ratatui

# Ratatui (Rust TUI) Immediate-mode terminal UI framework for Rust using Crossterm backend. ## When to Use - Creating a new TUI application from scratch in Rust - Adding an interactive terminal interface to an existing CLI tool - Implementing tabbed navigation, lists, tables, or charts in the terminal - High-performance terminal rendering where latency matters (e.g., monitoring dashboards) **Keywords**: TUI, terminal UI, ratatui, crossterm, interactive CLI, dashboard, ncurses alternative ## Workflow 1. **Add dependencies** to `Cargo.toml` (ratatui + crossterm) 2. **Define App state struct** — holds all mutable data (selected index, input buffer, etc.) 3. **Initialize terminal** — enable raw mode, enter alternate screen 4. **Main event loop** — `terminal.draw(|f| ui(f, &app))` + `event::poll` + key handler 5. **Build UI function** — `Layout::split` → assign chunks → `render_widget` per chunk 6. **Teardown** — disable raw mode, leave alternate screen on exit or panic ## Dependencies ```toml [dependencies] ratatui = "0.28" crossterm = "0.28" ``` ## Basic Application ```rust use crossterm::{ event::{self, Event, KeyCode}, execute, terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen}, }; use ratatui::{backend::CrosstermBackend, widgets::{Block, Borders, Paragraph}, Terminal}; use std::io; struct App { counter: i32, } impl App { fn new() -> App { App { counter: 0 } } fn on_key(&mut self, key: KeyC...