Method update

examples/scrolling_plot.rs:36–62

(&mut self, message: Message, now: std::time::Instant)

impl App {
    fn update(&mut self, message: Message, now: std::time::Instant) {
        match message {
            Message::PlotMessage(plot_msg) => {
                self.widget.update(plot_msg);
            }
            Message::Tick => {
                if self.last_tick.elapsed() < Duration::from_millis(30) {
                    return;
                }
                self.last_tick = now;

                let y = (self.x * 0.5).sin();
                // Update the series
                self.widget
                    .update_series(&self.series_id, |series| {
                        // Add new point
                        series.positions.push([self.x, y]);
                        // Keep only last 300 points for scrolling effect
                        if series.positions.len() > 300 {
                            series.positions.remove(0);
                        }
                    })
                    .unwrap();
                self.x += 0.1f64;
            }
        }
    }

    fn view(&self) -> Element<'_, Message> {
        self.widget.view().map(Message::PlotMessage)