ex_001_animated_container

ex_001_animated_container

This is a replication of the AnimatedContainer example using AnimateWidget.

void main() => runApp(const MyAnimatedContainer());

class MyAnimatedContainer extends StatelessWidget {
  const MyAnimatedContainer({Key? key}) : super(key: key);

  static const String _title = 'Implicit Animation';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

/// This is the stateful widget that the main application instantiates.
class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({Key? key}) : super(key: key);

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

/// This is the private State class that goes with MyStatefulWidget.
class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  bool selected = false;

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        setState(() {
          selected = !selected;
        });
      },
      child: Center(
             child: AnimateWidget(
             duration: const Duration(seconds: 2),
             curve: Curves.fastOutSlowIn,
             builder: (context, animate) {
                final width = animate(selected ? 200.0 : 100.0);
                final height = animate(selected ? 100.0 : 200.0, 'height');
                final alignment = animate(
                selected
                    ? Alignment.center
                    : AlignmentDirectional.topCenter,
                );
                final Color? color = animate(
                selected ? Colors.red : Colors.blue,
                );
                return Container(
                    width: width,
                    height: height,
                    color: color,
                    alignment: alignment,
                    child: const FlutterLogo(size: 75),
                );
            },
            ),
        ),
    );
  }
}