Add EdgeTapNavigation to trigger page turns on edge taps

[mickael-menu]

Added

Navigator

• A new convenience utility EdgeTapNavigation to trigger page turns while tapping the screen edges.
  • It takes into account the navigator reading progression to move into the right direction.
  • Call it from the VisualNavigator.Listener.onTap() callback as demonstrated below:

  override fun onTap(point: PointF): Boolean {
      val navigated = edgeTapNavigation.onTap(point, requireView())
      if (!navigated) {
          // Fallback action, for example toggling the app bar.
      }
      return true
  }

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This utility is useful for two reasons:

• We want to let the apps have total control over the tap events, and decide whether or not to handle page turns with edge taps.
• Implementing the edge taps properly (taking into account the reading progression) is not so easy.

[qnga]

Makes sense!