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Scrolling to first item of the selected users list after adding a user

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This commit is contained in:
Maxime NATUREL 2023-03-16 15:43:06 +01:00 • committed by Florian Renaud
parent ddcde735fe
commit 9188408160
4 changed files with 30 additions and 1 deletions
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17
features/selectusers/impl/src/main/kotlin/io/element/android/features/selectusers/impl/DefaultSelectUsersPresenter.kt
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@ -16,12 +16,15 @@
package io.element.android.features.selectusers.impl
import androidx.compose.foundation.lazy.LazyListState
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.MutableState
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import io.element.android.features.selectusers.api.SelectUsersEvents
@ -36,15 +39,19 @@ import kotlinx.collections.immutable.persistentListOf
import kotlinx.collections.immutable.persistentSetOf
import kotlinx.collections.immutable.toImmutableList
import kotlinx.collections.immutable.toImmutableSet
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.launch
class DefaultSelectUsersPresenter(private val isMultiSelectionEnabled: Boolean) : SelectUsersPresenter {
@Composable
override fun present(): SelectUsersState {
val localCoroutineScope = rememberCoroutineScope()
var isSearchActive by rememberSaveable { mutableStateOf(false) }
val selectedUsers: MutableState<ImmutableSet<MatrixUser>> = remember {
mutableStateOf(persistentSetOf())
}
val selectedUsersListState = rememberLazyListState()
var searchQuery by rememberSaveable { mutableStateOf("") }
val searchResults: MutableState<ImmutableList<MatrixUser>> = remember {
mutableStateOf(persistentListOf())
@ -54,7 +61,10 @@ class DefaultSelectUsersPresenter(private val isMultiSelectionEnabled: Boolean)
when (event) {
is SelectUsersEvents.OnSearchActiveChanged -> isSearchActive = event.active
is SelectUsersEvents.UpdateSearchQuery -> searchQuery = event.query
is SelectUsersEvents.AddToSelection -> selectedUsers.value = selectedUsers.value.plus(event.matrixUser).toImmutableSet()
is SelectUsersEvents.AddToSelection -> {
selectedUsers.value = selectedUsers.value.plus(event.matrixUser).toImmutableSet()
localCoroutineScope.scrollToFirstSelectedUser(selectedUsersListState)
}
is SelectUsersEvents.RemoveFromSelection -> selectedUsers.value = selectedUsers.value.minus(event.matrixUser).toImmutableSet()
}
}
@ -76,6 +86,7 @@ class DefaultSelectUsersPresenter(private val isMultiSelectionEnabled: Boolean)
searchQuery = searchQuery,
searchResults = searchResults.value,
selectedUsers = selectedUsers.value.reversed().toImmutableSet(),
selectedUsersListState = selectedUsersListState,
isSearchActive = isSearchActive,
isMultiSelectionEnabled = isMultiSelectionEnabled,
eventSink = ::handleEvents,
@ -92,4 +103,8 @@ class DefaultSelectUsersPresenter(private val isMultiSelectionEnabled: Boolean)
}
return results.toImmutableList()
}
private fun CoroutineScope.scrollToFirstSelectedUser(listState: LazyListState) = launch {
listState.scrollToItem(index = 0)
}
}