Method draw_frame

src/pie.rs:302–340

Draws the current animation frame. If [time] is `null`, draws the last frame (i.e. no animation).

(&self, ctx: &C, time: Option<i64>)

    ///
    /// If [time] is `null`, draws the last frame (i.e. no animation).
    fn draw_frame(&self, ctx: &C, time: Option<i64>) {
        // clear surface
        self.base.draw_frame(ctx, time);

        self.draw_axes_and_grid(ctx);

        let mut percent = self.base.calculate_percent(time);

        if percent >= 1.0 {
            percent = 1.0;

            // Update the visibility states of all channel before the last frame.
            let mut channels = self.base.channels.borrow_mut();
            for channel in channels.iter_mut() {
                if channel.state == Visibility::Showing {
                    channel.state = Visibility::Shown;
                } else if channel.state == Visibility::Hiding {
                    channel.state = Visibility::Hidden;
                }
            }
        }

        let props = self.base.props.borrow();

        let ease = match props.easing {
            Some(val) => val,
            None => get_easing(Easing::Linear),
        };
        self.draw_channels(ctx, ease(percent));
        // ctx.drawImageScaled(ctx.canvas, 0, 0, width, height);
        // ctx.drawImageScaled(ctx.canvas, 0, 0, width, height);
        self.base.draw_title(ctx);

        if percent < 1.0 {
            // animation_frame_id = window.requestAnimationFrame(draw_frame);
        } else if time.is_some() {
            self.base.animation_end();
        }
    }

    fn draw_channels(&self, ctx: &C, percent: f64) -> bool {
        ctx.set_line_width(2.);