| 31 | } |
| 32 | |
| 33 | fn main() -> Result<(), Box<dyn std::error::Error>> { |
| 34 | // Setup terminal |
| 35 | enable_raw_mode()?; |
| 36 | let mut stdout = io::stdout(); |
| 37 | execute!(stdout, EnterAlternateScreen)?; |
| 38 | let backend = CrosstermBackend::new(stdout); |
| 39 | let mut terminal = Terminal::new(backend)?; |
| 40 | |
| 41 | let mut time = 0.0_f32; |
| 42 | let mut paused = false; |
| 43 | |
| 44 | loop { |
| 45 | terminal.draw(|f| { |
| 46 | let chunks = Layout::default() |
| 47 | .direction(Direction::Vertical) |
| 48 | .constraints([Constraint::Percentage(100)]) |
| 49 | .split(f.area()); |
| 50 | |
| 51 | let sine = SineWave { frequency: 2.0 }; |
| 52 | let graph = Graph::new(&sine) |
| 53 | .x_range(time, time + 4.0) |
| 54 | .y_range(-1.5, 1.5) |
| 55 | .style(Style::default().fg(Color::Cyan)); |
| 56 | |
| 57 | let block = Block::default() |
| 58 | .title(format!( |
| 59 | "Sine Wave {} | Press 'q' to quit, Space to pause", |
| 60 | if paused { "[PAUSED]" } else { "" } |
| 61 | )) |
| 62 | .borders(Borders::ALL); |
| 63 | |
| 64 | f.render_widget(block, chunks[0]); |
| 65 | f.render_widget(graph, chunks[0].inner(ratatui::layout::Margin::new(1, 1))); |
| 66 | })?; |
| 67 | |
| 68 | if event::poll(std::time::Duration::from_millis(16))? { |
| 69 | if let Event::Key(key) = event::read()? { |
| 70 | match key.code { |
| 71 | KeyCode::Char('q') => break, |
| 72 | KeyCode::Char(' ') => paused = !paused, |
| 73 | _ => {} |
| 74 | } |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | if !paused { |
| 79 | time += 0.016; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | // Restore terminal |
| 84 | disable_raw_mode()?; |
| 85 | execute!(terminal.backend_mut(), LeaveAlternateScreen)?; |
| 86 | terminal.show_cursor()?; |
| 87 | |
| 88 | Ok(()) |
| 89 | } |
| 90 | |