# PdfView.OnGestureStateChangedListener

Artifact: [androidx.pdf:pdf-viewer](https://developer.android.com/jetpack/androidx/releases/pdf) [View Source](https://cs.android.com/search?q=file:androidx/pdf/view/PdfView.kt+class:androidx.pdf.view.PdfView.OnGestureStateChangedListener) Added in [1.0.0-beta01](https://developer.android.com/jetpack/androidx/releases/pdf#1.0.0-beta01)

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```
interface PdfView.OnGestureStateChangedListener
```

<br />

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Listener interface to receive callbacks when the PdfView starts and stops being affected by an external input like user touch.

## Summary

| ### Public functions |
|---|---|
| `https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html` | `@https://developer.android.com/reference/kotlin/androidx/annotation/MainThread https://developer.android.com/reference/kotlin/androidx/pdf/view/PdfView.OnGestureStateChangedListener#onGestureStateChanged(kotlin.Int)(newState: https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html)` Callback when the PdfView starts and stops being affected by an external input like user touch. |

## Public functions

### onGestureStateChanged

Added in [1.0.0-beta01](https://developer.android.com/jetpack/androidx/releases/pdf#1.0.0-beta01)

```
@MainThread
fun onGestureStateChanged(newState: Int): Unit
```

Callback when the PdfView starts and stops being affected by an external input like user touch. `https://developer.android.com/reference/kotlin/androidx/pdf/view/PdfView.OnGestureStateChangedListener#onGestureStateChanged(kotlin.Int)` will be one of `https://developer.android.com/reference/kotlin/androidx/pdf/view/PdfView#GESTURE_STATE_IDLE()`, `https://developer.android.com/reference/kotlin/androidx/pdf/view/PdfView#GESTURE_STATE_INTERACTING()`, or `https://developer.android.com/reference/kotlin/androidx/pdf/view/PdfView#GESTURE_STATE_SETTLING()`