# anubhabmondal496-coder/calculator-app architecture

> Architecture diagram of the GitHub repository anubhabmondal496-coder/calculator-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-10-01). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/anubhabmondal496-coder/calculator-app
- Repository: https://github.com/anubhabmondal496-coder/calculator-app

## Overview

This is a Flutter calculator: a user enters an arithmetic expression and receives a result or a division-by-zero warning. The README documents basic arithmetic, decimals, deletion, and clear; the Dart implementation was not included in the excerpts, so internal UI-to-calculation links are shown as unverified. The remaining nodes capture sampled Linux and Windows desktop hosting code, not additional calculator logic.

Main entry points: [`windows/runner/flutter_window.cpp`](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/flutter_window.cpp) (Flutter window host), [`lib/calculator_scree.dart`](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/lib/calculator_scree.dart) (Calculator screen), [`windows/runner/win32_window.cpp`](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/win32_window.cpp) (Native window), [`windows/runner/main.cpp`](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/main.cpp) (Windows entry point)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_calculator["Calculator"]
  node_app["Flutter app entry<br/>[main.dart]"]
  node_screen["Calculator screen"]
  node_arithmetic["Calculator operations"]
end

subgraph group_linux["Linux Host"]
  node_linux_entry["Linux entry point<br/>[main.cc]"]
  node_linux_app["GTK Flutter host<br/>[my_application.cc]"]
  node_linux_header["Application interface<br/>[my_application.h]"]
end

subgraph group_windows["Windows Host"]
  node_win_entry["Windows entry point<br/>[main.cpp]"]
  node_flutter_window["Flutter window host<br/>[flutter_window.cpp]"]
  node_flutter_window_header["Flutter window interface<br/>[flutter_window.h]"]
  node_win_window["Native window<br/>[win32_window.cpp]"]
  node_win_window_header["Window interface<br/>[win32_window.h]"]
  node_win_utils["Command-line utilities<br/>[utils.cpp]"]
end

node_user(("Calculator user"))

node_user -.->|"enters input"| node_screen
node_screen -.->|"requests calculation"| node_arithmetic
node_arithmetic -.->|"returns result"| node_screen
node_linux_entry -->|"runs application"| node_linux_app
node_linux_app -->|"implements interface"| node_linux_header
node_win_entry -->|"creates window"| node_flutter_window
node_win_entry -->|"reads arguments"| node_win_utils
node_flutter_window -->|"inherits window"| node_win_window
node_flutter_window -->|"implements interface"| node_flutter_window_header
node_flutter_window -->|"hosts Flutter view"| node_win_window
node_win_window -->|"implements interface"| node_win_window_header

click node_app "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/lib/main.dart"
click node_screen "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/lib/calculator_scree.dart"
click node_arithmetic "https://github.com/anubhabmondal496-coder/calculator-app/tree/main/lib"
click node_linux_entry "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/main.cc"
click node_linux_app "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/my_application.cc"
click node_linux_header "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/my_application.h"
click node_win_entry "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/main.cpp"
click node_flutter_window "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/flutter_window.cpp"
click node_flutter_window_header "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/flutter_window.h"
click node_win_window "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/win32_window.cpp"
click node_win_window_header "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/win32_window.h"
click node_win_utils "https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/utils.cpp"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_app,node_screen,node_arithmetic,node_user toneBlue
class node_linux_entry,node_linux_app,node_linux_header toneAmber
class node_win_entry,node_flutter_window,node_flutter_window_header,node_win_window,node_win_window_header,node_win_utils toneMint
```

## Components

### Calculator

- [Flutter app entry](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/lib/main.dart): `lib/main.dart`
- [Calculator screen](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/lib/calculator_scree.dart): `lib/calculator_scree.dart`
- [Calculator operations](https://github.com/anubhabmondal496-coder/calculator-app/tree/main/lib): `lib`

### Linux Host

- [Linux entry point](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/main.cc): `linux/runner/main.cc`
- [GTK Flutter host](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/my_application.cc): `linux/runner/my_application.cc`
- [Application interface](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/linux/runner/my_application.h): `linux/runner/my_application.h`

### Windows Host

- [Windows entry point](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/main.cpp): `windows/runner/main.cpp`
- [Flutter window host](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/flutter_window.cpp): `windows/runner/flutter_window.cpp`
- [Flutter window interface](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/flutter_window.h): `windows/runner/flutter_window.h`
- [Native window](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/win32_window.cpp): `windows/runner/win32_window.cpp`
- [Window interface](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/win32_window.h): `windows/runner/win32_window.h`
- [Command-line utilities](https://github.com/anubhabmondal496-coder/calculator-app/blob/main/windows/runner/utils.cpp): `windows/runner/utils.cpp`

### Other components

- **Calculator user**

## Connections

- Calculator user → Calculator screen: enters input (evidence: `README.md`)
- Calculator screen → Calculator operations: requests calculation
- Calculator operations → Calculator screen: returns result
- Linux entry point → GTK Flutter host: runs application (evidence: `linux/runner/main.cc`)
- GTK Flutter host → Application interface: implements interface (evidence: `linux/runner/my_application.cc`)
- Windows entry point → Flutter window host: creates window (evidence: `windows/runner/main.cpp`)
- Windows entry point → Command-line utilities: reads arguments (evidence: `windows/runner/main.cpp`)
- Flutter window host → Native window: inherits window
- Flutter window host → Flutter window interface: implements interface (evidence: `windows/runner/flutter_window.cpp`)
- Flutter window host → Native window: hosts Flutter view (evidence: `windows/runner/flutter_window.cpp`)
- Native window → Window interface: implements interface (evidence: `windows/runner/win32_window.cpp`)