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KatieBarnett/Scaffold.kt Secret

Created December 12, 2022 21:49
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Setting element colour for top app bar with derived state of
Raw
Scaffold.kt
...
val scrollBehavior = TopAppBarDefaults.enterAlwaysScrollBehavior(rememberTopAppBarState())
val isCollapsed = remember { derivedStateOf { scrollBehavior.state.collapsedFraction > 0.5 } }
val topAppBarElementColor = if (isCollapsed) {
MaterialTheme.colorScheme.onSurface
} else {
MaterialTheme.colorScheme.onPrimary
}
...
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