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NextButtonListener |
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1 // joi/1/lights/NextButtonListener.java 2 // 3 // 4 // Copyright 2003 Bill Campbell and Ethan Bolker 5 6 import java.awt.event.*; 7 8 /** 9 * A NextButtonListener sends a "next" message to its 10 * Sequencer each time a button to which it is listening 11 * is pressed. 12 * 13 * @version 1 14 */ 15 16 public class NextButtonListener implements ActionListener 17 { 18 private Sequencer sequencer; 19 20 /** 21 * Construct a listener that "listens for" a user's 22 * pressing the "Next" button. 23 * 24 * @param sequencer the Sequencer for the TrafficLight. 25 */ 26 27 public NextButtonListener( Sequencer sequencer ) 28 { 29 this.sequencer = sequencer; 30 } 31 32 /** 33 * The action performed when a push of the button is detected: 34 * send a next message to the Sequencer to advance it to 35 * its next state. 36 * 37 * @param event the event detected at the button. 38 */ 39 40 public void actionPerformed( ActionEvent event ) 41 { 42 this.sequencer.next(); 43 } 44 } 45
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NextButtonListener |
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