Flutter: Simple slide up widget animation

Step 1: Static UI

home_screen.dart

class HomeScreenBody extends StatelessWidget {
  SlideUpController slideUpController = SlideUpController();

  @override
  Widget build(BuildContext context) {
    return Stack(
      alignment: Alignment.bottomCenter,
      children: [
        Container(
          child: Column(
            children: [
              RaisedButton(
                child: Text('Slide up widget'),
                onPressed: () {
                  
                },
              )
            ]…