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

#[derive(Default)]
struct App {
    states: Vec<throbber_widgets_tui::ThrobberState>,
}

impl App {
    fn on_tick(&mut self) {
        self.states.iter_mut().for_each(|state| state.calc_next());
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // setup terminal
    ratatui::crossterm::terminal::enable_raw_mode()?;
    let mut stdout = std::io::stdout();
    ratatui::crossterm::execute!(
        stdout,
        ratatui::crossterm::terminal::EnterAlternateScreen,
        ratatui::crossterm::event::EnableMouseCapture
    )?;
    let backend = ratatui::backend::CrosstermBackend::new(stdout);
    let mut terminal = ratatui::Terminal::new(backend)?;

    // create app and run it
    let tick_rate = std::time::Duration::from_millis(250);
    let app = App::default();
    let res = run_app(&mut terminal, app, tick_rate);

    // restore terminal
    ratatui::crossterm::terminal::disable_raw_mode()?;
    ratatui::crossterm::execute!(
        terminal.backend_mut(),
        ratatui::crossterm::terminal::LeaveAlternateScreen,
        ratatui::crossterm::event::DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    if let Err(err) = res {
        println!("{:?}", err)
    }

    Ok(())
}

fn run_app<B: ratatui::backend::Backend>(
    terminal: &mut ratatui::Terminal<B>,
    mut app: App,
    tick_rate: std::time::Duration,
) -> std::io::Result<()> {
    let mut last_tick = std::time::Instant::now();
    loop {
        terminal.draw(|f| ui(f, &mut app))?;

        let timeout = tick_rate
            .checked_sub(last_tick.elapsed())
            .unwrap_or_else(|| std::time::Duration::from_secs(0));
        if ratatui::crossterm::event::poll(timeout)? {
            if let ratatui::crossterm::event::Event::Key(key) = ratatui::crossterm::event::read()? {
                if let ratatui::crossterm::event::KeyCode::Char('q') = key.code {
                    return Ok(());
                }
            }
        }
        if last_tick.elapsed() >= tick_rate {
            app.on_tick();
            last_tick = std::time::Instant::now();
        }
    }
}
fn ui(f: &mut ratatui::Frame, app: &mut App) {
    let all_sets = [
        ("ASCII", throbber_widgets_tui::ASCII),
        ("BOX_DRAWING", throbber_widgets_tui::BOX_DRAWING),
        ("ARROW", throbber_widgets_tui::ARROW),
        ("DOUBLE_ARROW", throbber_widgets_tui::DOUBLE_ARROW),
        ("VERTICAL_BLOCK", throbber_widgets_tui::VERTICAL_BLOCK),
        ("HORIZONTAL_BLOCK", throbber_widgets_tui::HORIZONTAL_BLOCK),
        ("QUADRANT_BLOCK", throbber_widgets_tui::QUADRANT_BLOCK),
        (
            "QUADRANT_BLOCK_CRACK",
            throbber_widgets_tui::QUADRANT_BLOCK_CRACK,
        ),
        ("WHITE_SQUARE", throbber_widgets_tui::WHITE_SQUARE),
        ("WHITE_CIRCLE", throbber_widgets_tui::WHITE_CIRCLE),
        ("BLACK_CIRCLE", throbber_widgets_tui::BLACK_CIRCLE),
        ("CLOCK", throbber_widgets_tui::CLOCK),
        ("BRAILLE_ONE", throbber_widgets_tui::BRAILLE_ONE),
        ("BRAILLE_SIX", throbber_widgets_tui::BRAILLE_SIX),
        ("BRAILLE_EIGHT", throbber_widgets_tui::BRAILLE_EIGHT),
        ("BRAILLE_DOUBLE", throbber_widgets_tui::BRAILLE_DOUBLE),
        (
            "BRAILLE_SIX_DOUBLE",
            throbber_widgets_tui::BRAILLE_SIX_DOUBLE,
        ),
        (
            "BRAILLE_EIGHT_DOUBLE",
            throbber_widgets_tui::BRAILLE_EIGHT_DOUBLE,
        ),
        ("OGHAM_A", throbber_widgets_tui::OGHAM_A),
        ("OGHAM_B", throbber_widgets_tui::OGHAM_B),
        ("OGHAM_C", throbber_widgets_tui::OGHAM_C),
        ("PARENTHESIS", throbber_widgets_tui::PARENTHESIS),
        ("CANADIAN", throbber_widgets_tui::CANADIAN),
    ];
    let horizontal_num = 4;
    // why +1? because the first line is for title default throbber.
    let vertical_num = 1 + (all_sets.len() + horizontal_num - 1) / horizontal_num;
    let verticals = ratatui::layout::Layout::default()
        .direction(ratatui::layout::Direction::Vertical)
        .constraints(&vec![ratatui::layout::Constraint::Length(1); vertical_num])
        .split(f.area());
    let default_throbber = throbber_widgets_tui::Throbber::default()
        .label("Press q to exit. This line is a default throbber (random step). The followings are incremental step.")
        .style(ratatui::style::Style::default().fg(ratatui::style::Color::Yellow));
    f.render_widget(default_throbber, verticals[0]);

    let mut chunks: Option<_> = None;
    for (i, kvp) in all_sets.iter().enumerate() {
        let (name, set) = kvp;
        let row = i / horizontal_num;
        let col = i % horizontal_num;
        if col == 0 {
            chunks = Some(
                ratatui::layout::Layout::default()
                    .direction(ratatui::layout::Direction::Horizontal)
                    .constraints(&vec![
                        ratatui::layout::Constraint::Percentage(
                            100 / (horizontal_num as u16)
                        );
                        horizontal_num
                    ])
                    .split(verticals[row + 1]),
            );
        }
        if app.states.len() <= i {
            app.states
                .push(throbber_widgets_tui::ThrobberState::default());
        }
        let throbber = throbber_widgets_tui::Throbber::default()
            .label(name.to_string())
            .throbber_set(set.clone());
        f.render_stateful_widget(throbber, chunks.clone().unwrap()[col], &mut app.states[i]);
    }
}