private void onCourseListScrollChanged(int scrollY) {
if (onScroll != null) {
onScroll.handle(courseList, scrollY);
}
// Animate tab elevation depending on the scroll distance.
float maxElevation = ViewUtils.dpToPx(this, TAB_SCROLL_ELEVATION);
float elevationDistance = ViewUtils.dpToPx(this, TAB_SCROLL_ELEVATION_DISTANCE);
float elevationAmount = Math.min(elevationDistance, scrollY) / elevationDistance;
float elevation = maxElevation * elevationAmount;
tabs.setElevation(elevation);
}
