Calculator Flutter Package

This Flutter package provides a customizable calculator widget that can be easily integrated into any Flutter application.

Features

Customizable UI:
- Change the colors of background, buttons, and text to match your app's theme.
Basic Arithmetic Operations:
- Supports addition, subtraction, multiplication, and division.
Special Functions:
- Percentage (%), Toggle sign (+/-), Decimal point (.), Clear all (AC).
Dynamic Display:
- Shows live results during calculations.

Constructor Parameters

Parameter	Type	Default Value	Description
`backgroundColour`	Color	`Colors.white`	Background color of the calculator
`operationButtonColor`	Color	`Colors.blue`	Color of the operation buttons
`buttonColor`	Color	`Colors.white`	Color of the number buttons
`buttonTextColor`	Color	`Colors.black`	Text color for number buttons
`operationButtonTextColor`	Color	`Colors.white`	Text color for operation buttons
`resultTextColor`	Color	`Colors.black`	Text color for the display of calculation result

API Reference

`calcbutton(String btntxt, Color btncolor, Color txtcolor)`

Creates a button for the calculator.

btntxt: The text to display on the button.
btncolor: The background color of the button.
txtcolor: The text color of the button.

import 'package:flutter/material.dart';
import 'calculator.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Calculator Demo'),
        ),
        body: Calculator(
          backgroundColour: Colors.grey[200]!,
          operationButtonColor: Colors.orange,
          buttonColor: Colors.blueGrey,
          buttonTextColor: Colors.white,
          operationButtonTextColor: Colors.black,
          resultTextColor: Colors.red,
        ),
      ),
    );
  }
}

Usage Notes

Ensure you call setState() inside the calculation() method to update the UI.
The calculator supports chaining operations when using multiple operators sequentially.

License

This project is licensed under the MIT License.