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SE-3910 Real-time Systems

SE-3910 Real-time Systems. Week 7, Class 1 Announcement GStreamer – Bins Boardshots QT Swing & Qt Signals & Slots Code Example. Review? What is a C MACRO?. GUI Toolkits . Java AWT Swing C/C++ Qt FLTK GTK Motif MFC. What makes a good toolkit?. Qt Features.

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SE-3910 Real-time Systems

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  1. SE-3910Real-time Systems • Week 7, Class 1 • Announcement • GStreamer – • Bins • Boardshots • QT • Swing & Qt • Signals & Slots • Code • Example SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling, Some from Dr. Hornick, etc.

  2. Review?What is a C MACRO? SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  3. GUI Toolkits • Java • AWT • Swing • C/C++ • Qt • FLTK • GTK • Motif • MFC SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  4. What makes a good toolkit? SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  5. Qt Features • Fully object-oriented • Consistent interfaces • Rich set of widgets (controls) • Have native look and feel • Drag and drop • Customizable appearance • Utility classes • OpenGL support • Network support • Database support • Plugin support • Unicode/Internationalization support • GUI builder SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  6. Qt Widgets • Java Swing • Qt SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  7. Example QT Widgets SE3910 Real Time Systems

  8. QT Built in Dialog Boxes • File dialog • Font dialog • Color dialog • Printer dialog SE3910 Real Time Systems

  9. Layouts • Java • FlowLayout • GridLayout • GridLayout • GridLayout • BorderLayout • Qt • Flow Layout • Grid Layout • Horizontal • Vertical • Border Layout SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  10. Events/Signals • Java • Event • E.g. ActionEvent • Event Listener • E.g. ActionListener • How do you initiate an event in Java? • Qt • Signal • E.g. • Slot • E.g. on_pushButton_clicked • emit SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  11. Custom Events in Java • How do you register an event with an event source in Java? • How do you create your own event in Java? • How do you fire an event in java? SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  12. Custom Events in QT • How do you register an event with an event source in QT? connect(button, SIGNAL(clicked()), qApp, SLOT(quit())); • How do you create your own event in QT? signals: void clicked(); • How do you fire an event in QT? emit progressNotification(1000 * seconds); SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  13. Qt command-line tools… • moc – Program to convert .h files to moc_....cpp files • qmake - Program that automatically creates a makefile to run moc and gcc at the correct time SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  14. Demo – Connecting to Beaglebone • [TODO] – Perhaps another time! • I may eventually put instructions for setting up a DHCP server on your laptop using “connection sharing” on website under “Objectives” • Ask me if you don’t find it when you need it • You know my number. SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

  15. Demo – Watchdog One prompt for i in `seq 0 1000`; do echo $(($i*10)); sleep 10; done; Another cat > /dev/watchdog SE-3910 - Dr. Josiah Yoder Slide style: Dr. Hornick Much Material: Dr. Schilling

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