mirror of
https://github.com/ratatui-org/ratatui
synced 2024-11-22 20:53:19 +00:00
f29c73fb1c
Any iterator whose item is convertible into `Line` can now be collected into `Tabs`. In addition, where previously `Tabs::new` required a `Vec`, it can now accept any object that implements `IntoIterator` with an item type implementing `Into<Line>`. BREAKING CHANGE: Calls to `Tabs::new()` whose argument is collected from an iterator will no longer compile. For example, `Tabs::new(["a","b"].into_iter().collect())` will no longer compile, because the return type of `.collect()` can no longer be inferred to be a `Vec<_>`.
109 lines
3.1 KiB
Rust
109 lines
3.1 KiB
Rust
use std::{error::Error, io};
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use crossterm::{
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event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind},
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execute,
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terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
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};
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use ratatui::{prelude::*, widgets::*};
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struct App<'a> {
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pub titles: Vec<&'a str>,
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pub index: usize,
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}
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impl<'a> App<'a> {
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fn new() -> App<'a> {
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App {
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titles: vec!["Tab0", "Tab1", "Tab2", "Tab3"],
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index: 0,
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}
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}
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pub fn next(&mut self) {
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self.index = (self.index + 1) % self.titles.len();
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}
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pub fn previous(&mut self) {
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if self.index > 0 {
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self.index -= 1;
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} else {
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self.index = self.titles.len() - 1;
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}
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}
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}
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fn main() -> Result<(), Box<dyn Error>> {
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// setup terminal
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enable_raw_mode()?;
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let mut stdout = io::stdout();
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execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
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let backend = CrosstermBackend::new(stdout);
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let mut terminal = Terminal::new(backend)?;
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// create app and run it
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let app = App::new();
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let res = run_app(&mut terminal, app);
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// restore terminal
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disable_raw_mode()?;
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execute!(
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terminal.backend_mut(),
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LeaveAlternateScreen,
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DisableMouseCapture
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)?;
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terminal.show_cursor()?;
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if let Err(err) = res {
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println!("{err:?}");
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}
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Ok(())
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}
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fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
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loop {
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terminal.draw(|f| ui(f, &app))?;
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if let Event::Key(key) = event::read()? {
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if key.kind == KeyEventKind::Press {
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match key.code {
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KeyCode::Char('q') => return Ok(()),
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KeyCode::Right | KeyCode::Char('l') => app.next(),
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KeyCode::Left | KeyCode::Char('h') => app.previous(),
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_ => {}
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}
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}
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}
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}
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}
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fn ui(f: &mut Frame, app: &App) {
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let area = f.size();
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let vertical = Layout::vertical([Constraint::Length(3), Constraint::Min(0)]);
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let [tabs_area, inner_area] = area.split(&vertical);
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let block = Block::default().on_white().black();
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f.render_widget(block, area);
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let tabs = app
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.titles
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.iter()
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.map(|t| {
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let (first, rest) = t.split_at(1);
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Line::from(vec![first.yellow(), rest.green()])
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})
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.collect::<Tabs>()
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.block(Block::default().borders(Borders::ALL).title("Tabs"))
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.select(app.index)
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.style(Style::default().cyan().on_gray())
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.highlight_style(Style::default().bold().on_black());
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f.render_widget(tabs, tabs_area);
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let inner = match app.index {
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0 => Block::default().title("Inner 0").borders(Borders::ALL),
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1 => Block::default().title("Inner 1").borders(Borders::ALL),
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2 => Block::default().title("Inner 2").borders(Borders::ALL),
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3 => Block::default().title("Inner 3").borders(Borders::ALL),
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_ => unreachable!(),
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};
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f.render_widget(inner, inner_area);
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}
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