---
title: "PagerSnapDistance"
description: "[PagerSnapDistance] defines the way the [Pager] will treat the distance between the current page
and the page where it will settle."
type: "interface"
---

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


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

<div class='sourceset sourceset-common'>Common</div>



```kotlin
interface PagerSnapDistance
```


`PagerSnapDistance` defines the way the `Pager` will treat the distance between the current page
and the page where it will settle.


## Functions

```kotlin
fun calculateTargetPage(
        startPage: Int,
        suggestedTargetPage: Int,
        velocity: Float,
        pageSize: Int,
        pageSpacing: Int,
    ): Int
```


Provides a chance to change where the `Pager` fling will settle.

#### Parameters

| | |
| --- | --- |
| startPage | The current page right before the fling starts. |
| suggestedTargetPage | The proposed target page where this fling will stop. This target will be the page that will be correctly positioned (snapped) after naturally decaying with `velocity` using a `DecayAnimationSpec`. |
| velocity | The initial fling velocity. |
| pageSize | The page size for this `Pager` in pixels. |
| pageSpacing | The spacing used between pages in pixels. |


#### Returns

| | |
| --- | --- |
|  | An updated target page where to settle. Note that this value needs to be between 0 and the total count of pages in this pager. If an invalid value is passed, the pager will coerce within the valid values. |