Screen Model and ViewModel

Modo provides support for Android ViewModel and also includes its own ScreenModel.

ScreenModel

ScreenModel is similar to ViewModel. It is an interface that has an onDispose function, which is called when the ScreenModel needs to be cleared.

To use it inside a screen, call rememberScreenModel inside the Content function:

@Parcelize
class ScreenModelSampleScreen(
    override val screenKey: ScreenKey = generateScreenKey()
) : Screen {

    @Composable
    override fun Content(modifier: Modifier) {
        val screenModel = rememberScreenModel {
            SampleScreenModel()
        }
        Column(Modifier.fillMaxSize()) {
            Text(text = screenModel.state.intValue.toString())
        }
    }

}

private class SampleScreenModel : ScreenModel {

    val state = mutableIntStateOf(0)

    init {
        coroutineScope.launch {
            while (isActive) {
                delay(COUNTER_DELAY_MS)
                state.intValue++
            }
        }
    }

}

ViewModel

You can use ViewModel from Android Jetpack in Modo:

Last modified: 12 June 2024