---
title: "PositionIndicatorState"
description: "An object representing the relative position of a scrollbar or rolling side button or rotating
bezel position. This interface is implemented by classes that adapt other state information such
as [ScalingLazyListState] or [ScrollState] of scrollable containers or to represent the position
of say a volume control that can be 'ticked' using a rolling side button or rotating bezel.

Implementing classes provide [positionFraction] to determine where in the range [0..1] that the
indicator should be displayed and [sizeFraction] to determine the size of the indicator in the
range [0..1]. E.g. If a [ScalingLazyListState] had 50 items and the last 5 were visible it would
have a position of 1.0f to show that the scroll is positioned at the end of the list and a size
of 5 / 50 = 0.1f to indicate that 10% of the visible items are currently visible."
type: "interface"
---

<div class='type'>Interface</div>


<a id='references'></a>

<div class='sourceset sourceset-android'>Android</div>



```kotlin
public interface PositionIndicatorState
```


An object representing the relative position of a scrollbar or rolling side button or rotating
bezel position. This interface is implemented by classes that adapt other state information such
as `ScalingLazyListState` or `ScrollState` of scrollable containers or to represent the position
of say a volume control that can be 'ticked' using a rolling side button or rotating bezel.

Implementing classes provide `positionFraction` to determine where in the range `0..1` that the
indicator should be displayed and `sizeFraction` to determine the size of the indicator in the
range `0..1`. E.g. If a `ScalingLazyListState` had 50 items and the last 5 were visible it would
have a position of 1.0f to show that the scroll is positioned at the end of the list and a size
of 5 / 50 = 0.1f to indicate that 10% of the visible items are currently visible.


## Functions

```kotlin
@FloatRange(from = 0.0, to = 1.0)
    public fun sizeFraction(@FloatRange(from = 0.0) scrollableContainerSizePx: Float): Float
```


Size of the indicator in the range `0f,1f`. 1f means it takes the whole space.

#### Parameters

| | |
| --- | --- |
| scrollableContainerSizePx | the height or width of the container in pixels depending on orientation of the indicator, (height for vertical, width for horizontal) |



```kotlin
public fun visibility(
        @FloatRange(from = 0.0) scrollableContainerSizePx: Float
    ): PositionIndicatorVisibility
```


Should we show the Position Indicator

#### Parameters

| | |
| --- | --- |
| scrollableContainerSizePx | the height or width of the container in pixels depending on orientation of the indicator, (height for vertical, width for horizontal) |