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A Flutter Widget to create an input with multiple chips, that can be selected from suggestions.

chips_input #

Flutter library for building input fields with InputChips as input options.

Pub Version GitHub Workflow Status

Usage #

Import #

import 'package:chips_input/chips_input.dart';

Example #

ChipsInput

First create some sort of Class that holds the data. You could also use a simple String.

class AppProfile {
  final String name;
  final String email;
  final String imageUrl;

  const AppProfile(this.name, this.email, this.imageUrl);

  @override
  bool operator ==(Object other) =>
      identical(this, other) ||
      other is AppProfile &&
          runtimeType == other.runtimeType &&
          name == other.name;

  @override
  int get hashCode => name.hashCode;

  @override
  String toString() {
    return name;
  }
}

Initialize some data and implement the ChipsInput Widget to your liking.

const mockResults = <AppProfile>[
    AppProfile('John Doe', 'jdoe@flutter.io',
        'https://d2gg9evh47fn9z.cloudfront.net/800px_COLOURBOX4057996.jpg'),
    AppProfile('Paul', 'paul@google.com',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Fred', 'fred@google.com',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Brian', 'brian@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('John', 'john@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Thomas', 'thomas@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Nelly', 'nelly@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Marie', 'marie@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Charlie', 'charlie@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Diana', 'diana@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Ernie', 'ernie@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
    AppProfile('Gina', 'fred@flutter.io',
        'https://upload.wikimedia.org/wikipedia/commons/7/7c/Profile_avatar_placeholder_large.png'),
];

ChipsInput(
    maxChips: 3, // remove, if you like infinity number of chips
    initialValue: [mockResults[1]],
    findSuggestions: (String query) {
        if (query.isNotEmpty) {
            var lowercaseQuery = query.toLowerCase();
            final results = mockResults.where((profile) {
            return profile.name
                    .toLowerCase()
                    .contains(query.toLowerCase()) ||
                profile.email
                    .toLowerCase()
                    .contains(query.toLowerCase());
            }).toList(growable: false)
            ..sort((a, b) => a.name
                .toLowerCase()
                .indexOf(lowercaseQuery)
                .compareTo(
                    b.name.toLowerCase().indexOf(lowercaseQuery)));
            return results;
        }
        return mockResults;
    },
    onChanged: (data) {
        print(data);
    },
    chipBuilder: (context, state, AppProfile profile) {
        return InputChip(
            key: ObjectKey(profile),
            label: Text(profile.name),
            avatar: CircleAvatar(
            backgroundImage: NetworkImage(profile.imageUrl),
            ),
            onDeleted: () => state.deleteChip(profile),
            materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
        );
    },
    suggestionBuilder: (context, AppProfile profile) {
        return ListTile(
            key: ObjectKey(profile),
            leading: CircleAvatar(
            backgroundImage: NetworkImage(profile.imageUrl),
            ),
            title: Text(profile.name),
            subtitle: Text(profile.email),
        );
    },
)

Instead of the suggestionBuilder you can also pass an optionsViewBuilder for more customization:

//...
optionsViewBuilder: (context, onSelected, options) {
    return Align(
        alignment: Alignment.topLeft,
        child: Material(
            elevation: 4.0,
            child: Container(
                height: 200.0,
                child: ListView.builder(
                    padding: EdgeInsets.all(8.0),
                    itemCount: options.length,
                    itemBuilder: (BuildContext context, int index) {
                        final option = options.elementAt(index);
                        return GestureDetector(
                            onTap: () {
                                onSelected(option);
                            },
                            child: ListTile(
                                key: ObjectKey(option),
                                leading: CircleAvatar(
                                    backgroundImage: NetworkImage(option.imageUrl),
                                ),
                                title: Text(option.name),
                                subtitle: Text(option.email),
                            ),
                        );
                    },
                ),
            ),
        ),
    );
},
//...

Credit #

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A Flutter Widget to create an input with multiple chips, that can be selected from suggestions.

Repository (GitHub)
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Documentation

API reference

License

MIT (LICENSE)

Dependencies

flutter

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