Note
No longer active!
After internal experimentation and discussion, we've decided to move forward with other options.
class Counter : ComposableModel<Int, CounterEvent>(0) {
private fun increment() {
withState {
setState(state.value + 1)
}
}
private fun decrement() {
withState {
setState(state.value - 1)
}
}
override fun on(event: CounterEvent) = when (event) {
Increment -> increment()
Decrement -> decrement()
}
}@SerializableComponentBox
fun main() = componentBox {
tree {
lazyColumn<CounterEvent>(
verticalArrangement = Arrangement.SpaceEvenly(2.dp),
horizontalAlignment = Alignment.Start
) {
child(header)
child(count)
child(incrementButton)
child(decrementButton)
}
}
}
val header = text(
text = "Component Box Counter",
style = TextStyle(fontWeight = FontWeight.ExtraBold)
)
val count = text(
text = "Count: \${COUNTER_STATE}",
style = TextStyle(color = Color.Hex("#FF0000"))
)
val incrementButton = textButton(
text = "+1",
onClick = semantic { Increment }
)
val decrementButton = textButton(
text = "-1",
onClick = semantic { Decrement }
)@Composable
@ComponentBoxExport
fun main() = statefulComponentBoxGraph(init = null) {
Graph(start = CounterOnboardingFlow.value) {
componentBox(CounterLoginScreen.value, LoginScreen())
componentBox(CounterOnboardingFlow.value, OnboardingFlow())
componentBox(CounterScreen.Home.value, HomeScreen())
}
}@Composable
fun LoginScreen() = Forest {
tree("heading", Tree { LoginHeading() })
tree("button", Tree { LoginButton() })
}@Composable
fun OnboardingFlow() = Trail {
node(WelcomeScreen())
node(FeatureDiscoveryScreen())
node(HomeScreen())
}@Composable
fun HomeScreen() = ComponentBox {
Tree {
LazyColumn(
verticalArrangement = Arrangement.SpaceEvenly(2.dp),
horizontalAlignment = Alignment.Start
) {
child(header)
child(Count())
child(IncrementButton())
child(DecrementButton())
}
}
}
@Composable
fun IncrementButton() = StatefulComposable<Counter> {
ContainedButton(onClick = lambda { it.on(Increment) }) {
text(text = "+1")
}
}
@Composable
fun DecrementButton() = StatefulComposable<Counter> {
ContainedButton(onClick = lambda { it.on(Decrement) }) {
text(text = "-1")
}
}
@Composable
fun Count() = StatefulComposable<Counter> {
text(
text = "Count: ${it.state.value}",
style = TextStyle(color = Color.Hex("#FF0000"))
)
}
./gradlew componentBoxJs./gradlew componentBoxJsonclass ComponentBoxActivity : ComponentActivity() {
private val scope = CoroutineScope(Dispatchers.Default)
private val service = ComponentBoxService(scope)
private val componentBox = service.componentBox
private val render = RenderingEngine()
override fun onStart() {
super.onStart()
service.launch(MANIFEST_URL)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
val root = componentBox.collectAsState()
render {
root.value
}
}
}
}@Composable
fun ComponentBoxView(componentBox: StateFlow<Component?>, render: RenderingEngine) {
val root = componentBox.collectAsState()
render {
root.value
}
}export default function ComponentBoxView(props: {manifestUrl: string}) {
const [root, setRoot] = useState<Component | null>(null);
const service = new ComponentBoxService();
const render = new RenderingEngine();
useEffect(() => {
async function launch(manifestUrl: string): Tree {
const componentBox = await service.launch(manifestUrl)
setRoot(componentBox.root)
}
launch(props.manifestUrl)
}, [props.manifestUrl]);
return render(root)
}struct ComponentBoxView: View {
@StateObject private var service = ComponentBoxService()
@State private var root: Component?
var body: some View {
render {
root
}
.onAppear {
service.launch(from: MANIFEST_URL) { result in
switch result {
case .success(let componentBox):
DispatchQueue.main.async {
self.root = componentBox.root
}
}
}
}
}
Snapshots are available in Sonatype's snapshots repository.
Copyright (c) 2023 Dropbox, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
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