Created
December 18, 2021 20:31
-
-
Save wispborne/f6a93da798da26887cc88ef16aab20da to your computer and use it in GitHub Desktop.
Toaster, a Jetbrains Compose Desktop composable to displayed stacked toast notifications with an optional timer
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| package smol_app | |
| import androidx.compose.foundation.layout.Arrangement | |
| import androidx.compose.foundation.lazy.LazyColumn | |
| import androidx.compose.foundation.lazy.LazyRow | |
| import androidx.compose.foundation.lazy.items | |
| import androidx.compose.runtime.Composable | |
| import androidx.compose.runtime.LaunchedEffect | |
| import androidx.compose.runtime.currentRecomposeScope | |
| import androidx.compose.runtime.rememberCoroutineScope | |
| import androidx.compose.ui.Modifier | |
| import kotlinx.coroutines.delay | |
| import kotlinx.coroutines.launch | |
| import smol_app.Toaster.defaultTimeoutMillis | |
| object Toaster { | |
| val defaultTimeoutMillis = 10000L | |
| } | |
| @Composable | |
| fun toaster( | |
| modifier: Modifier = Modifier, | |
| toasterState: ToasterState, | |
| items: List<Toast>, | |
| verticalArrangement: Arrangement.Vertical? = Arrangement.Top, | |
| horizontalArrangement: Arrangement.Horizontal? = null | |
| ) { | |
| val scope = rememberCoroutineScope() | |
| val recomposeScope = currentRecomposeScope | |
| toasterState.items = items | |
| .filter { (toasterState.timersByToastId[it.id] ?: 1) > 0 } | |
| .toMutableList() | |
| toasterState.items.forEach { | |
| if (it.timeoutMillis != null && !toasterState.timersByToastId.containsKey(it.id)) { | |
| toasterState.timersByToastId[it.id] = it.timeoutMillis | |
| } | |
| } | |
| LaunchedEffect(Unit) { | |
| scope.launch { | |
| while (true) { | |
| toasterState.items.toList().forEach { | |
| if (toasterState.timersByToastId.containsKey(it.id)) { | |
| toasterState.timersByToastId[it.id] = toasterState.timersByToastId[it.id]!! - 100 | |
| } | |
| } | |
| val preFilterSize = toasterState.items.size | |
| toasterState.items = toasterState.items.filter { (toasterState.timersByToastId[it.id] ?: 1) > 0 } | |
| if (preFilterSize != toasterState.items.size) { | |
| recomposeScope.invalidate() | |
| } | |
| delay(100) | |
| } | |
| } | |
| } | |
| if (horizontalArrangement != null) { | |
| LazyRow(modifier, horizontalArrangement = horizontalArrangement) { | |
| items(toasterState.items) { | |
| if ((it.timeoutMillis ?: 1) > 0) { | |
| it.content() | |
| } | |
| } | |
| } | |
| } else if (verticalArrangement != null) { | |
| LazyColumn(modifier, verticalArrangement = verticalArrangement) { | |
| items(toasterState.items) { | |
| if ((it.timeoutMillis ?: 1) > 0) { | |
| it.content() | |
| } | |
| } | |
| } | |
| } | |
| } | |
| class ToasterState { | |
| var items: List<Toast> = emptyList() | |
| val timersByToastId = mutableMapOf<String, Long>() | |
| } | |
| data class Toast( | |
| val id: String, | |
| val timeoutMillis: Long? = defaultTimeoutMillis, | |
| val content: @Composable () -> Unit | |
| ) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| val toasterState = remember { ToasterState() } | |
| toaster( | |
| modifier = Modifier.align(Alignment.BottomEnd).padding(8.dp), | |
| toasterState = toasterState, | |
| items = someItems.map { | |
| Toast(id = it.id, timeoutMillis = null) { Text(it.text) } | |
| }, | |
| horizontalArrangement = Arrangement.spacedBy(8.dp) | |
| ) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment