cedric-song/flutter_calculator

Build a calculator app in iOS and Android with the same code by using flutter.

flutter_calculator

Preview

Structure

Input Widgets

input widgets is all extends StatefulWidget, because they need to response the onTap gesture.

• NumberButton. Rendering the number button (like 1,2,3...) and handling the onTap gesture.

• OperatorButton. Rendering the operator button (like +,-,*...) and handling the onTap gesture.

• ResultButton. Rendering the command button (like clear,equal...) and handling the onTap gesture.

Output Widgets

output widgets is all extends StatelessWidget, because they are just rendering.

• ResultDisplay. Rendering the current result and changing display when user tap a number button.

• HistoryBlock. Rendering the calculation histories and changing display every time when user tap a valid button.

CalculatorPage

CalculatorPage is extends StatefulWidget and holding the List of result.

CalculatorPage receives every input widgets onTap event, makes a logical calculation for these input and decide what to display to output widgets.

Thanks

This repo is inspired by react-calculator.

Thanks to the author's awesome idea and app ui.

Contact

[email protected]