To implement focus highlighting in Jetpack Compose, you can use the `Modifier.focusRequester` and `Modifier.focusModifier` functions. Here's a basic example of how to do it:
1. Define a `FocusRequester`:
```kotlin
val focusRequester = remember { FocusRequester() }
```
2. Apply the `Modifier.focusRequester` to the composable that should receive focus:
```kotlin
YourComposable(
modifier = Modifier
.clickable { /* Handle click event */ }
.focusRequester(focusRequester)
)
```
3. Define a composable that represents the focus highlight:
```kotlin
val focusModifier = Modifier
.border(2.dp, Color.Blue)
.padding(4.dp)
```
4. Apply the `Modifier.focusModifier` to the composable that should display the focus highlight:
```kotlin
YourComposable(
modifier = Modifier
.focusModifier(focusRequester, focusModifier)
)
```
Now, when the composable is clicked, it will request focus, and the composable with `focusModifier` will display a blue border to indicate focus. You can customize the appearance of the focus highlight by adjusting the `focusModifier` as needed.
This is a basic example, and you can further customize it based on your specific UI requirements.