protected void fadeIn(double frac, Context context) {
if (frac == 0d) {
group.setOpacity(0d);
animateDrawText(1d, context);
animateComputeBox(1d, context);
animateDrawBox(1d, context);
}
group.setOpacity(frac);
}
private void revealScalingGroup() {
assert scalingGroup.isVisible() == false;
scalingGroup.setVisible(true);
scalingGroup.setOpacity(0.0);
FadeTransition showHost = new FadeTransition(Duration.millis(300), scalingGroup);
showHost.setFromValue(0.0);
showHost.setToValue(1.0);
showHost.play();
}