@LayoutScopeMarker
class CurvedScope

Layout scope used for curved containers. This is the base of a DSL that specifies what components can be added to a curved layout.

Summary

Extension functions
Unit
CurvedScope.basicCurvedText(
    text: String,
    modifier: CurvedModifier,
    angularDirection: CurvedDirection.Angular?,
    overflow: TextOverflow,
    style: @Composable () -> CurvedTextStyle
)

basicCurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen).
Unit
CurvedScope.basicCurvedText(
    text: String,
    style: CurvedTextStyle,
    modifier: CurvedModifier,
    angularDirection: CurvedDirection.Angular?,
    overflow: TextOverflow
)

basicCurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen).
Unit
CurvedScope.curvedBox(
    modifier: CurvedModifier,
    radialAlignment: CurvedAlignment.Radial?,
    angularAlignment: CurvedAlignment.Angular?,
    contentBuilder: CurvedScope.() -> Unit
)

A layout composable that places its children on top of each other and on an arc.
Unit
CurvedScope.curvedColumn(
    modifier: CurvedModifier,
    radialDirection: CurvedDirection.Radial?,
    angularAlignment: CurvedAlignment.Angular?,
    contentBuilder: CurvedScope.() -> Unit
)

A curved layout composable that places its children stacked as part of an arc (the first child will be the outermost).
Unit
CurvedScope.curvedComposable(
    modifier: CurvedModifier,
    radialAlignment: CurvedAlignment.Radial,
    rotationLocked: Boolean,
    content: @Composable BoxScope.() -> Unit
)

Component that allows normal composables to be part of a CurvedLayout.
Unit
CurvedScope.curvedRow(
    modifier: CurvedModifier,
    radialAlignment: CurvedAlignment.Radial?,
    angularDirection: CurvedDirection.Angular?,
    contentBuilder: CurvedScope.() -> Unit
)

A layout composable that places its children in an arc, rotating them as needed.
Unit
CurvedScope.curvedText(
    text: String,
    modifier: CurvedModifier,
    background: Color,
    color: Color,
    fontSize: TextUnit,
    fontFamily: FontFamily?,
    fontWeight: FontWeight?,
    fontStyle: FontStyle?,
    fontSynthesis: FontSynthesis?,
    style: CurvedTextStyle?,
    angularDirection: CurvedDirection.Angular?,
    overflow: TextOverflow
)

CurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen).
Unit
CurvedScope.curvedText(
    text: String,
    modifier: CurvedModifier,
    maxSweepAngle: Float,
    background: Color,
    color: Color,
    fontSize: TextUnit,
    fontFamily: FontFamily?,
    fontWeight: FontWeight?,
    fontStyle: FontStyle?,
    fontSynthesis: FontSynthesis?,
    style: CurvedTextStyle?,
    angularDirection: CurvedDirection.Angular?,
    overflow: TextOverflow
)

CurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen).

Extension functions

basicCurvedText

fun CurvedScope.basicCurvedText(
    text: String,
    modifier: CurvedModifier = CurvedModifier,
    angularDirection: CurvedDirection.Angular? = null,
    overflow: TextOverflow = TextOverflow.Clip,
    style: @Composable () -> CurvedTextStyle = { CurvedTextStyle() }
): Unit

basicCurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen). basicCurvedText can be only created within a CurvedLayout since it's not a composable.

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.CurvedTextStyle
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.basicCurvedText
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.padding
import androidx.wear.compose.foundation.size

CurvedLayout(modifier = Modifier.fillMaxSize()) {
    basicCurvedText(
        "Curved Text",
        CurvedModifier.padding(10.dp),
        style = {
            CurvedTextStyle(fontSize = 16.sp, color = Color.Black, background = Color.White)
        }
    )
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Gray)) }
    curvedComposable {
        BasicText(
            "Normal Text",
            Modifier.padding(5.dp),
            TextStyle(fontSize = 16.sp, color = Color.Black, background = Color.White)
        )
    }
}
Parameters
text: String

The text to display
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved text.
angularDirection: CurvedDirection.Angular? = null

Specify if the text is laid out clockwise or anti-clockwise, and if those needs to be reversed in a Rtl layout. If not specified, it will be inherited from the enclosing curvedRow or CurvedLayout See CurvedDirection.Angular.
overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.
style: @Composable () -> CurvedTextStyle = { CurvedTextStyle() }

A @Composable factory to provide the style to use. This composable SHOULDN'T generate any compose nodes.

basicCurvedText

fun CurvedScope.basicCurvedText(
    text: String,
    style: CurvedTextStyle,
    modifier: CurvedModifier = CurvedModifier,
    angularDirection: CurvedDirection.Angular? = null,
    overflow: TextOverflow = TextOverflow.Clip
): Unit

basicCurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen). basicCurvedText can be only created within a CurvedLayout since it's not a composable.

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.CurvedTextStyle
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.basicCurvedText
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.padding
import androidx.wear.compose.foundation.size

CurvedLayout(modifier = Modifier.fillMaxSize()) {
    basicCurvedText(
        "Curved Text",
        CurvedModifier.padding(10.dp),
        style = {
            CurvedTextStyle(fontSize = 16.sp, color = Color.Black, background = Color.White)
        }
    )
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Gray)) }
    curvedComposable {
        BasicText(
            "Normal Text",
            Modifier.padding(5.dp),
            TextStyle(fontSize = 16.sp, color = Color.Black, background = Color.White)
        )
    }
}
Parameters
text: String

The text to display
style: CurvedTextStyle

A style to use.
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved text.
angularDirection: CurvedDirection.Angular? = null

Specify if the text is laid out clockwise or anti-clockwise, and if those needs to be reversed in a Rtl layout. If not specified, it will be inherited from the enclosing curvedRow or CurvedLayout See CurvedDirection.Angular.
overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.

curvedBox

fun CurvedScope.curvedBox(
    modifier: CurvedModifier = CurvedModifier,
    radialAlignment: CurvedAlignment.Radial? = null,
    angularAlignment: CurvedAlignment.Angular? = null,
    contentBuilder: CurvedScope.() -> Unit
): Unit

A layout composable that places its children on top of each other and on an arc. This is similar to a Box layout, but curved into a segment of an annulus.

The thickness of the layout (the difference between the outer and inner radius) will be the same as the thickest child, and the angle taken will be the biggest angle of the children.

Example usage:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.unit.dp
import androidx.wear.compose.foundation.CurvedAlignment
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.curvedBox
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.size

CurvedLayout(modifier = Modifier.fillMaxSize()) {
    curvedBox(
        modifier = CurvedModifier.background(Color.Red),
        radialAlignment = CurvedAlignment.Radial.Inner,
        angularAlignment = CurvedAlignment.Angular.End
    ) {
        curvedComposable {
            Box(modifier = Modifier.width(40.dp).height(80.dp).background(Color.Green))
        }
        curvedComposable {
            Box(modifier = Modifier.size(30.dp).clip(CircleShape).background(Color.White))
        }
    }
}
Parameters
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved row.
radialAlignment: CurvedAlignment.Radial? = null

Radial alignment specifies where to lay down children that are thinner than the CurvedBox, either closer to the center CurvedAlignment.Radial.Inner, apart from the center CurvedAlignment.Radial.Outer or in the middle point CurvedAlignment.Radial.Center. If unspecified, they can choose for themselves.
angularAlignment: CurvedAlignment.Angular? = null

Angular alignment specifies where to lay down children that are thinner than the CurvedBox, either at the CurvedAlignment.Angular.Start of the layout, at the CurvedAlignment.Angular.End, or CurvedAlignment.Angular.Center. If unspecified or null, they can choose for themselves.
contentBuilder: CurvedScope.() -> Unit

Specifies the content of this layout, currently there are 5 available elements defined in foundation for this DSL: the sub-layouts curvedBox, curvedRow and curvedColumn, basicCurvedText and curvedComposable (used to add normal composables to curved layouts)

curvedColumn

fun CurvedScope.curvedColumn(
    modifier: CurvedModifier = CurvedModifier,
    radialDirection: CurvedDirection.Radial? = null,
    angularAlignment: CurvedAlignment.Angular? = null,
    contentBuilder: CurvedScope.() -> Unit
): Unit

A curved layout composable that places its children stacked as part of an arc (the first child will be the outermost). This is similar to a Column layout, but curved into a segment of an annulus.

The thickness of the layout (the difference between the outer and inner radius) will be the sum of the thickness of its children, and the angle taken will be the biggest angle of the children.

Example usage:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.wear.compose.foundation.CurvedAlignment
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.curvedColumn
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.curvedRow
import androidx.wear.compose.foundation.padding
import androidx.wear.compose.foundation.size

CurvedLayout(modifier = Modifier.fillMaxSize()) {
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Red)) }
    curvedColumn(angularAlignment = CurvedAlignment.Angular.End) {
        repeat(3) {
            curvedRow {
                curvedComposable {
                    BasicText(
                        "Row #$it",
                        Modifier.background(Color.White).padding(2.dp),
                        TextStyle(
                            color = Color.Black,
                            fontSize = 14.sp,
                        )
                    )
                }
                curvedComposable {
                    Box(modifier = Modifier.size(10.dp).background(Color.Green))
                }
                curvedComposable {
                    BasicText(
                        "More",
                        Modifier.background(Color.Yellow).padding(2.dp),
                        TextStyle(
                            color = Color.Black,
                            fontSize = 14.sp,
                        )
                    )
                }
            }
        }
    }
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Red)) }
}
Parameters
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved column.
radialDirection: CurvedDirection.Radial? = null

Order to lay out components, outside in or inside out. The default is to inherit from the containing curvedColumn or CurvedLayout
angularAlignment: CurvedAlignment.Angular? = null

Angular alignment specifies where to lay down children that are thinner than the curved column, either at the CurvedAlignment.Angular.Start of the layout, at the CurvedAlignment.Angular.End, or CurvedAlignment.Angular.Center. If unspecified or null, they can choose for themselves.
contentBuilder: CurvedScope.() -> Unit

Scope used to provide the content for this column.

curvedComposable

fun CurvedScope.curvedComposable(
    modifier: CurvedModifier = CurvedModifier,
    radialAlignment: CurvedAlignment.Radial = CurvedAlignment.Radial.Center,
    rotationLocked: Boolean = false,
    content: @Composable BoxScope.() -> Unit
): Unit

Component that allows normal composables to be part of a CurvedLayout.

Parameters
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved composable.
radialAlignment: CurvedAlignment.Radial = CurvedAlignment.Radial.Center

How to align this component if it's thinner than the container.
rotationLocked: Boolean = false

by default (when this is false), the component will be rotated as it moves around the circle, so its base always faces the center. If set to true, it won't be rotated and only moved into position, for example, an upwards pointing arrow will remain pointing upwards wherever it appears on the circle. Note that this is not taken into account when computing the size this will take in the layout, so it's best suited for square/circular things and may require manual sizing when used in other contexts.
content: @Composable BoxScope.() -> Unit

The composable(s) that will be wrapped and laid out as part of the parent container. This has a BoxScope, since it's wrapped inside a Box.

curvedRow

fun CurvedScope.curvedRow(
    modifier: CurvedModifier = CurvedModifier,
    radialAlignment: CurvedAlignment.Radial? = null,
    angularDirection: CurvedDirection.Angular? = null,
    contentBuilder: CurvedScope.() -> Unit
): Unit

A layout composable that places its children in an arc, rotating them as needed. This is similar to a Row layout, but curved into a segment of an annulus.

The thickness of the layout (the difference between the outer and inner radius) will be the same as the thickest child, and the total angle taken is the sum of the children's angles.

Example usage:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.text.BasicText
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.wear.compose.foundation.CurvedAlignment
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.curvedColumn
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.curvedRow
import androidx.wear.compose.foundation.padding
import androidx.wear.compose.foundation.size

CurvedLayout(modifier = Modifier.fillMaxSize()) {
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Red)) }
    curvedColumn(angularAlignment = CurvedAlignment.Angular.End) {
        repeat(3) {
            curvedRow {
                curvedComposable {
                    BasicText(
                        "Row #$it",
                        Modifier.background(Color.White).padding(2.dp),
                        TextStyle(
                            color = Color.Black,
                            fontSize = 14.sp,
                        )
                    )
                }
                curvedComposable {
                    Box(modifier = Modifier.size(10.dp).background(Color.Green))
                }
                curvedComposable {
                    BasicText(
                        "More",
                        Modifier.background(Color.Yellow).padding(2.dp),
                        TextStyle(
                            color = Color.Black,
                            fontSize = 14.sp,
                        )
                    )
                }
            }
        }
    }
    curvedComposable { Box(modifier = Modifier.size(20.dp).background(Color.Red)) }
}
Parameters
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved row.
radialAlignment: CurvedAlignment.Radial? = null

Radial alignment specifies where to lay down children that are thinner than the CurvedRow, either closer to the center CurvedAlignment.Radial.Inner, apart from the center CurvedAlignment.Radial.Outer or in the middle point CurvedAlignment.Radial.Center. If unspecified, they can choose for themselves.
angularDirection: CurvedDirection.Angular? = null

Specify if the children are laid out clockwise or anti-clockwise, and if those needs to be reversed in a Rtl layout. If not specified, it will be inherited from the enclosing curvedRow or CurvedLayout See CurvedDirection.Angular.
contentBuilder: CurvedScope.() -> Unit

Scope used to provide the content for this row.

curvedText

fun CurvedScope.curvedText(
    text: String,
    modifier: CurvedModifier = CurvedModifier,
    background: Color = Color.Unspecified,
    color: Color = Color.Unspecified,
    fontSize: TextUnit = TextUnit.Unspecified,
    fontFamily: FontFamily? = null,
    fontWeight: FontWeight? = null,
    fontStyle: FontStyle? = null,
    fontSynthesis: FontSynthesis? = null,
    style: CurvedTextStyle? = null,
    angularDirection: CurvedDirection.Angular? = null,
    overflow: TextOverflow = TextOverflow.Clip
): Unit

CurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen). CurvedText can be only created within the CurvedLayout to ensure the best experience, like being able to specify to positioning.

The default style uses the LocalTextStyle provided by the MaterialTheme / components, converting it to a CurvedTextStyle. Note that not all parameters are used by curvedText.

If you are setting your own style, you may want to consider first retrieving LocalTextStyle, and using TextStyle.copy to keep any theme defined attributes, only modifying the specific attributes you want to override, then convert to CurvedTextStyle

For ease of use, commonly used parameters from CurvedTextStyle are also present here. The order of precedence is as follows:

  • If a parameter is explicitly set here (i.e, it is not null or TextUnit.Unspecified), then this parameter will always be used.

  • If a parameter is not set, (null or TextUnit.Unspecified), then the corresponding value from style will be used instead.

Additionally, for color, if color is not set, and style does not have a color, then LocalContentColor will be used with an alpha of LocalContentAlpha- this allows this curvedText or element containing this curvedText to adapt to different background colors and still maintain contrast and accessibility.

For samples explicitly specifying style see:

import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.wear.compose.foundation.CurvedAlignment
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.curvedColumn
import androidx.wear.compose.foundation.curvedRow
import androidx.wear.compose.foundation.padding
import androidx.wear.compose.material.curvedText

CurvedLayout() {
    curvedColumn(angularAlignment = CurvedAlignment.Angular.Center) {
        curvedRow {
            curvedText("Red", color = Color.Red)
            curvedText(
                "White On Green",
                color = Color.White,
                background = Color.Green,
                modifier = CurvedModifier.padding(angular = 5.dp)
            )
            curvedText("Big", fontSize = 24.sp)
            curvedText(
                "Extra Bold",
                fontWeight = FontWeight.ExtraBold,
                modifier = CurvedModifier.padding(angular = 5.dp)
            )
        }
        curvedRow {
            curvedText("Default")
            curvedText(
                "Italic",
                fontStyle = FontStyle.Italic,
                modifier = CurvedModifier.padding(angular = 5.dp)
            )
            curvedText("Monospaced", fontFamily = FontFamily.Monospace)
        }
    }
}

For examples using CompositionLocal to specify the style, see:

import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontFamily
import androidx.compose.ui.text.font.FontWeight
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedTextStyle
import androidx.wear.compose.material.LocalContentAlpha
import androidx.wear.compose.material.LocalContentColor
import androidx.wear.compose.material.LocalTextStyle
import androidx.wear.compose.material.ProvideTextStyle
import androidx.wear.compose.material.curvedText

CompositionLocalProvider(
    LocalContentColor provides Color.Cyan,
    LocalContentAlpha provides 0.5f,
    LocalTextStyle provides TextStyle(fontFamily = FontFamily.Serif)
) {
    val greenStyle = LocalTextStyle.current.copy(color = Color.Green)
    CurvedLayout {
        curvedText("Serif Cyan 50%")
        curvedText("Green", style = CurvedTextStyle(greenStyle))
    }
}

ProvideTextStyle(
    value =
        TextStyle(color = Color.Green, background = Color.White, fontWeight = FontWeight.Bold)
) {
    CurvedLayout(anchor = 90f) { curvedText("Green On White") }
}

For more information, see the Curved Text guide.

Parameters
text: String

The text to display
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved text.
background: Color = Color.Unspecified

The background color for the text.
color: Color = Color.Unspecified

Color to apply to the text. If Color.Unspecified, and style has no color set, this will be LocalContentColor.
fontSize: TextUnit = TextUnit.Unspecified

The size of glyphs to use when painting the text. See TextStyle.fontSize.
fontFamily: FontFamily? = null

The font family to be used when rendering the text.
fontWeight: FontWeight? = null

The thickness of the glyphs, in a range of 1, 1000. see FontWeight
fontStyle: FontStyle? = null

The typeface variant to use when drawing the letters (e.g. italic).
fontSynthesis: FontSynthesis? = null

Whether to synthesize font weight and/or style when the requested weight or style cannot be found in the provided font family.
style: CurvedTextStyle? = null

Specifies the style to use.
angularDirection: CurvedDirection.Angular? = null

Specify if the text is laid out clockwise or anti-clockwise, and if those needs to be reversed in a Rtl layout. If not specified, it will be inherited from the enclosing curvedRow or CurvedLayout See CurvedDirection.Angular.
overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.

curvedText

fun CurvedScope.curvedText(
    text: String,
    modifier: CurvedModifier = CurvedModifier,
    maxSweepAngle: Float = CurvedTextDefaults.ScrollableContentMaxSweepAngle,
    background: Color = Color.Unspecified,
    color: Color = Color.Unspecified,
    fontSize: TextUnit = TextUnit.Unspecified,
    fontFamily: FontFamily? = null,
    fontWeight: FontWeight? = null,
    fontStyle: FontStyle? = null,
    fontSynthesis: FontSynthesis? = null,
    style: CurvedTextStyle? = null,
    angularDirection: CurvedDirection.Angular? = null,
    overflow: TextOverflow = TextOverflow.Clip
): Unit

CurvedText is a component allowing developers to easily write curved text following the curvature a circle (usually at the edge of a circular screen). CurvedText can be only created within the CurvedLayout to ensure the best experience, like being able to specify to positioning.

Note that Wear Material UX guidance recommends that curvedText should not exceed the sweep angle CurvedTextDefaults.ScrollableContentMaxSweepAngle on screens with scrollable content such as lists. This limit is enforced by default. For screens without scrollable content, CurvedTextDefaults.StaticContentMaxSweepAngle may be used instead.

The default style uses the LocalTextStyle provided by the MaterialTheme / components, converting it to a CurvedTextStyle. Note that not all parameters are used by curvedText.

If you are setting your own style, you may want to consider first retrieving LocalTextStyle, and using TextStyle.copy to keep any theme defined attributes, only modifying the specific attributes you want to override, then convert to CurvedTextStyle

For ease of use, commonly used parameters from CurvedTextStyle are also present here. The order of precedence is as follows:

  • If a parameter is explicitly set here (i.e, it is not null or TextUnit.Unspecified), then this parameter will always be used.

  • If a parameter is not set, (null or TextUnit.Unspecified), then the corresponding value from style will be used instead.

Additionally, for color, if color is not set, and style does not have a color, then LocalContentColor will be used.

For samples using curved text in a CurvedLayout see:

import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.StrokeCap.Companion.Round
import androidx.compose.ui.unit.dp
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.angularSizeDp
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.curvedBox
import androidx.wear.compose.foundation.curvedRow
import androidx.wear.compose.material3.MaterialTheme
import androidx.wear.compose.material3.curvedText

val backgroundColor = MaterialTheme.colorScheme.onPrimary
val customColor = MaterialTheme.colorScheme.tertiaryDim
CurvedLayout {
    curvedRow(CurvedModifier.background(backgroundColor, Round)) {
        curvedText("Calling", color = customColor)
        curvedBox(CurvedModifier.angularSizeDp(5.dp)) {}
        curvedText("Camilia Garcia")
    }
}
 
import androidx.compose.foundation.layout.size
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Warning
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.StrokeCap.Companion.Round
import androidx.wear.compose.foundation.CurvedDirection
import androidx.wear.compose.foundation.CurvedLayout
import androidx.wear.compose.foundation.CurvedModifier
import androidx.wear.compose.foundation.background
import androidx.wear.compose.foundation.curvedComposable
import androidx.wear.compose.foundation.curvedRow
import androidx.wear.compose.material3.ButtonDefaults
import androidx.wear.compose.material3.Icon
import androidx.wear.compose.material3.MaterialTheme
import androidx.wear.compose.material3.curvedText

val backgroundColor = MaterialTheme.colorScheme.onPrimary
CurvedLayout(anchor = 90f, angularDirection = CurvedDirection.Angular.Reversed) {
    curvedRow(CurvedModifier.background(backgroundColor, Round)) {
        curvedComposable {
            Icon(
                Icons.Filled.Warning,
                contentDescription = "Warning",
                modifier = Modifier.size(ButtonDefaults.IconSize)
            )
        }
        curvedText("Error - network lost")
    }
}

For more information, see the Curved Text guide.

Parameters
text: String

The text to display
modifier: CurvedModifier = CurvedModifier

The CurvedModifier to apply to this curved text.
maxSweepAngle: Float = CurvedTextDefaults.ScrollableContentMaxSweepAngle

The default maximum sweep angle in degrees. For screens without scrollable content, CurvedTextDefaults.StaticContentMaxSweepAngle may be used instead.
background: Color = Color.Unspecified

The background color for the text.
color: Color = Color.Unspecified

Color to apply to the text. If Color.Unspecified, and style has no color set, this will be LocalContentColor.
fontSize: TextUnit = TextUnit.Unspecified

The size of glyphs to use when painting the text. See TextStyle.fontSize.
fontFamily: FontFamily? = null

The font family to be used when rendering the text.
fontWeight: FontWeight? = null

The thickness of the glyphs, in a range of 1, 1000. see FontWeight
fontStyle: FontStyle? = null

The typeface variant to use when drawing the letters (e.g. italic).
fontSynthesis: FontSynthesis? = null

Whether to synthesize font weight and/or style when the requested weight or style cannot be found in the provided font family.
style: CurvedTextStyle? = null

Specifies the style to use.
angularDirection: CurvedDirection.Angular? = null

Specify if the text is laid out clockwise or anti-clockwise, and if those needs to be reversed in a Rtl layout. If not specified, it will be inherited from the enclosing curvedRow or CurvedLayout See CurvedDirection.Angular.
overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.