Introduction to Qt
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1. Qt is a cross-platform application development framework written in C++ that allows developers to write once and deploy applications across desktop and mobile platforms like Windows, Mac, Linux and embedded systems. 2. Qt provides modules for user interfaces, databases, networking, multimedia and more that have a common API design. It extends C++ with macros and introspection. 3. The presentation demonstrated a simple "Hello World" Qt application and introduced Qt Creator as the IDE for Qt development. It also covered signals and slots, stylesheets, deployment and the Qt Mobility APIs for mobile.
Introduction to Qt
- 1. Developing Mobile Applicationwith QTSeminar UNRI12 May 2011Puja [email protected]://pujalabs.net
- 2. I’m home
- 4. mobile application developerThe “Big” Picture
- 5. What is Qt ?“Qt, is a cross platform development framework written in C++”
- 6. Where is Qt used?
- 7. Where is Qt used?
- 8. The Purpose of QtCross platform applications built from one source
- 9. Builds native applications with native look and feel
- 10. Easy to (re)use API, high developer productivity, openess, fun to useDesktop target platformsWindows
- 11. Mac OS X
- 12. Linux/Unix X11Embedded target platformsWindows CE
- 13. Symbian
- 14. Maemo
- 15. Embedded Linux
- 16. Direct framebuffer accessWhat is Qt?C++ framework – bindings for other languages
- 17. Python, Ruby, C#, etcetera
- 18. Original for user interfaces – now for everythingDatabases, XML, WebKit, multimedia, networking, OpenGL, scripting, non-GUI...
- 19. What is Qt?Qt is built from modules
- 20. All modules have a common scheme and are built from the same API design ideasQtCoreQtGuiQtOpenGLPhononQtXmlQtWebKitQtNetworkQtOpenVGQtXmlPatternsQtSqlQtScriptQtMultimediaQtSvg
- 21. What is Qt?Qt extends C++ with macros and introspection
- 22. All code is still plain C++foreach (int value, intList) { … }QObject *o = new QPushButton;o->metaObject()->className(); // returns ”QPushButton”connect(button, SIGNAL(clicked()), window, SLOT(close()));
- 23. Commercial and Open SourceLGPL – free
- 24. Your application can be open or closed
- 25. Changes to Qt must be fed back to the community
- 26. GPL – free
- 27. Your application must be open
- 28. Changes to Qt must be fed back to the community
- 29. Commercial – costs money
- 30. Your application can be closed
- 31. Changes to Qt can be kept closedHello World
- 32. Hello World#include <QApplication>#include <QLabel>int main( int argc, char **argv ){ QApplication app( argc, argv ); QLabel l( "Hello World!" ); l.show(); return app.exec();}
- 33. Hello World#include <QApplication>#include <QLabel>int main( int argc, char **argv ){ QApplication app( argc, argv ); QLabel l( "Hello World!" ); l.show(); return app.exec();}
- 34. Hello World#include <QApplication>#include <QLabel>int main( int argc, char **argv ){QApplication app( argc, argv ); QLabel l( "Hello World!" ); l.show(); return app.exec();}
- 35. Hello World#include <QApplication>#include <QLabel>int main( int argc, char **argv ){ QApplication app( argc, argv );QLabel l( "Hello World!" ); l.show(); return app.exec();}
- 36. Hello World#include <QApplication>#include <QLabel>int main( int argc, char **argv ){ QApplication app( argc, argv ); QLabel l( "Hello World!" ); l.show();return app.exec();}
- 37. Qt CreatorDevelopment Tools :The only IDE we need
- 38. Qt Creator
- 39. Qt Creator
- 40. PreparationChoose your platform (Windows, Mac, Linux)
- 42. Install Qt SDK. OS Comparison
- 43. DEMOGet Familiar with Qt Creator
- 45. DEMOQtStylesheet
- 48. The NEXT APIConnect with existing service
- 49. Great API for developers Qt Mobility
- 51. NFC APIOVI StoreOne place to get money
- 52. Sell your Apps
- 53. The Platform
- 54. Your Turn. Your Idea
- 55. Thank you Puja [email protected]://pujalabs.net
Editor's Notes
- #23: One simple to install package is all you need to get started. No complicated setup, just connect your devices and your environment is completeFind everything you need to go from app concept to fully tested, ready to deploy app in one place — no extra SDKs to install.Powerful, intuitive tools, such as Qt Designer and on-device debugging, will accelerate you through your development. Think it, do it, it's that easy. Whether you use Qt Designer or hand code in JavaScript-like QML, with Qt Quick you will deliver rich, interactive UIs faster than you ever thought possible.Forget long complicated programs, the power of the Qt APIs lets you do more with less. Need to know a location or send a message? The new Qt Mobility APIs are built right in. Want more customers from less coding effort? With the Qt SDK 1.1 and the power of Qt you can quickly create applications for Symbian, Maemo, and MeeGo devices.
- #24: Find out how your app will work on any Qt enabled device quickly and easily. No need for complex device emulators, just let the Qt SDK 1.1 do the workWith Qt Simulator you can create test data, including dynamic data created with scripts, and simulate device states. On-computer testing has never been so complete. Compile your Qt app to any platform from any computer. With full reporting and click-into-code compiler feedback, the Remote Compiler enables developers using Linux or Apple Mac computers to target Symbian.Symbian apps no longer need to bundle the full Qt framework within their SIS files. Smart Installer downloads Qt and Open C/C++ components as the app is installed. With signing done by the Ovi Store, distribution of Qt apps for Symbian is now even easier.
- #25: Perbedaan SDK inidapatdilihatpadagambar 3. Untukkeperluan development, penulismenyarankanpembacauntukmengunduh Nokia Qt SDK karenadidalamnyatersediaQt Simulator sehinggawalaupunkitatidakmempunyaperalatan mobile/handphonekitatetapdapatmenjalankanaplikasitersebutmelaluiQt simulator. Pembacadapatmenggunduh Nokia Qt SDK padaalamat
- #27: Deskripsiantarmuka :Mode edit : membuat, edit dannavigasikode : dilengkapidengan syntax checking, code completion,indikatorkesalahan…Mode desain : drag & drop programmingMode debug : debug,breakpoint,simulatr (maen2 di simulator,rotate)Mode proyek : add moduleBantuanBuild HelloWorld
- #28: 2. Signal & SlotEvent-based….(user,timer,network)Signal -> menandakansesuatutelahterjadiSlot -> fungsi yang dipanggilketikasuatusinyalterjadiSignal dan slot digunakanuntukberkomunikasiDEMO : halaman 53
- #29: MekanismeygmemungkinkanAndamenyesuaikantampilan widget. Konsep ,terminologidansintakssangatmiripdengan CSS
- #30: 1. pilih start->Nokia Qt SDK->Symbian->Qt for Symbian Command Prompt2. masukke folder manakakaknarofilenya..saran sayasebaiknya folder NihonGoditaro di folder NokiaQtSDK->Symbian->SDK biargaadatuhmuncul error EPOCROOT segala3. setelahituketik : qmake4. enter5. tunggubentar, hasilnyaadalahmasukke line baru6. setelahselesaiketik : make release-gcce7. enter8. trusdiprosestuhpanjangdanaga lama9. hasilnyasih line barulagi10. trusketik : make sis11. enter12. ntarada info suksesmembuat sis, namafilenyakalogasalahnihongo.sis13. trus .sis itudideploydeh di HP14. nah pas deploy ke HP janganlupa copy file qt_installer.sis & qtmobility.sisdari folder NokiaQtSDK->Symbian->sis kehapenyajuga, trus tiga2nya diinstalldeh..
- #31: 2. Signal & SlotEvent-based….(user,timer,network)Signal -> menandakansesuatutelahterjadiSlot -> fungsi yang dipanggilketikasuatusinyalterjadiSignal dan slot digunakanuntukberkomunikasiDEMO : halaman 53
- #33: The Notifications API lets you add real-time push notifications to your client applications running on Nokia devices. It includes a Service API, which provides access to the Nokia Notification Server through an HTTP REST interface, as well as a Client API, which allows applications on the device to register and receive notifications from the Nokia Notification Server. The Client API is available for Qt on Symbian and MeeGo devices.
- #37: 1.Cara pakeQt2. Signal & Slot3.