tf_form 0.0.2

TechFusion's form builder and validator

TFForm

A Flutter package for creating a form container to group multiple common form widgets together and validate them automatically.

Copyright (c) 2022 TechFusion Ltd (https://www.techfusion.dev)

Installing

In the pubspec.yaml of your flutter project, add the following dependency:

dependencies:
  ...
  tf_form: ^0.0.1

In your library add the following import:

import 'package:tf_form/tf_form.dart';

Widgets

TFForm

The TFForm widget acts as a container for grouping and validating multiple form widgets provided by package. It requires a GlobalKey to allow validation of the form in a later step. Also, you can configure error messages or style the form by passing arguments to the constructor.

    final _formKey = GlobalKey<TFFormState>();

    @override
    Widget build(BuildContext context) {
        // Build a TFForm widget using the _formKey created above.
        return TFForm(
        key: _formKey,
        child: Column(
                children: <Widget>[
                    // Add form widgets and ElevatedButton here.
                ],
            ),
        );
    }

TFTextField

A text field is the most popular form widget. It lets the user enter text, either with hardware keyboard or with an onscreen keyboard.

    TFTextField(
        title: "Nickname",
        hintText: "Enter a nickname",
        controller: nicknameController,
        validationTypes: const [
            TFValidationType.required,
        ],
    ),

TFDropdownField

A dropdown field allows the user to pick a value from a dropdown list

    TFDropdownField(
        title: "Role",
        items: const [
            "Member",
            "Seller",
            "Admin",
        ],
        controller: roleController,
        initialItem: "Member",
        validationTypes: const [
            TFValidationType.required,
        ],
    ),

TFDateField

A date field allows the user to pick a DateTime.=

    TFDateField(
        title: "Birthday",
        initialDate: DateTime.now(),
        firstDate: DateTime.now().subtract(const Duration(days: 365)),
        lastDate: DateTime.now().add(const Duration(days: 365)),
        controller: birthdayController,
        validationTypes: const [
            TFValidationType.required,
        ],
    ),

TFRadioGroup

A radio group allows user to select one option from multiple selections

    TFCheckboxGroup(
        title: "Which social network do you usually use ?",
        items: [
            TFCheckboxItem(title: "Facebook"),
            TFCheckboxItem(title: "Zalo"),
            TFCheckboxItem(title: "Twitter"),
            TFCheckboxItem(title: "Linkedin"),
            TFCheckboxItem(title: "Telegram"),
        ],
        onChanged: (checkedItemIndexes) {},
        validationTypes: const [
            TFValidationType.required,
        ],
    ),

TFCheckboxGroup

A checkbox group allows user to select multiple items

    TFRadioGroup<String>(
        title: "Gender",
        items: [
            TFRadioItem<String>(title: "Male", value: "male"),
            TFRadioItem<String>(title: "Female", value: "female"),
            TFRadioItem<String>(title: "Other", value: "other"),
        ],
        onChanged: (selectedItem) {},
        validationTypes: const [
            TFValidationType.requiredIfHas,
        ],
        relatedController: nicknameController,
    ),

Basic Usage

• First, create a TFForm

• Add one of the above form widgets as children of TFForm. The TFForm simply makes it easier to validate all at once.

• Finally, create a button to validate the form.

    ElevatedButton(
        onPressed: () {
            _formKey.currentState!.validate();
        },
        child: const Text('Submit'),
    ),