tui 0.9.5

A library to build rich terminal user interfaces or dashboards
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149

#[allow(dead_code)]
mod util;

use crate::util::event::{Config, Event, Events};
use std::{error::Error, io, time::Duration};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
    backend::TermionBackend,
    layout::{Constraint, Direction, Layout, Rect},
    style::Color,
    widgets::{
        canvas::{Canvas, Map, MapResolution, Rectangle},
        Block, Borders,
    },
    Terminal,
};

struct App {
    x: f64,
    y: f64,
    ball: Rectangle,
    playground: Rect,
    vx: f64,
    vy: f64,
    dir_x: bool,
    dir_y: bool,
}

impl App {
    fn new() -> App {
        App {
            x: 0.0,
            y: 0.0,
            ball: Rectangle {
                x: 10.0,
                y: 30.0,
                width: 10.0,
                height: 10.0,
                color: Color::Yellow,
            },
            playground: Rect::new(10, 10, 100, 100),
            vx: 1.0,
            vy: 1.0,
            dir_x: true,
            dir_y: true,
        }
    }

    fn update(&mut self) {
        if self.ball.x < self.playground.left() as f64
            || self.ball.x + self.ball.width > self.playground.right() as f64
        {
            self.dir_x = !self.dir_x;
        }
        if self.ball.y < self.playground.top() as f64
            || self.ball.y + self.ball.height > self.playground.bottom() as f64
        {
            self.dir_y = !self.dir_y;
        }

        if self.dir_x {
            self.ball.x += self.vx;
        } else {
            self.ball.x -= self.vx;
        }

        if self.dir_y {
            self.ball.y += self.vy;
        } else {
            self.ball.y -= self.vy
        }
    }
}

fn main() -> Result<(), Box<dyn Error>> {
    // Terminal initialization
    let stdout = io::stdout().into_raw_mode()?;
    let stdout = MouseTerminal::from(stdout);
    let stdout = AlternateScreen::from(stdout);
    let backend = TermionBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;
    terminal.hide_cursor()?;

    // Setup event handlers
    let config = Config {
        tick_rate: Duration::from_millis(250),
        ..Default::default()
    };
    let events = Events::with_config(config);

    // App
    let mut app = App::new();

    loop {
        terminal.draw(|mut f| {
            let chunks = Layout::default()
                .direction(Direction::Horizontal)
                .constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
                .split(f.size());
            let canvas = Canvas::default()
                .block(Block::default().borders(Borders::ALL).title("World"))
                .paint(|ctx| {
                    ctx.draw(&Map {
                        color: Color::White,
                        resolution: MapResolution::High,
                    });
                    ctx.print(app.x, -app.y, "You are here", Color::Yellow);
                })
                .x_bounds([-180.0, 180.0])
                .y_bounds([-90.0, 90.0]);
            f.render_widget(canvas, chunks[0]);
            let canvas = Canvas::default()
                .block(Block::default().borders(Borders::ALL).title("Pong"))
                .paint(|ctx| {
                    ctx.draw(&app.ball);
                })
                .x_bounds([10.0, 110.0])
                .y_bounds([10.0, 110.0]);
            f.render_widget(canvas, chunks[1]);
        })?;

        match events.next()? {
            Event::Input(input) => match input {
                Key::Char('q') => {
                    break;
                }
                Key::Down => {
                    app.y += 1.0;
                }
                Key::Up => {
                    app.y -= 1.0;
                }
                Key::Right => {
                    app.x += 1.0;
                }
                Key::Left => {
                    app.x -= 1.0;
                }

                _ => {}
            },
            Event::Tick => {
                app.update();
            }
        }
    }

    Ok(())
}