initAnimation method
Initialize the Animation.
Implementation
@override
void initAnimation(AnimationController controller) {
_fadeIn = Tween<double>(begin: 0.0, end: 1.0).animate(
CurvedAnimation(
parent: controller,
curve: Interval(0.0, fadeInEnd, curve: Curves.linear),
),
);
_fadeOut = Tween<double>(begin: 1.0, end: 0.0).animate(
CurvedAnimation(
parent: controller,
curve: Interval(fadeOutBegin, 1.0, curve: Curves.linear),
),
);
}