summaryrefslogtreecommitdiffstats
path: root/src/gui/kernel/qcocoaview_mac.mm
blob: 19367d1fc8e0f15fd0d4fbaca9653bd2eb3f5ccc (plain)
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
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#import <private/qcocoaview_mac_p.h>
#ifdef QT_MAC_USE_COCOA

#include <private/qwidget_p.h>
#include <private/qt_mac_p.h>
#include <private/qapplication_p.h>
#include <private/qabstractscrollarea_p.h>
#include <private/qt_cocoa_helpers_mac_p.h>
#include <private/qdnd_p.h>
#include <private/qmacinputcontext_p.h>

#include <qscrollarea.h>
#include <qhash.h>
#include <qtextformat.h>
#include <qpaintengine.h>
#include <QUrl>
#include <QAccessible>
#include <QFileInfo>
#include <QFile>

#include <qdebug.h>


QT_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(DnDParams, qMacDnDParams);

extern void qt_mac_update_cursor_at_global_pos(const QPoint &globalPos); // qcursor_mac.mm
extern bool qt_sendSpontaneousEvent(QObject *, QEvent *); // qapplication.cpp
extern OSViewRef qt_mac_nativeview_for(const QWidget *w); // qwidget_mac.mm
extern const QStringList& qEnabledDraggedTypes(); // qmime_mac.cpp
extern QPointer<QWidget> qt_mouseover; //qapplication_mac.mm

Qt::MouseButton cocoaButton2QtButton(NSInteger buttonNum)
{
    if (buttonNum == 0)
        return Qt::LeftButton;
    if (buttonNum == 1)
        return Qt::RightButton;
    if (buttonNum == 2)
        return Qt::MidButton;
    if (buttonNum == 3)
        return Qt::XButton1;
    if (buttonNum == 4)
        return Qt::XButton2;
    return Qt::NoButton;
}

struct dndenum_mapper
{
    NSDragOperation mac_code;
    Qt::DropAction qt_code;
    bool Qt2Mac;
};

static dndenum_mapper dnd_enums[] = {
    { NSDragOperationLink,  Qt::LinkAction, true },
    { NSDragOperationMove,  Qt::MoveAction, true },
    { NSDragOperationCopy,  Qt::CopyAction, true },
    { NSDragOperationGeneric,  Qt::CopyAction, false },
    { NSDragOperationEvery, Qt::ActionMask, false },
    { NSDragOperationNone, Qt::IgnoreAction, false } 
};

static NSDragOperation qt_mac_mapDropAction(Qt::DropAction action)
{
    for (int i=0; dnd_enums[i].qt_code; i++) {
        if (dnd_enums[i].Qt2Mac && (action & dnd_enums[i].qt_code)) {
            return dnd_enums[i].mac_code;
        }
    }
    return NSDragOperationNone;
}

static NSDragOperation qt_mac_mapDropActions(Qt::DropActions actions)
{
    NSDragOperation nsActions = NSDragOperationNone;
    for (int i=0; dnd_enums[i].qt_code; i++) {
        if (dnd_enums[i].Qt2Mac && (actions & dnd_enums[i].qt_code))
            nsActions |= dnd_enums[i].mac_code;
    }
    return nsActions;
}

static Qt::DropAction qt_mac_mapNSDragOperation(NSDragOperation nsActions)
{
    Qt::DropAction action = Qt::IgnoreAction;
    for (int i=0; dnd_enums[i].mac_code; i++) {
        if (nsActions & dnd_enums[i].mac_code)
            return dnd_enums[i].qt_code;
    }
    return action;
}

static Qt::DropActions qt_mac_mapNSDragOperations(NSDragOperation nsActions)
{
    Qt::DropActions actions = Qt::IgnoreAction;
    for (int i=0; dnd_enums[i].mac_code; i++) {
        if (nsActions & dnd_enums[i].mac_code)
            actions |= dnd_enums[i].qt_code;
    }
    return actions;
}

static QColor colorFrom(NSColor *color)
{
    QColor qtColor;
    NSString *colorSpace = [color colorSpaceName];
    if (colorSpace == NSDeviceCMYKColorSpace) {
        CGFloat cyan, magenta, yellow, black, alpha;
        [color getCyan:&cyan magenta:&magenta yellow:&yellow black:&black alpha:&alpha];
        qtColor.setCmykF(cyan, magenta, yellow, black, alpha);
    } else {
        NSColor *tmpColor;
        tmpColor = [color colorUsingColorSpaceName:NSDeviceRGBColorSpace];
        CGFloat red, green, blue, alpha;
        [tmpColor getRed:&red green:&green blue:&blue alpha:&alpha];
        qtColor.setRgbF(red, green, blue, alpha);
    }
    return qtColor;
}

QT_END_NAMESPACE

QT_FORWARD_DECLARE_CLASS(QMacCocoaAutoReleasePool)
QT_FORWARD_DECLARE_CLASS(QCFString)
QT_FORWARD_DECLARE_CLASS(QDragManager)
QT_FORWARD_DECLARE_CLASS(QMimeData)
QT_FORWARD_DECLARE_CLASS(QPoint)
QT_FORWARD_DECLARE_CLASS(QApplication)
QT_FORWARD_DECLARE_CLASS(QApplicationPrivate)
QT_FORWARD_DECLARE_CLASS(QDragEnterEvent)
QT_FORWARD_DECLARE_CLASS(QDragMoveEvent)
QT_FORWARD_DECLARE_CLASS(QStringList)
QT_FORWARD_DECLARE_CLASS(QString)
QT_FORWARD_DECLARE_CLASS(QRect)
QT_FORWARD_DECLARE_CLASS(QRegion)
QT_FORWARD_DECLARE_CLASS(QAbstractScrollArea)
QT_FORWARD_DECLARE_CLASS(QAbstractScrollAreaPrivate)
QT_FORWARD_DECLARE_CLASS(QPaintEvent)
QT_FORWARD_DECLARE_CLASS(QPainter)
QT_FORWARD_DECLARE_CLASS(QHoverEvent)
QT_USE_NAMESPACE
extern "C" {
    extern NSString *NSTextInputReplacementRangeAttributeName;
}


@implementation QT_MANGLE_NAMESPACE(QCocoaView)

- (id)initWithQWidget:(QWidget *)widget widgetPrivate:(QWidgetPrivate *)widgetprivate
{
    self = [super init];
    if (self) {
        [self finishInitWithQWidget:widget widgetPrivate:widgetprivate];
    }
    composing = false;
    sendKeyEvents = true;
    [self setHidden:YES];
    return self;
}

- (void) finishInitWithQWidget:(QWidget *)widget widgetPrivate:(QWidgetPrivate *)widgetprivate
{
    qwidget = widget;
    qwidgetprivate = widgetprivate;
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(frameDidChange:)
                                                 name:@"NSViewFrameDidChangeNotification"
                                               object:self];
}

-(void)registerDragTypes:(bool)accept
{
    QMacCocoaAutoReleasePool pool;
    if (accept) {
        const NSString* mimeTypeGeneric = @"com.trolltech.qt.MimeTypeName";
	NSMutableArray *supportedTypes = [NSMutableArray arrayWithObjects:NSColorPboardType, 
                                   NSFilenamesPboardType, NSStringPboardType, 
                                   NSFilenamesPboardType, NSPostScriptPboardType, NSTIFFPboardType, 
                                   NSRTFPboardType, NSTabularTextPboardType, NSFontPboardType, 
                                   NSRulerPboardType, NSFileContentsPboardType, NSColorPboardType, 
                                   NSRTFDPboardType, NSHTMLPboardType, NSPICTPboardType, 
                                   NSURLPboardType, NSPDFPboardType, NSVCardPboardType,
                                   NSFilesPromisePboardType, NSInkTextPboardType, 
                                   NSMultipleTextSelectionPboardType, mimeTypeGeneric, nil];
        // Add custom types supported by the application.
        const QStringList& customTypes = qEnabledDraggedTypes();
        for (int i = 0; i < customTypes.size(); i++) {
           [supportedTypes addObject:reinterpret_cast<const NSString *>(QCFString::toCFStringRef(customTypes[i]))];
        }
        [self registerForDraggedTypes:supportedTypes];
    } else {
        [self unregisterDraggedTypes];
    }
}

- (void)removeDropData
{
    if (dropData) {
        delete dropData;
        dropData = 0;
    }
}
 
- (void)addDropData:(id <NSDraggingInfo>)sender 
{
    [self removeDropData];
    CFStringRef dropPasteboard = (CFStringRef) [[sender draggingPasteboard] name]; 
    dropData = new QCocoaDropData(dropPasteboard);
} 

- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender 
{ 
    [self addDropData:sender];
    QMimeData *mimeData = dropData;
    if (QDragManager::self()->source())
        mimeData = QDragManager::self()->dragPrivate()->data;
    NSPoint windowPoint = [sender draggingLocation];
    NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
    NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
    QPoint posDrag(localPoint.x, localPoint.y);
    NSDragOperation nsActions = [sender draggingSourceOperationMask]; 
    Qt::DropActions qtAllowed = qt_mac_mapNSDragOperations(nsActions);
    // send the drag enter event to the widget.
    QDragEnterEvent qDEEvent(posDrag, qtAllowed, mimeData,
            QApplication::mouseButtons(), QApplication::keyboardModifiers());
    QApplication::sendEvent(qwidget, &qDEEvent);
    if (!qDEEvent.isAccepted()) {
        // widget is not interested in this drag, so ignore this drop data.
        [self removeDropData];
        return NSDragOperationNone;
    } else {
        // send a drag move event immediately after a drag enter event (as per documentation).
        QDragMoveEvent qDMEvent(posDrag, qtAllowed, mimeData,
                QApplication::mouseButtons(), QApplication::keyboardModifiers());
        qDMEvent.setDropAction(qDEEvent.dropAction());
        qDMEvent.accept(); // accept by default, since enter event was accepted.
        QApplication::sendEvent(qwidget, &qDMEvent);
        if (!qDMEvent.isAccepted() || qDMEvent.dropAction() == Qt::IgnoreAction) {
            // since we accepted the drag enter event, the widget expects 
            // future drage move events.  
	    // ### check if we need to treat this like the drag enter event.
            nsActions = QT_PREPEND_NAMESPACE(qt_mac_mapDropAction)(qDEEvent.dropAction());
        } else {
            nsActions = QT_PREPEND_NAMESPACE(qt_mac_mapDropAction)(qDMEvent.dropAction());
	}
        QT_PREPEND_NAMESPACE(qt_mac_copy_answer_rect)(qDMEvent);
	return nsActions;
    } 
 }
 
- (NSDragOperation)draggingUpdated:(id < NSDraggingInfo >)sender
{
    // drag enter event was rejected, so ignore the move event. 
    if (dropData == 0)
        return NSDragOperationNone;
    // return last value, if we are still in the answerRect.
    NSPoint windowPoint = [sender draggingLocation];
    NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
    NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
    QPoint posDrag(localPoint.x, localPoint.y);
    if (qt_mac_mouse_inside_answer_rect(posDrag))
        return QT_PREPEND_NAMESPACE(qt_mac_mapDropActions)(QT_PREPEND_NAMESPACE(qt_mac_dnd_answer_rec.lastAction));
    // send drag move event to the widget    
    NSDragOperation nsActions = [sender draggingSourceOperationMask]; 
    Qt::DropActions qtAllowed = QT_PREPEND_NAMESPACE(qt_mac_mapNSDragOperations)(nsActions);
    QMimeData *mimeData = dropData;
    if (QDragManager::self()->source())
        mimeData = QDragManager::self()->dragPrivate()->data;
    QDragMoveEvent qDMEvent(posDrag, qtAllowed, mimeData,
            QApplication::mouseButtons(), QApplication::keyboardModifiers());
    qDMEvent.setDropAction(QT_PREPEND_NAMESPACE(qt_mac_dnd_answer_rec).lastAction);
    qDMEvent.accept();
    QApplication::sendEvent(qwidget, &qDMEvent);
    qt_mac_copy_answer_rect(qDMEvent);

    NSDragOperation operation = qt_mac_mapDropAction(qDMEvent.dropAction());
    if (!qDMEvent.isAccepted() || qDMEvent.dropAction() == Qt::IgnoreAction) {
        // ignore this event (we will still receive further notifications)
        operation = NSDragOperationNone;
    }
    return operation;
}

- (void)draggingExited:(id < NSDraggingInfo >)sender
{
    Q_UNUSED(sender)
    // drag enter event was rejected, so ignore the move event. 
    if (dropData) {
        QDragLeaveEvent de;
        QApplication::sendEvent(qwidget, &de);
        [self removeDropData];
    }

}

- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{
    [self addDropData:sender];
    
    NSPoint windowPoint = [sender draggingLocation];
    NSPoint globalPoint = [[sender draggingDestinationWindow] convertBaseToScreen:windowPoint];
    NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
    QPoint posDrop(localPoint.x, localPoint.y);
    
    NSDragOperation nsActions = [sender draggingSourceOperationMask]; 
    Qt::DropActions qtAllowed = qt_mac_mapNSDragOperations(nsActions);
    QMimeData *mimeData = dropData;
    if (QDragManager::self()->source())
        mimeData = QDragManager::self()->dragPrivate()->data;
    // send the drop event to the widget.
    QDropEvent de(posDrop, qtAllowed, mimeData,
                  QApplication::mouseButtons(), QApplication::keyboardModifiers());
    if (QDragManager::self()->object)
        QDragManager::self()->dragPrivate()->target = qwidget;
    QApplication::sendEvent(qwidget, &de);
    if (!de.isAccepted())
        return NO;
    else
        return YES;
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [super dealloc];
}

- (BOOL)isOpaque;
{
    return qwidgetprivate->isOpaque;
}

- (BOOL)isFlipped;
{
    return YES;
}

- (BOOL) preservesContentDuringLiveResize;
{
    return qwidget->testAttribute(Qt::WA_StaticContents);
}

- (void) setFrameSize:(NSSize)newSize
{
    [super setFrameSize:newSize];
 
    // A change in size has required the view to be invalidated.
    if ([self inLiveResize])
    {
        NSRect rects[4];
        NSInteger count;
        [self getRectsExposedDuringLiveResize:rects count:&count];
        while (count-- > 0)
        {
            [self setNeedsDisplayInRect:rects[count]];
        }
    }
    else
    {
        [self setNeedsDisplay:YES];
    }
}

- (void)drawRect:(NSRect)aRect
{
    CGContextRef cg = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
    qwidgetprivate->hd = cg;
    CGContextSaveGState(cg);

    if (qwidget->isVisible() && qwidget->updatesEnabled()) { //process the actual paint event.
        if (qwidget->testAttribute(Qt::WA_WState_InPaintEvent))
            qWarning("QWidget::repaint: Recursive repaint detected");

        const QRect qrect = QRect(aRect.origin.x, aRect.origin.y, aRect.size.width, aRect.size.height);
        QRegion qrgn(qrect);

        if (!qwidget->isWindow() && !qobject_cast<QAbstractScrollArea *>(qwidget->parent())) {
            const QRegion &parentMask = qwidget->window()->mask();
            if (!parentMask.isEmpty()) {
                const QPoint mappedPoint = qwidget->mapTo(qwidget->window(), qrect.topLeft());
                qrgn.translate(mappedPoint);
                qrgn &= parentMask;
                qrgn.translate(-mappedPoint.x(), -mappedPoint.y());
            }
        }

        QPoint redirectionOffset(0, 0);
        //setup the context
        qwidget->setAttribute(Qt::WA_WState_InPaintEvent);
        QPaintEngine *engine = qwidget->paintEngine();
        if (engine)
            engine->setSystemClip(qrgn);
        if (qwidgetprivate->extra && qwidgetprivate->extra->hasMask) {
            CGRect widgetRect = CGRectMake(0, 0, qwidget->width(), qwidget->height());
            CGContextTranslateCTM (cg, 0, widgetRect.size.height);
            CGContextScaleCTM(cg, 1, -1);
            if (qwidget->isWindow())
                CGContextClearRect(cg, widgetRect);
            CGContextClipToMask(cg, widgetRect, qwidgetprivate->extra->imageMask);
            CGContextScaleCTM(cg, 1, -1);
            CGContextTranslateCTM (cg, 0, -widgetRect.size.height);
        }

        if (qwidget->isWindow() && !qwidgetprivate->isOpaque
                && !qwidget->testAttribute(Qt::WA_MacBrushedMetal)) {
            CGContextClearRect(cg, NSRectToCGRect(aRect));
        }

        if (engine && !qwidget->testAttribute(Qt::WA_NoSystemBackground)
            && (qwidget->isWindow() || qwidget->autoFillBackground())
                || qwidget->testAttribute(Qt::WA_TintedBackground)
                || qwidget->testAttribute(Qt::WA_StyledBackground)) {
#ifdef DEBUG_WIDGET_PAINT
            if(doDebug)
                qDebug(" Handling erase for [%s::%s]", qwidget->metaObject()->className(),
                       qwidget->objectName().local8Bit().data());
#endif
            QPainter p(qwidget);
            QAbstractScrollArea *scrollArea = qobject_cast<QAbstractScrollArea *>(qwidget->parent());
            QPoint scrollAreaOffset;
            if (scrollArea && scrollArea->viewport() == qwidget) {
                QAbstractScrollAreaPrivate *priv
                        = static_cast<QAbstractScrollAreaPrivate *>(qt_widget_private(scrollArea));
                scrollAreaOffset = priv->contentsOffset();
                p.translate(-scrollAreaOffset);
            }
            qwidgetprivate->paintBackground(&p, qrgn, scrollAreaOffset,
                                            qwidget->isWindow() ? QWidgetPrivate::DrawAsRoot : 0);
            p.end();
        }
        QPaintEvent e(qrgn);
#ifdef QT3_SUPPORT
        e.setErased(true);
#endif
        qt_sendSpontaneousEvent(qwidget, &e);
        if (!redirectionOffset.isNull())
            QPainter::restoreRedirected(qwidget);
#ifdef QT_RASTER_PAINTENGINE
        if(engine && engine->type() == QPaintEngine::Raster)
            static_cast<QRasterPaintEngine*>(engine)->flush(qwidget,
                                                            qrgn.boundingRect().topLeft());
#endif
        if (engine)
            engine->setSystemClip(QRegion());
        qwidget->setAttribute(Qt::WA_WState_InPaintEvent, false);
        if(!qwidget->testAttribute(Qt::WA_PaintOutsidePaintEvent) && qwidget->paintingActive())
            qWarning("QWidget: It is dangerous to leave painters active on a"
                     " widget outside of the PaintEvent");
    }
    qwidgetprivate->hd = 0;
    CGContextRestoreGState(cg);
}

- (BOOL)acceptsFirstMouse:(NSEvent *)theEvent
{
    Q_UNUSED(theEvent);
    return !qwidget->testAttribute(Qt::WA_MacNoClickThrough);
}

- (void)updateTrackingAreas
{
    QMacCocoaAutoReleasePool pool;
    if (NSArray *trackingArray = [self trackingAreas]) {
        NSUInteger size = [trackingArray count];
        for (NSUInteger i = 0; i < size; ++i) {
            NSTrackingArea *t = [trackingArray objectAtIndex:i];
            [self removeTrackingArea:t];
        }
    }
    NSUInteger trackingOptions = NSTrackingMouseEnteredAndExited | NSTrackingActiveInActiveApp
                                 | NSTrackingInVisibleRect;
    if (qwidget->hasMouseTracking() || !qwidgetprivate->toolTip.isEmpty()
        || qwidget->testAttribute(Qt::WA_Hover))
        trackingOptions |= NSTrackingMouseMoved;
    NSTrackingArea *ta = [[NSTrackingArea alloc] initWithRect:NSMakeRect(0, 0,
                                                                         qwidget->width(),
                                                                         qwidget->height())
                                                      options:trackingOptions
                                                        owner:self
                                                     userInfo:nil];
    [self addTrackingArea:ta];
    [ta release];
}

- (void)mouseEntered:(NSEvent *)event
{
    QEvent enterEvent(QEvent::Enter);
    NSPoint windowPoint = [event locationInWindow];
    NSPoint globalPoint = [[event window] convertBaseToScreen:windowPoint];
    NSPoint viewPoint = [self convertPoint:windowPoint fromView:nil];
    if (!qAppInstance()->activeModalWidget() || QApplicationPrivate::tryModalHelper(qwidget, 0)) {
        QApplication::sendEvent(qwidget, &enterEvent);
        qt_mouseover = qwidget;
        
        // Update cursor and dispatch hover events.
        qt_mac_update_cursor_at_global_pos(flipPoint(globalPoint).toPoint());
        if (qwidget->testAttribute(Qt::WA_Hover) &&
            (!qAppInstance()->activePopupWidget() || qAppInstance()->activePopupWidget() == qwidget->window())) {
            QHoverEvent he(QEvent::HoverEnter, QPoint(viewPoint.x, viewPoint.y), QPoint(-1, -1));
            QApplicationPrivate::instance()->notify_helper(qwidget, &he);
        }
    }    
}

- (void)mouseExited:(NSEvent *)event
{
    QEvent leaveEvent(QEvent::Leave);
    NSPoint globalPoint = [[event window] convertBaseToScreen:[event locationInWindow]];
    if (!qAppInstance()->activeModalWidget() || QApplicationPrivate::tryModalHelper(qwidget, 0)) {
        QApplication::sendEvent(qwidget, &leaveEvent);
        
        // ### Think about if it is necessary to update the cursor, should only be for a few cases.
        qt_mac_update_cursor_at_global_pos(flipPoint(globalPoint).toPoint());
        if (qwidget->testAttribute(Qt::WA_Hover)
            && (!qAppInstance()->activePopupWidget() || qAppInstance()->activePopupWidget() == qwidget->window())) {
            QHoverEvent he(QEvent::HoverLeave, QPoint(-1, -1),
                           qwidget->mapFromGlobal(QApplicationPrivate::instance()->hoverGlobalPos));
            QApplicationPrivate::instance()->notify_helper(qwidget, &he);
        }
    }
}

- (void)flagsChanged:(NSEvent *)theEvent
{
    QWidget *widgetToGetKey = qwidget;

    QWidget *popup = qAppInstance()->activePopupWidget();
    if (popup && popup != qwidget->window())
        widgetToGetKey = popup->focusWidget() ? popup->focusWidget() : popup;
    qt_dispatchModifiersChanged(theEvent, widgetToGetKey);
    [super flagsChanged:theEvent];
}

- (void)mouseMoved:(NSEvent *)theEvent
{
    qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseMove, Qt::NoButton);
}

- (NSView *)viewUnderTransparentForMouseView:(NSView *)mouseView widget:(QWidget *)widgetToGetMouse
                             withWindowPoint:(NSPoint)windowPoint
{
    NSMutableArray *viewsToLookAt = [NSMutableArray arrayWithCapacity:5];
    [viewsToLookAt addObject:mouseView];
    QWidget *parentWidget = widgetToGetMouse->parentWidget();
    while (parentWidget) {
        [viewsToLookAt addObject:qt_mac_nativeview_for(parentWidget)];
        parentWidget = parentWidget->parentWidget();
    }
    
    // Now walk through the subviews of each view and determine which subview should
    // get the event. We look through all the subviews at a given level with
    // the assumption that the last item to be found the candidate has a higher z-order.
    // Unfortunately, fast enumeration doesn't go backwards in 10.5, so assume go fast
    // forward is quicker than the slow normal way backwards.
    NSView *candidateView = nil;
    for (NSView *lookView in viewsToLookAt) {
        NSPoint tmpPoint = [lookView convertPoint:windowPoint fromView:nil];
        for (NSView *view in [lookView subviews]) {
            if (view == mouseView)
                continue;
            NSRect frameRect = [view frame];
            if (NSMouseInRect(tmpPoint, [view frame], [view isFlipped]))
                candidateView = view;
        }
        if (candidateView)
            break;
    }
    
    
    if (candidateView != nil) {
        // Now that we've got a candidate, we have to dig into it's tree and see where it is.
        NSView *lowerView = nil;
        NSView *viewForDescent = candidateView;
        while (viewForDescent) {
            NSPoint tmpPoint = [viewForDescent convertPoint:windowPoint fromView:nil];                
            // Apply same rule as above wrt z-order.
            for (NSView *view in [viewForDescent subviews]) {
                if (NSMouseInRect(tmpPoint, [view frame], [view isFlipped]))
                    lowerView = view;
            }
            if (!lowerView) // Low as we can be at this point.
                candidateView = viewForDescent;

            // Try to go deeper, will also exit out of the loop, if we found the point.
            viewForDescent = lowerView;
            lowerView = nil;
        }
    }
    // I am transparent, so I can't be a candidate.
    if (candidateView == mouseView)
        candidateView = nil;
    return candidateView;
}

- (void)mouseDown:(NSEvent *)theEvent
{
    qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonPress, Qt::LeftButton);
    // Don't call super here. This prevents us from getting the mouseUp event,
    // which we need to send even if the mouseDown event was not accepted. 
    // (this is standard Qt behavior.)
}


- (void)mouseUp:(NSEvent *)theEvent
{
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonRelease, Qt::LeftButton);

    if (!mouseOK)
        [super mouseUp:theEvent];
}

- (void)rightMouseDown:(NSEvent *)theEvent
{        
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonPress, Qt::RightButton);

    if (!mouseOK)
        [super rightMouseDown:theEvent];
}

- (void)rightMouseUp:(NSEvent *)theEvent
{
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonRelease, Qt::RightButton);

    if (!mouseOK)
        [super rightMouseUp:theEvent];
}

- (void)otherMouseDown:(NSEvent *)theEvent
{
    Qt::MouseButton mouseButton = cocoaButton2QtButton([theEvent buttonNumber]);
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseButtonPress, mouseButton);

    if (!mouseOK)
        [super otherMouseDown:theEvent];
}

- (void)otherMouseUp:(NSEvent *)theEvent
{
    Qt::MouseButton mouseButton = cocoaButton2QtButton([theEvent buttonNumber]);
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent,  QEvent::MouseButtonRelease, mouseButton);

    if (!mouseOK)
        [super otherMouseUp:theEvent];

}

- (void)mouseDragged:(NSEvent *)theEvent
{
    qMacDnDParams()->view = self;
    qMacDnDParams()->theEvent = theEvent;
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseMove, Qt::LeftButton);

    if (!mouseOK)
        [super mouseDragged:theEvent];
}

- (void)rightMouseDragged:(NSEvent *)theEvent
{
    qMacDnDParams()->view = self;
    qMacDnDParams()->theEvent = theEvent;
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseMove, Qt::RightButton);

    if (!mouseOK)
        [super rightMouseDragged:theEvent];
}

- (void)otherMouseDragged:(NSEvent *)theEvent
{
    qMacDnDParams()->view = self;
    qMacDnDParams()->theEvent = theEvent;
    Qt::MouseButton mouseButton = cocoaButton2QtButton([theEvent buttonNumber]);
    bool mouseOK = qt_mac_handleMouseEvent(self, theEvent, QEvent::MouseMove, mouseButton);

    if (!mouseOK)
        [super otherMouseDragged:theEvent];
}

- (void)scrollWheel:(NSEvent *)theEvent
{
    // Give the Input Manager a chance to process the wheel event.
    NSInputManager *currentIManager = [NSInputManager currentInputManager];
    if (currentIManager && [currentIManager wantsToHandleMouseEvents]) {
        [currentIManager handleMouseEvent:theEvent];
    }
    
    NSPoint windowPoint = [theEvent locationInWindow];
    NSPoint globalPoint = [[theEvent window] convertBaseToScreen:windowPoint];
    NSPoint localPoint = [self convertPoint:windowPoint fromView:nil];
    QPoint qlocal = QPoint(localPoint.x, localPoint.y);
    QPoint qglobal = QPoint(globalPoint.x, globalPoint.y);
    Qt::MouseButton buttons = cocoaButton2QtButton([theEvent buttonNumber]);
    bool wheelOK = false;
    Qt::KeyboardModifiers keyMods = qt_cocoaModifiers2QtModifiers([theEvent modifierFlags]);
    
    // Mouse wheel deltas seem to tick in at increments of 0.1. Qt widgets
    // expect the delta to be a multiple of 120. 
    const int ScrollFactor = 10 * 120;
    //                                              The qMax(...) factor reduces the 
    //                                              acceleration for large wheel deltas.
    int deltaX = [theEvent deltaX] * ScrollFactor * qMax(0.6, 1.1 - qAbs([theEvent deltaX]));
    int deltaY = [theEvent deltaY] * ScrollFactor * qMax(0.6, 1.1 - qAbs([theEvent deltaY]));
    int deltaZ = [theEvent deltaZ] * ScrollFactor * qMax(0.6, 1.1 - qAbs([theEvent deltaZ]));

    if (deltaX != 0) {
        QWheelEvent qwe(qlocal, qglobal, deltaX, buttons, keyMods, Qt::Horizontal);
        qt_sendSpontaneousEvent(qwidget, &qwe);
        wheelOK = qwe.isAccepted();
        if (!wheelOK && QApplicationPrivate::focus_widget
            && QApplicationPrivate::focus_widget != qwidget) {
            QWheelEvent qwe2(QApplicationPrivate::focus_widget->mapFromGlobal(qglobal), qglobal,
                             deltaX, buttons, keyMods, Qt::Horizontal);
            qt_sendSpontaneousEvent(QApplicationPrivate::focus_widget, &qwe2);
            wheelOK = qwe2.isAccepted();
        }
    }
    
    if (deltaY) {
        QWheelEvent qwe(qlocal, qglobal, deltaY, buttons, keyMods, Qt::Vertical);
        qt_sendSpontaneousEvent(qwidget, &qwe);
        wheelOK = qwe.isAccepted();
        if (wheelOK && QApplicationPrivate::focus_widget
            && QApplicationPrivate::focus_widget != qwidget) {
            QWheelEvent qwe2(QApplicationPrivate::focus_widget->mapFromGlobal(qglobal), qglobal,
                             deltaZ, buttons, keyMods, Qt::Vertical);
            qt_sendSpontaneousEvent(QApplicationPrivate::focus_widget, &qwe2);
            wheelOK = qwe2.isAccepted();
        }
    }
    
    if (deltaZ) {
        // Qt doesn't explicitly support wheels with a Z component. In a misguided attempt to
        // try to be ahead of the pack, I'm adding this extra value.
        QWheelEvent qwe(qlocal, qglobal, deltaZ, buttons, keyMods, (Qt::Orientation)3);
        qt_sendSpontaneousEvent(qwidget, &qwe);
        wheelOK = qwe.isAccepted();
        if (!wheelOK && QApplicationPrivate::focus_widget
            && QApplicationPrivate::focus_widget != qwidget) {
            QWheelEvent qwe2(QApplicationPrivate::focus_widget->mapFromGlobal(qglobal), qglobal,
                             deltaZ, buttons, keyMods, (Qt::Orientation)3);
            qt_sendSpontaneousEvent(QApplicationPrivate::focus_widget, &qwe2);
            wheelOK = qwe2.isAccepted();
        }
    }
    if (!wheelOK) {
        return [super scrollWheel:theEvent];
    }
}

- (void)tabletProximity:(NSEvent *)tabletEvent
{
    qt_dispatchTabletProximityEvent(tabletEvent);
}

- (void)tabletPoint:(NSEvent *)tabletEvent
{
    if (!qt_mac_handleTabletEvent(self, tabletEvent))
        [super tabletPoint:tabletEvent];
}

- (void)frameDidChange:(NSNotification *)note
{
    Q_UNUSED(note);
    if (qwidget->isWindow())
        return;
    NSRect newFrame = [self frame];
    QRect newGeo(newFrame.origin.x, newFrame.origin.y, newFrame.size.width, newFrame.size.height);
    bool moved = qwidget->testAttribute(Qt::WA_Moved);
    bool resized = qwidget->testAttribute(Qt::WA_Resized);
    qwidget->setGeometry(newGeo);
    qwidget->setAttribute(Qt::WA_Moved, moved);
    qwidget->setAttribute(Qt::WA_Resized, resized);
    qwidgetprivate->syncCocoaMask();
}

- (BOOL)isEnabled
{
    if (!qwidget)
        return [super isEnabled];
    return [super isEnabled] && qwidget->isEnabled();
}

- (void)setEnabled:(BOOL)flag
{
    QMacCocoaAutoReleasePool pool;
    [super setEnabled:flag];
    if (qwidget->isEnabled() != flag)
        qwidget->setEnabled(flag);
}

+ (Class)cellClass
{
    return [NSActionCell class];
}

- (BOOL)acceptsFirstResponder
{
    if (qwidget->isWindow())
        return YES;  // Always do it, so that windows can accept key press events.
    return qwidget->focusPolicy() != Qt::NoFocus;
}

- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
{
    Q_UNUSED(isLocal);
    return supportedActions;
}

- (void)setSupportedActions:(NSDragOperation)actions
{
    supportedActions = actions;
}

- (void)draggedImage:(NSImage *)anImage endedAt:(NSPoint)aPoint operation:(NSDragOperation)operation
{
    Q_UNUSED(anImage);
    Q_UNUSED(aPoint);
    qMacDnDParams()->performedAction = operation;
}

- (QWidget *)qt_qwidget
{
    return qwidget;
}

- (BOOL)qt_leftButtonIsRightButton
{
    return leftButtonIsRightButton;
}

- (void)qt_setLeftButtonIsRightButton:(BOOL)isSwapped
{
    leftButtonIsRightButton = isSwapped;
}

+ (DnDParams*)currentMouseEvent
{
    return qMacDnDParams();
}

- (void)keyDown:(NSEvent *)theEvent
{
    sendKeyEvents = true;

    QWidget *widgetToGetKey = qwidget;

    QWidget *popup = qAppInstance()->activePopupWidget();
    bool sendToPopup = false;
    if (popup && popup != qwidget->window()) {
        widgetToGetKey = popup->focusWidget() ? popup->focusWidget() : popup;
        sendToPopup = true;
    }

    if (widgetToGetKey->testAttribute(Qt::WA_InputMethodEnabled)) {
        [qt_mac_nativeview_for(widgetToGetKey) interpretKeyEvents:[NSArray arrayWithObject: theEvent]];
    }
    if (sendKeyEvents && !composing) {
        bool keyOK = qt_dispatchKeyEvent(theEvent, widgetToGetKey);
        if (!keyOK && !sendToPopup)
            [super keyDown:theEvent];
    }
}


- (void)keyUp:(NSEvent *)theEvent
{
    if (sendKeyEvents) {
        bool keyOK = qt_dispatchKeyEvent(theEvent, qwidget);
        if (!keyOK)
            [super keyUp:theEvent];
    }
}

// NSTextInput Protocol implementation

- (void) insertText:(id)aString
{
    if (composing) {
        // Send the commit string to the widget.
        QString commitText;
        if ([aString isKindOfClass:[NSAttributedString class]]) {
           commitText = QCFString::toQString(reinterpret_cast<CFStringRef>([aString string]));
        } else {
            commitText = QCFString::toQString(reinterpret_cast<CFStringRef>(aString));
        };
        composing = false;
        sendKeyEvents = false;
        QInputMethodEvent e;
        e.setCommitString(commitText);
        qt_sendSpontaneousEvent(qwidget, &e);
    }
}

- (void) setMarkedText:(id)aString selectedRange:(NSRange)selRange
{
    // Generate the QInputMethodEvent with preedit string and the attributes
    // for rendering it. The attributes handled here are 'underline',
    // 'underline color' and 'cursor position'.
    sendKeyEvents = false;
    composing = true;
    QString qtText;
    // Cursor position is retrived from the range.
    QList<QInputMethodEvent::Attribute> attrs;
    attrs<<QInputMethodEvent::Attribute(QInputMethodEvent::Cursor, selRange.location, 1, QVariant());
    if ([aString isKindOfClass:[NSAttributedString class]]) {
        qtText = QCFString::toQString(reinterpret_cast<CFStringRef>([aString string]));
        composingLength = qtText.length();
        int index = 0;
        // Create attributes for individual sections of preedit text
        while (index < composingLength) {
            NSRange effectiveRange;
            NSRange range = NSMakeRange(index, composingLength-index);
            NSDictionary *attributes = [aString attributesAtIndex:index 
                                            longestEffectiveRange:&effectiveRange
                                                          inRange:range];
            NSNumber *underlineStyle = [attributes objectForKey:NSUnderlineStyleAttributeName];
            if (underlineStyle) {
                QColor clr (Qt::black);
                NSColor *color = [attributes objectForKey:NSUnderlineColorAttributeName];
                if (color) {
                    clr = colorFrom(color);
                } 
                QTextCharFormat format;
                format.setFontUnderline(true);
                format.setUnderlineColor(clr);
                attrs<<QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,
                                                    effectiveRange.location,
                                                    effectiveRange.length,
                                                    format);
            }
            index = effectiveRange.location + effectiveRange.length;
        }
    } else {
        // No attributes specified, take only the preedit text.
        qtText = QCFString::toQString(reinterpret_cast<CFStringRef>(aString));
        composingLength = qtText.length();
    }
    // Make sure that we have at least one text format.
    if (attrs.size() <= 1) {
        QTextCharFormat format;
        format.setFontUnderline(true);
        attrs<<QInputMethodEvent::Attribute(QInputMethodEvent::TextFormat,
                                            0, composingLength, format);
    }
    QInputMethodEvent e(qtText, attrs);
    qt_sendSpontaneousEvent(qwidget, &e);
}

- (void) unmarkText
{
    composing = false;
}

- (BOOL) hasMarkedText
{
    return (composing ? YES: NO);
}

- (void) doCommandBySelector:(SEL)aSelector
{
    Q_UNUSED(aSelector);
}

- (BOOL)isComposing
{
    return composing;
}

- (NSInteger) conversationIdentifier
{
    // Return a unique identifier fot this ime conversation
    return (NSInteger)self;
}

- (NSAttributedString *) attributedSubstringFromRange:(NSRange)theRange
{
    QString selectedText(qwidget->inputMethodQuery(Qt::ImCurrentSelection).toString());
    if (!selectedText.isEmpty()) {
        QCFString string(selectedText.mid(theRange.location, theRange.length));
        const NSString *tmpString = reinterpret_cast<const NSString *>((CFStringRef)string);
        return [[[NSAttributedString alloc]  initWithString:tmpString] autorelease];
    } else {
        return nil;
    }
}

- (NSRange) markedRange
{
    NSRange range; 
    if (composing) {
        range.location = 0;
        range.length = composingLength;
    } else {
        range.location = NSNotFound;
        range.length = 0;
    }
    return range;
}

- (NSRange) selectedRange
{
    NSRange selRange;
    QString selectedText(qwidget->inputMethodQuery(Qt::ImCurrentSelection).toString());
    if (!selectedText.isEmpty()) {
        // Consider only the selected text.
        selRange.location = 0;
        selRange.length = selectedText.length();
    } else {
        // No selected text.
        selRange.location = NSNotFound;
        selRange.length = 0;
    }
    return selRange;
    
}

- (NSRect) firstRectForCharacterRange:(NSRange)theRange
{
    Q_UNUSED(theRange);
    // The returned rect is always based on the internal cursor. 
    QRect mr(qwidget->inputMethodQuery(Qt::ImMicroFocus).toRect());
    QPoint mp(qwidget->mapToGlobal(QPoint(mr.bottomLeft())));
    NSRect rect ;
    rect.origin.x = mp.x();
    rect.origin.y = flipYCoordinate(mp.y());
    rect.size.width = mr.width();
    rect.size.height = mr.height();
    return rect;
}

- (NSUInteger)characterIndexForPoint:(NSPoint)thePoint
{
    // We dont support cursor movements using mouse while composing.
    Q_UNUSED(thePoint);
    return NSNotFound;
}

- (NSArray*) validAttributesForMarkedText
{
    if (!qwidget->testAttribute(Qt::WA_InputMethodEnabled))
        return nil;  // Not sure if that's correct, but it's saves a malloc.

    // Support only underline color/style.
    return [NSArray arrayWithObjects:NSUnderlineColorAttributeName,
                                     NSUnderlineStyleAttributeName, nil];
}
@end

QT_BEGIN_NAMESPACE
void QMacInputContext::reset()
{
    QWidget *w = QInputContext::focusWidget();
    if (w) {
        NSView *view = qt_mac_nativeview_for(w);
        if ([view isKindOfClass:[QT_MANGLE_NAMESPACE(QCocoaView) class]]) {
            QMacCocoaAutoReleasePool pool;
            QT_MANGLE_NAMESPACE(QCocoaView) *qc = static_cast<QT_MANGLE_NAMESPACE(QCocoaView) *>(view);
            NSInputManager *currentIManager = [NSInputManager currentInputManager];
            if (currentIManager) {
                [currentIManager markedTextAbandoned:view];
                [qc unmarkText];
            }
        }
    }
}

bool QMacInputContext::isComposing() const
{
    QWidget *w = QInputContext::focusWidget();
    if (w) {
        NSView *view = qt_mac_nativeview_for(w);
        if ([view isKindOfClass:[QT_MANGLE_NAMESPACE(QCocoaView) class]]) {
            return [static_cast<QT_MANGLE_NAMESPACE(QCocoaView) *>(view) isComposing];
        }
    }
    return false;
}

extern bool qt_mac_in_drag;
void * /*NSImage */qt_mac_create_nsimage(const QPixmap &pm);
static const int default_pm_hotx = -2;
static const int default_pm_hoty = -16;
static const char* default_pm[] = {
    "13 9 3 1",
    ".      c None",
    "       c #000000",
    "X      c #FFFFFF",
    "X X X X X X X",
    " X X X X X X ",
    "X ......... X",
    " X.........X ",
    "X ......... X",
    " X.........X ",
    "X ......... X",
    " X X X X X X ",
    "X X X X X X X",
};

Qt::DropAction QDragManager::drag(QDrag *o)
{
    if(qt_mac_in_drag) {     //just make sure..
        qWarning("Qt: Internal error: WH0A, unexpected condition reached");
        return Qt::IgnoreAction;
    }
    if(object == o)
        return Qt::IgnoreAction;
    /* At the moment it seems clear that Mac OS X does not want to drag with a non-left button
     so we just bail early to prevent it */
    if(!(GetCurrentEventButtonState() & kEventMouseButtonPrimary))
        return Qt::IgnoreAction;
    
    if(object) {
        dragPrivate()->source->removeEventFilter(this);
        cancel();
        beingCancelled = false;
    }
    
    object = o;
    dragPrivate()->target = 0;

#ifndef QT_NO_ACCESSIBILITY
    QAccessible::updateAccessibility(this, 0, QAccessible::DragDropStart);
#endif

    // setup the data
    QMacPasteboard dragBoard((CFStringRef) NSDragPboard, QMacPasteboardMime::MIME_DND);
    dragPrivate()->data->setData(QLatin1String("application/x-qt-mime-type-name"), QByteArray());
    dragBoard.setMimeData(dragPrivate()->data);
    
    // create the image
    QPoint hotspot;
    QPixmap pix = dragPrivate()->pixmap;
    if(pix.isNull()) {
        if(dragPrivate()->data->hasText() || dragPrivate()->data->hasUrls()) {
            // get the string
            QString s = dragPrivate()->data->hasText() ? dragPrivate()->data->text()
            : dragPrivate()->data->urls().first().toString();
            if(s.length() > 26)
                s = s.left(23) + QChar(0x2026);
            if(!s.isEmpty()) {
                // draw it
                QFont f(qApp->font());
                f.setPointSize(12);
                QFontMetrics fm(f);
                QPixmap tmp(fm.width(s), fm.height());
                if(!tmp.isNull()) {
                    QPainter p(&tmp);
                    p.fillRect(0, 0, tmp.width(), tmp.height(), Qt::color0);
                    p.setPen(Qt::color1);
                    p.setFont(f);
                    p.drawText(0, fm.ascent(), s);
                    // save it
                    pix = tmp;
                    hotspot = QPoint(tmp.width() / 2, tmp.height() / 2);
                }
            }
        } else {
            pix = QPixmap(default_pm);
            hotspot = QPoint(default_pm_hotx, default_pm_hoty);
        }
    } else {
        hotspot = dragPrivate()->hotspot;
    }
    // convert the image to NSImage.
    NSImage *image = (NSImage *)qt_mac_create_nsimage(pix);
    [image retain];
    DnDParams *dndParams = [QT_MANGLE_NAMESPACE(QCocoaView) currentMouseEvent];
    // save supported actions 
    [dndParams->view setSupportedActions: qt_mac_mapDropActions(dragPrivate()->possible_actions)];
    NSPoint imageLoc = {dndParams->localPoint.x - hotspot.x(),
                        dndParams->localPoint.y + pix.height() - hotspot.y()};
    NSSize mouseOffset = {0.0, 0.0};
    NSPasteboard *pboard = [NSPasteboard pasteboardWithName:NSDragPboard];
    NSPoint windowPoint = [dndParams->theEvent locationInWindow];
    // do the drag
    [dndParams->view retain];
    [dndParams->view dragImage:image
                            at:imageLoc
                        offset:mouseOffset
                         event:dndParams->theEvent
                    pasteboard:pboard
                        source:dndParams->view
                     slideBack:YES];
    [dndParams->view release];
    [image release];
    object = 0;
    Qt::DropAction performedAction(qt_mac_mapNSDragOperation(dndParams->performedAction));
    // do post drag processing, if required.
    if(performedAction != Qt::IgnoreAction) {
        // check if the receiver points us to a file location. 
        // if so, we need to do the file copy/move ourselves.
        QCFType<CFURLRef> pasteLocation = 0;
        PasteboardCopyPasteLocation(dragBoard.pasteBoard(), &pasteLocation);
        if (pasteLocation) {
            QList<QUrl> urls = o->mimeData()->urls();
            for (int i = 0; i < urls.size(); ++i) {
                QUrl fromUrl = urls.at(i);
                QString filename = QFileInfo(fromUrl.path()).fileName();
                QUrl toUrl(QCFString::toQString(CFURLGetString(pasteLocation)) + filename);
                if (performedAction == Qt::MoveAction)
                    QFile::rename(fromUrl.path(), toUrl.path());
                else if (performedAction == Qt::CopyAction)
                    QFile::copy(fromUrl.path(), toUrl.path());
            }
        }
    }
    return performedAction;
}

QT_END_NAMESPACE

#endif // QT_MAC_USE_COCOA