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
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
|
/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.cocoa.*;
/**
* Instances of this class represent a selectable user interface object that
* issues notification when pressed and released.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>ARROW, CHECK, PUSH, RADIO, TOGGLE, FLAT</dd>
* <dd>UP, DOWN, LEFT, RIGHT, CENTER</dd>
* <dt><b>Events:</b></dt>
* <dd>Selection</dd>
* </dl>
* <p>
* Note: Only one of the styles ARROW, CHECK, PUSH, RADIO, and TOGGLE
* may be specified.
* </p><p>
* Note: Only one of the styles LEFT, RIGHT, and CENTER may be specified.
* </p><p>
* Note: Only one of the styles UP, DOWN, LEFT, and RIGHT may be specified
* when the ARROW style is specified.
* </p><p>
* IMPORTANT: This class is intended to be subclassed <em>only</em>
* within the SWT implementation.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#button">Button snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Button extends Control {
String text;
Image image;
boolean grayed;
static final int EXTRA_HEIGHT = 2;
static final int EXTRA_WIDTH = 6;
static final int IMAGE_GAP = 2;
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a composite control which will be the parent of the new instance (cannot be null)
* @param style the style of control to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
* </ul>
*
* @see SWT#ARROW
* @see SWT#CHECK
* @see SWT#PUSH
* @see SWT#RADIO
* @see SWT#TOGGLE
* @see SWT#FLAT
* @see SWT#UP
* @see SWT#DOWN
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Button (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the control is selected by the user, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* <code>widgetSelected</code> is called when the control is selected by the user.
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Selection,typedListener);
addListener(SWT.DefaultSelection,typedListener);
}
NSSize cellSize (int /*long*/ id, int /*long*/ sel) {
NSSize size = super.cellSize(id, sel);
if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) {
NSSize imageSize = image.handle.size();
size.width += imageSize.width + IMAGE_GAP;
size.height = Math.max(size.height, imageSize.height);
}
return size;
}
static int checkStyle (int style) {
style = checkBits (style, SWT.PUSH, SWT.ARROW, SWT.CHECK, SWT.RADIO, SWT.TOGGLE, 0);
if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) {
return checkBits (style, SWT.CENTER, SWT.LEFT, SWT.RIGHT, 0, 0, 0);
}
if ((style & (SWT.CHECK | SWT.RADIO)) != 0) {
return checkBits (style, SWT.LEFT, SWT.RIGHT, SWT.CENTER, 0, 0, 0);
}
if ((style & SWT.ARROW) != 0) {
style |= SWT.NO_FOCUS;
return checkBits (style, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, 0, 0);
}
return style;
}
void click () {
sendSelectionEvent (SWT.Selection);
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
if ((style & SWT.ARROW) != 0) {
// TODO use some OS metric instead of hardcoded values
int width = wHint != SWT.DEFAULT ? wHint : 14;
int height = hHint != SWT.DEFAULT ? hHint : 14;
return new Point (width, height);
}
NSSize size = ((NSButton)view).cell ().cellSize ();
int width = (int)Math.ceil (size.width);
int height = (int)Math.ceil (size.height);
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & SWT.FLAT) == 0) {
if (display.smallFonts) height += EXTRA_HEIGHT;
width += EXTRA_WIDTH;
}
return new Point (width, height);
}
NSAttributedString createString() {
NSAttributedString attribStr = createString(text, null, foreground, style, false, true, true);
attribStr.autorelease();
return attribStr;
}
void createHandle () {
if ((style & SWT.PUSH) == 0) state |= THEME_BACKGROUND;
NSButton widget = (NSButton)new SWTButton().alloc();
widget.init();
/*
* Feature in Cocoa. Images touch the edge of rounded buttons
* when set to small size. The fix to subclass the button cell
* and offset the image drawing.
*/
// if (display.smallFonts && (style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & SWT.FLAT) == 0) {
NSButtonCell cell = (NSButtonCell)new SWTButtonCell ().alloc ().init ();
widget.setCell (cell);
cell.release ();
// }
int type = OS.NSMomentaryLightButton;
if ((style & SWT.PUSH) != 0) {
boolean flat = (style & SWT.FLAT) != 0;
if (!flat) {
NSView superview = widget.superview();
while (superview != null) {
if (superview.isKindOfClass(OS.class_NSTableView)) {
flat = true;
break;
}
superview = superview.superview();
}
}
if (flat) {
widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle);
// if ((style & SWT.BORDER) == 0) widget.setShowsBorderOnlyWhileMouseInside(true);
} else {
widget.setBezelStyle(OS.NSRoundedBezelStyle);
}
} else if ((style & SWT.CHECK) != 0) {
type = OS.NSSwitchButton;
} else if ((style & SWT.RADIO) != 0) {
type = OS.NSRadioButton;
} else if ((style & SWT.TOGGLE) != 0) {
type = OS.NSPushOnPushOffButton;
if ((style & SWT.FLAT) != 0) {
widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle);
// if ((style & SWT.BORDER) == 0) widget.setShowsBorderOnlyWhileMouseInside(true);
} else {
widget.setBezelStyle(OS.NSRoundedBezelStyle);
}
} else if ((style & SWT.ARROW) != 0) {
widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle);
}
widget.setButtonType(type);
widget.setTitle(NSString.string());
widget.setImagePosition(OS.NSImageLeft);
widget.setTarget(widget);
widget.setAction(OS.sel_sendSelection);
view = widget;
_setAlignment(style);
}
void createWidget() {
text = "";
super.createWidget ();
}
NSFont defaultNSFont() {
return display.buttonFont;
}
void deregister () {
super.deregister ();
display.removeWidget(((NSControl)view).cell());
}
boolean dragDetect(int x, int y, boolean filter, boolean[] consume) {
boolean dragging = super.dragDetect(x, y, filter, consume);
consume[0] = dragging;
return dragging;
}
void drawImageWithFrameInView (int /*long*/ id, int /*long*/ sel, int /*long*/ image, NSRect rect, int /*long*/ view) {
/*
* Feature in Cocoa. Images touch the edge of rounded buttons
* when set to small size. The fix to subclass the button cell
* and offset the image drawing.
*/
if (display.smallFonts && (style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & SWT.FLAT) == 0) {
rect.y += EXTRA_HEIGHT / 2;
rect.height += EXTRA_HEIGHT;
}
callSuper (id, sel, image, rect, view);
}
void drawInteriorWithFrame_inView (int /*long*/ id, int /*long*/ sel, NSRect cellRect, int /*long*/ viewid) {
if ((style & (SWT.CHECK|SWT.RADIO)) != 0 && backgroundImage != null) {
fillBackground (new NSView(viewid), NSGraphicsContext.currentContext(), cellRect, -1);
}
super.drawInteriorWithFrame_inView(id, sel, cellRect, viewid);
if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) {
NSSize imageSize = image.handle.size();
NSCell nsCell = new NSCell(id);
float /*double*/ x = 0;
float /*double*/ y = (imageSize.height - cellRect.height)/2f;
NSRect imageRect = nsCell.imageRectForBounds(cellRect);
NSSize stringSize = ((NSButton)view).attributedTitle().size();
switch (style & (SWT.LEFT|SWT.RIGHT|SWT.CENTER)) {
case SWT.LEFT:
x = imageRect.x + imageRect.width + IMAGE_GAP;
break;
case SWT.CENTER:
x = cellRect.x + imageRect.x + imageRect.width + ((cellRect.width-stringSize.width)/2f) - imageSize.width - IMAGE_GAP;
break;
case SWT.RIGHT:
x = cellRect.x + cellRect.width - stringSize.width - imageSize.width - IMAGE_GAP;
break;
}
NSRect destRect = new NSRect();
destRect.x = x;
destRect.y = y;
destRect.width = imageSize.width;
destRect.height = imageSize.height;
NSGraphicsContext.static_saveGraphicsState();
NSAffineTransform transform = NSAffineTransform.transform();
transform.scaleXBy(1, -1);
transform.translateXBy(0, -imageSize.height);
transform.concat();
image.handle.drawInRect(destRect, new NSRect(), OS.NSCompositeSourceOver, 1);
NSGraphicsContext.static_restoreGraphicsState();
}
}
void drawWidget (int /*long*/ id, NSGraphicsContext context, NSRect rect) {
if ((style & SWT.ARROW) != 0) {
NSRect frame = view.frame();
int arrowSize = Math.min((int)frame.height, (int)frame.width) / 2;
context.saveGraphicsState();
NSPoint p1 = new NSPoint();
p1.x = -arrowSize / 2;
p1.y = -arrowSize / 2;
NSPoint p2 = new NSPoint();
p2.x = arrowSize / 2;
p2.y = p1.y;
NSPoint p3 = new NSPoint();
p3.y = arrowSize / 2;
NSBezierPath path = NSBezierPath.bezierPath();
path.moveToPoint(p1);
path.lineToPoint(p2);
path.lineToPoint(p3);
path.closePath();
NSAffineTransform transform = NSAffineTransform.transform();
if ((style & SWT.LEFT) != 0) {
transform.rotateByDegrees(90);
} else if ((style & SWT.UP) != 0) {
transform.rotateByDegrees(180);
} else if ((style & SWT.RIGHT) != 0) {
transform.rotateByDegrees(-90);
}
path.transformUsingAffineTransform(transform);
transform = NSAffineTransform.transform();
transform.translateXBy(frame.width / 2, frame.height / 2);
path.transformUsingAffineTransform(transform);
NSColor color = isEnabled() ? NSColor.blackColor() : NSColor.disabledControlTextColor();
color.set();
path.fill();
context.restoreGraphicsState();
}
super.drawWidget (id, context, rect);
}
/**
* Returns a value which describes the position of the
* text or image in the receiver. The value will be one of
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
* unless the receiver is an <code>ARROW</code> button, in
* which case, the alignment will indicate the direction of
* the arrow (one of <code>LEFT</code>, <code>RIGHT</code>,
* <code>UP</code> or <code>DOWN</code>).
*
* @return the alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getAlignment () {
checkWidget ();
if ((style & SWT.ARROW) != 0) {
if ((style & SWT.UP) != 0) return SWT.UP;
if ((style & SWT.DOWN) != 0) return SWT.DOWN;
if ((style & SWT.LEFT) != 0) return SWT.LEFT;
if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
return SWT.UP;
}
if ((style & SWT.LEFT) != 0) return SWT.LEFT;
if ((style & SWT.CENTER) != 0) return SWT.CENTER;
if ((style & SWT.RIGHT) != 0) return SWT.RIGHT;
return SWT.LEFT;
}
/**
* Returns <code>true</code> if the receiver is grayed,
* and false otherwise. When the widget does not have
* the <code>CHECK</code> style, return false.
*
* @return the grayed state of the checkbox
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.4
*/
public boolean getGrayed() {
checkWidget ();
if ((style & SWT.CHECK) == 0) return false;
return grayed;
}
/**
* Returns the receiver's image if it has one, or null
* if it does not.
*
* @return the receiver's image
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Image getImage () {
checkWidget();
return image;
}
String getNameText () {
return getText ();
}
/**
* Returns <code>true</code> if the receiver is selected,
* and false otherwise.
* <p>
* When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
* it is selected when it is checked. When it is of type <code>TOGGLE</code>,
* it is selected when it is pushed in. If the receiver is of any other type,
* this method returns false.
*
* @return the selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public boolean getSelection () {
checkWidget ();
if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return false;
if ((style & SWT.CHECK) != 0 && grayed) return ((NSButton)view).state() == OS.NSMixedState;
return ((NSButton)view).state() == OS.NSOnState;
}
/**
* Returns the receiver's text, which will be an empty
* string if it has never been set or if the receiver is
* an <code>ARROW</code> button.
*
* @return the receiver's text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getText () {
checkWidget ();
return text;
}
boolean isDescribedByLabel () {
return false;
}
/*
* Feature in Cocoa. If a checkbox is in multi-state mode, nextState cycles from off to mixed to on and back to off again.
* This will cause the on state to momentarily appear while clicking on the checkbox. To avoid this, we override [NSCell nextState]
* to go directly to the desired state if we have a grayed checkbox.
*/
int /*long*/ nextState(int /*long*/ id, int /*long*/ sel) {
if ((style & SWT.CHECK) != 0 && grayed) {
return ((NSButton)view).state() == OS.NSMixedState ? OS.NSOffState : OS.NSMixedState;
}
return super.nextState(id, sel);
}
void register() {
super.register();
display.addWidget(((NSControl)view).cell(), this);
}
void releaseWidget () {
super.releaseWidget ();
image = null;
text = null;
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is selected by the user.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook(SWT.Selection, listener);
eventTable.unhook(SWT.DefaultSelection,listener);
}
void selectRadio () {
/*
* This code is intentionally commented. When two groups
* of radio buttons with the same parent are separated by
* another control, the correct behavior should be that
* the two groups act independently. This is consistent
* with radio tool and menu items. The commented code
* implements this behavior.
*/
// int index = 0;
// Control [] children = parent._getChildren ();
// while (index < children.length && children [index] != this) index++;
// int i = index - 1;
// while (i >= 0 && children [i].setRadioSelection (false)) --i;
// int j = index + 1;
// while (j < children.length && children [j].setRadioSelection (false)) j++;
// setSelection (true);
Control [] children = parent._getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (this != child) child.setRadioSelection (false);
}
setSelection (true);
}
void sendSelection () {
if ((style & SWT.RADIO) != 0) {
if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) {
selectRadio ();
}
}
if ((style & SWT.CHECK) != 0) {
if (grayed && ((NSButton)view).state() == OS.NSOnState) {
((NSButton)view).setState(OS.NSOffState);
}
if (!grayed && ((NSButton)view).state() == OS.NSMixedState) {
((NSButton)view).setState(OS.NSOnState);
}
}
sendSelectionEvent (SWT.Selection);
}
/**
* Controls how text, images and arrows will be displayed
* in the receiver. The argument should be one of
* <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code>
* unless the receiver is an <code>ARROW</code> button, in
* which case, the argument indicates the direction of
* the arrow (one of <code>LEFT</code>, <code>RIGHT</code>,
* <code>UP</code> or <code>DOWN</code>).
*
* @param alignment the new alignment
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setAlignment (int alignment) {
checkWidget ();
_setAlignment (alignment);
redraw ();
}
void _setAlignment (int alignment) {
if ((style & SWT.ARROW) != 0) {
if ((style & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT)) == 0) return;
style &= ~(SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT);
style |= alignment & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT);
return;
}
if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
/* text is still null when this is called from createHandle() */
if (text != null) {
((NSButton)view).setAttributedTitle(createString());
}
}
void setBackgroundColor(NSColor nsColor) {
Control control = findBackgroundControl();
if (control == null || control.backgroundImage == null) {
NSButtonCell cell = new NSButtonCell(((NSButton)view).cell());
cell.setBackgroundColor(nsColor);
}
}
void setBackgroundImage(NSImage image) {
if (image != null) {
NSButtonCell cell = new NSButtonCell(((NSButton)view).cell());
cell.setBackgroundColor(null);
}
}
void setFont (NSFont font) {
if (text != null) {
((NSButton)view).setAttributedTitle(createString());
}
}
void setForeground (float /*double*/ [] color) {
((NSButton)view).setAttributedTitle(createString());
}
/**
* Sets the grayed state of the receiver. This state change
* only applies if the control was created with the SWT.CHECK
* style.
*
* @param grayed the new grayed state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.4
*/
public void setGrayed(boolean grayed) {
checkWidget ();
if ((style & SWT.CHECK) == 0) return;
boolean checked = getSelection ();
this.grayed = grayed;
((NSButton) view).setAllowsMixedState(grayed);
if (checked) {
if (grayed) {
((NSButton) view).setState (OS.NSMixedState);
} else {
((NSButton) view).setState (OS.NSOnState);
}
}
}
/**
* Sets the receiver's image to the argument, which may be
* <code>null</code> indicating that no image should be displayed.
* <p>
* Note that a Button can display an image and text simultaneously
* on Windows (starting with XP), GTK+ and OSX. On other platforms,
* a Button that has an image and text set into it will display the
* image or text that was set most recently.
* </p>
* @param image the image to display on the receiver (may be <code>null</code>)
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setImage (Image image) {
checkWidget();
if (image != null && image.isDisposed ()) {
error (SWT.ERROR_INVALID_ARGUMENT);
}
if ((style & SWT.ARROW) != 0) return;
this.image = image;
if ((style & (SWT.RADIO|SWT.CHECK)) == 0) {
/*
* Feature in Cocoa. If the NSImage object being set into the button is
* the same NSImage object that is already there then the button does not
* redraw itself. This results in the button's image not visually updating
* if the NSImage object's content has changed since it was last set
* into the button. The workaround is to explicitly redraw the button.
*/
((NSButton)view).setImage(image != null ? image.handle : null);
view.setNeedsDisplay(true);
} else {
((NSButton)view).setAttributedTitle(createString());
}
updateAlignment ();
}
boolean setRadioSelection (boolean value){
if ((style & SWT.RADIO) == 0) return false;
if (getSelection () != value) {
setSelection (value);
sendSelectionEvent (SWT.Selection);
}
return true;
}
/**
* Sets the selection state of the receiver, if it is of type <code>CHECK</code>,
* <code>RADIO</code>, or <code>TOGGLE</code>.
*
* <p>
* When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
* it is selected when it is checked. When it is of type <code>TOGGLE</code>,
* it is selected when it is pushed in.
*
* @param selected the new selection state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection (boolean selected) {
checkWidget();
if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return;
if (grayed) {
((NSButton)view).setState (selected ? OS.NSMixedState : OS.NSOffState);
} else {
((NSButton)view).setState (selected ? OS.NSOnState : OS.NSOffState);
}
}
/**
* Sets the receiver's text.
* <p>
* This method sets the button label. The label may include
* the mnemonic character but must not contain line delimiters.
* </p>
* <p>
* Mnemonics are indicated by an '&' that causes the next
* character to be the mnemonic. When the user presses a
* key sequence that matches the mnemonic, a selection
* event occurs. On most platforms, the mnemonic appears
* underlined but may be emphasized in a platform specific
* manner. The mnemonic indicator character '&' can be
* escaped by doubling it in the string, causing a single
* '&' to be displayed.
* </p><p>
* Note that a Button can display an image and text simultaneously
* on Windows (starting with XP), GTK+ and OSX. On other platforms,
* a Button that has an image and text set into it will display the
* image or text that was set most recently.
* </p>
* @param string the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setText (String string) {
checkWidget();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.ARROW) != 0) return;
text = string;
((NSButton)view).setAttributedTitle(createString());
updateAlignment ();
}
NSRect titleRectForBounds (int /*long*/ id, int /*long*/ sel, NSRect cellFrame) {
NSRect rect = super.titleRectForBounds(id, sel, cellFrame);
if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) {
NSSize imageSize = image.handle.size();
rect.x += imageSize.width + IMAGE_GAP;
rect.width -= (imageSize.width + IMAGE_GAP);
rect.width = Math.max(0f, rect.width);
}
return rect;
}
int traversalCode (int key, NSEvent theEvent) {
int code = super.traversalCode (key, theEvent);
if ((style & SWT.ARROW) != 0) code &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS);
if ((style & SWT.RADIO) != 0) code |= SWT.TRAVERSE_ARROW_NEXT | SWT.TRAVERSE_ARROW_PREVIOUS;
return code;
}
void updateAlignment () {
NSButton widget = (NSButton)view;
if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) {
if (text.length() != 0 && image != null) {
widget.setImagePosition(OS.NSImageLeft);
} else {
widget.setImagePosition(text.length() != 0 ? OS.NSNoImage : OS.NSImageOnly);
}
}
}
}
|