summaryrefslogtreecommitdiff
path: root/gdk/gdkevents.h
blob: 458e550bc635e09950e2ea95c88d73e1d4376d91 (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
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
/* GDK - The GIMP Drawing Kit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
 */

#ifndef __GDK_EVENTS_H__
#define __GDK_EVENTS_H__

#if !defined (__GDK_H_INSIDE__) && !defined (GDK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif

#include <gdk/gdkversionmacros.h>
#include <gdk/gdkcolor.h>
#include <gdk/gdktypes.h>
#include <gdk/gdkdnd.h>
#include <gdk/gdkdevice.h>

G_BEGIN_DECLS


/**
 * SECTION:event_structs
 * @Short_description: Data structures specific to each type of event
 * @Title: Event Structures
 *
 * The event structures contain data specific to each type of event in GDK.
 *
 * > A common mistake is to forget to set the event mask of a widget so that
 * > the required events are received. See gtk_widget_set_events().
 */


#define GDK_TYPE_EVENT          (gdk_event_get_type ())

/**
 * GDK_PRIORITY_EVENTS:
 *
 * This is the priority that events from the X server are given in the
 * <link linkend="glib-The-Main-Event-Loop">GLib Main Loop</link>.
 */
#define GDK_PRIORITY_EVENTS	(G_PRIORITY_DEFAULT)

/**
 * GDK_PRIORITY_REDRAW:
 *
 * This is the priority that the idle handler processing window updates
 * is given in the
 * <link linkend="glib-The-Main-Event-Loop">GLib Main Loop</link>.
 */
#define GDK_PRIORITY_REDRAW     (G_PRIORITY_HIGH_IDLE + 20)

/**
 * GDK_EVENT_PROPAGATE:
 *
 * Use this macro as the return value for continuing the propagation of
 * an event handler.
 *
 * Since: 3.4
 */
#define GDK_EVENT_PROPAGATE     (FALSE)

/**
 * GDK_EVENT_STOP:
 *
 * Use this macro as the return value for stopping the propagation of
 * an event handler.
 *
 * Since: 3.4
 */
#define GDK_EVENT_STOP          (TRUE)

/**
 * GDK_BUTTON_PRIMARY:
 *
 * The primary button. This is typically the left mouse button, or the
 * right button in a left-handed setup.
 *
 * Since: 3.4
 */
#define GDK_BUTTON_PRIMARY      (1)

/**
 * GDK_BUTTON_MIDDLE:
 *
 * The middle button.
 *
 * Since: 3.4
 */
#define GDK_BUTTON_MIDDLE       (2)

/**
 * GDK_BUTTON_SECONDARY:
 *
 * The secondary button. This is typically the right mouse button, or the
 * left button in a left-handed setup.
 *
 * Since: 3.4
 */
#define GDK_BUTTON_SECONDARY    (3)



typedef struct _GdkEventAny	    GdkEventAny;
typedef struct _GdkEventExpose	    GdkEventExpose;
typedef struct _GdkEventVisibility  GdkEventVisibility;
typedef struct _GdkEventMotion	    GdkEventMotion;
typedef struct _GdkEventButton	    GdkEventButton;
typedef struct _GdkEventTouch       GdkEventTouch;
typedef struct _GdkEventScroll      GdkEventScroll;  
typedef struct _GdkEventKey	    GdkEventKey;
typedef struct _GdkEventFocus	    GdkEventFocus;
typedef struct _GdkEventCrossing    GdkEventCrossing;
typedef struct _GdkEventConfigure   GdkEventConfigure;
typedef struct _GdkEventProperty    GdkEventProperty;
typedef struct _GdkEventSelection   GdkEventSelection;
typedef struct _GdkEventOwnerChange GdkEventOwnerChange;
typedef struct _GdkEventProximity   GdkEventProximity;
typedef struct _GdkEventDND         GdkEventDND;
typedef struct _GdkEventWindowState GdkEventWindowState;
typedef struct _GdkEventSetting     GdkEventSetting;
typedef struct _GdkEventGrabBroken  GdkEventGrabBroken;

typedef struct _GdkEventSequence    GdkEventSequence;

typedef union  _GdkEvent	    GdkEvent;

/**
 * GdkEventFunc:
 * @event: the #GdkEvent to process.
 * @data: (closure): user data set when the event handler was installed with
 *   gdk_event_handler_set().
 *
 * Specifies the type of function passed to gdk_event_handler_set() to
 * handle all GDK events.
 */
typedef void (*GdkEventFunc) (GdkEvent *event,
			      gpointer	data);

/* Event filtering */

/**
 * GdkXEvent:
 *
 * Used to represent native events (XEvents for the X11
 * backend, MSGs for Win32).
 */
typedef void GdkXEvent;	  /* Can be cast to window system specific
			   * even type, XEvent on X11, MSG on Win32.
			   */

/**
 * GdkFilterReturn:
 * @GDK_FILTER_CONTINUE: event not handled, continue processing.
 * @GDK_FILTER_TRANSLATE: native event translated into a GDK event and stored
 *  in the `event` structure that was passed in.
 * @GDK_FILTER_REMOVE: event handled, terminate processing.
 *
 * Specifies the result of applying a #GdkFilterFunc to a native event.
 */
typedef enum {
  GDK_FILTER_CONTINUE,	  /* Event not handled, continue processesing */
  GDK_FILTER_TRANSLATE,	  /* Native event translated into a GDK event and
                             stored in the "event" structure that was
                             passed in */
  GDK_FILTER_REMOVE	  /* Terminate processing, removing event */
} GdkFilterReturn;

/**
 * GdkFilterFunc:
 * @xevent: the native event to filter.
 * @event: the GDK event to which the X event will be translated.
 * @data: user data set when the filter was installed.
 *
 * Specifies the type of function used to filter native events before they are
 * converted to GDK events.
 *
 * When a filter is called, @event is unpopulated, except for
 * `event->window`. The filter may translate the native
 * event to a GDK event and store the result in @event, or handle it without
 * translation. If the filter translates the event and processing should
 * continue, it should return %GDK_FILTER_TRANSLATE.
 *
 * Returns: a #GdkFilterReturn value.
 */
typedef GdkFilterReturn (*GdkFilterFunc) (GdkXEvent *xevent,
					  GdkEvent *event,
					  gpointer  data);


/**
 * GdkEventType:
 * @GDK_NOTHING: a special code to indicate a null event.
 * @GDK_DELETE: the window manager has requested that the toplevel window be
 *   hidden or destroyed, usually when the user clicks on a special icon in the
 *   title bar.
 * @GDK_DESTROY: the window has been destroyed.
 * @GDK_EXPOSE: all or part of the window has become visible and needs to be
 *   redrawn.
 * @GDK_MOTION_NOTIFY: the pointer (usually a mouse) has moved.
 * @GDK_BUTTON_PRESS: a mouse button has been pressed.
 * @GDK_2BUTTON_PRESS: a mouse button has been double-clicked (clicked twice
 *   within a short period of time). Note that each click also generates a
 *   %GDK_BUTTON_PRESS event.
 * @GDK_DOUBLE_BUTTON_PRESS: alias for %GDK_2BUTTON_PRESS, added in 3.6.
 * @GDK_3BUTTON_PRESS: a mouse button has been clicked 3 times in a short period
 *   of time. Note that each click also generates a %GDK_BUTTON_PRESS event.
 * @GDK_TRIPLE_BUTTON_PRESS: alias for %GDK_3BUTTON_PRESS, added in 3.6.
 * @GDK_BUTTON_RELEASE: a mouse button has been released.
 * @GDK_KEY_PRESS: a key has been pressed.
 * @GDK_KEY_RELEASE: a key has been released.
 * @GDK_ENTER_NOTIFY: the pointer has entered the window.
 * @GDK_LEAVE_NOTIFY: the pointer has left the window.
 * @GDK_FOCUS_CHANGE: the keyboard focus has entered or left the window.
 * @GDK_CONFIGURE: the size, position or stacking order of the window has changed.
 *   Note that GTK+ discards these events for %GDK_WINDOW_CHILD windows.
 * @GDK_MAP: the window has been mapped.
 * @GDK_UNMAP: the window has been unmapped.
 * @GDK_PROPERTY_NOTIFY: a property on the window has been changed or deleted.
 * @GDK_SELECTION_CLEAR: the application has lost ownership of a selection.
 * @GDK_SELECTION_REQUEST: another application has requested a selection.
 * @GDK_SELECTION_NOTIFY: a selection has been received.
 * @GDK_PROXIMITY_IN: an input device has moved into contact with a sensing
 *   surface (e.g. a touchscreen or graphics tablet).
 * @GDK_PROXIMITY_OUT: an input device has moved out of contact with a sensing
 *   surface.
 * @GDK_DRAG_ENTER: the mouse has entered the window while a drag is in progress.
 * @GDK_DRAG_LEAVE: the mouse has left the window while a drag is in progress.
 * @GDK_DRAG_MOTION: the mouse has moved in the window while a drag is in
 *   progress.
 * @GDK_DRAG_STATUS: the status of the drag operation initiated by the window
 *   has changed.
 * @GDK_DROP_START: a drop operation onto the window has started.
 * @GDK_DROP_FINISHED: the drop operation initiated by the window has completed.
 * @GDK_CLIENT_EVENT: a message has been received from another application.
 * @GDK_VISIBILITY_NOTIFY: the window visibility status has changed.
 * @GDK_SCROLL: the scroll wheel was turned
 * @GDK_WINDOW_STATE: the state of a window has changed. See #GdkWindowState
 *   for the possible window states
 * @GDK_SETTING: a setting has been modified.
 * @GDK_OWNER_CHANGE: the owner of a selection has changed. This event type
 *   was added in 2.6
 * @GDK_GRAB_BROKEN: a pointer or keyboard grab was broken. This event type
 *   was added in 2.8.
 * @GDK_DAMAGE: the content of the window has been changed. This event type
 *   was added in 2.14.
 * @GDK_TOUCH_BEGIN: A new touch event sequence has just started. This event
 *   type was added in 3.4.
 * @GDK_TOUCH_UPDATE: A touch event sequence has been updated. This event type
 *   was added in 3.4.
 * @GDK_TOUCH_END: A touch event sequence has finished. This event type
 *   was added in 3.4.
 * @GDK_TOUCH_CANCEL: A touch event sequence has been canceled. This event type
 *   was added in 3.4.
 * @GDK_EVENT_LAST: marks the end of the GdkEventType enumeration. Added in 2.18
 *
 * Specifies the type of the event.
 *
 * Do not confuse these events with the signals that GTK+ widgets emit.
 * Although many of these events result in corresponding signals being emitted,
 * the events are often transformed or filtered along the way.
 *
 * In some language bindings, the values %GDK_2BUTTON_PRESS and
 * %GDK_3BUTTON_PRESS would translate into something syntactically
 * invalid (eg `Gdk.EventType.2ButtonPress`, where a
 * symbol is not allowed to start with a number). In that case, the
 * aliases %GDK_DOUBLE_BUTTON_PRESS and %GDK_TRIPLE_BUTTON_PRESS can
 * be used instead.
 */
typedef enum
{
  GDK_NOTHING		= -1,
  GDK_DELETE		= 0,
  GDK_DESTROY		= 1,
  GDK_EXPOSE		= 2,
  GDK_MOTION_NOTIFY	= 3,
  GDK_BUTTON_PRESS	= 4,
  GDK_2BUTTON_PRESS	= 5,
  GDK_DOUBLE_BUTTON_PRESS = GDK_2BUTTON_PRESS,
  GDK_3BUTTON_PRESS	= 6,
  GDK_TRIPLE_BUTTON_PRESS = GDK_3BUTTON_PRESS,
  GDK_BUTTON_RELEASE	= 7,
  GDK_KEY_PRESS		= 8,
  GDK_KEY_RELEASE	= 9,
  GDK_ENTER_NOTIFY	= 10,
  GDK_LEAVE_NOTIFY	= 11,
  GDK_FOCUS_CHANGE	= 12,
  GDK_CONFIGURE		= 13,
  GDK_MAP		= 14,
  GDK_UNMAP		= 15,
  GDK_PROPERTY_NOTIFY	= 16,
  GDK_SELECTION_CLEAR	= 17,
  GDK_SELECTION_REQUEST = 18,
  GDK_SELECTION_NOTIFY	= 19,
  GDK_PROXIMITY_IN	= 20,
  GDK_PROXIMITY_OUT	= 21,
  GDK_DRAG_ENTER        = 22,
  GDK_DRAG_LEAVE        = 23,
  GDK_DRAG_MOTION       = 24,
  GDK_DRAG_STATUS       = 25,
  GDK_DROP_START        = 26,
  GDK_DROP_FINISHED     = 27,
  GDK_CLIENT_EVENT	= 28,
  GDK_VISIBILITY_NOTIFY = 29,
  GDK_SCROLL            = 31,
  GDK_WINDOW_STATE      = 32,
  GDK_SETTING           = 33,
  GDK_OWNER_CHANGE      = 34,
  GDK_GRAB_BROKEN       = 35,
  GDK_DAMAGE            = 36,
  GDK_TOUCH_BEGIN       = 37,
  GDK_TOUCH_UPDATE      = 38,
  GDK_TOUCH_END         = 39,
  GDK_TOUCH_CANCEL      = 40,
  GDK_EVENT_LAST        /* helper variable for decls */
} GdkEventType;

/**
 * GdkVisibilityState:
 * @GDK_VISIBILITY_UNOBSCURED: the window is completely visible.
 * @GDK_VISIBILITY_PARTIAL: the window is partially visible.
 * @GDK_VISIBILITY_FULLY_OBSCURED: the window is not visible at all.
 *
 * Specifies the visiblity status of a window for a #GdkEventVisibility.
 */
typedef enum
{
  GDK_VISIBILITY_UNOBSCURED,
  GDK_VISIBILITY_PARTIAL,
  GDK_VISIBILITY_FULLY_OBSCURED
} GdkVisibilityState;

/**
 * GdkScrollDirection:
 * @GDK_SCROLL_UP: the window is scrolled up.
 * @GDK_SCROLL_DOWN: the window is scrolled down.
 * @GDK_SCROLL_LEFT: the window is scrolled to the left.
 * @GDK_SCROLL_RIGHT: the window is scrolled to the right.
 * @GDK_SCROLL_SMOOTH: the scrolling is determined by the delta values
 *   in #GdkEventScroll. See gdk_event_get_scroll_deltas(). Since: 3.4
 *
 * Specifies the direction for #GdkEventScroll.
 */
typedef enum
{
  GDK_SCROLL_UP,
  GDK_SCROLL_DOWN,
  GDK_SCROLL_LEFT,
  GDK_SCROLL_RIGHT,
  GDK_SCROLL_SMOOTH
} GdkScrollDirection;

/**
 * GdkNotifyType:
 * @GDK_NOTIFY_ANCESTOR: the window is entered from an ancestor or
 *   left towards an ancestor.
 * @GDK_NOTIFY_VIRTUAL: the pointer moves between an ancestor and an
 *   inferior of the window.
 * @GDK_NOTIFY_INFERIOR: the window is entered from an inferior or
 *   left towards an inferior.
 * @GDK_NOTIFY_NONLINEAR: the window is entered from or left towards
 *   a window which is neither an ancestor nor an inferior.
 * @GDK_NOTIFY_NONLINEAR_VIRTUAL: the pointer moves between two windows
 *   which are not ancestors of each other and the window is part of
 *   the ancestor chain between one of these windows and their least
 *   common ancestor.
 * @GDK_NOTIFY_UNKNOWN: an unknown type of enter/leave event occurred.
 *
 * Specifies the kind of crossing for #GdkEventCrossing.
 *
 * See the X11 protocol specification of LeaveNotify for
 * full details of crossing event generation.
 */
typedef enum
{
  GDK_NOTIFY_ANCESTOR		= 0,
  GDK_NOTIFY_VIRTUAL		= 1,
  GDK_NOTIFY_INFERIOR		= 2,
  GDK_NOTIFY_NONLINEAR		= 3,
  GDK_NOTIFY_NONLINEAR_VIRTUAL	= 4,
  GDK_NOTIFY_UNKNOWN		= 5
} GdkNotifyType;

/**
 * GdkCrossingMode:
 * @GDK_CROSSING_NORMAL: crossing because of pointer motion.
 * @GDK_CROSSING_GRAB: crossing because a grab is activated.
 * @GDK_CROSSING_UNGRAB: crossing because a grab is deactivated.
 * @GDK_CROSSING_GTK_GRAB: crossing because a GTK+ grab is activated.
 * @GDK_CROSSING_GTK_UNGRAB: crossing because a GTK+ grab is deactivated.
 * @GDK_CROSSING_STATE_CHANGED: crossing because a GTK+ widget changed
 *   state (e.g. sensitivity).
 * @GDK_CROSSING_TOUCH_BEGIN: crossing because a touch sequence has begun,
 *   this event is synthetic as the pointer might have not left the window.
 * @GDK_CROSSING_TOUCH_END: crossing because a touch sequence has ended,
 *   this event is synthetic as the pointer might have not left the window.
 * @GDK_CROSSING_DEVICE_SWITCH: crossing because of a device switch (i.e.
 *   a mouse taking control of the pointer after a touch device), this event
 *   is synthetic as the pointer didn't leave the window.
 *
 * Specifies the crossing mode for #GdkEventCrossing.
 */
typedef enum
{
  GDK_CROSSING_NORMAL,
  GDK_CROSSING_GRAB,
  GDK_CROSSING_UNGRAB,
  GDK_CROSSING_GTK_GRAB,
  GDK_CROSSING_GTK_UNGRAB,
  GDK_CROSSING_STATE_CHANGED,
  GDK_CROSSING_TOUCH_BEGIN,
  GDK_CROSSING_TOUCH_END,
  GDK_CROSSING_DEVICE_SWITCH
} GdkCrossingMode;

/**
 * GdkPropertyState:
 * @GDK_PROPERTY_NEW_VALUE: the property value was changed.
 * @GDK_PROPERTY_DELETE: the property was deleted.
 *
 * Specifies the type of a property change for a #GdkEventProperty.
 */
typedef enum
{
  GDK_PROPERTY_NEW_VALUE,
  GDK_PROPERTY_DELETE
} GdkPropertyState;

/**
 * GdkWindowState:
 * @GDK_WINDOW_STATE_WITHDRAWN: the window is not shown.
 * @GDK_WINDOW_STATE_ICONIFIED: the window is minimized.
 * @GDK_WINDOW_STATE_MAXIMIZED: the window is maximized.
 * @GDK_WINDOW_STATE_STICKY: the window is sticky.
 * @GDK_WINDOW_STATE_FULLSCREEN: the window is maximized without
 *   decorations.
 * @GDK_WINDOW_STATE_ABOVE: the window is kept above other windows.
 * @GDK_WINDOW_STATE_BELOW: the window is kept below other windows.
 * @GDK_WINDOW_STATE_FOCUSED: the window is presented as focused (with active decorations).
 * @GDK_WINDOW_STATE_TILED: the window is in a tiled state, Since 3.10
 *
 * Specifies the state of a toplevel window.
 */
typedef enum
{
  GDK_WINDOW_STATE_WITHDRAWN  = 1 << 0,
  GDK_WINDOW_STATE_ICONIFIED  = 1 << 1,
  GDK_WINDOW_STATE_MAXIMIZED  = 1 << 2,
  GDK_WINDOW_STATE_STICKY     = 1 << 3,
  GDK_WINDOW_STATE_FULLSCREEN = 1 << 4,
  GDK_WINDOW_STATE_ABOVE      = 1 << 5,
  GDK_WINDOW_STATE_BELOW      = 1 << 6,
  GDK_WINDOW_STATE_FOCUSED    = 1 << 7,
  GDK_WINDOW_STATE_TILED      = 1 << 8
} GdkWindowState;

/**
 * GdkSettingAction:
 * @GDK_SETTING_ACTION_NEW: a setting was added.
 * @GDK_SETTING_ACTION_CHANGED: a setting was changed.
 * @GDK_SETTING_ACTION_DELETED: a setting was deleted.
 *
 * Specifies the kind of modification applied to a setting in a
 * #GdkEventSetting.
 */
typedef enum
{
  GDK_SETTING_ACTION_NEW,
  GDK_SETTING_ACTION_CHANGED,
  GDK_SETTING_ACTION_DELETED
} GdkSettingAction;

/**
 * GdkOwnerChange:
 * @GDK_OWNER_CHANGE_NEW_OWNER: some other app claimed the ownership
 * @GDK_OWNER_CHANGE_DESTROY: the window was destroyed
 * @GDK_OWNER_CHANGE_CLOSE: the client was closed
 *
 * Specifies why a selection ownership was changed.
 */
typedef enum
{
  GDK_OWNER_CHANGE_NEW_OWNER,
  GDK_OWNER_CHANGE_DESTROY,
  GDK_OWNER_CHANGE_CLOSE
} GdkOwnerChange;

/**
 * GdkEventAny:
 * @type: the type of the event.
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 *
 * Contains the fields which are common to all event structs.
 * Any event pointer can safely be cast to a pointer to a #GdkEventAny to
 * access these fields.
 */
struct _GdkEventAny
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
};

/**
 * GdkEventExpose:
 * @type: the type of the event (%GDK_EXPOSE or %GDK_DAMAGE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @area: bounding box of @region.
 * @region: the region that needs to be redrawn.
 * @count: the number of contiguous %GDK_EXPOSE events following this one.
 *   The only use for this is “exposure compression”, i.e. handling all
 *   contiguous %GDK_EXPOSE events in one go, though GDK performs some
 *   exposure compression so this is not normally needed.
 *
 * Generated when all or part of a window becomes visible and needs to be
 * redrawn.
 */
struct _GdkEventExpose
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkRectangle area;
  cairo_region_t *region;
  gint count; /* If non-zero, how many more events follow. */
};

/**
 * GdkEventVisibility:
 * @type: the type of the event (%GDK_VISIBILITY_NOTIFY).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @state: the new visibility state (%GDK_VISIBILITY_FULLY_OBSCURED,
 *   %GDK_VISIBILITY_PARTIAL or %GDK_VISIBILITY_UNOBSCURED).
 *
 * Generated when the window visibility status has changed.
 */
struct _GdkEventVisibility
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkVisibilityState state;
};

/**
 * GdkEventMotion:
 * @type: the type of the event.
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @x: the x coordinate of the pointer relative to the window.
 * @y: the y coordinate of the pointer relative to the window.
 * @axes: @x, @y translated to the axes of @device, or %NULL if @device is
 *   the mouse.
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType.
 * @is_hint: set to 1 if this event is just a hint, see the
 *   %GDK_POINTER_MOTION_HINT_MASK value of #GdkEventMask.
 * @device: the master device that the event originated from. Use
 * gdk_event_get_source_device() to get the slave device.
 * @x_root: the x coordinate of the pointer relative to the root of the
 *   screen.
 * @y_root: the y coordinate of the pointer relative to the root of the
 *   screen.
 *
 * Generated when the pointer moves.
 */
struct _GdkEventMotion
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  gint16 is_hint;
  GdkDevice *device;
  gdouble x_root, y_root;
};

/**
 * GdkEventButton:
 * @type: the type of the event (%GDK_BUTTON_PRESS, %GDK_2BUTTON_PRESS,
 *   %GDK_3BUTTON_PRESS or %GDK_BUTTON_RELEASE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @x: the x coordinate of the pointer relative to the window.
 * @y: the y coordinate of the pointer relative to the window.
 * @axes: @x, @y translated to the axes of @device, or %NULL if @device is
 *   the mouse.
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType.
 * @button: the button which was pressed or released, numbered from 1 to 5.
 *   Normally button 1 is the left mouse button, 2 is the middle button,
 *   and 3 is the right button. On 2-button mice, the middle button can
 *   often be simulated by pressing both mouse buttons together.
 * @device: the master device that the event originated from. Use
 * gdk_event_get_source_device() to get the slave device.
 * @x_root: the x coordinate of the pointer relative to the root of the
 *   screen.
 * @y_root: the y coordinate of the pointer relative to the root of the
 *   screen.
 *
 * Used for button press and button release events. The
 * @type field will be one of %GDK_BUTTON_PRESS,
 * %GDK_2BUTTON_PRESS, %GDK_3BUTTON_PRESS or %GDK_BUTTON_RELEASE,
 *
 * Double and triple-clicks result in a sequence of events being received.
 * For double-clicks the order of events will be:
 *
 * - %GDK_BUTTON_PRESS
 * - %GDK_BUTTON_RELEASE
 * - %GDK_BUTTON_PRESS
 * - %GDK_2BUTTON_PRESS
 * - %GDK_BUTTON_RELEASE
 *
 * Note that the first click is received just like a normal
 * button press, while the second click results in a %GDK_2BUTTON_PRESS
 * being received just after the %GDK_BUTTON_PRESS.
 *
 * Triple-clicks are very similar to double-clicks, except that
 * %GDK_3BUTTON_PRESS is inserted after the third click. The order of the
 * events is:
 *
 * - %GDK_BUTTON_PRESS
 * - %GDK_BUTTON_RELEASE
 * - %GDK_BUTTON_PRESS
 * - %GDK_2BUTTON_PRESS
 * - %GDK_BUTTON_RELEASE
 * - %GDK_BUTTON_PRESS
 * - %GDK_3BUTTON_PRESS
 * - %GDK_BUTTON_RELEASE
 *
 * For a double click to occur, the second button press must occur within
 * 1/4 of a second of the first. For a triple click to occur, the third
 * button press must also occur within 1/2 second of the first button press.
 */
struct _GdkEventButton
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  guint button;
  GdkDevice *device;
  gdouble x_root, y_root;
};

/**
 * GdkEventTouch:
 * @type: the type of the event (%GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
 *   %GDK_TOUCH_END, %GDK_TOUCH_CANCEL)
 * @window: the window which received the event
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @x: the x coordinate of the pointer relative to the window
 * @y: the y coordinate of the pointer relative to the window
 * @axes: @x, @y translated to the axes of @device, or %NULL if @device is
 *   the mouse
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType
 * @sequence: the event sequence that the event belongs to
 * @emulating_pointer: whether the event should be used for emulating
 *   pointer event
 * @device: the master device that the event originated from. Use
 * gdk_event_get_source_device() to get the slave device.
 * @x_root: the x coordinate of the pointer relative to the root of the
 *   screen
 * @y_root: the y coordinate of the pointer relative to the root of the
 *   screen
 *
 * Used for touch events.
 * @type field will be one of %GDK_TOUCH_BEGIN, %GDK_TOUCH_UPDATE,
 * %GDK_TOUCH_END or %GDK_TOUCH_CANCEL.
 *
 * Touch events are grouped into sequences by means of the @sequence
 * field, which can also be obtained with gdk_event_get_event_sequence().
 * Each sequence begins with a %GDK_TOUCH_BEGIN event, followed by
 * any number of %GDK_TOUCH_UPDATE events, and ends with a %GDK_TOUCH_END
 * (or %GDK_TOUCH_CANCEL) event. With multitouch devices, there may be
 * several active sequences at the same time.
 */
struct _GdkEventTouch
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble *axes;
  guint state;
  GdkEventSequence *sequence;
  gboolean emulating_pointer;
  GdkDevice *device;
  gdouble x_root, y_root;
};

/**
 * GdkEventScroll:
 * @type: the type of the event (%GDK_SCROLL).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @x: the x coordinate of the pointer relative to the window.
 * @y: the y coordinate of the pointer relative to the window.
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType.
 * @direction: the direction to scroll to (one of %GDK_SCROLL_UP,
 *   %GDK_SCROLL_DOWN, %GDK_SCROLL_LEFT, %GDK_SCROLL_RIGHT or
 *   %GDK_SCROLL_SMOOTH).
 * @device: the master device that the event originated from. Use
 * gdk_event_get_source_device() to get the slave device.
 * @x_root: the x coordinate of the pointer relative to the root of the
 *   screen.
 * @y_root: the y coordinate of the pointer relative to the root of the
 *   screen.
 * @delta_x: the x coordinate of the scroll delta
 * @delta_y: the y coordinate of the scroll delta
 *
 * Generated from button presses for the buttons 4 to 7. Wheel mice are
 * usually configured to generate button press events for buttons 4 and 5
 * when the wheel is turned.
 *
 * Some GDK backends can also generate 'smooth' scroll events, which
 * can be recognized by the %GDK_SCROLL_SMOOTH scroll direction. For
 * these, the scroll deltas can be obtained with
 * gdk_event_get_scroll_deltas().
 */
struct _GdkEventScroll
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  gdouble x;
  gdouble y;
  guint state;
  GdkScrollDirection direction;
  GdkDevice *device;
  gdouble x_root, y_root;
  gdouble delta_x;
  gdouble delta_y;
};

/**
 * GdkEventKey:
 * @type: the type of the event (%GDK_KEY_PRESS or %GDK_KEY_RELEASE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType.
 * @keyval: the key that was pressed or released. See the
 *   `gdk/gdkkeysyms.h` header file for a
 *   complete list of GDK key codes.
 * @length: the length of @string.
 * @string: a string containing an approximation of the text that
 *   would result from this keypress. The only correct way to handle text
 *   input of text is using input methods (see #GtkIMContext), so this
 *   field is deprecated and should never be used.
 *   (gdk_unicode_to_keyval() provides a non-deprecated way of getting
 *   an approximate translation for a key.) The string is encoded in the
 *   encoding of the current locale (Note: this for backwards compatibility:
 *   strings in GTK+ and GDK are typically in UTF-8.) and NUL-terminated.
 *   In some cases, the translation of the key code will be a single
 *   NUL byte, in which case looking at @length is necessary to distinguish
 *   it from the an empty translation.
 * @hardware_keycode: the raw code of the key that was pressed or released.
 * @group: the keyboard group.
 * @is_modifier: a flag that indicates if @hardware_keycode is mapped to a
 *   modifier. Since 2.10
 *
 * Describes a key press or key release event.
 */
struct _GdkEventKey
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  guint state;
  guint keyval;
  gint length;
  gchar *string;
  guint16 hardware_keycode;
  guint8 group;
  guint is_modifier : 1;
};

/**
 * GdkEventCrossing:
 * @type: the type of the event (%GDK_ENTER_NOTIFY or %GDK_LEAVE_NOTIFY).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @subwindow: the window that was entered or left.
 * @time: the time of the event in milliseconds.
 * @x: the x coordinate of the pointer relative to the window.
 * @y: the y coordinate of the pointer relative to the window.
 * @x_root: the x coordinate of the pointer relative to the root of the screen.
 * @y_root: the y coordinate of the pointer relative to the root of the screen.
 * @mode: the crossing mode (%GDK_CROSSING_NORMAL, %GDK_CROSSING_GRAB,
 *  %GDK_CROSSING_UNGRAB, %GDK_CROSSING_GTK_GRAB, %GDK_CROSSING_GTK_UNGRAB or
 *  %GDK_CROSSING_STATE_CHANGED).  %GDK_CROSSING_GTK_GRAB, %GDK_CROSSING_GTK_UNGRAB,
 *  and %GDK_CROSSING_STATE_CHANGED were added in 2.14 and are always synthesized,
 *  never native.
 * @detail: the kind of crossing that happened (%GDK_NOTIFY_INFERIOR,
 *  %GDK_NOTIFY_ANCESTOR, %GDK_NOTIFY_VIRTUAL, %GDK_NOTIFY_NONLINEAR or
 *  %GDK_NOTIFY_NONLINEAR_VIRTUAL).
 * @focus: %TRUE if @window is the focus window or an inferior.
 * @state: (type GdkModifierType): a bit-mask representing the state of
 *   the modifier keys (e.g. Control, Shift and Alt) and the pointer
 *   buttons. See #GdkModifierType.
 *
 * Generated when the pointer enters or leaves a window.
 */
struct _GdkEventCrossing
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindow *subwindow;
  guint32 time;
  gdouble x;
  gdouble y;
  gdouble x_root;
  gdouble y_root;
  GdkCrossingMode mode;
  GdkNotifyType detail;
  gboolean focus;
  guint state;
};

/**
 * GdkEventFocus:
 * @type: the type of the event (%GDK_FOCUS_CHANGE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @in: %TRUE if the window has gained the keyboard focus, %FALSE if
 *   it has lost the focus.
 *
 * Describes a change of keyboard focus.
 */
struct _GdkEventFocus
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint16 in;
};

/**
 * GdkEventConfigure:
 * @type: the type of the event (%GDK_CONFIGURE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @x: the new x coordinate of the window, relative to its parent.
 * @y: the new y coordinate of the window, relative to its parent.
 * @width: the new width of the window.
 * @height: the new height of the window.
 *
 * Generated when a window size or position has changed.
 */
struct _GdkEventConfigure
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gint x, y;
  gint width;
  gint height;
};

/**
 * GdkEventProperty:
 * @type: the type of the event (%GDK_PROPERTY_NOTIFY).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @atom: the property that was changed.
 * @time: the time of the event in milliseconds.
 * @state: (type GdkPropertyState): whether the property was changed
 *   (%GDK_PROPERTY_NEW_VALUE) or deleted (%GDK_PROPERTY_DELETE).
 *
 * Describes a property change on a window.
 */
struct _GdkEventProperty
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkAtom atom;
  guint32 time;
  guint state;
};

/**
 * GdkEventSelection:
 * @type: the type of the event (%GDK_SELECTION_CLEAR,
 *   %GDK_SELECTION_NOTIFY or %GDK_SELECTION_REQUEST).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @selection: the selection.
 * @target: the target to which the selection should be converted.
 * @property: the property in which to place the result of the conversion.
 * @time: the time of the event in milliseconds.
 * @requestor: the window on which to place @property or %NULL if none.
 *
 * Generated when a selection is requested or ownership of a selection
 * is taken over by another client application.
 */
struct _GdkEventSelection
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkAtom selection;
  GdkAtom target;
  GdkAtom property;
  guint32 time;
  GdkWindow *requestor;
};

/**
 * GdkEventOwnerChange:
 * @type: the type of the event (%GDK_OWNER_CHANGE).
 * @window: the window which received the event
 * @send_event: %TRUE if the event was sent explicitly.
 * @owner: the new owner of the selection, or %NULL if there is none
 * @reason: the reason for the ownership change as a #GdkOwnerChange value
 * @selection: the atom identifying the selection
 * @time: the timestamp of the event
 * @selection_time: the time at which the selection ownership was taken
 *   over
 *
 * Generated when the owner of a selection changes. On X11, this
 * information is only available if the X server supports the XFIXES
 * extension.
 *
 * Since: 2.6
 */
struct _GdkEventOwnerChange
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindow *owner;
  GdkOwnerChange reason;
  GdkAtom selection;
  guint32 time;
  guint32 selection_time;
};

/**
 * GdkEventProximity:
 * @type: the type of the event (%GDK_PROXIMITY_IN or %GDK_PROXIMITY_OUT).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @time: the time of the event in milliseconds.
 * @device: the master device that the event originated from. Use
 * gdk_event_get_source_device() to get the slave device.
 *
 * Proximity events are generated when using GDK's wrapper for the
 * XInput extension. The XInput extension is an add-on for standard X
 * that allows you to use nonstandard devices such as graphics tablets.
 * A proximity event indicates that the stylus has moved in or out of
 * contact with the tablet, or perhaps that the user's finger has moved
 * in or out of contact with a touch screen.
 *
 * This event type will be used pretty rarely. It only is important for
 * XInput aware programs that are drawing their own cursor.
 */
struct _GdkEventProximity
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  guint32 time;
  GdkDevice *device;
};

/**
 * GdkEventSetting:
 * @type: the type of the event (%GDK_SETTING).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @action: what happened to the setting (%GDK_SETTING_ACTION_NEW,
 *   %GDK_SETTING_ACTION_CHANGED or %GDK_SETTING_ACTION_DELETED).
 * @name: the name of the setting.
 *
 * Generated when a setting is modified.
 */
struct _GdkEventSetting
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkSettingAction action;
  char *name;
};

/**
 * GdkEventWindowState:
 * @type: the type of the event (%GDK_WINDOW_STATE).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @changed_mask: mask specifying what flags have changed.
 * @new_window_state: the new window state, a combination of
 *   #GdkWindowState bits.
 *
 * Generated when the state of a toplevel window changes.
 */
struct _GdkEventWindowState
{
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkWindowState changed_mask;
  GdkWindowState new_window_state;
};

/**
 * GdkEventGrabBroken:
 * @type: the type of the event (%GDK_GRAB_BROKEN)
 * @window: the window which received the event, i.e. the window
 *   that previously owned the grab
 * @send_event: %TRUE if the event was sent explicitly.
 * @keyboard: %TRUE if a keyboard grab was broken, %FALSE if a pointer
 *   grab was broken
 * @implicit: %TRUE if the broken grab was implicit
 * @grab_window: If this event is caused by another grab in the same
 *   application, @grab_window contains the new grab window. Otherwise
 *   @grab_window is %NULL.
 *
 * Generated when a pointer or keyboard grab is broken. On X11, this happens
 * when the grab window becomes unviewable (i.e. it or one of its ancestors
 * is unmapped), or if the same application grabs the pointer or keyboard
 * again. Note that implicit grabs (which are initiated by button presses)
 * can also cause #GdkEventGrabBroken events.
 *
 * Since: 2.8
 */
struct _GdkEventGrabBroken {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  gboolean keyboard;
  gboolean implicit;
  GdkWindow *grab_window;
};

/**
 * GdkEventDND:
 * @type: the type of the event (%GDK_DRAG_ENTER, %GDK_DRAG_LEAVE,
 *   %GDK_DRAG_MOTION, %GDK_DRAG_STATUS, %GDK_DROP_START or
 *   %GDK_DROP_FINISHED).
 * @window: the window which received the event.
 * @send_event: %TRUE if the event was sent explicitly.
 * @context: the #GdkDragContext for the current DND operation.
 * @time: the time of the event in milliseconds.
 * @x_root: the x coordinate of the pointer relative to the root of the
 *   screen, only set for %GDK_DRAG_MOTION and %GDK_DROP_START.
 * @y_root: the y coordinate of the pointer relative to the root of the
 *   screen, only set for %GDK_DRAG_MOTION and %GDK_DROP_START.
 *
 * Generated during DND operations.
 */
struct _GdkEventDND {
  GdkEventType type;
  GdkWindow *window;
  gint8 send_event;
  GdkDragContext *context;

  guint32 time;
  gshort x_root, y_root;
};

/**
 * GdkEvent:
 * @type: the #GdkEventType
 * @any: a #GdkEventAny
 * @expose: a #GdkEventExpose
 * @visibility: a #GdkEventVisibility
 * @motion: a #GdkEventMotion
 * @button: a #GdkEventButton
 * @touch: a #GdkEventTouch
 * @scroll: a #GdkEventScroll
 * @key: a #GdkEventKey
 * @crossing: a #GdkEventCrossing
 * @focus_change: a #GdkEventFocus
 * @configure: a #GdkEventConfigure
 * @property: a #GdkEventProperty
 * @selection: a #GdkEventSelection
 * @owner_change: a #GdkEventOwnerChange
 * @proximity: a #GdkEventProximity
 * @dnd: a #GdkEventDND
 * @window_state: a #GdkEventWindowState
 * @setting: a #GdkEventSetting
 * @grab_broken: a #GdkEventGrabBroken
 *
 * A #GdkEvent contains a union of all of the event types,
 * and allows access to the data fields in a number of ways.
 *
 * The event type is always the first field in all of the event types, and
 * can always be accessed with the following code, no matter what type of
 * event it is:
 * |[<!-- language="C" -->
 *   GdkEvent *event;
 *   GdkEventType type;
 *
 *   type = event->type;
 * ]|
 *
 * To access other fields of the event, the pointer to the event
 * can be cast to the appropriate event type, or the union member
 * name can be used. For example if the event type is %GDK_BUTTON_PRESS
 * then the x coordinate of the button press can be accessed with:
 * |[<!-- language="C" -->
 *   GdkEvent *event;
 *   gdouble x;
 *
 *   x = ((GdkEventButton*)event)->x;
 * ]|
 * or:
 * |[<!-- language="C" -->
 *   GdkEvent *event;
 *   gdouble x;
 *
 *   x = event->button.x;
 * ]|
 */
union _GdkEvent
{
  GdkEventType		    type;
  GdkEventAny		    any;
  GdkEventExpose	    expose;
  GdkEventVisibility	    visibility;
  GdkEventMotion	    motion;
  GdkEventButton	    button;
  GdkEventTouch             touch;
  GdkEventScroll            scroll;
  GdkEventKey		    key;
  GdkEventCrossing	    crossing;
  GdkEventFocus		    focus_change;
  GdkEventConfigure	    configure;
  GdkEventProperty	    property;
  GdkEventSelection	    selection;
  GdkEventOwnerChange  	    owner_change;
  GdkEventProximity	    proximity;
  GdkEventDND               dnd;
  GdkEventWindowState       window_state;
  GdkEventSetting           setting;
  GdkEventGrabBroken        grab_broken;
};

GDK_AVAILABLE_IN_ALL
GType     gdk_event_get_type            (void) G_GNUC_CONST;

GDK_AVAILABLE_IN_ALL
gboolean  gdk_events_pending	 	(void);
GDK_AVAILABLE_IN_ALL
GdkEvent* gdk_event_get			(void);

GDK_AVAILABLE_IN_ALL
GdkEvent* gdk_event_peek                (void);
GDK_AVAILABLE_IN_ALL
void      gdk_event_put	 		(const GdkEvent *event);

GDK_AVAILABLE_IN_ALL
GdkEvent* gdk_event_new                 (GdkEventType    type);
GDK_AVAILABLE_IN_ALL
GdkEvent* gdk_event_copy     		(const GdkEvent *event);
GDK_AVAILABLE_IN_ALL
void	  gdk_event_free     		(GdkEvent 	*event);

GDK_AVAILABLE_IN_3_10
GdkWindow *gdk_event_get_window         (const GdkEvent *event);

GDK_AVAILABLE_IN_ALL
guint32   gdk_event_get_time            (const GdkEvent  *event);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_event_get_state           (const GdkEvent  *event,
                                         GdkModifierType *state);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_event_get_coords		(const GdkEvent  *event,
					 gdouble	 *x_win,
					 gdouble	 *y_win);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_event_get_root_coords	(const GdkEvent *event,
					 gdouble	*x_root,
					 gdouble	*y_root);
GDK_AVAILABLE_IN_3_2
gboolean  gdk_event_get_button          (const GdkEvent *event,
                                         guint          *button);
GDK_AVAILABLE_IN_3_2
gboolean  gdk_event_get_click_count     (const GdkEvent *event,
                                         guint          *click_count);
GDK_AVAILABLE_IN_3_2
gboolean  gdk_event_get_keyval          (const GdkEvent *event,
                                         guint          *keyval);
GDK_AVAILABLE_IN_3_2
gboolean  gdk_event_get_keycode         (const GdkEvent *event,
                                         guint16        *keycode);
GDK_AVAILABLE_IN_3_2
gboolean gdk_event_get_scroll_direction (const GdkEvent *event,
                                         GdkScrollDirection *direction);
GDK_AVAILABLE_IN_3_4
gboolean  gdk_event_get_scroll_deltas   (const GdkEvent *event,
                                         gdouble         *delta_x,
                                         gdouble         *delta_y);

GDK_AVAILABLE_IN_ALL
gboolean  gdk_event_get_axis            (const GdkEvent  *event,
                                         GdkAxisUse       axis_use,
                                         gdouble         *value);
GDK_AVAILABLE_IN_ALL
void       gdk_event_set_device         (GdkEvent        *event,
                                         GdkDevice       *device);
GDK_AVAILABLE_IN_ALL
GdkDevice* gdk_event_get_device         (const GdkEvent  *event);
GDK_AVAILABLE_IN_ALL
void       gdk_event_set_source_device  (GdkEvent        *event,
                                         GdkDevice       *device);
GDK_AVAILABLE_IN_ALL
GdkDevice* gdk_event_get_source_device  (const GdkEvent  *event);
GDK_AVAILABLE_IN_ALL
void       gdk_event_request_motions    (const GdkEventMotion *event);
GDK_AVAILABLE_IN_3_4
gboolean   gdk_event_triggers_context_menu (const GdkEvent *event);

GDK_AVAILABLE_IN_ALL
gboolean  gdk_events_get_distance       (GdkEvent        *event1,
                                         GdkEvent        *event2,
                                         gdouble         *distance);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_events_get_angle          (GdkEvent        *event1,
                                         GdkEvent        *event2,
                                         gdouble         *angle);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_events_get_center         (GdkEvent        *event1,
                                         GdkEvent        *event2,
                                         gdouble         *x,
                                         gdouble         *y);

GDK_AVAILABLE_IN_ALL
void	  gdk_event_handler_set 	(GdkEventFunc    func,
					 gpointer        data,
					 GDestroyNotify  notify);

GDK_AVAILABLE_IN_ALL
void       gdk_event_set_screen         (GdkEvent        *event,
                                         GdkScreen       *screen);
GDK_AVAILABLE_IN_ALL
GdkScreen *gdk_event_get_screen         (const GdkEvent  *event);

GDK_AVAILABLE_IN_3_4
GdkEventSequence *gdk_event_get_event_sequence (const GdkEvent *event);

GDK_AVAILABLE_IN_3_10
GdkEventType gdk_event_get_event_type   (const GdkEvent *event);

GDK_AVAILABLE_IN_ALL
void	  gdk_set_show_events		(gboolean	 show_events);
GDK_AVAILABLE_IN_ALL
gboolean  gdk_get_show_events		(void);

#ifndef GDK_MULTIHEAD_SAFE

GDK_AVAILABLE_IN_ALL
gboolean gdk_setting_get                (const gchar    *name,
                                         GValue         *value);

#endif /* GDK_MULTIHEAD_SAFE */

G_END_DECLS

#endif /* __GDK_EVENTS_H__ */