I made a `PointerInputScope.detectTripleTap` exten...

# compose

[Travis Griggs]

I made a PointerInputScope.detectTripleTap extension. Would love any feedback on whether I'm at all in the right direction. It seems to work... at least, in isolation. Code in thread.

[Travis Griggs]

suspend fun PointerInputScope.detectTripleTap(tolerance: Dp = 20.dp, onTripleTap: UnaryAction<Offset> = { _ -> }) {
    val tolerancePixels = tolerance.toPx()
    awaitEachGesture {
       val firstTap = awaitFirstDown()
       val startPoint = firstTap.position
       var canceled = false
       var taps = 0
       withTimeout(viewConfiguration.doubleTapTimeoutMillis * 2) {
          do {
             val event = awaitPointerEvent()
             canceled = canceled || event.isConsumed
             if (NOT(canceled)) {
                when (event.type) {
                   PointerEventType.Release -> {
                      taps += 1
                      val endPoint = event.changes.first { change -> change.changedToUpIgnoreConsumed() }
                      val noise = (endPoint.position - startPoint).radius
                      if (noise > tolerancePixels) {
                         noise.logged("$taps TOO NOISY")
                         canceled = true
                      }
                      else if (taps == 3) {
                         event.consume()
                      }
                   }
                }
             }
          } while (NOT(canceled) && taps < 3)
          if (NOT(canceled)) {
             onTripleTap(startPoint)
          }
       }
    }
}


@Preview(showBackground = true)
@Composable
private fun TripleTapPreview() {
    Spacer(modifier = Modifier
       .fillMaxSize()
       .pointerInput(Unit) {
          detectTripleTap { offset -> offset.logged("TRIPLE TAP") }
       })
}

[Travis Griggs]

(helper functions UnaryAction, NOT, consume, isConsumed, radius, and logged available on request if not obvious)