Focus
Holds a stable focus handle independently of any platform View instance.
One requester may attach to multiple targets. Requests are offered in attachment order until a target accepts. Connector membership and restoration state are synchronized; connector callbacks run synchronously on the caller's thread without holding the membership lock, except for focus-state inspection during saveFocusedChild.
Samples
val requester = FocusRequester()
val target = RecordingFocusConnector(restorationKey = "search-field")
requester.attach(target)
check(requester.requestFocus())
check(target.lastDirection == FocusDirection.Enter)
target.state = FocusState(isFocused = true, hasFocus = true)
check(requester.saveFocusedChild())
requester.detach(target)
val remounted = RecordingFocusConnector(restorationKey = "search-field")
requester.attach(remounted)
check(remounted.lastDirection == FocusDirection.Enter)Content copied to clipboard
Functions
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Attaches one platform focus target.
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Detaches connector from future requests.
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Requests focus from attached targets in attachment order.
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Restores the target previously captured by saveFocusedChild.
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Saves the restoration key of the first attached target whose subtree owns focus.