This presentation was made at TI Tech Days 1 Day Workshop in December 2009.

1. QT/E Workshop on TI Processors Dec 2009 Prabindh Sundareson ( [email_address] )

5. Qt License Options Commercial LGPL v. 2.1 GPL v. 3 License Cost License fee charged No cost No cost Must provide source code for changes to Qt No, modifications can be closed Source code must be provided Source code must be provided Can create proprietary application Yes—no obligation to disclose source code Yes, if dynamically linked to Qt library No, application is subject to the GPL Support Yes, with valid maintenance agreement Not included, available separately Not included, available separately Charge for Runtimes Yes—in some instances* No, distribution is royalty free No, distribution is royalty free

6. OMAP3530 Processor ARM ® Cortex ™ -A8 CPU L3/L4 Interconnect C64x+ ™ DSP and video accelerators (3525/3530 only) Peripherals Program/Data Storage System I 2 C x3 Serial Interfaces Display Subsystem Connectivity MMC/ SD/ SDIO x3 USB Host Controller x3 USB 2.0 HS OTG Controller GPMC SDRC UART x2 UART w/IRDA McBSP x5 McSPI x4 Timers GP x12 WDT x2 Image Pipe Parallel I/F Camera I/F POWERVR SGX™ Graphics (3515/3530 only) HDQ / 1-wire OMAP35x Processor 10 bit DAC Video Enc 10 bit DAC LCD Cont- roller

7. ARM9 Processors ARM9 Subsystem DSP Subsystem ARM 926EJ-S CPU 300 MHz C674x DSP Core 300 MHz Switched Central Resource (SCR) / EDMA Peripherals mDDR/ DDR2 16-bit Program/Data Storage I 2 C (2) Serial Interfaces Connectivity 64 bit WD Timer(1)/ GP Timer(3) System PWM (2) SATA UHPI USB2.0 OTG W/PHY UART (3) McASP (1) SPI (2) MMC/SD (2) L1P 16K L1D 16K L1P 32K L1D 32K L2 256K Video IN USB 1.1 W/PHY EMAC (MII/RMII) Async EMIF 16-bit LCD Controller OMAP-L138 uPP McBSP (2) 128KB RAM PDSP Subsystem 2x PDSP Core 150 MHz 4K+4K Prog 512+512 Data GPIOs GPIOs ECAP (3) EDMA3 (64ch)

9. Basics of QT

10. The QT Framework FB Cairo QT/E DirectFB Surface Managers (QScreen) X Window System/Mgrs (QWS, QPaintEngine) Application Framework (QApp, QWidget) HW Device (QScreen) QT for WinCE GDI DDr a w Win32/ Windowing System

13. Basics of QT - Widgets

16. Event Handling Flow - PaintEvent

28. QWidget and QGraphicsWidget Full modality support. Widget items do not support modality. Standard drag and drop framework. Graphics View provides a custom drag and drop framework, different from QWidget . A top-level widget's style defaults to QApplication::style A top-level item's style defaults to QGraphicsScene::style All widget attributes are supported. A subset of widget attributes are supported. QWidget is hidden by default until you call show (). The widget is already visible by default; you do not have to call show () to display the widget. QWidget uses integer geometry ( QPoint , QRect ). Coordinates and geometry are defined with qreals (doubles or floats, depending on the platform). QWidget QGraphicsWidget

38. Setting up and building QT

45. Debugging QT

50. Building a real-world UI

51. UI Building 1 – Developing an Industrial UI with QT

53. Creating a Widget

55. Creating required files HEADERS = mainwindow.h pieceslist.h puzzlewidget.h RESOURCES = puzzle.qrc SOURCES = main.cpp mainwindow.cpp pieceslist.cpp puzzlewidget.cpp # install target.path = $$[QT_INSTALL_EXAMPLES]/draganddrop/puzzle sources.files = $$SOURCES $$HEADERS $$RESOURCES *.pro *.jpg sources.path = $$[QT_INSTALL_EXAMPLES]/draganddrop/puzzle INSTALLS += target sources #include "mainwindow.h“ int main(int argc, char *argv[]) { Q_INIT_RESOURCE(puzzle); QApplication app(argc, argv); MainWindow window; window.openImage(":/images/example.jpg"); window.show(); return app.exec(); } For QT 4.6 protected: void paintEvent(QPaintEvent *event); … xamplesraganddropuzzle .pro .cpp .h

60. Performance of QT

62. Language Support in QT