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Multi select form field

A multi select form field using alert dialog to select multiple items with checkboxes and showing as chips.

Demo

Features

  • Can be used as regular form field.
  • Simple to implement.
  • Simple and intuitive to use in the app.
  • Provides validation of data.
  • Provides requirement of the field.
  • Customizable texts.
  • Follows the app theme and colors.

Customization Parameters MultiFormField

ParameterDescription
title WidgetSet Title of MultiSelectTextFormField.
hintWidget WidgetSet Hint Text of MultiSelectTextFormField.
required boolAdd Selection is Compulsary or not.
errorText StringError String to be Displayed
dataSource ListList of Data as DataSource To Select.
textField StringKey Param from List (DataSource).
valueField StringValue Param From List (DataSource).
okButtonLabel String*POsitive Button Label String.
cancelButtonLabel String*Negative Button Label String.
fillColor Color WidgetChanges background color of FormField

Customization Selection Dialog

ParameterDescription
Shape ShapeBorderCustomizes the Shape Of AlertDialog
dialogTextStyle TextStyleCustomizes the TextStyle Of AlertDialog
checkBoxCheckColor ColorCustomizes the CheckColor
checkBoxActiveColor ColorCustomizes the CheckBoxActiveColor

Customization Selection Chip

ParameterDescription
chipLabelStyle TextStyleCustomizes the TextStyle Of Selected Chip
chipBackGroundColor ColorCustomizes the Color Of Selected Chip

Minimal Example

MultiSelectFormField(
                  autovalidate: false,
                  chipBackGroundColor: Colors.red,
                  chipLabelStyle: TextStyle(fontWeight: FontWeight.bold),
                  dialogTextStyle: TextStyle(fontWeight: FontWeight.bold),
                  checkBoxActiveColor: Colors.red,
                  checkBoxCheckColor: Colors.green,
                  dialogShapeBorder: RoundedRectangleBorder(
                      borderRadius: BorderRadius.all(Radius.circular(12.0))),
                  title: Text(
                    "Title Of Form",
                    style: TextStyle(fontSize: 16),
                  ),
                  dataSource: [
                    {
                      "display": "Running",
                      "value": "Running",
                    },
                    {
                      "display": "Climbing",
                      "value": "Climbing",
                    },
                    {
                      "display": "Walking",
                      "value": "Walking",
                    },
                  ],
                  textField: 'display',
                  valueField: 'value',
                  okButtonLabel: 'OK',
                  cancelButtonLabel: 'CANCEL',
                  hintWidget: Text('Please choose one or more'),
                  initialValue: _myActivities,
                  onSaved: (value) {
                    if (value == null) return;
                    setState(() {
                      _myActivities = value;
                    });
                  },
                ),

Example

import 'package:multiselect_formfield/multiselect_formfield.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List _myActivities;
  String _myActivitiesResult;
  final formKey = new GlobalKey<FormState>();

  @override
  void initState() {
    super.initState();
    _myActivities = [];
    _myActivitiesResult = '';
  }

  _saveForm() {
    var form = formKey.currentState;
    if (form.validate()) {
      form.save();
      setState(() {
        _myActivitiesResult = _myActivities.toString();
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('MultiSelect Formfield Example'),
      ),
      body: Center(
        child: Form(
          key: formKey,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.start,
            children: <Widget>[
              Container(
                padding: EdgeInsets.all(16),
                child: MultiSelectFormField(
                  autovalidate: false,
                  titleText: 'My workouts',
                  validator: (value) {
                    if (value == null || value.length == 0) {
                      return 'Please select one or more options';
                    }
                  },
                  dataSource: [
                    {
                      "display": "Running",
                      "value": "Running",
                    },
                    {
                      "display": "Climbing",
                      "value": "Climbing",
                    },
                    {
                      "display": "Walking",
                      "value": "Walking",
                    },
                    {
                      "display": "Swimming",
                      "value": "Swimming",
                    },
                    {
                      "display": "Soccer Practice",
                      "value": "Soccer Practice",
                    },
                    {
                      "display": "Baseball Practice",
                      "value": "Baseball Practice",
                    },
                    {
                      "display": "Football Practice",
                      "value": "Football Practice",
                    },
                  ],
                  textField: 'display',
                  valueField: 'value',
                  okButtonLabel: 'OK',
                  cancelButtonLabel: 'CANCEL',
                  // required: true,
                  hintText: 'Please choose one or more',
                  value: _myActivities,
                  onSaved: (value) {
                    if (value == null) return;
                    setState(() {
                      _myActivities = value;
                    });
                  },
                ),
              ),
              Container(
                padding: EdgeInsets.all(8),                
                child: RaisedButton(
                  child: Text('Save'),
                  onPressed: _saveForm,
                ),
              ),
              Container(
                padding: EdgeInsets.all(16),
                child: Text(_myActivitiesResult),
              )
            ],
          ),
        ),
      ),
    );
  }
}

License

This project is licensed under the BSD License. See the LICENSE file for details.

Libraries

multiselect_dialog
multiselect_formfield