Focus Ring

A modifier that draws an outline around a composable's bounds when the component is focused, similar to browser focus indicators.

The focusRing is based on the outline modifier and does not affect layout or size - it draws purely outside the composable's bounds and only appears when focused.

Code Examples

Basic Example

Focus ring requires an interactionSource, width and color to render a focus indicator around the component.

The shape parameter should match the shape of the composable you are styling for proper alignment.

val interactionSource = remember { MutableInteractionSource() }

SimpleButton(
    modifier = Modifier.focusRing(
        interactionSource = interactionSource,
        width = 2.dp,
        color = Color(0xFF3B82F6),
        shape = RoundedCornerShape(8.dp),
        offset = 2.dp
    ),
    interactionSource = interactionSource
)

Customizing Width

You can customize the thickness of the focus ring by adjusting the width parameter.

val interactionSource = remember { MutableInteractionSource() }

SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 1.dp, Color(0xFF3B82F6), shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)
SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)
SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 4.dp, Color(0xFF3B82F6), shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)

Customizing Shape

The focus ring adapts to different shapes. The shape parameter should match the shape of your composable for proper alignment.

Note that generic shapes are not supported and will fail silently.

val interactionSource = remember { MutableInteractionSource() }

SimpleButton(
    shape = RectangleShape,
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), shape = RectangleShape),
    interactionSource = interactionSource
)
SimpleButton(
    shape = RoundedCornerShape(8.dp),
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)
SimpleButton(
    shape = RoundedCornerShape(100),
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), shape = RoundedCornerShape(100)),
    interactionSource = interactionSource
)

Customizing Offset

The offset parameter controls the distance between the composable and its focus ring, creating a gap effect.

val interactionSource = remember { MutableInteractionSource() }

SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), offset = 0.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)
SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), offset = 4.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)
SimpleButton(
    modifier = Modifier.focusRing(interactionSource, 2.dp, Color(0xFF3B82F6), offset = 8.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = interactionSource
)

Customizing Color

You can customize the focus ring color to match your design system or create visual emphasis.

val redInteractionSource = remember { MutableInteractionSource() }
val greenInteractionSource = remember { MutableInteractionSource() }
val purpleInteractionSource = remember { MutableInteractionSource() }

SimpleButton(
    modifier = Modifier.focusRing(redInteractionSource, 2.dp, Color(0xFFEF4444), offset = 2.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = redInteractionSource
)
SimpleButton(
    modifier = Modifier.focusRing(greenInteractionSource, 2.dp, Color(0xFF10B981), offset = 2.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = greenInteractionSource
)
SimpleButton(
    modifier = Modifier.focusRing(purpleInteractionSource, 2.dp, Color(0xFF8B5CF6), offset = 2.dp, shape = RoundedCornerShape(8.dp)),
    interactionSource = purpleInteractionSource
)