1. Intro to Qt
GUI programming with C++
by Đức Phạm
Organized by
Qt is a registered product of Digia

2. Đức Phạm
 Email: inducpham@gmail.com
 Bachelor of IT since 2009
 Linux enthusiast
 Worked in Gameloft and now is East Agile
 Interest in Game and Web development

3. History
 Developed by Trolltech
 Acquired by Nokia
 Commercial license took over by Digia

4. In a nutshell
 Qt is ‘cute’
 Cross-platform GUI library for the C++
programming language
 A complete interface environment with support
for Webkit API, media streamer, file system
browser, OpenGL API, etc.

5. VLC 2.x running in
Windows, OS X 10.7
and Debian Linux

6. In a nutshell (continue)
 Support embedded Linux
 Smart phones: Maemo, Meego, etc.
 Electronic devices: Car, TV, etc.
 Feature road map including support for
popular mobile platforms such as
Android and iOS.

7. Legal stuff
 Qt offers three licenses:
 GPL v3
 lGPL
 Digia commercial license

8. Installation
 Official download: http://qt-project.org/downloads
 Official IDE: QtCreator
 Visual Studio add-in
 Debian repository:
 sudo apt-get install qtcreator qtcreator-dbg

9. Technical features
 Customized precompiler: signal and slot

10. Technical features (continue)
 Signals don’t need to be implemented, but
rather called
 Signals and slots can be connected:
 Regardless of which object
 Many-many relationship
 Could be disconnected

11. Technical features (continue)
Features the parent-child relationship
 A child widget when created could reference to
a parent widget. This allows:
 Hierarchy search: findChild() and
findChildren()
 Chain destructor on parent de-allocating

12. Tech demo

13. Qt in the world
 Industrial
 Skype
 VirtualBox
 Maya
 Opera
 Various embedded software

14. Qt in the world (continue)
KDE
 Complete desktop environment in Qt
 Including the Plasma Window manager
 Projects including Office Applications
 Development suite: Kdevelop
 Common desktop applications

15. Qt in the world (continue)
Open source projects
 Qt razor
http://qt-apps.org/

16. Further references
 http://qt-project.org/doc/qt-4.8/
 http://www.youtube.com/user/VoidRealms
 http://www.kde.org/developerplatform/
 http://qt-apps.org/

17. Questions?

18. Thank you!