# Segmented Control
URL: /lynx/components/segmented-control
Source: https://github.com/daangn/seed-design/blob/dev/docs/content/lynx/components/segmented-control.mdx

여러 옵션 중 하나를 선택하여 관련 콘텐츠를 즉시 필터링하거나 전환할 때 사용하는 컴포넌트입니다.

Lynx Engine 최소 버전: 3.6

사용 가능 버전: @seed-design/lynx-react@0.6.0, @seed-design/lynx-css@0.10.0

## Preview

```tsx
import "./styles";

import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  return (
    <SegmentedControl defaultValue="Hot" accessibility-label="Sort by">
      <SegmentedControlItem value="Hot">Hot</SegmentedControlItem>
      <SegmentedControlItem value="New">New</SegmentedControlItem>
    </SegmentedControl>
  );
}
```

## Installation

- npm: npx @seed-design/cli add ui:segmented-control
- pnpm: pnpm dlx @seed-design/cli add ui:segmented-control
- yarn: yarn dlx @seed-design/cli add ui:segmented-control
- bun: bun x @seed-design/cli add ui:segmented-control

## Props

### `SegmentedControl`

<Callout type="info">
  `value`와 `defaultValue` 중 적어도 하나를 제공해야 선택된 항목과 Indicator를 표시할 수 있습니다.
</Callout>

### `SegmentedControlItem`

## Usage

```tsx
import {
  SegmentedControl,
  SegmentedControlItem,
} from "@/components/ui/segmented-control";

export function App() {
  return (
    <SegmentedControl defaultValue="hot" accessibility-label="정렬 기준">
      <SegmentedControlItem value="hot">인기순</SegmentedControlItem>
      <SegmentedControlItem value="new">최신순</SegmentedControlItem>
    </SegmentedControl>
  );
}
```

## Examples

### Disabled

`SegmentedControl`의 `disabled`는 전체 항목을 비활성화합니다. 각 `SegmentedControlItem`도 따로 비활성화할 수 있습니다.

```tsx
import "./styles";

import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  return (
    <view className="segmented-control-example">
      <SegmentedControl defaultValue="Hot" disabled accessibility-label="Sort by">
        <SegmentedControlItem value="Hot">Hot</SegmentedControlItem>
        <SegmentedControlItem value="New">New</SegmentedControlItem>
      </SegmentedControl>
      <SegmentedControl defaultValue="Marinara" accessibility-label="Pasta">
        <SegmentedControlItem value="Marinara">Marinara</SegmentedControlItem>
        <SegmentedControlItem value="Pesto" disabled>
          Pesto
        </SegmentedControlItem>
        <SegmentedControlItem value="Carbonara">Carbonara</SegmentedControlItem>
      </SegmentedControl>
    </view>
  );
}
```

### Notification

```tsx
import "./styles";

import { useState } from "@lynx-js/react";
import { ActionButton } from "@seed-design/lynx-react";
import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  const [sortBy, setSortBy] = useState("monthly");
  const [hasSeenAnnual, setHasSeenAnnual] = useState(false);

  function handleValueChange(value: string) {
    "background only";
    setSortBy(value);

    if (value === "annual") setHasSeenAnnual(true);
  }

  function handleResetNotification() {
    "background only";
    setHasSeenAnnual(false);
  }

  return (
    <view className="segmented-control-example">
      <SegmentedControl
        accessibility-label="Billing Method"
        value={sortBy}
        onValueChange={handleValueChange}
      >
        <SegmentedControlItem value="monthly">Monthly</SegmentedControlItem>
        <SegmentedControlItem value="annual" notification={!hasSeenAnnual}>
          Annual
        </SegmentedControlItem>
        <SegmentedControlItem value="enterprise">Enterprise Custom</SegmentedControlItem>
      </SegmentedControl>
      <ActionButton
        size="xsmall"
        variant="neutralSolid"
        disabled={!hasSeenAnnual}
        bindtap={handleResetNotification}
      >
        Reset Notification
      </ActionButton>
    </view>
  );
}
```

### Long Label

```tsx
import "./styles";

import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  return (
    <SegmentedControl defaultValue="price" accessibility-label="정렬 기준">
      <SegmentedControlItem value="price">가격 높은 순</SegmentedControlItem>
      <SegmentedControlItem value="discount">할인율 높은 순</SegmentedControlItem>
      <SegmentedControlItem value="popular">인기 많은 순</SegmentedControlItem>
    </SegmentedControl>
  );
}
```

### Fixed Width

`SegmentedControl`의 `style`이나 `className`으로 너비를 지정할 수 있습니다.

```tsx
import "./styles";

import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  return (
    <view className="segmented-control-example">
      <SegmentedControl
        className="segmented-control-example__fixed-wide"
        defaultValue="new"
        accessibility-label="Sort by"
      >
        <SegmentedControlItem value="new">New</SegmentedControlItem>
        <SegmentedControlItem value="hot">Hot</SegmentedControlItem>
      </SegmentedControl>
      <SegmentedControl
        className="segmented-control-example__fixed-narrow"
        defaultValue="oneway"
        accessibility-label="Trip Type"
      >
        <SegmentedControlItem value="oneway">One Way Trip</SegmentedControlItem>
        <SegmentedControlItem notification value="round">
          Round Trip
        </SegmentedControlItem>
        <SegmentedControlItem notification value="multi">
          Multi-City Journey
        </SegmentedControlItem>
      </SegmentedControl>
    </view>
  );
}
```

### Listening to Value Changes

`onValueChange`로 선택 값 변경을 감지할 수 있습니다. Controlled 모드에서는 `value`와 함께 사용합니다.

```tsx
import "./styles";

import { useState } from "@lynx-js/react";

import { SegmentedControl, SegmentedControlItem } from "@/components/ui/segmented-control";

export default function Example() {
  const [count, setCount] = useState(0);
  const [lastValue, setLastValue] = useState<string | null>(null);

  function handleValueChange(nextValue: string) {
    "background only";
    setCount((previous) => previous + 1);
    setLastValue(nextValue);
  }

  return (
    <view className="segmented-control-example">
      <SegmentedControl
        defaultValue="hot"
        onValueChange={handleValueChange}
        accessibility-label="Sort by"
      >
        <SegmentedControlItem value="hot">Hot</SegmentedControlItem>
        <SegmentedControlItem value="new">New</SegmentedControlItem>
      </SegmentedControl>
      <text className="segmented-control-example__status">
        onValueChange called: {count} times, last value: {lastValue ?? "-"}
      </text>
    </view>
  );
}
```

## 웹 버전과의 차이

- 선택 이벤트는 input change 대신 `bindtap`과 `onValueChange`로 받습니다.
- 접근성은 ARIA 대신 Lynx의 `accessibility-*` 속성을 사용합니다.

## Lynx 미지원 기능

- HTML form 제출을 위한 `ItemHiddenInput`, `name`, `form`, `inputProps`
- 키보드 focus와 focus-visible 상호작용
- `SegmentedControlItem`의 `invalid` 상태. 오류 문구는 컴포넌트 가까이에 표시하고 `accessibility-label`에도 포함하세요.