Chat App (Qt/C++)

A desktop chat application built with Qt Widgets and C++. The app includes user authentication (login/sign-up with SQLite), real-time messaging over TCP, and basic file attachment transfer.

Features

• User sign-up and login flow
• SQLite-backed user storage
• Local TCP server/client chat communication
• Public and private message sending
• File attachment send/receive support
• Basic localization setup (CN_Proj_en_US.ts)

Project Structure

• main.cpp: Application entry point and translator loading
• login.*: Login window and credential validation
• signup.*: Sign-up window and account creation
• database.*: SQLite setup and user CRUD helpers
• mainwindow.*: Chat UI, socket handling, file transfer logic
• Resources/: Qt resource files
• CN_Proj.pro: qmake project file

Prerequisites

• Qt 6 (Widgets, Network, SQL modules)
• C++ compiler supported by your Qt kit
• Qt Creator (recommended)

Build and Run

Option 1: Qt Creator (recommended)

1. Open CN_Proj.pro in Qt Creator.
2. Select a Qt 6 desktop kit.
3. Build the project.
4. Run the app.

Option 2: Terminal with qmake

qmake CN_Proj.pro
make
./CN_Proj

Note: On some systems, you may need to use qmake6 instead of qmake.

Notes

• The app stores credentials in a SQLite database file under your app data location (QStandardPaths::AppDataLocation).
• Default server/client communication currently uses TCP port 8080.

Git Hygiene

This repository includes a .gitignore configured to exclude:

• Qt build folders and generated files
• IDE user files
• Local binaries and logs
• Runtime SQLite database files

This keeps pushes lightweight and avoids uploading machine-specific build artifacts.