Text Form Field Flutter

A highly customizable Flutter text form field widget that supports various label behaviors, styling options, and validation features.

Features

• Multiple label behavior styles (never, auto, always, external)
• Comprehensive theming support
• Built-in form validation
• Customizable borders and colors
• Support for prefix and suffix icons
• Error handling and display
• Responsive design support

Installation

Add this to your package's pubspec.yaml file:

dependencies:
  text_form_field_flutter: ^0.0.4

Examples

Basic Usage

TextFormFieldFlutter(
  labelText: 'Username',
  hintText: 'Enter your username',
);

Email Field with Validation

TextFormFieldFlutter(
  labelText: 'Email',
  hintText: 'Enter your email',
  keyboardType: TextInputType.emailAddress,
  prefixIcon: Icon(Icons.email),
  validator: (value) {
    bool isEmailValid = RegExp(
      r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+"
    ).hasMatch(value ?? '');
    
    if (value == null || value.isEmpty) {
      return 'Email is required';
    } else if (!isEmailValid) {
      return 'Enter a valid email';
    }
    return null;
  },
);

Password Field

TextFormFieldFlutter(
  labelText: 'Password',
  hintText: 'Enter your password',
  obscureText: true,
  prefixIcon: Icon(Icons.lock),
  validator: (value) {
    if (value == null || value.isEmpty) {
      return 'Password is required';
    } else if (value.length < 6) {
      return 'Password must be at least 6 characters';
    }
    return null;
  },
);

Custom Styling

TextFormFieldFlutter(
  labelText: 'Custom Field',
  hintText: 'Enter text',
  fillColor: Colors.grey[200],
  borderRadius: 8.0,
  labelColor: Colors.blue,
  borderColor: Colors.blue,
  labelFontSize: 16.0,
  hintFontSize: 14.0,
);

Different Label Behaviors

// External Label
TextFormFieldFlutter(
  labelText: 'External Label',
  hintText: 'Enter text',
  labelBehaviorStyles: LabelBehaviorStyles.labelExternal,
);

// Floating Label
TextFormFieldFlutter(
  labelText: 'Floating Label',
  hintText: 'Enter text',
  labelBehaviorStyles: LabelBehaviorStyles.labelAuto,
);

// Always Floating Label
TextFormFieldFlutter(
  labelText: 'Always Floating',
  hintText: 'Enter text',
  labelBehaviorStyles: LabelBehaviorStyles.labelAlways,
);

Complete Form Example

class MyForm extends StatefulWidget {
  @override
  _MyFormState createState() => _MyFormState();
}

class _MyFormState extends State<MyForm> {
  final _formKey = GlobalKey<FormState>();
  final _emailController = TextEditingController();
  final _passwordController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Form(
      key: _formKey,
      child: Column(
        children: [
          TextFormFieldFlutter(
            labelText: 'Email',
            hintText: 'Enter your email',
            controller: _emailController,
            keyboardType: TextInputType.emailAddress,
            prefixIcon: Icon(Icons.email),
            validator: (value) {
              if (value?.isEmpty ?? true) {
                return 'Please enter email';
              }
              return null;
            },
          ),
          SizedBox(height: 16),
          TextFormFieldFlutter(
            labelText: 'Password',
            hintText: 'Enter your password',
            controller: _passwordController,
            obscureText: true,
            prefixIcon: Icon(Icons.lock),
            validator: (value) {
              if (value?.isEmpty ?? true) {
                return 'Please enter password';
              }
              return null;
            },
          ),
          SizedBox(height: 24),
          ElevatedButton(
            onPressed: () {
              if (_formKey.currentState?.validate() ?? false) {
                // Form is valid, process the data
                print('Email: ${_emailController.text}');
                print('Password: ${_passwordController.text}');
              }
            },
            child: Text('Submit'),
          ),
        ],
      ),
    );
  }

  @override
  void dispose() {
    _emailController.dispose();
    _passwordController.dispose();
    super.dispose();
  }
}

Available Properties

Property	Type	Description
labelText	String	The text to display as the field label
hintText	String	Placeholder text when field is empty
validator	Function?	Function that returns error message or null
labelBehaviorStyles	LabelBehaviorStyles	Controls how the label behaves
fillColor	Color?	Background color of the field
borderColor	Color?	Color of the field border
labelColor	Color?	Color of the label text
hintColor	Color?	Color of the hint text
borderRadius	double?	Radius of the field corners
labelFontSize	double?	Size of the label text
hintFontSize	double?	Size of the hint text
prefixIcon	Widget?	Icon shown before the input
suffixIcon	Widget?	Icon shown after the input
obscureText	bool	Whether to hide the input text
readOnly	bool	Whether the field is read-only

Contributing

Contributions are welcome! If you find a bug or want a feature, please create an issue.

License

Copyright (c) 2025 Mansoor Imtiaz

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is furnished
to do so.