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Indication

@Stable interface Indication
androidx.compose.foundation.Indication

Indication represents visual effects that occur when certain interactions happens. For example: showing a ripple effect when a component is pressed, or a highlight when a component is focused.

An instance of Indication is a factory that is required to produce IndicationInstances on demand for each component that uses an indication modifier using rememberUpdatedInstance.

Indication is typically provided throughout the hierarchy through LocalIndication - you can provide a custom Indication to LocalIndication to change the default Indication used for components such as clickable.

Summary

Public methods
abstract IndicationInstance

remembers a new IndicationInstance, and updates its state based on Interactions emitted via interactionSource .

Public methods

rememberUpdatedInstance

@Composable abstract fun rememberUpdatedInstance(interactionSource: InteractionSource): IndicationInstance

remembers a new IndicationInstance, and updates its state based on Interactions emitted via interactionSource . Typically this will be called by indication, so one IndicationInstance will be used for one component that draws Indication, such as a button.

Implementations of this function should observe Interactions using interactionSource, using them to launch animations / state changes inside IndicationInstance that will then be reflected inside IndicationInstance.drawIndication.

Parameters
interactionSource: InteractionSource the InteractionSource representing the stream of Interactions the returned IndicationInstance should represent
Return
an IndicationInstance that represents the stream of Interactions emitted by interactionSource