mirror of
https://github.com/ratatui-org/ratatui
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ed51c4b342
These are simple opinionated methods for creating a terminal that is
useful to use in most apps. The new init method creates a crossterm
backend writing to stdout, enables raw mode, enters the alternate
screen, and sets a panic handler that restores the terminal on panic.
A minimal hello world now looks a bit like:
```rust
use ratatui::{
crossterm::event::{self, Event},
text::Text,
Frame,
};
fn main() {
let mut terminal = ratatui::init();
loop {
terminal
.draw(|frame: &mut Frame| frame.render_widget(Text::raw("Hello World!"), frame.area()))
.expect("Failed to draw");
if matches!(event::read().expect("failed to read event"), Event::Key(_)) {
break;
}
}
ratatui::restore();
}
```
A type alias `DefaultTerminal` is added to represent this terminal
type and to simplify any cases where applications need to pass this
terminal around. It is equivalent to:
`Terminal<CrosstermBackend<Stdout>>`
We also added `ratatui::try_init()` and `try_restore()`, for situations
where you might want to handle initialization errors yourself instead
of letting the panic handler fire and cleanup. Simple Apps should
prefer the `init` and `restore` functions over these functions.
Corresponding functions to allow passing a `TerminalOptions` with
a `Viewport` (e.g. inline, fixed) are also available
(`init_with_options`,
and `try_init_with_options`).
The existing code to create a backend and terminal will remain and
is not deprecated by this approach. This just provides a simple one
line initialization using the common options.
---------
Co-authored-by: Orhun Parmaksız <orhunparmaksiz@gmail.com>
249 lines
7.8 KiB
Rust
249 lines
7.8 KiB
Rust
//! # [Ratatui] Calendar example
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//!
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//! The latest version of this example is available in the [examples] folder in the repository.
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//!
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//! Please note that the examples are designed to be run against the `main` branch of the Github
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//! repository. This means that you may not be able to compile with the latest release version on
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//! crates.io, or the one that you have installed locally.
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//!
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//! See the [examples readme] for more information on finding examples that match the version of the
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//! library you are using.
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//!
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//! [Ratatui]: https://github.com/ratatui/ratatui
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//! [examples]: https://github.com/ratatui/ratatui/blob/main/examples
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//! [examples readme]: https://github.com/ratatui/ratatui/blob/main/examples/README.md
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use color_eyre::Result;
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use ratatui::{
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crossterm::event::{self, Event, KeyCode, KeyEventKind},
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layout::{Constraint, Layout, Margin},
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style::{Color, Modifier, Style},
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widgets::calendar::{CalendarEventStore, DateStyler, Monthly},
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DefaultTerminal, Frame,
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};
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use time::{Date, Month, OffsetDateTime};
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fn main() -> Result<()> {
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color_eyre::install()?;
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let terminal = ratatui::init();
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let result = run(terminal);
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ratatui::restore();
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result
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}
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fn run(mut terminal: DefaultTerminal) -> Result<()> {
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loop {
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terminal.draw(draw)?;
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if let Event::Key(key) = event::read()? {
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if key.kind == KeyEventKind::Press && key.code == KeyCode::Char('q') {
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break Ok(());
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}
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}
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}
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}
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fn draw(frame: &mut Frame) {
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let area = frame.area().inner(Margin {
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vertical: 1,
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horizontal: 1,
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});
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let mut start = OffsetDateTime::now_local()
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.unwrap()
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.date()
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.replace_month(Month::January)
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.unwrap()
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.replace_day(1)
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.unwrap();
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let list = make_dates(start.year());
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let rows = Layout::vertical([Constraint::Ratio(1, 3); 3]).split(area);
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let cols = rows.iter().flat_map(|row| {
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Layout::horizontal([Constraint::Ratio(1, 4); 4])
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.split(*row)
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.to_vec()
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});
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for col in cols {
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let cal = cals::get_cal(start.month(), start.year(), &list);
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frame.render_widget(cal, col);
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start = start.replace_month(start.month().next()).unwrap();
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}
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}
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fn make_dates(current_year: i32) -> CalendarEventStore {
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let mut list = CalendarEventStore::today(
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Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Blue),
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);
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// Holidays
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let holiday_style = Style::default()
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.fg(Color::Red)
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.add_modifier(Modifier::UNDERLINED);
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// new year's
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list.add(
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Date::from_calendar_date(current_year, Month::January, 1).unwrap(),
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holiday_style,
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);
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// next new_year's for December "show surrounding"
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list.add(
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Date::from_calendar_date(current_year + 1, Month::January, 1).unwrap(),
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holiday_style,
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);
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// groundhog day
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list.add(
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Date::from_calendar_date(current_year, Month::February, 2).unwrap(),
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holiday_style,
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);
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// april fool's
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list.add(
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Date::from_calendar_date(current_year, Month::April, 1).unwrap(),
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holiday_style,
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);
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// earth day
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list.add(
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Date::from_calendar_date(current_year, Month::April, 22).unwrap(),
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holiday_style,
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);
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// star wars day
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list.add(
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Date::from_calendar_date(current_year, Month::May, 4).unwrap(),
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holiday_style,
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);
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// festivus
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list.add(
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Date::from_calendar_date(current_year, Month::December, 23).unwrap(),
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holiday_style,
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);
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// new year's eve
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list.add(
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Date::from_calendar_date(current_year, Month::December, 31).unwrap(),
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holiday_style,
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);
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// seasons
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let season_style = Style::default()
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.fg(Color::White)
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.bg(Color::Yellow)
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.add_modifier(Modifier::UNDERLINED);
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// spring equinox
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list.add(
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Date::from_calendar_date(current_year, Month::March, 22).unwrap(),
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season_style,
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);
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// summer solstice
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list.add(
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Date::from_calendar_date(current_year, Month::June, 21).unwrap(),
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season_style,
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);
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// fall equinox
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list.add(
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Date::from_calendar_date(current_year, Month::September, 22).unwrap(),
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season_style,
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);
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list.add(
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Date::from_calendar_date(current_year, Month::December, 21).unwrap(),
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season_style,
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);
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list
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}
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mod cals {
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#[allow(clippy::wildcard_imports)]
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use super::*;
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pub fn get_cal<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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match m {
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Month::May => example1(m, y, es),
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Month::June => example2(m, y, es),
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Month::July | Month::December => example3(m, y, es),
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Month::February => example4(m, y, es),
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Month::November => example5(m, y, es),
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_ => default(m, y, es),
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}
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}
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fn default<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_month_header(Style::default())
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.default_style(default_style)
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}
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fn example1<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_surrounding(default_style)
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.default_style(default_style)
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.show_month_header(Style::default())
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}
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fn example2<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let header_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.add_modifier(Modifier::DIM)
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.fg(Color::LightYellow);
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_weekdays_header(header_style)
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.default_style(default_style)
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.show_month_header(Style::default())
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}
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fn example3<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let header_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.fg(Color::Green);
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_surrounding(Style::default().add_modifier(Modifier::DIM))
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.show_weekdays_header(header_style)
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.default_style(default_style)
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.show_month_header(Style::default())
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}
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fn example4<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let header_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.fg(Color::Green);
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_weekdays_header(header_style)
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.default_style(default_style)
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}
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fn example5<'a, DS: DateStyler>(m: Month, y: i32, es: DS) -> Monthly<'a, DS> {
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let header_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.fg(Color::Green);
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let default_style = Style::default()
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.add_modifier(Modifier::BOLD)
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.bg(Color::Rgb(50, 50, 50));
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Monthly::new(Date::from_calendar_date(y, m, 1).unwrap(), es)
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.show_month_header(header_style)
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.default_style(default_style)
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}
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}
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