A simple calculator build in Flutter.

Overview

• lib/services/calculator.dart evaluates expressions using the package math_expressions.
• lib/widgets/calculator_button is a simple widget which acts as a calculator button (for operands and operators).
• lib/widget/home_screen is a StatefulWidget which deals with button presses and updating output display.
• On iOS, the launch screen is the same color as scaffoldBackgroundColor.

Remarks

• On each button press, the HomeScreen’s whole widget tree is rebuilt.
• The Align widget is really useful and isn’t something I’ve stumbled across before.

Resources

math_expressions

This post was generated from a GitHub repository.