Super useful and insightful. Looking forward to more on the inner workings of this mechanism!
The part about advancing global snapshots had me a little confused. Are global snapshots "automatically" advanced only when also paired with Compose UI (where composables + UI frames are involved)? i.e. manipulating mutable states in View toolkit world would require using something like withMutableSnapshot {} ?
Yes. If you're not using the rest of the Compose UI Android runtime, then nothing is advancing the global snapshot for you. Using withMutableSnapshot is one approach, although it's easy to forget to do that and you'd need to use it even in event handlers which would probably feel pretty boilerplatey. It would probably be better to set up your own callback to advance the global snapshot on every frame, similar to how Compose UI Android works under the hood.
It would probably be better to set up your own callback to advance the global snapshot on every frame, similar to how Compose UI Android works under the hood
Ahh yes perfect, this was the missing piece for me. Trying to experiment with using these APIs in Fragments/Android Views for some interop cases. Thank you!
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Super useful and insightful. Looking forward to more on the inner workings of this mechanism!
The part about advancing global snapshots had me a little confused. Are global snapshots "automatically" advanced only when also paired with Compose UI (where composables + UI frames are involved)? i.e. manipulating mutable states in View toolkit world would require using something like withMutableSnapshot {} ?
Yes. If you're not using the rest of the Compose UI Android runtime, then nothing is advancing the global snapshot for you. Using
withMutableSnapshotis one approach, although it's easy to forget to do that and you'd need to use it even in event handlers which would probably feel pretty boilerplatey. It would probably be better to set up your own callback to advance the global snapshot on every frame, similar to how Compose UI Android works under the hood.true
Ahh yes perfect, this was the missing piece for me. Trying to experiment with using these APIs in Fragments/Android Views for some interop cases. Thank you!