Java How to Program Fourth Edition - DCC

Chapter 12 Graphical User Interface Components: Part 1 707
45 // invoked when a JButton has been pressed
46 public void actionPerformed( ActionEvent event )
47 {
48 // place Person on first Floor
49 elevatorModel.placePersonOnFloor(
50 FIRST_FLOOR_NAME );
51
52 // disable user input
53 firstControllerButton.setEnabled( false );
54 }
55 } // end anonymous inner class
56 );
57
58 // anonymous inner class registers to receive ActionEvents
59 // from second Controller JButton
60 secondControllerButton.addActionListener(
61 new ActionListener() {
62
63 // invoked when a JButton has been pressed
64 public void actionPerformed( ActionEvent event )
65 {
66 // place Person on second Floor
67 elevatorModel.placePersonOnFloor(
68 SECOND_FLOOR_NAME );
69
70 // disable user input
71 secondControllerButton.setEnabled( false );
72 }
73 } // end anonymous inner class
74 );
75
76 // anonymous inner class enables user input on Floor if
77 // Person enters Elevator on that Floor
78 elevatorModel.addPersonMoveListener(
79 new PersonMoveListener() {
80
81 // invoked when Person has entered Elevator
82 public void personEntered(
83 PersonMoveEvent event )
84 {
85 // get Floor of departure
86 String location =
87 event.getLocation().getLocationName();
88
89 // enable first JButton if first Floor departure
90 if ( location.equals( FIRST_FLOOR_NAME ) )
91 firstControllerButton.setEnabled( true );
92
93 // enable second JButton if second Floor
94 else
95 secondControllerButton.setEnabled( true );
96
97 } // end method personEntered
Fig. Fig. 12.30 12.30 Class ElevatorController processes user input (part 2 of 3).
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