sliding_cards.dart

class SlidingCard extends StatelessWidget {
  final double offset;
  
  @override
  Widget build(BuildContext context) {
    double gauss = math.exp(-(math.pow((offset.abs() - 0.5), 2) / 0.08)); //<--caluclate Gaussian function
    return Transform.translate(
      offset: Offset(-32 * gauss * offset.sign, 0), //<-- Translate the cards to make space between them
        ...
              child: CardContent(
                name: name,
                date: date,
                offset: gauss, //<-- Pass the gauss as offset
              ),
        ...
    );
  }
}

class CardContent extends StatelessWidget {
  final double offset; //<-- add the offset
  ...
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Transform.translate(
            offset: Offset(8 * offset, 0), //<-- translate the name label
            child: Text(name, style: TextStyle(fontSize: 20)),
          ),
          SizedBox(height: 8),
          Transform.translate(
            offset: Offset(32 * offset, 0), //<-- translate the name label
            child: Text(
              date,
              style: TextStyle(color: Colors.grey),
            ),
          ),
          Spacer(),
          Row(
            children: <Widget>[
              Transform.translate(
                offset: Offset(48 * offset, 0), //<-- translate the button
                child: RaisedButton(
                  color: Color(0xFF162A49),
                  child: Transform.translate(
                    offset: Offset(24 * offset, 0), //<-- and even the text in the button!
                    child: Text('Reserve'),
                  ),
                  ...
                ),
              ),
              Spacer(),
              Transform.translate(
                offset: Offset(32 * offset, 0), //<-- translate the price label
                child: Text(
                  '0.00 \$',
                  style: TextStyle(
                    fontWeight: FontWeight.bold,
                    fontSize: 20,
                  ),
                ),
              ),
              SizedBox(width: 16),
            ],
          )
        ],
      ),
    );
  }
}