INNER CODE UNIT · Dart

_BoxState

afgprogrammer/Flutter-examples · lib/pages/animated_container.dart:10

class _BoxState extends State<Box> with SingleTickerProviderStateMixin {
  late AnimationController _controller;

  double width = 50;
  double height = 50;

  @override
  void initState() {
    _controller = AnimationController(
      duration: const Duration(milliseconds: 5000),
      vsync: this,
    );
    _controller.addListener(() {
      setState(() {
        if (_controller.value <= 0.1) {
          width = 180;
          height = 170;
        } else if(_controller.value <= 0.3) {

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