1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
| import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.WindowAdapter;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.SwingWorker;
import javax.swing.SwingWorker.StateValue;
public class Main {
protected static final int NB_ITER = 10000;
public static void main(String[] args) {
JFrame frame = new JFrame("Démo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new GridBagLayout());
frame.add( panel );
JButton startButton = new JButton("Lancer");
panel.add(startButton, new GridBagConstraints());
startButton.addActionListener(e-> launchTask(startButton, frame));
frame.setSize(600, 400);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private enum LoopState {
RUNNING,
PAUSE,
RESTART;
}
private static void launchTask(JButton startButton, JFrame frame) {
startButton.setEnabled(false);
Worker worker = new Worker(startButton);
ProgressDialog progressDialog = new ProgressDialog(worker);
worker.addPropertyChangeListener(progressDialog);
progressDialog.pack();
progressDialog.setSize((int)(progressDialog.getWidth()*1.5), progressDialog.getHeight());
progressDialog.setLocationRelativeTo(frame);
progressDialog.setVisible(true);
worker.execute();
}
private static class Worker extends SwingWorker<Object, Object> {
private volatile LoopState loopState;
private final JButton startButton;
public Worker(JButton startButton) {
this.startButton=startButton;
}
@Override
protected Object doInBackground() throws Exception {
boolean loop;
do {
loopState = LoopState.RUNNING;
loop=runLoop();
} while( loop );
return null;
}
private boolean runLoop() {
for(int i=0; i<NB_ITER; ) {
boolean paused=false;
switch( loopState ) {
case PAUSE:
paused=true;
synchronized(this) {
try {
wait();
} catch (InterruptedException e) {
if ( isCancelled() ) {
return false;
}
}
}
break;
case RESTART:
return true; // runLoop sera réappelé
case RUNNING:
default:
}
if ( !paused ) {
// ici on fait le travail de la boucle
try {
Thread.sleep(10); // ici je simule un travail en dormant 100ms
i++; // on incrément l'index de boucle ici
setProgress(Math.min((100*i)/NB_ITER,100));
} catch (InterruptedException e) {
}
}
}
return false;
}
public LoopState getLoopState() {
return loopState;
}
public void pause() {
this.loopState=LoopState.PAUSE;
}
public void stopPause() {
this.loopState=LoopState.RUNNING;
synchronized(this) {
this.notify();
}
}
public void restart() {
this.loopState=LoopState.RESTART;
synchronized(this) {
this.notify();
}
}
@Override
protected void done() {
super.done();
startButton.setEnabled(true);
}
}
private static class ProgressDialog extends JDialog implements PropertyChangeListener {
private JProgressBar progressBar;
private final Worker worker;
public ProgressDialog(Worker worker) {
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
this.worker=worker;
JPanel panel = new JPanel(new BorderLayout());
add(panel);
progressBar = new JProgressBar(0, 100);
progressBar.setValue(0);
progressBar.setStringPainted(true);
panel.add(progressBar);
JPanel buttonPanel = new JPanel();
panel.add(buttonPanel, BorderLayout.SOUTH);
JButton pauseButton=new JButton("Pause");
buttonPanel.add(pauseButton);
JButton restartButton=new JButton("Redémarrer");
buttonPanel.add(restartButton);
JButton stopButton=new JButton("Stop");
buttonPanel.add(stopButton);
pauseButton.addActionListener(e-> doPause(pauseButton));
restartButton.addActionListener(e-> restart(pauseButton));
stopButton.addActionListener(e-> stop());
addWindowListener(new WindowAdapter() {
public void windowClosing(java.awt.event.WindowEvent e) {
boolean running = worker.getLoopState()==LoopState.RUNNING;
if ( running ) {
doPause(pauseButton);
}
switch(JOptionPane.showConfirmDialog(ProgressDialog.this, "Tâche mise en pause.\nVoulez-vous arrêter la tâche ?", "Arrêter la tâche", JOptionPane.YES_NO_OPTION)) {
case JOptionPane.YES_OPTION:
stop();
break;
case JOptionPane.NO_OPTION:
if ( running ) {
doPause(pauseButton);
}
break;
}
};
});
}
public void propertyChange(PropertyChangeEvent evt) {
if ( "progress".equals(evt.getPropertyName()) ) {
int progress = (Integer) evt.getNewValue();
progressBar.setValue(progress);
progressBar.repaint();
}
else if ( "state".equals(evt.getPropertyName()) ){
if ( StateValue.DONE==evt.getNewValue() ) {
dispose();
}
}
}
private void stop() {
worker.cancel(true);
dispose();
}
private void restart(JButton pauseButton) {
pauseButton.setText("Pause");
worker.restart();
}
private void doPause(JButton pauseButton) {
switch( worker.getLoopState() ) {
case PAUSE:
pauseButton.setText("Pause");
worker.stopPause();
break;
case RUNNING:
pauseButton.setText("Continuer");
worker.pause();
break;
}
}
}
} |
Questions diversifié sur java
Répondre avec citation
Envoyé par Snakox
Partager