Common
```kotlin
@ExperimentalMaterial3AdaptiveApi
class ThreePaneScaffoldValue
internal constructor(
val primary: PaneAdaptedValue,
val secondary: PaneAdaptedValue,
val tertiary: PaneAdaptedValue,
internal val currentDestination: ThreePaneScaffoldRole?,
) : PaneScaffoldValue, PaneExpansionStateKeyProvider
```
The adapted value of `ThreePaneScaffold`. It contains each pane's adapted value.
`ThreePaneScaffold` will use the adapted values to decide which panes should be displayed and how
they should be displayed. With other input parameters of `ThreePaneScaffold` fixed, each possible
instance of this class should represent a unique state of `ThreePaneScaffold` and developers can
compare two [ThreePaneScaffoldValue](/jetpack-compose/androidx.compose.material3.adaptive/adaptive-layout/classes/ThreePaneScaffoldValue) to decide if there is a layout structure change.
For a Material-opinionated layout, it's suggested to use [calculateThreePaneScaffoldValue](/jetpack-compose/androidx.compose.material3.adaptive/adaptive-layout/functions/calculateThreePaneScaffoldValue) to
calculate the current scaffold value.
#### Parameters
| | |
| --- | --- |
| primary | [PaneAdaptedValue](/jetpack-compose/androidx.compose.material3.adaptive/adaptive-layout/interfaces/PaneAdaptedValue) of the primary pane of `ThreePaneScaffold` |
| secondary | [PaneAdaptedValue](/jetpack-compose/androidx.compose.material3.adaptive/adaptive-layout/interfaces/PaneAdaptedValue) of the secondary pane of `ThreePaneScaffold` |
| tertiary | [PaneAdaptedValue](/jetpack-compose/androidx.compose.material3.adaptive/adaptive-layout/interfaces/PaneAdaptedValue) of the tertiary pane of `ThreePaneScaffold` |
## Secondary Constructors
```kotlin
constructor(
primary: PaneAdaptedValue,
secondary: PaneAdaptedValue,
tertiary: PaneAdaptedValue,
) : this(
primary = primary,
secondary = secondary,
tertiary = tertiary,
currentDestination = null,
)
```