Desktop Apps with Qt Widgets and C++

Understand how memory works in C++ and Qt. Learn the difference between heap and stack, use smart pointers to prevent memory leaks, and master Qt's parent-child ownership model that makes memory management almost automatic.

Master Qt's powerful communication mechanism. Connect widgets, respond to user actions, and build reactive interfaces using signals, slots, and lambdas. Practice with real projects including a Calory Counter app.

Get hands-on with every essential Qt widget. From buttons and text fields to layouts and tab systems — you'll learn how to combine 18+ widget types into polished, professional user interfaces with proper sizing and spacing.

Build professional dialog windows that your users expect. Master file pickers, font selectors, color choosers, input dialogs, and custom dialog boxes with proper button layouts and return values.

Embed images, icons, and files directly into your application binary. Learn Qt's resource system so your apps ship as a single executable with no missing assets — ever.

Transform plain widgets into stunning interfaces. Master QPalette for system-level theming and Qt Stylesheets (CSS for Qt) for pixel-perfect visual customization — inline and from external files.

Save and restore user preferences across sessions. Learn QSettings to persist window positions, theme choices, and any custom settings — so your app remembers how users like it.

Read, write, and manage files and directories with Qt's cross-platform APIs. Handle text files, binary data, and directory operations that work identically on Windows, Linux, and Mac.

Connect your desktop apps to the internet. Make HTTP requests, consume REST APIs, parse JSON responses, and build a complete HTTP client that communicates with web services.

Take full control of user interaction. Understand Qt's event system from top to bottom — handle mouse clicks, key presses, custom events, event filters, and propagation chains like a pro.

Add professional drag-and-drop interactions to your apps. Transfer data between widgets, handle dropped images, work with the system clipboard, and integrate it all into your PainterApp project.

Master Qt's most powerful data display framework. Build custom models, editable views, delegates with star ratings, tree structures, and a complete Expense Tracker with SQLite — the skills that separate juniors from seniors.

Transform your PainterApp from a prototype into a polished, production-ready application. Add pen/brush property panels, a color picker, custom tool cursors, copy/cut/paste with data serialization, document save/load, and full undo/redo — exactly how professional apps are built.

Make your app speak every language. Learn Qt's full internationalization pipeline — prepare strings for translation, use Qt Linguist, generate translation files, and let users switch languages at runtime with their preference saved.

Give your application a professional identity. Set up application icons that display correctly in the taskbar, window title, and desktop — the finishing touch that makes your app look production-ready.

Ship your application to real users. Master deployment on Windows (windeployqt + Qt Installer Framework), Linux (linuxdeployqt + installer), and Mac — so your app installs cleanly on any machine without requiring Qt to be installed.

You've built a rock-solid foundation. Now discover what to learn next, which advanced Qt topics to explore, and how to continue growing as a professional Qt developer.