# Wheel Picker

A scrolling, 3D-curved wheel of options, like the iOS picker, for choosing values such as dates and times.

Wheel Picker is an open-source component from suiss/ui for React, React Native, SwiftUI and Jetpack Compose. The @esuiss/ui CLI copies its source into your project, so you own the code.

Source: https://ui.suiss.app/docs/components/wheel-picker

**React**

**Example**

```tsx
import {
  WheelPicker,
  WheelPickerColumn,
  WheelPickerItem,
} from "@/components/ui/wheel-picker"

const fruits = [
  "Apple",
  "Banana",
  "Cherry",
  "Grape",
  "Lemon",
  "Mango",
  "Orange",
  "Peach",
  "Pear",
  "Plum",
]

export default function WheelPickerDemo() {
  return (
    <div className="w-80 rounded-2xl bg-card p-4 shadow-md ring-1 ring-foreground/5 dark:ring-foreground/10">
      <WheelPicker>
        <WheelPickerColumn aria-label="Fruit" defaultValue="Lemon">
          {fruits.map((fruit) => (
            <WheelPickerItem key={fruit} value={fruit}>
              {fruit}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
    </div>
  )
}
```

`WheelPicker` is the frame: it draws the highlighted selection band across the middle and lays out one or more `WheelPickerColumn` wheels side by side. Each column is a scrolling list of `WheelPickerItem` options that snap to the center, and rows curve away and fade as they move from the middle.

A column selects the item that comes to rest in the center after scrolling, or the item that's clicked. Use a wheel picker for touch-friendly choices from ordered lists, especially several related columns such as day, hour and minute. For a compact dropdown, use `Select`.

## Installation

### CLI

```bash title="Terminal"
npx shadcn@latest add @esuiss/wheel-picker
```

Works in any project with a `components.json`. See [Installation](https://ui.suiss.app/docs/installation#add-components) for the one-line registry setup. Or use the suiss/ui CLI:

```bash title="Terminal"
npx @esuiss/ui@latest add wheel-picker
```

### Manual

1. Add the [`cn` helper](https://ui.suiss.app/docs/installation#the-cn-helper).

2. Copy the source into `components/ui/wheel-picker.tsx`:

```tsx title="components/ui/wheel-picker.tsx"
"use client"

import * as React from "react"
import { cn } from "@/lib/utils"

type WheelPickerColumnProps = {
  value?: string
  defaultValue?: string
  onValueChange?: (value: string) => void
}

type WheelPickerColumnContextProps = {
  value: string | undefined
  select: (value: string) => void
  getItemId: (value: string) => string
}

const WheelPickerColumnContext =
  React.createContext<WheelPickerColumnContextProps | null>(null)

function useWheelPickerColumn() {
  const context = React.useContext(WheelPickerColumnContext)

  if (!context) {
    throw new Error(
      "useWheelPickerColumn must be used within a <WheelPickerColumn />"
    )
  }

  return context
}

declare const ViewTimeline: {
  new (options: {
    subject: Element
    axis: "block"
    inset: CSSNumericValue[]
  }): AnimationTimeline
}

const ROW_ANGLE = Math.PI / 10.5
const MAX_ANGLE = Math.PI / 2
const PERSPECTIVE = 1200
const FADE_ANGLE = 0.35
const VISIBLE_ROWS = MAX_ANGLE / ROW_ANGLE
const CURVE_STEPS = 42
const ANIMATED_BUFFER = 3
const SUPPORTS_SCROLL_END =
  typeof window !== "undefined" && "onscrollend" in window
const SUPPORTS_VIEW_TIMELINE =
  typeof window !== "undefined" && "ViewTimeline" in window

function curve(distance: number, height: number) {
  const radius = height / ROW_ANGLE
  const angle = Math.min(Math.max(distance * ROW_ANGLE, -MAX_ANGLE), MAX_ANGLE)
  const offset = Math.abs(distance)
  const tone = offset < 1 ? 1 - offset * 0.45 : 0.55 - (offset - 1) * 0.06
  const fade = Math.min(1, (MAX_ANGLE - Math.abs(angle)) / FADE_ANGLE)
  const depth = PERSPECTIVE / (PERSPECTIVE + radius - radius * Math.cos(angle))
  const y = radius * Math.sin(angle) - distance * height
  return {
    transform: `translateY(${y.toFixed(2)}px) scale(${depth.toFixed(3)}, ${(depth * Math.cos(angle)).toFixed(3)})`,
    opacity: Math.max(0, tone * fade).toFixed(3),
  }
}

function curveKeyframes(height: number) {
  return Array.from({ length: CURVE_STEPS + 1 }, (_, step) =>
    curve(VISIBLE_ROWS * (1 - (2 * step) / CURVE_STEPS), height)
  )
}

function isEnabled(item: HTMLElement | undefined) {
  return item !== undefined && !item.hasAttribute("data-disabled")
}

function enabledIndex(items: HTMLElement[], from: number, step: 1 | -1) {
  for (let index = from; index >= 0 && index < items.length; index += step) {
    if (isEnabled(items[index])) return index
  }
  return -1
}

function nearestEnabledIndex(items: HTMLElement[], from: number) {
  for (let distance = 0; distance < items.length; distance++) {
    if (isEnabled(items[from - distance])) return from - distance
    if (isEnabled(items[from + distance])) return from + distance
  }
  return -1
}

function scrollBehavior(): ScrollBehavior {
  return window.matchMedia("(prefers-reduced-motion: reduce)").matches
    ? "auto"
    : "smooth"
}

function WheelPicker({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="wheel-picker"
      className={cn(
        "relative flex items-stretch justify-center [--wheel-picker-item-height:--spacing(8)] before:pointer-events-none before:absolute before:inset-x-0 before:top-1/2 before:h-(--wheel-picker-item-height) before:-translate-y-1/2 before:rounded-lg before:bg-secondary",
        className
      )}
      {...props}
    />
  )
}

function WheelPickerColumn({
  value: valueProp,
  defaultValue,
  onValueChange,
  className,
  children,
  ref,
  ...props
}: React.ComponentProps<"div"> & WheelPickerColumnProps) {
  const [uncontrolledValue, setUncontrolledValue] = React.useState(defaultValue)
  const value = valueProp ?? uncontrolledValue
  const valueRef = React.useRef(value)
  valueRef.current = value

  const columnRef = React.useRef<HTMLDivElement>(null)
  const frameRef = React.useRef(0)
  const settleRef = React.useRef<ReturnType<typeof setTimeout>>(undefined)
  const id = React.useId()

  const getItems = React.useCallback(
    () =>
      Array.from(
        columnRef.current?.querySelectorAll<HTMLElement>(
          "[data-slot=wheel-picker-item]"
        ) ?? []
      ),
    []
  )

  const getIndex = React.useCallback(
    (target: string | undefined) =>
      getItems().findIndex((item) => item.dataset.value === target),
    [getItems]
  )

  const getCenteredIndex = React.useCallback(() => {
    const column = columnRef.current
    const items = getItems()
    const first = items[0]
    if (!column || !first) return -1
    const index = Math.round(column.scrollTop / first.offsetHeight)
    return Math.min(Math.max(index, 0), items.length - 1)
  }, [getItems])

  const getItemId = React.useCallback(
    (itemValue: string) => `${id}-${itemValue.replace(/\s+/g, "-")}`,
    [id]
  )

  const select = React.useCallback(
    (next: string) => {
      if (next === valueRef.current) return
      valueRef.current = next
      if (valueProp === undefined) setUncontrolledValue(next)
      onValueChange?.(next)
    },
    [valueProp, onValueChange]
  )

  const targetRef = React.useRef<number | null>(null)

  const scrollTo = React.useCallback(
    (index: number, behavior: ScrollBehavior) => {
      const column = columnRef.current
      const item = getItems()[index]
      if (!column || !item) return
      const top = index * item.offsetHeight
      targetRef.current =
        behavior === "smooth" && Math.abs(column.scrollTop - top) >= 1
          ? index
          : null
      column.scrollTo({ top, behavior })
    },
    [getItems]
  )

  const releaseTarget = React.useCallback(() => {
    targetRef.current = null
  }, [])

  const paintedRef = React.useRef<HTMLElement[]>([])
  const updateRef = React.useRef<() => void>(() => undefined)

  const paint = React.useCallback(() => {
    const column = columnRef.current
    const items = getItems()
    const firstItem = items[0]
    if (!column || !firstItem) return
    const height = firstItem.offsetHeight
    const position = column.scrollTop / height
    const first = Math.max(Math.ceil(position - VISIBLE_ROWS), 0)
    const last = Math.min(Math.floor(position + VISIBLE_ROWS), items.length - 1)
    const painted: HTMLElement[] = []
    for (let index = first; index <= last; index++) {
      const item = items[index]
      if (!item) continue
      const content = item.firstElementChild as HTMLElement | null
      if (!content) continue
      const { transform, opacity } = curve(index - position, height)
      content.style.transform = transform
      content.style.opacity = opacity
      painted.push(content)
    }
    for (const content of paintedRef.current) {
      if (painted.includes(content)) continue
      content.style.transform = ""
      content.style.opacity = ""
    }
    paintedRef.current = painted
  }, [getItems])

  const settle = React.useCallback(() => {
    const items = getItems()
    const centered = getCenteredIndex()
    if (targetRef.current !== null) {
      if (centered !== targetRef.current) return
      targetRef.current = null
    }
    const index = nearestEnabledIndex(items, centered)
    const next = items[index]?.dataset.value
    if (next === undefined) return
    if (index !== centered) scrollTo(index, scrollBehavior())
    select(next)
  }, [getItems, getCenteredIndex, scrollTo, select])

  const handleScroll = React.useCallback(() => {
    cancelAnimationFrame(frameRef.current)
    frameRef.current = requestAnimationFrame(() => updateRef.current())
    if (SUPPORTS_SCROLL_END) return
    clearTimeout(settleRef.current)
    settleRef.current = setTimeout(settle, 150)
  }, [settle])

  const handleClick = React.useCallback(
    (event: React.MouseEvent<HTMLDivElement>) => {
      const item = (event.target as HTMLElement).closest<HTMLElement>(
        "[data-slot=wheel-picker-item]"
      )
      if (item?.dataset.value === undefined || !isEnabled(item)) return
      select(item.dataset.value)
    },
    [select]
  )

  const handleKeyDown = React.useCallback(
    (event: React.KeyboardEvent<HTMLDivElement>) => {
      const items = getItems()
      const index = getIndex(valueRef.current)
      const current = Math.max(index, 0)
      const last = items.length - 1
      let target: number

      if (event.key === "ArrowDown") {
        target = enabledIndex(items, index < 0 ? 0 : current + 1, 1)
      } else if (event.key === "ArrowUp") {
        target = enabledIndex(items, current - 1, -1)
      } else if (event.key === "PageDown") {
        target = nearestEnabledIndex(items, Math.min(current + 5, last))
      } else if (event.key === "PageUp") {
        target = nearestEnabledIndex(items, Math.max(current - 5, 0))
      } else if (event.key === "Home") {
        target = enabledIndex(items, 0, 1)
      } else if (event.key === "End") {
        target = enabledIndex(items, last, -1)
      } else {
        return
      }

      event.preventDefault()
      const next = items[target]?.dataset.value
      if (next !== undefined) select(next)
    },
    [getItems, getIndex, select]
  )

  const itemCount = React.Children.count(children)

  React.useLayoutEffect(() => {
    scrollTo(Math.max(getIndex(valueRef.current), 0), "auto")
  }, [scrollTo, getIndex])

  React.useLayoutEffect(() => {
    const column = columnRef.current
    if (!column || itemCount === 0) return
    if (!SUPPORTS_VIEW_TIMELINE) {
      paintedRef.current = []
      updateRef.current = paint
      paint()
      return
    }
    const animations = new Map<HTMLElement, Animation>()
    let keyframes: Keyframe[] = []
    let inset: CSSNumericValue[] = []
    let height = 0
    let range = ""
    const update = () => {
      if (!height) return
      const position = Math.round(column.scrollTop / height)
      const first = Math.floor(position - VISIBLE_ROWS - ANIMATED_BUFFER)
      const last = Math.ceil(position + VISIBLE_ROWS + ANIMATED_BUFFER)
      if (range === `${first}:${last}`) return
      range = `${first}:${last}`
      const items = getItems()
      for (const [content, animation] of animations) {
        const index = items.indexOf(content.parentElement as HTMLElement)
        if (index >= first && index <= last) continue
        animation.cancel()
        animations.delete(content)
      }
      for (
        let index = Math.max(first, 0);
        index <= Math.min(last, items.length - 1);
        index++
      ) {
        const item = items[index]
        if (!item) continue
        const content = item.firstElementChild as HTMLElement | null
        if (!content || animations.has(content)) continue
        animations.set(
          content,
          content.animate(keyframes, {
            timeline: new ViewTimeline({ subject: item, axis: "block", inset }),
            fill: "both",
          })
        )
      }
    }
    const rebuild = () => {
      height = getItems()[0]?.offsetHeight ?? 0
      range = ""
      if (!height) return
      keyframes = curveKeyframes(height)
      const reach = (VISIBLE_ROWS - 0.5) * height - column.clientHeight / 2
      inset = [CSS.px(-reach), CSS.px(-reach)]
      for (const animation of animations.values()) animation.cancel()
      animations.clear()
      update()
    }
    updateRef.current = update
    const observer = new ResizeObserver(rebuild)
    observer.observe(column)
    rebuild()
    return () => {
      observer.disconnect()
      for (const animation of animations.values()) animation.cancel()
    }
  }, [itemCount, getItems, paint])

  React.useEffect(() => {
    const index = getIndex(value)
    if (index === -1 || index === getCenteredIndex()) return
    scrollTo(index, scrollBehavior())
  }, [value, getIndex, getCenteredIndex, scrollTo])

  React.useEffect(
    () => () => {
      cancelAnimationFrame(frameRef.current)
      clearTimeout(settleRef.current)
    },
    []
  )

  return (
    <WheelPickerColumnContext.Provider value={{ value, select, getItemId }}>
      <div
        ref={(node) => {
          columnRef.current = node
          if (typeof ref === "function") return ref(node)
          if (ref) ref.current = node
        }}
        data-slot="wheel-picker-column"
        role="listbox"
        tabIndex={0}
        aria-activedescendant={
          value === undefined ? undefined : getItemId(value)
        }
        onScroll={handleScroll}
        onScrollEnd={settle}
        onWheel={releaseTarget}
        onTouchStart={releaseTarget}
        onPointerDown={releaseTarget}
        onClickCapture={handleClick}
        onKeyDownCapture={handleKeyDown}
        className={cn(
          "no-scrollbar relative h-[calc(var(--wheel-picker-item-height)*6.75)] min-w-max snap-y snap-mandatory overflow-y-auto overscroll-contain rounded-lg py-[calc(var(--wheel-picker-item-height)*2.875)] outline-none focus-visible:ring-3 focus-visible:ring-ring/50",
          className
        )}
        {...props}
      >
        {children}
      </div>
    </WheelPickerColumnContext.Provider>
  )
}

function WheelPickerItem({
  value,
  disabled = false,
  className,
  children,
  ...props
}: React.ComponentProps<"div"> & { value: string; disabled?: boolean }) {
  const { value: selectedValue, getItemId } = useWheelPickerColumn()
  const selected = selectedValue === value

  return (
    <div
      id={getItemId(value)}
      role="option"
      tabIndex={-1}
      aria-selected={selected}
      aria-disabled={disabled || undefined}
      data-slot="wheel-picker-item"
      data-value={value}
      data-selected={selected ? "" : undefined}
      data-disabled={disabled ? "" : undefined}
      className={cn(
        "flex h-(--wheel-picker-item-height) cursor-default snap-center items-center justify-center px-3 text-xl whitespace-nowrap text-foreground tabular-nums select-none data-disabled:opacity-50",
        className
      )}
      {...props}
    >
      <span className="opacity-0">{children}</span>
    </div>
  )
}

export { WheelPicker, WheelPickerColumn, WheelPickerItem }
```

3. Update the import paths to match your project.

## Usage

```tsx
import { WheelPicker, WheelPickerColumn, WheelPickerItem } from "@/components/ui/wheel-picker"
```

```tsx
<div className="w-80 rounded-2xl bg-card p-4 shadow-md ring-1 ring-foreground/5 dark:ring-foreground/10">
  <WheelPicker>
    <WheelPickerColumn aria-label="Fruit" defaultValue="Lemon">
      {fruits.map((fruit) => (
        <WheelPickerItem key={fruit} value={fruit}>
          {fruit}
        </WheelPickerItem>
      ))}
    </WheelPickerColumn>
  </WheelPicker>
</div>
```

Each column manages its own value. Use `defaultValue` on `WheelPickerColumn` for an uncontrolled column, or `value` with `onValueChange` to control it. Give every `WheelPickerItem` a unique string `value`; its children are the visible label.

Set `disabled` on items that can't be chosen. Scrolling skips past them to the nearest enabled item, and the keyboard steps over them.

## Examples

### Disabled items

Disables booked time slots so scrolling, keys and clicks skip them.

**Example**

```tsx
import {
  WheelPicker,
  WheelPickerColumn,
  WheelPickerItem,
} from "@/components/ui/wheel-picker"

const slots = Array.from({ length: 11 }, (_, index) => {
  const minutes = 18 * 60 + index * 30
  return `${Math.floor(minutes / 60)}:${String(minutes % 60).padStart(2, "0")}`
})

const booked = new Set(["19:30", "20:00", "20:30"])

export default function WheelPickerDisabledItems() {
  return (
    <div className="w-80 rounded-2xl bg-card p-4 shadow-md ring-1 ring-foreground/5 dark:ring-foreground/10">
      <WheelPicker>
        <WheelPickerColumn aria-label="Reservation time" defaultValue="19:00">
          {slots.map((slot) => (
            <WheelPickerItem
              key={slot}
              value={slot}
              disabled={booked.has(slot)}
            >
              {slot}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
    </div>
  )
}
```

### Date time

Combines controlled day, hour and minute columns into a date and time picker.

**Example**

```tsx
import * as React from "react"
import {
  WheelPicker,
  WheelPickerColumn,
  WheelPickerItem,
} from "@/components/ui/wheel-picker"

function toDayValue(date: Date) {
  return [
    date.getFullYear(),
    String(date.getMonth() + 1).padStart(2, "0"),
    String(date.getDate()).padStart(2, "0"),
  ].join("-")
}

const today = new Date(2026, 9, 4)

const days = Array.from({ length: 15 }, (_, index) => {
  const date = new Date(
    today.getFullYear(),
    today.getMonth(),
    today.getDate() + index - 7
  )
  const label =
    index === 7
      ? "Today"
      : date.toLocaleDateString("en-US", {
          weekday: "short",
          month: "short",
          day: "numeric",
        })
  return { value: toDayValue(date), label }
})

const hours = Array.from({ length: 24 }, (_, hour) =>
  String(hour).padStart(2, "0")
)

const minutes = Array.from({ length: 12 }, (_, step) =>
  String(step * 5).padStart(2, "0")
)

function DateTimeExample(props: React.ComponentProps<typeof WheelPicker>) {
  const [day, setDay] = React.useState(toDayValue(today))
  const [hour, setHour] = React.useState("19")
  const [minute, setMinute] = React.useState("30")

  return (
    <div className="flex flex-col gap-3">
      <WheelPicker {...props}>
        <WheelPickerColumn
          aria-label="Day"
          value={day}
          onValueChange={setDay}
          className="flex-1 *:justify-end"
        >
          {days.map(({ value, label }) => (
            <WheelPickerItem key={value} value={value}>
              {label}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
        <WheelPickerColumn
          aria-label="Hour"
          value={hour}
          onValueChange={setHour}
        >
          {hours.map((value) => (
            <WheelPickerItem key={value} value={value}>
              {value}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
        <WheelPickerColumn
          aria-label="Minute"
          value={minute}
          onValueChange={setMinute}
          className="flex-1 *:justify-start"
        >
          {minutes.map((value) => (
            <WheelPickerItem key={value} value={value}>
              {value}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
      <p className="text-center text-sm text-muted-foreground tabular-nums">
        {day} {hour}:{minute}
      </p>
    </div>
  )
}

export default function WheelPickerDateTime() {
  return (
    <div className="w-80 rounded-2xl bg-card p-4 shadow-md ring-1 ring-foreground/5 dark:ring-foreground/10">
      <DateTimeExample />
    </div>
  )
}
```

## API Reference

- `WheelPicker`
- `WheelPickerColumn`
  - `WheelPickerItem`

### WheelPicker

The frame that holds the columns and draws the selection band.

Also accepts the props of `React.ComponentProps<"div">`.

### WheelPickerColumn

A scrolling, snapping wheel that holds one selected value.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `value` | `string` | - | The selected value, for controlled use. |
| `defaultValue` | `string` | - | The initial value when uncontrolled. |
| `onValueChange` | `(value: string) => void` | - | Called when the column settles on a new value. |

Also accepts the props of `React.ComponentProps<"div">`, `WheelPickerColumnProps`.

### WheelPickerItem

A single option in a column.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `value` | `string` | Required | The string value this item selects; it must be unique in its column. |
| `disabled` | `boolean` | `false` | Prevents the item from being selected. |

Also accepts the props of `React.ComponentProps<"div">`.

## Accessibility

- Each column has the `listbox` role and is focusable; name it with `aria-label`. Items are `option` elements with `aria-selected`, and the column points to the selected item with `aria-activedescendant`.
- With a column focused, the up and down arrow keys move to the previous or next enabled item, `Page Up` and `Page Down` move by five, and `Home` and `End` jump to the first and last enabled items.
- Disabled items set `aria-disabled` and ignore clicks.
- When reduced motion is preferred, the column scrolls to new values without smooth scrolling.

## Notes

- Row height comes from `--wheel-picker-item-height` (`--spacing(8)` by default), set on `WheelPicker`; the column shows about seven rows.
- The curve is driven by scroll-driven animations where `ViewTimeline` is supported, and by a scroll handler elsewhere.
- Parts carry `data-slot` attributes: `wheel-picker`, `wheel-picker-column` and `wheel-picker-item`. Items set `data-value`, `data-selected` and `data-disabled`.
- The selection band uses `bg-secondary`.

**React Native, SwiftUI, Jetpack Compose**

![Preview](https://ui.suiss.app/previews/components-wheel-picker--default.light.webp)

```tsx
import { View } from "react-native"
import { WheelPicker, WheelPickerColumn, WheelPickerItem } from "@/components/ui/wheel-picker"

const fruits = [
  "Apple",
  "Banana",
  "Cherry",
  "Grape",
  "Lemon",
  "Mango",
  "Orange",
  "Peach",
  "Pear",
  "Plum",
]

export function WheelPickerExample() {
  return (
    <View className="w-80 rounded-2xl border border-foreground/5 bg-card p-4 shadow-md dark:border-foreground/10">
      <WheelPicker>
        <WheelPickerColumn accessibilityLabel="Fruit" defaultValue="Lemon">
          {fruits.map((fruit) => (
            <WheelPickerItem key={fruit} value={fruit}>
              {fruit}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct WheelPickerExample: View {
  var body: some View {
    WheelPickerFrame {
      FruitDemo()
    }
  }
}

struct WheelPickerFrame<Content: View>: View {
  @ViewBuilder let content: () -> Content

  @Environment(\.colorScheme) private var colorScheme

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
    content()
      .padding(16)
      .frame(width: 320)
      .background(EsuissColor.card, in: shape)
      .overlay {
        shape.strokeBorder(EsuissColor.foreground.opacity(colorScheme == .dark ? 0.1 : 0.05))
      }
      .shadow(Shadow.md)
  }
}

let wheelFruits = ["Apple", "Banana", "Cherry", "Grape", "Lemon", "Mango", "Orange", "Peach", "Pear", "Plum"]

struct FruitDemo: View {
  @State private var fruit = "Lemon"

  var body: some View {
    WheelPicker {
      WheelPickerColumn(selection: $fruit) {
        ForEach(wheelFruits, id: \.self) { item in
          WheelPickerItem(verbatim: item, value: item)
        }
      }
      .accessibilityLabel(Text("Fruit"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.WheelPicker
import com.esuiss.ui.components.WheelPickerColumn
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.shadow

@Composable
fun WheelPickerExample() {
    WheelPickerFrame { WheelPickerFruits() }
}

val wheelPickerFruits = listOf(
    "Apple",
    "Banana",
    "Cherry",
    "Grape",
    "Lemon",
    "Mango",
    "Orange",
    "Peach",
    "Pear",
    "Plum",
)

@Composable
fun WheelPickerFrame(content: @Composable () -> Unit) {
    val colors = EsuissTheme.colors
    val shape = RoundedCornerShape(Radius.xl2)
    Box(
        Modifier
            .width(320.dp)
            .shadow(Shadows.md, shape)
            .background(colors.card, shape)
            .border(1.dp, colors.foreground.copy(alpha = if (colors.isDark) 0.1f else 0.05f), shape)
            .padding(16.dp),
    ) {
        content()
    }
}

@Composable
fun WheelPickerFruits() {
    var value by rememberSaveable { mutableStateOf("Lemon") }
    WheelPicker(Modifier.fillMaxWidth()) {
        WheelPickerColumn(value, { value = it }, label = "Fruit") {
            wheelPickerFruits.forEach { WheelPickerItem(it, it) }
        }
    }
}
```

`WheelPicker` lays out one or more `WheelPickerColumn` components side by side behind a shared highlight band. Each column is a snapping `ScrollView`; items above and below the center are scaled, moved and faded with React Native `Animated` interpolations to look like a rotating wheel.

Use it for times, dates and other values picked from a short, ordered list, often in a sheet or popover.

## Installation

**React Native**

```bash title="Terminal"
npx shadcn@latest add @esuiss-rn/wheel-picker
```

See [Installation](https://ui.suiss.app/docs/installation) for the `components.json` setup. Or use the suiss/ui CLI:

```bash title="Terminal"
npx @esuiss/ui@latest add wheel-picker
```

**SwiftUI**

```bash title="Terminal"
npx @esuiss/ui@latest add wheel-picker --platform swift
```

**Jetpack Compose**

```bash title="Terminal"
npx @esuiss/ui@latest add wheel-picker --platform kotlin
```

The CLI also adds what it builds on: [Text](https://ui.suiss.app/docs/components/text).

### Manual

**React Native**

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install cn
```

2. Add the pieces it builds on: [Text](https://ui.suiss.app/docs/components/text), and the primitives `components/primitives/use-render.tsx`, `components/primitives/wheel-picker.tsx`.

3. Copy the source into `components/ui/wheel-picker.tsx`:

```tsx title="uniwind/components/ui/wheel-picker.tsx"
import { cn } from "cn"
import type * as React from "react"
import { resolveClassName } from "@/components/primitives/use-render"
import * as WheelPickerPrimitive from "@/components/primitives/wheel-picker"
import { Text, TextClassContext } from "@/components/ui/text"

function WheelPicker({
  className,
  children,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Root>) {
  return (
    <WheelPickerPrimitive.Root
      className={(state) =>
        cn(
          "relative flex-row items-stretch justify-center",
          resolveClassName(className, state)
        )
      }
      {...props}
    >
      <WheelPickerPrimitive.Indicator className="rounded-lg bg-secondary" />
      {children}
    </WheelPickerPrimitive.Root>
  )
}

function WheelPickerColumn({
  className,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Column>) {
  return (
    <WheelPickerPrimitive.Column
      className={(state) =>
        cn("relative rounded-lg", resolveClassName(className, state))
      }
      {...props}
    />
  )
}

function WheelPickerItem({
  className,
  children,
  disabled = false,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Item>) {
  return (
    <TextClassContext.Provider
      value={cn(
        "text-xl text-foreground tabular-nums",
        disabled && "text-muted-foreground"
      )}
    >
      <WheelPickerPrimitive.Item
        disabled={disabled}
        className={(state) =>
          cn(
            "flex-row items-center justify-center px-3",
            resolveClassName(className, state)
          )
        }
        {...props}
      >
        {typeof children === "string" || typeof children === "number" ? (
          <Text numberOfLines={1}>{children}</Text>
        ) : (
          children
        )}
      </WheelPickerPrimitive.Item>
    </TextClassContext.Provider>
  )
}

export { WheelPicker, WheelPickerColumn, WheelPickerItem }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install cn
```

2. Add the pieces it builds on: [Text](https://ui.suiss.app/docs/components/text), and the primitives `components/primitives/use-render.tsx`, `components/primitives/wheel-picker.tsx`.

3. Copy the source into `components/ui/wheel-picker.tsx`:

```tsx title="nativewind/components/ui/wheel-picker.tsx"
import { cn } from "cn"
import type * as React from "react"
import { resolveClassName } from "@/components/primitives/use-render"
import * as WheelPickerPrimitive from "@/components/primitives/wheel-picker"
import { Text, TextClassContext } from "@/components/ui/text"

function WheelPicker({
  className,
  children,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Root>) {
  return (
    <WheelPickerPrimitive.Root
      className={(state) =>
        cn(
          "relative flex-row items-stretch justify-center",
          resolveClassName(className, state)
        )
      }
      {...props}
    >
      <WheelPickerPrimitive.Indicator className="rounded-lg bg-secondary" />
      {children}
    </WheelPickerPrimitive.Root>
  )
}

function WheelPickerColumn({
  className,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Column>) {
  return (
    <WheelPickerPrimitive.Column
      className={(state) =>
        cn("relative rounded-lg", resolveClassName(className, state))
      }
      {...props}
    />
  )
}

function WheelPickerItem({
  className,
  children,
  disabled = false,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Item>) {
  return (
    <TextClassContext.Provider
      value={cn(
        "text-xl text-foreground tabular-nums",
        disabled && "text-muted-foreground"
      )}
    >
      <WheelPickerPrimitive.Item
        disabled={disabled}
        className={(state) =>
          cn(
            "flex-row items-center justify-center px-3",
            resolveClassName(className, state)
          )
        }
        {...props}
      >
        {typeof children === "string" || typeof children === "number" ? (
          <Text numberOfLines={1}>{children}</Text>
        ) : (
          children
        )}
      </WheelPickerPrimitive.Item>
    </TextClassContext.Provider>
  )
}

export { WheelPicker, WheelPickerColumn, WheelPickerItem }
```

4. Update the import paths to match your project.

**StyleSheet**

1. Add the pieces it builds on: [Text](https://ui.suiss.app/docs/components/text), and the primitives `components/primitives/use-render.tsx`, `components/primitives/wheel-picker.tsx`.

2. Copy the source into `components/ui/wheel-picker.tsx`:

```tsx title="stylesheet/components/ui/wheel-picker.tsx"
import type * as React from "react"
import {
  type StyleProp,
  StyleSheet,
  type TextStyle,
  type ViewStyle,
} from "react-native"
import { resolveStyle } from "@/components/primitives/use-render"
import * as WheelPickerPrimitive from "@/components/primitives/wheel-picker"
import { Text, TextStyleContext } from "@/components/ui/text"
import { fontSize, radius, useTheme } from "@/components/ui/theme"

const styles = StyleSheet.create({
  root: {
    position: "relative",
    flexDirection: "row",
    alignItems: "stretch",
    justifyContent: "center",
  },
  indicator: { borderRadius: radius.lg },
  column: { position: "relative", borderRadius: radius.lg },
  item: {
    flexDirection: "row",
    alignItems: "center",
    justifyContent: "center",
    paddingHorizontal: 12,
  },
  text: { ...fontSize.xl, fontVariant: ["tabular-nums"] },
})

function WheelPicker({
  style,
  children,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Root>) {
  const { colors } = useTheme()
  return (
    <WheelPickerPrimitive.Root
      style={(state) => [
        styles.root,
        resolveStyle(style, state) as StyleProp<ViewStyle>,
      ]}
      {...props}
    >
      <WheelPickerPrimitive.Indicator
        style={[styles.indicator, { backgroundColor: colors.secondary }]}
      />
      {children}
    </WheelPickerPrimitive.Root>
  )
}

function WheelPickerColumn({
  style,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Column>) {
  return (
    <WheelPickerPrimitive.Column
      style={(state) => [
        styles.column,
        resolveStyle(style, state) as StyleProp<ViewStyle>,
      ]}
      {...props}
    />
  )
}

function WheelPickerItem({
  style,
  children,
  disabled = false,
  ...props
}: React.ComponentProps<typeof WheelPickerPrimitive.Item>) {
  const { colors } = useTheme()
  const textStyle: TextStyle = {
    ...styles.text,
    color: disabled ? colors.mutedForeground : colors.foreground,
  }
  return (
    <TextStyleContext.Provider value={textStyle}>
      <WheelPickerPrimitive.Item
        disabled={disabled}
        style={(state) => [
          styles.item,
          resolveStyle(style, state) as StyleProp<ViewStyle>,
        ]}
        {...props}
      >
        {typeof children === "string" || typeof children === "number" ? (
          <Text numberOfLines={1}>{children}</Text>
        ) : (
          children
        )}
      </WheelPickerPrimitive.Item>
    </TextStyleContext.Provider>
  )
}

export { WheelPicker, WheelPickerColumn, WheelPickerItem }
```

3. Update the import paths to match your project.

**SwiftUI**

1. Target iOS 17 or later.

2. Add the Swift package to your app:

```swift title="Package.swift"
.package(url: "https://github.com/phosphor-icons/swift", from: "2.1.0")
```

3. Copy the theme files every view uses:

- `swift/Theme/Theme.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Theme/Theme.swift)

- `swift/Theme/Tokens.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Theme/Tokens.swift)

4. Copy the source and every file it uses:

```swift title="swift/Components/WheelPicker.swift"
import SwiftUI

struct WheelPickerEntry: Equatable {
  let value: AnyHashable
  let disabled: Bool
  let text: Text?
}

struct WheelPickerEntriesKey: PreferenceKey {
  static var defaultValue: [WheelPickerEntry] { [] }

  static func reduce(value: inout [WheelPickerEntry], nextValue: () -> [WheelPickerEntry]) {
    value.append(contentsOf: nextValue())
  }
}

struct WheelPickerColumnContext {
  var alignment: Alignment
  var select: @MainActor (AnyHashable) -> Void
}

extension EnvironmentValues {
  @Entry var wheelPickerColumn: WheelPickerColumnContext?
  @Entry var wheelPickerItemInset: CGFloat = 12
}

enum WheelPickerMetrics {
  static let rowHeight: CGFloat = 32
  static let height: CGFloat = rowHeight * 6.75
  static let inset: CGFloat = (height - rowHeight) / 2
}

struct WheelPickerCurve: Equatable {
  static let rowAngle = Double.pi / 10.5
  static let maxAngle = Double.pi / 2
  static let perspective = 1200.0
  static let fadeAngle = 0.35

  let offset: Double
  let scaleX: Double
  let scaleY: Double
  let opacity: Double

  init(distance: Double, height: Double) {
    let radius = height / Self.rowAngle
    let angle = min(max(distance * Self.rowAngle, -Self.maxAngle), Self.maxAngle)
    let away = abs(distance)
    let tone = away < 1 ? 1 - away * 0.45 : 0.55 - (away - 1) * 0.06
    let fade = min(1, (Self.maxAngle - abs(angle)) / Self.fadeAngle)
    let depth = Self.perspective / (Self.perspective + radius - radius * cos(angle))
    offset = radius * sin(angle) - distance * height
    scaleX = depth
    scaleY = depth * cos(angle)
    opacity = max(0, tone * fade)
  }
}

enum WheelPickerNavigation {
  static func enabled(_ disabled: [Bool], from index: Int, step: Int) -> Int? {
    var current = index
    while current >= 0 && current < disabled.count {
      if !disabled[current] { return current }
      current += step
    }
    return nil
  }

  static func nearestEnabled(_ disabled: [Bool], from index: Int) -> Int? {
    for distance in 0..<max(disabled.count, 1) {
      let before = index - distance
      if before >= 0 && before < disabled.count && !disabled[before] { return before }
      let after = index + distance
      if after >= 0 && after < disabled.count && !disabled[after] { return after }
    }
    return nil
  }

  static func centered(offset: CGFloat, count: Int) -> Int {
    guard count > 0 else { return 0 }
    let index = Int((offset / WheelPickerMetrics.rowHeight).rounded())
    return min(max(index, 0), count - 1)
  }
}

struct WheelPickerSnap: ScrollTargetBehavior {
  let disabled: [Bool]

  func updateTarget(_ target: inout ScrollTarget, context: TargetContext) {
    let row = WheelPickerMetrics.rowHeight
    guard !disabled.isEmpty else {
      target.rect.origin.y = (target.rect.minY / row).rounded() * row
      return
    }
    let index = WheelPickerNavigation.centered(offset: target.rect.minY, count: disabled.count)
    let resolved = WheelPickerNavigation.nearestEnabled(disabled, from: index) ?? index
    target.rect.origin.y = CGFloat(resolved) * row
  }
}

public struct WheelPicker<Content: View>: View {
  let spacing: CGFloat
  let content: Content

  public init(spacing: CGFloat = 0, @ViewBuilder content: () -> Content) {
    self.spacing = spacing
    self.content = content()
  }

  public var body: some View {
    HStack(alignment: .center, spacing: spacing) {
      content
    }
    .frame(maxWidth: .infinity)
    .background {
      RoundedRectangle(cornerRadius: Radius.lg, style: .continuous)
        .fill(EsuissColor.secondary)
        .frame(height: WheelPickerMetrics.rowHeight)
    }
  }
}

public struct WheelPickerColumn<Value: Hashable & Sendable, Content: View>: View {
  let selection: Binding<Value>
  let alignment: HorizontalAlignment
  let content: Content

  @State private var entries: [WheelPickerEntry] = []
  @State private var offset: CGFloat = 0
  @State private var settling: Task<Void, Never>?
  @State private var ticks = 0
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    selection: Binding<Value>,
    alignment: HorizontalAlignment = .center,
    @ViewBuilder content: () -> Content
  ) {
    self.selection = selection
    self.alignment = alignment
    self.content = content()
  }

  public var body: some View {
    ScrollViewReader { proxy in
      ScrollView(.vertical, showsIndicators: false) {
        VStack(spacing: 0) {
          content
        }
        .padding(.vertical, WheelPickerMetrics.inset)
        .onGeometryChange(for: CGFloat.self) { geometry in
          geometry.frame(in: .scrollView).minY
        } action: { value in
          offset = -value
          scheduleSettle(proxy)
        }
      }
      .scrollTargetBehavior(WheelPickerSnap(disabled: entries.map(\.disabled)))
      .frame(height: WheelPickerMetrics.height)
      .fixedSize(horizontal: true, vertical: false)
      .clipShape(RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
      .hapticFeedback(.selection, trigger: ticks)
      .environment(\.wheelPickerColumn, WheelPickerColumnContext(
        alignment: Alignment(horizontal: alignment, vertical: .center),
        select: { value in
          if let next = value.base as? Value { commit(next) }
        }
      ))
      .onPreferenceChange(WheelPickerEntriesKey.self) { value in
        entries = value
      }
      .onAppear {
        proxy.scrollTo(selection.wrappedValue, anchor: .center)
      }
      .onChange(of: selection.wrappedValue) { _, value in
        guard centeredValue != AnyHashable(value) else { return }
        scroll(proxy, to: value)
      }
      .accessibilityElement(children: .ignore)
      .accessibilityValue(entries.first { $0.value == AnyHashable(selection.wrappedValue) }?.text ?? Text(verbatim: String(describing: selection.wrappedValue)))
      .accessibilityAdjustableAction { direction in
        let disabled = entries.map(\.disabled)
        guard let current = entries.firstIndex(where: { $0.value == AnyHashable(selection.wrappedValue) }) else { return }
        let target: Int?
        switch direction {
        case .increment: target = WheelPickerNavigation.enabled(disabled, from: current + 1, step: 1)
        case .decrement: target = WheelPickerNavigation.enabled(disabled, from: current - 1, step: -1)
        @unknown default: target = nil
        }
        if let target, let next = entries[target].value.base as? Value { commit(next) }
      }
    }
  }

  private var centeredValue: AnyHashable? {
    guard !entries.isEmpty else { return nil }
    return entries[WheelPickerNavigation.centered(offset: offset, count: entries.count)].value
  }

  private func commit(_ value: Value) {
    if selection.wrappedValue != value {
      selection.wrappedValue = value
      ticks += 1
    }
  }

  private func scroll(_ proxy: ScrollViewProxy, to value: Value) {
    if reduceMotion {
      proxy.scrollTo(value, anchor: .center)
    } else {
      withAnimation(.timingCurve(0.32, 0.72, 0, 1, duration: 0.3)) {
        proxy.scrollTo(value, anchor: .center)
      }
    }
  }

  private func scheduleSettle(_ proxy: ScrollViewProxy) {
    settling?.cancel()
    settling = Task { @MainActor in
      try? await Task.sleep(for: .milliseconds(150))
      guard !Task.isCancelled else { return }
      settle(proxy)
    }
  }

  private func settle(_ proxy: ScrollViewProxy) {
    guard !entries.isEmpty else { return }
    let centered = WheelPickerNavigation.centered(offset: offset, count: entries.count)
    guard let index = WheelPickerNavigation.nearestEnabled(entries.map(\.disabled), from: centered),
      let next = entries[index].value.base as? Value
    else { return }
    if index != centered { scroll(proxy, to: next) }
    commit(next)
  }
}

public struct WheelPickerItem<Value: Hashable & Sendable, Label: View>: View {
  let value: Value
  let text: Text?
  let label: Label

  @Environment(\.wheelPickerColumn) private var column
  @Environment(\.wheelPickerItemInset) private var inset
  @Environment(\.isEnabled) private var isEnabled

  public init(value: Value, @ViewBuilder label: () -> Label) {
    self.value = value
    text = nil
    self.label = label()
  }

  init(value: Value, text: Text, label: Label) {
    self.value = value
    self.text = text
    self.label = label
  }

  public var body: some View {
    label
      .scaledFont(TextStyle.xl)
      .monospacedDigit()
      .lineLimit(1)
      .fixedSize()
      .foregroundStyle(isEnabled ? EsuissColor.foreground : EsuissColor.mutedForeground)
      .visualEffect { content, geometry in
        let row = Double(WheelPickerMetrics.rowHeight)
        let center = Double(WheelPickerMetrics.height) / 2
        let distance = (Double(geometry.frame(in: .scrollView).midY) - center) / row
        let curve = WheelPickerCurve(distance: distance, height: row)
        return content
          .scaleEffect(x: curve.scaleX, y: curve.scaleY)
          .offset(y: curve.offset)
          .opacity(curve.opacity)
      }
      .padding(.horizontal, inset)
      .frame(maxWidth: .infinity, alignment: column?.alignment ?? .center)
      .frame(height: WheelPickerMetrics.rowHeight)
      .contentShape(Rectangle())
      .onTapGesture {
        if isEnabled { column?.select(AnyHashable(value)) }
      }
      .id(value)
      .preference(key: WheelPickerEntriesKey.self, value: [WheelPickerEntry(value: AnyHashable(value), disabled: !isEnabled, text: text)])
  }
}

extension WheelPickerItem where Label == Text {
  public init(_ title: LocalizedStringKey, value: Value) {
    self.init(value: value, text: Text(title), label: Text(title))
  }

  public init(verbatim title: String, value: Value) {
    self.init(value: value, text: Text(verbatim: title), label: Text(verbatim: title))
  }
}
```

- `swift/Components/Button.swift`: see [Button](https://ui.suiss.app/docs/components/button.md)

- `swift/Components/ButtonGroup.swift`: see [Button Group](https://ui.suiss.app/docs/components/button-group.md)

- `swift/Components/DropdownMenu.swift`: see [Dropdown Menu](https://ui.suiss.app/docs/components/dropdown-menu.md)

- `swift/Components/Field.swift`: see [Field](https://ui.suiss.app/docs/components/field.md)

- `swift/Components/Haptics.swift`: see [Haptics](https://ui.suiss.app/docs/components/haptics.md)

- `swift/Components/Overlay.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Components/Overlay.swift)

- `swift/Components/Select.swift`: see [Select](https://ui.suiss.app/docs/components/select.md)

- `swift/Components/Separator.swift`: see [Separator](https://ui.suiss.app/docs/components/separator.md)

- `swift/Components/TextVariant.swift`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/swiftui/Sources/EsuissUI/Components/TextVariant.swift)

5. Add the files to your app target.

**Jetpack Compose**

1. Set `minSdk` to 24 or higher and add the dependencies:

```kotlin title="build.gradle.kts"
implementation(platform("androidx.compose:compose-bom:2026.09.00"))
implementation("androidx.compose.foundation:foundation")
implementation("androidx.compose.ui:ui")
```

2. Copy the theme files every view uses:

- `kotlin/theme/Theme.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/theme/Theme.kt)

- `kotlin/theme/Tokens.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/theme/Tokens.kt)

3. Copy the source and every file it uses:

```kt title="kotlin/components/WheelPicker.kt"
package com.esuiss.ui.components

import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.gestures.snapping.SnapPosition
import androidx.compose.foundation.gestures.snapping.rememberSnapFlingBehavior
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentWidth
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.LazyListState
import androidx.compose.foundation.lazy.itemsIndexed
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberUpdatedState
import androidx.compose.runtime.snapshotFlow
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.semantics.ProgressBarRangeInfo
import androidx.compose.ui.semantics.clearAndSetSemantics
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.progressBarRangeInfo
import androidx.compose.ui.semantics.setProgress
import androidx.compose.ui.semantics.stateDescription
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography
import kotlin.math.PI
import kotlin.math.abs
import kotlin.math.cos
import kotlin.math.max
import kotlin.math.min
import kotlin.math.roundToInt
import kotlin.math.sin
import kotlinx.coroutines.flow.drop
import kotlinx.coroutines.flow.filter

private val WheelItemHeight = 32.dp

private const val RowAngle = (PI / 10.5).toFloat()

private const val MaxAngle = (PI / 2).toFloat()

private const val Perspective = 1200f

private const val FadeAngle = 0.35f

@Immutable
private class WheelEntry(
    val value: String,
    val text: String?,
    val enabled: Boolean,
    val content: @Composable () -> Unit,
)

interface WheelPickerColumnScope {
    fun WheelPickerItem(value: String, enabled: Boolean = true, content: @Composable () -> Unit)

    fun WheelPickerItem(value: String, text: String, enabled: Boolean = true)
}

private class WheelPickerColumnScopeImpl : WheelPickerColumnScope {
    val entries = mutableListOf<WheelEntry>()

    override fun WheelPickerItem(value: String, enabled: Boolean, content: @Composable () -> Unit) {
        entries += WheelEntry(value, null, enabled, content)
    }

    override fun WheelPickerItem(value: String, text: String, enabled: Boolean) {
        entries += WheelEntry(value, text, enabled) {
            BasicText(text, style = LocalContentStyle.current, maxLines = 1, softWrap = false)
        }
    }
}

@Composable
fun WheelPicker(
    modifier: Modifier = Modifier,
    horizontalArrangement: Arrangement.Horizontal = Arrangement.Center,
    content: @Composable RowScope.() -> Unit,
) {
    Box(modifier = modifier, contentAlignment = Alignment.Center) {
        Box(
            modifier = Modifier
                .fillMaxWidth()
                .height(WheelItemHeight)
                .background(EsuissTheme.colors.secondary, RoundedCornerShape(Radius.lg)),
        )
        Row(
            horizontalArrangement = horizontalArrangement,
            verticalAlignment = Alignment.CenterVertically,
            content = content,
        )
    }
}

@Composable
fun WheelPickerColumn(
    value: String?,
    onValueChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    label: String? = null,
    horizontalAlignment: Alignment.Horizontal = Alignment.CenterHorizontally,
    itemPadding: Dp = 12.dp,
    content: WheelPickerColumnScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val entries = WheelPickerColumnScopeImpl().apply(content).entries.toList()
    val selectedIndex = entries.indexOfFirst { it.value == value }
    val state = rememberLazyListState(initialFirstVisibleItemIndex = selectedIndex.coerceAtLeast(0))
    val fling = rememberSnapFlingBehavior(state, SnapPosition.Center)
    val reducedMotion = formReducedMotion()
    val currentValue by rememberUpdatedState(value)
    val currentEntries by rememberUpdatedState(entries)
    val haptics = rememberHaptics()
    val select: (String) -> Unit = {
        if (it != value) haptics.selection()
        onValueChange(it)
    }
    val currentOnValueChange by rememberUpdatedState(select)

    LaunchedEffect(state) {
        snapshotFlow { state.isScrollInProgress }
            .drop(1)
            .filter { !it }
            .collect {
                val list = currentEntries
                if (list.isEmpty()) return@collect
                val centered = state.wheelPosition().roundToInt().coerceIn(0, list.lastIndex)
                val index = nearestEnabledIndex(list, centered)
                if (index < 0) return@collect
                if (index != centered) {
                    if (reducedMotion) state.scrollToItem(index) else state.animateScrollToItem(index)
                }
                if (list[index].value != currentValue) currentOnValueChange(list[index].value)
            }
    }

    LaunchedEffect(value, entries.size) {
        if (selectedIndex < 0 || state.isScrollInProgress) return@LaunchedEffect
        if (state.layoutInfo.visibleItemsInfo.isEmpty()) {
            state.scrollToItem(selectedIndex)
            return@LaunchedEffect
        }
        if (selectedIndex == state.wheelPosition().roundToInt()) return@LaunchedEffect
        if (reducedMotion) state.scrollToItem(selectedIndex) else state.animateScrollToItem(selectedIndex)
    }

    val itemStyle = Typography.xl.copy(fontFeatureSettings = "tnum")
    Box(modifier = modifier.height(WheelItemHeight * 6.75f)) {
        Layout(
            content = {
                entries.forEach { entry ->
                    Box(Modifier.padding(horizontal = itemPadding)) {
                        CompositionLocalProvider(LocalContentStyle provides itemStyle) { entry.content() }
                    }
                }
            },
        ) { measurables, constraints ->
            val width = measurables.maxOfOrNull { it.maxIntrinsicWidth(WheelItemHeight.roundToPx()) } ?: 0
            layout(width.coerceIn(constraints.minWidth, constraints.maxWidth), 0) {}
        }
        LazyColumn(
            state = state,
            flingBehavior = fling,
            contentPadding = PaddingValues(vertical = WheelItemHeight * 2.875f),
            horizontalAlignment = horizontalAlignment,
            modifier = Modifier
                .matchParentSize()
                .clip(RoundedCornerShape(Radius.lg))
                .clearAndSetSemantics {
                    if (label != null) contentDescription = label
                    if (selectedIndex >= 0) {
                        stateDescription = entries[selectedIndex].text ?: entries[selectedIndex].value
                    }
                    if (entries.isNotEmpty()) {
                        val last = entries.lastIndex
                        progressBarRangeInfo = ProgressBarRangeInfo(
                            selectedIndex.coerceAtLeast(0).toFloat(),
                            0f..last.toFloat().coerceAtLeast(1f),
                            max(0, last - 1),
                        )
                        setProgress { target ->
                            val current = selectedIndex.coerceAtLeast(0)
                            val wanted = target.roundToInt().coerceIn(0, last)
                            val index = when {
                                wanted > current -> enabledIndex(entries, wanted, 1)
                                wanted < current -> enabledIndex(entries, wanted, -1)
                                else -> -1
                            }
                            if (index >= 0) select(entries[index].value)
                            index >= 0
                        }
                    }
                },
        ) {
            itemsIndexed(entries, key = { _, entry -> entry.value }) { index, entry ->
                Box(
                    modifier = Modifier
                        .height(WheelItemHeight)
                        .fillMaxWidth()
                        .clickable(interactionSource = null, indication = null, enabled = entry.enabled) {
                            select(entry.value)
                        }
                        .padding(horizontal = itemPadding),
                    contentAlignment = Alignment.CenterStart,
                ) {
                    Box(
                        modifier = Modifier
                            .align(Alignment.Center)
                            .fillMaxWidth()
                            .wrapContentWidth(horizontalAlignment, unbounded = true)
                            .graphicsLayer {
                                val distance = index - state.wheelPosition()
                                val height = WheelItemHeight.value
                                val radius = height / RowAngle
                                val angle = (distance * RowAngle).coerceIn(-MaxAngle, MaxAngle)
                                val offset = abs(distance)
                                val tone = if (offset < 1f) 1f - offset * 0.45f else 0.55f - (offset - 1f) * 0.06f
                                val fade = min(1f, (MaxAngle - abs(angle)) / FadeAngle)
                                val depth = Perspective / (Perspective + radius - radius * cos(angle))
                                translationY = (radius * sin(angle) - distance * height) * density
                                scaleX = depth
                                scaleY = depth * cos(angle)
                                alpha = max(0f, tone * fade)
                            },
                    ) {
                        CompositionLocalProvider(
                            LocalContentStyle provides itemStyle.copy(
                                color = if (entry.enabled) colors.foreground else colors.mutedForeground,
                            ),
                            LocalContentColor provides if (entry.enabled) colors.foreground else colors.mutedForeground,
                        ) {
                            entry.content()
                        }
                    }
                }
            }
        }
    }
}

private fun LazyListState.wheelPosition(): Float {
    val info = layoutInfo
    val first = info.visibleItemsInfo.firstOrNull() ?: return firstVisibleItemIndex.toFloat()
    if (first.size == 0) return first.index.toFloat()
    val center = (info.viewportStartOffset + info.viewportEndOffset) / 2f
    return first.index - (first.offset - center) / first.size - 0.5f
}

private fun enabledIndex(entries: List<WheelEntry>, from: Int, step: Int): Int {
    var index = from
    while (index >= 0 && index < entries.size) {
        if (entries[index].enabled) return index
        index += step
    }
    return -1
}

private fun nearestEnabledIndex(entries: List<WheelEntry>, from: Int): Int {
    for (distance in entries.indices) {
        if (entries.getOrNull(from - distance)?.enabled == true) return from - distance
        if (entries.getOrNull(from + distance)?.enabled == true) return from + distance
    }
    return -1
}
```

- `kotlin/components/Content.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/components/Content.kt)

- `kotlin/components/FormSupport.kt`: [source](https://github.com/e-suiss/ui/blob/main/packages/mobile/kotlin/ui/src/main/kotlin/com/esuiss/ui/components/FormSupport.kt)

- `kotlin/components/Haptics.kt`: see [Haptics](https://ui.suiss.app/docs/components/haptics.md)

4. Update the `com.esuiss.ui` package names to match your project.

## Usage

```tsx
import { WheelPicker, WheelPickerColumn, WheelPickerItem } from "@/components/ui/wheel-picker"
```

```tsx
<View className="w-80 rounded-2xl border border-foreground/5 bg-card p-4 shadow-md dark:border-foreground/10">
  <WheelPicker>
    <WheelPickerColumn accessibilityLabel="Fruit" defaultValue="Lemon">
      {fruits.map((fruit) => (
        <WheelPickerItem key={fruit} value={fruit}>
          {fruit}
        </WheelPickerItem>
      ))}
    </WheelPickerColumn>
  </WheelPicker>
</View>
```

Give each column a `defaultValue`, or `value` with `onValueChange`, and fill it with `WheelPickerItem` components that each have a unique `value`. Plain string or number children are wrapped in single-line `Text`.

The value is set when scrolling settles or when an item is pressed. Disabled items are skipped: if the wheel stops on one, it moves to the nearest enabled item.

Combine several columns for compound values such as day, hour and minute, and use `className` on columns and items to control width and alignment. Set `itemHeight` on `WheelPicker` to change the row height.

## Examples

### Disabled items

A time list where booked slots are disabled and skipped.

![Preview](https://ui.suiss.app/previews/components-wheel-picker--disabled-items.light.webp)

```tsx
import { View } from "react-native"
import { WheelPicker, WheelPickerColumn, WheelPickerItem } from "@/components/ui/wheel-picker"

const slots = Array.from({ length: 11 }, (_, index) => {
  const minutes = 18 * 60 + index * 30
  return `${Math.floor(minutes / 60)}:${String(minutes % 60).padStart(2, "0")}`
})

const booked = new Set(["19:30", "20:00", "20:30"])

const minutes = Array.from({ length: 12 }, (_, step) =>
  String(step * 5).padStart(2, "0")
)

export function WheelPickerDisabledItemsExample() {
  return (
    <View className="w-80 rounded-2xl border border-foreground/5 bg-card p-4 shadow-md dark:border-foreground/10">
      <WheelPicker>
        <WheelPickerColumn
          accessibilityLabel="Reservation time"
          defaultValue="19:00"
        >
          {slots.map((slot) => (
            <WheelPickerItem key={slot} value={slot} disabled={booked.has(slot)}>
              {slot}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct WheelPickerDisabledItemsExample: View {
  var body: some View {
    WheelPickerFrame {
      SlotsDemo()
    }
  }
}

struct WheelPickerFrame<Content: View>: View {
  @ViewBuilder let content: () -> Content

  @Environment(\.colorScheme) private var colorScheme

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
    content()
      .padding(16)
      .frame(width: 320)
      .background(EsuissColor.card, in: shape)
      .overlay {
        shape.strokeBorder(EsuissColor.foreground.opacity(colorScheme == .dark ? 0.1 : 0.05))
      }
      .shadow(Shadow.md)
  }
}

let wheelSlots: [String] = (0..<11).map { index in
  let minutes = 18 * 60 + index * 30
  return String(format: "%d:%02d", minutes / 60, minutes % 60)
}

let wheelBooked: Set<String> = ["19:30", "20:00", "20:30"]

struct SlotsDemo: View {
  @State private var slot = "19:00"

  var body: some View {
    WheelPicker {
      WheelPickerColumn(selection: $slot) {
        ForEach(wheelSlots, id: \.self) { item in
          WheelPickerItem(verbatim: item, value: item)
            .disabled(wheelBooked.contains(item))
        }
      }
      .accessibilityLabel(Text("Reservation time"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.WheelPicker
import com.esuiss.ui.components.WheelPickerColumn
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.shadow

@Composable
fun WheelPickerDisabledItemsExample() {
    WheelPickerFrame { WheelPickerDisabledItems() }
}

val wheelPickerSlots = List(11) { index ->
    val minutes = 18 * 60 + index * 30
    "${minutes / 60}:${(minutes % 60).toString().padStart(2, '0')}"
}

val wheelPickerBooked = setOf("19:30", "20:00", "20:30")

@Composable
fun WheelPickerFrame(content: @Composable () -> Unit) {
    val colors = EsuissTheme.colors
    val shape = RoundedCornerShape(Radius.xl2)
    Box(
        Modifier
            .width(320.dp)
            .shadow(Shadows.md, shape)
            .background(colors.card, shape)
            .border(1.dp, colors.foreground.copy(alpha = if (colors.isDark) 0.1f else 0.05f), shape)
            .padding(16.dp),
    ) {
        content()
    }
}

@Composable
fun WheelPickerDisabledItems() {
    var value by rememberSaveable { mutableStateOf("19:00") }
    WheelPicker(Modifier.fillMaxWidth()) {
        WheelPickerColumn(value, { value = it }, label = "Reservation time") {
            wheelPickerSlots.forEach { WheelPickerItem(it, it, enabled = it !in wheelPickerBooked) }
        }
    }
}
```

### Date time

Controlled day, hour and minute columns combined into one value.

![Preview](https://ui.suiss.app/previews/components-wheel-picker--date-time.light.webp)

```tsx
import * as React from "react"
import { View } from "react-native"
import { Text } from "@/components/ui/text"
import { WheelPicker, WheelPickerColumn, WheelPickerItem } from "@/components/ui/wheel-picker"

function toDayValue(date: Date) {
  return [
    date.getFullYear(),
    String(date.getMonth() + 1).padStart(2, "0"),
    String(date.getDate()).padStart(2, "0"),
  ].join("-")
}

const today = new Date(2026, 9, 4)

const days = Array.from({ length: 15 }, (_, index) => {
  const date = new Date(
    today.getFullYear(),
    today.getMonth(),
    today.getDate() + index - 7
  )
  const label =
    index === 7
      ? "Today"
      : date.toLocaleDateString("en-US", {
          weekday: "short",
          month: "short",
          day: "numeric",
        })
  return { value: toDayValue(date), label }
})

const hours = Array.from({ length: 24 }, (_, hour) =>
  String(hour).padStart(2, "0")
)

const minutes = Array.from({ length: 12 }, (_, step) =>
  String(step * 5).padStart(2, "0")
)

function DateTimeExample() {
  const [day, setDay] = React.useState(toDayValue(today))
  const [hour, setHour] = React.useState("19")
  const [minute, setMinute] = React.useState("30")

  return (
    <View className="gap-3">
      <WheelPicker>
        <WheelPickerColumn
          accessibilityLabel="Day"
          value={day}
          onValueChange={setDay}
          className="grow-[1.6]"
        >
          {days.map(({ value, label }) => (
            <WheelPickerItem key={value} value={value} className="justify-end">
              {label}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
        <WheelPickerColumn
          accessibilityLabel="Hour"
          value={hour}
          onValueChange={setHour}
        >
          {hours.map((value) => (
            <WheelPickerItem key={value} value={value}>
              {value}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
        <WheelPickerColumn
          accessibilityLabel="Minute"
          value={minute}
          onValueChange={setMinute}
          className="grow"
        >
          {minutes.map((value) => (
            <WheelPickerItem
              key={value}
              value={value}
              className="justify-start"
            >
              {value}
            </WheelPickerItem>
          ))}
        </WheelPickerColumn>
      </WheelPicker>
      <Text className="text-center text-sm text-muted-foreground tabular-nums">
        {day} {hour}:{minute}
      </Text>
    </View>
  )
}

export function WheelPickerDateTimeExample() {
  return (
    <View className="w-80 rounded-2xl border border-foreground/5 bg-card p-4 shadow-md dark:border-foreground/10">
      <DateTimeExample />
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct WheelPickerDateTimeExample: View {
  var body: some View {
    WheelPickerFrame {
      DateTimeDemo()
    }
  }
}

struct WheelPickerFrame<Content: View>: View {
  @ViewBuilder let content: () -> Content

  @Environment(\.colorScheme) private var colorScheme

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
    content()
      .padding(16)
      .frame(width: 320)
      .background(EsuissColor.card, in: shape)
      .overlay {
        shape.strokeBorder(EsuissColor.foreground.opacity(colorScheme == .dark ? 0.1 : 0.05))
      }
      .shadow(Shadow.md)
  }
}

struct WheelDay {
  let value: String
  let label: String
}

let wheelDays: [WheelDay] = {
  var calendar = Calendar(identifier: .gregorian)
  calendar.timeZone = TimeZone(identifier: "UTC") ?? .current
  let today = calendar.date(from: DateComponents(year: 2026, month: 10, day: 4)) ?? .now
  let label = Date.FormatStyle(timeZone: calendar.timeZone)
    .weekday(.abbreviated)
    .month(.abbreviated)
    .day()
    .locale(Locale(identifier: "en_US"))
  return (0..<15).map { index in
    let date = calendar.date(byAdding: .day, value: index - 7, to: today) ?? today
    let parts = calendar.dateComponents([.year, .month, .day], from: date)
    let value = String(format: "%04d-%02d-%02d", parts.year ?? 0, parts.month ?? 0, parts.day ?? 0)
    return WheelDay(value: value, label: index == 7 ? "Today" : date.formatted(label))
  }
}()

let wheelHours = (0..<24).map { String(format: "%02d", $0) }

let wheelMinutes = (0..<12).map { String(format: "%02d", $0 * 5) }

struct DateTimeDemo: View {
  @State private var day = "2026-10-04"
  @State private var hour = "19"
  @State private var minute = "30"

  var body: some View {
    VStack(spacing: 12) {
      WheelPicker {
        WheelPickerColumn(selection: $day, alignment: .trailing) {
          ForEach(wheelDays, id: \.value) { item in
            WheelPickerItem(verbatim: item.label, value: item.value)
          }
        }
        .frame(minWidth: 150, maxWidth: .infinity, alignment: .trailing)
        .accessibilityLabel(Text("Day"))
        WheelPickerColumn(selection: $hour) {
          ForEach(wheelHours, id: \.self) { item in
            WheelPickerItem(verbatim: item, value: item)
          }
        }
        .accessibilityLabel(Text("Hour"))
        WheelPickerColumn(selection: $minute, alignment: .leading) {
          ForEach(wheelMinutes, id: \.self) { item in
            WheelPickerItem(verbatim: item, value: item)
          }
        }
        .frame(maxWidth: .infinity, alignment: .leading)
        .accessibilityLabel(Text("Minute"))
      }
      Text(verbatim: "\(day) \(hour):\(minute)")
        .textStyle(.sm)
        .monospacedDigit()
        .foregroundStyle(EsuissColor.mutedForeground)
        .multilineTextAlignment(.center)
        .frame(maxWidth: .infinity)
    }
  }
}
```

```kotlin
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.Text
import com.esuiss.ui.components.WheelPicker
import com.esuiss.ui.components.WheelPickerColumn
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Shadows
import com.esuiss.ui.theme.Typography
import com.esuiss.ui.theme.shadow
import java.text.SimpleDateFormat
import java.util.Calendar
import java.util.Locale

@Composable
fun WheelPickerDateTimeExample() {
    WheelPickerFrame { WheelPickerDateTime() }
}

class WheelPickerDay(val value: String, val label: String)

val wheelPickerDays: List<WheelPickerDay> = run {
    val format = SimpleDateFormat("EEE, MMM d", Locale.US)
    val key = SimpleDateFormat("yyyy-MM-dd", Locale.US)
    List(15) { index ->
        val calendar = Calendar.getInstance(Locale.US)
        calendar.clear()
        calendar.set(2026, Calendar.OCTOBER, 4 + index - 7)
        WheelPickerDay(key.format(calendar.time), if (index == 7) "Today" else format.format(calendar.time))
    }
}

val wheelPickerHours = List(24) { it.toString().padStart(2, '0') }

val wheelPickerMinutes = List(12) { (it * 5).toString().padStart(2, '0') }

@Composable
fun WheelPickerFrame(content: @Composable () -> Unit) {
    val colors = EsuissTheme.colors
    val shape = RoundedCornerShape(Radius.xl2)
    Box(
        Modifier
            .width(320.dp)
            .shadow(Shadows.md, shape)
            .background(colors.card, shape)
            .border(1.dp, colors.foreground.copy(alpha = if (colors.isDark) 0.1f else 0.05f), shape)
            .padding(16.dp),
    ) {
        content()
    }
}

@Composable
fun WheelPickerDateTime() {
    var day by rememberSaveable { mutableStateOf(wheelPickerDays[7].value) }
    var hour by rememberSaveable { mutableStateOf("19") }
    var minute by rememberSaveable { mutableStateOf("30") }
    Column(Modifier.fillMaxWidth(), verticalArrangement = Arrangement.spacedBy(12.dp)) {
        WheelPicker(Modifier.fillMaxWidth()) {
            WheelPickerColumn(
                day,
                { day = it },
                Modifier.weight(1.6f),
                label = "Day",
                horizontalAlignment = Alignment.End,
            ) {
                wheelPickerDays.forEach { WheelPickerItem(it.value, it.label) }
            }
            WheelPickerColumn(hour, { hour = it }, label = "Hour") {
                wheelPickerHours.forEach { WheelPickerItem(it, it) }
            }
            WheelPickerColumn(
                minute,
                { minute = it },
                Modifier.weight(1f),
                label = "Minute",
                horizontalAlignment = Alignment.Start,
            ) {
                wheelPickerMinutes.forEach { WheelPickerItem(it, it) }
            }
        }
        Text(
            "$day $hour:$minute",
            modifier = Modifier.fillMaxWidth(),
            style = Typography.sm.copy(fontFeatureSettings = "tnum"),
            color = EsuissTheme.colors.mutedForeground,
            textAlign = TextAlign.Center,
        )
    }
}
```

## API Reference

### WheelPicker

Root row of columns with the selection highlight.

Also accepts the props of `React.ComponentProps<typeof WheelPickerPrimitive.Root>`.

### WheelPickerColumn

Snapping scroll column that holds one value.

Also accepts the props of `React.ComponentProps<typeof WheelPickerPrimitive.Column>`.

### WheelPickerItem

Single row in a column.

Also accepts the props of `React.ComponentProps<typeof WheelPickerPrimitive.Item>`.

## Accessibility

- Each column has the `adjustable` role and announces the selected item's label as its value.
- VoiceOver and TalkBack users swipe up or down to move to the next or previous enabled item.
- Give each column an `accessibilityLabel`, such as `Hour` or `Minute`.
- The highlight band is hidden from screen readers.

## Notes

- A selection haptic plays when the value changes, if a haptics adapter is provided through the haptics context.
- The highlight uses `bg-secondary`; items use `text-xl text-foreground` with tabular numbers and `text-muted-foreground` when disabled.
- Light and dark colors follow the system appearance.