Custom constructor

Implementation

Custom()
    : super(
        opaque: false,
        transitionBuilder: (p0, p1, p2, p3) {
          const begin = Offset(0.0, 1.0);
          const end = Offset.zero;
          const curve = Curves.ease;

          var tween =
              Tween(begin: begin, end: end).chain(CurveTween(curve: curve));

          return SlideTransition(
            position: p1.drive(tween),
            child: Row(
              children: [
                Expanded(
                  child: Container(
                    color: Colors.black.withValues(alpha: 0.5),
                    child: Center(
                      child: p3,
                    ),
                  ),
                )
              ],
            ),
          );
        },
      );