Input Formatter plugin for Flutter

A Flutter package that provides customizable input formatting for text fields. Easily enforce specific patterns and separators, ensuring consistent and user-friendly text input experiences. Ideal for formatting dates, numbers, or any other structured input, this package enhances your app's data entry interface.

This package extends pattern_formatter, adding enhanced functionality for precise and flexible numeric input handling. Key features include:

• Extended Decimal Precision: Supports up to 18 decimal digits, ensuring high accuracy for financial or scientific applications.
• Precision Preservation with Decimal: Uses the Decimal library to prevent unintended rounding of double values.
• Input Length Control: Limits the maximum number of input characters, ensuring consistency and avoiding overflow.
• Original Value Extraction: Provides a method to convert formatted values back to the raw, original numeric input.
• Locale-Specific Custom Formatting: Allows custom formatting rules based on locale, making the package versatile across regional formats.

Getting Started

Add pubspec.yaml

dependencies:
  text_input_formatter: ^1.0.0

Usage

import 'package:text_input_formatter/text_input_formatter.dart';

Numeric Format

// defined reusable formatter
final formatter = NumericFormatter(
  allowFraction: true,
  fractionDigits: 5,
  thousandSeparator: ' ',
);
// ...

TextField(
    inputFormatters: [formatter],
    onChanged: (value) {
      // use the formatter to parse the original value
      final originalValue = formatter.original(value);
      print(originalValue);
    } 
),

Date Format

TextField(
    decoration: InputDecoration(
        hintText: DatePattern.yyyy_MM_dd.value,
    ),
    inputFormatters: [
        DateFormatter(
            separator: DateSeparator.dash,
            pattern: DatePattern.yyyy_MM_dd,
        ),
    ],
)

Credit Card

TextField(
    inpuFormatters: [
        CreditCardFormatter(),
    ],
)