mirror of
https://github.com/ratatui/ratatui.git
synced 2025-09-30 14:32:01 +00:00
082cbcbc50
This change simplifys UI code that uses the Frame type. E.g.:
```rust
fn draw<B: Backend>(frame: &mut Frame<B>) {
// ...
}
```
Frame was generic over Backend because it stored a reference to the
terminal in the field. Instead it now directly stores the viewport area
and current buffer. These are provided at creation time and are valid
for the duration of the frame.
BREAKING CHANGE: Frame is no longer generic over Backend. Code that
accepted `Frame<Backend>` will now need to accept `Frame`. To migrate
existing code, remove any generic parameters from code that uses an
instance of a Frame. E.g. the above code becomes:
```rust
fn draw(frame: &mut Frame) {
// ...
}
```
278 lines
8.0 KiB
Rust
278 lines
8.0 KiB
Rust
use std::{error::Error, io, rc::Rc};
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use crossterm::{
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event::{self, Event, KeyCode},
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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::calendar::*};
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use time::{Date, Month, OffsetDateTime};
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fn main() -> Result<(), Box<dyn Error>> {
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enable_raw_mode()?;
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let mut stdout = io::stdout();
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execute!(stdout, EnterAlternateScreen)?;
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let backend = CrosstermBackend::new(stdout);
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let mut terminal = Terminal::new(backend)?;
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loop {
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let _ = terminal.draw(draw);
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if let Event::Key(key) = event::read()? {
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#[allow(clippy::single_match)]
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match key.code {
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KeyCode::Char(_) => {
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break;
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}
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_ => {}
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};
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}
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}
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disable_raw_mode()?;
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execute!(terminal.backend_mut(), LeaveAlternateScreen)?;
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terminal.show_cursor()?;
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Ok(())
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}
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fn draw(f: &mut Frame) {
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let app_area = f.size();
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let calarea = Rect {
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x: app_area.x + 1,
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y: app_area.y + 1,
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height: app_area.height - 1,
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width: app_area.width - 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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for chunk in split_rows(&calarea)
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.iter()
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.flat_map(|row| split_cols(row).to_vec())
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{
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let cal = cals::get_cal(start.month(), start.year(), &list);
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f.render_widget(cal, chunk);
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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 split_rows(area: &Rect) -> Rc<[Rect]> {
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let list_layout = Layout::default()
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.direction(Direction::Vertical)
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.margin(0)
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.constraints(
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[
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Constraint::Percentage(33),
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Constraint::Percentage(33),
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Constraint::Percentage(33),
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]
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.as_ref(),
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);
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list_layout.split(*area)
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}
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fn split_cols(area: &Rect) -> Rc<[Rect]> {
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let list_layout = Layout::default()
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.direction(Direction::Horizontal)
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.margin(0)
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.constraints(
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[
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Constraint::Percentage(25),
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Constraint::Percentage(25),
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Constraint::Percentage(25),
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Constraint::Percentage(25),
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]
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.as_ref(),
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);
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list_layout.split(*area)
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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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use super::*;
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pub(super) fn get_cal<'a, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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use Month::*;
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match m {
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May => example1(m, y, es),
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June => example2(m, y, es),
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July => example3(m, y, es),
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December => example3(m, y, es),
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February => example4(m, y, es),
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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, S: DateStyler>(m: Month, y: i32, es: S) -> Monthly<'a, S> {
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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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