Struct Sparkline 

pub struct Sparkline<'a> { /* private fields */ }

A single-row sparkline of samples, scaled to the sample max, using the eight vertical block glyphs ▁▂▃▄▅▆▇█.

The most recent samples are right-aligned so the graph scrolls left as new data arrives. By default, bar height and color track each sample’s fraction of the max via Meter (a green-to-red load ramp); call Sparkline::style to draw every bar in one fixed color instead, height only, the right choice once the color channel would otherwise imply something the data doesn’t mean (e.g. a frame-time graph, where “tallest bar in view” isn’t the same thing as “bad”: super::PerfOverlay does this). Only the first row of area is drawn.

Unlike super::BoxBorder, super::Gauge, super::StatBar, super::Table, and super::Button, Sparkline has no theme()/ theme_on() pair: Meter already gives its bars a semantic green-to-red color, and a fixed Sparkline::style override has no single Theme role to map onto either.

Examples

use retroglyph_core::grid::{Grid, Rect};
use retroglyph_ui::{Surface, Sparkline, Widget};

let samples = [1.0, 3.0, 2.0, 4.0, 1.5];
let mut grid = Grid::new(10, 1);
let area = Rect::new(0, 0, 10, 1);
Sparkline::new(&samples).render(&mut Surface::new(&mut grid, area, 0));

Implementations

impl<'a> Sparkline<'a>

pub const fn new(samples: &'a [f32]) -> Self

A sparkline of samples, colored by Meter (green-to-red load ramp) unless overridden with style.

pub const fn style(self, style: Style) -> Self

Draws every bar in style’s foreground color instead of the default Meter ramp. Height still tracks each sample’s fraction of the max; only the color stops varying.

Trait Implementations

impl<'a> Clone for Sparkline<'a>

fn clone(&self) -> Sparkline<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for Sparkline<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Widget for Sparkline<'_>

fn render(&self, surface: &mut Surface<'_>)

Draw this widget into surface, filling surface.area().

impl<'a> Copy for Sparkline<'a>