piotrmoskala/flutter_members_widget

Flutter widget to show avatars in a row with little negative inset to achieve covering effect

members_widget

Check members.dart to find easy-to-use widget to show grouped avatars e.g members of some event

with grouping items that cannot be shown on the screen beacuse widget is too small.

Getting Started

All you have to do is to extend your data model with MemberMixin

abstract class MemberMixin {
  factory MemberMixin._() => null;

  bool hasAvatar(); 
  String avatarUrl(); 
  String initials();
}

for example let's create an User data class:

class User with MemberMixin {
  String imageUrl;
  String firstName; 
  String lastName;

  User({this.imageUrl, this.firstName, this.lastName});

  @override
  String avatarUrl() {
    return imageUrl;
  }

  @override
  bool hasAvatar() {
    return imageUrl != null;
  }

  @override
  String initials() {
    return firstName.substring(0,1)+""+lastName.substring(0,1);
  }
}

and then use it while creating widgets:

 @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
          margin: EdgeInsets.only(left: 0, right: 160),
          color: Colors.black12,
          alignment: Alignment.center,
          child:
            Members(members: [
                User(firstName: "John", lastName: "Wayne", imageUrl: "https://i1.sndcdn.com/avatars-000475270878-w0r5zp-t500x500.jpg"),
                User(firstName: "Joe", lastName: "Doe"),
                User(firstName: "John", lastName: "Wayne", imageUrl: "https://i1.sndcdn.com/avatars-000475270878-w0r5zp-t500x500.jpg"),
                User(firstName: "Peter", lastName: "Kowalsky"),
                User(firstName: "John", lastName: "Wayne", imageUrl: "https://avatarfiles.alphacoders.com/194/194221.jpg"),
                User(firstName: "Ann", lastName: "Lee", imageUrl: "https://avatarfiles.alphacoders.com/103/103875.png"),
                User(firstName: "Ann", lastName: "Lee")
            ])
          ,
        ),
      )
  }