Keep the map loaded behind other screens

Leaving Home used to tear down the map's surface, so coming back showed black for a second or two while the nav app redrew. Home now stays composed under every other screen.
This commit is contained in:
Seb3thehacker committed 2026-09-30 13:17:37 -07:00
1 parent 473c12ad8f
commit f25eafcc48
1 file changed
+27 -12
@@ -18,6 +18,7 @@ import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.foundation.background
import androidx.compose.foundation.gestures.detectTapGestures
import androidx.compose.ui.graphics.lerp
import androidx.compose.ui.graphics.Brush
import androidx.compose.foundation.layout.widthIn
@@ -176,18 +177,32 @@ fun CarUi() {
// Header navigation (breadcrumb trail) - off for now, kept to tweak later.
// BreadcrumbBar(navigator)
Box(Modifier.weight(1f).fillMaxWidth()) {
when (screen) {
CarScreen.Home -> CarHome()
CarScreen.Apps -> CarLauncher()
CarScreen.Media -> mediaApp?.let { MediaScreen(it) { navigator.back() } }
CarScreen.Browse -> BrowseAppScreen(navigator)
CarScreen.Settings -> CarSettingsScreen()
CarScreen.Dashboard -> CarDashboardScreen()
CarScreen.Weather -> WeatherScreen()
CarScreen.VehicleData -> VehicleDataScreen()
is CarScreen.Notifications -> NotificationsScreen(screen.replyTo)
is CarScreen.Messages -> MessagesScreen(screen.packageName)
is CarScreen.App -> CarApps.find(screen.id)?.content?.invoke()
// Home never leaves the composition; other screens cover it. Dropping it
// would tear down the map's surface, and coming back would then show black
// while the nav app redrew on a new one.
CarHome()
if (screen != CarScreen.Home) {
Box(
Modifier
.fillMaxSize()
.background(MaterialTheme.colorScheme.background)
// Keeps touches that miss this screen's controls off the map.
.pointerInput(Unit) { detectTapGestures { } },
) {
when (screen) {
CarScreen.Home -> Unit
CarScreen.Apps -> CarLauncher()
CarScreen.Media -> mediaApp?.let { MediaScreen(it) { navigator.back() } }
CarScreen.Browse -> BrowseAppScreen(navigator)
CarScreen.Settings -> CarSettingsScreen()
CarScreen.Dashboard -> CarDashboardScreen()
CarScreen.Weather -> WeatherScreen()
CarScreen.VehicleData -> VehicleDataScreen()
is CarScreen.Notifications -> NotificationsScreen(screen.replyTo)
is CarScreen.Messages -> MessagesScreen(screen.packageName)
is CarScreen.App -> CarApps.find(screen.id)?.content?.invoke()
}
}
}
// The dashboard is already listing them, so it needs no popup.
if (screen !is CarScreen.Notifications && screen != CarScreen.Dashboard) {