(|ctx| {
for i in 0..=11 {
ctx.draw(&Rectangle {
x: f64::from(i * i + 3 * i) / 2.0 + 2.0,
y: 2.0,
width: f64::from(i),
height: f64::from(i),
color: Color::Red,
});
ctx.draw(&Rectangle {
x: f64::from(i * i + 3 * i) / 2.0 + 2.0,
y: 21.0,
width: f64::from(i),
height: f64::from(i),
color: Color::Blue,
});
}
for i in 0..100 {
if i % 10 != 0 {
ctx.print(f64::from(i) + 1.0, 0.0, format!("{i}", i = i % 10));
}
if i % 2 == 0 && i % 10 != 0 {
ctx.print(0.0, f64::from(i), format!("{i}", i = i % 10));
}
}
})
}
}