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immersive scrolling on home feed

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greenart7c3 2023-09-20 18:18:56 -03:00
parent 946723a80e
commit a83b26cc6f
1 changed files with 67 additions and 5 deletions
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72
app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/MainScreen.kt
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@ -15,11 +15,18 @@ import androidx.compose.runtime.State
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Modifier
import androidx.compose.ui.geometry.Offset
import androidx.compose.ui.input.nestedscroll.NestedScrollConnection
import androidx.compose.ui.input.nestedscroll.NestedScrollSource
import androidx.compose.ui.input.nestedscroll.nestedScroll
import androidx.compose.ui.platform.LocalConfiguration
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.dp
import androidx.lifecycle.viewmodel.compose.viewModel
import androidx.navigation.NavBackStackEntry
import androidx.navigation.compose.currentBackStackEntryAsState
@ -180,6 +187,23 @@ fun MainScreen(
}
}
val bottomBarHeight = 50.dp
val bottomBarHeightPx = with(LocalDensity.current) { bottomBarHeight.roundToPx().toFloat() }
val bottomBarOffsetHeightPx = remember { mutableStateOf(0f) }
val nestedScrollConnection = remember {
object : NestedScrollConnection {
override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
val delta = available.y
val newOffset = bottomBarOffsetHeightPx.value + delta
bottomBarOffsetHeightPx.value = newOffset.coerceIn(-bottomBarHeightPx, 0f)
return Offset.Zero
}
}
}
val shouldShow = bottomBarOffsetHeightPx.value == 0f || navState.value?.destination?.route?.startsWith("Home") == false
ModalBottomSheetLayout(
sheetState = sheetState,
sheetContent = {
@ -189,12 +213,34 @@ fun MainScreen(
Scaffold(
modifier = Modifier
.background(MaterialTheme.colors.primaryVariant)
.statusBarsPadding(),
.statusBarsPadding()
.nestedScroll(nestedScrollConnection),
bottomBar = {
AppBottomBar(accountViewModel, navState, navBottomRow)
Crossfade(
targetState = shouldShow,
animationSpec = tween(durationMillis = 100)
) { state ->
if (state) {
AppBottomBar(accountViewModel, navState, navBottomRow)
}
}
},
topBar = {
AppTopBar(followLists, navState, scaffoldState, accountViewModel, nav = nav, navPopBack)
Crossfade(
targetState = shouldShow,
animationSpec = tween(durationMillis = 100)
) { state ->
if (state) {
AppTopBar(
followLists,
navState,
scaffoldState,
accountViewModel,
nav = nav,
navPopBack
)
}
}
},
drawerContent = {
DrawerContent(nav, scaffoldState, sheetState, accountViewModel)
@ -203,11 +249,27 @@ fun MainScreen(
}
},
floatingActionButton = {
FloatingButtons(navState, accountViewModel, accountStateViewModel, nav, navBottomRow)
Crossfade(
targetState = shouldShow,
animationSpec = tween(durationMillis = 100)
) { state ->
if (state) {
FloatingButtons(
navState,
accountViewModel,
accountStateViewModel,
nav,
navBottomRow
)
}
}
},
scaffoldState = scaffoldState
) {
Column(modifier = Modifier.padding(bottom = it.calculateBottomPadding())) {
Column(
modifier = Modifier
.padding(bottom = if (bottomBarOffsetHeightPx.value == 0f || navState.value?.destination?.route != Route.Home.base) it.calculateBottomPadding() else 0.dp)
) {
AppNavigation(
homeFeedViewModel = homeFeedViewModel,
repliesFeedViewModel = repliesFeedViewModel,