Flutter GetX: Animation with GetxController - flutter

Question

I'm trying GetX for my new project and tried to use AnimationController which is inspired this comment. Everything works fine with default value for Tween -> blur & spread & AnimationController -> duration.
What I'm doing:
1: Created an widget with corresponding controller (controller is binded through initialBinding of GetMaterialApp).
GetMaterialApp(
...
initialBinding: AnimationBinding()
...
);
class AnimationBinding extends Bindings {
#override
void dependencies() {
Get.lazyPut<AnimationController>(
() => AnimationController(),
);
}
}
class CustomAnimatedWidget extends StatelessWidget {
#override
Widget build(BuildContext context) {
return GetBuilder<LogoAnimationController>(
builder: (_) {
return Container(
width: 150,
height: 150,
child: Text('for demo only, originally its not text widget'),
...
remaining code that uses `_.animation.value`
...
),
);
},
);
}
}
class AnimationController extends GetxController with SingleGetTickerProviderMixin {
Animation animation;
AnimationController _animationController;
#override
void onInit() {
super.onInit();
_animationController = AnimationController(
vsync: this, duration: Duration(seconds: 2));
_animationController.repeat(reverse: true);
animation = Tween(begin: 2.0, end: 15.0)
.animate(_animationController)
..addListener(() => update());
}
#override
void onReady() {
super.onReady();
}
#override
void onClose() {
super.onClose();
_animationController.dispose();
}
}
2: Used this widget inside view.
child: CustomAnimatedWidget();
Till now, everything is working fine. But I want to update blur, spread & duration, with:
updating CustomAnimatedWidget:
final double blur;
final double spread;
final int duration;
CustomAnimatedWidget({this.blur, this.spread, this.duration});
...
builder: (_) => ...
...
initState: (s) {
_.blur.value = blur;
_.spread.value = spread;
_.duration.value = duration;
},
...
updating AnimationController:
Rx<double> blur = 2.0.obs;
Rx<double> spread = 15.0.obs;
Rx<int> duration = 2.obs;
and using/calling the CustomAnimationWidget using:
child: CustomAnimatedWidget(duration: 4, blur: 2, spread: 10);
but don't know how to use it with _animationController & _animation because they are called in onInit.
Please share your solutions, thanks.

Answer 1

I Extended GetxController with GetTickerProviderStateMixin and then make a AnimationController and CurvedAnimation by code below:
late final AnimationController _controller = AnimationController(
duration: const Duration(seconds: 2),
vsync: this,
)..repeat(reverse: false);
late final Animation<double> animation = CurvedAnimation(
parent: _controller,
curve: Curves.ease,
);
After that i just created object of my CustomGetxController like this final _customController = Get.put(CustomGetxController()); then i called it like this:
FadeTransition(
opacity: driverController.animation,
child:const Text('My Flashing Text')
),