demo.rs

#[macro_use]
extern crate log;
extern crate stderrlog;
extern crate termion;
extern crate tui;

mod util;

use std::io;
use std::thread;
use std::time;
use std::sync::mpsc;

use termion::event;
use termion::input::TermRead;

use tui::Terminal;
use tui::backend::MouseBackend;
use tui::widgets::{Axis, BarChart, Block, Borders, Chart, Dataset, Gauge, Item, List, Marker,
                   Paragraph, Row, SelectableList, Sparkline, Table, Tabs, Widget};
use tui::widgets::canvas::{Canvas, Line, Map, MapResolution};
use tui::layout::{Direction, Group, Rect, Size};
use tui::style::{Color, Modifier, Style};

use util::*;

struct Server<'a> {
    name: &'a str,
    location: &'a str,
    coords: (f64, f64),
    status: &'a str,
}

struct App<'a> {
    size: Rect,
    items: Vec<&'a str>,
    events: Vec<(&'a str, &'a str)>,
    selected: usize,
    tabs: MyTabs<'a>,
    show_chart: bool,
    progress: u16,
    data: Vec<u64>,
    data2: Vec<(f64, f64)>,
    data3: Vec<(f64, f64)>,
    data4: Vec<(&'a str, u64)>,
    window: [f64; 2],
    colors: [Color; 2],
    color_index: usize,
    servers: Vec<Server<'a>>,
}

enum Event {
    Input(event::Key),
    Tick,
}

fn main() {
    stderrlog::new()
        .module(module_path!())
        .verbosity(4)
        .init()
        .unwrap();
    info!("Start");

    let mut rand_signal = RandomSignal::new(0, 100);
    let mut sin_signal = SinSignal::new(0.2, 3.0, 18.0);
    let mut sin_signal2 = SinSignal::new(0.1, 2.0, 10.0);

    let mut app = App {
        size: Rect::default(),
        items: vec![
            "Item1", "Item2", "Item3", "Item4", "Item5", "Item6", "Item7", "Item8", "Item9",
            "Item10", "Item11", "Item12", "Item13", "Item14", "Item15", "Item16", "Item17",
            "Item18", "Item19", "Item20", "Item21", "Item22", "Item23", "Item24",
        ],
        events: vec![
            ("Event1", "INFO"),
            ("Event2", "INFO"),
            ("Event3", "CRITICAL"),
            ("Event4", "ERROR"),
            ("Event5", "INFO"),
            ("Event6", "INFO"),
            ("Event7", "WARNING"),
            ("Event8", "INFO"),
            ("Event9", "INFO"),
            ("Event10", "INFO"),
            ("Event11", "CRITICAL"),
            ("Event12", "INFO"),
            ("Event13", "INFO"),
            ("Event14", "INFO"),
            ("Event15", "INFO"),
            ("Event16", "INFO"),
            ("Event17", "ERROR"),
            ("Event18", "ERROR"),
            ("Event19", "INFO"),
            ("Event20", "INFO"),
            ("Event21", "WARNING"),
            ("Event22", "INFO"),
            ("Event23", "INFO"),
            ("Event24", "WARNING"),
            ("Event25", "INFO"),
            ("Event26", "INFO"),
        ],
        selected: 0,
        tabs: MyTabs {
            titles: vec!["Tab0", "Tab1"],
            selection: 0,
        },
        show_chart: true,
        progress: 0,
        data: rand_signal.clone().take(300).collect(),
        data2: sin_signal.clone().take(100).collect(),
        data3: sin_signal2.clone().take(200).collect(),
        data4: vec![
            ("B1", 9),
            ("B2", 12),
            ("B3", 5),
            ("B4", 8),
            ("B5", 2),
            ("B6", 4),
            ("B7", 5),
            ("B8", 9),
            ("B9", 14),
            ("B10", 15),
            ("B11", 1),
            ("B12", 0),
            ("B13", 4),
            ("B14", 6),
            ("B15", 4),
            ("B16", 6),
            ("B17", 4),
            ("B18", 7),
            ("B19", 13),
            ("B20", 8),
            ("B21", 11),
            ("B22", 9),
            ("B23", 3),
            ("B24", 5),
        ],
        window: [0.0, 20.0],
        colors: [Color::Magenta, Color::Red],
        color_index: 0,
        servers: vec![
            Server {
                name: "NorthAmerica-1",
                location: "New York City",
                coords: (40.71, -74.00),
                status: "Up",
            },
            Server {
                name: "Europe-1",
                location: "Paris",
                coords: (48.85, 2.35),
                status: "Failure",
            },
            Server {
                name: "SouthAmerica-1",
                location: "São Paulo",
                coords: (-23.54, -46.62),
                status: "Up",
            },
            Server {
                name: "Asia-1",
                location: "Singapore",
                coords: (1.35, 103.86),
                status: "Up",
            },
        ],
    };
    let (tx, rx) = mpsc::channel();
    let input_tx = tx.clone();

    for _ in 0..100 {
        sin_signal.next();
    }
    for _ in 0..200 {
        sin_signal2.next();
    }

    thread::spawn(move || {
        let stdin = io::stdin();
        for c in stdin.keys() {
            let evt = c.unwrap();
            input_tx.send(Event::Input(evt)).unwrap();
            if evt == event::Key::Char('q') {
                break;
            }
        }
    });

    thread::spawn(move || {
        let tx = tx.clone();
        loop {
            tx.send(Event::Tick).unwrap();
            thread::sleep(time::Duration::from_millis(200));
        }
    });

    let backend = MouseBackend::new().unwrap();
    let mut terminal = Terminal::new(backend).unwrap();
    terminal.clear().unwrap();
    terminal.hide_cursor().unwrap();

    loop {
        let size = terminal.size().unwrap();
        if size != app.size {
            terminal.resize(size).unwrap();
            app.size = size;
        }
        draw(&mut terminal, &app).unwrap();
        let evt = rx.recv().unwrap();
        match evt {
            Event::Input(input) => match input {
                event::Key::Char('q') => {
                    break;
                }
                event::Key::Up => {
                    if app.selected > 0 {
                        app.selected -= 1
                    };
                }
                event::Key::Down => if app.selected < app.items.len() - 1 {
                    app.selected += 1;
                },
                event::Key::Left => {
                    app.tabs.previous();
                }
                event::Key::Right => {
                    app.tabs.next();
                }
                event::Key::Char('t') => {
                    app.show_chart = !app.show_chart;
                }
                _ => {}
            },
            Event::Tick => {
                app.progress += 5;
                if app.progress > 100 {
                    app.progress = 0;
                }
                app.data.insert(0, rand_signal.next().unwrap());
                app.data.pop();
                for _ in 0..5 {
                    app.data2.remove(0);
                    app.data2.push(sin_signal.next().unwrap());
                }
                for _ in 0..10 {
                    app.data3.remove(0);
                    app.data3.push(sin_signal2.next().unwrap());
                }
                let i = app.data4.pop().unwrap();
                app.data4.insert(0, i);
                app.window[0] += 1.0;
                app.window[1] += 1.0;
                let i = app.events.pop().unwrap();
                app.events.insert(0, i);
                app.color_index += 1;
                if app.color_index >= app.colors.len() {
                    app.color_index = 0;
                }
            }
        }
    }
    terminal.show_cursor().unwrap();
    terminal.clear().unwrap();
}

fn draw(t: &mut Terminal<MouseBackend>, app: &App) -> Result<(), io::Error> {
    Group::default()
        .direction(Direction::Vertical)
        .sizes(&[Size::Fixed(3), Size::Min(0)])
        .render(t, &app.size, |t, chunks| {
            Tabs::default()
                .block(Block::default().borders(Borders::ALL).title("Tabs"))
                .titles(&app.tabs.titles)
                .style(Style::default().fg(Color::Green))
                .highlight_style(Style::default().fg(Color::Yellow))
                .select(app.tabs.selection)
                .render(t, &chunks[0]);
            match app.tabs.selection {
                0 => {
                    draw_first_tab(t, app, &chunks[1]);
                }
                1 => {
                    draw_second_tab(t, app, &chunks[1]);
                }
                _ => {}
            };
        });
    try!(t.draw());
    Ok(())
}

fn draw_first_tab(t: &mut Terminal<MouseBackend>, app: &App, area: &Rect) {
    Group::default()
        .direction(Direction::Vertical)
        .sizes(&[Size::Fixed(7), Size::Min(7), Size::Fixed(7)])
        .render(t, area, |t, chunks| {
            draw_gauges(t, app, &chunks[0]);
            draw_charts(t, app, &chunks[1]);
            draw_text(t, &chunks[2]);
        });
}

fn draw_gauges(t: &mut Terminal<MouseBackend>, app: &App, area: &Rect) {
    Block::default()
        .borders(Borders::ALL)
        .title("Graphs")
        .render(t, area);
    Group::default()
        .direction(Direction::Vertical)
        .margin(1)
        .sizes(&[Size::Fixed(2), Size::Fixed(3)])
        .render(t, area, |t, chunks| {
            Gauge::default()
                .block(Block::default().title("Gauge:"))
                .style(
                    Style::default()
                        .fg(Color::Magenta)
                        .bg(Color::Black)
                        .modifier(Modifier::Italic),
                )
                .label(&format!("{} / 100", app.progress))
                .percent(app.progress)
                .render(t, &chunks[0]);
            Sparkline::default()
                .block(Block::default().title("Sparkline:"))
                .style(Style::default().fg(Color::Green))
                .data(&app.data)
                .render(t, &chunks[1]);
        });
}

fn draw_charts(t: &mut Terminal<MouseBackend>, app: &App, area: &Rect) {
    let sizes = if app.show_chart {
        vec![Size::Percent(50), Size::Percent(50)]
    } else {
        vec![Size::Percent(100)]
    };
    Group::default()
        .direction(Direction::Horizontal)
        .sizes(&sizes)
        .render(t, area, |t, chunks| {
            Group::default()
                .direction(Direction::Vertical)
                .sizes(&[Size::Percent(50), Size::Percent(50)])
                .render(t, &chunks[0], |t, chunks| {
                    Group::default()
                        .direction(Direction::Horizontal)
                        .sizes(&[Size::Percent(50), Size::Percent(50)])
                        .render(t, &chunks[0], |t, chunks| {
                            SelectableList::default()
                                .block(Block::default().borders(Borders::ALL).title("List"))
                                .items(&app.items)
                                .select(app.selected)
                                .highlight_style(
                                    Style::default().fg(Color::Yellow).modifier(Modifier::Bold),
                                )
                                .highlight_symbol(">")
                                .render(t, &chunks[0]);
                            let info_style = Style::default().fg(Color::White);
                            let warning_style = Style::default().fg(Color::Yellow);
                            let error_style = Style::default().fg(Color::Magenta);
                            let critical_style = Style::default().fg(Color::Red);
                            let events = app.events.iter().map(|&(evt, level)| {
                                Item::StyledData(
                                    format!("{}: {}", level, evt),
                                    match level {
                                        "ERROR" => &error_style,
                                        "CRITICAL" => &critical_style,
                                        "WARNING" => &warning_style,
                                        _ => &info_style,
                                    },
                                )
                            });
                            List::new(events)
                                .block(Block::default().borders(Borders::ALL).title("List"))
                                .render(t, &chunks[1]);
                        });
                    BarChart::default()
                        .block(Block::default().borders(Borders::ALL).title("Bar chart"))
                        .data(&app.data4)
                        .bar_width(3)
                        .bar_gap(2)
                        .value_style(
                            Style::default()
                                .fg(Color::Black)
                                .bg(Color::Green)
                                .modifier(Modifier::Italic),
                        )
                        .label_style(Style::default().fg(Color::Yellow))
                        .style(Style::default().fg(Color::Green))
                        .render(t, &chunks[1]);
                });
            if app.show_chart {
                Chart::default()
                    .block(
                        Block::default()
                            .title("Chart")
                            .title_style(Style::default().fg(Color::Cyan).modifier(Modifier::Bold))
                            .borders(Borders::ALL),
                    )
                    .x_axis(
                        Axis::default()
                            .title("X Axis")
                            .style(Style::default().fg(Color::Gray))
                            .labels_style(Style::default().modifier(Modifier::Italic))
                            .bounds(app.window)
                            .labels(&[
                                &format!("{}", app.window[0]),
                                &format!("{}", (app.window[0] + app.window[1]) / 2.0),
                                &format!("{}", app.window[1]),
                            ]),
                    )
                    .y_axis(
                        Axis::default()
                            .title("Y Axis")
                            .style(Style::default().fg(Color::Gray))
                            .labels_style(Style::default().modifier(Modifier::Italic))
                            .bounds([-20.0, 20.0])
                            .labels(&["-20", "0", "20"]),
                    )
                    .datasets(&[
                        Dataset::default()
                            .name("data2")
                            .marker(Marker::Dot)
                            .style(Style::default().fg(Color::Cyan))
                            .data(&app.data2),
                        Dataset::default()
                            .name("data3")
                            .marker(Marker::Braille)
                            .style(Style::default().fg(Color::Yellow))
                            .data(&app.data3),
                    ])
                    .render(t, &chunks[1]);
            }
        });
}

fn draw_text(t: &mut Terminal<MouseBackend>, area: &Rect) {
    Paragraph::default()
        .block(
            Block::default()
                .borders(Borders::ALL)
                .title("Footer")
                .title_style(Style::default().fg(Color::Magenta).modifier(Modifier::Bold)),
        )
        .wrap(true)
        .text(
            "This is a paragraph with several lines.\nYou can change the color.\nUse \
             \\{fg=[color];bg=[color];mod=[modifier] [text]} to highlight the text with a color. \
             For example, {fg=red u}{fg=green n}{fg=yellow d}{fg=magenta e}{fg=cyan r} \
             {fg=gray t}{fg=light_gray h}{fg=light_red e} {fg=light_green r}{fg=light_yellow a} \
             {fg=light_magenta i}{fg=light_cyan n}{fg=white b}{fg=red o}{fg=green w}.\n\
             Oh, and if you didn't {mod=italic notice} you can {mod=bold automatically} \
             {mod=invert wrap} your {mod=underline text} =).\nOne more thing is that \
             it should display unicode characters properly: 日本国, ٩(-̮̮̃-̃)۶ ٩(●̮̮̃•̃)۶ ٩(͡๏̯͡๏)۶ \
             ٩(-̮̮̃•̃).",
        )
        .render(t, area);
}

fn draw_second_tab(t: &mut Terminal<MouseBackend>, app: &App, area: &Rect) {
    Group::default()
        .direction(Direction::Horizontal)
        .sizes(&[Size::Percent(30), Size::Percent(70)])
        .render(t, area, |t, chunks| {
            let up_style = Style::default().fg(Color::Green);
            let failure_style = Style::default().fg(Color::Red);
            Table::new(
                ["Server", "Location", "Status"].into_iter(),
                app.servers.iter().map(|s| {
                    let style = if s.status == "Up" {
                        &up_style
                    } else {
                        &failure_style
                    };
                    Row::StyledData(vec![s.name, s.location, s.status].into_iter(), style)
                }),
            ).block(Block::default().title("Servers").borders(Borders::ALL))
                .header_style(Style::default().fg(Color::Yellow))
                .widths(&[15, 15, 10])
                .render(t, &chunks[0]);

            Canvas::default()
                .block(Block::default().title("World").borders(Borders::ALL))
                .paint(|ctx| {
                    ctx.draw(&Map {
                        color: Color::White,
                        resolution: MapResolution::High,
                    });
                    ctx.layer();
                    for (i, s1) in app.servers.iter().enumerate() {
                        for s2 in &app.servers[i + 1..] {
                            ctx.draw(&Line {
                                x1: s1.coords.1,
                                y1: s1.coords.0,
                                y2: s2.coords.0,
                                x2: s2.coords.1,
                                color: Color::Yellow,
                            });
                        }
                    }
                    for server in &app.servers {
                        let color = if server.status == "Up" {
                            Color::Green
                        } else {
                            Color::Red
                        };
                        ctx.print(server.coords.1, server.coords.0, "X", color);
                    }
                })
                .x_bounds([-180.0, 180.0])
                .y_bounds([-90.0, 90.0])
                .render(t, &chunks[1]);
        })
}