pop.dart

class PopMenuWidget extends StatefulWidget {
  Channel channel;

  VoidCallback onDelete;

  PopMenuWidget(BuildContext context, this.channel, onDelete);

  @override
  _PopMenuWidgetState createState() => _PopMenuWidgetState();
}

class _PopMenuWidgetState extends State<PopMenuWidget> {
  List<bool> isSelected = [true, false, false];

  @override
  Widget build(BuildContext context) => PopupMenuButton<int>(
        onSelected: (result) {
          //View
          if (result == 0) {
            Navigator.push(
              context,
              MaterialPageRoute(
                  builder: (context) => NativePage(
                        channel: widget.channel,
                      )),
            );
          }

          //Edit
          if (result == 1) {
            _showMaterialDialog() {
              showDialog(
                  context: context,
                  builder: (_) => new AlertDialog(
                        title: Column(
                          children: [
                            new Text("${widget.channel.Name}"),
                          ],
                        ),
                        content: Column(
                          children: [
                            new Text("Edit"),
                            Padding(
                              padding: const EdgeInsets.all(8.0),
                              child: ToggleSwitch(
                                minWidth: 90.0,
                                initialLabelIndex: 1,
                                cornerRadius: 20.0,
                                activeFgColor: Colors.white,
                                inactiveBgColor: Colors.grey,
                                inactiveFgColor: Colors.white,
                                labels: ['Male', 'Female'],
                                icons: [
                                  Icons.check_circle_outline,
                                  Icons.highlight_off
                                ],
                                activeBgColors: [Colors.green, Colors.pink],
                                onToggle: (index) {
                                  print('switched to: $index');
                                },
                              ),
                            ),
                          ],
                        ),
                        actions: <Widget>[
                          FlatButton(
                            child: Text('Close'),
                            onPressed: () {
                              Navigator.of(context).pop();
                            },
                          )
                        ],
                      ));
            }

            _showMaterialDialog();
          }

          //Delete
          if (result == 2) {
            widget.onDelete();
          }
        },
        itemBuilder: (context) => [
          PopupMenuItem(
            value: 0,
            child: Row(
              children: <Widget>[
                Icon(
                  Icons.remove_red_eye_rounded,
                  color: Colors.black38,
                ),
                Text('  View', style: TextStyle(color: Colors.black38)),
              ],
            ),
          ),
          PopupMenuItem(
            value: 1,
            child: Row(
              children: <Widget>[
                Icon(
                  Icons.create,
                  color: Colors.black38,
                ),
                Text(' Edit',
                    style: TextStyle(color: Colors.black38)),
              ],
            ),
          ),
          PopupMenuItem(
            value: 2,
            child: Row(
              children: <Widget>[
                Icon(
                  Icons.delete,
                  color: Colors.black38,
                ),
                Text('  Delete', style: TextStyle(color: Colors.black38)),
              ],
            ),
          ),
        ],
      );
}