Flutter FormBuilder - flutter_form_builder

This widget helps in generation of forms in Flutter. Wraps common input types with FormField allowing validation, change detection, setting input value etc and have them in a single form

Saves you some common validations such as: required fields, number, email & url validity, min and max values for numbers, min and max character length for string based fields as well as allow you to include your own custom validation

On submission, the form returns a Map<String, dynamic> of form values if the form is valid or null otherwise.

Usage

To use this plugin, add flutter_form_builder as a dependency in your pubspec.yaml file.

Example

FormBuilder(
  context,
  autovalidate: true,
  controls: [
    FormBuilderInput.textField(
      type: FormBuilderInput.TYPE_TEXT,
      attribute: "name",
      label: "Name",
      require: true,
      min: 3,
    ),
    FormBuilderInput.dropdown(
      attribute: "dropdown",
      require: true,
      label: "Dropdown",
      hint: "Select Option",
      options: [
        FormBuilderInputOption(value: "Option 1"),
        FormBuilderInputOption(value: "Option 2"),
        FormBuilderInputOption(value: "Option 3"),
      ],
    ),
    FormBuilderInput.number(
      attribute: "age",
      label: "Age",
      require: true,
      min: 18,
    ),
    FormBuilderInput.textField(
      type: FormBuilderInput.TYPE_EMAIL,
      attribute: "email",
      label: "Email",
      require: true,
    ),
    FormBuilderInput.textField(
      type: FormBuilderInput.TYPE_URL,
      attribute: "url",
      label: "URL",
      require: true,
    ),
    FormBuilderInput.textField(
      type: FormBuilderInput.TYPE_PHONE,
      attribute: "phone",
      label: "Phone",
      //require: true,
    ),
    FormBuilderInput.password(
      attribute: "password",
      label: "Password",
      //require: true,
    ),
    FormBuilderInput.datePicker(
      label: "Date of Birth",
      attribute: "dob",
    ),
    FormBuilderInput.timePicker(
      label: "Appointment Time",
      attribute: "time",
    ),
    FormBuilderInput.checkboxList(
      label: "My Languages",
      attribute: "languages",
      require: false,
      value: ["Dart"],
      options: [
        FormBuilderInputOption(value: "Dart"),
        FormBuilderInputOption(value: "Kotlin"),
        FormBuilderInputOption(value: "Java"),
        FormBuilderInputOption(value: "Swift"),
        FormBuilderInputOption(value: "Objective-C"),
      ],
    ),
    FormBuilderInput.radio(
      label: "My Best Language",
      attribute: "best_language",
      require: true,
      options: [
        FormBuilderInputOption(value: "Dart"),
        FormBuilderInputOption(value: "Kotlin"),
        FormBuilderInputOption(value: "Java"),
        FormBuilderInputOption(value: "Swift"),
        FormBuilderInputOption(value: "Objective-C"),
      ],
    ),
    FormBuilderInput.checkbox(
      label: "I accept the terms and conditions",
      attribute: "accept_terms",
      hint: "Kindly make sure you've read all the terms and conditions",
      validator: (value){
        if(!value)
          return "Accept terms to continue";
      }
    ),
    FormBuilderInput.slider(
      label: "Slider",
      attribute: "slider",
      hint: "Hint",
      min: 0.0,
      require: true,
      max: 100.0,
      value: 10.0,
      divisions: 20,
    ),
    FormBuilderInput.stepper(
      label: "Stepper",
      attribute: "stepper",
      value: 10,
      step: 1,
      hint: "Hint",
    ),
    FormBuilderInput.rate(
      label: "Rate",
      attribute: "rate",
      iconSize: 48.0,
      value: 1,
      max: 5,
      hint: "Hint",
    ),
    FormBuilderInput.segmentedControl(
        label: "Movie Rating (Archer)",
        attribute: "movie_rating",
        require: true,
        options: [
          FormBuilderInputOption(
            value: 1,
          ),
          FormBuilderInputOption(
            value: 2,
          ),
          FormBuilderInputOption(
            value: 3,
          ),
          FormBuilderInputOption(
            value: 4,
          ),
          FormBuilderInputOption(
            value: 5,
          ),
          FormBuilderInputOption(
            value: 6,
          ),
          FormBuilderInputOption(
            value: 7,
          ),
          FormBuilderInputOption(
            value: 8,
          ),
          FormBuilderInputOption(
            value: 9,
          ),
          FormBuilderInputOption(
            value: 10,
          ),
        ]),
  ],
  onChanged: () {
    print("Form Changed");
  },
  onSubmit: (formValue) {
    if (formValue != null) {
      print(formValue);
    } else {
      print("Form invalid");
    }
  },
),

TODO:

  • Improve documentation by showing complete list of input types and their usage and options
  • Add more FormBuilderInput types

KNOWN ISSUES - HELP NEEDED (Send help ;-P)

  • Proper validation for URL
  • Resetting the form doesn't clear all FormFields

Libraries

flutter_form_builder