PointerInputModifierNode

PointerInputModifierNodeSample

@ExperimentalComposeUiApi
@Composable
fun PointerInputModifierNodeSample() {
    class OnPointerEventNode(var callback: (PointerEvent) -> Unit) :
        PointerInputModifierNode, Modifier.Node() {
        override fun onPointerEvent(
            pointerEvent: PointerEvent,
            pass: PointerEventPass,
            bounds: IntSize,
        ) {
            if (pass == PointerEventPass.Initial) {
                callback(pointerEvent)
            }
        }
        override fun onCancelPointerInput() {
            // Do nothing
        }
    }
    data class PointerInputElement(val callback: (PointerEvent) -> Unit) :
        ModifierNodeElement<OnPointerEventNode>() {
        override fun create() = OnPointerEventNode(callback)
        override fun update(node: OnPointerEventNode) {
            node.callback = callback
        }
        override fun InspectorInfo.inspectableProperties() {
            name = "onPointerEvent"
            properties["callback"] = callback
        }
    }
    fun Modifier.onPointerEvent(callback: (PointerEvent) -> Unit) =
        this then PointerInputElement(callback)
}