@override
  Widget build(BuildContext context) {
    return new Container(
        decoration: new BoxDecoration(
            color: getCardColor(_classType),
            shape: BoxShape.rectangle,
            borderRadius: new BorderRadius.circular(8.0),
            boxShadow: <BoxShadow>[
              new BoxShadow(
                color: Colors.black12,
                blurRadius: 10.0,
                offset: new Offset(0.0, 10.0),
              )
            ]),
        margin: const EdgeInsets.only(
            top: 8.0, bottom: 8.0, left: 8.0, right: 8.0),
        child: new Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            new Container(
              margin: const EdgeInsets.only(
                  top: 8.0, bottom: 8.0, left: 16.0, right: 8.0),
              child: new Row(
                children: <Widget>[
                  new Column(
                    children: <Widget>[
                      new Text(getFirstTime(_classId), style: headerTextStyle),
                      new Text(getSecondTime(_classId), style: headerTextStyle),
                    ],
                  ),
                  new Container(width: 24.0),
                  new Container(
                    width: 185.0,
                    child: new Text(_title, style: headerTextStyle),
                  ),
                ],
              ),
            ),
          ],
        ));
  }