2024-01-13 02:11:15 +00:00
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use std::{error::Error, io};
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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 itertools::Itertools;
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use ratatui::{layout::Constraint::*, prelude::*, widgets::*};
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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)?;
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let backend = CrosstermBackend::new(stdout);
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let mut terminal = Terminal::new(backend)?;
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2024-01-14 17:10:12 +00:00
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// Each line in the example is a layout
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// There is on average 4 row per example
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// 4 row * 7 example = 28
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// Plus additional layout for tabs ...
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// Examples might also grow in a very near future
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Layout::init_cache(50);
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2024-01-13 02:11:15 +00:00
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// create app and run it
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let res = run_app(&mut terminal);
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// restore terminal
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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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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>) -> io::Result<()> {
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let mut selection = ExampleSelection::Fixed;
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loop {
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terminal.draw(|f| f.render_widget(selection, f.size()))?;
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if let Event::Key(key) = event::read()? {
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use KeyCode::*;
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match key.code {
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Char('q') => break Ok(()),
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Char('j') | Char('l') | Down | Right => {
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selection = selection.next();
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}
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Char('k') | Char('h') | Up | Left => {
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selection = selection.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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#[derive(Debug, Copy, Clone)]
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enum ExampleSelection {
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Fixed,
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Length,
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Percentage,
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Ratio,
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Proportional,
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Min,
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Max,
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}
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impl ExampleSelection {
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fn previous(&self) -> Self {
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use ExampleSelection::*;
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match *self {
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Fixed => Fixed,
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Length => Fixed,
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Percentage => Length,
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Ratio => Percentage,
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Proportional => Ratio,
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Min => Proportional,
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Max => Min,
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}
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}
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fn next(&self) -> Self {
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use ExampleSelection::*;
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match *self {
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Fixed => Length,
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Length => Percentage,
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Percentage => Ratio,
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Ratio => Proportional,
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Proportional => Min,
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Min => Max,
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Max => Max,
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}
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}
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fn selected(&self) -> usize {
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use ExampleSelection::*;
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match self {
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Fixed => 0,
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Length => 1,
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Percentage => 2,
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Ratio => 3,
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Proportional => 4,
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Min => 5,
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Max => 6,
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}
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}
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}
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impl Widget for ExampleSelection {
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fn render(self, area: Rect, buf: &mut Buffer) {
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let [tabs, area] = area.split(&Layout::vertical([Fixed(3), Proportional(0)]));
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let [area, _] = area.split(&Layout::horizontal([Fixed(80), Proportional(0)]));
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self.render_tabs(tabs, buf);
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match self {
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ExampleSelection::Fixed => self.render_fixed_example(area, buf),
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ExampleSelection::Length => self.render_length_example(area, buf),
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ExampleSelection::Percentage => self.render_percentage_example(area, buf),
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ExampleSelection::Ratio => self.render_ratio_example(area, buf),
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ExampleSelection::Proportional => self.render_proportional_example(area, buf),
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ExampleSelection::Min => self.render_min_example(area, buf),
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ExampleSelection::Max => self.render_max_example(area, buf),
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}
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}
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}
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impl ExampleSelection {
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fn render_tabs(&self, area: Rect, buf: &mut Buffer) {
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// ┌Constraints───────────────────────────────────────────────────────────────────┐
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// │ Fixed │ Length │ Percentage │ Ratio │ Proportional │ Min │ Max │
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// └──────────────────────────────────────────────────────────────────────────────┘
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Tabs::new(
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[
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ExampleSelection::Fixed,
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ExampleSelection::Length,
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ExampleSelection::Percentage,
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ExampleSelection::Ratio,
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ExampleSelection::Proportional,
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ExampleSelection::Min,
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ExampleSelection::Max,
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]
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.iter()
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.map(|e| format!("{:?}", e)),
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)
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.block(Block::bordered().title("Constraints"))
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.highlight_style(Style::default().yellow())
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.select(self.selected())
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.padding(" ", " ")
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.render(area, buf);
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}
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fn render_fixed_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, _] = area.split(&Layout::vertical([Fixed(8); 3]));
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// Fixed(40), Proportional(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌──────────────────────────────────────┐┌────────┐
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// │ 40 px ││ 10 px │
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// └──────────────────────────────────────┘└────────┘
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Example::new([Fixed(40), Proportional(0)]).render(example1, buf);
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// Fixed(20), Fixed(20), Proportional(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌──────────────────┐┌──────────────────┐┌────────┐
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// │ 20 px ││ 20 px ││ 10 px │
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// └──────────────────┘└──────────────────┘└────────┘
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Example::new([Fixed(20), Fixed(20), Proportional(0)]).render(example2, buf);
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}
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fn render_length_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, example3, example4, _] =
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area.split(&Layout::vertical([Fixed(8); 5]));
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// Length(20), Fixed(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────┐┌──────────────────┐
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// │ 30 px ││ 20 px │
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// └────────────────────────────┘└──────────────────┘
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Example::new([Length(20), Fixed(20)]).render(example1, buf);
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// Length(20), Length(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌──────────────────┐┌────────────────────────────┐
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// │ 20 px ││ 30 px │
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// └──────────────────┘└────────────────────────────┘
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Example::new([Length(20), Length(20)]).render(example2, buf);
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// Length(20), Min(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌──────────────────┐┌────────────────────────────┐
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// │ 20 px ││ 30 px │
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// └──────────────────┘└────────────────────────────┘
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Example::new([Length(20), Min(20)]).render(example3, buf);
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// Length(20), Max(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────┐┌──────────────────┐
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// │ 30 px ││ 20 px │
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// └────────────────────────────┘└──────────────────┘
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Example::new([Length(20), Max(20)]).render(example4, buf);
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}
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fn render_percentage_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, example3, example4, example5, _] =
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area.split(&Layout::vertical([Fixed(8); 6]));
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// Percentage(75), Proportional(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────────────────────────┐
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// │ 50 px │
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// └────────────────────────────────────────────────┘
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//
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Example::new([Percentage(75), Proportional(0)]).render(example1, buf);
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// Percentage(25), Proportional(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────────────────────────┐
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// │ 50 px │
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// └────────────────────────────────────────────────┘
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Example::new([Percentage(25), Proportional(0)]).render(example2, buf);
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// Percentage(50), Min(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────────────────┐┌───────────────────────┐
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// │ 25 px ││ 25 px │
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// └───────────────────────┘└───────────────────────┘
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Example::new([Percentage(50), Min(20)]).render(example3, buf);
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// Percentage(0), Max(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────────────────────────┐
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// │ 50 px │
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// └────────────────────────────────────────────────┘
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Example::new([Percentage(0), Max(0)]).render(example4, buf);
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// Percentage(0), Proportional(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────────────────────────┐
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// │ 50 px │
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// └────────────────────────────────────────────────┘
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Example::new([Percentage(0), Proportional(0)]).render(example5, buf);
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}
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fn render_ratio_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, example3, example4, _] =
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area.split(&Layout::vertical([Fixed(8); 5]));
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// Ratio(1, 2), Ratio(1, 2)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────────────────┐┌───────────────────────┐
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// │ 25 px ││ 25 px │
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// └───────────────────────┘└───────────────────────┘
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Example::new([Ratio(1, 2); 2]).render(example1, buf);
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// Ratio(1, 4), Ratio(1, 4), Ratio(1, 4), Ratio(1, 4)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────┐┌──────────┐┌───────────┐┌──────────┐
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// │ 13 px ││ 12 px ││ 13 px ││ 12 px │
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// └───────────┘└──────────┘└───────────┘└──────────┘
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Example::new([Ratio(1, 4); 4]).render(example2, buf);
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// Ratio(1, 2), Ratio(1, 3), Ratio(1, 4)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────────────────┐┌───────────────┐┌──────┐
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// │ 25 px ││ 17 px ││ 8 px │
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// └───────────────────────┘└───────────────┘└──────┘
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Example::new([Ratio(1, 2), Ratio(1, 3), Ratio(1, 4)]).render(example3, buf);
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// Ratio(1, 2), Percentage(25), Length(10)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────────────────┐┌───────────┐┌──────────┐
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// │ 25 px ││ 13 px ││ 12 px │
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// └───────────────────────┘└───────────┘└──────────┘
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Example::new([Ratio(1, 2), Percentage(25), Length(10)]).render(example4, buf);
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}
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fn render_proportional_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, _] = area.split(&Layout::vertical([Fixed(8); 3]));
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// Proportional(1), Proportional(2), Proportional(3)
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//
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// <---------------------50 px---------------------->
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//
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// ┌──────┐┌───────────────┐┌───────────────────────┐
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// │ 8 px ││ 17 px ││ 25 px │
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// └──────┘└───────────────┘└───────────────────────┘
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Example::new([Proportional(1), Proportional(2), Proportional(3)]).render(example1, buf);
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// Proportional(1), Percentage(50), Proportional(1)
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//
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// <---------------------50 px---------------------->
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//
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// ┌───────────┐┌───────────────────────┐┌──────────┐
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// │ 13 px ││ 25 px ││ 12 px │
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// └───────────┘└───────────────────────┘└──────────┘
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Example::new([Proportional(1), Percentage(50), Proportional(1)]).render(example2, buf);
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}
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fn render_min_example(&self, area: Rect, buf: &mut Buffer) {
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let [example1, example2, example3, example4, example5, _] =
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area.split(&Layout::vertical([Fixed(8); 6]));
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// Percentage(100), Min(0)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────────────────────────┐
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// │ 50 px │
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// └────────────────────────────────────────────────┘
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Example::new([Percentage(100), Min(0)]).render(example1, buf);
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// Percentage(100), Min(20)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────────────────────────┐┌──────────────────┐
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// │ 30 px ││ 20 px │
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// └────────────────────────────┘└──────────────────┘
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Example::new([Percentage(100), Min(20)]).render(example2, buf);
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// Percentage(100), Min(40)
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//
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// <---------------------50 px---------------------->
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//
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// ┌────────┐┌──────────────────────────────────────┐
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// │ 10 px ││ 40 px │
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// └────────┘└──────────────────────────────────────┘
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Example::new([Percentage(100), Min(40)]).render(example3, buf);
|
|
|
|
|
|
|
|
// Percentage(100), Min(60)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────────────────────────┐
|
|
|
|
// │ 50 px │
|
|
|
|
// └────────────────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(100), Min(60)]).render(example4, buf);
|
|
|
|
|
|
|
|
// Percentage(100), Min(80)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────────────────────────┐
|
|
|
|
// │ 50 px │
|
|
|
|
// └────────────────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(100), Min(80)]).render(example5, buf);
|
|
|
|
}
|
|
|
|
|
|
|
|
fn render_max_example(&self, area: Rect, buf: &mut Buffer) {
|
|
|
|
let [example1, example2, example3, example4, example5, _] =
|
|
|
|
area.split(&Layout::vertical([Fixed(8); 6]));
|
|
|
|
|
|
|
|
// Percentage(0), Max(0)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────────────────────────┐
|
|
|
|
// │ 50 px │
|
|
|
|
// └────────────────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(0), Max(0)]).render(example1, buf);
|
|
|
|
|
|
|
|
//
|
|
|
|
// Percentage(0), Max(20)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────┐┌──────────────────┐
|
|
|
|
// │ 30 px ││ 20 px │
|
|
|
|
// └────────────────────────────┘└──────────────────┘
|
|
|
|
Example::new([Percentage(0), Max(20)]).render(example2, buf);
|
|
|
|
|
|
|
|
// Percentage(0), Max(40)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────┐┌──────────────────────────────────────┐
|
|
|
|
// │ 10 px ││ 40 px │
|
|
|
|
// └────────┘└──────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(0), Max(40)]).render(example3, buf);
|
|
|
|
|
|
|
|
// Percentage(0), Max(60)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────────────────────────┐
|
|
|
|
// │ 50 px │
|
|
|
|
// └────────────────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(0), Max(60)]).render(example4, buf);
|
|
|
|
|
|
|
|
// Percentage(0), Max(80)
|
|
|
|
//
|
|
|
|
// <---------------------50 px---------------------->
|
|
|
|
//
|
|
|
|
// ┌────────────────────────────────────────────────┐
|
|
|
|
// │ 50 px │
|
|
|
|
// └────────────────────────────────────────────────┘
|
|
|
|
Example::new([Percentage(0), Max(80)]).render(example5, buf);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
struct Example {
|
|
|
|
constraints: Vec<Constraint>,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Example {
|
|
|
|
fn new<C>(constraints: C) -> Self
|
|
|
|
where
|
|
|
|
C: Into<Vec<Constraint>>,
|
|
|
|
{
|
|
|
|
Self {
|
|
|
|
constraints: constraints.into(),
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Widget for Example {
|
|
|
|
fn render(self, area: Rect, buf: &mut Buffer) {
|
|
|
|
let [title, legend, area] = area.split(&Layout::vertical([Ratio(1, 3); 3]));
|
|
|
|
let blocks = Layout::horizontal(&self.constraints).split(area);
|
|
|
|
|
|
|
|
self.heading().render(title, buf);
|
|
|
|
|
|
|
|
self.legend(legend.width as usize).render(legend, buf);
|
|
|
|
|
|
|
|
for (i, block) in blocks.iter().enumerate() {
|
|
|
|
let text = format!("{} px", block.width);
|
|
|
|
let fg = Color::Indexed(i as u8 + 1);
|
|
|
|
self.illustration(text, fg).render(*block, buf);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Example {
|
|
|
|
fn heading(&self) -> Paragraph {
|
|
|
|
// Renders the following
|
|
|
|
//
|
|
|
|
// Fixed(40), Proportional(0)
|
|
|
|
let spans = self.constraints.iter().enumerate().map(|(i, c)| {
|
|
|
|
let color = Color::Indexed(i as u8 + 1);
|
|
|
|
Span::styled(format!("{:?}", c), color)
|
|
|
|
});
|
|
|
|
let heading =
|
|
|
|
Line::from(Itertools::intersperse(spans, Span::raw(", ")).collect::<Vec<Span>>());
|
|
|
|
Paragraph::new(heading).block(Block::default().padding(Padding::vertical(1)))
|
|
|
|
}
|
|
|
|
|
|
|
|
fn legend(&self, width: usize) -> Paragraph {
|
|
|
|
// a bar like `<----- 80 px ----->`
|
|
|
|
let width_label = format!("{} px", width);
|
|
|
|
let width_bar = format!(
|
|
|
|
"<{width_label:-^width$}>",
|
|
|
|
width = width - width_label.len() / 2
|
|
|
|
);
|
|
|
|
Paragraph::new(width_bar.dark_gray()).alignment(Alignment::Center)
|
|
|
|
}
|
|
|
|
|
|
|
|
fn illustration(&self, text: String, fg: Color) -> Paragraph {
|
|
|
|
// Renders the following
|
|
|
|
//
|
|
|
|
// ┌─────────┐┌─────────┐
|
|
|
|
// │ 40 px ││ 40 px │
|
|
|
|
// └─────────┘└─────────┘
|
|
|
|
Paragraph::new(text)
|
|
|
|
.alignment(Alignment::Center)
|
|
|
|
.block(Block::bordered().style(Style::default().fg(fg)))
|
|
|
|
}
|
|
|
|
}
|