hydroxy

Dot plot chart

Compare values across categories with dots instead of bars. Two or more series per row draw a dumbbell, so the gap between them reads at a glance.

Median salary by role

Thousands per year, last year against this year.

Median salary by role, 2024 and 2025
20242025
Product designer£58k£61k
Frontend engineer£64k£70k
Data analyst£49k£53k
Support lead£41k£42k
Engineering manager£88k£91k

One-bedroom rent

A single series is a plain dot plot.

Median one-bedroom rent by city
Median rent
Lisbon1350
Berlin1480
Toronto2150
Melbourne1920

Usage

use hydroxy_leptos::chart_frame::ChartFrame;
use hydroxy_leptos::dot_plot_chart::*;
use leptos::prelude::*;

pub fn demo() -> AnyView {
    let roles: Vec<String> =
        ["Product designer", "Frontend engineer", "Data analyst", "Support lead", "Engineering manager"]
            .map(String::from)
            .to_vec();
    // Two series draw a dumbbell: the bar is the change between years.
    let salaries =
        vec![Series::new("2024", [58.0, 64.0, 49.0, 41.0, 88.0]), Series::new("2025", [61.0, 70.0, 53.0, 42.5, 91.0])];
    let cities: Vec<String> = ["Lisbon", "Berlin", "Toronto", "Melbourne"].map(String::from).to_vec();
    let rent = vec![Series::new("Median rent", [1_350.0, 1_480.0, 2_150.0, 1_920.0])];

    view! {
        <div style="display: grid; gap: var(--space-10);">
            <ChartFrame title="Median salary by role" description="Thousands per year, last year against this year.">
                <DotPlotChart rows=roles series=salaries label="Median salary by role, 2024 and 2025" format=|v: f64| format!("£{v:.0}k") />
            </ChartFrame>
            <ChartFrame title="One-bedroom rent" description="A single series is a plain dot plot.">
                <DotPlotChart
                    rows=cities
                    series=rent
                    label="Median one-bedroom rent by city"
                    annotations=vec![Annotation::y_line(1_800.0, "Budget")]
                />
            </ChartFrame>
        </div>
    }
    .into_any()
}

Anatomy

Componentdata-partRenders
DotPlotChartrootfigure with a screen-reader table of every value
dotOne per series and row, in categorical colour
stickThe dumbbell bar from a row's lowest to its highest dot
x-labelRow names, down the left
tooltipThe row and every series' value, the active one in bold
legendSeries names and colours, shown for two or more series

Keyboard

KeyDoes
ArrowUp / ArrowDownPrevious or next row
ArrowLeft / ArrowRightPrevious or next series in the row
Home / EndFirst or last series in the row
EscapeHide the tooltip

Props

PropTypeNotes
rowsVec<String>Required. One label per row
seriesVec<Series>Required. Series::new(name, values); past six, the smallest fold into Other
labelStringRequired. What the chart shows; the accessible name
scaleScaleKindLinear (default), Log or Symlog; the axis fits the data, not zero
heightu16Plot height in px. Default 36 per row
formatFn(f64) -> StringFormats ticks, tooltip and table
annotationsVec<Annotation>y_line and y_band mark values (drawn vertically); x is a row index

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PropTypeNotes
on_hoverCallback<Option<Datum>>The mark under the pointer or keyboard focus changes, or is left. Fires only on a change
on_selectCallback<Datum>Click, tap or Enter on a mark
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