# 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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```
public 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 methods |
|---|---|
| `abstract void` | `@https://developer.android.com/reference/androidx/annotation/MainThread https://developer.android.com/reference/androidx/pdf/view/PdfView.OnGestureStateChangedListener#onGestureStateChanged(kotlin.Int)(int newState)` Callback when the PdfView starts and stops being affected by an external input like user touch. |

## Public methods

### onGestureStateChanged

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

```
@MainThread
abstract void onGestureStateChanged(int newState)
```

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