# PictogramRow (/docs/charts/pictogram-row)

PictogramRow answers "how many of the N units are filled?" — ●●●○○ — counts a human can verify by counting. Filled vs
hollow is a shape difference too, never opacity alone, and unit size is constant: scaling glyphs with value is the
classic pictogram lie this component refuses to tell.

```tsx
<span className="text-lg">
  {"The coalition holds "}
  <PictogramRow value={5} total={8} title="Committee seats held" style={{ width: "4.5em", height: "0.9em" }} />
  {" of the seats."}
</span>
```

## Install

```tsx
import { PictogramRow } from "@microcharts/react/pictogram-row";

<PictogramRow value={5} total={8} title="Committee seats held" />
```

Setup (package + stylesheet): [Quickstart](/docs/quickstart#set-up-with-an-ai-agent) or paste [`/agent-setup.md`](/agent-setup.md) into your agent.


## When to use it

- **Good for** — seats, slots, and ratings in a sentence; capacity rows in tables.
- **Avoid for** — more than 20 units (counting fails; use Progress) or continuous ratios (Progress).


## Variants

```tsx
// the partial unit is real data — clipped, not rounded away
<PictogramRow value={2.5} total={4} />
```

```tsx
// seats can't be fractional — declare it
<PictogramRow value={2.5} total={4} fractional="round" />
```

```tsx
<PictogramRow value={3} total={5} shape="square" />
```

## Edge cases

```tsx
<PictogramRow value={3} total={0} title="No capacity" />
```

```tsx
<PictogramRow value={-2} total={4} title="Deficit" />
```

```tsx
<PictogramRow value={9} total={8} title="Over capacity" />
```

A `total` of 0 (or non-finite) draws nothing and the summary is "No data." — there is no meaningful row to count. A
negative value renders every unit hollow, and the summary still states the true number ("-2 of 4.") rather than clamping
to 0. A value past the total fills every unit — never more than `total` units drawn — but the summary keeps the honest
count ("9 of 8.") with a dev-time warning, so the overflow is never hidden.


## Why this default

Clip over round — the partial unit is real data, drawn as a true circular segment (not a `clipPath`, which would need
generated ids that break server rendering determinism). Overflow renders all units filled but the summary keeps the true
numbers ("9 of 8.") with a dev warning; the chart never silently caps the figure.

## Accessibility

The accessible name is the count — **"3 of 5."** — with the context noun coming from your `title` ("Committee seats
held. 3 of 5."). The interactive entry re-announces when the value changes, and roving the units announces each one on
its own: on the 5-of-8 demo at the top of this page, the fourth unit says "Unit 4 of 8 — filled." A unit reads as empty,
filled, or, for a genuinely partial one, the percentage it holds.

The interactive entry follows the shared [interaction contract](/docs/accessibility#one-interaction-contract):
arrow keys rove between units on both axes, `Home` and `End` jump to the ends, and a click, tap, `Enter` or
`Space` selects a unit — pinning its readout so it survives blur, until you select it again or press `Escape`.
On touch, a tap pins and a drag scrubs.

## Props

| Prop | Type | Description |
| --- | --- | --- |
| `value` (required) | `number` | Filled units (may be fractional). |
| `total` (required) | `number` | Unit count. |
| `shape` | `"dot" \| "square"` | Squares pack tighter in table cells. |
| `fractional` | `"clip" \| "round"` | Clip shows the true partial unit; round for seat-like units. |
| `renderPoint` | `(unit) => ReactNode` | Custom unit glyph (star ratings) — the one sanctioned customization. |
| `animate` | `boolean` | (interactive) Opt-in entrance motion when the chart mounts client-side — add `import "@microcharts/react/motion"` once. Inert on the server, on hydrated server HTML, and under `prefers-reduced-motion`. |

Plus the shared grammar — `data`, `domain`, `color`, `title`, `summary`, `format` — and the layout props (`width`, `height`, `className`, `style`) that every chart accepts. Interactive entries also share `animate` and `live`, and — wherever a chart has more than one navigable unit — `onActive`, `onSelect`, `selectedIndex` and `defaultSelectedIndex`; and — wherever the chart shows a hover value — `readout`. See [the shared grammar](/docs/quickstart#the-shared-grammar).