@override
  Widget build(BuildContext context) => Slidable(
    delegate: new SlidableDrawerDelegate(),
    actionExtentRatio: 0.25,
    closeOnScroll: false,
    controller: slidableController,
    child: buildChild(context),
    actions: <Widget>[
      new IconSlideAction(
        caption: 'Archive',
        color: Colors.blue,
        icon: Icons.archive,
        onTap: () => print('Archive'),
      ),
      new IconSlideAction(
        caption: 'Share',
        color: Colors.indigo,
        icon: Icons.share,
        onTap: () => print('Share'),
      ),
    ]
  );


  Widget buildChild (BuildContext context) {
    return ListTile(
      onTap: () {
        slidableController.activeState?.open();
         Slidable.of(context)?.close();
      },
      title: Text('${_quantidade.toString()}x $_produto'),
      subtitle: Text(_descricao),
      trailing: Text(_valor.toStringAsFixed(2)),
    );
  }

        slidableController.activeState?.open();
        Slidable.of(context)?.close();