feat!: use crossterm as default backend

pull/555/head
Florian Dehau 3 years ago
parent 1be5cf2d90
commit 9806217a6a

@ -17,8 +17,7 @@ edition = "2018"
[badges]
[features]
default = ["termion"]
curses = ["easycurses", "pancurses"]
default = ["crossterm"]
[dependencies]
bitflags = "1.3"
@ -26,102 +25,14 @@ cassowary = "0.3"
unicode-segmentation = "1.2"
unicode-width = "0.1"
termion = { version = "1.5", optional = true }
rustbox = { version = "0.11", optional = true }
crossterm = { version = "0.20", optional = true }
easycurses = { version = "0.12.2", optional = true }
pancurses = { version = "0.16.1", optional = true, features = ["win32a"] }
crossterm = { version = "0.22", optional = true }
serde = { version = "1", "optional" = true, features = ["derive"]}
[dev-dependencies]
rand = "0.8"
argh = "0.1"
[[example]]
name = "canvas"
path = "examples/canvas.rs"
required-features = ["termion"]
[[example]]
name = "user_input"
path = "examples/user_input.rs"
required-features = ["termion"]
[[example]]
name = "gauge"
path = "examples/gauge.rs"
required-features = ["termion"]
[[example]]
name = "barchart"
path = "examples/barchart.rs"
required-features = ["termion"]
[[example]]
name = "chart"
path = "examples/chart.rs"
required-features = ["termion"]
[[example]]
name = "paragraph"
path = "examples/paragraph.rs"
required-features = ["termion"]
[[example]]
name = "list"
path = "examples/list.rs"
required-features = ["termion"]
[[example]]
name = "table"
path = "examples/table.rs"
required-features = ["termion"]
[[example]]
name = "tabs"
path = "examples/tabs.rs"
required-features = ["termion"]
[[example]]
name = "custom_widget"
path = "examples/custom_widget.rs"
required-features = ["termion"]
[[example]]
name = "layout"
path = "examples/layout.rs"
required-features = ["termion"]
[[example]]
name = "popup"
path = "examples/popup.rs"
required-features = ["termion"]
[[example]]
name = "block"
path = "examples/block.rs"
required-features = ["termion"]
[[example]]
name = "sparkline"
path = "examples/sparkline.rs"
required-features = ["termion"]
[[example]]
name = "termion_demo"
path = "examples/termion_demo.rs"
required-features = ["termion"]
[[example]]
name = "rustbox_demo"
path = "examples/rustbox_demo.rs"
required-features = ["rustbox"]
[[example]]
name = "crossterm_demo"
path = "examples/crossterm_demo.rs"
required-features = ["crossterm"]
[[example]]
name = "curses_demo"
path = "examples/curses_demo.rs"
required-features = ["curses"]

@ -6,8 +6,8 @@ source = "${CARGO_MAKE_RUST_TARGET_OS}"
default_value = "unknown"
[env.TUI_FEATURES.mapping]
linux = "serde,crossterm,termion,rustbox,curses"
macos = "serde,crossterm,termion,rustbox,curses"
linux = "serde,crossterm,termion"
macos = "serde,crossterm,termion"
windows = "serde,crossterm"
[tasks.default]
@ -66,11 +66,6 @@ args = [
]
[tasks.test]
linux_alias = "test-unix"
mac_alias = "test-unix"
windows_alias = "test-windows"
[tasks.test-unix]
command = "cargo"
args = [
"test",
@ -79,19 +74,6 @@ args = [
"${TUI_FEATURES}"
]
# Documentation tests cannot be run on Windows for now
[tasks.test-windows]
command = "cargo"
args = [
"test",
"--no-default-features",
"--features",
"${TUI_FEATURES}",
"--lib",
"--tests",
"--examples",
]
[tasks.run-example]
private = true
condition = { env_set = ["TUI_EXAMPLE_NAME", "TUI_FEATURES"] }

@ -1,15 +1,19 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
widgets::{BarChart, Block, Borders},
Terminal,
Frame, Terminal,
};
struct App<'a> {
@ -48,85 +52,111 @@ impl<'a> App<'a> {
}
}
fn update(&mut self) {
fn on_tick(&mut self) {
let value = self.data.pop().unwrap();
self.data.insert(0, value);
}
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let events = Events::new();
// App
let mut app = App::new();
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
loop {
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
let barchart = BarChart::default()
.block(Block::default().title("Data1").borders(Borders::ALL))
.data(&app.data)
.bar_width(9)
.bar_style(Style::default().fg(Color::Yellow))
.value_style(Style::default().fg(Color::Black).bg(Color::Yellow));
f.render_widget(barchart, chunks[0]);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
let chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[1]);
if let Err(err) = res {
println!("{:?}", err)
}
let barchart = BarChart::default()
.block(Block::default().title("Data2").borders(Borders::ALL))
.data(&app.data)
.bar_width(5)
.bar_gap(3)
.bar_style(Style::default().fg(Color::Green))
.value_style(
Style::default()
.bg(Color::Green)
.add_modifier(Modifier::BOLD),
);
f.render_widget(barchart, chunks[0]);
Ok(())
}
let barchart = BarChart::default()
.block(Block::default().title("Data3").borders(Borders::ALL))
.data(&app.data)
.bar_style(Style::default().fg(Color::Red))
.bar_width(7)
.bar_gap(0)
.value_style(Style::default().bg(Color::Red))
.label_style(
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::ITALIC),
);
f.render_widget(barchart, chunks[1]);
})?;
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| ui(f, &mut app))?;
match events.next()? {
Event::Input(input) => {
if input == Key::Char('q') {
break;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
Event::Tick => {
app.update();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
let barchart = BarChart::default()
.block(Block::default().title("Data1").borders(Borders::ALL))
.data(&app.data)
.bar_width(9)
.bar_style(Style::default().fg(Color::Yellow))
.value_style(Style::default().fg(Color::Black).bg(Color::Yellow));
f.render_widget(barchart, chunks[0]);
let chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[1]);
let barchart = BarChart::default()
.block(Block::default().title("Data2").borders(Borders::ALL))
.data(&app.data)
.bar_width(5)
.bar_gap(3)
.bar_style(Style::default().fg(Color::Green))
.value_style(
Style::default()
.bg(Color::Green)
.add_modifier(Modifier::BOLD),
);
f.render_widget(barchart, chunks[0]);
let barchart = BarChart::default()
.block(Block::default().title("Data3").borders(Borders::ALL))
.data(&app.data)
.bar_style(Style::default().fg(Color::Red))
.bar_width(7)
.bar_gap(0)
.value_style(Style::default().bg(Color::Red))
.label_style(
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::ITALIC),
);
f.render_widget(barchart, chunks[1]);
}

@ -1,101 +1,120 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Alignment, Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::Span,
widgets::{Block, BorderType, Borders},
Terminal,
Frame, Terminal,
};
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let events = Events::new();
// create app and run it
let res = run_app(&mut terminal);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
loop {
terminal.draw(|f| {
// Wrapping block for a group
// Just draw the block and the group on the same area and build the group
// with at least a margin of 1
let size = f.size();
// Surrounding block
let block = Block::default()
.borders(Borders::ALL)
.title("Main block with round corners")
.title_alignment(Alignment::Center)
.border_type(BorderType::Rounded);
f.render_widget(block, size);
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(4)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
// Top two inner blocks
let top_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[0]);
// Top left inner block with green background
let block = Block::default()
.title(vec![
Span::styled("With", Style::default().fg(Color::Yellow)),
Span::from(" background"),
])
.style(Style::default().bg(Color::Green));
f.render_widget(block, top_chunks[0]);
// Top right inner block with styled title aligned to the right
let block = Block::default()
.title(Span::styled(
"Styled title",
Style::default()
.fg(Color::White)
.bg(Color::Red)
.add_modifier(Modifier::BOLD),
))
.title_alignment(Alignment::Right);
f.render_widget(block, top_chunks[1]);
// Bottom two inner blocks
let bottom_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[1]);
// Bottom left block with all default borders
let block = Block::default().title("With borders").borders(Borders::ALL);
f.render_widget(block, bottom_chunks[0]);
// Bottom right block with styled left and right border
let block = Block::default()
.title("With styled borders and doubled borders")
.border_style(Style::default().fg(Color::Cyan))
.borders(Borders::LEFT | Borders::RIGHT)
.border_type(BorderType::Double);
f.render_widget(block, bottom_chunks[1]);
})?;
if let Event::Input(key) = events.next()? {
if key == Key::Char('q') {
break;
terminal.draw(ui)?;
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
}
Ok(())
}
fn ui<B: Backend>(f: &mut Frame<B>) {
// Wrapping block for a group
// Just draw the block and the group on the same area and build the group
// with at least a margin of 1
let size = f.size();
// Surrounding block
let block = Block::default()
.borders(Borders::ALL)
.title("Main block with round corners")
.title_alignment(Alignment::Center)
.border_type(BorderType::Rounded);
f.render_widget(block, size);
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(4)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
// Top two inner blocks
let top_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[0]);
// Top left inner block with green background
let block = Block::default()
.title(vec![
Span::styled("With", Style::default().fg(Color::Yellow)),
Span::from(" background"),
])
.style(Style::default().bg(Color::Green));
f.render_widget(block, top_chunks[0]);
// Top right inner block with styled title aligned to the right
let block = Block::default()
.title(Span::styled(
"Styled title",
Style::default()
.fg(Color::White)
.bg(Color::Red)
.add_modifier(Modifier::BOLD),
))
.title_alignment(Alignment::Right);
f.render_widget(block, top_chunks[1]);
// Bottom two inner blocks
let bottom_chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(chunks[1]);
// Bottom left block with all default borders
let block = Block::default().title("With borders").borders(Borders::ALL);
f.render_widget(block, bottom_chunks[0]);
// Bottom right block with styled left and right border
let block = Block::default()
.title("With styled borders and doubled borders")
.border_style(Style::default().fg(Color::Cyan))
.borders(Borders::LEFT | Borders::RIGHT)
.border_type(BorderType::Double);
f.render_widget(block, bottom_chunks[1]);
}

@ -1,11 +1,15 @@
#[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 crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout, Rect},
style::{Color, Style},
text::Span,
@ -13,7 +17,7 @@ use tui::{
canvas::{Canvas, Map, MapResolution, Rectangle},
Block, Borders,
},
Terminal,
Frame, Terminal,
};
struct App {
@ -47,7 +51,7 @@ impl App {
}
}
fn update(&mut self) {
fn on_tick(&mut self) {
if self.ball.x < self.playground.left() as f64
|| self.ball.x + self.ball.width > self.playground.right() as f64
{
@ -74,80 +78,103 @@ impl App {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let config = Config {
tick_rate: Duration::from_millis(250),
..Default::default()
};
let events = Events::with_config(config);
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
// App
let mut app = App::new();
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|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,
Span::styled("You are here", Style::default().fg(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]);
})?;
terminal.draw(|f| ui(f, &app))?;
match events.next()? {
Event::Input(input) => match input {
Key::Char('q') => {
break;
}
Key::Down => {
app.y += 1.0;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => {
return Ok(());
}
KeyCode::Down => {
app.y += 1.0;
}
KeyCode::Up => {
app.y -= 1.0;
}
KeyCode::Right => {
app.x += 1.0;
}
KeyCode::Left => {
app.x -= 1.0;
}
_ => {}
}
Key::Up => {
app.y -= 1.0;
}
Key::Right => {
app.x += 1.0;
}
Key::Left => {
app.x -= 1.0;
}
_ => {}
},
Event::Tick => {
app.update();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
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,
Span::styled("You are here", Style::default().fg(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]);
}

@ -1,20 +1,25 @@
#[allow(dead_code)]
mod util;
use crate::util::{
event::{Event, Events},
SinSignal,
use crate::util::SinSignal;
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
symbols,
text::Span,
widgets::{Axis, Block, Borders, Chart, Dataset, GraphType},
Terminal,
Frame, Terminal,
};
const DATA: [(f64, f64); 5] = [(0.0, 0.0), (1.0, 1.0), (2.0, 2.0), (3.0, 3.0), (4.0, 4.0)];
@ -51,7 +56,7 @@ impl App {
}
}
fn update(&mut self) {
fn on_tick(&mut self) {
for _ in 0..5 {
self.data1.remove(0);
}
@ -66,181 +71,208 @@ impl App {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
// App
let mut app = App::new();
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| {
let size = f.size();
let chunks = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Ratio(1, 3),
Constraint::Ratio(1, 3),
Constraint::Ratio(1, 3),
]
.as_ref(),
)
.split(size);
let x_labels = vec![
Span::styled(
format!("{}", app.window[0]),
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw(format!("{}", (app.window[0] + app.window[1]) / 2.0)),
Span::styled(
format!("{}", app.window[1]),
Style::default().add_modifier(Modifier::BOLD),
),
];
let datasets = vec![
Dataset::default()
.name("data2")
.marker(symbols::Marker::Dot)
.style(Style::default().fg(Color::Cyan))
.data(&app.data1),
Dataset::default()
.name("data3")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.data(&app.data2),
];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 1",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.labels(x_labels)
.bounds(app.window),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.labels(vec![
Span::styled("-20", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("0"),
Span::styled("20", Style::default().add_modifier(Modifier::BOLD)),
])
.bounds([-20.0, 20.0]),
);
f.render_widget(chart, chunks[0]);
let datasets = vec![Dataset::default()
.name("data")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.graph_type(GraphType::Line)
.data(&DATA)];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 2",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5.0", Style::default().add_modifier(Modifier::BOLD)),
]),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5.0", Style::default().add_modifier(Modifier::BOLD)),
]),
);
f.render_widget(chart, chunks[1]);
let datasets = vec![Dataset::default()
.name("data")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.graph_type(GraphType::Line)
.data(&DATA2)];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 3",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 50.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("25"),
Span::styled("50", Style::default().add_modifier(Modifier::BOLD)),
]),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5", Style::default().add_modifier(Modifier::BOLD)),
]),
);
f.render_widget(chart, chunks[2]);
})?;
match events.next()? {
Event::Input(input) => {
if input == Key::Char('q') {
break;
terminal.draw(|f| ui(f, &mut app))?;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
Event::Tick => {
app.update();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let size = f.size();
let chunks = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Ratio(1, 3),
Constraint::Ratio(1, 3),
Constraint::Ratio(1, 3),
]
.as_ref(),
)
.split(size);
let x_labels = vec![
Span::styled(
format!("{}", app.window[0]),
Style::default().add_modifier(Modifier::BOLD),
),
Span::raw(format!("{}", (app.window[0] + app.window[1]) / 2.0)),
Span::styled(
format!("{}", app.window[1]),
Style::default().add_modifier(Modifier::BOLD),
),
];
let datasets = vec![
Dataset::default()
.name("data2")
.marker(symbols::Marker::Dot)
.style(Style::default().fg(Color::Cyan))
.data(&app.data1),
Dataset::default()
.name("data3")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.data(&app.data2),
];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 1",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.labels(x_labels)
.bounds(app.window),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.labels(vec![
Span::styled("-20", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("0"),
Span::styled("20", Style::default().add_modifier(Modifier::BOLD)),
])
.bounds([-20.0, 20.0]),
);
f.render_widget(chart, chunks[0]);
let datasets = vec![Dataset::default()
.name("data")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.graph_type(GraphType::Line)
.data(&DATA)];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 2",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5.0", Style::default().add_modifier(Modifier::BOLD)),
]),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5.0", Style::default().add_modifier(Modifier::BOLD)),
]),
);
f.render_widget(chart, chunks[1]);
let datasets = vec![Dataset::default()
.name("data")
.marker(symbols::Marker::Braille)
.style(Style::default().fg(Color::Yellow))
.graph_type(GraphType::Line)
.data(&DATA2)];
let chart = Chart::new(datasets)
.block(
Block::default()
.title(Span::styled(
"Chart 3",
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::BOLD),
))
.borders(Borders::ALL),
)
.x_axis(
Axis::default()
.title("X Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 50.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("25"),
Span::styled("50", Style::default().add_modifier(Modifier::BOLD)),
]),
)
.y_axis(
Axis::default()
.title("Y Axis")
.style(Style::default().fg(Color::Gray))
.bounds([0.0, 5.0])
.labels(vec![
Span::styled("0", Style::default().add_modifier(Modifier::BOLD)),
Span::raw("2.5"),
Span::styled("5", Style::default().add_modifier(Modifier::BOLD)),
]),
);
f.render_widget(chart, chunks[2]);
}

@ -6,23 +6,19 @@ mod util;
use crate::demo::{ui, App};
use argh::FromArgs;
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event as CEvent, KeyCode},
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io::stdout,
sync::mpsc,
thread,
io,
time::{Duration, Instant},
};
use tui::{backend::CrosstermBackend, Terminal};
enum Event<I> {
Input(I),
Tick,
}
use tui::{
backend::{Backend, CrosstermBackend},
Terminal,
};
/// Crossterm demo
#[derive(Debug, FromArgs)]
@ -38,71 +34,64 @@ struct Cli {
fn main() -> Result<(), Box<dyn Error>> {
let cli: Cli = argh::from_env();
// setup terminal
enable_raw_mode()?;
let mut stdout = stdout();
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup input handling
let (tx, rx) = mpsc::channel();
// create app and run it
let tick_rate = Duration::from_millis(cli.tick_rate);
thread::spawn(move || {
let mut last_tick = Instant::now();
loop {
// poll for tick rate duration, if no events, sent tick event.
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if event::poll(timeout).unwrap() {
if let CEvent::Key(key) = event::read().unwrap() {
tx.send(Event::Input(key)).unwrap();
}
}
if last_tick.elapsed() >= tick_rate {
tx.send(Event::Tick).unwrap();
last_tick = Instant::now();
}
}
});
let app = App::new("Crossterm Demo", cli.enhanced_graphics);
let res = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
let mut app = App::new("Crossterm Demo", cli.enhanced_graphics);
if let Err(err) = res {
println!("{:?}", err)
}
terminal.clear()?;
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| ui::draw(f, &mut app))?;
match rx.recv()? {
Event::Input(event) => match event.code {
KeyCode::Char('q') => {
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
break;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char(c) => app.on_key(c),
KeyCode::Left => app.on_left(),
KeyCode::Up => app.on_up(),
KeyCode::Right => app.on_right(),
KeyCode::Down => app.on_down(),
_ => {}
}
KeyCode::Char(c) => app.on_key(c),
KeyCode::Left => app.on_left(),
KeyCode::Up => app.on_up(),
KeyCode::Right => app.on_right(),
KeyCode::Down => app.on_down(),
_ => {}
},
Event::Tick => {
app.on_tick();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
if app.should_quit {
break;
return Ok(());
}
}
Ok(())
}

@ -1,74 +0,0 @@
mod demo;
#[allow(dead_code)]
mod util;
use crate::demo::{ui, App};
use argh::FromArgs;
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use tui::{backend::CursesBackend, Terminal};
/// Curses demo
#[derive(Debug, FromArgs)]
struct Cli {
/// time in ms between two ticks.
#[argh(option, default = "250")]
tick_rate: u64,
/// whether unicode symbols are used to improve the overall look of the app
#[argh(option, default = "true")]
enhanced_graphics: bool,
}
fn main() -> Result<(), Box<dyn Error>> {
let cli: Cli = argh::from_env();
let mut backend =
CursesBackend::new().ok_or_else(|| io::Error::new(io::ErrorKind::Other, ""))?;
let curses = backend.get_curses_mut();
curses.set_echo(false);
curses.set_input_timeout(easycurses::TimeoutMode::WaitUpTo(50));
curses.set_input_mode(easycurses::InputMode::RawCharacter);
curses.set_keypad_enabled(true);
let mut terminal = Terminal::new(backend)?;
terminal.hide_cursor()?;
let mut app = App::new("Curses demo", cli.enhanced_graphics);
let mut last_tick = Instant::now();
let tick_rate = Duration::from_millis(cli.tick_rate);
loop {
terminal.draw(|f| ui::draw(f, &mut app))?;
if let Some(input) = terminal.backend_mut().get_curses_mut().get_input() {
match input {
easycurses::Input::Character(c) => {
app.on_key(c);
}
easycurses::Input::KeyUp => {
app.on_up();
}
easycurses::Input::KeyDown => {
app.on_down();
}
easycurses::Input::KeyLeft => {
app.on_left();
}
easycurses::Input::KeyRight => {
app.on_right();
}
_ => {}
};
};
terminal.backend_mut().get_curses_mut().flush_input();
if last_tick.elapsed() > tick_rate {
app.on_tick();
last_tick = Instant::now();
}
if app.should_quit {
break;
}
}
Ok(())
}

@ -1,11 +1,16 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend, buffer::Buffer, layout::Rect, style::Style, widgets::Widget, Terminal,
backend::{Backend, CrosstermBackend},
buffer::Buffer,
layout::Rect,
style::Style,
widgets::Widget,
Frame, Terminal,
};
struct Label<'a> {
@ -32,28 +37,47 @@ impl<'a> Label<'a> {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let res = run_app(&mut terminal);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
loop {
terminal.draw(|f| {
let size = f.size();
let label = Label::default().text("Test");
f.render_widget(label, size);
})?;
if let Event::Input(key) = events.next()? {
if key == Key::Char('q') {
break;
terminal.draw(ui)?;
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>) {
let size = f.size();
let label = Label::default().text("Test");
f.render_widget(label, size);
}

@ -1,16 +1,20 @@
#[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 crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::Span,
widgets::{Block, Borders, Gauge},
Terminal,
Frame, Terminal,
};
struct App {
@ -30,7 +34,7 @@ impl App {
}
}
fn update(&mut self) {
fn on_tick(&mut self) {
self.progress1 += 1;
if self.progress1 > 100 {
self.progress1 = 0;
@ -51,87 +55,113 @@ impl App {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::with_config(Config {
tick_rate: Duration::from_millis(100),
});
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
let mut app = App::new();
loop {
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
]
.as_ref(),
)
.split(f.size());
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
let gauge = Gauge::default()
.block(Block::default().title("Gauge1").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Yellow))
.percent(app.progress1);
f.render_widget(gauge, chunks[0]);
let label = format!("{}/100", app.progress2);
let gauge = Gauge::default()
.block(Block::default().title("Gauge2").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Magenta).bg(Color::Green))
.percent(app.progress2)
.label(label);
f.render_widget(gauge, chunks[1]);
if let Err(err) = res {
println!("{:?}", err)
}
let label = Span::styled(
format!("{:.2}%", app.progress3 * 100.0),
Style::default()
.fg(Color::Red)
.add_modifier(Modifier::ITALIC | Modifier::BOLD),
);
let gauge = Gauge::default()
.block(Block::default().title("Gauge3").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Yellow))
.ratio(app.progress3)
.label(label)
.use_unicode(true);
f.render_widget(gauge, chunks[2]);
Ok(())
}
let label = format!("{}/100", app.progress2);
let gauge = Gauge::default()
.block(Block::default().title("Gauge4"))
.gauge_style(
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::ITALIC),
)
.percent(app.progress4)
.label(label);
f.render_widget(gauge, chunks[3]);
})?;
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| ui(f, &mut app))?;
match events.next()? {
Event::Input(input) => {
if input == Key::Char('q') {
break;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
Event::Tick => {
app.update();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
]
.as_ref(),
)
.split(f.size());
let gauge = Gauge::default()
.block(Block::default().title("Gauge1").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Yellow))
.percent(app.progress1);
f.render_widget(gauge, chunks[0]);
let label = format!("{}/100", app.progress2);
let gauge = Gauge::default()
.block(Block::default().title("Gauge2").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Magenta).bg(Color::Green))
.percent(app.progress2)
.label(label);
f.render_widget(gauge, chunks[1]);
let label = Span::styled(
format!("{:.2}%", app.progress3 * 100.0),
Style::default()
.fg(Color::Red)
.add_modifier(Modifier::ITALIC | Modifier::BOLD),
);
let gauge = Gauge::default()
.block(Block::default().title("Gauge3").borders(Borders::ALL))
.gauge_style(Style::default().fg(Color::Yellow))
.ratio(app.progress3)
.label(label)
.use_unicode(true);
f.render_widget(gauge, chunks[2]);
let label = format!("{}/100", app.progress2);
let gauge = Gauge::default()
.block(Block::default().title("Gauge4"))
.gauge_style(
Style::default()
.fg(Color::Cyan)
.add_modifier(Modifier::ITALIC),
)
.percent(app.progress4)
.label(label);
f.render_widget(gauge, chunks[3]);
}

@ -1,52 +1,71 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
widgets::{Block, Borders},
Terminal,
Frame, Terminal,
};
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let res = run_app(&mut terminal);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(terminal: &mut Terminal<B>) -> io::Result<()> {
loop {
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Percentage(10),
Constraint::Percentage(80),
Constraint::Percentage(10),
]
.as_ref(),
)
.split(f.size());
let block = Block::default().title("Block").borders(Borders::ALL);
f.render_widget(block, chunks[0]);
let block = Block::default().title("Block 2").borders(Borders::ALL);
f.render_widget(block, chunks[2]);
})?;
if let Event::Input(input) = events.next()? {
if let Key::Char('q') = input {
break;
terminal.draw(|f| ui(f))?;
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.constraints(
[
Constraint::Percentage(10),
Constraint::Percentage(80),
Constraint::Percentage(10),
]
.as_ref(),
)
.split(f.size());
let block = Block::default().title("Block").borders(Borders::ALL);
f.render_widget(block, chunks[0]);
let block = Block::default().title("Block 2").borders(Borders::ALL);
f.render_widget(block, chunks[2]);
}

@ -1,19 +1,24 @@
#[allow(dead_code)]
mod util;
use crate::util::{
event::{Event, Events},
StatefulList,
use crate::util::StatefulList;
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Corner, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans},
widgets::{Block, Borders, List, ListItem},
Terminal,
Frame, Terminal,
};
/// This struct holds the current state of the app. In particular, it has the `items` field which is a wrapper
@ -90,134 +95,150 @@ impl<'a> App<'a> {
/// Rotate through the event list.
/// This only exists to simulate some kind of "progress"
fn advance(&mut self) {
fn on_tick(&mut self) {
let event = self.events.remove(0);
self.events.push(event);
}
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
// Create a new app with some example state
let mut app = App::new();
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| {
// Create two chunks with equal horizontal screen space
let chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
// Iterate through all elements in the `items` app and append some debug text to it.
let items: Vec<ListItem> = app
.items
.items
.iter()
.map(|i| {
let mut lines = vec![Spans::from(i.0)];
for _ in 0..i.1 {
lines.push(Spans::from(Span::styled(
"Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
Style::default().add_modifier(Modifier::ITALIC),
)));
}
ListItem::new(lines).style(Style::default().fg(Color::Black).bg(Color::White))
})
.collect();
// Create a List from all list items and highlight the currently selected one
let items = List::new(items)
.block(Block::default().borders(Borders::ALL).title("List"))
.highlight_style(
Style::default()
.bg(Color::LightGreen)
.add_modifier(Modifier::BOLD),
)
.highlight_symbol(">> ");
// We can now render the item list
f.render_stateful_widget(items, chunks[0], &mut app.items.state);
// Let's do the same for the events.
// The event list doesn't have any state and only displays the current state of the list.
let events: Vec<ListItem> = app
.events
.iter()
.rev()
.map(|&(event, level)| {
// Colorcode the level depending on its type
let s = match level {
"CRITICAL" => Style::default().fg(Color::Red),
"ERROR" => Style::default().fg(Color::Magenta),
"WARNING" => Style::default().fg(Color::Yellow),
"INFO" => Style::default().fg(Color::Blue),
_ => Style::default(),
};
// Add a example datetime and apply proper spacing between them
let header = Spans::from(vec![
Span::styled(format!("{:<9}", level), s),
Span::raw(" "),
Span::styled(
"2020-01-01 10:00:00",
Style::default().add_modifier(Modifier::ITALIC),
),
]);
// The event gets its own line
let log = Spans::from(vec![Span::raw(event)]);
// Here several things happen:
// 1. Add a `---` spacing line above the final list entry
// 2. Add the Level + datetime
// 3. Add a spacer line
// 4. Add the actual event
ListItem::new(vec![
Spans::from("-".repeat(chunks[1].width as usize)),
header,
Spans::from(""),
log,
])
})
.collect();
let events_list = List::new(events)
.block(Block::default().borders(Borders::ALL).title("List"))
.start_corner(Corner::BottomLeft);
f.render_widget(events_list, chunks[1]);
})?;
// This is a simple example on how to handle events
// 1. This breaks the loop and exits the program on `q` button press.
// 2. The `up`/`down` keys change the currently selected item in the App's `items` list.
// 3. `left` unselects the current item.
match events.next()? {
Event::Input(input) => match input {
Key::Char('q') => {
break;
}
Key::Left => {
app.items.unselect();
}
Key::Down => {
app.items.next();
}
Key::Up => {
app.items.previous();
terminal.draw(|f| ui(f, &mut app))?;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
KeyCode::Left => app.items.unselect(),
KeyCode::Down => app.items.next(),
KeyCode::Up => app.items.previous(),
_ => {}
}
_ => {}
},
Event::Tick => {
app.advance();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &mut App) {
// Create two chunks with equal horizontal screen space
let chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(f.size());
// Iterate through all elements in the `items` app and append some debug text to it.
let items: Vec<ListItem> = app
.items
.items
.iter()
.map(|i| {
let mut lines = vec![Spans::from(i.0)];
for _ in 0..i.1 {
lines.push(Spans::from(Span::styled(
"Lorem ipsum dolor sit amet, consectetur adipiscing elit.",
Style::default().add_modifier(Modifier::ITALIC),
)));
}
ListItem::new(lines).style(Style::default().fg(Color::Black).bg(Color::White))
})
.collect();
// Create a List from all list items and highlight the currently selected one
let items = List::new(items)
.block(Block::default().borders(Borders::ALL).title("List"))
.highlight_style(
Style::default()
.bg(Color::LightGreen)
.add_modifier(Modifier::BOLD),
)
.highlight_symbol(">> ");
// We can now render the item list
f.render_stateful_widget(items, chunks[0], &mut app.items.state);
// Let's do the same for the events.
// The event list doesn't have any state and only displays the current state of the list.
let events: Vec<ListItem> = app
.events
.iter()
.rev()
.map(|&(event, level)| {
// Colorcode the level depending on its type
let s = match level {
"CRITICAL" => Style::default().fg(Color::Red),
"ERROR" => Style::default().fg(Color::Magenta),
"WARNING" => Style::default().fg(Color::Yellow),
"INFO" => Style::default().fg(Color::Blue),
_ => Style::default(),
};
// Add a example datetime and apply proper spacing between them
let header = Spans::from(vec![
Span::styled(format!("{:<9}", level), s),
Span::raw(" "),
Span::styled(
"2020-01-01 10:00:00",
Style::default().add_modifier(Modifier::ITALIC),
),
]);
// The event gets its own line
let log = Spans::from(vec![Span::raw(event)]);
// Here several things happen:
// 1. Add a `---` spacing line above the final list entry
// 2. Add the Level + datetime
// 3. Add a spacer line
// 4. Add the actual event
ListItem::new(vec![
Spans::from("-".repeat(chunks[1].width as usize)),
header,
Spans::from(""),
log,
])
})
.collect();
let events_list = List::new(events)
.block(Block::default().borders(Borders::ALL).title("List"))
.start_corner(Corner::BottomLeft);
f.render_widget(events_list, chunks[1]);
}

@ -1,111 +1,172 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Alignment, Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans},
widgets::{Block, Borders, Paragraph, Wrap},
Terminal,
Frame, Terminal,
};
struct App {
scroll: u16,
}
impl App {
fn new() -> App {
App { scroll: 0 }
}
fn on_tick(&mut self) {
self.scroll += 1;
self.scroll %= 10;
}
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
let mut scroll: u16 = 0;
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| {
let size = f.size();
// Words made "loooong" to demonstrate line breaking.
let s = "Veeeeeeeeeeeeeeeery loooooooooooooooooong striiiiiiiiiiiiiiiiiiiiiiiiiing. ";
let mut long_line = s.repeat(usize::from(size.width) / s.len() + 4);
long_line.push('\n');
let block = Block::default()
.style(Style::default().bg(Color::White).fg(Color::Black));
f.render_widget(block, size);
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(5)
.constraints(
[
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
]
.as_ref(),
)
.split(size);
let text = vec![
Spans::from("This is a line "),
Spans::from(Span::styled("This is a line ", Style::default().fg(Color::Red))),
Spans::from(Span::styled("This is a line", Style::default().bg(Color::Blue))),
Spans::from(Span::styled(
"This is a longer line",
Style::default().add_modifier(Modifier::CROSSED_OUT),
)),
Spans::from(Span::styled(&long_line, Style::default().bg(Color::Green))),
Spans::from(Span::styled(
"This is a line",
Style::default().fg(Color::Green).add_modifier(Modifier::ITALIC),
)),
];
let create_block = |title| {
Block::default()
.borders(Borders::ALL)
.style(Style::default().bg(Color::White).fg(Color::Black))
.title(Span::styled(title, Style::default().add_modifier(Modifier::BOLD)))
};
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Left, no wrap"))
.alignment(Alignment::Left);
f.render_widget(paragraph, chunks[0]);
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Left, wrap"))
.alignment(Alignment::Left)
.wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[1]);
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Center, wrap"))
.alignment(Alignment::Center)
.wrap(Wrap { trim: true })
.scroll((scroll, 0));
f.render_widget(paragraph, chunks[2]);
let paragraph = Paragraph::new(text)
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Right, wrap"))
.alignment(Alignment::Right)
.wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[3]);
})?;
scroll += 1;
scroll %= 10;
if let Event::Input(key) = events.next()? {
if key == Key::Char('q') {
break;
terminal.draw(|f| ui(f, &mut app))?;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
Ok(())
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let size = f.size();
// Words made "loooong" to demonstrate line breaking.
let s = "Veeeeeeeeeeeeeeeery loooooooooooooooooong striiiiiiiiiiiiiiiiiiiiiiiiiing. ";
let mut long_line = s.repeat(usize::from(size.width) / s.len() + 4);
long_line.push('\n');
let block = Block::default().style(Style::default().bg(Color::White).fg(Color::Black));
f.render_widget(block, size);
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(5)
.constraints(
[
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
Constraint::Percentage(25),
]
.as_ref(),
)
.split(size);
let text = vec![
Spans::from("This is a line "),
Spans::from(Span::styled(
"This is a line ",
Style::default().fg(Color::Red),
)),
Spans::from(Span::styled(
"This is a line",
Style::default().bg(Color::Blue),
)),
Spans::from(Span::styled(
"This is a longer line",
Style::default().add_modifier(Modifier::CROSSED_OUT),
)),
Spans::from(Span::styled(&long_line, Style::default().bg(Color::Green))),
Spans::from(Span::styled(
"This is a line",
Style::default()
.fg(Color::Green)
.add_modifier(Modifier::ITALIC),
)),
];
let create_block = |title| {
Block::default()
.borders(Borders::ALL)
.style(Style::default().bg(Color::White).fg(Color::Black))
.title(Span::styled(
title,
Style::default().add_modifier(Modifier::BOLD),
))
};
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Left, no wrap"))
.alignment(Alignment::Left);
f.render_widget(paragraph, chunks[0]);
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Left, wrap"))
.alignment(Alignment::Left)
.wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[1]);
let paragraph = Paragraph::new(text.clone())
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Center, wrap"))
.alignment(Alignment::Center)
.wrap(Wrap { trim: true })
.scroll((app.scroll, 0));
f.render_widget(paragraph, chunks[2]);
let paragraph = Paragraph::new(text)
.style(Style::default().bg(Color::White).fg(Color::Black))
.block(create_block("Right, wrap"))
.alignment(Alignment::Right)
.wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[3]);
}

@ -1,20 +1,106 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Alignment, Constraint, Direction, Layout, Rect},
style::{Color, Modifier, Style},
text::{Span, Spans},
text::Span,
widgets::{Block, Borders, Clear, Paragraph, Wrap},
Terminal,
Frame, Terminal,
};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
/// helper function to create a centered rect using up
/// certain percentage of the available rect `r`
struct App {
show_popup: bool,
}
impl App {
fn new() -> App {
App { show_popup: false }
}
}
fn main() -> Result<(), Box<dyn Error>> {
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// create app and run it
let app = App::new();
let res = run_app(&mut terminal, app);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
loop {
terminal.draw(|f| ui(f, &mut app))?;
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
KeyCode::Char('p') => app.show_popup = !app.show_popup,
_ => {}
}
}
}
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let size = f.size();
let chunks = Layout::default()
.constraints([Constraint::Percentage(20), Constraint::Percentage(80)].as_ref())
.split(size);
let text = if app.show_popup {
"Press p to close the popup"
} else {
"Press p to show the popup"
};
let paragraph = Paragraph::new(Span::styled(
text,
Style::default().add_modifier(Modifier::SLOW_BLINK),
))
.alignment(Alignment::Center)
.wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[0]);
let block = Block::default()
.title("Content")
.borders(Borders::ALL)
.style(Style::default().bg(Color::Blue));
f.render_widget(block, chunks[1]);
if app.show_popup {
let block = Block::default().title("Popup").borders(Borders::ALL);
let area = centered_rect(60, 20, size);
f.render_widget(Clear, area); //this clears out the background
f.render_widget(block, area);
}
}
/// helper function to create a centered rect using up certain percentage of the available rect `r`
fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
let popup_layout = Layout::default()
.direction(Direction::Vertical)
@ -40,67 +126,3 @@ fn centered_rect(percent_x: u16, percent_y: u16, r: Rect) -> Rect {
)
.split(popup_layout[1])[1]
}
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)?;
let events = Events::new();
loop {
terminal.draw(|f| {
let size = f.size();
let chunks = Layout::default()
.direction(Direction::Horizontal)
.constraints([Constraint::Percentage(50), Constraint::Percentage(50)].as_ref())
.split(size);
let s = "Veeeeeeeeeeeeeeeery loooooooooooooooooong striiiiiiiiiiiiiiiiiiiiiiiiiing. ";
let mut long_line = s.repeat(usize::from(size.width)*usize::from(size.height)/300);
long_line.push('\n');
let text = vec![
Spans::from("This is a line "),
Spans::from(Span::styled("This is a line ", Style::default().fg(Color::Red))),
Spans::from(Span::styled("This is a line", Style::default().bg(Color::Blue))),
Spans::from(Span::styled(
"This is a longer line\n",
Style::default().add_modifier(Modifier::CROSSED_OUT),
)),
Spans::from(Span::styled(&long_line, Style::default().bg(Color::Green))),
Spans::from(Span::styled(
"This is a line\n",
Style::default().fg(Color::Green).add_modifier(Modifier::ITALIC),
)),
];
let paragraph = Paragraph::new(text.clone())
.block(Block::default().title("Left Block").borders(Borders::ALL))
.alignment(Alignment::Left).wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[0]);
let paragraph = Paragraph::new(text)
.block(Block::default().title("Right Block").borders(Borders::ALL))
.alignment(Alignment::Left).wrap(Wrap { trim: true });
f.render_widget(paragraph, chunks[1]);
let block = Block::default().title("Popup").borders(Borders::ALL);
let area = centered_rect(60, 20, size);
f.render_widget(Clear, area); //this clears out the background
f.render_widget(block, area);
})?;
if let Event::Input(input) = events.next()? {
if let Key::Char('q') = input {
break;
}
}
}
Ok(())
}

@ -1,68 +0,0 @@
mod demo;
#[allow(dead_code)]
mod util;
use crate::demo::{ui, App};
use argh::FromArgs;
use rustbox::keyboard::Key;
use std::{
error::Error,
time::{Duration, Instant},
};
use tui::{backend::RustboxBackend, Terminal};
/// Rustbox demo
#[derive(Debug, FromArgs)]
struct Cli {
/// time in ms between two ticks.
#[argh(option, default = "250")]
tick_rate: u64,
/// whether unicode symbols are used to improve the overall look of the app
#[argh(option, default = "true")]
enhanced_graphics: bool,
}
fn main() -> Result<(), Box<dyn Error>> {
let cli: Cli = argh::from_env();
let backend = RustboxBackend::new()?;
let mut terminal = Terminal::new(backend)?;
let mut app = App::new("Rustbox demo", cli.enhanced_graphics);
let mut last_tick = Instant::now();
let tick_rate = Duration::from_millis(cli.tick_rate);
loop {
terminal.draw(|f| ui::draw(f, &mut app))?;
if let Ok(rustbox::Event::KeyEvent(key)) =
terminal.backend().rustbox().peek_event(tick_rate, false)
{
match key {
Key::Char(c) => {
app.on_key(c);
}
Key::Up => {
app.on_up();
}
Key::Down => {
app.on_down();
}
Key::Left => {
app.on_left();
}
Key::Right => {
app.on_right();
}
_ => {}
}
}
if last_tick.elapsed() > tick_rate {
app.on_tick();
last_tick = Instant::now();
}
if app.should_quit {
break;
}
}
Ok(())
}

@ -1,18 +1,23 @@
#[allow(dead_code)]
mod util;
use crate::util::{
event::{Event, Events},
RandomSignal,
use crate::util::RandomSignal;
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{
error::Error,
io,
time::{Duration, Instant},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Style},
widgets::{Block, Borders, Sparkline},
Terminal,
Frame, Terminal,
};
struct App {
@ -36,7 +41,7 @@ impl App {
}
}
fn update(&mut self) {
fn on_tick(&mut self) {
let value = self.signal.next().unwrap();
self.data1.pop();
self.data1.insert(0, value);
@ -50,75 +55,101 @@ impl App {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let events = Events::new();
// create app and run it
let tick_rate = Duration::from_millis(250);
let app = App::new();
let res = run_app(&mut terminal, app, tick_rate);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
// Create default app state
let mut app = App::new();
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> io::Result<()> {
let mut last_tick = Instant::now();
loop {
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(3),
Constraint::Length(3),
Constraint::Length(7),
Constraint::Min(0),
]
.as_ref(),
)
.split(f.size());
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data1")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data1)
.style(Style::default().fg(Color::Yellow));
f.render_widget(sparkline, chunks[0]);
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data2")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data2)
.style(Style::default().bg(Color::Green));
f.render_widget(sparkline, chunks[1]);
// Multiline
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data3")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data3)
.style(Style::default().fg(Color::Red));
f.render_widget(sparkline, chunks[2]);
})?;
terminal.draw(|f| ui(f, &mut app))?;
match events.next()? {
Event::Input(input) => {
if input == Key::Char('q') {
break;
let timeout = tick_rate
.checked_sub(last_tick.elapsed())
.unwrap_or_else(|| Duration::from_secs(0));
if crossterm::event::poll(timeout)? {
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
_ => {}
}
}
Event::Tick => {
app.update();
}
}
if last_tick.elapsed() >= tick_rate {
app.on_tick();
last_tick = Instant::now();
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(3),
Constraint::Length(3),
Constraint::Length(7),
Constraint::Min(0),
]
.as_ref(),
)
.split(f.size());
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data1")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data1)
.style(Style::default().fg(Color::Yellow));
f.render_widget(sparkline, chunks[0]);
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data2")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data2)
.style(Style::default().bg(Color::Green));
f.render_widget(sparkline, chunks[1]);
// Multiline
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data3")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data3)
.style(Style::default().fg(Color::Red));
f.render_widget(sparkline, chunks[2]);
}

@ -1,25 +1,25 @@
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Layout},
style::{Color, Modifier, Style},
widgets::{Block, Borders, Cell, Row, Table, TableState},
Terminal,
Frame, Terminal,
};
pub struct StatefulTable<'a> {
struct App<'a> {
state: TableState,
items: Vec<Vec<&'a str>>,
}
impl<'a> StatefulTable<'a> {
fn new() -> StatefulTable<'a> {
StatefulTable {
impl<'a> App<'a> {
fn new() -> App<'a> {
App {
state: TableState::default(),
items: vec![
vec!["Row11", "Row12", "Row13"],
@ -74,72 +74,82 @@ impl<'a> StatefulTable<'a> {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let app = App::new();
let res = run_app(&mut terminal, app);
let mut table = StatefulTable::new();
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
// Input
loop {
terminal.draw(|f| {
let rects = Layout::default()
.constraints([Constraint::Percentage(100)].as_ref())
.margin(5)
.split(f.size());
if let Err(err) = res {
println!("{:?}", err)
}
let selected_style = Style::default().add_modifier(Modifier::REVERSED);
let normal_style = Style::default().bg(Color::Blue);
let header_cells = ["Header1", "Header2", "Header3"]
.iter()
.map(|h| Cell::from(*h).style(Style::default().fg(Color::Red)));
let header = Row::new(header_cells)
.style(normal_style)
.height(1)
.bottom_margin(1);
let rows = table.items.iter().map(|item| {
let height = item
.iter()
.map(|content| content.chars().filter(|c| *c == '\n').count())
.max()
.unwrap_or(0)
+ 1;
let cells = item.iter().map(|c| Cell::from(*c));
Row::new(cells).height(height as u16).bottom_margin(1)
});
let t = Table::new(rows)
.header(header)
.block(Block::default().borders(Borders::ALL).title("Table"))
.highlight_style(selected_style)
.highlight_symbol(">> ")
.widths(&[
Constraint::Percentage(50),
Constraint::Length(30),
Constraint::Max(10),
]);
f.render_stateful_widget(t, rects[0], &mut table.state);
})?;
Ok(())
}
if let Event::Input(key) = events.next()? {
match key {
Key::Char('q') => {
break;
}
Key::Down => {
table.next();
}
Key::Up => {
table.previous();
}
fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
loop {
terminal.draw(|f| ui(f, &mut app))?;
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
KeyCode::Down => app.next(),
KeyCode::Up => app.previous(),
_ => {}
}
};
}
}
}
Ok(())
fn ui<B: Backend>(f: &mut Frame<B>, app: &mut App) {
let rects = Layout::default()
.constraints([Constraint::Percentage(100)].as_ref())
.margin(5)
.split(f.size());
let selected_style = Style::default().add_modifier(Modifier::REVERSED);
let normal_style = Style::default().bg(Color::Blue);
let header_cells = ["Header1", "Header2", "Header3"]
.iter()
.map(|h| Cell::from(*h).style(Style::default().fg(Color::Red)));
let header = Row::new(header_cells)
.style(normal_style)
.height(1)
.bottom_margin(1);
let rows = app.items.iter().map(|item| {
let height = item
.iter()
.map(|content| content.chars().filter(|c| *c == '\n').count())
.max()
.unwrap_or(0)
+ 1;
let cells = item.iter().map(|c| Cell::from(*c));
Row::new(cells).height(height as u16).bottom_margin(1)
});
let t = Table::new(rows)
.header(header)
.block(Block::default().borders(Borders::ALL).title("Table"))
.highlight_style(selected_style)
.highlight_symbol(">> ")
.widths(&[
Constraint::Percentage(50),
Constraint::Length(30),
Constraint::Max(10),
]);
f.render_stateful_widget(t, rects[0], &mut app.state);
}

@ -1,94 +1,115 @@
#[allow(dead_code)]
mod util;
use crate::util::{
event::{Event, Events},
TabsState,
use crate::util::TabsState;
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans},
widgets::{Block, Borders, Tabs},
Terminal,
Frame, Terminal,
};
struct App<'a> {
tabs: TabsState<'a>,
}
impl<'a> App<'a> {
fn new() -> App<'a> {
App {
tabs: TabsState::new(vec!["Tab0", "Tab1", "Tab2", "Tab3"]),
}
}
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
let events = Events::new();
// create app and run it
let app = App::new();
let res = run_app(&mut terminal, app);
// App
let mut app = App {
tabs: TabsState::new(vec!["Tab0", "Tab1", "Tab2", "Tab3"]),
};
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
// Main loop
loop {
terminal.draw(|f| {
let size = f.size();
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(5)
.constraints([Constraint::Length(3), Constraint::Min(0)].as_ref())
.split(size);
if let Err(err) = res {
println!("{:?}", err)
}
Ok(())
}
let block = Block::default().style(Style::default().bg(Color::White).fg(Color::Black));
f.render_widget(block, size);
let titles = app
.tabs
.titles
.iter()
.map(|t| {
let (first, rest) = t.split_at(1);
Spans::from(vec![
Span::styled(first, Style::default().fg(Color::Yellow)),
Span::styled(rest, Style::default().fg(Color::Green)),
])
})
.collect();
let tabs = Tabs::new(titles)
.block(Block::default().borders(Borders::ALL).title("Tabs"))
.select(app.tabs.index)
.style(Style::default().fg(Color::Cyan))
.highlight_style(
Style::default()
.add_modifier(Modifier::BOLD)
.bg(Color::Black),
);
f.render_widget(tabs, chunks[0]);
let inner = match app.tabs.index {
0 => Block::default().title("Inner 0").borders(Borders::ALL),
1 => Block::default().title("Inner 1").borders(Borders::ALL),
2 => Block::default().title("Inner 2").borders(Borders::ALL),
3 => Block::default().title("Inner 3").borders(Borders::ALL),
_ => unreachable!(),
};
f.render_widget(inner, chunks[1]);
})?;
fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
loop {
terminal.draw(|f| ui(f, &mut app))?;
if let Event::Input(input) = events.next()? {
match input {
Key::Char('q') => {
break;
}
Key::Right => app.tabs.next(),
Key::Left => app.tabs.previous(),
if let Event::Key(key) = event::read()? {
match key.code {
KeyCode::Char('q') => return Ok(()),
KeyCode::Right => app.tabs.next(),
KeyCode::Left => app.tabs.previous(),
_ => {}
}
}
}
Ok(())
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let size = f.size();
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(5)
.constraints([Constraint::Length(3), Constraint::Min(0)].as_ref())
.split(size);
let block = Block::default().style(Style::default().bg(Color::White).fg(Color::Black));
f.render_widget(block, size);
let titles = app
.tabs
.titles
.iter()
.map(|t| {
let (first, rest) = t.split_at(1);
Spans::from(vec![
Span::styled(first, Style::default().fg(Color::Yellow)),
Span::styled(rest, Style::default().fg(Color::Green)),
])
})
.collect();
let tabs = Tabs::new(titles)
.block(Block::default().borders(Borders::ALL).title("Tabs"))
.select(app.tabs.index)
.style(Style::default().fg(Color::Cyan))
.highlight_style(
Style::default()
.add_modifier(Modifier::BOLD)
.bg(Color::Black),
);
f.render_widget(tabs, chunks[0]);
let inner = match app.tabs.index {
0 => Block::default().title("Inner 0").borders(Borders::ALL),
1 => Block::default().title("Inner 1").borders(Borders::ALL),
2 => Block::default().title("Inner 2").borders(Borders::ALL),
3 => Block::default().title("Inner 3").borders(Borders::ALL),
_ => unreachable!(),
};
f.render_widget(inner, chunks[1]);
}

@ -2,14 +2,19 @@ mod demo;
#[allow(dead_code)]
mod util;
use crate::{
demo::{ui, App},
util::event::{Config, Event, Events},
};
use crate::demo::{ui, App};
use argh::FromArgs;
use std::{error::Error, io, time::Duration};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{backend::TermionBackend, Terminal};
use std::{error::Error, io, sync::mpsc, thread, time::Duration};
use termion::{
event::Key,
input::{MouseTerminal, TermRead},
raw::IntoRawMode,
screen::AlternateScreen,
};
use tui::{
backend::{Backend, TermionBackend},
Terminal,
};
/// Termion demo
#[derive(Debug, FromArgs)]
@ -25,48 +30,72 @@ struct Cli {
fn main() -> Result<(), Box<dyn Error>> {
let cli: Cli = argh::from_env();
let events = Events::with_config(Config {
tick_rate: Duration::from_millis(cli.tick_rate),
..Config::default()
});
// setup terminal
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)?;
let mut app = App::new("Termion demo", cli.enhanced_graphics);
// create app and run it
let tick_rate = Duration::from_millis(cli.tick_rate);
let app = App::new("Termion demo", cli.enhanced_graphics);
run_app(&mut terminal, app, tick_rate)?;
Ok(())
}
fn run_app<B: Backend>(
terminal: &mut Terminal<B>,
mut app: App,
tick_rate: Duration,
) -> Result<(), Box<dyn Error>> {
let events = events(tick_rate);
loop {
terminal.draw(|f| ui::draw(f, &mut app))?;
match events.next()? {
match events.recv()? {
Event::Input(key) => match key {
Key::Char(c) => {
app.on_key(c);
}
Key::Up => {
app.on_up();
}
Key::Down => {
app.on_down();
}
Key::Left => {
app.on_left();
}
Key::Right => {
app.on_right();
}
Key::Char(c) => app.on_key(c),
Key::Up => app.on_up(),
Key::Down => app.on_down(),
Key::Left => app.on_left(),
Key::Right => app.on_right(),
_ => {}
},
Event::Tick => {
app.on_tick();
}
Event::Tick => app.on_tick(),
}
if app.should_quit {
break;
return Ok(());
}
}
}
Ok(())
enum Event {
Input(Key),
Tick,
}
fn events(tick_rate: Duration) -> mpsc::Receiver<Event> {
let (tx, rx) = mpsc::channel();
let keys_tx = tx.clone();
thread::spawn(move || {
let stdin = io::stdin();
for evt in stdin.keys() {
if let Ok(key) = evt {
if let Err(err) = keys_tx.send(Event::Input(key)) {
eprintln!("{}", err);
return;
}
}
}
});
thread::spawn(move || loop {
if let Err(err) = tx.send(Event::Tick) {
eprintln!("{}", err);
break;
}
thread::sleep(tick_rate);
});
rx
}

@ -9,20 +9,19 @@
/// * Pressing Backspace erases a character
/// * Pressing Enter pushes the current input in the history of previous
/// messages
#[allow(dead_code)]
mod util;
use crate::util::event::{Event, Events};
use crossterm::{
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
execute,
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use std::{error::Error, io};
use termion::{event::Key, input::MouseTerminal, raw::IntoRawMode, screen::AlternateScreen};
use tui::{
backend::TermionBackend,
backend::{Backend, CrosstermBackend},
layout::{Constraint, Direction, Layout},
style::{Color, Modifier, Style},
text::{Span, Spans, Text},
widgets::{Block, Borders, List, ListItem, Paragraph},
Terminal,
Frame, Terminal,
};
use unicode_width::UnicodeWidthStr;
@ -52,122 +51,59 @@ impl Default for App {
}
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);
// setup terminal
enable_raw_mode()?;
let mut stdout = io::stdout();
execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
let backend = CrosstermBackend::new(stdout);
let mut terminal = Terminal::new(backend)?;
// Setup event handlers
let events = Events::new();
// Create default app state
let mut app = App::default();
loop {
// Draw UI
terminal.draw(|f| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(1),
Constraint::Length(3),
Constraint::Min(1),
]
.as_ref(),
)
.split(f.size());
// create app and run it
let app = App::default();
let res = run_app(&mut terminal, app);
let (msg, style) = match app.input_mode {
InputMode::Normal => (
vec![
Span::raw("Press "),
Span::styled("q", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to exit, "),
Span::styled("e", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to start editing."),
],
Style::default().add_modifier(Modifier::RAPID_BLINK),
),
InputMode::Editing => (
vec![
Span::raw("Press "),
Span::styled("Esc", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to stop editing, "),
Span::styled("Enter", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to record the message"),
],
Style::default(),
),
};
let mut text = Text::from(Spans::from(msg));
text.patch_style(style);
let help_message = Paragraph::new(text);
f.render_widget(help_message, chunks[0]);
// restore terminal
disable_raw_mode()?;
execute!(
terminal.backend_mut(),
LeaveAlternateScreen,
DisableMouseCapture
)?;
terminal.show_cursor()?;
let input = Paragraph::new(app.input.as_ref())
.style(match app.input_mode {
InputMode::Normal => Style::default(),
InputMode::Editing => Style::default().fg(Color::Yellow),
})
.block(Block::default().borders(Borders::ALL).title("Input"));
f.render_widget(input, chunks[1]);
match app.input_mode {
InputMode::Normal =>
// Hide the cursor. `Frame` does this by default, so we don't need to do anything here
{}
if let Err(err) = res {
println!("{:?}", err)
}
InputMode::Editing => {
// Make the cursor visible and ask tui-rs to put it at the specified coordinates after rendering
f.set_cursor(
// Put cursor past the end of the input text
chunks[1].x + app.input.width() as u16 + 1,
// Move one line down, from the border to the input line
chunks[1].y + 1,
)
}
}
Ok(())
}
let messages: Vec<ListItem> = app
.messages
.iter()
.enumerate()
.map(|(i, m)| {
let content = vec![Spans::from(Span::raw(format!("{}: {}", i, m)))];
ListItem::new(content)
})
.collect();
let messages =
List::new(messages).block(Block::default().borders(Borders::ALL).title("Messages"));
f.render_widget(messages, chunks[2]);
})?;
fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
loop {
terminal.draw(|f| ui(f, &mut app))?;
// Handle input
if let Event::Input(input) = events.next()? {
if let Event::Key(key) = event::read()? {
match app.input_mode {
InputMode::Normal => match input {
Key::Char('e') => {
InputMode::Normal => match key.code {
KeyCode::Char('e') => {
app.input_mode = InputMode::Editing;
}
Key::Char('q') => {
break;
KeyCode::Char('q') => {
return Ok(());
}
_ => {}
},
InputMode::Editing => match input {
Key::Char('\n') => {
InputMode::Editing => match key.code {
KeyCode::Enter => {
app.messages.push(app.input.drain(..).collect());
}
Key::Char(c) => {
KeyCode::Char(c) => {
app.input.push(c);
}
Key::Backspace => {
KeyCode::Backspace => {
app.input.pop();
}
Key::Esc => {
KeyCode::Esc => {
app.input_mode = InputMode::Normal;
}
_ => {}
@ -175,5 +111,82 @@ fn main() -> Result<(), Box<dyn Error>> {
}
}
}
Ok(())
}
fn ui<B: Backend>(f: &mut Frame<B>, app: &App) {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(1),
Constraint::Length(3),
Constraint::Min(1),
]
.as_ref(),
)
.split(f.size());
let (msg, style) = match app.input_mode {
InputMode::Normal => (
vec![
Span::raw("Press "),
Span::styled("q", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to exit, "),
Span::styled("e", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to start editing."),
],
Style::default().add_modifier(Modifier::RAPID_BLINK),
),
InputMode::Editing => (
vec![
Span::raw("Press "),
Span::styled("Esc", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to stop editing, "),
Span::styled("Enter", Style::default().add_modifier(Modifier::BOLD)),
Span::raw(" to record the message"),
],
Style::default(),
),
};
let mut text = Text::from(Spans::from(msg));
text.patch_style(style);
let help_message = Paragraph::new(text);
f.render_widget(help_message, chunks[0]);
let input = Paragraph::new(app.input.as_ref())
.style(match app.input_mode {
InputMode::Normal => Style::default(),
InputMode::Editing => Style::default().fg(Color::Yellow),
})
.block(Block::default().borders(Borders::ALL).title("Input"));
f.render_widget(input, chunks[1]);
match app.input_mode {
InputMode::Normal =>
// Hide the cursor. `Frame` does this by default, so we don't need to do anything here
{}
InputMode::Editing => {
// Make the cursor visible and ask tui-rs to put it at the specified coordinates after rendering
f.set_cursor(
// Put cursor past the end of the input text
chunks[1].x + app.input.width() as u16 + 1,
// Move one line down, from the border to the input line
chunks[1].y + 1,
)
}
}
let messages: Vec<ListItem> = app
.messages
.iter()
.enumerate()
.map(|(i, m)| {
let content = vec![Spans::from(Span::raw(format!("{}: {}", i, m)))];
ListItem::new(content)
})
.collect();
let messages =
List::new(messages).block(Block::default().borders(Borders::ALL).title("Messages"));
f.render_widget(messages, chunks[2]);
}

@ -1,75 +0,0 @@
use std::io;
use std::sync::mpsc;
use std::thread;
use std::time::Duration;
use termion::event::Key;
use termion::input::TermRead;
pub enum Event<I> {
Input(I),
Tick,
}
/// A small event handler that wrap termion input and tick events. Each event
/// type is handled in its own thread and returned to a common `Receiver`
pub struct Events {
rx: mpsc::Receiver<Event<Key>>,
input_handle: thread::JoinHandle<()>,
tick_handle: thread::JoinHandle<()>,
}
#[derive(Debug, Clone, Copy)]
pub struct Config {
pub tick_rate: Duration,
}
impl Default for Config {
fn default() -> Config {
Config {
tick_rate: Duration::from_millis(250),
}
}
}
impl Events {
pub fn new() -> Events {
Events::with_config(Config::default())
}
pub fn with_config(config: Config) -> Events {
let (tx, rx) = mpsc::channel();
let input_handle = {
let tx = tx.clone();
thread::spawn(move || {
let stdin = io::stdin();
for evt in stdin.keys() {
if let Ok(key) = evt {
if let Err(err) = tx.send(Event::Input(key)) {
eprintln!("{}", err);
return;
}
}
}
})
};
let tick_handle = {
thread::spawn(move || loop {
if let Err(err) = tx.send(Event::Tick) {
eprintln!("{}", err);
break;
}
thread::sleep(config.tick_rate);
})
};
Events {
rx,
input_handle,
tick_handle,
}
}
pub fn next(&self) -> Result<Event<Key>, mpsc::RecvError> {
self.rx.recv()
}
}

@ -1,6 +1,3 @@
#[cfg(feature = "termion")]
pub mod event;
use rand::distributions::{Distribution, Uniform};
use rand::rngs::ThreadRng;
use tui::widgets::ListState;

@ -1,280 +0,0 @@
use std::io;
use crate::backend::Backend;
use crate::buffer::Cell;
use crate::layout::Rect;
use crate::style::{Color, Modifier};
use crate::symbols::{bar, block};
#[cfg(unix)]
use crate::symbols::{line, DOT};
#[cfg(unix)]
use pancurses::{chtype, ToChtype};
use unicode_segmentation::UnicodeSegmentation;
pub struct CursesBackend {
curses: easycurses::EasyCurses,
}
impl CursesBackend {
pub fn new() -> Option<CursesBackend> {
let curses = easycurses::EasyCurses::initialize_system()?;
Some(CursesBackend { curses })
}
pub fn with_curses(curses: easycurses::EasyCurses) -> CursesBackend {
CursesBackend { curses }
}
pub fn get_curses(&self) -> &easycurses::EasyCurses {
&self.curses
}
pub fn get_curses_mut(&mut self) -> &mut easycurses::EasyCurses {
&mut self.curses
}
}
impl Backend for CursesBackend {
fn draw<'a, I>(&mut self, content: I) -> io::Result<()>
where
I: Iterator<Item = (u16, u16, &'a Cell)>,
{
let mut last_col = 0;
let mut last_row = 0;
let mut fg = Color::Reset;
let mut bg = Color::Reset;
let mut modifier = Modifier::empty();
let mut curses_style = CursesStyle {
fg: easycurses::Color::White,
bg: easycurses::Color::Black,
};
let mut update_color = false;
for (col, row, cell) in content {
if row != last_row || col != last_col + 1 {
self.curses.move_rc(i32::from(row), i32::from(col));
}
last_col = col;
last_row = row;
if cell.modifier != modifier {
apply_modifier_diff(&mut self.curses.win, modifier, cell.modifier);
modifier = cell.modifier;
};
if cell.fg != fg {
update_color = true;
if let Some(ccolor) = cell.fg.into() {
fg = cell.fg;
curses_style.fg = ccolor;
} else {
fg = Color::White;
curses_style.fg = easycurses::Color::White;
}
};
if cell.bg != bg {
update_color = true;
if let Some(ccolor) = cell.bg.into() {
bg = cell.bg;
curses_style.bg = ccolor;
} else {
bg = Color::Black;
curses_style.bg = easycurses::Color::Black;
}
};
if update_color {
self.curses
.set_color_pair(easycurses::ColorPair::new(curses_style.fg, curses_style.bg));
};
update_color = false;
draw(&mut self.curses, cell.symbol.as_str());
}
self.curses.win.attrset(pancurses::Attribute::Normal);
self.curses.set_color_pair(easycurses::ColorPair::new(
easycurses::Color::White,
easycurses::Color::Black,
));
Ok(())
}
fn hide_cursor(&mut self) -> io::Result<()> {
self.curses
.set_cursor_visibility(easycurses::CursorVisibility::Invisible);
Ok(())
}
fn show_cursor(&mut self) -> io::Result<()> {
self.curses
.set_cursor_visibility(easycurses::CursorVisibility::Visible);
Ok(())
}
fn get_cursor(&mut self) -> io::Result<(u16, u16)> {
let (y, x) = self.curses.get_cursor_rc();
Ok((x as u16, y as u16))
}
fn set_cursor(&mut self, x: u16, y: u16) -> io::Result<()> {
self.curses.move_rc(i32::from(y), i32::from(x));
Ok(())
}
fn clear(&mut self) -> io::Result<()> {
self.curses.clear();
// self.curses.refresh();
Ok(())
}
fn size(&self) -> Result<Rect, io::Error> {
let (nrows, ncols) = self.curses.get_row_col_count();
Ok(Rect::new(0, 0, ncols as u16, nrows as u16))
}
fn flush(&mut self) -> io::Result<()> {
self.curses.refresh();
Ok(())
}
}
struct CursesStyle {
fg: easycurses::Color,
bg: easycurses::Color,
}
#[cfg(unix)]
/// Deals with lack of unicode support for ncurses on unix
fn draw(curses: &mut easycurses::EasyCurses, symbol: &str) {
for grapheme in symbol.graphemes(true) {
let ch = match grapheme {
line::TOP_RIGHT => pancurses::ACS_URCORNER(),
line::VERTICAL => pancurses::ACS_VLINE(),
line::HORIZONTAL => pancurses::ACS_HLINE(),
line::TOP_LEFT => pancurses::ACS_ULCORNER(),
line::BOTTOM_RIGHT => pancurses::ACS_LRCORNER(),
line::BOTTOM_LEFT => pancurses::ACS_LLCORNER(),
line::VERTICAL_LEFT => pancurses::ACS_RTEE(),
line::VERTICAL_RIGHT => pancurses::ACS_LTEE(),
line::HORIZONTAL_DOWN => pancurses::ACS_TTEE(),
line::HORIZONTAL_UP => pancurses::ACS_BTEE(),
block::FULL => pancurses::ACS_BLOCK(),
block::SEVEN_EIGHTHS => pancurses::ACS_BLOCK(),
block::THREE_QUARTERS => pancurses::ACS_BLOCK(),
block::FIVE_EIGHTHS => pancurses::ACS_BLOCK(),
block::HALF => pancurses::ACS_BLOCK(),
block::THREE_EIGHTHS => ' ' as chtype,
block::ONE_QUARTER => ' ' as chtype,
block::ONE_EIGHTH => ' ' as chtype,
bar::SEVEN_EIGHTHS => pancurses::ACS_BLOCK(),
bar::THREE_QUARTERS => pancurses::ACS_BLOCK(),
bar::FIVE_EIGHTHS => pancurses::ACS_BLOCK(),
bar::HALF => pancurses::ACS_BLOCK(),
bar::THREE_EIGHTHS => pancurses::ACS_S9(),
bar::ONE_QUARTER => pancurses::ACS_S9(),
bar::ONE_EIGHTH => pancurses::ACS_S9(),
DOT => pancurses::ACS_BULLET(),
unicode_char => {
if unicode_char.is_ascii() {
let mut chars = unicode_char.chars();
if let Some(ch) = chars.next() {
ch.to_chtype()
} else {
pancurses::ACS_BLOCK()
}
} else {
pancurses::ACS_BLOCK()
}
}
};
curses.win.addch(ch);
}
}
#[cfg(windows)]
fn draw(curses: &mut easycurses::EasyCurses, symbol: &str) {
for grapheme in symbol.graphemes(true) {
let ch = match grapheme {
block::SEVEN_EIGHTHS => block::FULL,
block::THREE_QUARTERS => block::FULL,
block::FIVE_EIGHTHS => block::HALF,
block::THREE_EIGHTHS => block::HALF,
block::ONE_QUARTER => block::HALF,
block::ONE_EIGHTH => " ",
bar::SEVEN_EIGHTHS => bar::FULL,
bar::THREE_QUARTERS => bar::FULL,
bar::FIVE_EIGHTHS => bar::HALF,
bar::THREE_EIGHTHS => bar::HALF,
bar::ONE_QUARTER => bar::HALF,
bar::ONE_EIGHTH => " ",
ch => ch,
};
// curses.win.addch(ch);
curses.print(ch);
}
}
impl From<Color> for Option<easycurses::Color> {
fn from(color: Color) -> Option<easycurses::Color> {
match color {
Color::Reset => None,
Color::Black => Some(easycurses::Color::Black),
Color::Red | Color::LightRed => Some(easycurses::Color::Red),
Color::Green | Color::LightGreen => Some(easycurses::Color::Green),
Color::Yellow | Color::LightYellow => Some(easycurses::Color::Yellow),
Color::Magenta | Color::LightMagenta => Some(easycurses::Color::Magenta),
Color::Cyan | Color::LightCyan => Some(easycurses::Color::Cyan),
Color::White | Color::Gray | Color::DarkGray => Some(easycurses::Color::White),
Color::Blue | Color::LightBlue => Some(easycurses::Color::Blue),
Color::Indexed(_) => None,
Color::Rgb(_, _, _) => None,
}
}
}
fn apply_modifier_diff(win: &mut pancurses::Window, from: Modifier, to: Modifier) {
remove_modifier(win, from - to);
add_modifier(win, to - from);
}
fn remove_modifier(win: &mut pancurses::Window, remove: Modifier) {
if remove.contains(Modifier::BOLD) {
win.attroff(pancurses::Attribute::Bold);
}
if remove.contains(Modifier::DIM) {
win.attroff(pancurses::Attribute::Dim);
}
if remove.contains(Modifier::ITALIC) {
win.attroff(pancurses::Attribute::Italic);
}
if remove.contains(Modifier::UNDERLINED) {
win.attroff(pancurses::Attribute::Underline);
}
if remove.contains(Modifier::SLOW_BLINK) || remove.contains(Modifier::RAPID_BLINK) {
win.attroff(pancurses::Attribute::Blink);
}
if remove.contains(Modifier::REVERSED) {
win.attroff(pancurses::Attribute::Reverse);
}
if remove.contains(Modifier::HIDDEN) {
win.attroff(pancurses::Attribute::Invisible);
}
if remove.contains(Modifier::CROSSED_OUT) {
win.attroff(pancurses::Attribute::Strikeout);
}
}
fn add_modifier(win: &mut pancurses::Window, add: Modifier) {
if add.contains(Modifier::BOLD) {
win.attron(pancurses::Attribute::Bold);
}
if add.contains(Modifier::DIM) {
win.attron(pancurses::Attribute::Dim);
}
if add.contains(Modifier::ITALIC) {
win.attron(pancurses::Attribute::Italic);
}
if add.contains(Modifier::UNDERLINED) {
win.attron(pancurses::Attribute::Underline);
}
if add.contains(Modifier::SLOW_BLINK) || add.contains(Modifier::RAPID_BLINK) {
win.attron(pancurses::Attribute::Blink);
}
if add.contains(Modifier::REVERSED) {
win.attron(pancurses::Attribute::Reverse);
}
if add.contains(Modifier::HIDDEN) {
win.attron(pancurses::Attribute::Invisible);
}
if add.contains(Modifier::CROSSED_OUT) {
win.attron(pancurses::Attribute::Strikeout);
}
}

@ -3,11 +3,6 @@ use std::io;
use crate::buffer::Cell;
use crate::layout::Rect;
#[cfg(feature = "rustbox")]
mod rustbox;
#[cfg(feature = "rustbox")]
pub use self::rustbox::RustboxBackend;
#[cfg(feature = "termion")]
mod termion;
#[cfg(feature = "termion")]
@ -18,11 +13,6 @@ mod crossterm;
#[cfg(feature = "crossterm")]
pub use self::crossterm::CrosstermBackend;
#[cfg(feature = "curses")]
mod curses;
#[cfg(feature = "curses")]
pub use self::curses::CursesBackend;
mod test;
pub use self::test::TestBackend;

@ -1,123 +0,0 @@
use crate::{
backend::Backend,
buffer::Cell,
layout::Rect,
style::{Color, Modifier},
};
use std::io;
pub struct RustboxBackend {
rustbox: rustbox::RustBox,
}
impl RustboxBackend {
pub fn new() -> Result<RustboxBackend, rustbox::InitError> {
let rustbox = rustbox::RustBox::init(Default::default())?;
Ok(RustboxBackend { rustbox })
}
pub fn with_rustbox(instance: rustbox::RustBox) -> RustboxBackend {
RustboxBackend { rustbox: instance }
}
pub fn rustbox(&self) -> &rustbox::RustBox {
&self.rustbox
}
}
impl Backend for RustboxBackend {
fn draw<'a, I>(&mut self, content: I) -> Result<(), io::Error>
where
I: Iterator<Item = (u16, u16, &'a Cell)>,
{
for (x, y, cell) in content {
self.rustbox.print(
x as usize,
y as usize,
cell.modifier.into(),
cell.fg.into(),
cell.bg.into(),
&cell.symbol,
);
}
Ok(())
}
fn hide_cursor(&mut self) -> Result<(), io::Error> {
Ok(())
}
fn show_cursor(&mut self) -> Result<(), io::Error> {
Ok(())
}
fn get_cursor(&mut self) -> io::Result<(u16, u16)> {
Err(io::Error::from(io::ErrorKind::Other))
}
fn set_cursor(&mut self, x: u16, y: u16) -> io::Result<()> {
self.rustbox.set_cursor(x as isize, y as isize);
Ok(())
}
fn clear(&mut self) -> Result<(), io::Error> {
self.rustbox.clear();
Ok(())
}
fn size(&self) -> Result<Rect, io::Error> {
let term_width = self.rustbox.width();
let term_height = self.rustbox.height();
let max = u16::max_value();
Ok(Rect::new(
0,
0,
if term_width > usize::from(max) {
max
} else {
term_width as u16
},
if term_height > usize::from(max) {
max
} else {
term_height as u16
},
))
}
fn flush(&mut self) -> Result<(), io::Error> {
self.rustbox.present();
Ok(())
}
}
fn rgb_to_byte(r: u8, g: u8, b: u8) -> u16 {
u16::from((r & 0xC0) + ((g & 0xE0) >> 2) + ((b & 0xE0) >> 5))
}
impl From<Color> for rustbox::Color {
fn from(color: Color) -> rustbox::Color {
match color {
Color::Reset => rustbox::Color::Default,
Color::Black | Color::Gray | Color::DarkGray => rustbox::Color::Black,
Color::Red | Color::LightRed => rustbox::Color::Red,
Color::Green | Color::LightGreen => rustbox::Color::Green,
Color::Yellow | Color::LightYellow => rustbox::Color::Yellow,
Color::Magenta | Color::LightMagenta => rustbox::Color::Magenta,
Color::Cyan | Color::LightCyan => rustbox::Color::Cyan,
Color::White => rustbox::Color::White,
Color::Blue | Color::LightBlue => rustbox::Color::Blue,
Color::Indexed(i) => rustbox::Color::Byte(u16::from(i)),
Color::Rgb(r, g, b) => rustbox::Color::Byte(rgb_to_byte(r, g, b)),
}
}
}
impl From<Modifier> for rustbox::Style {
fn from(modifier: Modifier) -> rustbox::Style {
let mut result = rustbox::Style::empty();
if modifier.contains(Modifier::BOLD) {
result.insert(rustbox::RB_BOLD);
}
if modifier.contains(Modifier::UNDERLINED) {
result.insert(rustbox::RB_UNDERLINE);
}
if modifier.contains(Modifier::REVERSED) {
result.insert(rustbox::RB_REVERSE);
}
result
}
}

@ -10,17 +10,17 @@
//! ```toml
//! [dependencies]
//! tui = "0.16"
//! termion = "1.5"
//! crossterm = "0.22"
//! ```
//!
//! The crate is using the `termion` backend by default but if for example you want your
//! application to work on Windows, you might want to use the `crossterm` backend instead. This can
//! be done by changing your dependencies specification to the following:
//! The crate is using the `crossterm` backend by default that works on most platforms. But if for
//! example you want to use the `termion` backend instead. This can be done by changing your
//! dependencies specification to the following:
//!
//! ```toml
//! [dependencies]
//! crossterm = "0.20"
//! tui = { version = "0.16", default-features = false, features = ['crossterm'] }
//! termion = "1.5"
//! tui = { version = "0.16", default-features = false, features = ['termion'] }
//! ```
//!
//! The same logic applies for all other available backends.
@ -33,29 +33,27 @@
//!
//! ```rust,no_run
//! use std::io;
//! use tui::Terminal;
//! use tui::backend::TermionBackend;
//! use termion::raw::IntoRawMode;
//! use tui::{backend::CrosstermBackend, Terminal};
//!
//! fn main() -> Result<(), io::Error> {
//! let stdout = io::stdout().into_raw_mode()?;
//! let backend = TermionBackend::new(stdout);
//! let stdout = io::stdout();
//! let backend = CrosstermBackend::new(stdout);
//! let mut terminal = Terminal::new(backend)?;
//! Ok(())
//! }
//! ```
//!
//! If you had previously chosen `crossterm` as a backend, the terminal can be created in a similar
//! If you had previously chosen `termion` as a backend, the terminal can be created in a similar
//! way:
//!
//! ```rust,ignore
//! use std::io;
//! use tui::Terminal;
//! use tui::backend::CrosstermBackend;
//! use tui::{backend::TermionBackend, Terminal};
//! use termion::raw::IntoRawMode;
//!
//! fn main() -> Result<(), io::Error> {
//! let stdout = io::stdout();
//! let backend = CrosstermBackend::new(stdout);
//! let stdout = io::stdout().into_raw_mode()?;
//! let backend = TermionBackend::new(stdout);
//! let mut terminal = Terminal::new(backend)?;
//! Ok(())
//! }
@ -77,17 +75,27 @@
//! The following example renders a block of the size of the terminal:
//!
//! ```rust,no_run
//! use std::io;
//! use termion::raw::IntoRawMode;
//! use tui::Terminal;
//! use tui::backend::TermionBackend;
//! use tui::widgets::{Widget, Block, Borders};
//! use tui::layout::{Layout, Constraint, Direction};
//! use std::{io, thread, time::Duration};
//! use tui::{
//! backend::CrosstermBackend,
//! widgets::{Widget, Block, Borders},
//! layout::{Layout, Constraint, Direction},
//! Terminal
//! };
//! use crossterm::{
//! event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode},
//! execute,
//! terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
//! };
//!
//! fn main() -> Result<(), io::Error> {
//! let stdout = io::stdout().into_raw_mode()?;
//! let backend = TermionBackend::new(stdout);
//! // setup terminal
//! enable_raw_mode()?;
//! let mut stdout = io::stdout();
//! execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
//! let backend = CrosstermBackend::new(stdout);
//! let mut terminal = Terminal::new(backend)?;
//!
//! terminal.draw(|f| {
//! let size = f.size();
//! let block = Block::default()
@ -95,6 +103,18 @@
//! .borders(Borders::ALL);
//! f.render_widget(block, size);
//! })?;
//!
//! thread::sleep(Duration::from_millis(5000));
//!
//! // restore terminal
//! disable_raw_mode()?;
//! execute!(
//! terminal.backend_mut(),
//! LeaveAlternateScreen,
//! DisableMouseCapture
//! )?;
//! terminal.show_cursor()?;
//!
//! Ok(())
//! }
//! ```
@ -106,39 +126,32 @@
//! full customization. And `Layout` is no exception:
//!
//! ```rust,no_run
//! use std::io;
//! use termion::raw::IntoRawMode;
//! use tui::Terminal;
//! use tui::backend::TermionBackend;
//! use tui::widgets::{Widget, Block, Borders};
//! use tui::layout::{Layout, Constraint, Direction};
//!
//! fn main() -> Result<(), io::Error> {
//! let stdout = io::stdout().into_raw_mode()?;
//! let backend = TermionBackend::new(stdout);
//! let mut terminal = Terminal::new(backend)?;
//! terminal.draw(|f| {
//! let chunks = Layout::default()
//! .direction(Direction::Vertical)
//! .margin(1)
//! .constraints(
//! [
//! Constraint::Percentage(10),
//! Constraint::Percentage(80),
//! Constraint::Percentage(10)
//! ].as_ref()
//! )
//! .split(f.size());
//! let block = Block::default()
//! .title("Block")
//! .borders(Borders::ALL);
//! f.render_widget(block, chunks[0]);
//! let block = Block::default()
//! .title("Block 2")
//! .borders(Borders::ALL);
//! f.render_widget(block, chunks[1]);
//! })?;
//! Ok(())
//! use tui::{
//! backend::Backend,
//! layout::{Constraint, Direction, Layout},
//! widgets::{Block, Borders},
//! Frame,
//! };
//! fn ui<B: Backend>(f: &mut Frame<B>) {
//! let chunks = Layout::default()
//! .direction(Direction::Vertical)
//! .margin(1)
//! .constraints(
//! [
//! Constraint::Percentage(10),
//! Constraint::Percentage(80),
//! Constraint::Percentage(10)
//! ].as_ref()
//! )
//! .split(f.size());
//! let block = Block::default()
//! .title("Block")
//! .borders(Borders::ALL);
//! f.render_widget(block, chunks[0]);
//! let block = Block::default()
//! .title("Block 2")
//! .borders(Borders::ALL);
//! f.render_widget(block, chunks[1]);
//! }
//! ```
//!

@ -82,14 +82,12 @@ where
///
/// # Examples
///
/// ```rust,no_run
/// # use std::io;
/// ```rust
/// # use tui::Terminal;
/// # use tui::backend::TermionBackend;
/// # use tui::backend::TestBackend;
/// # use tui::layout::Rect;
/// # use tui::widgets::Block;
/// # let stdout = io::stdout();
/// # let backend = TermionBackend::new(stdout);
/// # let backend = TestBackend::new(5, 5);
/// # let mut terminal = Terminal::new(backend).unwrap();
/// let block = Block::default();
/// let area = Rect::new(0, 0, 5, 5);
@ -110,14 +108,12 @@ where
///
/// # Examples
///
/// ```rust,no_run
/// # use std::io;
/// ```rust
/// # use tui::Terminal;
/// # use tui::backend::TermionBackend;
/// # use tui::backend::TestBackend;
/// # use tui::layout::Rect;
/// # use tui::widgets::{List, ListItem, ListState};
/// # let stdout = io::stdout();
/// # let backend = TermionBackend::new(stdout);
/// # let backend = TestBackend::new(5, 5);
/// # let mut terminal = Terminal::new(backend).unwrap();
/// let mut state = ListState::default();
/// state.select(Some(1));

@ -87,7 +87,7 @@ pub trait Widget {
/// ```rust,no_run
/// # use std::io;
/// # use tui::Terminal;
/// # use tui::backend::{Backend, TermionBackend};
/// # use tui::backend::{Backend, TestBackend};
/// # use tui::widgets::{Widget, List, ListItem, ListState};
///
/// // Let's say we have some events to display.
@ -154,9 +154,8 @@ pub trait Widget {
/// }
/// }
///
/// let stdout = io::stdout();
/// let backend = TermionBackend::new(stdout);
/// let mut terminal = Terminal::new(backend).unwrap();
/// # let backend = TestBackend::new(5, 5);
/// # let mut terminal = Terminal::new(backend).unwrap();
///
/// let mut events = Events::new(vec![
/// String::from("Item 1"),

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