|
1
31
32 package org.antlr.xjlib.appkit.gview.timer;
33
34 import org.antlr.xjlib.appkit.gview.object.GElement;
35
36 import javax.swing.*;
37 import java.awt.event.ActionEvent  ;
38 import java.awt.event.ActionListener ;
39 import java.util.ArrayList ;
40 import java.util.List ;
41
42 public class GTimer {
43
44 protected List <GElement> elements = new ArrayList <GElement>();
45
46 protected Timer timer = null;
47 protected GTimerDelegate delegate = null;
48 protected int delay = 50;
49
50 public GTimer(GTimerDelegate delegate) {
51 this.delegate = delegate;
52 }
53
54 public GTimer(GTimerDelegate delegate, int delay) {
55 this.delegate = delegate;
56 this.delay = delay;
57 }
58
59 public void setDelay(int delay) {
60 this.delay = delay;
61 }
62
63 public void refresh() {
64 if(elements.isEmpty())
65 stop();
66 else
67 start();
68 }
69
70 public void start() {
71 if(timer == null) {
72 timer = new Timer(delay, new ActionListener () {
73 public void actionPerformed(ActionEvent e) {
74 delegate.timerFired(GTimer.this);
75 }
76 });
77 timer.start();
78 } else if(!timer.isRunning()) {
79 timer.start();
80 }
81 }
82
83 public void stop() {
84 if(timer == null)
85 return;
86
87 if(timer.isRunning())
88 timer.stop();
89 }
90
91 public synchronized void add(GElement element) {
92 if(elements.contains(element))
93 return;
94
95 elements.add(element);
96 refresh();
97 }
98
99 public synchronized void remove(GElement element) {
100 elements.remove(element);
101 refresh();
102 }
103
104 public synchronized void clear() {
105 elements.clear();
106 refresh();
107 }
108
109 public synchronized boolean contains(GElement element) {
110 return elements.contains(element);
111 }
112
113 public List <GElement> getElements() {
114 return elements;
115 }
116 }
117 |
Popular Tags |
Java API By Example, From Geeks To Geeks.