Method view_top_right_overlay

src/plot_widget.rs:1040–1072

(&self, has_legend: bool)

    fn view_tooltip_overlay<'a>(
        &'a self,
        payload: &'a Option<TooltipUiPayload>,
        camera_bounds: &Option<(Camera, Rectangle)>,
    ) -> Option<Element<'a, PlotUiMessage>> {
        // Offset a bit from point position
        const OFFSET: f32 = 8.0;
        let payload = payload.as_ref()?;
        let [screen_x, screen_y] = payload.screen_xy?;

        let mut anchor = [screen_x + OFFSET, screen_y + OFFSET];
        let mut horizontal_position = Horizontal::Right;
        let mut vertical_position = Vertical::Bottom;

        // flip the tooltip if the point is outside this percentage of the bounds
        const FLIP_PCT: f32 = 0.8;
        if let Some((_, bounds)) = &camera_bounds {
            if screen_y > bounds.height * FLIP_PCT {
                // Place the tooltip above the point.
                anchor[1] = screen_y - OFFSET;
                vertical_position = Vertical::Top;
            }
            if screen_x > bounds.width * FLIP_PCT {
                // Place the tooltip to the left of the point.
                anchor[0] = screen_x - OFFSET;
                horizontal_position = Horizontal::Left;
            }
        }

        let tooltip_bubble = container(
            widget::text(&payload.text)
                .size(14.0)
                .wrapping(widget::text::Wrapping::None),
        )
        .padding(6.0)
        .style(|theme| self.update_style(theme).tooltip);