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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [java/] [awt/] [Dialog.java] - Blame information for rev 771

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1 771 jeremybenn
/* Dialog.java -- An AWT dialog box
2
 Copyright (C) 1999, 2000, 2001, 2002, 2005, 2006
3
 Free Software Foundation, Inc.
4
 
5
 This file is part of GNU Classpath.
6
 
7
 GNU Classpath is free software; you can redistribute it and/or modify
8
 it under the terms of the GNU General Public License as published by
9
 the Free Software Foundation; either version 2, or (at your option)
10
 any later version.
11
 
12
 GNU Classpath is distributed in the hope that it will be useful, but
13
 WITHOUT ANY WARRANTY; without even the implied warranty of
14
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 General Public License for more details.
16
 
17
 You should have received a copy of the GNU General Public License
18
 along with GNU Classpath; see the file COPYING.  If not, write to the
19
 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20
 02110-1301 USA.
21
 
22
 Linking this library statically or dynamically with other modules is
23
 making a combined work based on this library.  Thus, the terms and
24
 conditions of the GNU General Public License cover the whole
25
 combination.
26
 
27
 As a special exception, the copyright holders of this library give you
28
 permission to link this library with independent modules to produce an
29
 executable, regardless of the license terms of these independent
30
 modules, and to copy and distribute the resulting executable under
31
 terms of your choice, provided that you also meet, for each linked
32
 independent module, the terms and conditions of the license of that
33
 module.  An independent module is a module which is not derived from
34
 or based on this library.  If you modify this library, you may extend
35
 this exception to your version of the library, but you are not
36
 obligated to do so.  If you do not wish to do so, delete this
37
 exception statement from your version. */
38
 
39
 
40
package java.awt;
41
 
42
import java.awt.peer.DialogPeer;
43
 
44
import javax.accessibility.AccessibleContext;
45
import javax.accessibility.AccessibleRole;
46
import javax.accessibility.AccessibleState;
47
import javax.accessibility.AccessibleStateSet;
48
 
49
/**
50
 * <code>Dialog</code> provides a top-level window normally used to receive
51
 * user input in applications.
52
 * <p>
53
 * A dialog always has another top-level window as owner and is only visible
54
 * if this owner is visible to the user. The default layout of dialogs is the
55
 * <code>BorderLayout</code>. Dialogs can be modal (blocks user input to other
56
 * components) or non-modal (user input in other components are allowed).
57
 * </p>
58
 *
59
 * @author Aaron M. Renn (arenn@urbanophile.com)
60
 * @author Tom Tromey (tromey@redhat.com)
61
 */
62
public class Dialog extends Window
63
{
64
  public enum ModalExclusionType
65
  {
66
    APPLICATION_EXCLUDE,
67
    NO_EXCLUDE,
68
    TOOLKIT_EXCLUDE
69
  }
70
 
71
  public enum ModalityType
72
  {
73
    APPLICATION_MODAL,
74
    DOCUMENT_MODAL,
75
    MODELESS,
76
    TOOLKIT_MODAL
77
  }
78
 
79
  // Serialization constant
80
  private static final long serialVersionUID = 5920926903803293709L;
81
 
82
  /**
83
   * @serial Indicates whether or not this dialog box is modal.
84
   */
85
  private boolean modal;
86
 
87
  /**
88
   * @serial Indicates whether or not this dialog box is resizable.
89
   */
90
  private boolean resizable = true;
91
 
92
  /**
93
   * @serial The title string for this dialog box, which can be
94
   *         <code>null</code>.
95
   */
96
  private String title;
97
 
98
  /**
99
   * This field indicates whether the dialog is undecorated or not.
100
   */
101
  private boolean undecorated = false;
102
 
103
  /**
104
   * Indicates that we are blocked for modality in show
105
   */
106
  private boolean blocked = false;
107
 
108
  /**
109
   * Secondary EventQueue to handle AWT events while we are blocked for
110
   * modality in show.
111
   */
112
  private EventQueue eq2 = null;
113
 
114
  /**
115
   * The number used to generate the name returned by getName.
116
   */
117
  private static transient long next_dialog_number;
118
 
119
  /**
120
   * Initializes a new instance of <code>Dialog</code> with the specified
121
   * parent, that is resizable and not modal, and which has no title.
122
   *
123
   * @param parent The parent frame of this dialog box.
124
   * @exception IllegalArgumentException If the owner's GraphicsConfiguration
125
   * is not from a screen device, or if owner is null. This exception is
126
   * always thrown when GraphicsEnvironment.isHeadless() returns true.
127
   */
128
  public Dialog(Frame parent)
129
  {
130
    this(parent, "", false);
131
  }
132
 
133
  /**
134
   * Initializes a new instance of <code>Dialog</code> with the specified
135
   * parent and modality, that is resizable and which has no title.
136
   *
137
   * @param parent The parent frame of this dialog box.
138
   * @param modal <code>true</code> if this dialog box is modal,
139
   * <code>false</code> otherwise.
140
   *
141
   * @exception IllegalArgumentException If the owner's GraphicsConfiguration
142
   * is not from a screen device, or if owner is null. This exception is
143
   * always thrown when GraphicsEnvironment.isHeadless() returns true.
144
   */
145
  public Dialog(Frame parent, boolean modal)
146
  {
147
    this(parent, "", modal);
148
  }
149
 
150
  /**
151
   * Initializes a new instance of <code>Dialog</code> with the specified
152
   * parent, that is resizable and not modal, and which has the specified
153
   * title.
154
   *
155
   * @param parent The parent frame of this dialog box.
156
   * @param title The title string for this dialog box.
157
   *
158
   * @exception IllegalArgumentException If the owner's GraphicsConfiguration
159
   * is not from a screen device, or if owner is null. This exceptionnis
160
   * always thrown when GraphicsEnvironment.isHeadless() returns true.
161
   */
162
  public Dialog(Frame parent, String title)
163
  {
164
    this(parent, title, false);
165
  }
166
 
167
  /**
168
   * Initializes a new instance of <code>Dialog</code> with the specified,
169
   * parent, title, and modality, that is resizable.
170
   *
171
   * @param parent The parent frame of this dialog box.
172
   * @param title The title string for this dialog box.
173
   * @param modal <code>true</code> if this dialog box is modal,
174
   * <code>false</code> otherwise.
175
   *
176
   * @exception IllegalArgumentException If owner is null or
177
   *              GraphicsEnvironment.isHeadless() returns true.
178
   */
179
  public Dialog(Frame parent, String title, boolean modal)
180
  {
181
    this(parent, title, modal, parent.getGraphicsConfiguration());
182
  }
183
 
184
  /**
185
   * Initializes a new instance of <code>Dialog</code> with the specified,
186
   * parent, title, modality and <code>GraphicsConfiguration</code>, that is
187
   * resizable.
188
   *
189
   * @param parent The parent frame of this dialog box.
190
   * @param title The title string for this dialog box.
191
   * @param modal <code>true</code> if this dialog box is modal,
192
   * <code>false</code> otherwise.
193
   * @param gc The <code>GraphicsConfiguration</code> object to use. If
194
   * <code>null</code> the <code>GraphicsConfiguration</code> of the target
195
   * frame is used.
196
   *
197
   * @exception IllegalArgumentException If owner is null, the
198
   *              GraphicsConfiguration is not a screen device or
199
   *              GraphicsEnvironment.isHeadless() returns true.
200
   * @since 1.4
201
   */
202
  public Dialog(Frame parent, String title, boolean modal,
203
                GraphicsConfiguration gc)
204
  {
205
    super(parent, (gc == null) ? parent.getGraphicsConfiguration() : gc);
206
 
207
    // A null title is equivalent to an empty title
208
    this.title = (title != null) ? title : "";
209
    this.modal = modal;
210
    visible = false;
211
 
212
    setLayout(new BorderLayout());
213
    setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
214
  }
215
 
216
  /**
217
   * Initializes a new instance of <code>Dialog</code> with the specified,
218
   * parent, that is resizable.
219
   *
220
   * @param owner The parent frame of this dialog box.
221
   *
222
   * @exception IllegalArgumentException If parent is null. This exception is
223
   * always thrown when GraphicsEnvironment.isHeadless() returns true.
224
   *
225
   * @since 1.2
226
   */
227
  public Dialog(Dialog owner)
228
  {
229
    this(owner, "", false, owner.getGraphicsConfiguration());
230
  }
231
 
232
  /**
233
   * Initializes a new instance of <code>Dialog</code> with the specified,
234
   * parent and title, that is resizable.
235
   *
236
   * @param owner The parent frame of this dialog box.
237
   * @param title The title string for this dialog box.
238
   *
239
   * @exception IllegalArgumentException If parent is null. This exception is
240
   *              always thrown when GraphicsEnvironment.isHeadless() returns
241
   *              true.
242
   * @since 1.2
243
   */
244
  public Dialog(Dialog owner, String title)
245
  {
246
    this(owner, title, false, owner.getGraphicsConfiguration());
247
  }
248
 
249
  /**
250
   * Initializes a new instance of <code>Dialog</code> with the specified,
251
   * parent, title and modality, that is resizable.
252
   *
253
   * @param owner The parent frame of this dialog box.
254
   * @param title The title string for this dialog box.
255
   * @param modal <code>true</code> if this dialog box is modal,
256
   * <code>false</code> otherwise.
257
   *
258
   * @exception IllegalArgumentException If parent is null. This exception is
259
   * always thrown when GraphicsEnvironment.isHeadless() returns true.
260
   * @since 1.2
261
   */
262
  public Dialog(Dialog owner, String title, boolean modal)
263
  {
264
    this(owner, title, modal, owner.getGraphicsConfiguration());
265
  }
266
 
267
  /**
268
   * Initializes a new instance of <code>Dialog</code> with the specified,
269
   * parent, title, modality and <code>GraphicsConfiguration</code>, that is
270
   * resizable.
271
   *
272
   * @param parent The parent frame of this dialog box.
273
   * @param title The title string for this dialog box.
274
   * @param modal <code>true</code> if this dialog box is modal,
275
   * <code>false</code> otherwise.
276
   * @param gc The <code>GraphicsConfiguration</code> object to use. If
277
   * <code>null</code> the <code>GraphicsConfiguration</code> of the target
278
   * frame is used.
279
   *
280
   * @exception IllegalArgumentException If parent is null, the
281
   * GraphicsConfiguration is not a screen device or
282
   * GraphicsEnvironment.isHeadless() returns true.
283
   *
284
   * @since 1.4
285
   */
286
  public Dialog(Dialog parent, String title, boolean modal,
287
                GraphicsConfiguration gc)
288
  {
289
    super(parent, (gc == null) ? parent.getGraphicsConfiguration() : gc);
290
 
291
    // A null title is equivalent to an empty title
292
    this.title = (title != null) ? title : "";
293
    this.modal = modal;
294
    visible = false;
295
 
296
    setLayout(new BorderLayout());
297
    setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
298
  }
299
 
300
  /**
301
   * Returns the title of this dialog box.
302
   *
303
   * @return The title of this dialog box.
304
   */
305
  public String getTitle()
306
  {
307
    return title;
308
  }
309
 
310
  /**
311
   * Sets the title of this dialog box to the specified string.
312
   *
313
   * @param title the new title. If <code>null</code> an empty
314
   * title will be set.
315
   */
316
  public synchronized void setTitle(String title)
317
  {
318
    // A null title is equivalent to an empty title
319
    this.title = (title != null) ? title : "";
320
 
321
    if (peer != null)
322
      {
323
        DialogPeer d = (DialogPeer) peer;
324
        d.setTitle(title);
325
      }
326
  }
327
 
328
  /**
329
   * Tests whether or not this dialog box is modal.
330
   *
331
   * @return <code>true</code> if this dialog box is modal, <code>false</code>
332
   * otherwise.
333
   */
334
  public boolean isModal()
335
  {
336
    return modal;
337
  }
338
 
339
  /**
340
   * Changes the modality of this dialog box. This can only be done before the
341
   * peer is created.
342
   *
343
   * @param modal <code>true</code> to make this dialog box modal,
344
   * <code>false</code> to make it non-modal.
345
   */
346
  public void setModal(boolean modal)
347
  {
348
    this.modal = modal;
349
  }
350
 
351
  /**
352
   * Tests whether or not this dialog box is resizable.
353
   *
354
   * @return <code>true</code> if this dialog is resizable,
355
   * <code>false</code> otherwise.
356
   */
357
  public boolean isResizable()
358
  {
359
    return resizable;
360
  }
361
 
362
  /**
363
   * Changes the resizability of this dialog box.
364
   *
365
   * @param resizable <code>true</code> to make this dialog resizable,
366
   * <code>false</code> to make it non-resizable.
367
   */
368
  public synchronized void setResizable(boolean resizable)
369
  {
370
    this.resizable = resizable;
371
    if (peer != null)
372
      {
373
        DialogPeer d = (DialogPeer) peer;
374
        d.setResizable(resizable);
375
      }
376
  }
377
 
378
  /**
379
   * Creates this object's native peer.
380
   */
381
  public synchronized void addNotify()
382
  {
383
    if (peer == null)
384
      peer = getToolkit().createDialog(this);
385
    super.addNotify();
386
  }
387
 
388
  /**
389
   * Makes this dialog visible and brings it to the front. If the dialog is
390
   * modal and is not already visible, this call will not return until the
391
   * dialog is hidden by someone calling hide or dispose. If this is the event
392
   * dispatching thread we must ensure that another event thread runs while the
393
   * one which invoked this method is blocked.
394
   *
395
   * @deprecated Use {@link Component#setVisible(boolean)} instead.
396
   */
397
  public synchronized void show()
398
  {
399
    super.show();
400
 
401
    if (isModal())
402
      {
403
        // If already shown (and blocked) just return
404
        if (blocked)
405
          return;
406
 
407
        /*
408
         * If show is called in the dispatch thread for a modal dialog it will
409
         * block so we must run another thread so the events keep being
410
         * dispatched.
411
         */
412
        if (EventQueue.isDispatchThread())
413
          {
414
            EventQueue eq = Toolkit.getDefaultToolkit().getSystemEventQueue();
415
            eq2 = new EventQueue();
416
            eq.push(eq2);
417
          }
418
 
419
        try
420
          {
421
            blocked = true;
422
            wait();
423
            blocked = false;
424
          }
425
        catch (InterruptedException e)
426
          {
427
            blocked = false;
428
          }
429
 
430
        if (eq2 != null)
431
          {
432
            eq2.pop();
433
            eq2 = null;
434
          }
435
      }
436
  }
437
 
438
  /**
439
   * Hides the Dialog and then causes show() to return if it is currently
440
   * blocked.
441
   *
442
   * @deprecated Use {@link Component#setVisible(boolean)} instead.
443
   */
444
  public synchronized void hide()
445
  {
446
    if (blocked)
447
      {
448
        notifyAll();
449
      }
450
 
451
    super.hide();
452
  }
453
 
454
  /**
455
   * Disposes the Dialog and then causes show() to return if it is currently
456
   * blocked.
457
   */
458
  public synchronized void dispose()
459
  {
460
    if (blocked)
461
      {
462
        notifyAll();
463
      }
464
 
465
    super.dispose();
466
  }
467
 
468
  /**
469
   * Returns a debugging string for this component.
470
   *
471
   * @return A debugging string for this component.
472
   */
473
  protected String paramString()
474
  {
475
    return "title+" + title + ",modal=" + modal + ",resizable=" + resizable
476
            + "," + super.paramString();
477
  }
478
 
479
  /**
480
   * Returns whether this frame is undecorated or not.
481
   *
482
   * @return <code>true</code> if this dialog is undecorated,
483
   * <code>false</code> otherwise.
484
   *
485
   * @since 1.4
486
   */
487
  public boolean isUndecorated()
488
  {
489
    return undecorated;
490
  }
491
 
492
  /**
493
   * Disables or enables decorations for this frame. This method can only be
494
   * called while the frame is not displayable.
495
   *
496
   * @param undecorated <code>true</code> to disable dialog decorations,
497
   * <code>false</code> otherwise.
498
   *
499
   * @exception IllegalComponentStateException If this frame is displayable.
500
   * @since 1.4
501
   */
502
  public void setUndecorated(boolean undecorated)
503
  {
504
    if (isDisplayable())
505
      throw new IllegalComponentStateException();
506
 
507
    this.undecorated = undecorated;
508
  }
509
 
510
  /**
511
   * Accessibility support for <code>Dialog</code>.
512
   */
513
  protected class AccessibleAWTDialog
514
      extends AccessibleAWTWindow
515
  {
516
    private static final long serialVersionUID = 4837230331833941201L;
517
 
518
    /**
519
     * Gets the role of this object.
520
     * @return AccessibleRole.DIALOG
521
     */
522
    public AccessibleRole getAccessibleRole()
523
    {
524
      return AccessibleRole.DIALOG;
525
    }
526
 
527
    /**
528
     * Gets the state set of this object.
529
     * @return The current state of this dialog.
530
     */
531
    public AccessibleStateSet getAccessibleStateSet()
532
    {
533
      AccessibleStateSet states = super.getAccessibleStateSet();
534
      if (isResizable())
535
        states.add(AccessibleState.RESIZABLE);
536
      if (isModal())
537
        states.add(AccessibleState.MODAL);
538
      return states;
539
    }
540
  }
541
 
542
  /**
543
   * Gets the AccessibleContext associated with this <code>Dialog</code>. The
544
   * context is created, if necessary.
545
   *
546
   * @return the associated context
547
   */
548
  public AccessibleContext getAccessibleContext()
549
  {
550
    /* Create the context if this is the first request */
551
    if (accessibleContext == null)
552
      accessibleContext = new AccessibleAWTDialog();
553
    return accessibleContext;
554
  }
555
 
556
  /**
557
   * Generate a unique name for this <code>Dialog</code>.
558
   *
559
   * @return A unique name for this <code>Dialog</code>.
560
   */
561
  String generateName()
562
  {
563
    return "dialog" + getUniqueLong();
564
  }
565
 
566
  private static synchronized long getUniqueLong()
567
  {
568
    return next_dialog_number++;
569
  }
570
}

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