msfjarvis/compose-lobsters
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Separate out item loading to enable host previews again

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Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
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Harsh Shandilya 2020-08-30 16:38:55 +05:30
parent 778faf2950
commit 0c3b1d388f
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GPG key ID: 366D7BBAD1031E80
1 changed files with 28 additions and 17 deletions
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53
app/src/main/java/dev/msfjarvis/todo/MainActivity.kt
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@ -10,8 +10,11 @@ import androidx.compose.material.MaterialTheme
import androidx.compose.material.Scaffold import androidx.compose.material.Scaffold
import androidx.compose.material.TopAppBar import androidx.compose.material.TopAppBar
import androidx.compose.runtime.Composable import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.runtime.collectAsState import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Modifier import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.setContent import androidx.compose.ui.platform.setContent
@ -31,27 +34,31 @@ class MainActivity : AppCompatActivity() {
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
setContent { setContent {
TodoTheme { TodoTheme {
TodoApp()
}
}
}
}
@Composable
fun TodoApp() {
val coroutineScope = rememberCoroutineScope() val coroutineScope = rememberCoroutineScope()
val itemsDao = Graph.database.todoItemsDao() val itemsDao = Graph.database.todoItemsDao()
val items by itemsDao.getAllItems().collectAsState(initial = emptyList()) TodoApp(
itemsDao.getAllItems().collectAsState(initial = emptyList()),
{ item -> coroutineScope.launch { itemsDao.insert(item) } },
{ item -> coroutineScope.launch { itemsDao.delete(item) } },
)
}
}
}
}
@Composable
fun TodoApp(
items: State<List<TodoItem>>,
onAdd: (item: TodoItem) -> Unit,
onDelete: (item: TodoItem) -> Unit,
) {
val realItems by items
Scaffold( Scaffold(
topBar = { TopAppBar({ Text(text = "I can Compose?") }) }, topBar = { TopAppBar({ Text(text = "I can Compose?") }) },
floatingActionButton = { floatingActionButton = {
FloatingActionButton( FloatingActionButton(
onClick = { onClick = { onAdd.invoke(TodoItem("Item ${realItems.size + 1}")) },
coroutineScope.launch {
itemsDao.insert(TodoItem("Item ${items.size + 1}"))
}
},
elevation = 8.dp, elevation = 8.dp,
modifier = Modifier.semantics { testTag = "fab" } modifier = Modifier.semantics { testTag = "fab" }
) { ) {
@ -62,12 +69,11 @@ fun TodoApp() {
} }
}, },
bodyContent = { bodyContent = {
LazyColumnFor(items = items, modifier = Modifier.padding(horizontal = 16.dp)) { todoItem -> LazyColumnFor(
TodoRowItem(item = todoItem) { items = realItems,
coroutineScope.launch { modifier = Modifier.padding(horizontal = 16.dp)
itemsDao.delete(todoItem) ) { todoItem ->
} TodoRowItem(item = todoItem) { onDelete.invoke(todoItem) }
}
} }
}, },
) )
@ -77,6 +83,11 @@ fun TodoApp() {
@Composable @Composable
fun PreviewApp() { fun PreviewApp() {
TodoTheme { TodoTheme {
TodoApp() val items = remember { mutableStateOf(listOf(TodoItem("Item 1"))) }
TodoApp(
items,
{},
{},
)
} }
} }