SD2054 Software Development

1. SD2054 Software Development

3. Advanced Graphics Programming By the end of this lecture you should be able to: • create pull downmenus • create combo boxes • create option dialogues • create message dialogues • create input dialogues • create confirm dialogues.

4. import javax.swing.*;

5. Making choices pull-down menus combo boxes

6. Pull-down menus

7. Pull-down menus

8. Pull-down menus

9. Pull-down menus

10. Pull-down menus

11. Pull-down menus

12. Pull-down menus JFrame

13. public class Flag extends JFrame implementsActionListener { } JFrame

14. Declare menu components as attributes of the Flag class

16. JMenuBar

17. private JMenuBar bar = new JMenuBar(); JMenuBar

19. JMenu

20. private JMenu topStripeMenu = new JMenu("Top Colour"); JMenu

21. JMenu

22. private JMenu middleStripeMenu = new JMenu(“Middle Colour"); JMenu

23. JMenu

24. private JMenu bottomStripeMenu = new JMenu(“Bottom Colour"); JMenu

26. JMenuItem

27. private JMenuItem blueStripe = new JMenuItem("Blue"); JMenuItem

28. JMenuItem

29. private JMenuItem redStripe = new JMenuItem(“Red"); JMenuItem

30. Assemble menu components onto the screen in the Constructor

31. public Flag( ) { setVisible(true); }

32. First, add menu-items …..

33. … to menu

34. blueStripe

35. topStripeMenu blueStripe

36. topStripeMenu.add(blueStripe); topStripeMenu blueStripe

37. topStripeMenu redStripe

38. topStripeMenu.add(redStripe); topStripeMenu redStripe

39. Then, add menu …..

40. … to menu-bar

41. bar

42. topStripeMenu bar

43. bar.add(topStripeMenu); topStripeMenu bar

44. Finally, add menu-bar …..

45. …. to frame

46. bar

47. setJMenuBar(bar); bar

48. Processing menu choices…..

49. ..first, give each menu item a listener in the constructor.

50. blueStripe