What's the recommended way to manage a bunch of fi...

# compose

[dave08]

What's the recommended way to manage a bunch of filter chips if I need to report their state back to the viewModel? Can I just pass down the MutableState from the viewmodel straight and let it be modified/observed in the chip, or should I pass a callback and, say, a Boolean for each one?

[efemoney]

You don’t “report their state back to the viewModel”, their state should be driven by the viewModel. You can expose a callback however from the VM that will update the state inside of the VM (which will then reflect in the Chip)

[dave08]

For each one have a callback + a State?

[dave08]

It gets a bit messy on the vm side...

[efemoney]

Thats up to you, you can keep one state eg List<Boolean> and one lambda that takes index onChecked { index -> … }
Or you could put it in a Map appropriate keys
Or you can have them all separate state

[dave08]

Ok, thanks! So I guess it's never really good to pass down a MutableState just to avoid all those callbacks then... I really thought that in this case that it's really more Ui code, and that the vm only really cares about the current state of all those filters -- not who or what sets them...

[efemoney]

Its good to also pass a mutable state but its a little weir and i dont recommend.