Swipe to Dismiss

gistfile1.txt

  void showSnackBar() {
    ScaffoldMessenger.of(context)
        .showSnackBar(SnackBar(content: Text('Você arquivou essa mensagem!')));
  }

  Future<bool> showAlertDialog() async {
    return await showDialog(
        context: context,
        builder: (BuildContext context) {
          return AlertDialog(
            title: Text('Deletar item'),
            content: Text('Você tem certeza que deseja deletar?'),
            actions: [
              ElevatedButton(
                  onPressed: () {
                    Navigator.of(context).pop(true);
                  },
                  child: Text('Deletar')),
              ElevatedButton(
                  onPressed: () {
                    Navigator.of(context).pop(false);
                  },
                  child: Text('Cancelar'))
            ],
          );
        });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('SwipeToDismiss - Mensagens'),
          centerTitle: true,
        ),
        body: ListView.builder(
          itemCount: minhasMensagens.length,
          itemBuilder: (BuildContext context, int index) {
            return Dismissible(
                key: UniqueKey(),
                child: ListTile(
                  title: Text(minhasMensagens[index].titulo),
                  subtitle: Text(minhasMensagens[index].corpo),
                ),
                background: Container(
                  padding: EdgeInsets.all(20),
                  color: Colors.green[400],
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.start,
                    children: [
                      Icon(Icons.archive_rounded),
                    ],
                  ),
                ),
                secondaryBackground: Container(
                    padding: EdgeInsets.all(20),
                    color: Colors.red[400],
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.end,
                      children: [
                        Icon(Icons.delete_sweep_rounded),
                      ],
                    )),
                onDismissed: (DismissDirection direction) {
                  if (direction == DismissDirection.startToEnd) {
                    return showSnackBar();
                  }
                },
                confirmDismiss: (DismissDirection direction) async {
                  if (direction == DismissDirection.endToStart) {
                    return await showAlertDialog();
                  }
                  return false;
                });
          },
        )
        );