tui-widget-list

This crate provides a stateful widget [ListView] implementation for Ratatui. The associated [ListState], offers functionalities such as navigating to the next and previous items. The list view support both horizontal and vertical scrolling.

Configuration

The [ListView] can be customized with the following options:

• [ListView::scroll_axis]: Specifies whether the list is vertically or horizontally scrollable.
• [ListView::scroll_padding]: Specifies whether content should remain visible while scrolling, ensuring that a specified amount of padding is preserved above/below the selected item during scrolling.
• [ListView::infinite_scrolling]: Allows the list to wrap around when scrolling past the first or last element.
• [ListView::style]: Defines the base style of the list.
• [ListView::block]: Optional outer block surrounding the list.
• [ListView::scrollbar]: Optional scrollbar widget.

Example

use ratatui::prelude::*;
use tui_widget_list::{ListBuilder, ListState, ListView};

#[derive(Debug, Clone)]
pub struct ListItem {
    text: String,
    style: Style,
}

impl ListItem {
    pub fn new<T: Into<String>>(text: T) -> Self {
        Self {
            text: text.into(),
            style: Style::default(),
        }
    }
}

impl Widget for ListItem {
    fn render(self, area: Rect, buf: &mut Buffer) {
        Line::from(self.text).style(self.style).render(area, buf);
    }
}

pub struct App {
    state: ListState,
}

impl Widget for &mut App {
    fn render(self, area: Rect, buf: &mut Buffer) {
        let builder = ListBuilder::new(|context| {
           let mut item = ListItem::new(&format!("Item {:0}", context.index));

           // Alternating styles
           if context.index % 2 == 0 {
               item.style = Style::default().bg(Color::Rgb(28, 28, 32));
           } else {
               item.style = Style::default().bg(Color::Rgb(0, 0, 0));
           }

           // Style the selected element
           if context.is_selected {
               item.style = Style::default()
                   .bg(Color::Rgb(255, 153, 0))
                   .fg(Color::Rgb(28, 28, 32));
           };

           // Return the size of the widget along the main axis.
           let main_axis_size = 1;

           (item, main_axis_size)
        });

        let item_count = 2;
        let list = ListView::new(builder, item_count);
        let state = &mut self.state;

        list.render(area, buf, state);
    }
}

Mouse handling

You can handle mouse clicks using ListState via hit_test:

match event::read()? {
    Event::Mouse(MouseEvent {
        kind: MouseEventKind::Down(MouseButton::Left),
        column, row, ..
    }) => {
        if let Some(index) = hit_test(&state, column, row) {
            state.select(Some(index));
        }
    }
    Event::Mouse(MouseEvent { kind: MouseEventKind::ScrollUp, .. }) => {
        state.previous();
    }
    Event::Mouse(MouseEvent { kind: MouseEventKind::ScrollDown, .. }) => {
        state.next();
    }
    _ => {}
}

For more examples see tui-widget-list.

Documentation

docs.rs

Demo

Infinite scrolling, scroll padding, horizontal scrolling

License: MIT