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>
This commit is contained in:
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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45
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.TopAppBar
import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.runtime.collectAsState
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.platform.setContent
@ -31,27 +34,31 @@ class MainActivity : AppCompatActivity() {
super.onCreate(savedInstanceState)
setContent {
TodoTheme {
TodoApp()
val coroutineScope = rememberCoroutineScope()
val itemsDao = Graph.database.todoItemsDao()
TodoApp(
itemsDao.getAllItems().collectAsState(initial = emptyList()),
{ item -> coroutineScope.launch { itemsDao.insert(item) } },
{ item -> coroutineScope.launch { itemsDao.delete(item) } },
)
}
}
}
}
@Composable
fun TodoApp() {
val coroutineScope = rememberCoroutineScope()
val itemsDao = Graph.database.todoItemsDao()
val items by itemsDao.getAllItems().collectAsState(initial = emptyList())
fun TodoApp(
items: State<List<TodoItem>>,
onAdd: (item: TodoItem) -> Unit,
onDelete: (item: TodoItem) -> Unit,
) {
val realItems by items
Scaffold(
topBar = { TopAppBar({ Text(text = "I can Compose?") }) },
floatingActionButton = {
FloatingActionButton(
onClick = {
coroutineScope.launch {
itemsDao.insert(TodoItem("Item ${items.size + 1}"))
}
},
onClick = { onAdd.invoke(TodoItem("Item ${realItems.size + 1}")) },
elevation = 8.dp,
modifier = Modifier.semantics { testTag = "fab" }
) {
@ -62,12 +69,11 @@ fun TodoApp() {
}
},
bodyContent = {
LazyColumnFor(items = items, modifier = Modifier.padding(horizontal = 16.dp)) { todoItem ->
TodoRowItem(item = todoItem) {
coroutineScope.launch {
itemsDao.delete(todoItem)
}
}
LazyColumnFor(
items = realItems,
modifier = Modifier.padding(horizontal = 16.dp)
) { todoItem ->
TodoRowItem(item = todoItem) { onDelete.invoke(todoItem) }
}
},
)
@ -77,6 +83,11 @@ fun TodoApp() {
@Composable
fun PreviewApp() {
TodoTheme {
TodoApp()
val items = remember { mutableStateOf(listOf(TodoItem("Item 1"))) }
TodoApp(
items,
{},
{},
)
}
}