---
title: "TrackpadButton"
description: "Representation of a trackpad button with its associated [ID][buttonId] for the current platform."
type: "class"
---
Class
Common
```kotlin
expect value class TrackpadButton(val buttonId: Int)
```
Representation of a trackpad button with its associated `ID` for the current platform.
## Companion Object
#### Properties
Common
```kotlin
val Primary: TrackpadButton
```
The primary trackpad button. Typically the left trackpad button.
Common
```kotlin
val Secondary: TrackpadButton
```
The secondary trackpad button. Typically the right trackpad button.
Common
```kotlin
val Tertiary: TrackpadButton
```
The tertiary trackpad button. Typically the middle trackpad button.
Android
```kotlin
actual value class TrackpadButton(val buttonId: Int)
```
## Companion Object
#### Properties
Android
```kotlin
actual val Primary = TrackpadButton(MotionEvent.BUTTON_PRIMARY)
```
The left trackpad button
Android
```kotlin
actual val Secondary = TrackpadButton(MotionEvent.BUTTON_SECONDARY)
```
The right trackpad button
Android
```kotlin
actual val Tertiary = TrackpadButton(MotionEvent.BUTTON_TERTIARY)
```
The middle trackpad button