OnScaleCallback

Provides information about a scale touch event on the car screen.

See androidx.car.app.navigation.model.NavigationTemplate class description for more details on how to receive this callback.

This method may not be called in some car systems.

1st param focusX x coordinate of the focal point in pixels. A negative value indicates that the focal point is unavailable. 2nd param focusY y coordinate of the focal point in pixels. A negative value indicates that the focal point is unavailable. 3rd param scaleFactor the scaling factor from the previous state to the current state during the scale event. This value is defined as (current state) / (previous state)