Hello, is there a way to change two states atomica...
# composeh
Henri Gourvest
10/12/2023, 9:10 PMHello, is there a way to change two states atomically? For example, to draw an object, I need to change the scale and translation. I don't want the object to be redrawn before I've changed these two states.
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Oliver.O
10/12/2023, 9:38 PMWhat makes you think you need to do this? Compose will wait until the next frame before recomposing/redrawing.
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Francesc
10/12/2023, 9:54 PMwhile you may not need it in this case, the way to have multiple state updates happen atomically is to use
Snapshot.withMutableSnapshot☝️ 3
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vide
10/13/2023, 5:12 AM^ this is only needed if you are operating from somewhere else than the UI thread
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Henri Gourvest
10/13/2023, 5:22 AMThank you for your very helpful answers. I wrongly assumed that this was the reason for my display bug. At least I've eliminated that possibility and learned something. Have a nice day!
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Oliver.O
10/13/2023, 9:54 AMGood news! If you need to use
Snapshot.withMutableSnapshot[block] must not suspend if [withMutableSnapshot] is called from a suspend function.As of Compose 1.5.1,
withMutableSnapshot Copy code
// TODO: determine a good way to prevent/discourage suspending in an inlined [block]2 Views