mirror of
https://github.com/ratatui/ratatui.git
synced 2025-09-30 14:32:01 +00:00
docs(examples): refactor Tabs example (#861)
- Used a few new techniques from the 0.26 features (ref widgets, text rendering, dividers / padding etc.) - Updated the app to a simpler application approach - Use color_eyre - Make it look pretty (colors, new proportional borders)  --------- Fixes https://github.com/ratatui-org/ratatui/issues/819 Co-authored-by: Josh McKinney <joshka@users.noreply.github.com>
This commit is contained in:
Emirhan TALA
GitHub
parent
5b7ad2ad82
commit
4b8e54e811
296
examples/tabs.rs
296
examples/tabs.rs
@ -13,37 +13,91 @@
|
||||
//! [examples]: https://github.com/ratatui-org/ratatui/blob/main/examples
|
||||
//! [examples readme]: https://github.com/ratatui-org/ratatui/blob/main/examples/README.md
|
||||
|
||||
use std::{error::Error, io};
|
||||
use std::{io, io::stdout};
|
||||
|
||||
use color_eyre::{config::HookBuilder, Result};
|
||||
use crossterm::{
|
||||
event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind},
|
||||
execute,
|
||||
event::{self, Event, KeyCode, KeyEventKind},
|
||||
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
|
||||
ExecutableCommand,
|
||||
};
|
||||
use ratatui::{prelude::*, style::palette::tailwind, widgets::*};
|
||||
use strum::{Display, EnumIter, FromRepr, IntoEnumIterator};
|
||||
|
||||
const PALETTES: &[tailwind::Palette] = &[
|
||||
tailwind::BLUE,
|
||||
tailwind::EMERALD,
|
||||
tailwind::INDIGO,
|
||||
tailwind::RED,
|
||||
];
|
||||
#[derive(Default)]
|
||||
struct App {
|
||||
state: AppState,
|
||||
selected_tab: SelectedTab,
|
||||
}
|
||||
|
||||
const BORDER_TYPES: &[BorderType] = &[
|
||||
BorderType::Rounded,
|
||||
BorderType::Plain,
|
||||
BorderType::Double,
|
||||
BorderType::Thick,
|
||||
];
|
||||
#[derive(Default, Clone, Copy, PartialEq, Eq)]
|
||||
enum AppState {
|
||||
#[default]
|
||||
Running,
|
||||
Quitting,
|
||||
}
|
||||
|
||||
#[derive(Default, Clone, Copy, Display, FromRepr, EnumIter)]
|
||||
enum SelectedTab {
|
||||
#[default]
|
||||
Tab0,
|
||||
#[strum(to_string = "Tab 1")]
|
||||
Tab1,
|
||||
#[strum(to_string = "Tab 2")]
|
||||
Tab2,
|
||||
#[strum(to_string = "Tab 3")]
|
||||
Tab3,
|
||||
#[strum(to_string = "Tab 4")]
|
||||
Tab4,
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
init_error_hooks()?;
|
||||
let mut terminal = init_terminal()?;
|
||||
App::default().run(&mut terminal)?;
|
||||
restore_terminal()?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
impl App {
|
||||
fn run(&mut self, terminal: &mut Terminal<impl Backend>) -> Result<()> {
|
||||
while self.state == AppState::Running {
|
||||
self.draw(terminal)?;
|
||||
self.handle_events()?;
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn draw(&self, terminal: &mut Terminal<impl Backend>) -> Result<()> {
|
||||
terminal.draw(|frame| frame.render_widget(self, frame.size()))?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn handle_events(&mut self) -> Result<(), io::Error> {
|
||||
if let Event::Key(key) = event::read()? {
|
||||
if key.kind == KeyEventKind::Press {
|
||||
use KeyCode::*;
|
||||
match key.code {
|
||||
Char('l') | Right => self.next_tab(),
|
||||
Char('h') | Left => self.previous_tab(),
|
||||
Char('q') | Esc => self.quit(),
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn next_tab(&mut self) {
|
||||
self.selected_tab = self.selected_tab.next();
|
||||
}
|
||||
|
||||
pub fn previous_tab(&mut self) {
|
||||
self.selected_tab = self.selected_tab.previous();
|
||||
}
|
||||
|
||||
pub fn quit(&mut self) {
|
||||
self.state = AppState::Quitting;
|
||||
}
|
||||
}
|
||||
|
||||
impl SelectedTab {
|
||||
@ -62,121 +116,135 @@ impl SelectedTab {
|
||||
}
|
||||
}
|
||||
|
||||
impl From<SelectedTab> for Line<'_> {
|
||||
/// Return enum name as a styled `Line` with two spaces both left and right.
|
||||
fn from(value: SelectedTab) -> Self {
|
||||
format!(" {value} ")
|
||||
.fg(tailwind::SLATE.c200)
|
||||
.bg(PALETTES[value as usize].c900)
|
||||
.into()
|
||||
}
|
||||
}
|
||||
impl Widget for &App {
|
||||
fn render(self, area: Rect, buf: &mut Buffer) {
|
||||
use Constraint::*;
|
||||
let vertical = Layout::vertical([Length(1), Min(0), Length(1)]);
|
||||
let [header_area, inner_area, footer_area] = area.split(&vertical);
|
||||
|
||||
struct App {
|
||||
pub selected_tab: SelectedTab,
|
||||
let horizontal = Layout::horizontal([Min(0), Length(20)]);
|
||||
let [tabs_area, title_area] = header_area.split(&horizontal);
|
||||
|
||||
self.render_title(title_area, buf);
|
||||
self.render_tabs(tabs_area, buf);
|
||||
self.selected_tab.render(inner_area, buf);
|
||||
self.render_footer(footer_area, buf);
|
||||
}
|
||||
}
|
||||
|
||||
impl App {
|
||||
fn new() -> App {
|
||||
App {
|
||||
selected_tab: SelectedTab::default(),
|
||||
}
|
||||
fn render_title(&self, area: Rect, buf: &mut Buffer) {
|
||||
"Ratatui Tabs Example".bold().render(area, buf);
|
||||
}
|
||||
|
||||
pub fn next(&mut self) {
|
||||
self.selected_tab = self.selected_tab.next();
|
||||
fn render_tabs(&self, area: Rect, buf: &mut Buffer) {
|
||||
let titles = SelectedTab::iter().map(|tab| tab.title());
|
||||
let highlight_style = (Color::default(), self.selected_tab.palette().c700);
|
||||
let selected_tab_index = self.selected_tab as usize;
|
||||
Tabs::new(titles)
|
||||
.highlight_style(highlight_style)
|
||||
.select(selected_tab_index)
|
||||
.padding("", "")
|
||||
.divider(" ")
|
||||
.render(area, buf);
|
||||
}
|
||||
|
||||
pub fn previous(&mut self) {
|
||||
self.selected_tab = self.selected_tab.previous();
|
||||
fn render_footer(&self, area: Rect, buf: &mut Buffer) {
|
||||
Line::raw("◄ ► to change tab | Press q to quit")
|
||||
.centered()
|
||||
.render(area, buf);
|
||||
}
|
||||
}
|
||||
|
||||
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)?;
|
||||
impl Widget for SelectedTab {
|
||||
fn render(self, area: Rect, buf: &mut Buffer) {
|
||||
// in a real app these might be separate widgets
|
||||
match self {
|
||||
SelectedTab::Tab1 => self.render_tab0(area, buf),
|
||||
SelectedTab::Tab2 => self.render_tab1(area, buf),
|
||||
SelectedTab::Tab3 => self.render_tab2(area, buf),
|
||||
SelectedTab::Tab4 => self.render_tab3(area, buf),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 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:?}");
|
||||
impl SelectedTab {
|
||||
/// Return tab's name as a styled `Line`
|
||||
fn title(&self) -> Line<'static> {
|
||||
format!(" {self} ")
|
||||
.fg(tailwind::SLATE.c200)
|
||||
.bg(self.palette().c900)
|
||||
.into()
|
||||
}
|
||||
|
||||
fn render_tab0(&self, area: Rect, buf: &mut Buffer) {
|
||||
Paragraph::new("Hello, World!")
|
||||
.block(self.block())
|
||||
.render(area, buf)
|
||||
}
|
||||
|
||||
fn render_tab1(&self, area: Rect, buf: &mut Buffer) {
|
||||
Paragraph::new("Welcome to the Ratatui tabs example!")
|
||||
.block(self.block())
|
||||
.render(area, buf)
|
||||
}
|
||||
|
||||
fn render_tab2(&self, area: Rect, buf: &mut Buffer) {
|
||||
Paragraph::new("Look! I'm different than others!")
|
||||
.block(self.block())
|
||||
.render(area, buf)
|
||||
}
|
||||
|
||||
fn render_tab3(&self, area: Rect, buf: &mut Buffer) {
|
||||
Paragraph::new("I know, these are some basic changes. But I think you got the main idea.")
|
||||
.block(self.block())
|
||||
.render(area, buf)
|
||||
}
|
||||
|
||||
/// A block surrounding the tab's content
|
||||
fn block(&self) -> Block<'static> {
|
||||
Block::default()
|
||||
.borders(Borders::ALL)
|
||||
.border_set(symbols::border::PROPORTIONAL_TALL)
|
||||
.padding(Padding::horizontal(1))
|
||||
.border_style(self.palette().c700)
|
||||
}
|
||||
|
||||
fn palette(&self) -> tailwind::Palette {
|
||||
match self {
|
||||
SelectedTab::Tab1 => tailwind::BLUE,
|
||||
SelectedTab::Tab2 => tailwind::EMERALD,
|
||||
SelectedTab::Tab3 => tailwind::INDIGO,
|
||||
SelectedTab::Tab4 => tailwind::RED,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn init_error_hooks() -> color_eyre::Result<()> {
|
||||
let (panic, error) = HookBuilder::default().into_hooks();
|
||||
let panic = panic.into_panic_hook();
|
||||
let error = error.into_eyre_hook();
|
||||
color_eyre::eyre::set_hook(Box::new(move |e| {
|
||||
let _ = restore_terminal();
|
||||
error(e)
|
||||
}))?;
|
||||
std::panic::set_hook(Box::new(move |info| {
|
||||
let _ = restore_terminal();
|
||||
panic(info)
|
||||
}));
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn run_app<B: Backend>(terminal: &mut Terminal<B>, mut app: App) -> io::Result<()> {
|
||||
loop {
|
||||
terminal.draw(|f| ui(f, &app))?;
|
||||
|
||||
if let Event::Key(key) = event::read()? {
|
||||
if key.kind == KeyEventKind::Press {
|
||||
match key.code {
|
||||
KeyCode::Char('q') | KeyCode::Esc => return Ok(()),
|
||||
KeyCode::Char('l') | KeyCode::Right => app.next(),
|
||||
KeyCode::Char('h') | KeyCode::Left => app.previous(),
|
||||
_ => {}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
fn init_terminal() -> color_eyre::Result<Terminal<impl Backend>> {
|
||||
enable_raw_mode()?;
|
||||
stdout().execute(EnterAlternateScreen)?;
|
||||
let backend = CrosstermBackend::new(stdout());
|
||||
let terminal = Terminal::new(backend)?;
|
||||
Ok(terminal)
|
||||
}
|
||||
|
||||
fn ui(f: &mut Frame, app: &App) {
|
||||
let area = f.size();
|
||||
let vertical = Layout::vertical([Constraint::Length(4), Constraint::Min(3)]);
|
||||
let [tabs_area, inner_area] = area.split(&vertical);
|
||||
|
||||
render_tabs(f, app, tabs_area);
|
||||
|
||||
render_inner(f, app, inner_area);
|
||||
}
|
||||
|
||||
fn render_tabs(f: &mut Frame, app: &App, area: Rect) {
|
||||
let block = Block::new()
|
||||
.title("Tabs Example".bold())
|
||||
.title("Use h l or ◄ ► to change tab")
|
||||
.title_alignment(Alignment::Center)
|
||||
.padding(Padding::top(1)); // padding to separate tabs from block title.
|
||||
|
||||
let selected_tab_index = app.selected_tab as usize;
|
||||
// Gets tab titles from `SelectedTab::iter()`
|
||||
let tabs = Tabs::new(SelectedTab::iter())
|
||||
.block(block)
|
||||
.highlight_style(
|
||||
Style::new()
|
||||
.bg(PALETTES[selected_tab_index].c600)
|
||||
.underlined(),
|
||||
)
|
||||
.select(selected_tab_index)
|
||||
.padding("", "")
|
||||
.divider(" | ");
|
||||
|
||||
f.render_widget(tabs, area);
|
||||
}
|
||||
|
||||
fn render_inner(f: &mut Frame, app: &App, area: Rect) {
|
||||
let index = app.selected_tab as usize;
|
||||
let inner_block = Block::default()
|
||||
.title(format!("Inner {index}"))
|
||||
.borders(Borders::ALL)
|
||||
.border_type(BORDER_TYPES[index])
|
||||
.border_style(Style::new().fg(PALETTES[index].c600));
|
||||
|
||||
f.render_widget(inner_block, area);
|
||||
fn restore_terminal() -> color_eyre::Result<()> {
|
||||
disable_raw_mode()?;
|
||||
stdout().execute(LeaveAlternateScreen)?;
|
||||
Ok(())
|
||||
}
|
||||
|
||||
@ -3,13 +3,13 @@
|
||||
Output "target/tabs.gif"
|
||||
Set Theme "Aardvark Blue"
|
||||
Set Width 1200
|
||||
Set Height 332
|
||||
Set Height 368
|
||||
Hide
|
||||
Type "cargo run --example=tabs --features=crossterm"
|
||||
Enter
|
||||
Sleep 1s
|
||||
Sleep 2s
|
||||
Show
|
||||
Sleep 1s
|
||||
Right@1s 3
|
||||
Left@1s 3
|
||||
Sleep 1s
|
||||
Right@2.5s 3
|
||||
Left@2.5s 3
|
||||
Sleep 2s
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user