# Toggle Group

A set of toggles that share one value, for formatting controls, alignment options and segmented controls.

Toggle Group is an open-source mobile component from suiss/uim for React Native and Expo, with SwiftUI and Jetpack Compose versions built from the same design tokens. The @esuiss/uim CLI copies its source into your project, so you own the code.

Source: https://uim.suiss.app/docs/components/toggle-group

![Preview](https://uim.suiss.app/previews/components-toggle-group--default.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupExample() {
  return (
    <FormattingDemo />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

`ToggleGroup` is built on the toggle group primitive and lays out `ToggleGroupItem` toggles in a row or a column. Items take the same `variant` and `size` styles as Toggle. The `spacing` prop sets the gap between items in steps of 4 points.

With `spacing={0}`, the group changes shape: the `default` variant becomes a segmented control on a `bg-control` track, and the `outline` variant joins items into one bordered strip. In a single-selection segmented control, the selected item is marked by a raised indicator that slides to the new item when the selection changes, like Tabs. In a `multiple` segmented control, each pressed item is raised on its own. Use the segmented style for switching views and the spaced style for toolbars.

## Installation

```bash title="Terminal"
npx @esuiss/uim@latest add toggle-group
```

```bash title="Terminal"
npx @esuiss/uim@latest add toggle-group --platform swift
```

```bash title="Terminal"
npx @esuiss/uim@latest add toggle-group --platform kotlin
```

The CLI also adds what it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), [Toggle](/docs/components/toggle).

### Manual

**Uniwind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), [Toggle](/docs/components/toggle), and the primitives `components/primitives/toggle.tsx`, `components/primitives/toggle-group.tsx`, `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/toggle-group.tsx`:

```tsx title="uniwind/components/ui/toggle-group.tsx"
import type { VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import { Pressable } from "react-native"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import {
  Toggle as TogglePrimitive,
  type ToggleState,
} from "@/components/primitives/toggle"
import {
  ToggleGroupIndicator as ToggleGroupIndicatorPrimitive,
  ToggleGroup as ToggleGroupPrimitive,
  useToggleGroupContext,
} from "@/components/primitives/toggle-group"
import type { Orientation } from "@/components/primitives/types"
import { resolveClassName } from "@/components/primitives/use-render"
import { Icon } from "@/components/ui/icon"
import { TextClassContext } from "@/components/ui/text"
import {
  toggleStateClassName,
  toggleTextClassName,
  toggleVariants,
} from "@/components/ui/toggle"

type ToggleGroupContextValue = VariantProps<typeof toggleVariants> & {
  spacing: number
  orientation: Orientation
}

const ToggleGroupContext = React.createContext<ToggleGroupContextValue>({
  variant: "default",
  size: "default",
  spacing: 2,
  orientation: "horizontal",
})

const ItemPositionContext = React.createContext({ first: true, last: true })

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

const SEGMENTED_SELECTED_CLASS_NAME =
  "bg-surface-raised shadow-sm dark:bg-label-quaternary"

function ToggleGroupIndicator() {
  return (
    <ToggleGroupIndicatorPrimitive
      className={cn("rounded-md", SEGMENTED_SELECTED_CLASS_NAME)}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function ToggleGroup({
  className,
  style,
  variant = "default",
  size = "default",
  spacing = 2,
  orientation = "horizontal",
  multiple,
  children,
  ...props
}: React.ComponentProps<typeof ToggleGroupPrimitive> &
  VariantProps<typeof toggleVariants> & {
    spacing?: number
  }) {
  const segmented = spacing === 0 && variant === "default"
  const items = React.Children.toArray(children)
  const context = React.useMemo(
    () => ({ variant, size, spacing, orientation }),
    [variant, size, spacing, orientation]
  )
  return (
    <ToggleGroupPrimitive
      orientation={orientation}
      multiple={multiple}
      className={(state) =>
        cn(
          "relative flex-row items-center self-start",
          orientation === "vertical" && "flex-col items-stretch",
          spacing === 0 && variant === "outline" && "rounded-lg",
          segmented && "rounded-xl bg-control p-1",
          resolveClassName(className, state)
        )
      }
      style={(state) => [
        { gap: segmented ? 4 : spacing * 4 },
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    >
      {segmented && !multiple ? <ToggleGroupIndicator /> : null}
      <ToggleGroupContext.Provider value={context}>
        {items.map((child, index) => (
          <ItemPositionContext.Provider
            key={React.isValidElement(child) ? child.key : index}
            value={{ first: index === 0, last: index === items.length - 1 }}
          >
            {child}
          </ItemPositionContext.Provider>
        ))}
      </ToggleGroupContext.Provider>
    </ToggleGroupPrimitive>
  )
}

function itemClassName(
  context: ToggleGroupContextValue,
  position: { first: boolean; last: boolean },
  state: ToggleState,
  multiple: boolean
) {
  const vertical = context.orientation === "vertical"
  if (context.spacing === 0 && context.variant === "default") {
    return cn(
      "rounded-md px-3",
      state.pressed &&
        (state.disabled
          ? "bg-control-disabled"
          : multiple && SEGMENTED_SELECTED_CLASS_NAME)
    )
  }
  return cn(
    toggleStateClassName(state),
    context.spacing === 0 &&
      cn(
        "rounded-none",
        vertical
          ? cn(
              position.first && "rounded-t-xl",
              position.last && "rounded-b-xl"
            )
          : cn(
              position.first && "rounded-l-lg",
              position.last && "rounded-r-lg"
            ),
        context.variant === "outline" &&
          !position.first &&
          (vertical ? "border-t-0" : "border-l-0")
      )
  )
}

function itemTextClassName(
  context: ToggleGroupContextValue,
  state: ToggleState
) {
  if (context.spacing === 0 && context.variant === "default") {
    return cn(
      "text-sm",
      state.disabled
        ? "text-label-quaternary"
        : state.pressed
          ? "text-label"
          : "text-label-secondary"
    )
  }
  return toggleTextClassName(state)
}

function ToggleGroupItem({
  className,
  children,
  variant,
  size,
  ...props
}: React.ComponentProps<typeof TogglePrimitive> &
  VariantProps<typeof toggleVariants>) {
  const context = React.useContext(ToggleGroupContext)
  const position = React.useContext(ItemPositionContext)
  const multiple = useToggleGroupContext()?.multiple ?? false
  const resolved = {
    ...context,
    variant: context.variant || variant,
    size: context.size || size,
  }

  return (
    <TogglePrimitive
      className={(state) =>
        cn(
          "shrink-0",
          toggleVariants({ variant: resolved.variant, size: resolved.size }),
          itemClassName(resolved, position, state, multiple),
          resolveClassName(className, state)
        )
      }
      render={(renderProps, state) => (
        <TextClassContext.Provider value={itemTextClassName(resolved, state)}>
          <Pressable {...renderProps} />
        </TextClassContext.Provider>
      )}
      {...props}
    >
      {children}
    </TogglePrimitive>
  )
}

function ToggleGroupIcon({
  className,
  ...props
}: React.ComponentProps<typeof Icon>) {
  return <Icon className={cn("size-4 shrink-0", className)} {...props} />
}

export { ToggleGroup, ToggleGroupIcon, ToggleGroupItem }
```

4. Update the import paths to match your project.

**NativeWind**

1. Install the dependencies:

```bash title="Terminal"
npx expo install class-variance-authority cn react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), [Toggle](/docs/components/toggle), and the primitives `components/primitives/toggle.tsx`, `components/primitives/toggle-group.tsx`, `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/toggle-group.tsx`:

```tsx title="nativewind/components/ui/toggle-group.tsx"
import type { VariantProps } from "class-variance-authority"
import { cn } from "cn"
import * as React from "react"
import { Pressable } from "react-native"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import {
  Toggle as TogglePrimitive,
  type ToggleState,
} from "@/components/primitives/toggle"
import {
  ToggleGroupIndicator as ToggleGroupIndicatorPrimitive,
  ToggleGroup as ToggleGroupPrimitive,
  useToggleGroupContext,
} from "@/components/primitives/toggle-group"
import type { Orientation } from "@/components/primitives/types"
import { resolveClassName } from "@/components/primitives/use-render"
import { Icon } from "@/components/ui/icon"
import { TextClassContext } from "@/components/ui/text"
import {
  toggleStateClassName,
  toggleTextClassName,
  toggleVariants,
} from "@/components/ui/toggle"

type ToggleGroupContextValue = VariantProps<typeof toggleVariants> & {
  spacing: number
  orientation: Orientation
}

const ToggleGroupContext = React.createContext<ToggleGroupContextValue>({
  variant: "default",
  size: "default",
  spacing: 2,
  orientation: "horizontal",
})

const ItemPositionContext = React.createContext({ first: true, last: true })

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

const SEGMENTED_SELECTED_CLASS_NAME =
  "bg-surface-raised shadow dark:bg-label-quaternary"

function ToggleGroupIndicator() {
  return (
    <ToggleGroupIndicatorPrimitive
      className={cn("rounded-md", SEGMENTED_SELECTED_CLASS_NAME)}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function ToggleGroup({
  className,
  style,
  variant = "default",
  size = "default",
  spacing = 2,
  orientation = "horizontal",
  multiple,
  children,
  ...props
}: React.ComponentProps<typeof ToggleGroupPrimitive> &
  VariantProps<typeof toggleVariants> & {
    spacing?: number
  }) {
  const segmented = spacing === 0 && variant === "default"
  const items = React.Children.toArray(children)
  const context = React.useMemo(
    () => ({ variant, size, spacing, orientation }),
    [variant, size, spacing, orientation]
  )
  return (
    <ToggleGroupPrimitive
      orientation={orientation}
      multiple={multiple}
      className={(state) =>
        cn(
          "relative flex-row items-center self-start",
          orientation === "vertical" && "flex-col items-stretch",
          spacing === 0 && variant === "outline" && "rounded-lg",
          segmented && "rounded-xl bg-control p-1",
          resolveClassName(className, state)
        )
      }
      style={(state) => [
        { gap: segmented ? 4 : spacing * 4 },
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    >
      {segmented && !multiple ? <ToggleGroupIndicator /> : null}
      <ToggleGroupContext.Provider value={context}>
        {items.map((child, index) => (
          <ItemPositionContext.Provider
            key={React.isValidElement(child) ? child.key : index}
            value={{ first: index === 0, last: index === items.length - 1 }}
          >
            {child}
          </ItemPositionContext.Provider>
        ))}
      </ToggleGroupContext.Provider>
    </ToggleGroupPrimitive>
  )
}

function itemClassName(
  context: ToggleGroupContextValue,
  position: { first: boolean; last: boolean },
  state: ToggleState,
  multiple: boolean
) {
  const vertical = context.orientation === "vertical"
  if (context.spacing === 0 && context.variant === "default") {
    return cn(
      "rounded-md px-3",
      state.pressed &&
        (state.disabled
          ? "bg-control-disabled"
          : multiple && SEGMENTED_SELECTED_CLASS_NAME)
    )
  }
  return cn(
    toggleStateClassName(state),
    context.spacing === 0 &&
      cn(
        "rounded-none",
        vertical
          ? cn(
              position.first && "rounded-t-xl",
              position.last && "rounded-b-xl"
            )
          : cn(
              position.first && "rounded-l-lg",
              position.last && "rounded-r-lg"
            ),
        context.variant === "outline" &&
          !position.first &&
          (vertical ? "border-t-0" : "border-l-0")
      )
  )
}

function itemTextClassName(
  context: ToggleGroupContextValue,
  state: ToggleState
) {
  if (context.spacing === 0 && context.variant === "default") {
    return cn(
      "text-sm",
      state.disabled
        ? "text-label-quaternary"
        : state.pressed
          ? "text-label"
          : "text-label-secondary"
    )
  }
  return toggleTextClassName(state)
}

function ToggleGroupItem({
  className,
  children,
  variant,
  size,
  ...props
}: React.ComponentProps<typeof TogglePrimitive> &
  VariantProps<typeof toggleVariants>) {
  const context = React.useContext(ToggleGroupContext)
  const position = React.useContext(ItemPositionContext)
  const multiple = useToggleGroupContext()?.multiple ?? false
  const resolved = {
    ...context,
    variant: context.variant || variant,
    size: context.size || size,
  }

  return (
    <TogglePrimitive
      className={(state) =>
        cn(
          "shrink-0",
          toggleVariants({ variant: resolved.variant, size: resolved.size }),
          itemClassName(resolved, position, state, multiple),
          resolveClassName(className, state)
        )
      }
      render={(renderProps, state) => (
        <TextClassContext.Provider value={itemTextClassName(resolved, state)}>
          <Pressable {...renderProps} />
        </TextClassContext.Provider>
      )}
      {...props}
    >
      {children}
    </TogglePrimitive>
  )
}

function ToggleGroupIcon({
  className,
  ...props
}: React.ComponentProps<typeof Icon>) {
  return <Icon className={cn("size-4 shrink-0", className)} {...props} />
}

export { ToggleGroup, ToggleGroupIcon, ToggleGroupItem }
```

4. Update the import paths to match your project.

**StyleSheet**

1. Install the dependencies:

```bash title="Terminal"
npx expo install react-native-reanimated react-native-worklets
```

2. Add the pieces it builds on: [Icon](/docs/components/icon), [Text](/docs/components/text), [Toggle](/docs/components/toggle), and the primitives `components/primitives/toggle.tsx`, `components/primitives/toggle-group.tsx`, `components/primitives/types.tsx`, `components/primitives/use-render.tsx`.

3. Copy the source into `components/ui/toggle-group.tsx`:

```tsx title="stylesheet/components/ui/toggle-group.tsx"
import * as React from "react"
import {
  Pressable,
  type StyleProp,
  StyleSheet,
  type TextStyle,
  type ViewStyle,
} from "react-native"
import Animated, {
  Easing,
  LinearTransition,
  ReduceMotion,
} from "react-native-reanimated"
import {
  Toggle as TogglePrimitive,
  type ToggleState,
} from "@/components/primitives/toggle"
import {
  ToggleGroupIndicator as ToggleGroupIndicatorPrimitive,
  ToggleGroup as ToggleGroupPrimitive,
  useToggleGroupContext,
} from "@/components/primitives/toggle-group"
import type { Orientation } from "@/components/primitives/types"
import { resolveStyle } from "@/components/primitives/use-render"
import { Icon } from "@/components/ui/icon"
import { TextStyleContext } from "@/components/ui/text"
import {
  fontSize,
  radius,
  shadow,
  type ThemeColors,
  useTheme,
} from "@/components/ui/theme"
import {
  type ToggleVariantProps,
  toggleStyle,
  toggleTextStyle,
} from "@/components/ui/toggle"

type ToggleGroupContextValue = ToggleVariantProps & {
  spacing: number
  orientation: Orientation
}

const ToggleGroupContext = React.createContext<ToggleGroupContextValue>({
  variant: "default",
  size: "default",
  spacing: 2,
  orientation: "horizontal",
})

const ItemPositionContext = React.createContext({ first: true, last: true })

const INDICATOR_TRANSITION = LinearTransition.duration(300)
  .easing(Easing.bezier(0.32, 0.72, 0, 1))
  .reduceMotion(ReduceMotion.System)

const styles = StyleSheet.create({
  root: {
    position: "relative",
    flexDirection: "row",
    alignItems: "center",
    alignSelf: "flex-start",
  },
  vertical: { flexDirection: "column", alignItems: "stretch" },
  attached: { borderRadius: radius.lg },
  item: { flexShrink: 0 },
  segmentedItem: { borderRadius: radius.md, paddingHorizontal: 12 },
  indicator: { borderRadius: radius.md },
  icon: { flexShrink: 0 },
})

function segmentedSelectedStyle(
  colors: ThemeColors,
  isDark: boolean
): StyleProp<ViewStyle> {
  return [
    { backgroundColor: isDark ? colors.labelQuaternary : colors.surfaceRaised },
    shadow.sm,
  ]
}

function ToggleGroupIndicator() {
  const { colors, isDark } = useTheme()
  return (
    <ToggleGroupIndicatorPrimitive
      style={[styles.indicator, segmentedSelectedStyle(colors, isDark)]}
      render={<Animated.View layout={INDICATOR_TRANSITION} />}
    />
  )
}

function ToggleGroup({
  style,
  variant = "default",
  size = "default",
  spacing = 2,
  orientation = "horizontal",
  multiple,
  children,
  ...props
}: React.ComponentProps<typeof ToggleGroupPrimitive> &
  ToggleVariantProps & {
    spacing?: number
  }) {
  const { colors } = useTheme()
  const segmented = spacing === 0 && variant === "default"
  const items = React.Children.toArray(children)
  const context = React.useMemo(
    () => ({ variant, size, spacing, orientation }),
    [variant, size, spacing, orientation]
  )
  return (
    <ToggleGroupPrimitive
      orientation={orientation}
      multiple={multiple}
      style={(state) => [
        styles.root,
        orientation === "vertical" && styles.vertical,
        { gap: segmented ? 4 : spacing * 4 },
        spacing === 0 && variant === "outline" && styles.attached,
        segmented && {
          borderRadius: radius.xl,
          backgroundColor: colors.control,
          padding: 4,
        },
        typeof style === "function" ? style(state) : style,
      ]}
      {...props}
    >
      {segmented && !multiple ? <ToggleGroupIndicator /> : null}
      <ToggleGroupContext.Provider value={context}>
        {items.map((child, index) => (
          <ItemPositionContext.Provider
            key={React.isValidElement(child) ? child.key : index}
            value={{ first: index === 0, last: index === items.length - 1 }}
          >
            {child}
          </ItemPositionContext.Provider>
        ))}
      </ToggleGroupContext.Provider>
    </ToggleGroupPrimitive>
  )
}

function attachedStyle(
  context: ToggleGroupContextValue,
  position: { first: boolean; last: boolean }
): ViewStyle {
  const vertical = context.orientation === "vertical"
  const edge = vertical ? radius.xl : radius.lg
  const result: ViewStyle = { borderRadius: 0 }
  if (vertical) {
    if (position.first) {
      result.borderTopLeftRadius = edge
      result.borderTopRightRadius = edge
    }
    if (position.last) {
      result.borderBottomLeftRadius = edge
      result.borderBottomRightRadius = edge
    }
  } else {
    if (position.first) {
      result.borderTopLeftRadius = edge
      result.borderBottomLeftRadius = edge
    }
    if (position.last) {
      result.borderTopRightRadius = edge
      result.borderBottomRightRadius = edge
    }
  }
  if (context.variant === "outline" && !position.first) {
    if (vertical) result.borderTopWidth = 0
    else result.borderLeftWidth = 0
  }
  return result
}

function itemStyle(
  context: ToggleGroupContextValue,
  position: { first: boolean; last: boolean },
  colors: ThemeColors,
  isDark: boolean,
  state: ToggleState,
  pressing: boolean,
  multiple: boolean
): StyleProp<ViewStyle> {
  if (context.spacing === 0 && context.variant === "default") {
    return [
      toggleStyle(context, colors, { ...state, pressed: false }, false),
      styles.segmentedItem,
      state.pressed &&
        (state.disabled
          ? { backgroundColor: colors.controlDisabled }
          : multiple && segmentedSelectedStyle(colors, isDark)),
    ]
  }
  return [
    toggleStyle(context, colors, state, pressing),
    context.spacing === 0 && attachedStyle(context, position),
  ]
}

function itemTextStyle(
  context: ToggleGroupContextValue,
  colors: ThemeColors,
  state: ToggleState
): TextStyle {
  if (context.spacing === 0 && context.variant === "default") {
    return {
      ...fontSize.sm,
      color: state.disabled
        ? colors.labelQuaternary
        : state.pressed
          ? colors.label
          : colors.labelSecondary,
    }
  }
  return toggleTextStyle(colors, state)
}

function ToggleGroupItem({
  style,
  children,
  variant,
  size,
  ...props
}: React.ComponentProps<typeof TogglePrimitive> & ToggleVariantProps) {
  const context = React.useContext(ToggleGroupContext)
  const position = React.useContext(ItemPositionContext)
  const { colors, isDark } = useTheme()
  const multiple = useToggleGroupContext()?.multiple ?? false
  const resolved = {
    ...context,
    variant: context.variant || variant,
    size: context.size || size,
  }

  return (
    <TogglePrimitive
      {...props}
      render={(renderProps, state) => (
        <TextStyleContext.Provider
          value={itemTextStyle(resolved, colors, state)}
        >
          <Pressable
            {...renderProps}
            style={({ pressed }) => [
              itemStyle(
                resolved,
                position,
                colors,
                isDark,
                state,
                pressed,
                multiple
              ),
              styles.item,
              resolveStyle(style, state) as StyleProp<ViewStyle>,
            ]}
          />
        </TextStyleContext.Provider>
      )}
    >
      {children}
    </TogglePrimitive>
  )
}

function ToggleGroupIcon({
  style,
  size = 16,
  ...props
}: React.ComponentProps<typeof Icon>) {
  return <Icon size={size} style={[styles.icon, style]} {...props} />
}

export { ToggleGroup, ToggleGroupIcon, ToggleGroupItem }
```

4. 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 title="swift/Theme/Theme.swift"
import SwiftUI
import UIKit

struct RGBA: Sendable {
  let red: CGFloat
  let green: CGFloat
  let blue: CGFloat
  let alpha: CGFloat

  init(_ hex: UInt32, _ alpha: CGFloat = 1) {
    red = CGFloat((hex >> 16) & 0xFF) / 255
    green = CGFloat((hex >> 8) & 0xFF) / 255
    blue = CGFloat(hex & 0xFF) / 255
    self.alpha = alpha
  }

  var uiColor: UIColor {
    UIColor(red: red, green: green, blue: blue, alpha: alpha)
  }
}

extension Color {
  static func adaptive(light: RGBA, dark: RGBA) -> Color {
    let lightColor = light.uiColor
    let darkColor = dark.uiColor
    return Color(uiColor: UIColor { traits in
      traits.userInterfaceStyle == .dark ? darkColor : lightColor
    })
  }
}

public struct TextStyle: Sendable, Hashable {
  public let size: CGFloat
  public let lineHeight: CGFloat
  public let letterSpacing: CGFloat

  public init(size: CGFloat, lineHeight: CGFloat, letterSpacing: CGFloat) {
    self.size = size
    self.lineHeight = lineHeight
    self.letterSpacing = letterSpacing
  }

  public func font(weight: Font.Weight = .regular) -> Font {
    .system(size: size, weight: weight)
  }

  public var lineSpacing: CGFloat {
    max(0, lineHeight - UIFont.systemFont(ofSize: size).lineHeight)
  }
}

extension Hashable where Self == Font {
  public static func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> Font {
    style.font(weight: weight)
  }
}

private struct TextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  func body(content: Content) -> some View {
    content
      .font(style.font(weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(style.lineSpacing)
      .padding(.vertical, style.lineSpacing / 2)
  }
}

extension View {
  public func textStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(TextStyleModifier(style: style, weight: weight))
  }
}

public struct Shadow: Sendable, Hashable {
  public let color: Color
  public let radius: CGFloat
  public let x: CGFloat
  public let y: CGFloat

  public init(color: Color, radius: CGFloat, x: CGFloat = 0, y: CGFloat = 0) {
    self.color = color
    self.radius = radius
    self.x = x
    self.y = y
  }
}

extension View {
  public func shadow(_ shadow: Shadow) -> some View {
    self.shadow(color: shadow.color, radius: shadow.radius, x: shadow.x, y: shadow.y)
  }
}
```

```swift title="swift/Theme/Tokens.swift"
import SwiftUI

extension Color {
  public static let surface = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let surfaceSecondary = Color.adaptive(light: .init(0xF5F5F7), dark: .init(0x161617))
  public static let surfaceTertiary = Color.adaptive(light: .init(0xE8E8ED), dark: .init(0x2C2C2E))
  public static let surfaceRaised = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x1D1D1F))
  public static let label = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let labelSecondary = Color.adaptive(light: .init(0x6E6E73), dark: .init(0xA1A1A6))
  public static let labelTertiary = Color.adaptive(light: .init(0x86868B), dark: .init(0x86868B))
  public static let labelQuaternary = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let control = Color.adaptive(light: .init(0x000000, 0.04), dark: .init(0xFFFFFF, 0.1))
  public static let controlPressed = Color.adaptive(light: .init(0x000000, 0.12), dark: .init(0xFFFFFF, 0.22))
  public static let controlSelected = Color.adaptive(light: .init(0x1D1D1F), dark: .init(0xF5F5F7))
  public static let controlDisabled = Color.adaptive(light: .init(0x000000, 0.03), dark: .init(0xFFFFFF, 0.05))
  public static let onControlSelected = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0x000000))
  public static let itemPressed = Color.adaptive(light: .init(0x000000, 0.08), dark: .init(0xFFFFFF, 0.12))
  public static let itemSelected = Color.adaptive(light: .init(0x000000, 0.06), dark: .init(0xFFFFFF, 0.1))
  public static let separator = Color.adaptive(light: .init(0xD2D2D7), dark: .init(0x424245))
  public static let separatorStrong = Color.adaptive(light: .init(0x86868B), dark: .init(0x6E6E73))
  public static let accent = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentPressed = Color.adaptive(light: .init(0x005BB8), dark: .init(0x004D9E))
  public static let accentSelected = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let accentDisabled = Color.adaptive(light: .init(0x0071E3, 0.4), dark: .init(0x0071E3, 0.4))
  public static let onAccent = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let accentSurface = Color.adaptive(light: .init(0x0071E3, 0.09), dark: .init(0x0071E3, 0.18))
  public static let accentSurfacePressed = Color.adaptive(light: .init(0x0071E3, 0.18), dark: .init(0x0071E3, 0.3))
  public static let link = Color.adaptive(light: .init(0x0066CC), dark: .init(0x2997FF))
  public static let focus = Color.adaptive(light: .init(0x0071E3), dark: .init(0x0071E3))
  public static let scrim = Color.adaptive(light: .init(0x000000, 0.48), dark: .init(0x000000, 0.48))
  public static let media = Color.adaptive(light: .init(0x000000), dark: .init(0x000000))
  public static let onMedia = Color.adaptive(light: .init(0xFFFFFF), dark: .init(0xFFFFFF))
  public static let danger = Color.adaptive(light: .init(0xD0000A), dark: .init(0xFF5447))
  public static let dangerSurface = Color.adaptive(light: .init(0xD70015, 0.08), dark: .init(0xFF453A, 0.2))
  public static let dangerSurfacePressed = Color.adaptive(light: .init(0xD70015, 0.16), dark: .init(0xFF453A, 0.36))
  public static let success = Color.adaptive(light: .init(0x008009), dark: .init(0x30D158))
  public static let successSurface = Color.adaptive(light: .init(0xEFFAF1), dark: .init(0x30D158, 0.16))
  public static let warning = Color.adaptive(light: .init(0xB64400), dark: .init(0xFF9F0A))
  public static let warningSurface = Color.adaptive(light: .init(0xFFF5EA), dark: .init(0xFF9F0A, 0.16))
}

public enum Radius {
  public static let xs: CGFloat = 3
  public static let sm: CGFloat = 5
  public static let md: CGFloat = 8
  public static let lg: CGFloat = 10
  public static let xl: CGFloat = 12
  public static let xl2: CGFloat = 18
  public static let xl3: CGFloat = 28
  public static let full: CGFloat = 9999
}

extension TextStyle {
  public static let xs3 = TextStyle(size: 11, lineHeight: 13, letterSpacing: 0.066)
  public static let xs2 = TextStyle(size: 12, lineHeight: 16, letterSpacing: 0)
  public static let xs = TextStyle(size: 13, lineHeight: 18, letterSpacing: -0.078)
  public static let sm = TextStyle(size: 15, lineHeight: 20, letterSpacing: -0.24)
  public static let md = TextStyle(size: 16, lineHeight: 21, letterSpacing: -0.32)
  public static let base = TextStyle(size: 17, lineHeight: 22, letterSpacing: -0.442)
  public static let lg = TextStyle(size: 20, lineHeight: 25, letterSpacing: -0.46)
  public static let xl = TextStyle(size: 22, lineHeight: 28, letterSpacing: -0.264)
  public static let xl2 = TextStyle(size: 28, lineHeight: 34, letterSpacing: 0.392)
  public static let xl3 = TextStyle(size: 34, lineHeight: 41, letterSpacing: 0.408)

  public static let allCases: [TextStyle] = [.xs3, .xs2, .xs, .sm, .md, .base, .lg, .xl, .xl2, .xl3]
}

extension Shadow {
  public static let md = Shadow(color: .black.opacity(0.08), radius: 6, x: 2, y: 4)
  public static let lg = Shadow(color: .black.opacity(0.12), radius: 12, y: 4)
}
```

4. Copy the source and every file it uses:

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

struct ToggleGroupContext {
  var variant: ToggleVariant
  var size: ToggleSize
  var spacing: Int
  var orientation: Axis
  var namespace: Namespace.ID
  var multiple: Bool
  var isSelected: (AnyHashable) -> Bool
  var toggle: (AnyHashable) -> Void

  var segmented: Bool { spacing == 0 && variant == .default }
  var attached: Bool { spacing == 0 && variant == .outline }
}

extension EnvironmentValues {
  @Entry var toggleGroup: ToggleGroupContext?
}

public struct ToggleGroup<Value: Hashable, Content: View>: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis
  let multiple: Bool
  let isSelected: (Value) -> Bool
  let toggle: (Value) -> Void
  let content: Content

  @Namespace private var namespace
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  public init(
    selection: Binding<Value?>,
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    multiple = false
    isSelected = { selection.wrappedValue == $0 }
    toggle = { value in
      selection.wrappedValue = selection.wrappedValue == value ? nil : value
    }
    self.content = content()
  }

  public init(
    selection: Binding<Set<Value>>,
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal,
    @ViewBuilder content: () -> Content
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    multiple = true
    isSelected = { selection.wrappedValue.contains($0) }
    toggle = { value in
      if selection.wrappedValue.contains(value) {
        selection.wrappedValue.remove(value)
      } else {
        selection.wrappedValue.insert(value)
      }
    }
    self.content = content()
  }

  public var body: some View {
    let context = ToggleGroupContext(
      variant: variant,
      size: size,
      spacing: spacing,
      orientation: orientation,
      namespace: namespace,
      multiple: multiple,
      isSelected: { value in (value.base as? Value).map(isSelected) ?? false },
      toggle: { value in
        guard let value = value.base as? Value else { return }
        if reduceMotion {
          toggle(value)
        } else {
          withAnimation(.timingCurve(0.32, 0.72, 0, 1, duration: 0.3)) { toggle(value) }
        }
      }
    )
    container
      .environment(\.toggleGroup, context)
      .accessibilityElement(children: .contain)
  }

  private var segmented: Bool { spacing == 0 && variant == .default }

  private var attached: Bool { spacing == 0 && variant == .outline }

  private var gap: CGFloat {
    segmented ? 4 : CGFloat(spacing) * 4
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: gap) { content }
    case .vertical:
      VStack(alignment: .leading, spacing: gap) { content }
    }
  }

  @ViewBuilder private var container: some View {
    if segmented {
      let shape = RoundedRectangle(cornerRadius: Radius.xl, style: .continuous)
      stack
        .padding(4)
        .background(Color.control, in: shape)
    } else if attached {
      let shape = RoundedRectangle(cornerRadius: orientation == .vertical ? Radius.xl : Radius.lg, style: .continuous)
      stack
        .padding(1)
        .clipShape(shape)
        .overlay {
          shape.stroke(Color.separator, lineWidth: 1).padding(0.5)
        }
    } else {
      stack
    }
  }
}

public struct ToggleGroupItem<Value: Hashable, Label: View>: View {
  let value: Value
  let label: Label

  @Environment(\.toggleGroup) private var group
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.colorScheme) private var colorScheme

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

  public var body: some View {
    let isOn = group?.isSelected(AnyHashable(value)) ?? false
    HapticButton(style: PressReader { pressed in
      item(isOn: isOn, pressed: pressed)
    }) {
      guard let group else { return false }
      group.toggle(AnyHashable(value))
      return true
    }
    .accessibilityAddTraits(isOn ? .isSelected : [])
  }

  @ViewBuilder private func item(isOn: Bool, pressed: Bool) -> some View {
    let variant = group?.variant ?? .default
    let size = group?.size ?? .default
    if let group, group.segmented {
      let shape = RoundedRectangle(cornerRadius: Radius.md, style: .continuous)
      label
        .labelStyle(ButtonLabelStyle(spacing: 4, iconSize: 16))
        .scaledFont(.sm)
        .lineLimit(1)
        .foregroundStyle(!isEnabled ? Color.labelQuaternary : isOn ? .label : .labelSecondary)
        .padding(.horizontal, 12)
        .frame(minWidth: size.height, minHeight: size.height)
        .frame(maxWidth: group.orientation == .vertical ? .infinity : nil)
        .background {
          if isOn {
            if isEnabled {
              shape
                .fill(colorScheme == .dark ? Color.labelQuaternary : .surfaceRaised)
                .shadow(.thumb)
                .matchedGeometryEffect(id: group.multiple ? AnyHashable(value) : AnyHashable("indicator"), in: group.namespace)
            } else {
              shape.fill(Color.controlDisabled)
            }
          }
        }
        .contentShape(shape)
    } else if let group, group.attached {
      ToggleSurface(
        isOn: isOn,
        pressed: pressed,
        variant: variant,
        size: size,
        shape: AnyShape(Rectangle()),
        bordered: false
      ) {
        label
      }
      .frame(maxWidth: group.orientation == .vertical ? .infinity : nil)
      .overlay(alignment: group.orientation == .vertical ? .top : .leading) {
        if group.orientation == .vertical {
          Color.separator.frame(height: 1).offset(y: -1)
        } else {
          Color.separator.frame(width: 1).offset(x: -1)
        }
      }
    } else {
      ToggleSurface(isOn: isOn, pressed: pressed, variant: variant, size: size) {
        label
      }
      .frame(maxWidth: group?.orientation == .vertical ? .infinity : nil)
    }
  }
}

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

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

public struct VariantButtonStyle: ButtonStyle {
  public enum Variant: CaseIterable, Sendable {
    case `default`, outline, secondary, tinted, ghost, plain, destructive, link
  }

  public enum Size: CaseIterable, Sendable {
    case `default`, xs, sm, lg, xl, icon, iconXs, iconSm, iconLg, iconXl

    var height: CGFloat {
      switch self {
      case .xs, .iconXs: 24
      case .sm, .iconSm: 32
      case .default, .icon: 36
      case .lg, .iconLg: 44
      case .xl, .iconXl: 56
      }
    }

    var horizontalPadding: CGFloat {
      switch self {
      case .xs: 11
      case .sm: 12
      case .default: 16
      case .lg: 22
      case .xl: 31
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: 0
      }
    }

    var spacing: CGFloat {
      switch self {
      case .xs, .sm, .iconXs, .iconSm: 4
      case .xl, .iconXl: 8
      default: 6
      }
    }

    var textStyle: TextStyle {
      switch self {
      case .xs, .iconXs: .xs2
      case .lg, .xl: .base
      default: .sm
      }
    }

    public var iconSize: CGFloat {
      switch self {
      case .xs, .iconXs: 12
      default: 16
      }
    }

    var blockRadius: CGFloat {
      switch self {
      case .xs, .iconXs: Radius.sm
      case .lg, .iconLg: Radius.lg
      case .xl, .iconXl: Radius.xl
      default: Radius.md
      }
    }

    var isIcon: Bool {
      switch self {
      case .icon, .iconXs, .iconSm, .iconLg, .iconXl: true
      default: false
      }
    }
  }

  let variant: Variant
  let size: Size
  let block: Bool
  var metrics: ButtonMetrics?

  public init(_ variant: Variant = .default, size: Size = .default, block: Bool = false) {
    self.variant = variant
    self.size = size
    self.block = block
  }

  init(_ variant: Variant, size: Size, metrics: ButtonMetrics) {
    self.variant = variant
    self.size = size
    self.block = false
    self.metrics = metrics
  }

  public func makeBody(configuration: Configuration) -> some View {
    StyledButton(configuration: configuration, variant: variant, size: size, block: block, metrics: metrics)
  }
}

struct ButtonMetrics: Sendable {
  var horizontalPadding: CGFloat
  var spacing: CGFloat
  var iconSize: CGFloat
  var textStyle: TextStyle
}

private struct StyledButton: View {
  let configuration: ButtonStyleConfiguration
  let variant: VariantButtonStyle.Variant
  let size: VariantButtonStyle.Size
  let block: Bool
  let metrics: ButtonMetrics?

  @Environment(\.colorScheme) private var colorScheme
  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.buttonGroup) private var group

  var body: some View {
    let joined = group != nil && variant != .ghost && variant != .plain
    let rounded = RoundedRectangle(
      cornerRadius: block ? size.blockRadius : Radius.full,
      style: .continuous
    )
    let shape = joined ? AnyShape(Rectangle()) : AnyShape(rounded)
    configuration.label
      .labelStyle(ButtonLabelStyle(spacing: metrics?.spacing ?? size.spacing, iconSize: metrics?.iconSize ?? size.iconSize))
    .font((metrics?.textStyle ?? size.textStyle).font())
    .tracking((metrics?.textStyle ?? size.textStyle).letterSpacing)
    .underline(variant == .link && pressed && isEnabled)
    .lineLimit(1)
    .foregroundStyle(foreground)
    .padding(.horizontal, metrics?.horizontalPadding ?? size.horizontalPadding)
    .frame(width: size.isIcon && !block ? size.height : nil, height: size.height)
    .frame(maxWidth: block || group == .vertical ? .infinity : nil)
    .background(background, in: shape)
    .overlay {
      if variant == .outline && !joined {
        rounded.strokeBorder(Color.separator)
      }
    }
    .contentShape(shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      joined ? [ButtonGroupFrame(bounds: anchor, outlined: variant == .outline)] : []
    }
  }

  private var isDark: Bool { colorScheme == .dark }
  private var pressed: Bool { configuration.isPressed }

  private var foreground: Color {
    switch variant {
    case .default:
      .onAccent
    case .outline, .secondary, .ghost:
      isEnabled ? .label : .labelQuaternary
    case .tinted, .plain:
      isEnabled ? .link : .link.opacity(0.4)
    case .destructive:
      isEnabled ? .danger : .danger.opacity(0.4)
    case .link:
      isEnabled ? .link : .labelQuaternary
    }
  }

  private var background: Color {
    switch variant {
    case .default:
      !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    case .outline:
      isEnabled && pressed ? .itemPressed : isDark ? .clear : .surface
    case .secondary:
      !isEnabled ? .controlDisabled : pressed ? .controlPressed : .control
    case .tinted:
      isEnabled && pressed ? .accentSurfacePressed : .accentSurface
    case .ghost:
      isEnabled && pressed ? .itemPressed : .clear
    case .plain:
      isEnabled && pressed ? .itemPressed : .clear
    case .destructive:
      isEnabled && pressed ? .dangerSurfacePressed : .dangerSurface
    case .link:
      .clear
    }
  }
}

struct ButtonLabelStyle: LabelStyle {
  let spacing: CGFloat
  let iconSize: CGFloat

  func makeBody(configuration: Configuration) -> some View {
    HStack(spacing: spacing) {
      configuration.icon
        .frame(width: iconSize, height: iconSize)
      configuration.title
    }
  }
}

extension ButtonStyle where Self == VariantButtonStyle {
  public static func variant(
    _ variant: VariantButtonStyle.Variant = .default,
    size: VariantButtonStyle.Size = .default,
    block: Bool = false
  ) -> VariantButtonStyle {
    VariantButtonStyle(variant, size: size, block: block)
  }
}
```

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

extension EnvironmentValues {
  @Entry var buttonGroup: Axis? = nil
  @Entry var buttonGroupSize: CGSize = .zero
}

enum ButtonGroupSpace: Hashable {
  case group
}

struct ButtonGroupFrame {
  let bounds: Anchor<CGRect>
  let outlined: Bool
}

struct ButtonGroupFramesKey: PreferenceKey {
  static var defaultValue: [ButtonGroupFrame] { [] }

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

struct ButtonGroupNestedKey: PreferenceKey {
  static var defaultValue: Bool { false }

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct ButtonGroup<Content: View>: View {
  let orientation: Axis
  let content: Content

  @State private var nested = false
  @State private var size: CGSize = .zero

  public init(orientation: Axis = .horizontal, @ViewBuilder content: () -> Content) {
    self.orientation = orientation
    self.content = content()
  }

  public var body: some View {
    let shape = orientation == .horizontal
      ? AnyShape(Capsule())
      : AnyShape(RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous))
    stack
      .coordinateSpace(.named(ButtonGroupSpace.group))
      .onGeometryChange(for: CGSize.self) { $0.size } action: { size = $0 }
      .environment(\.buttonGroup, nested ? nil : orientation)
      .environment(\.buttonGroupSize, size)
      .onPreferenceChange(ButtonGroupNestedKey.self) { nested = $0 }
      .modifier(ButtonGroupClip(shape: nested ? nil : shape))
      .overlayPreferenceValue(ButtonGroupFramesKey.self) { frames in
        if !nested {
          GeometryReader { proxy in
            outline(frames.map { (proxy[$0.bounds], $0.outlined) }, shape: shape)
          }
        }
      }
      .transformPreference(ButtonGroupFramesKey.self) { $0 = [] }
      .transformPreference(ButtonGroupNestedKey.self) { $0 = true }
      .fixedSize(horizontal: orientation == .vertical, vertical: orientation == .horizontal)
      .accessibilityElement(children: .contain)
  }

  @ViewBuilder private var stack: some View {
    switch orientation {
    case .horizontal:
      HStack(spacing: nested ? 8 : 0) { content }
    case .vertical:
      VStack(spacing: nested ? 8 : 0) { content }
    }
  }

  @ViewBuilder private func outline(_ frames: [(CGRect, Bool)], shape: AnyShape) -> some View {
    if frames.contains(where: \.1) {
      ZStack(alignment: .topLeading) {
        shape
          .stroke(Color.separator, lineWidth: 1)
          .padding(0.5)
          .mask {
            Path { path in
              for (rect, outlined) in frames where outlined {
                path.addRect(rect)
              }
            }
          }
        ForEach(Array(frames.dropLast().enumerated()), id: \.offset) { _, frame in
          if frame.1 {
            divider(frame.0)
          }
        }
      }
      .clipShape(shape)
      .allowsHitTesting(false)
    }
  }

  private func divider(_ rect: CGRect) -> some View {
    let horizontal = orientation == .horizontal
    return Rectangle()
      .fill(Color.separator)
      .frame(width: horizontal ? 1 : rect.width, height: horizontal ? rect.height : 1)
      .position(
        x: horizontal ? rect.maxX - 0.5 : rect.midX,
        y: horizontal ? rect.midY : rect.maxY - 0.5
      )
  }
}

struct ButtonGroupItem<Content: View>: View {
  let radius: CGFloat
  let content: (UnevenRoundedRectangle) -> Content

  @State private var frame: CGRect = .zero
  @Environment(\.buttonGroup) private var group
  @Environment(\.buttonGroupSize) private var groupSize

  init(radius: CGFloat, @ViewBuilder content: @escaping (UnevenRoundedRectangle) -> Content) {
    self.radius = radius
    self.content = content
  }

  var body: some View {
    if let group {
      content(shape(group))
        .onGeometryChange(for: CGRect.self) { $0.frame(in: .named(ButtonGroupSpace.group)) } action: { frame = $0 }
    } else {
      content(UnevenRoundedRectangle(cornerRadii: RectangleCornerRadii(
        topLeading: radius,
        bottomLeading: radius,
        bottomTrailing: radius,
        topTrailing: radius
      ), style: .continuous))
    }
  }

  private func shape(_ group: Axis) -> UnevenRoundedRectangle {
    let horizontal = group == .horizontal
    let first = horizontal ? frame.minX <= 0.5 : frame.minY <= 0.5
    let last = horizontal
      ? frame.maxX >= groupSize.width - 0.5
      : frame.maxY >= groupSize.height - 0.5
    let round = horizontal ? frame.height / 2 : Radius.xl2
    let start: CGFloat = first ? round : 0
    let end: CGFloat = last ? round : 0
    let radii = horizontal
      ? RectangleCornerRadii(topLeading: start, bottomLeading: start, bottomTrailing: end, topTrailing: end)
      : RectangleCornerRadii(topLeading: start, bottomLeading: end, bottomTrailing: end, topTrailing: start)
    return UnevenRoundedRectangle(cornerRadii: radii, style: .continuous)
  }
}

private struct ButtonGroupClip: ViewModifier {
  let shape: AnyShape?

  func body(content: Content) -> some View {
    if let shape {
      content.clipShape(shape)
    } else {
      content
    }
  }
}

public struct ButtonGroupText<Content: View>: View {
  let content: Content

  @Environment(\.buttonGroup) private var group

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

  public var body: some View {
    let shape = group == nil ? AnyShape(Capsule()) : AnyShape(Rectangle())
    HStack(spacing: 8) {
      content
    }
    .labelStyle(ButtonLabelStyle(spacing: 8, iconSize: 16))
    .scaledFont(.sm)
    .lineLimit(1)
    .foregroundStyle(Color.label)
    .padding(.horizontal, 10)
    .frame(minHeight: 36)
    .frame(maxWidth: group == .vertical ? .infinity : nil, maxHeight: group == .horizontal ? .infinity : nil)
    .background(Color.control, in: shape)
    .anchorPreference(key: ButtonGroupFramesKey.self, value: .bounds) { anchor in
      group == nil ? [] : [ButtonGroupFrame(bounds: anchor, outlined: false)]
    }
  }
}

extension ButtonGroupText where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }

  public init(verbatim title: String) {
    self.init { Text(verbatim: title) }
  }
}

public struct ButtonGroupSeparator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .vertical) {
    self.orientation = orientation
  }

  public var body: some View {
    let vertical = orientation == .vertical
    Rectangle()
      .fill(Color.label.opacity(0.2))
      .frame(width: vertical ? 1 : nil, height: vertical ? nil : 1)
      .padding(vertical ? .vertical : .horizontal, 9)
      .frame(maxWidth: vertical ? nil : .infinity, maxHeight: vertical ? .infinity : nil)
      .padding(vertical ? .trailing : .bottom, -1)
      .zIndex(1)
      .accessibilityHidden(true)
  }
}
```

```swift title="swift/Components/Checkbox.swift"
import PhosphorSwift
import SwiftUI

extension Shadow {
  static let control = Shadow(color: .black.opacity(0.08), radius: 0.5, y: 0.5)
  static let thumb = Shadow(color: .black.opacity(0.12), radius: 1.5, y: 1)
}

struct SelectionIndicator<Mark: View>: View {
  let checked: Bool
  let pressed: Bool
  let cornerRadius: CGFloat
  let mark: Mark

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.isInvalid) private var invalid
  @Environment(\.colorScheme) private var colorScheme

  init(checked: Bool, pressed: Bool, cornerRadius: CGFloat, @ViewBuilder mark: () -> Mark) {
    self.checked = checked
    self.pressed = pressed
    self.cornerRadius = cornerRadius
    self.mark = mark()
  }

  var body: some View {
    let shape = RoundedRectangle(cornerRadius: cornerRadius, style: .continuous)
    ZStack {
      shape.fill(fill)
      shape.strokeBorder(border, lineWidth: 1)
      if checked {
        mark
      }
    }
    .frame(width: 16, height: 16)
    .shadow(raised ? .control : Shadow(color: .clear, radius: 0))
  }

  private var isDark: Bool { colorScheme == .dark }

  private var raised: Bool { !checked && isEnabled && !isDark }

  private var fill: Color {
    if checked {
      return !isEnabled ? .accentDisabled : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return .controlDisabled }
    if isDark { return pressed ? .labelTertiary.opacity(0.6) : .labelQuaternary }
    return pressed ? .control : .surface
  }

  private var border: Color {
    if checked {
      return !isEnabled ? .clear : pressed ? .accentPressed : .accent
    }
    if !isEnabled { return isDark ? .clear : .label.opacity(0.1) }
    if invalid { return .danger }
    return isDark ? .clear : .label.opacity(0.25)
  }
}

struct PressReader<Content: View>: ButtonStyle {
  let content: (Bool) -> Content

  init(@ViewBuilder content: @escaping (Bool) -> Content) {
    self.content = content
  }

  func makeBody(configuration: Configuration) -> some View {
    content(configuration.isPressed)
  }
}

public struct CheckboxStyle: ToggleStyle {
  public init() {}

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      HStack(spacing: 12) {
        SelectionIndicator(
          checked: configuration.isOn || configuration.isMixed,
          pressed: pressed,
          cornerRadius: 4
        ) {
          (configuration.isMixed ? Ph.minus.regular : Ph.check.regular)
            .frame(width: 14, height: 14)
            .foregroundStyle(Color.onAccent)
        }
        configuration.label
      }
      .contentShape(Rectangle().inset(by: -8))
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityElement(children: .combine)
    .accessibilityRemoveTraits(.isButton)
    .accessibilityAddTraits(.isToggle)
    .accessibilityValue(
      configuration.isMixed
        ? Text("Mixed")
        : configuration.isOn ? Text("Checked") : Text("Unchecked")
    )
  }
}

extension ToggleStyle where Self == CheckboxStyle {
  public static var checkbox: CheckboxStyle { CheckboxStyle() }
}
```

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

extension EnvironmentValues {
  @Entry public var isInvalid = false
  @Entry var fieldInset = false
  @Entry var fieldGroupInset = false
  @Entry var fieldSetInset = false
}

extension View {
  public func invalid(_ isInvalid: Bool = true) -> some View {
    environment(\.isInvalid, isInvalid)
  }
}

public enum FieldOrientation: CaseIterable, Sendable {
  case vertical, horizontal
}

public struct Field<Content: View>: View {
  let orientation: FieldOrientation
  let invalid: Bool?
  let content: Content

  @Environment(\.fieldGroupInset) private var inset
  @Environment(\.isInvalid) private var inheritedInvalid

  public init(
    orientation: FieldOrientation = .vertical,
    invalid: Bool? = nil,
    @ViewBuilder content: () -> Content
  ) {
    self.orientation = orientation
    self.invalid = invalid
    self.content = content()
  }

  public var body: some View {
    Group {
      switch orientation {
      case .vertical:
        VStack(alignment: .leading, spacing: 12) { content }
      case .horizontal:
        HStack(alignment: .center, spacing: 12) { content }
      }
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .padding(.horizontal, inset ? 16 : 0)
    .padding(.vertical, inset ? 6 : 0)
    .frame(minHeight: inset ? 44 : nil)
    .overlay(alignment: .top) {
      if inset {
        Color.separator
          .frame(height: 1)
          .padding(.leading, 16)
          .offset(y: -1)
      }
    }
    .environment(\.fieldInset, inset)
    .environment(\.fieldGroupInset, false)
    .environment(\.isInvalid, invalid ?? inheritedInvalid)
  }
}

public struct FieldContent<Content: View>: View {
  let content: Content

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

  public var body: some View {
    VStack(alignment: .leading, spacing: 4) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
  }
}

public struct FieldTitle: View {
  let text: Text

  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey) {
    text = Text(title)
  }

  public init<S: StringProtocol>(_ title: S) {
    text = Text(title)
  }

  public var body: some View {
    text
      .scaledTextStyle(.base, weight: .semibold)
      .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
  }
}

public struct FieldDescription: View {
  let text: Text

  @Environment(\.fieldSetInset) private var inset

  public init(_ description: LocalizedStringKey) {
    text = Text(description)
  }

  public init<S: StringProtocol>(_ description: S) {
    text = Text(description)
  }

  public var body: some View {
    text
      .scaledTextStyle(inset ? .xs : .sm)
      .foregroundStyle(Color.labelSecondary)
      .multilineTextAlignment(.leading)
      .fixedSize(horizontal: false, vertical: true)
      .padding(.leading, inset ? 16 : 0)
  }
}

public struct FieldError: View {
  let messages: [String]
  let text: Text?

  public init(_ message: LocalizedStringKey) {
    messages = []
    text = Text(message)
  }

  public init(errors: [String?]) {
    var seen = Set<String>()
    messages = errors.compactMap { $0 }.filter { !$0.isEmpty && seen.insert($0).inserted }
    text = nil
  }

  public var body: some View {
    if let content {
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.danger)
        .multilineTextAlignment(.leading)
        .fixedSize(horizontal: false, vertical: true)
    }
  }

  private var content: Text? {
    if let text { return text }
    switch messages.count {
    case 0: return nil
    case 1: return Text(verbatim: messages[0])
    default: return Text(verbatim: messages.map { "\u{2022} \($0)" }.joined(separator: "\n"))
    }
  }
}

public enum FieldGroupVariant: CaseIterable, Sendable {
  case `default`, inset
}

public struct FieldGroup<Content: View>: View {
  let variant: FieldGroupVariant
  let content: Content

  public init(_ variant: FieldGroupVariant = .default, @ViewBuilder content: () -> Content) {
    self.variant = variant
    self.content = content()
  }

  public var body: some View {
    styled
      .environment(\.fieldGroupInset, variant == .inset)
      .environment(\.fieldSetInset, false)
      .transformPreference(FieldSetInsetKey.self) { $0 = variant == .inset }
  }

  @ViewBuilder private var styled: some View {
    let stack = VStack(alignment: .leading, spacing: variant == .inset ? 0 : 28) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    if variant == .inset {
      let shape = RoundedRectangle(cornerRadius: Radius.xl2, style: .continuous)
      stack
        .background(Color.surfaceSecondary, in: shape)
        .clipShape(shape)
    } else {
      stack
    }
  }
}

struct FieldSetInsetKey: PreferenceKey {
  static let defaultValue = false

  static func reduce(value: inout Bool, nextValue: () -> Bool) {
    value = value || nextValue()
  }
}

public struct FieldSet<Content: View>: View {
  let content: Content

  @State private var inset = false

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

  public var body: some View {
    VStack(alignment: .leading, spacing: inset ? 8 : 24) {
      content
    }
    .frame(maxWidth: .infinity, alignment: .leading)
    .environment(\.fieldSetInset, inset)
    .onPreferenceChange(FieldSetInsetKey.self) { inset = $0 }
    .transformPreference(FieldSetInsetKey.self) { $0 = false }
    .accessibilityElement(children: .contain)
  }
}

public struct FieldLegend: View {
  public enum Variant: CaseIterable, Sendable {
    case legend, label
  }

  let text: Text
  let variant: Variant

  @Environment(\.fieldSetInset) private var inset
  @Environment(\.isEnabled) private var isEnabled

  public init(_ title: LocalizedStringKey, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public init<S: StringProtocol>(_ title: S, variant: Variant = .legend) {
    text = Text(title)
    self.variant = variant
  }

  public var body: some View {
    Group {
      if inset {
        text
          .textCase(.uppercase)
          .scaledTextStyle(.xs)
          .foregroundStyle(isEnabled ? Color.labelSecondary : .labelQuaternary)
          .padding(.leading, 16)
      } else {
        text
          .scaledTextStyle(.base, weight: .semibold)
          .foregroundStyle(isEnabled ? Color.label : .labelQuaternary)
          .padding(.bottom, 12)
      }
    }
    .accessibilityAddTraits(variant == .legend ? .isHeader : [])
  }
}

public struct FieldSeparator<Content: View>: View {
  let content: Content

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

  public var body: some View {
    ZStack {
      Separator()
      content
        .scaledTextStyle(.sm)
        .foregroundStyle(Color.labelSecondary)
        .padding(.horizontal, 8)
        .background(Color.surface)
    }
    .frame(minHeight: 20)
    .padding(.vertical, -8)
  }
}

extension FieldSeparator where Content == EmptyView {
  public init() {
    self.init { EmptyView() }
  }
}

extension FieldSeparator where Content == Text {
  public init(_ title: LocalizedStringKey) {
    self.init { Text(title) }
  }
}
```

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

extension EnvironmentValues {
  @Entry public var hapticsEnabled = true
}

extension View {
  public func haptics(_ enabled: Bool) -> some View {
    environment(\.hapticsEnabled, enabled)
  }

  func hapticFeedback<Trigger: Equatable>(_ feedback: SensoryFeedback, trigger: Trigger) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger) { _, _ in true })
  }

  func hapticFeedback<Trigger: Equatable>(
    _ feedback: SensoryFeedback,
    trigger: Trigger,
    condition: @escaping (Trigger, Trigger) -> Bool
  ) -> some View {
    modifier(HapticFeedbackModifier(feedback: feedback, trigger: trigger, condition: condition))
  }
}

private struct HapticFeedbackModifier<Trigger: Equatable>: ViewModifier {
  let feedback: SensoryFeedback
  let trigger: Trigger
  let condition: (Trigger, Trigger) -> Bool

  @Environment(\.hapticsEnabled) private var enabled

  func body(content: Content) -> some View {
    let enabled = enabled
    let condition = condition
    content.sensoryFeedback(feedback, trigger: trigger) { old, new in
      enabled && condition(old, new)
    }
  }
}

enum HapticMoments {
  static func step(_ value: Double, bounds: ClosedRange<Double>, step: Double?) -> Int? {
    guard let step, step > 0 else { return nil }
    return Int(((value - bounds.lowerBound) / step).rounded())
  }

  static func lifted<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    new != nil && old != new
  }

  static func crossed<Value: Equatable>(_ old: Value?, _ new: Value?) -> Bool {
    old == nil && new != nil
  }

  static func moved(_ old: Int?, _ new: Int?) -> Bool {
    guard let old, let new else { return false }
    return old != new
  }
}

struct HapticButton<Style: ButtonStyle>: View {
  let feedback: SensoryFeedback
  let action: () -> Bool
  let style: Style

  @State private var count = 0

  init(_ feedback: SensoryFeedback = .selection, style: Style, action: @escaping () -> Bool) {
    self.feedback = feedback
    self.style = style
    self.action = action
  }

  var body: some View {
    Button {
      if action() { count += 1 }
    } label: {
      EmptyView()
    }
    .buttonStyle(style)
    .hapticFeedback(feedback, trigger: count)
  }
}
```

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

public struct Separator: View {
  let orientation: Axis

  public init(_ orientation: Axis = .horizontal) {
    self.orientation = orientation
  }

  public var body: some View {
    Rectangle()
      .fill(Color.separator)
      .frame(width: orientation == .vertical ? 1 : nil, height: orientation == .horizontal ? 1 : nil)
      .frame(maxWidth: orientation == .horizontal ? .infinity : nil, maxHeight: orientation == .vertical ? .infinity : nil)
      .accessibilityHidden(true)
  }
}
```

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

public enum TextVariant: CaseIterable, Sendable {
  case `default`, h1, h2, h3, h4, p, blockquote, code, lead, large, small, muted

  var style: TextStyle {
    switch self {
    case .h1: .xl3
    case .h2: .xl2
    case .h3: .xl
    case .h4, .lead, .large: .lg
    case .code, .small, .muted: .sm
    default: .base
    }
  }

  var weight: Font.Weight {
    switch self {
    case .h1, .h2: .bold
    case .h3, .h4, .large, .code: .semibold
    case .small: .medium
    default: .regular
    }
  }

  var color: Color {
    switch self {
    case .lead, .muted: .labelSecondary
    default: .label
    }
  }

  var isHeading: Bool {
    switch self {
    case .h1, .h2, .h3, .h4: true
    default: false
    }
  }
}

private struct TextVariantModifier: ViewModifier {
  let variant: TextVariant

  func body(content: Content) -> some View {
    switch variant {
    case .blockquote:
      styled(content)
        .italic()
        .padding(.leading, 12)
        .overlay(alignment: .leading) {
          Rectangle().fill(Color.separator).frame(width: 2)
        }
        .padding(.top, 16)
    case .code:
      styled(content)
        .monospaced()
        .padding(.horizontal, 4)
        .padding(.vertical, 2)
        .background(Color.surfaceSecondary, in: RoundedRectangle(cornerRadius: Radius.sm, style: .continuous))
    case .p:
      styled(content).padding(.top, 12)
    default:
      styled(content)
    }
  }

  private func styled(_ content: Content) -> some View {
    content
      .scaledTextStyle(variant.style, weight: variant.weight)
      .foregroundStyle(variant.color)
      .accessibilityAddTraits(variant.isHeading ? .isHeader : [])
  }
}

extension View {
  public func textVariant(_ variant: TextVariant) -> some View {
    modifier(TextVariantModifier(variant: variant))
  }
}

private struct ScaledTextStyleModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    let size = style.size * scale
    let lineSpacing = max(0, style.lineHeight * scale - UIFont.systemFont(ofSize: size).lineHeight)
    content
      .font(.system(size: size, weight: weight))
      .tracking(style.letterSpacing)
      .lineSpacing(lineSpacing)
      .padding(.vertical, lineSpacing / 2)
  }
}

extension View {
  func scaledTextStyle(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledTextStyleModifier(style: style, weight: weight))
  }

  func scaledFont(_ style: TextStyle, weight: Font.Weight = .regular) -> some View {
    modifier(ScaledFontModifier(style: style, weight: weight))
  }
}

private struct ScaledFontModifier: ViewModifier {
  let style: TextStyle
  let weight: Font.Weight

  @ScaledMetric(relativeTo: .body) private var scale: CGFloat = 1

  func body(content: Content) -> some View {
    content
      .font(.system(size: style.size * scale, weight: weight))
      .tracking(style.letterSpacing)
  }
}
```

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

public enum ToggleVariant: CaseIterable, Sendable {
  case `default`, outline
}

public enum ToggleSize: CaseIterable, Sendable {
  case `default`, sm, lg

  var height: CGFloat {
    switch self {
    case .default: 36
    case .sm: 32
    case .lg: 40
    }
  }

  var horizontalPadding: CGFloat {
    self == .lg ? 16 : 12
  }
}

public struct VariantToggleStyle: ToggleStyle {
  let variant: ToggleVariant
  let size: ToggleSize

  public init(_ variant: ToggleVariant = .default, size: ToggleSize = .default) {
    self.variant = variant
    self.size = size
  }

  public func makeBody(configuration: Configuration) -> some View {
    HapticButton(style: PressReader { pressed in
      ToggleSurface(isOn: configuration.isOn, pressed: pressed, variant: variant, size: size) {
        configuration.label
      }
    }) {
      configuration.isOn.toggle()
      return true
    }
    .accessibilityAddTraits(configuration.isOn ? .isSelected : [])
  }
}

extension ToggleStyle where Self == VariantToggleStyle {
  public static func variant(_ variant: ToggleVariant = .default, size: ToggleSize = .default) -> VariantToggleStyle {
    VariantToggleStyle(variant, size: size)
  }
}

struct ToggleSurface<Content: View>: View {
  let isOn: Bool
  let pressed: Bool
  let variant: ToggleVariant
  let size: ToggleSize
  var shape = AnyShape(RoundedRectangle(cornerRadius: Radius.lg, style: .continuous))
  var bordered = true
  let content: Content

  @Environment(\.isEnabled) private var isEnabled
  @Environment(\.accessibilityReduceMotion) private var reduceMotion

  init(
    isOn: Bool,
    pressed: Bool,
    variant: ToggleVariant,
    size: ToggleSize,
    shape: AnyShape? = nil,
    bordered: Bool = true,
    @ViewBuilder content: () -> Content
  ) {
    self.isOn = isOn
    self.pressed = pressed
    self.variant = variant
    self.size = size
    if let shape { self.shape = shape }
    self.bordered = bordered
    self.content = content()
  }

  var body: some View {
    content
      .labelStyle(ButtonLabelStyle(spacing: 4, iconSize: 16))
      .scaledFont(.sm)
      .lineLimit(1)
      .foregroundStyle(foreground)
      .padding(.horizontal, size.horizontalPadding)
      .frame(minWidth: size.height, minHeight: size.height)
      .background(background, in: shape)
      .overlay {
        if variant == .outline && bordered {
          shape.stroke(Color.separator, lineWidth: 1).padding(0.5)
        }
      }
      .contentShape(shape)
      .scaleEffect(pressed && isEnabled && !reduceMotion ? 0.96 : 1)
      .animation(reduceMotion ? nil : .easeOut(duration: 0.15), value: pressed)
  }

  private var foreground: Color {
    if !isEnabled { return .labelQuaternary }
    return isOn ? .link : .label
  }

  private var background: Color {
    if !isEnabled { return isOn ? .controlDisabled : .clear }
    if isOn { return pressed ? .itemPressed : .itemSelected }
    return pressed ? .itemPressed : .clear
  }
}
```

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")
implementation("com.adamglin:phosphor-icon-android:1.0.0")
```

2. Copy the theme files every view uses:

```kt title="kotlin/theme/Theme.kt"
package com.esuiss.ui.theme

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.Immutable
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.dropShadow
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.shadow.Shadow as DropShadow
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.style.LineHeightStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.em
import androidx.compose.ui.unit.sp

internal fun textStyle(size: Double, lineHeight: Double, letterSpacing: Double) = TextStyle(
    fontSize = size.sp,
    lineHeight = lineHeight.sp,
    letterSpacing = letterSpacing.em,
    lineHeightStyle = LineHeightStyle(
        alignment = LineHeightStyle.Alignment.Center,
        trim = LineHeightStyle.Trim.None,
    ),
)

@Immutable
data class Shadow(
    val offsetX: Dp,
    val offsetY: Dp,
    val blur: Dp,
    val color: Color,
)

fun Modifier.shadow(shadow: Shadow, shape: Shape): Modifier = dropShadow(
    shape,
    DropShadow(
        radius = shadow.blur,
        color = shadow.color,
        offset = DpOffset(shadow.offsetX, shadow.offsetY),
    ),
)

val LocalColors = staticCompositionLocalOf { LightColors }

object EsuissTheme {
    val colors: Colors
        @Composable get() = LocalColors.current

    val typography: Typography
        get() = Typography

    val radius: Radius
        get() = Radius

    val shadows: Shadows
        get() = Shadows
}

@Composable
fun EsuissTheme(
    darkTheme: Boolean = isSystemInDarkTheme(),
    content: @Composable () -> Unit,
) {
    CompositionLocalProvider(
        LocalColors provides if (darkTheme) DarkColors else LightColors,
        content = content,
    )
}
```

```kt title="kotlin/theme/Tokens.kt"
package com.esuiss.ui.theme

import androidx.compose.runtime.Immutable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp

@Immutable
data class Colors(
    val surface: Color,
    val surfaceSecondary: Color,
    val surfaceTertiary: Color,
    val surfaceRaised: Color,
    val label: Color,
    val labelSecondary: Color,
    val labelTertiary: Color,
    val labelQuaternary: Color,
    val control: Color,
    val controlPressed: Color,
    val controlSelected: Color,
    val controlDisabled: Color,
    val onControlSelected: Color,
    val itemPressed: Color,
    val itemSelected: Color,
    val separator: Color,
    val separatorStrong: Color,
    val accent: Color,
    val accentPressed: Color,
    val accentSelected: Color,
    val accentDisabled: Color,
    val onAccent: Color,
    val accentSurface: Color,
    val accentSurfacePressed: Color,
    val link: Color,
    val focus: Color,
    val scrim: Color,
    val media: Color,
    val onMedia: Color,
    val danger: Color,
    val dangerSurface: Color,
    val dangerSurfacePressed: Color,
    val success: Color,
    val successSurface: Color,
    val warning: Color,
    val warningSurface: Color,
    val blue: Color,
    val green: Color,
    val orange: Color,
    val red: Color,
    val yellow: Color,
    val purple: Color,
    val pink: Color,
    val indigo: Color,
    val teal: Color,
    val mint: Color,
    val cyan: Color,
    val brown: Color,
    val gray: Color,
    val isDark: Boolean,
)

val LightColors = Colors(
    surface = Color(0xFFFFFFFF),
    surfaceSecondary = Color(0xFFF5F5F7),
    surfaceTertiary = Color(0xFFE8E8ED),
    surfaceRaised = Color(0xFFFFFFFF),
    label = Color(0xFF1D1D1F),
    labelSecondary = Color(0xFF6E6E73),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFFD2D2D7),
    control = Color(0xFF000000).copy(alpha = 0.04f),
    controlPressed = Color(0xFF000000).copy(alpha = 0.12f),
    controlSelected = Color(0xFF1D1D1F),
    controlDisabled = Color(0xFF000000).copy(alpha = 0.03f),
    onControlSelected = Color(0xFFFFFFFF),
    itemPressed = Color(0xFF000000).copy(alpha = 0.08f),
    itemSelected = Color(0xFF000000).copy(alpha = 0.06f),
    separator = Color(0xFFD2D2D7),
    separatorStrong = Color(0xFF86868B),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF005BB8),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.09f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.18f),
    link = Color(0xFF0066CC),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFD0000A),
    dangerSurface = Color(0xFFD70015).copy(alpha = 0.08f),
    dangerSurfacePressed = Color(0xFFD70015).copy(alpha = 0.16f),
    success = Color(0xFF008009),
    successSurface = Color(0xFFEFFAF1),
    warning = Color(0xFFB64400),
    warningSurface = Color(0xFFFFF5EA),
    blue = Color(0xFF007AFF),
    green = Color(0xFF34C759),
    orange = Color(0xFFFF9500),
    red = Color(0xFFFF3B30),
    yellow = Color(0xFFFFCC00),
    purple = Color(0xFFAF52DE),
    pink = Color(0xFFFF2D55),
    indigo = Color(0xFF5856D6),
    teal = Color(0xFF30B0C7),
    mint = Color(0xFF00C7BE),
    cyan = Color(0xFF32ADE6),
    brown = Color(0xFFA2845E),
    gray = Color(0xFF8E8E93),
    isDark = false,
)

val DarkColors = Colors(
    surface = Color(0xFF000000),
    surfaceSecondary = Color(0xFF161617),
    surfaceTertiary = Color(0xFF2C2C2E),
    surfaceRaised = Color(0xFF1D1D1F),
    label = Color(0xFFF5F5F7),
    labelSecondary = Color(0xFFA1A1A6),
    labelTertiary = Color(0xFF86868B),
    labelQuaternary = Color(0xFF424245),
    control = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    controlPressed = Color(0xFFFFFFFF).copy(alpha = 0.22f),
    controlSelected = Color(0xFFF5F5F7),
    controlDisabled = Color(0xFFFFFFFF).copy(alpha = 0.05f),
    onControlSelected = Color(0xFF000000),
    itemPressed = Color(0xFFFFFFFF).copy(alpha = 0.12f),
    itemSelected = Color(0xFFFFFFFF).copy(alpha = 0.1f),
    separator = Color(0xFF424245),
    separatorStrong = Color(0xFF6E6E73),
    accent = Color(0xFF0071E3),
    accentPressed = Color(0xFF004D9E),
    accentSelected = Color(0xFF0071E3),
    accentDisabled = Color(0xFF0071E3).copy(alpha = 0.4f),
    onAccent = Color(0xFFFFFFFF),
    accentSurface = Color(0xFF0071E3).copy(alpha = 0.18f),
    accentSurfacePressed = Color(0xFF0071E3).copy(alpha = 0.3f),
    link = Color(0xFF2997FF),
    focus = Color(0xFF0071E3),
    scrim = Color(0xFF000000).copy(alpha = 0.48f),
    media = Color(0xFF000000),
    onMedia = Color(0xFFFFFFFF),
    danger = Color(0xFFFF5447),
    dangerSurface = Color(0xFFFF453A).copy(alpha = 0.2f),
    dangerSurfacePressed = Color(0xFFFF453A).copy(alpha = 0.36f),
    success = Color(0xFF30D158),
    successSurface = Color(0xFF30D158).copy(alpha = 0.16f),
    warning = Color(0xFFFF9F0A),
    warningSurface = Color(0xFFFF9F0A).copy(alpha = 0.16f),
    blue = Color(0xFF0A84FF),
    green = Color(0xFF30D158),
    orange = Color(0xFFFF9F0A),
    red = Color(0xFFFF453A),
    yellow = Color(0xFFFFD60A),
    purple = Color(0xFFBF5AF2),
    pink = Color(0xFFFF375F),
    indigo = Color(0xFF5E5CE6),
    teal = Color(0xFF40C8E0),
    mint = Color(0xFF66D4CF),
    cyan = Color(0xFF64D2FF),
    brown = Color(0xFFAC8E68),
    gray = Color(0xFF8E8E93),
    isDark = true,
)

object Radius {
    val xs = 3.dp
    val sm = 5.dp
    val md = 8.dp
    val lg = 10.dp
    val xl = 12.dp
    val xl2 = 18.dp
    val xl3 = 28.dp
    val full = 9999.dp
}

object Typography {
    val xs3 = textStyle(11.0, 13.0, 0.006)
    val xs2 = textStyle(12.0, 16.0, 0.0)
    val xs = textStyle(13.0, 18.0, -0.006)
    val sm = textStyle(15.0, 20.0, -0.016)
    val md = textStyle(16.0, 21.0, -0.02)
    val base = textStyle(17.0, 22.0, -0.026)
    val lg = textStyle(20.0, 25.0, -0.023)
    val xl = textStyle(22.0, 28.0, -0.012)
    val xl2 = textStyle(28.0, 34.0, 0.014)
    val xl3 = textStyle(34.0, 41.0, 0.012)

    val all = listOf(xs3, xs2, xs, sm, md, base, lg, xl, xl2, xl3)
}

object Shadows {
    val md = Shadow(2.dp, 4.dp, 12.dp, Color.Black.copy(alpha = 0.08f))
    val lg = Shadow(0.dp, 4.dp, 24.dp, Color.Black.copy(alpha = 0.12f))
}
```

3. Copy the source and every file it uses:

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

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.IntrinsicSize
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.selection.selectableGroup
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.DisposableEffect
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateMapOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.geometry.Rect
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.RectangleShape
import androidx.compose.ui.layout.boundsInParent
import androidx.compose.ui.layout.onPlaced
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.shadow
import kotlin.math.roundToInt
import kotlinx.coroutines.launch

private val IndicatorEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

private class ToggleGroupIndicator {
    val bounds = mutableStateMapOf<String, Rect>()
    val active = mutableStateMapOf<String, Boolean>()
}

private class ToggleGroupState(
    val isSelected: (String) -> Boolean,
    val toggle: (String) -> Unit,
    val variant: ToggleVariant,
    val size: ToggleSize,
    val spacing: Int,
    val orientation: Orientation,
    val enabled: Boolean,
    val multiple: Boolean,
    val selected: String? = null,
    val indicator: ToggleGroupIndicator? = null,
) {
    val segmented: Boolean get() = spacing == 0 && variant == ToggleVariant.Default
    val attached: Boolean get() = spacing == 0 && variant == ToggleVariant.Outline
}

private val LocalToggleGroupState = staticCompositionLocalOf<ToggleGroupState?> { null }

@Composable
fun ToggleGroup(
    value: String?,
    onValueChange: (String?) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    content: @Composable () -> Unit,
) {
    val indicator = remember { ToggleGroupIndicator() }
    val state = ToggleGroupState(
        isSelected = { it == value },
        toggle = { onValueChange(if (it == value) null else it) },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
        multiple = false,
        selected = value,
        indicator = if (spacing == 0 && variant == ToggleVariant.Default) indicator else null,
    )
    ToggleGroupLayout(state, modifier, content)
}

@Composable
fun ToggleGroup(
    values: Set<String>,
    onValuesChange: (Set<String>) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    content: @Composable () -> Unit,
) {
    val state = ToggleGroupState(
        isSelected = { it in values },
        toggle = { onValuesChange(if (it in values) values - it else values + it) },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
        multiple = true,
    )
    ToggleGroupLayout(state, modifier, content)
}

@Composable
private fun ToggleGroupLayout(
    state: ToggleGroupState,
    modifier: Modifier,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    val vertical = state.orientation == Orientation.Vertical
    val base = modifier.then(if (state.multiple) Modifier else Modifier.selectableGroup())
    CompositionLocalProvider(LocalToggleGroupState provides state) {
        if (state.attached) {
            val shape = RoundedCornerShape(if (vertical) Radius.xl else Radius.lg)
            FormDividedStack(
                orientation = state.orientation,
                dividerColor = colors.separator,
                modifier = base.clip(shape).border(1.dp, colors.separator, shape),
                content = content,
            )
        } else {
            val gap = if (state.segmented) 4.dp else (state.spacing * 4).dp
            val container = if (state.segmented) {
                val shape = RoundedCornerShape(Radius.xl)
                base.clip(shape).background(colors.control, shape).padding(4.dp)
            } else {
                base
            }
            val indicator = state.indicator
            if (indicator != null) {
                Box(modifier = if (vertical) container.width(IntrinsicSize.Max) else container) {
                    if (state.enabled) ToggleGroupIndicatorLayer(indicator, state.selected)
                    ToggleGroupStack(vertical, gap, if (vertical) Modifier.fillMaxWidth() else Modifier, content)
                }
            } else {
                ToggleGroupStack(vertical, gap, if (vertical) container.width(IntrinsicSize.Max) else container, content)
            }
        }
    }
}

@Composable
private fun ToggleGroupStack(
    vertical: Boolean,
    gap: Dp,
    modifier: Modifier,
    content: @Composable () -> Unit,
) {
    if (vertical) {
        Column(
            modifier = modifier,
            verticalArrangement = Arrangement.spacedBy(gap),
        ) {
            content()
        }
    } else {
        Row(
            modifier = modifier,
            horizontalArrangement = Arrangement.spacedBy(gap),
            verticalAlignment = Alignment.CenterVertically,
        ) {
            content()
        }
    }
}

@Composable
private fun ToggleGroupIndicatorLayer(indicator: ToggleGroupIndicator, selected: String?) {
    val colors = EsuissTheme.colors
    val density = LocalDensity.current
    val reduced = formReducedMotion()
    val target = selected?.takeIf { indicator.active[it] != false }?.let { indicator.bounds[it] } ?: return
    val left = remember { Animatable(target.left) }
    val top = remember { Animatable(target.top) }
    val width = remember { Animatable(target.width) }
    val height = remember { Animatable(target.height) }
    LaunchedEffect(target) {
        if (reduced) {
            left.snapTo(target.left)
            top.snapTo(target.top)
            width.snapTo(target.width)
            height.snapTo(target.height)
        } else {
            val spec = tween<Float>(300, easing = IndicatorEasing)
            launch { left.animateTo(target.left, spec) }
            launch { top.animateTo(target.top, spec) }
            launch { width.animateTo(target.width, spec) }
            launch { height.animateTo(target.height, spec) }
        }
    }
    val shape = RoundedCornerShape(Radius.md)
    Box(
        modifier = Modifier
            .offset { IntOffset(left.value.roundToInt(), top.value.roundToInt()) }
            .size(with(density) { width.value.toDp() }, with(density) { height.value.toDp() })
            .shadow(FormShadowSm, shape)
            .background(if (colors.isDark) colors.labelQuaternary else colors.surfaceRaised, shape),
    )
}

@Composable
fun ToggleGroupItem(
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val group = LocalToggleGroupState.current ?: return
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val touching by source.collectIsPressedAsState()
    val haptics = rememberHaptics()
    val on = group.isSelected(value)
    val active = enabled && group.enabled
    val fill = if (group.orientation == Orientation.Vertical) Modifier.fillMaxWidth() else Modifier
    val semantics = modifier
        .then(fill)
        .toggleSemantics(on, active, source, group.multiple) {
            if (group.multiple) haptics.toggle(!on) else haptics.selection()
            group.toggle(value)
        }
    val indicator = group.indicator
    if (indicator != null) {
        SideEffect { indicator.active[value] = active }
        DisposableEffect(indicator, value) {
            onDispose {
                indicator.bounds.remove(value)
                indicator.active.remove(value)
            }
        }
    }
    val sliding = indicator != null && on && active
    when {
        group.segmented -> {
            val shape = RoundedCornerShape(Radius.md)
            val background = when {
                !on || sliding -> Color.Transparent
                !active -> colors.controlDisabled
                colors.isDark -> colors.labelQuaternary
                else -> colors.surfaceRaised
            }
            val foreground = when {
                !active -> colors.labelQuaternary
                on -> colors.label
                else -> colors.labelSecondary
            }
            val placed = if (indicator != null) {
                semantics.onPlaced { indicator.bounds[value] = it.boundsInParent() }
            } else {
                semantics
            }
            ToggleSurface(
                modifier = placed.then(if (on && active && !sliding) Modifier.shadow(FormShadowSm, shape) else Modifier),
                size = group.size,
                shape = shape,
                outlined = false,
                background = background,
                foreground = foreground,
                scaled = false,
                horizontalPadding = 12.dp,
                content = content,
            )
        }
        else -> ToggleSurface(
            modifier = semantics,
            size = group.size,
            shape = if (group.attached) RectangleShape else RoundedCornerShape(Radius.lg),
            outlined = !group.attached && group.variant == ToggleVariant.Outline,
            background = toggleBackground(colors, on, active, touching),
            foreground = toggleForeground(colors, on, active),
            scaled = touching && active,
            content = content,
        )
    }
}

@Composable
fun ToggleGroupItem(
    text: String,
    value: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    ToggleGroupItem(value, modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}
```

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

import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.selection.triStateToggleable
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.error
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.state.ToggleableState
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.Check
import com.adamglin.phosphoricons.regular.Minus
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.shadow

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    TriStateCheckbox(
        state = ToggleableState(checked),
        onClick = onCheckedChange?.let { { it(!checked) } },
        modifier = modifier,
        enabled = enabled,
        invalid = invalid,
        interactionSource = interactionSource,
    )
}

@Composable
fun TriStateCheckbox(
    state: ToggleableState,
    onClick: (() -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = LocalFieldState.current.invalid,
    interactionSource: MutableInteractionSource? = null,
) {
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val pressed by source.collectIsPressedAsState()
    val on = state != ToggleableState.Off
    val shape = RoundedCornerShape(4.dp)
    val look = selectionControlLook(colors, on, enabled, invalid, pressed)
    val toggle = if (onClick != null) {
        Modifier
            .triStateToggleable(
                state = state,
                interactionSource = source,
                indication = null,
                enabled = enabled,
                role = Role.Checkbox,
                onClick = {
                    haptics.toggle(state != ToggleableState.On)
                    onClick()
                },
            )
            .formTouchTarget()
    } else {
        Modifier
    }
    Box(
        modifier = modifier
            .then(toggle)
            .then(if (invalid) Modifier.semantics { error("Invalid") } else Modifier)
            .size(16.dp)
            .then(if (look.shadow) Modifier.shadow(FormShadowXs, shape) else Modifier)
            .background(look.background, shape)
            .border(1.dp, look.border, shape),
        contentAlignment = Alignment.Center,
    ) {
        if (on) {
            Icon(
                if (state == ToggleableState.Indeterminate) PhosphorIcons.Regular.Minus else PhosphorIcons.Regular.Check,
                contentDescription = null,
                size = 14.dp,
                tint = colors.onAccent,
            )
        }
    }
}

internal class SelectionControlLook(val background: Color, val border: Color, val shadow: Boolean)

internal fun selectionControlLook(
    colors: Colors,
    on: Boolean,
    enabled: Boolean,
    invalid: Boolean,
    pressed: Boolean,
): SelectionControlLook = when {
    on && !enabled -> SelectionControlLook(colors.accentDisabled, Color.Transparent, false)
    on -> {
        val color = if (pressed) colors.accentPressed else colors.accent
        SelectionControlLook(color, color, false)
    }
    !enabled -> SelectionControlLook(
        colors.controlDisabled,
        if (colors.isDark) Color.Transparent else colors.label.copy(alpha = 0.1f),
        false,
    )
    colors.isDark -> SelectionControlLook(
        colors.labelQuaternary,
        if (invalid) colors.danger else Color.Transparent,
        false,
    )
    else -> SelectionControlLook(
        if (pressed) colors.control else colors.surface,
        if (invalid) colors.danger else colors.label.copy(alpha = 0.25f),
        true,
    )
}
```

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

import androidx.compose.runtime.compositionLocalOf
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp

val LocalContentStyle = compositionLocalOf { TextStyle.Default }

val LocalContentColor = compositionLocalOf { Color.Unspecified }

val LocalIconSize = compositionLocalOf { 20.dp }
```

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

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.ColumnScope
import androidx.compose.foundation.layout.LayoutScopeMarker
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.heightIn
import androidx.compose.foundation.layout.padding
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.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalConfiguration
import androidx.compose.ui.semantics.LiveRegionMode
import androidx.compose.ui.semantics.heading
import androidx.compose.ui.semantics.liveRegion
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class FieldOrientation { Vertical, Horizontal, Responsive }

enum class FieldGroupVariant { Default, Inset }

enum class FieldLegendVariant { Legend, Label }

@Immutable
internal class FieldState(val enabled: Boolean, val invalid: Boolean)

internal val LocalFieldState = staticCompositionLocalOf { FieldState(enabled = true, invalid = false) }

private val LocalFieldSetInset = staticCompositionLocalOf { false }

private val LocalFieldGroupVariant = staticCompositionLocalOf<FieldGroupVariant?> { null }

private val LocalFieldInset = staticCompositionLocalOf { false }

@LayoutScopeMarker
@Immutable
interface FieldScope {
    fun Modifier.weight(weight: Float): Modifier
}

private class RowFieldScope(private val scope: RowScope) : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = with(scope) { this@weight.weight(weight, true) }
}

private object ColumnFieldScope : FieldScope {
    override fun Modifier.weight(weight: Float): Modifier = this
}

@Composable
fun FieldSet(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    enabled: Boolean = true,
    content: @Composable ColumnScope.() -> Unit,
) {
    val inset = variant == FieldGroupVariant.Inset
    CompositionLocalProvider(
        LocalFieldSetInset provides inset,
        LocalFieldState provides FieldState(enabled, LocalFieldState.current.invalid),
    ) {
        Column(
            modifier = modifier.fillMaxWidth(),
            verticalArrangement = Arrangement.spacedBy(if (inset) 8.dp else 24.dp),
            content = content,
        )
    }
}

@Composable
fun FieldLegend(
    text: String,
    modifier: Modifier = Modifier,
    variant: FieldLegendVariant = FieldLegendVariant.Legend,
) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    val enabled = LocalFieldState.current.enabled
    val style = if (inset) {
        Typography.xs.copy(color = if (enabled) colors.labelSecondary else colors.labelQuaternary)
    } else {
        Typography.base.copy(color = if (enabled) colors.label else colors.labelQuaternary, fontWeight = FontWeight.SemiBold)
    }
    BasicText(
        text = if (inset) text.uppercase() else text,
        modifier = modifier
            .then(if (variant == FieldLegendVariant.Legend) Modifier.semantics { heading() } else Modifier)
            .padding(start = if (inset) 16.dp else 0.dp, bottom = if (inset) 0.dp else 12.dp),
        style = style,
    )
}

@Composable
fun FieldGroup(
    modifier: Modifier = Modifier,
    variant: FieldGroupVariant = FieldGroupVariant.Default,
    content: @Composable () -> Unit,
) {
    val colors = EsuissTheme.colors
    CompositionLocalProvider(
        LocalFieldSetInset provides false,
        LocalFieldGroupVariant provides variant,
    ) {
        if (variant == FieldGroupVariant.Inset) {
            FormDividedStack(
                orientation = Orientation.Vertical,
                dividerColor = colors.separator,
                modifier = modifier
                    .fillMaxWidth()
                    .clip(RoundedCornerShape(Radius.xl2))
                    .background(colors.surfaceSecondary),
                dividerInsetStart = 16.dp,
                content = content,
            )
        } else {
            Column(
                modifier = modifier.fillMaxWidth(),
                verticalArrangement = Arrangement.spacedBy(28.dp),
            ) {
                content()
            }
        }
    }
}

@Composable
fun Field(
    modifier: Modifier = Modifier,
    orientation: FieldOrientation = FieldOrientation.Vertical,
    enabled: Boolean = LocalFieldState.current.enabled,
    invalid: Boolean = false,
    content: @Composable FieldScope.() -> Unit,
) {
    val inset = LocalFieldGroupVariant.current == FieldGroupVariant.Inset
    val horizontal = when (orientation) {
        FieldOrientation.Vertical -> false
        FieldOrientation.Horizontal -> true
        FieldOrientation.Responsive -> LocalConfiguration.current.screenWidthDp >= 768
    }
    val sizing = modifier
        .fillMaxWidth()
        .then(if (inset) Modifier.heightIn(min = 44.dp).padding(horizontal = 16.dp, vertical = 6.dp) else Modifier)
    CompositionLocalProvider(
        LocalFieldGroupVariant provides null,
        LocalFieldInset provides inset,
        LocalFieldState provides FieldState(enabled, invalid),
    ) {
        if (horizontal) {
            Row(
                modifier = sizing,
                horizontalArrangement = Arrangement.spacedBy(12.dp),
                verticalAlignment = Alignment.CenterVertically,
            ) {
                val scope = remember(this) { RowFieldScope(this) }
                scope.content()
            }
        } else {
            Column(
                modifier = sizing,
                verticalArrangement = Arrangement.spacedBy(12.dp, Alignment.CenterVertically),
            ) {
                ColumnFieldScope.content()
            }
        }
    }
}

@Composable
fun FieldScope.FieldContent(
    modifier: Modifier = Modifier,
    content: @Composable ColumnScope.() -> Unit,
) {
    Column(
        modifier = modifier.weight(1f),
        verticalArrangement = Arrangement.spacedBy(4.dp),
        content = content,
    )
}

@Composable
fun FieldLabel(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = if (LocalFieldInset.current) FontWeight.Normal else FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldTitle(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val enabled = LocalFieldState.current.enabled
    BasicText(
        text = text,
        modifier = modifier,
        style = Typography.base.copy(
            color = if (enabled) colors.label else colors.labelQuaternary,
            fontWeight = FontWeight.SemiBold,
        ),
    )
}

@Composable
fun FieldDescription(text: String, modifier: Modifier = Modifier) {
    val colors = EsuissTheme.colors
    val inset = LocalFieldSetInset.current
    BasicText(
        text = text,
        modifier = modifier.padding(start = if (inset) 16.dp else 0.dp),
        style = (if (inset) Typography.xs else Typography.sm).copy(color = colors.labelSecondary),
    )
}

@Composable
fun FieldSeparator(
    modifier: Modifier = Modifier,
    text: String? = null,
) {
    val colors = EsuissTheme.colors
    Box(
        modifier = modifier
            .fillMaxWidth()
            .layout { measurable, constraints ->
                val placeable = measurable.measure(constraints)
                val overlap = 8.dp.roundToPx()
                val height = (placeable.height - overlap * 2).coerceAtLeast(0)
                layout(placeable.width, height) { placeable.place(0, -overlap) }
            }
            .heightIn(min = 20.dp),
        contentAlignment = Alignment.Center,
    ) {
        Separator()
        if (text != null) {
            BasicText(
                text = text,
                modifier = Modifier.background(colors.surface).padding(horizontal = 8.dp),
                style = Typography.sm.copy(color = colors.labelSecondary),
            )
        }
    }
}

@Composable
fun FieldError(text: String?, modifier: Modifier = Modifier) {
    if (text.isNullOrEmpty()) return
    BasicText(
        text = text,
        modifier = modifier.semantics { liveRegion = LiveRegionMode.Polite },
        style = Typography.sm.copy(color = EsuissTheme.colors.danger),
    )
}

@Composable
fun FieldError(errors: List<String?>, modifier: Modifier = Modifier) {
    val messages = errors.filterNotNull().filter { it.isNotEmpty() }.distinct()
    val text = when (messages.size) {
        0 -> null
        1 -> messages[0]
        else -> messages.joinToString("\n") { "• $it" }
    }
    FieldError(text, modifier)
}
```

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

import android.provider.Settings
import androidx.compose.animation.core.CubicBezierEasing
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.text.selection.TextSelectionColors
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.draw.drawWithContent
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.geometry.Size
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.layout.Layout
import androidx.compose.ui.layout.layout
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.unit.Constraints
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.LayoutDirection
import androidx.compose.ui.unit.constrainHeight
import androidx.compose.ui.unit.constrainWidth
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.Shadow

internal val FormShadowXs = Shadow(0.dp, 1.dp, 2.dp, Color.Black.copy(alpha = 0.05f))

internal val FormShadowSm = Shadow(0.dp, 1.dp, 3.dp, Color.Black.copy(alpha = 0.1f))

internal val FormEasing = CubicBezierEasing(0.32f, 0.72f, 0f, 1f)

internal fun Modifier.formTouchTarget(): Modifier = layout { measurable, constraints ->
    val minimum = 48.dp.roundToPx()
    val placeable = measurable.measure(constraints)
    val width = constraints.constrainWidth(maxOf(placeable.width, minimum))
    val height = constraints.constrainHeight(maxOf(placeable.height, minimum))
    layout(width, height) {
        placeable.place((width - placeable.width) / 2, (height - placeable.height) / 2)
    }
}

@Composable
internal fun formReducedMotion(): Boolean {
    val context = LocalContext.current
    return remember(context) {
        Settings.Global.getFloat(context.contentResolver, Settings.Global.ANIMATOR_DURATION_SCALE, 1f) == 0f
    }
}

internal fun formSelectionColors(colors: Colors) = TextSelectionColors(
    handleColor = colors.accent,
    backgroundColor = colors.accent.copy(alpha = 0.3f),
)

internal fun Modifier.formInputSurface(
    colors: Colors,
    shape: Shape,
    focused: Boolean,
    invalid: Boolean,
    enabled: Boolean,
): Modifier {
    val background = when {
        !enabled -> colors.controlDisabled
        invalid -> colors.danger.copy(alpha = if (colors.isDark) 0.1f else 0.05f)
        else -> colors.control
    }
    val border = when {
        invalid -> colors.danger
        focused -> colors.focus
        else -> Color.Transparent
    }
    return clip(shape).background(background, shape).border(1.dp, border, shape)
}

@Composable
internal fun FormDividedStack(
    orientation: Orientation,
    dividerColor: Color,
    modifier: Modifier = Modifier,
    dividerInsetStart: Dp = 0.dp,
    content: @Composable () -> Unit,
) {
    val boundaries = remember { mutableStateOf(IntArray(0)) }
    val vertical = orientation == Orientation.Vertical
    Layout(
        content = content,
        modifier = modifier.drawWithContent {
            drawContent()
            val stroke = 1.dp.toPx()
            val inset = dividerInsetStart.toPx()
            boundaries.value.forEach { position ->
                if (vertical) {
                    val start = if (layoutDirection == LayoutDirection.Rtl) 0f else inset
                    drawRect(dividerColor, Offset(start, position.toFloat()), Size(size.width - inset, stroke))
                } else {
                    val x = if (layoutDirection == LayoutDirection.Rtl) size.width - position - stroke else position.toFloat()
                    drawRect(dividerColor, Offset(x, 0f), Size(stroke, size.height))
                }
            }
        },
    ) { measurables, constraints ->
        if (vertical) {
            val width = if (constraints.hasFixedWidth) {
                constraints.maxWidth
            } else {
                constraints.constrainWidth(measurables.maxOfOrNull { it.maxIntrinsicWidth(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minWidth = width, maxWidth = width))
            }
            val offsets = IntArray(placeables.size)
            var y = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = y
                y += placeable.height
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(width, constraints.constrainHeight(y)) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(0, offsets[index]) }
            }
        } else {
            val height = if (constraints.hasFixedHeight) {
                constraints.maxHeight
            } else {
                constraints.constrainHeight(measurables.maxOfOrNull { it.maxIntrinsicHeight(Constraints.Infinity) } ?: 0)
            }
            val placeables = measurables.map {
                it.measure(Constraints(minHeight = height, maxHeight = height))
            }
            val offsets = IntArray(placeables.size)
            var x = 0
            placeables.forEachIndexed { index, placeable ->
                offsets[index] = x
                x += placeable.width
            }
            val next = offsets.drop(1).toIntArray()
            if (!next.contentEquals(boundaries.value)) boundaries.value = next
            layout(constraints.constrainWidth(x), height) {
                placeables.forEachIndexed { index, placeable -> placeable.placeRelative(offsets[index], 0) }
            }
        }
    }
}
```

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

import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.remember
import androidx.compose.runtime.staticCompositionLocalOf
import androidx.compose.ui.hapticfeedback.HapticFeedback
import androidx.compose.ui.hapticfeedback.HapticFeedbackType
import androidx.compose.ui.platform.LocalHapticFeedback

val LocalHapticsEnabled = staticCompositionLocalOf { true }

@Composable
fun ProvideHaptics(enabled: Boolean, content: @Composable () -> Unit) {
    CompositionLocalProvider(LocalHapticsEnabled provides enabled, content = content)
}

internal class Haptics(private val feedback: HapticFeedback, private val enabled: Boolean) {
    fun perform(type: HapticFeedbackType) {
        if (enabled) feedback.performHapticFeedback(type)
    }

    fun toggle(on: Boolean) = perform(if (on) HapticFeedbackType.ToggleOn else HapticFeedbackType.ToggleOff)

    fun selection() = perform(HapticFeedbackType.SegmentTick)
}

@Composable
internal fun rememberHaptics(): Haptics {
    val feedback = LocalHapticFeedback.current
    val enabled = LocalHapticsEnabled.current
    return remember(feedback, enabled) { Haptics(feedback, enabled) }
}
```

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

import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.ColorFilter
import androidx.compose.ui.graphics.takeOrElse
import androidx.compose.ui.graphics.vector.ImageVector
import androidx.compose.ui.unit.Dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Icon(
    imageVector: ImageVector,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    size: Dp = LocalIconSize.current,
    tint: Color = LocalContentColor.current.takeOrElse { EsuissTheme.colors.label },
) {
    Image(
        imageVector = imageVector,
        contentDescription = contentDescription,
        modifier = modifier.size(size),
        colorFilter = ColorFilter.tint(tint),
    )
}
```

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

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Typography

@Composable
fun Label(
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val color = if (enabled) colors.label else colors.labelQuaternary
    Row(
        modifier = modifier,
        horizontalArrangement = Arrangement.spacedBy(8.dp),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.base.copy(color = color, fontWeight = FontWeight.SemiBold),
            LocalContentColor provides color,
        ) {
            content()
        }
    }
}

@Composable
fun Label(
    text: String,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
) {
    Label(modifier, enabled) {
        BasicText(text, style = LocalContentStyle.current)
    }
}
```

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

import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxHeight
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.width
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.EsuissTheme

@Composable
fun Separator(
    modifier: Modifier = Modifier,
    orientation: Orientation = Orientation.Horizontal,
) {
    val sizing = if (orientation == Orientation.Horizontal) {
        Modifier.fillMaxWidth().height(1.dp)
    } else {
        Modifier.fillMaxHeight().width(1.dp)
    }
    Box(modifier.then(sizing).background(EsuissTheme.colors.separator))
}
```

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

import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.tween
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.interaction.collectIsPressedAsState
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.RowScope
import androidx.compose.foundation.layout.defaultMinSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.toggleable
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.getValue
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.graphics.graphicsLayer
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.unit.Dp
import androidx.compose.ui.unit.dp
import com.esuiss.ui.theme.Colors
import com.esuiss.ui.theme.EsuissTheme
import com.esuiss.ui.theme.Radius
import com.esuiss.ui.theme.Typography

enum class ToggleVariant { Default, Outline }

enum class ToggleSize(internal val height: Dp, internal val horizontalPadding: Dp) {
    Default(36.dp, 12.dp),
    Sm(32.dp, 12.dp),
    Lg(40.dp, 16.dp),
}

@Composable
fun Toggle(
    pressed: Boolean,
    onPressedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit,
) {
    val source = interactionSource ?: remember { MutableInteractionSource() }
    val touching by source.collectIsPressedAsState()
    val colors = EsuissTheme.colors
    val haptics = rememberHaptics()
    ToggleSurface(
        modifier = modifier.toggleSemantics(pressed, enabled, source, multiple = true) {
            haptics.toggle(!pressed)
            onPressedChange(!pressed)
        },
        size = size,
        shape = RoundedCornerShape(Radius.lg),
        outlined = variant == ToggleVariant.Outline,
        background = toggleBackground(colors, pressed, enabled, touching),
        foreground = toggleForeground(colors, pressed, enabled),
        scaled = touching && enabled,
        content = content,
    )
}

@Composable
fun Toggle(
    text: String,
    pressed: Boolean,
    onPressedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    enabled: Boolean = true,
) {
    Toggle(pressed, onPressedChange, modifier, variant, size, enabled) {
        BasicText(text, style = LocalContentStyle.current, maxLines = 1)
    }
}

internal fun toggleBackground(colors: Colors, on: Boolean, enabled: Boolean, touching: Boolean): Color = when {
    !enabled -> if (on) colors.controlDisabled else Color.Transparent
    on -> if (touching) colors.itemPressed else colors.itemSelected
    touching -> colors.itemPressed
    else -> Color.Transparent
}

internal fun toggleForeground(colors: Colors, on: Boolean, enabled: Boolean): Color = when {
    !enabled -> colors.labelQuaternary
    on -> colors.link
    else -> colors.label
}

@Composable
internal fun ToggleSurface(
    modifier: Modifier,
    size: ToggleSize,
    shape: Shape,
    outlined: Boolean,
    background: Color,
    foreground: Color,
    scaled: Boolean,
    horizontalPadding: Dp = size.horizontalPadding,
    content: @Composable RowScope.() -> Unit,
) {
    val colors = EsuissTheme.colors
    val scale by animateFloatAsState(if (scaled) 0.96f else 1f, tween(150), label = "toggle")
    Row(
        modifier = modifier
            .graphicsLayer {
                scaleX = scale
                scaleY = scale
            }
            .height(size.height)
            .defaultMinSize(minWidth = size.height)
            .clip(shape)
            .background(background, shape)
            .then(if (outlined) Modifier.border(1.dp, colors.separator, shape) else Modifier)
            .padding(horizontal = horizontalPadding),
        horizontalArrangement = Arrangement.spacedBy(4.dp, Alignment.CenterHorizontally),
        verticalAlignment = Alignment.CenterVertically,
    ) {
        CompositionLocalProvider(
            LocalContentStyle provides Typography.sm.copy(color = foreground),
            LocalContentColor provides foreground,
            LocalIconSize provides 16.dp,
        ) {
            content()
        }
    }
}

internal fun Modifier.toggleSemantics(
    on: Boolean,
    enabled: Boolean,
    source: MutableInteractionSource,
    multiple: Boolean,
    onClick: () -> Unit,
): Modifier = if (multiple) {
    toggleable(
        value = on,
        interactionSource = source,
        indication = null,
        enabled = enabled,
        role = Role.Checkbox,
        onValueChange = { onClick() },
    )
} else {
    selectable(
        selected = on,
        interactionSource = source,
        indication = null,
        enabled = enabled,
        role = Role.RadioButton,
        onClick = onClick,
    )
}
```

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

## Usage

```tsx
import { ToggleGroup, ToggleGroupItem, ToggleGroupIcon } from "@/components/ui/toggle-group"
```

```tsx
<FormattingDemo />
```

The value is always an array of strings. Use `value` and `onValueChange` for controlled use, or `defaultValue`. Set `multiple` to allow more than one pressed item; without it, pressing an item replaces the selection.

Give each `ToggleGroupItem` a `value`. Put icons in a `ToggleGroupIcon`, which sizes them to 16 points, and give icon-only items an `accessibilityLabel`. `orientation` switches between a row and a column, and `disabled` on the group turns off every item.

## Examples

### Outline

The `outline` variant.

![Preview](https://uim.suiss.app/previews/components-toggle-group--outline.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupOutlineExample() {
  return (
    <FormattingDemo variant="outline" initial={["italic"]} />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupOutlineExample: View {
  var body: some View {
    FormattingDemo(initial: ["italic"], variant: .outline)
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupOutlineExample() {
    ToggleGroupFormatting(variant = ToggleVariant.Outline, initial = setOf("italic"))
}

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

### Attached

Outlined items joined into one strip with `spacing={0}`.

![Preview](https://uim.suiss.app/previews/components-toggle-group--attached.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupAttachedExample() {
  return (
    <FormattingDemo variant="outline" spacing={0} />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupAttachedExample: View {
  var body: some View {
    FormattingDemo(variant: .outline, spacing: 0)
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupAttachedExample() {
    ToggleGroupFormatting(variant = ToggleVariant.Outline, spacing = 0)
}

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

### Sizes

The `sm`, `default` and `lg` sizes.

![Preview](https://uim.suiss.app/previews/components-toggle-group--sizes.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { View } from "react-native"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupSizesExample() {
  return (
    <View className="items-start gap-3">
      <FormattingDemo size="sm" />
      <FormattingDemo />
      <FormattingDemo size="lg" />
    </View>
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupSizesExample: View {
  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      FormattingDemo(size: .sm)
      FormattingDemo()
      FormattingDemo(size: .lg)
    }
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}

@Composable
fun ToggleGroupSizes() {
    Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
        ToggleGroupFormatting(size = ToggleSize.Sm)
        ToggleGroupFormatting()
        ToggleGroupFormatting(size = ToggleSize.Lg)
    }
}
```

### Segmented

A single-selection segmented control for calendar views.

![Preview](https://uim.suiss.app/previews/components-toggle-group--segmented.light.webp)

```tsx
import * as React from "react"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

const views = ["day", "week", "month", "year"]

function SegmentedDemo({
  items = views,
  ...props
}: GroupProps & { items?: string[] }) {
  const [value, setValue] = React.useState<string[]>(["week"])
  return (
    <ToggleGroup
      spacing={0}
      value={value}
      onValueChange={setValue}
      accessibilityLabel="Calendar view"
      {...props}
    >
      {items.map((item) => (
        <ToggleGroupItem key={item} value={item}>
          <Text className="capitalize">{item}</Text>
        </ToggleGroupItem>
      ))}
    </ToggleGroup>
  )
}

export function ToggleGroupSegmentedExample() {
  return (
    <SegmentedDemo />
  )
}
```

```swift
import EsuissUI
import SwiftUI

let segmentedViews = ["Day", "Week", "Month", "Year"]

struct SegmentedDemo: View {
  var items: [String] = segmentedViews
  var size: ToggleSize = .default
  var orientation: Axis = .horizontal

  @State private var value: String? = "Week"

  var body: some View {
    ToggleGroup(selection: $value, size: size, spacing: 0, orientation: orientation) {
      ForEach(items, id: \.self) { item in
        ToggleGroupItem(value: item) {
          Text(verbatim: item)
        }
      }
    }
    .accessibilityLabel(Text("Calendar view"))
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize

val toggleGroupViews = listOf("day", "week", "month", "year")

@Composable
fun ToggleGroupSegmented(
    items: List<String> = toggleGroupViews,
    size: ToggleSize = ToggleSize.Default,
    orientation: Orientation = Orientation.Horizontal,
) {
    var value by rememberSaveable { mutableStateOf<String?>("week") }
    ToggleGroup(
        value = value,
        onValueChange = { value = it },
        modifier = Modifier.semantics { contentDescription = "Calendar view" },
        size = size,
        spacing = 0,
        orientation = orientation,
    ) {
        items.forEach { item ->
            ToggleGroupItem(item.replaceFirstChar { it.uppercaseChar() }, value = item)
        }
    }
}
```

### Segmented vertical

The segmented control in a vertical orientation.

![Preview](https://uim.suiss.app/previews/components-toggle-group--segmented-vertical.light.webp)

```tsx
import * as React from "react"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

const views = ["day", "week", "month", "year"]

function SegmentedDemo({
  items = views,
  ...props
}: GroupProps & { items?: string[] }) {
  const [value, setValue] = React.useState<string[]>(["week"])
  return (
    <ToggleGroup
      spacing={0}
      value={value}
      onValueChange={setValue}
      accessibilityLabel="Calendar view"
      {...props}
    >
      {items.map((item) => (
        <ToggleGroupItem key={item} value={item}>
          <Text className="capitalize">{item}</Text>
        </ToggleGroupItem>
      ))}
    </ToggleGroup>
  )
}

export function ToggleGroupSegmentedVerticalExample() {
  return (
    <SegmentedDemo orientation="vertical" />
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct ToggleGroupSegmentedVerticalExample: View {
  var body: some View {
    SegmentedDemo(orientation: .vertical)
      .fixedSize(horizontal: true, vertical: false)
  }
}

let segmentedViews = ["Day", "Week", "Month", "Year"]

struct SegmentedDemo: View {
  var items: [String] = segmentedViews
  var size: ToggleSize = .default
  var orientation: Axis = .horizontal

  @State private var value: String? = "Week"

  var body: some View {
    ToggleGroup(selection: $value, size: size, spacing: 0, orientation: orientation) {
      ForEach(items, id: \.self) { item in
        ToggleGroupItem(value: item) {
          Text(verbatim: item)
        }
      }
    }
    .accessibilityLabel(Text("Calendar view"))
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize

@Composable
fun ToggleGroupSegmentedVerticalExample() {
    ToggleGroupSegmented(orientation = Orientation.Vertical)
}

val toggleGroupViews = listOf("day", "week", "month", "year")

@Composable
fun ToggleGroupSegmented(
    items: List<String> = toggleGroupViews,
    size: ToggleSize = ToggleSize.Default,
    orientation: Orientation = Orientation.Horizontal,
) {
    var value by rememberSaveable { mutableStateOf<String?>("week") }
    ToggleGroup(
        value = value,
        onValueChange = { value = it },
        modifier = Modifier.semantics { contentDescription = "Calendar view" },
        size = size,
        spacing = 0,
        orientation = orientation,
    ) {
        items.forEach { item ->
            ToggleGroupItem(item.replaceFirstChar { it.uppercaseChar() }, value = item)
        }
    }
}
```

### Segmented multiple

A segmented control that allows several selected items.

![Preview](https://uim.suiss.app/previews/components-toggle-group--segmented-multiple.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupSegmentedMultipleExample() {
  return (
    <FormattingDemo spacing={0} initial={["bold", "underline"]} />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupSegmentedMultipleExample: View {
  var body: some View {
    FormattingDemo(initial: ["bold", "underline"], spacing: 0)
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupSegmentedMultipleExample() {
    ToggleGroupFormatting(spacing = 0, initial = setOf("bold", "underline"))
}

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

### Segmented sizes

Segmented controls at each size.

![Preview](https://uim.suiss.app/previews/components-toggle-group--segmented-sizes.light.webp)

```tsx
import * as React from "react"
import { View } from "react-native"
import { Text } from "@/components/ui/text"
import { ToggleGroup, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

const views = ["day", "week", "month", "year"]

function SegmentedDemo({
  items = views,
  ...props
}: GroupProps & { items?: string[] }) {
  const [value, setValue] = React.useState<string[]>(["week"])
  return (
    <ToggleGroup
      spacing={0}
      value={value}
      onValueChange={setValue}
      accessibilityLabel="Calendar view"
      {...props}
    >
      {items.map((item) => (
        <ToggleGroupItem key={item} value={item}>
          <Text className="capitalize">{item}</Text>
        </ToggleGroupItem>
      ))}
    </ToggleGroup>
  )
}

export function ToggleGroupSegmentedSizesExample() {
  return (
    <View className="items-start gap-3">
      <SegmentedDemo size="sm" items={views.slice(0, 3)} />
      <SegmentedDemo items={views.slice(0, 3)} />
      <SegmentedDemo size="lg" items={views.slice(0, 3)} />
    </View>
  )
}
```

```swift
import EsuissUI
import SwiftUI

struct ToggleGroupSegmentedSizesExample: View {
  var body: some View {
    VStack(alignment: .leading, spacing: 12) {
      SegmentedDemo(items: Array(segmentedViews.prefix(3)), size: .sm)
      SegmentedDemo(items: Array(segmentedViews.prefix(3)))
      SegmentedDemo(items: Array(segmentedViews.prefix(3)), size: .lg)
    }
  }
}

let segmentedViews = ["Day", "Week", "Month", "Year"]

struct SegmentedDemo: View {
  var items: [String] = segmentedViews
  var size: ToggleSize = .default
  var orientation: Axis = .horizontal

  @State private var value: String? = "Week"

  var body: some View {
    ToggleGroup(selection: $value, size: size, spacing: 0, orientation: orientation) {
      ForEach(items, id: \.self) { item in
        ToggleGroupItem(value: item) {
          Text(verbatim: item)
        }
      }
    }
    .accessibilityLabel(Text("Calendar view"))
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Column
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.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.dp
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize

val toggleGroupViews = listOf("day", "week", "month", "year")

@Composable
fun ToggleGroupSegmented(
    items: List<String> = toggleGroupViews,
    size: ToggleSize = ToggleSize.Default,
    orientation: Orientation = Orientation.Horizontal,
) {
    var value by rememberSaveable { mutableStateOf<String?>("week") }
    ToggleGroup(
        value = value,
        onValueChange = { value = it },
        modifier = Modifier.semantics { contentDescription = "Calendar view" },
        size = size,
        spacing = 0,
        orientation = orientation,
    ) {
        items.forEach { item ->
            ToggleGroupItem(item.replaceFirstChar { it.uppercaseChar() }, value = item)
        }
    }
}

@Composable
fun ToggleGroupSegmentedSizes() {
    val items = toggleGroupViews.take(3)
    Column(verticalArrangement = Arrangement.spacedBy(12.dp)) {
        ToggleGroupSegmented(items, ToggleSize.Sm)
        ToggleGroupSegmented(items)
        ToggleGroupSegmented(items, ToggleSize.Lg)
    }
}
```

### Single selection

Outlined alignment options where only one item can be pressed.

![Preview](https://uim.suiss.app/previews/components-toggle-group--single-selection.light.webp)

```tsx
import { TextAlignCenterIcon, TextAlignLeftIcon, TextAlignRightIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

function AlignmentDemo() {
  const [value, setValue] = React.useState<string[]>(["left"])
  return (
    <ToggleGroup value={value} onValueChange={setValue} variant="outline">
      <ToggleGroupItem value="left" accessibilityLabel="Align left">
        <ToggleGroupIcon as={TextAlignLeftIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="center" accessibilityLabel="Align center">
        <ToggleGroupIcon as={TextAlignCenterIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="right" accessibilityLabel="Align right">
        <ToggleGroupIcon as={TextAlignRightIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupSingleSelectionExample() {
  return (
    <AlignmentDemo />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct AlignmentDemo: View {
  @State private var value: String? = "left"

  var body: some View {
    ToggleGroup(selection: $value, variant: .outline) {
      ToggleGroupItem(value: "left") {
        Ph.textAlignLeft.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Align left"))
      ToggleGroupItem(value: "center") {
        Ph.textAlignCenter.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Align center"))
      ToggleGroupItem(value: "right") {
        Ph.textAlignRight.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Align right"))
    }
  }
}
```

```kotlin
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextAlignCenter
import com.adamglin.phosphoricons.regular.TextAlignLeft
import com.adamglin.phosphoricons.regular.TextAlignRight
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupAlignment() {
    var value by rememberSaveable { mutableStateOf<String?>("left") }
    ToggleGroup(value = value, onValueChange = { value = it }, variant = ToggleVariant.Outline) {
        ToggleGroupIconItem("left", "Align left", PhosphorIcons.Regular.TextAlignLeft)
        ToggleGroupIconItem("center", "Align center", PhosphorIcons.Regular.TextAlignCenter)
        ToggleGroupIconItem("right", "Align right", PhosphorIcons.Regular.TextAlignRight)
    }
}
```

### Vertical

Joined outline items stacked in a column.

![Preview](https://uim.suiss.app/previews/components-toggle-group--vertical.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupVerticalExample() {
  return (
    <FormattingDemo orientation="vertical" variant="outline" spacing={0} />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupVerticalExample: View {
  var body: some View {
    FormattingDemo(variant: .outline, spacing: 0, orientation: .vertical)
      .fixedSize(horizontal: true, vertical: false)
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupVerticalExample() {
    ToggleGroupFormatting(variant = ToggleVariant.Outline, spacing = 0, orientation = Orientation.Vertical)
}

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

### Disabled

A disabled group.

![Preview](https://uim.suiss.app/previews/components-toggle-group--disabled.light.webp)

```tsx
import { TextBIcon, TextItalicIcon, TextUnderlineIcon } from "phosphor-react-native"
import * as React from "react"
import { ToggleGroup, ToggleGroupIcon, ToggleGroupItem } from "@/components/ui/toggle-group"

type GroupProps = Omit<
  React.ComponentProps<typeof ToggleGroup>,
  "value" | "onValueChange" | "children"
>

function FormattingDemo({
  initial = ["bold"],
  ...props
}: GroupProps & { initial?: string[] }) {
  const [value, setValue] = React.useState<string[]>(initial)
  return (
    <ToggleGroup multiple value={value} onValueChange={setValue} {...props}>
      <ToggleGroupItem value="bold" accessibilityLabel="Toggle bold">
        <ToggleGroupIcon as={TextBIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="italic" accessibilityLabel="Toggle italic">
        <ToggleGroupIcon as={TextItalicIcon} />
      </ToggleGroupItem>
      <ToggleGroupItem value="underline" accessibilityLabel="Toggle underline">
        <ToggleGroupIcon as={TextUnderlineIcon} />
      </ToggleGroupItem>
    </ToggleGroup>
  )
}

export function ToggleGroupDisabledExample() {
  return (
    <FormattingDemo disabled />
  )
}
```

```swift
import EsuissUI
import PhosphorSwift
import SwiftUI

struct ToggleGroupDisabledExample: View {
  var body: some View {
    FormattingDemo()
      .disabled(true)
  }
}

struct FormattingDemo: View {
  let variant: ToggleVariant
  let size: ToggleSize
  let spacing: Int
  let orientation: Axis

  @State private var value: Set<String>

  init(
    initial: Set<String> = ["bold"],
    variant: ToggleVariant = .default,
    size: ToggleSize = .default,
    spacing: Int = 2,
    orientation: Axis = .horizontal
  ) {
    self.variant = variant
    self.size = size
    self.spacing = spacing
    self.orientation = orientation
    _value = State(initialValue: initial)
  }

  var body: some View {
    ToggleGroup(selection: $value, variant: variant, size: size, spacing: spacing, orientation: orientation) {
      ToggleGroupItem(value: "bold") {
        Ph.textB.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle bold"))
      ToggleGroupItem(value: "italic") {
        Ph.textItalic.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle italic"))
      ToggleGroupItem(value: "underline") {
        Ph.textUnderline.regular.frame(width: 16, height: 16)
      }
      .accessibilityLabel(Text("Toggle underline"))
    }
  }
}
```

```kotlin
import androidx.compose.foundation.gestures.Orientation
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.graphics.vector.ImageVector
import androidx.compose.ui.semantics.contentDescription
import androidx.compose.ui.semantics.semantics
import com.adamglin.PhosphorIcons
import com.adamglin.phosphoricons.Regular
import com.adamglin.phosphoricons.regular.TextB
import com.adamglin.phosphoricons.regular.TextItalic
import com.adamglin.phosphoricons.regular.TextUnderline
import com.esuiss.ui.components.Icon
import com.esuiss.ui.components.ToggleGroup
import com.esuiss.ui.components.ToggleGroupItem
import com.esuiss.ui.components.ToggleSize
import com.esuiss.ui.components.ToggleVariant

@Composable
fun ToggleGroupDisabledExample() {
    ToggleGroupFormatting(enabled = false)
}

@Composable
fun ToggleGroupIconItem(value: String, label: String, icon: ImageVector) {
    ToggleGroupItem(value, Modifier.semantics { contentDescription = label }) {
        Icon(icon, contentDescription = null)
    }
}

@Composable
fun ToggleGroupFormatting(
    variant: ToggleVariant = ToggleVariant.Default,
    size: ToggleSize = ToggleSize.Default,
    spacing: Int = 2,
    orientation: Orientation = Orientation.Horizontal,
    enabled: Boolean = true,
    initial: Set<String> = setOf("bold"),
) {
    var values by rememberSaveable { mutableStateOf(initial.toList()) }
    ToggleGroup(
        values = values.toSet(),
        onValuesChange = { values = it.toList() },
        variant = variant,
        size = size,
        spacing = spacing,
        orientation = orientation,
        enabled = enabled,
    ) {
        ToggleGroupIconItem("bold", "Toggle bold", PhosphorIcons.Regular.TextB)
        ToggleGroupIconItem("italic", "Toggle italic", PhosphorIcons.Regular.TextItalic)
        ToggleGroupIconItem("underline", "Toggle underline", PhosphorIcons.Regular.TextUnderline)
    }
}
```

## API Reference

### ToggleGroup

Container that holds the shared value.

### ToggleGroupItem

One toggle in the group.

### ToggleGroupIcon

Icon sized for a toggle group item.

## Accessibility

- A single-selection group has the `radiogroup` role and its items have the `radio` role.
- A `multiple` group has the `group` role and its items have the `togglebutton` role.
- Items report checked and disabled states to VoiceOver and TalkBack.
- The sliding segmented indicator is hidden from VoiceOver and TalkBack.
- Icon-only items need an `accessibilityLabel`; label the group itself with `accessibilityLabel` when its purpose is not clear from context.

## Notes

- Pressed items use `bg-item-selected` and `text-link`; the segmented indicator and pressed segmented items use `bg-surface-raised` with a small shadow in light mode and `bg-label-quaternary` in dark mode.
- The indicator slides over 300 ms and respects the system reduce motion setting. It is hidden when the selected item is disabled.
- Colors follow the system appearance.