Method new

examples/interactive_spline.rs:36–84

()

impl App {
    fn new() -> Self {
        let control_points = vec![
            [-4.0, -0.5],
            [-2.0, 1.5],
            [0.0, -1.2],
            [2.5, 1.8],
            [4.0, 0.2],
        ];

        let control_poly = Series::line_only(control_points.clone(), LineStyle::dashed(8.0))
            .with_label("control polygon")
            .with_color(Color::from_rgb(0.5, 0.5, 0.5));

        let control_series = Series::markers_only(control_points.clone(), MarkerStyle::circle(7.0))
            .with_label("control points")
            .with_color(Color::from_rgb(1.0, 0.5, 0.2));

        let spline = Series::line_only(sample_catmull_rom(&control_points, 28), LineStyle::solid())
            .with_label("catmull-rom spline")
            .with_color(Color::from_rgb(0.2, 0.8, 1.0));

        let mut controls_cfg = PlotControls::default();
        controls_cfg.unbind_drag(mouse::Button::Left);
        controls_cfg.bind_scroll(iced::keyboard::Modifiers::NONE, ScrollAction::Pan);

        let control_series_id = control_series.id;
        let control_poly_id = control_poly.id;
        let spline_series_id = spline.id;

        let widget = PlotWidgetBuilder::new()
            .with_controls(controls_cfg)
            .with_cursor_overlay(true)
            .with_x_label("x")
            .with_y_label("y")
            .add_series(control_poly)
            .add_series(spline)
            .add_series(control_series)
            .build()
            .unwrap();

        Self {
            widget,
            control_series_id,
            control_poly_id,
            spline_series_id,
            control_points,
            active_control_point: None,
        }
    }

    fn update(&mut self, message: Message) {
        const DRAG_PICK_RADIUS_WORLD: f64 = 0.5;