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Merge "Move page count to rememberPagerState" into udc-qpr-dev

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This commit is contained in:
Anvesh Renikindi
2023-06-22 18:51:52 +00:00
committed by Android (Google) Code Review
parent 0870eea43f 7b1df82eec
commit fc73861b8f
1 changed files with 2 additions and 48 deletions
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50
packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/SettingsPager.kt
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@@ -20,20 +20,12 @@ import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.pager.HorizontalPager
import androidx.compose.foundation.pager.PagerState
import androidx.compose.foundation.pager.rememberPagerState
import androidx.compose.material3.TabRow
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.SideEffect
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalConfiguration
import com.android.settingslib.spa.framework.theme.SettingsDimension
import kotlin.math.absoluteValue
import kotlinx.coroutines.launch
@@ -49,7 +41,7 @@ fun SettingsPager(titles: List<String>, content: @Composable (page: Int) -> Unit
Column {
val coroutineScope = rememberCoroutineScope()
val pagerState = rememberPageStateFixed()
val pagerState = rememberPagerState { titles.size }
TabRow(
selectedTabIndex = pagerState.currentPage,
@@ -72,46 +64,8 @@ fun SettingsPager(titles: List<String>, content: @Composable (page: Int) -> Unit
}
}
HorizontalPager(pageCount = titles.size, state = pagerState) { page ->
HorizontalPager(state = pagerState) { page ->
content(page)
}
}
}
/**
* Gets the state of [PagerState].
*
* This is a work around.
*
* TODO: Remove this and replace with rememberPageState() after the Compose Foundation 1.5.0-alpha04
* updated in the platform.
*/
@Composable
@OptIn(ExperimentalFoundationApi::class)
private fun rememberPageStateFixed(): PagerState {
var currentPage by rememberSaveable { mutableStateOf(0) }
var targetPage by rememberSaveable { mutableStateOf(-1) }
val pagerState = rememberPagerState()
val configuration = LocalConfiguration.current
var lastScreenWidthDp by rememberSaveable { mutableStateOf(-1) }
val screenWidthDp = configuration.screenWidthDp
LaunchedEffect(screenWidthDp) {
// Reset pager state to fix an issue after configuration change.
// When we declare android:configChanges in the manifest, the pager state is in a weird
// state after configuration change.
targetPage = currentPage
lastScreenWidthDp = screenWidthDp
}
LaunchedEffect(targetPage) {
if (targetPage != -1) {
pagerState.scrollToPage(targetPage)
targetPage = -1
}
}
SideEffect {
if (lastScreenWidthDp == screenWidthDp) {
currentPage = pagerState.currentPage
}
}
return pagerState
}