summaryrefslogtreecommitdiffstats
path: root/src/corelib/kernel/qobject.cpp
blob: eb1bd0b2aed745ad0885adfc08d840af7de47549 (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
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore 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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qobject.h"
#include "qobject_p.h"

#include "qabstracteventdispatcher.h"
#include "qcoreapplication.h"
#include "qcoreapplication_p.h"
#include "qvariant.h"
#include "qmetaobject.h"
#include <qregexp.h>
#include <qthread.h>
#include <private/qthread_p.h>
#include <qdebug.h>
#include <qhash.h>
#include <qpair.h>
#include <qvarlengtharray.h>
#include <qset.h>
#include <qsemaphore.h>

#include <private/qorderedmutexlocker_p.h>
#include <private/qmutexpool_p.h>

#include <new>

#include <ctype.h>
#include <limits.h>

QT_BEGIN_NAMESPACE

static int DIRECT_CONNECTION_ONLY = 0;

static int *queuedConnectionTypes(const QList<QByteArray> &typeNames)
{
    int *types = new int [typeNames.count() + 1];
    for (int i = 0; i < typeNames.count(); ++i) {
        const QByteArray typeName = typeNames.at(i);
        if (typeName.endsWith('*'))
            types[i] = QMetaType::VoidStar;
        else
            types[i] = QMetaType::type(typeName);

        if (!types[i]) {
            qWarning("QObject::connect: Cannot queue arguments of type '%s'\n"
                     "(Make sure '%s' is registered using qRegisterMetaType().)",
                     typeName.constData(), typeName.constData());
            delete [] types;
            return 0;
        }
    }
    types[typeNames.count()] = 0;

    return types;
}

static QBasicAtomicPointer<QMutexPool> signalSlotMutexes = Q_BASIC_ATOMIC_INITIALIZER(0);
static QBasicAtomicInt objectCount = Q_BASIC_ATOMIC_INITIALIZER(0);

/** \internal
 * mutex to be locked when accessing the connectionlists or the senders list
 */
static QMutex *signalSlotLock(const QObject *o)
{
    if (!signalSlotMutexes) {
        QMutexPool *mp = new QMutexPool;
        if (!signalSlotMutexes.testAndSetOrdered(0, mp)) {
            delete mp;
        }
    }
    return signalSlotMutexes->get(o);
}

extern "C" Q_CORE_EXPORT void qt_addObject(QObject *)
{
    objectCount.ref();
}

extern "C" Q_CORE_EXPORT void qt_removeObject(QObject *)
{
    if(!objectCount.deref()) {
        QMutexPool *old = signalSlotMutexes.fetchAndStoreAcquire(0);
        delete old;
    }
}

QObjectPrivate::QObjectPrivate(int version)
    : threadData(0), currentSender(0), currentChildBeingDeleted(0), connectionLists(0), senders(0)
{
    if (version != QObjectPrivateVersion)
        qFatal("Cannot mix incompatible Qt libraries");

    // QObjectData initialization
    q_ptr = 0;
    parent = 0;                                 // no parent yet. It is set by setParent()
    isWidget = false;                           // assume not a widget object
    pendTimer = false;                          // no timers yet
    blockSig = false;                           // not blocking signals
    wasDeleted = false;                         // double-delete catcher
    sendChildEvents = true;                     // if we should send ChildInsert and ChildRemove events to parent
    receiveChildEvents = true;
    postedEvents = 0;
    extraData = 0;
    connectedSignals = 0;
    inEventHandler = false;
    inThreadChangeEvent = false;
    deleteWatch = 0;
    hasGuards = false;
}

QObjectPrivate::~QObjectPrivate()
{
    if (deleteWatch)
        *deleteWatch = 1;
#ifndef QT_NO_USERDATA
    if (extraData)
        qDeleteAll(extraData->userData);
    delete extraData;
#endif
}


int *QObjectPrivate::setDeleteWatch(QObjectPrivate *d, int *w) {
    int *old = d->deleteWatch;
    d->deleteWatch = w;
    return old;
}


void QObjectPrivate::resetDeleteWatch(QObjectPrivate *d, int *oldWatch, int deleteWatch) {
    if (!deleteWatch)
        d->deleteWatch = oldWatch;

    if (oldWatch)
        *oldWatch = deleteWatch;
}





#ifdef QT3_SUPPORT
void QObjectPrivate::sendPendingChildInsertedEvents()
{
    Q_Q(QObject);
    for (int i = 0; i < pendingChildInsertedEvents.size(); ++i) {
        QObject *c = pendingChildInsertedEvents.at(i);
        if (!c)
            continue;
        QChildEvent childEvent(QEvent::ChildInserted, c);
        QCoreApplication::sendEvent(q, &childEvent);
    }
    pendingChildInsertedEvents.clear();
}

void QObjectPrivate::removePendingChildInsertedEvents(QObject *child)
{
    if (!child) {
        pendingChildInsertedEvents.clear();
        return;
    }

    // the QObject destructor calls QObject::removeChild, which calls
    // QCoreApplication::sendEvent() directly.  this can happen while the event
    // loop is in the middle of posting events, and when we get here, we may
    // not have any more posted events for this object.

    // if this is a child remove event and the child insert hasn't
    // been dispatched yet, kill that insert
    for (int i = 0; i < pendingChildInsertedEvents.size(); ++i) {
        QObject *&c = pendingChildInsertedEvents[i];
        if (c == child)
            c = 0;
    }
}
#endif


class QObjectConnectionListVector : public QVector<QObjectPrivate::ConnectionList>
{
public:
    bool orphaned;
    bool dirty;
    int inUse;
    QObjectPrivate::ConnectionList allsignals;

    QObjectConnectionListVector()
        : QVector<QObjectPrivate::ConnectionList>(), orphaned(false), dirty(false), inUse(0)
    { }

    const QObjectPrivate::ConnectionList &at(int at) const
    {
        if (at < 0)
            return allsignals;
        return QVector<QObjectPrivate::ConnectionList>::at(at);
    }
    QObjectPrivate::ConnectionList &operator[](int at)
    {
        if (at < 0)
            return allsignals;
        return QVector<QObjectPrivate::ConnectionList>::operator[](at);
    }
};

// Used by QAccessibleWidget
bool QObjectPrivate::isSender(const QObject *receiver, const char *signal) const
{
    Q_Q(const QObject);
    int signal_index = q->metaObject()->indexOfSignal(signal);
    if (signal_index < 0)
        return false;
    QMutexLocker locker(signalSlotLock(q));
    if (connectionLists) {
        if (signal_index < connectionLists->count()) {
            const ConnectionList &connectionList = connectionLists->at(signal_index);
            for (int i = 0; i < connectionList.count(); ++i) {
                const QObjectPrivate::Connection *c = connectionList.at(i);
                if (c->receiver == receiver)
                    return true;
            }
        }
    }
    return false;
}

// Used by QAccessibleWidget
QObjectList QObjectPrivate::receiverList(const char *signal) const
{
    Q_Q(const QObject);
    QObjectList returnValue;
    int signal_index = q->metaObject()->indexOfSignal(signal);
    if (signal_index < 0)
        return returnValue;
    QMutexLocker locker(signalSlotLock(q));
    if (connectionLists) {
        if (signal_index < connectionLists->count()) {
            const ConnectionList &connectionList = connectionLists->at(signal_index);
            for (int i = 0; i < connectionList.count(); ++i) {
                const QObjectPrivate::Connection *c = connectionList.at(i);
                if (c->receiver)
                    returnValue << c->receiver;
            }
        }
    }
    return returnValue;
}

// Used by QAccessibleWidget
QObjectList QObjectPrivate::senderList() const
{
    QObjectList returnValue;
    QMutexLocker locker(signalSlotLock(q_func()));
    for (Connection *c = senders; c; c = c->next)
        returnValue << c->sender;
    return returnValue;
}

void QObjectPrivate::addConnection(int signal, Connection *c)
{
    if (!connectionLists)
        connectionLists = new QObjectConnectionListVector();
    if (signal >= connectionLists->count())
        connectionLists->resize(signal + 1);

    ConnectionList &connectionList = (*connectionLists)[signal];
    connectionList.append(c);
    cleanConnectionLists();
}

void QObjectPrivate::cleanConnectionLists()
{
    if (connectionLists->dirty && !connectionLists->inUse) {
        // remove broken connections
        for (int signal = -1; signal < connectionLists->count(); ++signal) {
            QObjectPrivate::ConnectionList &connectionList = (*connectionLists)[signal];
            for (int i = 0; i < connectionList.count(); ++i) {
                QObjectPrivate::Connection *c = connectionList.at(i);
                if (!c->receiver) {
                    delete c;
                    connectionList.removeAt(i--);
                }
            }
        }
        connectionLists->dirty = false;
    }
}

QObjectPrivate::Sender *QObjectPrivate::setCurrentSender(QObject *receiver,
                                                         Sender *sender)
{
    Sender *previousSender = receiver->d_func()->currentSender;
    receiver->d_func()->currentSender = sender;
    return previousSender;
}

void QObjectPrivate::resetCurrentSender(QObject *receiver,
                                        Sender *currentSender,
                                        Sender *previousSender)
{
    // ref is set to zero when this object is deleted during the metacall
    if (currentSender->ref == 1)
        receiver->d_func()->currentSender = previousSender;
    // if we've recursed, we need to tell the caller about the objects deletion
    if (previousSender)
        previousSender->ref = currentSender->ref;
}


typedef QMultiHash<QObject *, QObject **> GuardHash;
Q_GLOBAL_STATIC(GuardHash, guardHash)
Q_GLOBAL_STATIC(QMutex, guardHashLock)

/*!\internal
 */
void QMetaObject::addGuard(QObject **ptr)
{
    if (!*ptr)
        return;
    GuardHash *hash = guardHash();
    if (!hash) {
        *ptr = 0;
        return;
    }
    QMutexLocker locker(guardHashLock());
    QObjectPrivate::get(*ptr)->hasGuards = true;
    hash->insert(*ptr, ptr);
}

/*!\internal
 */
void QMetaObject::removeGuard(QObject **ptr)
{
    if (!*ptr)
        return;
    GuardHash *hash = guardHash();
    if (!hash)
        return;
    QMutexLocker locker(guardHashLock());
    GuardHash::iterator it = hash->find(*ptr);
    const GuardHash::iterator end = hash->end();
    bool more = false; //if the QObject has more pointer attached to it.
    for (; it.key() == *ptr && it != end; ++it) {
        if (it.value() == ptr) {
            it = hash->erase(it);
            if (!more) more = (it != end && it.key() == *ptr);
            break;
        }
        more = true;
    }
    if (!more)
        QObjectPrivate::get(*ptr)->hasGuards = false;
}

/*!\internal
 */
void QMetaObject::changeGuard(QObject **ptr, QObject *o)
{
    GuardHash *hash = guardHash();
    if (!hash) {
        *ptr = 0;
        return;
    }
    QMutexLocker locker(guardHashLock());
    if (*ptr) {
        bool more = false; //if the QObject has more pointer attached to it.
        GuardHash::iterator it = hash->find(*ptr);
        const GuardHash::iterator end = hash->end();
        for (; it.key() == *ptr && it != end; ++it) {
            if (it.value() == ptr) {
                it = hash->erase(it);
                if (!more) more = (it != end && it.key() == *ptr);
                break;
            }
            more = true;
        }
        if (!more)
            QObjectPrivate::get(*ptr)->hasGuards = false;
    }
    *ptr = o;
    if (*ptr) {
        hash->insert(*ptr, ptr);
        QObjectPrivate::get(*ptr)->hasGuards = true;
    }
}

/*! \internal
 */
void QObjectPrivate::clearGuards(QObject *object)
{
    if (!QObjectPrivate::get(object)->hasGuards)
        return;
    GuardHash *hash = guardHash();
    if (hash) {
        QMutexLocker locker(guardHashLock());
        GuardHash::iterator it = hash->find(object);
        const GuardHash::iterator end = hash->end();
        while (it.key() == object && it != end) {
            *it.value() = 0;
            it = hash->erase(it);
        }
    }
}

/*! \internal
 */
QMetaCallEvent::QMetaCallEvent(int id, const QObject *sender, int signalId,
                               int nargs, int *types, void **args, QSemaphore *semaphore)
    : QEvent(MetaCall), id_(id), sender_(sender), signalId_(signalId),
      nargs_(nargs), types_(types), args_(args), semaphore_(semaphore)
{ }

/*! \internal
 */
QMetaCallEvent::~QMetaCallEvent()
{
    for (int i = 0; i < nargs_; ++i) {
        if (types_[i] && args_[i])
            QMetaType::destroy(types_[i], args_[i]);
    }
    if (types_) qFree(types_);
    if (args_) qFree(args_);
#ifndef QT_NO_THREAD
    if (semaphore_)
        semaphore_->release();
#endif
}

/*! \internal
 */
int QMetaCallEvent::placeMetaCall(QObject *object)
{
    return object->qt_metacall(QMetaObject::InvokeMetaMethod, id_, args_);
}

/*!
    \class QObject
    \brief The QObject class is the base class of all Qt objects.

    \ingroup objectmodel
    \mainclass
    \reentrant

    QObject is the heart of the \l{Qt object model}. The central
    feature in this model is a very powerful mechanism for seamless
    object communication called \l{signals and slots}. You can
    connect a signal to a slot with connect() and destroy the
    connection with disconnect(). To avoid never ending notification
    loops you can temporarily block signals with blockSignals(). The
    protected functions connectNotify() and disconnectNotify() make
    it possible to track connections.

    QObjects organize themselves in object trees. When you create a
    QObject with another object as parent, the object will
    automatically add itself to the parent's children() list. The
    parent takes ownership of the object i.e. it will automatically
    delete its children in its destructor. You can look for an object
    by name and optionally type using findChild() or findChildren().

    Every object has an objectName() and its class name can be found
    via the corresponding metaObject() (see QMetaObject::className()).
    You can determine whether the object's class inherits another
    class in the QObject inheritance hierarchy by using the
    inherits() function.

    When an object is deleted, it emits a destroyed() signal. You can
    catch this signal to avoid dangling references to QObjects.

    QObjects can receive events through event() and filter the events
    of other objects. See installEventFilter() and eventFilter() for
    details. A convenience handler, childEvent(), can be reimplemented
    to catch child events.

    Events are delivered in the thread in which the object was
    created; see \l{Thread Support in Qt} and thread() for details.
    Note that event processing is not done at all for QObjects with no
    thread affinity (thread() returns zero). Use the moveToThread()
    function to change the thread affinity for an object and its
    children (the object cannot be moved if it has a parent).

    Last but not least, QObject provides the basic timer support in
    Qt; see QTimer for high-level support for timers.

    Notice that the Q_OBJECT macro is mandatory for any object that
    implements signals, slots or properties. You also need to run the
    \l{moc}{Meta Object Compiler} on the source file. We strongly
    recommend the use of this macro in all subclasses of QObject
    regardless of whether or not they actually use signals, slots and
    properties, since failure to do so may lead certain functions to
    exhibit strange behavior.

    All Qt widgets inherit QObject. The convenience function
    isWidgetType() returns whether an object is actually a widget. It
    is much faster than
    \l{qobject_cast()}{qobject_cast}<QWidget *>(\e{obj}) or
    \e{obj}->\l{inherits()}{inherits}("QWidget").

    Some QObject functions, e.g. children(), return a QObjectList.
    QObjectList is a typedef for QList<QObject *>.

    \target No copy constructor
    \section1 No copy constructor or assignment operator

    QObject has neither a copy constructor nor an assignment operator.
    This is by design. Actually, they are declared, but in a
    \c{private} section with the macro Q_DISABLE_COPY(). In fact, all
    Qt classes derived from QObject (direct or indirect) use this
    macro to declare their copy constructor and assignment operator to
    be private. The reasoning is found in the discussion on
    \l{Identity vs Value} {Identity vs Value} on the \l{Qt Object
    Model} page.

    The main consequence is that you should use pointers to QObject
    (or to your QObject subclass) where you might otherwise be tempted
    to use your QObject subclass as a value. For example, without a
    copy constructor, you can't use a subclass of QObject as the value
    to be stored in one of the container classes. You must store
    pointers.

    \section2 Auto-Connection

    Qt's meta-object system provides a mechanism to automatically connect
    signals and slots between QObject subclasses and their children. As long
    as objects are defined with suitable object names, and slots follow a
    simple naming convention, this connection can be performed at run-time
    by the QMetaObject::connectSlotsByName() function.

    \l uic generates code that invokes this function to enable
    auto-connection to be performed between widgets on forms created
    with \QD. More information about using auto-connection with \QD is
    given in the \l{Using a Designer UI File in Your Application} section of
    the \QD manual.

    \section2 Dynamic Properties

    From Qt 4.2, dynamic properties can be added to and removed from QObject
    instances at run-time. Dynamic properties do not need to be declared at
    compile-time, yet they provide the same advantages as static properties
    and are manipulated using the same API - using property() to read them
    and setProperty() to write them.

    From Qt 4.3, dynamic properties are supported by
    \l{Qt Designer's Widget Editing Mode#The Property Editor}{Qt Designer},
    and both standard Qt widgets and user-created forms can be given dynamic
    properties.

    \sa QMetaObject, QPointer, QObjectCleanupHandler, Q_DISABLE_COPY()
        {Object Trees and Object Ownership}
*/

/*!
    \relates QObject

    Returns a pointer to the object named \a name that inherits \a
    type and with a given \a parent.

    Returns 0 if there is no such child.

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 0
*/

void *qt_find_obj_child(QObject *parent, const char *type, const QString &name)
{
    QObjectList list = parent->children();
    if (list.size() == 0) return 0;
    for (int i = 0; i < list.size(); ++i) {
        QObject *obj = list.at(i);
        if (name == obj->objectName() && obj->inherits(type))
            return obj;
    }
    return 0;
}


/*****************************************************************************
  QObject member functions
 *****************************************************************************/

// check the constructor's parent thread argument
static bool check_parent_thread(QObject *parent,
                                QThreadData *parentThreadData,
                                QThreadData *currentThreadData)
{
    if (parent && parentThreadData != currentThreadData) {
        QThread *parentThread = parentThreadData->thread;
        QThread *currentThread = currentThreadData->thread;
        qWarning("QObject: Cannot create children for a parent that is in a different thread.\n"
                 "(Parent is %s(%p), parent's thread is %s(%p), current thread is %s(%p)",
                 parent->metaObject()->className(),
                 parent,
                 parentThread ? parentThread->metaObject()->className() : "QThread",
                 parentThread,
                 currentThread ? currentThread->metaObject()->className() : "QThread",
                 currentThread);
        return false;
    }
    return true;
}

/*!
    Constructs an object with parent object \a parent.

    The parent of an object may be viewed as the object's owner. For
    instance, a \l{QDialog}{dialog box} is the parent of the \gui OK
    and \gui Cancel buttons it contains.

    The destructor of a parent object destroys all child objects.

    Setting \a parent to 0 constructs an object with no parent. If the
    object is a widget, it will become a top-level window.

    \sa parent(), findChild(), findChildren()
*/

QObject::QObject(QObject *parent)
    : d_ptr(new QObjectPrivate)
{
    Q_D(QObject);
    qt_addObject(d_ptr->q_ptr = this);
    d->threadData = (parent && !parent->thread()) ? parent->d_func()->threadData : QThreadData::current();
    d->threadData->ref();
    if (!check_parent_thread(parent, parent ? parent->d_func()->threadData : 0, d->threadData))
        parent = 0;
    setParent(parent);
}

#ifdef QT3_SUPPORT
/*!
    \overload QObject()
    \obsolete

    Creates a new QObject with the given \a parent and object \a name.
 */
QObject::QObject(QObject *parent, const char *name)
    : d_ptr(new QObjectPrivate)
{
    Q_D(QObject);
    qt_addObject(d_ptr->q_ptr = this);
    d->threadData = (parent && !parent->thread()) ? parent->d_func()->threadData : QThreadData::current();
    d->threadData->ref();
    if (!check_parent_thread(parent, parent ? parent->d_func()->threadData : 0, d->threadData))
        parent = 0;
    setParent(parent);
    setObjectName(QString::fromAscii(name));
}
#endif

/*! \internal
 */
QObject::QObject(QObjectPrivate &dd, QObject *parent)
    : d_ptr(&dd)
{
    Q_D(QObject);
    qt_addObject(d_ptr->q_ptr = this);
    d->threadData = (parent && !parent->thread()) ? parent->d_func()->threadData : QThreadData::current();
    d->threadData->ref();
    if (!check_parent_thread(parent, parent ? parent->d_func()->threadData : 0, d->threadData))
        parent = 0;
    if (d->isWidget) {
        if (parent) {
            d->parent = parent;
            d->parent->d_func()->children.append(this);
        }
        // no events sent here, this is done at the end of the QWidget constructor
    } else {
        setParent(parent);
    }
}

/*!
    Destroys the object, deleting all its child objects.

    All signals to and from the object are automatically disconnected, and
    any pending posted events for the object are removed from the event
    queue. However, it is often safer to use deleteLater() rather than
    deleting a QObject subclass directly.

    \warning All child objects are deleted. If any of these objects
    are on the stack or global, sooner or later your program will
    crash. We do not recommend holding pointers to child objects from
    outside the parent. If you still do, the destroyed() signal gives
    you an opportunity to detect when an object is destroyed.

    \warning Deleting a QObject while pending events are waiting to
    be delivered can cause a crash. You must not delete the QObject
    directly if it exists in a different thread than the one currently
    executing. Use deleteLater() instead, which will cause the event
    loop to delete the object after all pending events have been
    delivered to it.

    \sa deleteLater()
*/

QObject::~QObject()
{
    Q_D(QObject);
    if (d->wasDeleted) {
#if defined(QT_DEBUG)
        qWarning("QObject: Double deletion detected");
#endif
        return;
    }
    d->wasDeleted = true;

    d->blockSig = 0; // unblock signals so we always emit destroyed()

    if (!d->isWidget) {
        // set all QPointers for this object to zero - note that
        // ~QWidget() does this for us, so we don't have to do it twice
        QObjectPrivate::clearGuards(this);
    }

    emit destroyed(this);

    {
        QMutexLocker locker(signalSlotLock(this));

        // set ref to zero to indicate that this object has been deleted
        if (d->currentSender != 0)
            d->currentSender->ref = 0;
        d->currentSender = 0;

        // disconnect all receivers
        if (d->connectionLists) {
            ++d->connectionLists->inUse;
            for (int signal = -1; signal < d->connectionLists->count(); ++signal) {
                QObjectPrivate::ConnectionList &connectionList = (*d->connectionLists)[signal];
                for (int i = 0; i < connectionList.count(); ++i) {
                    QObjectPrivate::Connection *c = connectionList[i];
                    if (!c->receiver) {
                        delete c;
                        continue;
                    }

                    QMutex *m = signalSlotLock(c->receiver);
                    bool needToUnlock = QOrderedMutexLocker::relock(locker.mutex(), m);
                    c = connectionList[i];
                    if (c->receiver) {
                        *c->prev = c->next;
                        if (c->next) c->next->prev = c->prev;
                    }
                    if (needToUnlock)
                        m->unlock();

                    delete c;
                }
            }

            if (!--d->connectionLists->inUse) {
                delete d->connectionLists;
            } else {
                d->connectionLists->orphaned = true;
            }
            d->connectionLists = 0;
        }

        // disconnect all senders
        QObjectPrivate::Connection *node = d->senders;
        while (node) {
            QMutex *m = signalSlotLock(node->sender);
            node->prev = &node;
            bool needToUnlock = QOrderedMutexLocker::relock(locker.mutex(), m);
            //the node has maybe been removed while the mutex was unlocked in relock?
            if (!node || signalSlotLock(node->sender) != m) {
                m->unlock();
                continue;
            }
            node->receiver = 0;
            QObjectConnectionListVector *senderLists = node->sender->d_func()->connectionLists;
            if (senderLists)
                senderLists->dirty = true;

            if (needToUnlock)
                m->unlock();
            node = node->next;
        }
    }

    if (d->pendTimer) {
        // unregister pending timers
        if (d->threadData->eventDispatcher)
            d->threadData->eventDispatcher->unregisterTimers(this);
    }

#ifdef QT3_SUPPORT
    d->pendingChildInsertedEvents.clear();
#endif

    d->eventFilters.clear();

    if (!d->children.isEmpty())
        d->deleteChildren();

    qt_removeObject(this);

    QMutexLocker locker2(&d->threadData->postEventList.mutex);
    if (d->postedEvents > 0)
        QCoreApplicationPrivate::removePostedEvents_unlocked(this, 0, d->threadData);
    locker2.unlock();

    if (d->parent)        // remove it from parent object
        d->setParent_helper(0);

    d->threadData->deref();

#ifdef QT_JAMBI_BUILD
    if (d->inEventHandler) {
        qWarning("QObject: Do not delete object, '%s', during its event handler!",
                 objectName().isNull() ? "unnamed" : qPrintable(objectName()));
    }
#endif

    delete d;
    d_ptr = 0;
}

QObjectPrivate::Connection::~Connection()
{
    if (argumentTypes != &DIRECT_CONNECTION_ONLY)
        delete [] argumentTypes;
}


/*!
    \fn QMetaObject *QObject::metaObject() const

    Returns a pointer to the meta-object of this object.

    A meta-object contains information about a class that inherits
    QObject, e.g. class name, superclass name, properties, signals and
    slots. Every QObject subclass that contains the Q_OBJECT macro will have a
    meta-object.

    The meta-object information is required by the signal/slot
    connection mechanism and the property system. The inherits()
    function also makes use of the meta-object.

    If you have no pointer to an actual object instance but still
    want to access the meta-object of a class, you can use \l
    staticMetaObject.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 1

    \sa staticMetaObject
*/

/*!
    \variable QObject::staticMetaObject

    This variable stores the meta-object for the class.

    A meta-object contains information about a class that inherits
    QObject, e.g. class name, superclass name, properties, signals and
    slots. Every class that contains the Q_OBJECT macro will also have
    a meta-object.

    The meta-object information is required by the signal/slot
    connection mechanism and the property system. The inherits()
    function also makes use of the meta-object.

    If you have a pointer to an object, you can use metaObject() to
    retrieve the meta-object associated with that object.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 2

    \sa metaObject()
*/

/*! \fn T *qobject_cast<T *>(QObject *object)
    \relates QObject

    Returns the given \a object cast to type T if the object is of type
    T (or of a subclass); otherwise returns 0.  If \a object is 0 then 
    it will also return 0.

    The class T must inherit (directly or indirectly) QObject and be
    declared with the \l Q_OBJECT macro.

    A class is considered to inherit itself.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 3

    The qobject_cast() function behaves similarly to the standard C++
    \c dynamic_cast(), with the advantages that it doesn't require
    RTTI support and it works across dynamic library boundaries.

    qobject_cast() can also be used in conjunction with interfaces;
    see the \l{tools/plugandpaint}{Plug & Paint} example for details.

    \warning If T isn't declared with the Q_OBJECT macro, this
    function's return value is undefined.

    \sa QObject::inherits()
*/

/*!
    \fn bool QObject::inherits(const char *className) const

    Returns true if this object is an instance of a class that
    inherits \a className or a QObject subclass that inherits \a
    className; otherwise returns false.

    A class is considered to inherit itself.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 4

    (\l QLayoutItem is not a QObject.)

    Consider using qobject_cast<Type *>(object) instead. The method
    is both faster and safer.

    \sa metaObject(), qobject_cast()
*/

/*!
    \property QObject::objectName

    \brief the name of this object

    You can find an object by name (and type) using findChild(). You can
    find a set of objects with findChildren().

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 5

    By default, this property contains an empty string.

    \sa metaObject(), QMetaObject::className()
*/

QString QObject::objectName() const
{
    Q_D(const QObject);
    return d->objectName;
}

/*
    Sets the object's name to \a name.
*/
void QObject::setObjectName(const QString &name)
{
    Q_D(QObject);
    d->objectName = name;
}


#ifdef QT3_SUPPORT
/*! \internal
    QObject::child is compat but needs to call itself recursively,
    that's why we need this helper.
*/
static QObject *qChildHelper(const char *objName, const char *inheritsClass,
                             bool recursiveSearch, const QObjectList &children)
{
    if (children.isEmpty())
        return 0;

    bool onlyWidgets = (inheritsClass && qstrcmp(inheritsClass, "QWidget") == 0);
    const QLatin1String oName(objName);
    for (int i = 0; i < children.size(); ++i) {
        QObject *obj = children.at(i);
        if (onlyWidgets) {
            if (obj->isWidgetType() && (!objName || obj->objectName() == oName))
                return obj;
        } else if ((!inheritsClass || obj->inherits(inheritsClass))
                   && (!objName || obj->objectName() == oName))
            return obj;
        if (recursiveSearch && (obj = qChildHelper(objName, inheritsClass,
                                                   recursiveSearch, obj->children())))
            return obj;
    }
    return 0;
}


/*!
    Searches the children and optionally grandchildren of this object,
    and returns a child that is called \a objName that inherits \a
    inheritsClass. If \a inheritsClass is 0 (the default), any class
    matches.

    If \a recursiveSearch is true (the default), child() performs a
    depth-first search of the object's children.

    If there is no such object, this function returns 0. If there are
    more than one, the first one found is returned.
*/
QObject* QObject::child(const char *objName, const char *inheritsClass,
                         bool recursiveSearch) const
{
    Q_D(const QObject);
    return qChildHelper(objName, inheritsClass, recursiveSearch, d->children);
}
#endif

/*!
    \fn bool QObject::isWidgetType() const

    Returns true if the object is a widget; otherwise returns false.

    Calling this function is equivalent to calling
    inherits("QWidget"), except that it is much faster.
*/


/*!
    This virtual function receives events to an object and should
    return true if the event \a e was recognized and processed.

    The event() function can be reimplemented to customize the
    behavior of an object.

    \sa installEventFilter(), timerEvent(), QApplication::sendEvent(),
    QApplication::postEvent(), QWidget::event()
*/

bool QObject::event(QEvent *e)
{
    switch (e->type()) {
    case QEvent::Timer:
        timerEvent((QTimerEvent*)e);
        break;

#ifdef QT3_SUPPORT
    case QEvent::ChildInsertedRequest:
        d_func()->sendPendingChildInsertedEvents();
        break;
#endif

    case QEvent::ChildAdded:
    case QEvent::ChildPolished:
#ifdef QT3_SUPPORT
    case QEvent::ChildInserted:
#endif
    case QEvent::ChildRemoved:
        childEvent((QChildEvent*)e);
        break;

    case QEvent::DeferredDelete:
        qDeleteInEventHandler(this);
        break;

    case QEvent::MetaCall:
        {
            d_func()->inEventHandler = false;
            QMetaCallEvent *mce = static_cast<QMetaCallEvent*>(e);
            QObjectPrivate::Sender currentSender;
            currentSender.sender = const_cast<QObject*>(mce->sender());
            currentSender.signal = mce->signalId();
            currentSender.ref = 1;
            QObjectPrivate::Sender * const previousSender =
                QObjectPrivate::setCurrentSender(this, &currentSender);
#if defined(QT_NO_EXCEPTIONS)
            mce->placeMetaCall(this);
#else
            try {
                mce->placeMetaCall(this);
            } catch (...) {
                QObjectPrivate::resetCurrentSender(this, &currentSender, previousSender);
                throw;
            }
#endif
            QObjectPrivate::resetCurrentSender(this, &currentSender, previousSender);
            break;
        }

    case QEvent::ThreadChange: {
        Q_D(QObject);
        QThreadData *threadData = d->threadData;
        QAbstractEventDispatcher *eventDispatcher = threadData->eventDispatcher;
        if (eventDispatcher) {
            QList<QPair<int, int> > timers = eventDispatcher->registeredTimers(this);
            if (!timers.isEmpty()) {
                // set inThreadChangeEvent to true to tell the dispatcher not to release out timer ids
                // back to the pool (since the timer ids are moving to a new thread).
                d->inThreadChangeEvent = true;
                eventDispatcher->unregisterTimers(this);
                d->inThreadChangeEvent = false;
                QMetaObject::invokeMethod(this, "_q_reregisterTimers", Qt::QueuedConnection,
                                          Q_ARG(void*, (new QList<QPair<int, int> >(timers))));
            }
        }
        break;
    }

    default:
        if (e->type() >= QEvent::User) {
            customEvent(e);
            break;
        }
        return false;
    }
    return true;
}

/*!
    \fn void QObject::timerEvent(QTimerEvent *event)

    This event handler can be reimplemented in a subclass to receive
    timer events for the object.

    QTimer provides a higher-level interface to the timer
    functionality, and also more general information about timers. The
    timer event is passed in the \a event parameter.

    \sa startTimer(), killTimer(), event()
*/

void QObject::timerEvent(QTimerEvent *)
{
}


/*!
    This event handler can be reimplemented in a subclass to receive
    child events. The event is passed in the \a event parameter.

    QEvent::ChildAdded and QEvent::ChildRemoved events are sent to
    objects when children are added or removed. In both cases you can
    only rely on the child being a QObject, or if isWidgetType()
    returns true, a QWidget. (This is because, in the
    \l{QEvent::ChildAdded}{ChildAdded} case, the child is not yet
    fully constructed, and in the \l{QEvent::ChildRemoved}{ChildRemoved}
    case it might have been destructed already).

    QEvent::ChildPolished events are sent to widgets when children
    are polished, or when polished children are added. If you receive
    a child polished event, the child's construction is usually
    completed. However, this is not guaranteed, and multiple polish
    events may be delivered during the execution of a widget's
    constructor.

    For every child widget, you receive one
    \l{QEvent::ChildAdded}{ChildAdded} event, zero or more
    \l{QEvent::ChildPolished}{ChildPolished} events, and one
    \l{QEvent::ChildRemoved}{ChildRemoved} event.

    The \l{QEvent::ChildPolished}{ChildPolished} event is omitted if
    a child is removed immediately after it is added. If a child is
    polished several times during construction and destruction, you
    may receive several child polished events for the same child,
    each time with a different virtual table.

    \sa event()
*/

void QObject::childEvent(QChildEvent * /* event */)
{
}


/*!
    This event handler can be reimplemented in a subclass to receive
    custom events. Custom events are user-defined events with a type
    value at least as large as the QEvent::User item of the
    QEvent::Type enum, and is typically a QEvent subclass. The event
    is passed in the \a event parameter.

    \sa event(), QEvent
*/
void QObject::customEvent(QEvent * /* event */)
{
}



/*!
    Filters events if this object has been installed as an event
    filter for the \a watched object.

    In your reimplementation of this function, if you want to filter
    the \a event out, i.e. stop it being handled further, return
    true; otherwise return false.

    Example:
    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 6

    Notice in the example above that unhandled events are passed to
    the base class's eventFilter() function, since the base class
    might have reimplemented eventFilter() for its own internal
    purposes.

    \warning If you delete the receiver object in this function, be
    sure to return true. Otherwise, Qt will forward the event to the
    deleted object and the program might crash.

    \sa installEventFilter()
*/

bool QObject::eventFilter(QObject * /* watched */, QEvent * /* event */)
{
    return false;
}

/*!
    \fn bool QObject::signalsBlocked() const

    Returns true if signals are blocked; otherwise returns false.

    Signals are not blocked by default.

    \sa blockSignals()
*/

/*!
    If \a block is true, signals emitted by this object are blocked
    (i.e., emitting a signal will not invoke anything connected to it).
	If \a block is false, no such blocking will occur.

    The return value is the previous value of signalsBlocked().

    Note that the destroyed() signal will be emitted even if the signals
    for this object have been blocked.

    \sa signalsBlocked()
*/

bool QObject::blockSignals(bool block)
{
    Q_D(QObject);
    bool previous = d->blockSig;
    d->blockSig = block;
    return previous;
}

/*!
    Returns the thread in which the object lives.

    \sa moveToThread()
*/
QThread *QObject::thread() const
{
    return d_func()->threadData->thread;
}

/*!
    Changes the thread affinity for this object and its children. The
    object cannot be moved if it has a parent. Event processing will
    continue in the \a targetThread.

    To move an object to the main thread, use QApplication::instance()
    to retrieve a pointer to the current application, and then use
    QApplication::thread() to retrieve the thread in which the
    application lives. For example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 7

    If \a targetThread is zero, all event processing for this object
    and its children stops.

    Note that all active timers for the object will be reset. The
    timers are first stopped in the current thread and restarted (with
    the same interval) in the \a targetThread. As a result, constantly
    moving an object between threads can postpone timer events
    indefinitely.

    A QEvent::ThreadChange event is sent to this object just before
    the thread affinity is changed. You can handle this event to
    perform any special processing. Note that any new events that are
    posted to this object will be handled in the \a targetThread.

    \warning This function is \e not thread-safe; the current thread
    must be same as the current thread affinity. In other words, this
    function can only "push" an object from the current thread to
    another thread, it cannot "pull" an object from any arbitrary
    thread to the current thread.

    \sa thread()
 */
void QObject::moveToThread(QThread *targetThread)
{
    Q_D(QObject);

    if (d->threadData->thread == targetThread) {
        // object is already in this thread
        return;
    }

    if (d->parent != 0) {
        qWarning("QObject::moveToThread: Cannot move objects with a parent");
        return;
    }
    if (d->isWidget) {
        qWarning("QObject::moveToThread: Widgets cannot be moved to a new thread");
        return;
    }

    QThreadData *currentData = QThreadData::current();
    QThreadData *targetData = targetThread ? QThreadData::get2(targetThread) : new QThreadData(0);
    if (d->threadData->thread == 0 && currentData == targetData) {
        // one exception to the rule: we allow moving objects with no thread affinity to the current thread
        currentData = d->threadData;
    } else if (d->threadData != currentData) {
        qWarning("QObject::moveToThread: Current thread (%p) is not the object's thread (%p).\n"
                 "Cannot move to target thread (%p)\n",
                 d->threadData->thread, currentData->thread, targetData->thread);

#ifdef Q_WS_MAC
        qWarning("On Mac OS X, you might be loading two sets of Qt binaries into the same process. "
                 "Check that all plugins are compiled against the right Qt binaries. Export "
                 "DYLD_PRINT_LIBRARIES=1 and check that only one set of binaries are being loaded.");
#endif

        return;
    }

    // prepare to move
    d->moveToThread_helper();

    QOrderedMutexLocker locker(&currentData->postEventList.mutex,
                               &targetData->postEventList.mutex);

    // keep currentData alive (since we've got it locked)
    currentData->ref();

    // move the object
    d_func()->setThreadData_helper(currentData, targetData);

    locker.unlock();

    // now currentData can commit suicide if it wants to
    currentData->deref();
}

void QObjectPrivate::moveToThread_helper()
{
    Q_Q(QObject);
    QEvent e(QEvent::ThreadChange);
    QCoreApplication::sendEvent(q, &e);
    for (int i = 0; i < children.size(); ++i) {
        QObject *child = children.at(i);
        child->d_func()->moveToThread_helper();
    }
}

void QObjectPrivate::setThreadData_helper(QThreadData *currentData, QThreadData *targetData)
{
    Q_Q(QObject);

    // move posted events
    int eventsMoved = 0;
    for (int i = 0; i < currentData->postEventList.size(); ++i) {
        const QPostEvent &pe = currentData->postEventList.at(i);
        if (!pe.event)
            continue;
        if (pe.receiver == q) {
            // move this post event to the targetList
            targetData->postEventList.append(pe);
            const_cast<QPostEvent &>(pe).event = 0;
            ++eventsMoved;
        }
    }
    if (eventsMoved > 0 && targetData->eventDispatcher)
        targetData->eventDispatcher->wakeUp();

    // the current emitting thread shouldn't restore currentSender after calling moveToThread()
    if (currentSender)
        currentSender->ref = 0;
    currentSender = 0;

    // the current event thread also shouldn't restore the delete watch
    inEventHandler = false;
    if (deleteWatch)
        *deleteWatch = 1;
    deleteWatch = 0;

    // set new thread data
    targetData->ref();
    threadData->deref();
    threadData = targetData;

    for (int i = 0; i < children.size(); ++i) {
        QObject *child = children.at(i);
        child->d_func()->setThreadData_helper(currentData, targetData);
    }
}

void QObjectPrivate::_q_reregisterTimers(void *pointer)
{
    Q_Q(QObject);
    QList<QPair<int, int> > *timerList = reinterpret_cast<QList<QPair<int, int> > *>(pointer);
    QAbstractEventDispatcher *eventDispatcher = threadData->eventDispatcher;
    for (int i = 0; i < timerList->size(); ++i) {
        const QPair<int, int> &pair = timerList->at(i);
        eventDispatcher->registerTimer(pair.first, pair.second, q);
    }
    delete timerList;
}


//
// The timer flag hasTimer is set when startTimer is called.
// It is not reset when killing the timer because more than
// one timer might be active.
//

/*!
    Starts a timer and returns a timer identifier, or returns zero if
    it could not start a timer.

    A timer event will occur every \a interval milliseconds until
    killTimer() is called. If \a interval is 0, then the timer event
    occurs once every time there are no more window system events to
    process.

    The virtual timerEvent() function is called with the QTimerEvent
    event parameter class when a timer event occurs. Reimplement this
    function to get timer events.

    If multiple timers are running, the QTimerEvent::timerId() can be
    used to find out which timer was activated.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 8

    Note that QTimer's accuracy depends on the underlying operating
    system and hardware. Most platforms support an accuracy of 20
    milliseconds; some provide more. If Qt is unable to deliver the
    requested number of timer events, it will silently discard some.

    The QTimer class provides a high-level programming interface with
    single-shot timers and timer signals instead of events. There is
    also a QBasicTimer class that is more lightweight than QTimer and
    less clumsy than using timer IDs directly.

    \sa timerEvent(), killTimer(), QTimer::singleShot()
*/

int QObject::startTimer(int interval)
{
    Q_D(QObject);

    if (interval < 0) {
        qWarning("QObject::startTimer: QTimer cannot have a negative interval");
        return 0;
    }

    d->pendTimer = true;                                // set timer flag

    if (!d->threadData->eventDispatcher) {
        qWarning("QObject::startTimer: QTimer can only be used with threads started with QThread");
        return 0;
    }
    return d->threadData->eventDispatcher->registerTimer(interval, this);
}

/*!
    Kills the timer with timer identifier, \a id.

    The timer identifier is returned by startTimer() when a timer
    event is started.

    \sa timerEvent(), startTimer()
*/

void QObject::killTimer(int id)
{
    Q_D(QObject);
    if (d->threadData->eventDispatcher)
        d->threadData->eventDispatcher->unregisterTimer(id);
}


/*!
    \fn QObject *QObject::parent() const

    Returns a pointer to the parent object.

    \sa children()
*/

/*!
    \fn const QObjectList &QObject::children() const

    Returns a list of child objects.
    The QObjectList class is defined in the \c{<QObject>} header
    file as the following:

    \quotefromfile src/corelib/kernel/qobject.h
    \skipto /typedef .*QObjectList/
    \printuntil QObjectList

    The first child added is the \l{QList::first()}{first} object in
    the list and the last child added is the \l{QList::last()}{last}
    object in the list, i.e. new children are appended at the end.

    Note that the list order changes when QWidget children are
    \l{QWidget::raise()}{raised} or \l{QWidget::lower()}{lowered}. A
    widget that is raised becomes the last object in the list, and a
    widget that is lowered becomes the first object in the list.

    \sa findChild(), findChildren(), parent(), setParent()
*/

#ifdef QT3_SUPPORT
static void objSearch(QObjectList &result,
                       const QObjectList &list,
                       const char  *inheritsClass,
                       bool onlyWidgets,
                       const char  *objName,
                       QRegExp           *rx,
                       bool            recurse)
{
    for (int i = 0; i < list.size(); ++i) {
        QObject *obj = list.at(i);
        if (!obj)
            continue;
        bool ok = true;
        if (onlyWidgets)
            ok = obj->isWidgetType();
        else if (inheritsClass && !obj->inherits(inheritsClass))
            ok = false;
        if (ok) {
            if (objName)
                ok = (obj->objectName() == QLatin1String(objName));
#ifndef QT_NO_REGEXP
            else if (rx)
                ok = (rx->indexIn(obj->objectName()) != -1);
#endif
        }
        if (ok)                                // match!
            result.append(obj);
        if (recurse) {
            QObjectList clist = obj->children();
            if (!clist.isEmpty())
                objSearch(result, clist, inheritsClass,
                           onlyWidgets, objName, rx, recurse);
        }
    }
}

/*!
    \internal

    Searches the children and optionally grandchildren of this object,
    and returns a list of those objects that are named or that match
    \a objName and inherit \a inheritsClass. If \a inheritsClass is 0
    (the default), all classes match. If \a objName is 0 (the
    default), all object names match.

    If \a regexpMatch is true (the default), \a objName is a regular
    expression that the objects's names must match. The syntax is that
    of a QRegExp. If \a regexpMatch is false, \a objName is a string
    and object names must match it exactly.

    Note that \a inheritsClass uses single inheritance from QObject,
    the way inherits() does. According to inherits(), QWidget
    inherits QObject but not QPaintDevice. This does not quite match
    reality, but is the best that can be done on the wide variety of
    compilers Qt supports.

    Finally, if \a recursiveSearch is true (the default), queryList()
    searches \e{n}th-generation as well as first-generation children.

    If all this seems a bit complex for your needs, the simpler
    child() function may be what you want.

    This somewhat contrived example disables all the buttons in this
    window:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 9

    \warning Delete the list as soon you have finished using it. The
    list contains pointers that may become invalid at almost any time
    without notice (as soon as the user closes a window you may have
    dangling pointers, for example).

    \sa child() children(), parent(), inherits(), objectName(), QRegExp
*/

QObjectList QObject::queryList(const char *inheritsClass,
                                const char *objName,
                                bool regexpMatch,
                                bool recursiveSearch) const
{
    Q_D(const QObject);
    QObjectList list;
    bool onlyWidgets = (inheritsClass && qstrcmp(inheritsClass, "QWidget") == 0);
#ifndef QT_NO_REGEXP
    if (regexpMatch && objName) {                // regexp matching
        QRegExp rx(QString::fromLatin1(objName));
        objSearch(list, d->children, inheritsClass, onlyWidgets, 0, &rx, recursiveSearch);
    } else
#endif
    {
        objSearch(list, d->children, inheritsClass, onlyWidgets, objName, 0, recursiveSearch);
    }
    return list;
}
#endif

/*!
    \fn T *QObject::findChild(const QString &name) const

    Returns the child of this object that can be cast into type T and
    that is called \a name, or 0 if there is no such object.
    Omitting the \a name argument causes all object names to be matched.
    The search is performed recursively.

    If there is more than one child matching the search, the most
    direct ancestor is returned. If there are several direct
    ancestors, it is undefined which one will be returned. In that
    case, findChildren() should be used.

    This example returns a child \l{QPushButton} of \c{parentWidget}
    named \c{"button1"}:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 10

    This example returns a \l{QListWidget} child of \c{parentWidget}:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 11

    \warning This function is not available with MSVC 6. Use
    qFindChild() instead if you need to support that version of the
    compiler.

    \sa findChildren(), qFindChild()
*/

/*!
    \fn QList<T> QObject::findChildren(const QString &name) const

    Returns all children of this object with the given \a name that can be
    cast to type T, or an empty list if there are no such objects.
    Omitting the \a name argument causes all object names to be matched.
    The search is performed recursively.

    The following example shows how to find a list of child \l{QWidget}s of
    the specified \c{parentWidget} named \c{widgetname}:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 12

    This example returns all \c{QPushButton}s that are children of \c{parentWidget}:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 13

    \warning This function is not available with MSVC 6. Use
    qFindChildren() instead if you need to support that version of the
    compiler.

    \sa findChild(), qFindChildren()
*/

/*!
    \fn QList<T> QObject::findChildren(const QRegExp &regExp) const
    \overload findChildren()

    Returns the children of this object that can be cast to type T
    and that have names matching the regular expression \a regExp,
    or an empty list if there are no such objects.
    The search is performed recursively.

    \warning This function is not available with MSVC 6. Use
    qFindChildren() instead if you need to support that version of the
    compiler.
*/

/*!
    \fn T qFindChild(const QObject *obj, const QString &name)
    \relates QObject

    This function is equivalent to
    \a{obj}->\l{QObject::findChild()}{findChild}<T>(\a name). It is
    provided as a work-around for MSVC 6, which doesn't support
    member template functions.

    \sa QObject::findChild()
*/

/*!
    \fn QList<T> qFindChildren(const QObject *obj, const QString &name)
    \relates QObject

    This function is equivalent to
    \a{obj}->\l{QObject::findChildren()}{findChildren}<T>(\a name). It is
    provided as a work-around for MSVC 6, which doesn't support
    member template functions.

    \sa QObject::findChildren()
*/

/*!
    \fn QList<T> qFindChildren(const QObject *obj, const QRegExp &regExp)
    \relates QObject
    \overload qFindChildren()

    This function is equivalent to
    \a{obj}->\l{QObject::findChildren()}{findChildren}<T>(\a regExp). It is
    provided as a work-around for MSVC 6, which doesn't support
    member template functions.
*/

/*!
    \internal
    \fn T qFindChild(const QObject *obj, const QString &name = QString(), T dummy = 0)
    \relates QObject
    \overload qFindChildren()

    This function is equivalent to
    \a{obj}->\l{QObject::findChild()}{findChild}<T>(\a name). It is
    provided as a work-around for MSVC 6, which doesn't support
    member template functions.

    \sa QObject::findChild()
*/

/*!
    \internal
    \fn QList<T> qFindChildren(const QObject *obj, const QString &name = QString(), T dummy = 0)
    \relates QObject
    \overload qFindChildren()

    This function is equivalent to
    \a{obj}->\l{QObject::findChildren()}{findChildren}<T>(\a name). It is
    provided as a work-around for MSVC 6, which doesn't support
    member template functions.

    \sa QObject::findChildren()
*/

/*!
    \internal
*/
void qt_qFindChildren_helper(const QObject *parent, const QString &name, const QRegExp *re,
                         const QMetaObject &mo, QList<void*> *list)
{
    if (!parent || !list)
        return;
    const QObjectList &children = parent->children();
    QObject *obj;
    for (int i = 0; i < children.size(); ++i) {
        obj = children.at(i);
        if (mo.cast(obj)) {
            if (re) {
                if (re->indexIn(obj->objectName()) != -1)
                    list->append(obj);
            } else {
                if (name.isNull() || obj->objectName() == name)
                    list->append(obj);
            }
        }
        qt_qFindChildren_helper(obj, name, re, mo, list);
    }
}

/*! \internal
 */
QObject *qt_qFindChild_helper(const QObject *parent, const QString &name, const QMetaObject &mo)
{
    if (!parent)
        return 0;
    const QObjectList &children = parent->children();
    QObject *obj;
    int i;
    for (i = 0; i < children.size(); ++i) {
        obj = children.at(i);
        if (mo.cast(obj) && (name.isNull() || obj->objectName() == name))
            return obj;
    }
    for (i = 0; i < children.size(); ++i) {
        obj = qt_qFindChild_helper(children.at(i), name, mo);
        if (obj)
            return obj;
    }
    return 0;
}

/*!
    Makes the object a child of \a parent.

    \sa QWidget::setParent()
*/

void QObject::setParent(QObject *parent)
{
    Q_D(QObject);
    Q_ASSERT(!d->isWidget);
    d->setParent_helper(parent);
}

void QObjectPrivate::deleteChildren()
{
    const bool reallyWasDeleted = wasDeleted;
    wasDeleted = true;
    // delete children objects
    // don't use qDeleteAll as the destructor of the child might
    // delete siblings
    for (int i = 0; i < children.count(); ++i) {
        currentChildBeingDeleted = children.at(i);
        children[i] = 0;
        delete currentChildBeingDeleted;
    }
    children.clear();
    currentChildBeingDeleted = 0;
    wasDeleted = reallyWasDeleted;
}

void QObjectPrivate::setParent_helper(QObject *o)
{
    Q_Q(QObject);
    if (o == parent)
        return;
    if (parent) {
        QObjectPrivate *parentD = parent->d_func();
        if (parentD->wasDeleted && wasDeleted
            && parentD->currentChildBeingDeleted == q) {
            // don't do anything since QObjectPrivate::deleteChildren() already
            // cleared our entry in parentD->children.
        } else {
            const int index = parentD->children.indexOf(q);
            if (parentD->wasDeleted) {
                parentD->children[index] = 0;
            } else {
                parentD->children.removeAt(index);
                if (sendChildEvents && parentD->receiveChildEvents) {
                    QChildEvent e(QEvent::ChildRemoved, q);
                    QCoreApplication::sendEvent(parent, &e);
                }
            }
        }
    }
    parent = o;
    if (parent) {
        // object hierarchies are constrained to a single thread
        if (threadData != parent->d_func()->threadData) {
            qWarning("QObject::setParent: Cannot set parent, new parent is in a different thread");
            parent = 0;
            return;
        }
        parent->d_func()->children.append(q);
        if(sendChildEvents && parent->d_func()->receiveChildEvents) {
            if (!isWidget) {
                QChildEvent e(QEvent::ChildAdded, q);
                QCoreApplication::sendEvent(parent, &e);
#ifdef QT3_SUPPORT
                if (parent->d_func()->pendingChildInsertedEvents.isEmpty()) {
                    QCoreApplication::postEvent(parent,
                                                new QEvent(QEvent::ChildInsertedRequest),
                                                Qt::HighEventPriority);
                }
                parent->d_func()->pendingChildInsertedEvents.append(q);
#endif
            }
        }
    }
}

/*!
    \fn void QObject::installEventFilter(QObject *filterObj)

    Installs an event filter \a filterObj on this object. For example:
    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 14

    An event filter is an object that receives all events that are
    sent to this object. The filter can either stop the event or
    forward it to this object. The event filter \a filterObj receives
    events via its eventFilter() function. The eventFilter() function
    must return true if the event should be filtered, (i.e. stopped);
    otherwise it must return false.

    If multiple event filters are installed on a single object, the
    filter that was installed last is activated first.

    Here's a \c KeyPressEater class that eats the key presses of its
    monitored objects:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 15

    And here's how to install it on two widgets:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 16

    The QShortcut class, for example, uses this technique to intercept
    shortcut key presses.

    \warning If you delete the receiver object in your eventFilter()
    function, be sure to return true. If you return false, Qt sends
    the event to the deleted object and the program will crash.

    Note that the filtering object must be in the same thread as this
    object. If \a filterObj is in a different thread, this function does
    nothing. If either \a filterObj or this object are moved to a different
    thread after calling this function, the event filter will not be
    called until both objects have the same thread affinity again (it
    is \e not removed).

    \sa removeEventFilter(), eventFilter(), event()
*/

void QObject::installEventFilter(QObject *obj)
{
    Q_D(QObject);
    if (!obj)
        return;
    if (d->threadData != obj->d_func()->threadData) {
        qWarning("QObject::installEventFilter(): Cannot filter events for objects in a different thread.");
        return;
    }

    // clean up unused items in the list
    d->eventFilters.removeAll((QObject*)0);
    d->eventFilters.removeAll(obj);
    d->eventFilters.prepend(obj);
}

/*!
    Removes an event filter object \a obj from this object. The
    request is ignored if such an event filter has not been installed.

    All event filters for this object are automatically removed when
    this object is destroyed.

    It is always safe to remove an event filter, even during event
    filter activation (i.e. from the eventFilter() function).

    \sa installEventFilter(), eventFilter(), event()
*/

void QObject::removeEventFilter(QObject *obj)
{
    Q_D(QObject);
    for (int i = 0; i < d->eventFilters.count(); ++i) {
        if (d->eventFilters.at(i) == obj)
            d->eventFilters[i] = 0;
    }
}


/*!
    \fn QObject::destroyed(QObject *obj)

    This signal is emitted immediately before the object \a obj is
    destroyed, and can not be blocked.

    All the objects's children are destroyed immediately after this
    signal is emitted.

    \sa deleteLater(), QPointer
*/

/*!
    Schedules this object for deletion.

    The object will be deleted when control returns to the event
    loop. If the event loop is not running when this function is
    called (e.g. deleteLater() is called on an object before
    QCoreApplication::exec()), the object will be deleted once the
    event loop is started.

    Note that entering and leaving a new event loop (e.g., by opening a modal
    dialog) will \e not perform the deferred deletion; for the object to be
    deleted, the control must return to the event loop from which
    deleteLater() was called.

    \bold{Note:} It is safe to call this function more than once; when the
    first deferred deletion event is delivered, any pending events for the
    object are removed from the event queue.

    \sa destroyed(), QPointer
*/
void QObject::deleteLater()
{
    QCoreApplication::postEvent(this, new QEvent(QEvent::DeferredDelete));
}

/*!
    \fn QString QObject::tr(const char *sourceText, const char *disambiguation, int n)
    \reentrant

    Returns a translated version of \a sourceText, optionally based on a
    \a disambiguation string and value of \a n for strings containing plurals;
    otherwise returns \a sourceText itself if no appropriate translated string
    is available.

    See the sections below on Disambiguation and Handling Plurals for more
    information about the optional \a disambiguation and \a n parameters.

    QObject and its subclasses obtain translated strings from any translator
    objects that have been installed on the application object; see the
    QTranslator documentation for details about this mechanism.

    A translatable string is referenced by its translation context;
    this is the name of the QObject subclass whose tr() function is invoked,
    as in the following example:

    \snippet mainwindows/sdi/mainwindow.cpp implicit tr context
    \dots

    Here, the context is \c MainWindow because it is the \c MainWindow::tr()
    function that is invoked. Translation contexts can be given explicitly
    by fully qualifying the call to tr(); for example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp explicit tr context

    This call obtains the translated text for "Page up" from the \c QScrollBar
    context.

    \section1 Defining Translation Contexts

    The translation context for QObject and each QObject subclass is the
    class name itself. Developers subclassing QObject must use the
    Q_OBJECT macro in their class definition to override the translation
    context. This macro sets the context to the name of the subclass.

    If Q_OBJECT is not used in a class definition, the context will be
    inherited from the base class. For example, since all QObject-based
    classes in Qt provide a context, a new QWidget subclass defined without
    a Q_OBJECT macro will use the "QWidget" context if its tr() function
    is invoked.

    \section1 Translator Comments

    Developers can include information about each translatable string to
    help translators with the translation process. These are extracted
    when \l lupdate is used to process the source files. The recommended
    way to add comments is to annotate the tr() calls in your code with
    comments of the form:

    \tt{//: ...}

    or

    \tt{\begincomment: ... \endcomment}

    Examples:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 40

    In these examples, the comments will be associated with the strings
    passed to tr() in the context of each call.

    \section1 Disambiguation

    If the same \a sourceText is used in different roles within the
    same context, an additional identifying string may be passed in
    \a disambiguation (0 by default). In Qt 4.4 and earlier, this was
    the preferred way to pass comments to translators.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 17

    \section1 Meta Data

    Additional data can be attached to each translatable message.
    The syntax:

    \tt{//= <id>}

    can be used to give the message a unique identifier to support tools
    which need it.
    The syntax:

    \tt{//~ <field name> <field contents>}

    can be used to attach meta data to the message. The field name should consist
    of a domain prefix (possibly the conventional file extension of the file format
    the field is inspired by), a hyphen and the actual field name in
    underscore-delimited notation. For storage in TS files, the field name together
    with the prefix "extra-" will form an XML element name. The field contents will
    be XML-escaped, but otherwise appear verbatim as the element's contents.
    Any number of unique fields can be added to each message.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp meta data

    Meta data appearing right in front of a magic TRANSLATOR comment applies to the
    whole TS file.

    \section1 Character Encodings

    You can set the encoding for \a sourceText by calling QTextCodec::setCodecForTr().
    By default \a sourceText is assumed to be in Latin-1 encoding.

    \section1 Handling Plurals

    If \a n >= 0, all occurrences of \c %n in the resulting string
    are replaced with a decimal representation of \a n. In addition,
    depending on \a n's value, the translation text may vary.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 18

    The table below shows what string is returned depending on the
    active translation:

    \table
    \header \o      \o{3,1} Active Translation
    \header \o \a n \o No Translation        \o French                                 \o English
    \row    \o 0    \o "0 message(s) saved"  \o "0 message sauvegard\unicode{0xE9}"    \o "0 message\bold{s} saved"
    \row    \o 1    \o "1 message(s) saved"  \o "1 message sauvegard\unicode{0xE9}"    \o "1 message saved"
    \row    \o 2    \o "2 message(s) saved"  \o "2 message\bold{s} sauvegard\unicode{0xE9}\bold{s}"  \o "2 message\bold{s} saved"
    \row    \o 37   \o "37 message(s) saved" \o "37 message\bold{s} sauvegard\unicode{0xE9}\bold{s}" \o "37 message\bold{s} saved"
    \endtable

    This idiom is more flexible than the traditional approach; e.g.,

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 19

    because it also works with target languages that have several
    plural forms (e.g., Irish has a special "dual" form that should
    be used when \c n is 2), and it handles the \e n == 0 case
    correctly for languages such as French that require the singular.
    See the \l{Qt Linguist Manual} for details.

    Instead of \c %n, you can use \c %Ln to produce a localized
    representation of \a n. The conversion uses the default locale,
    set using QLocale::setDefault(). (If no default locale was
    specified, the "C" locale is used.)

    \warning This method is reentrant only if all translators are
    installed \e before calling this method. Installing or removing
    translators while performing translations is not supported. Doing
    so will probably result in crashes or other undesirable behavior.

    \sa trUtf8(), QApplication::translate(), QTextCodec::setCodecForTr(), {Internationalization with Qt}
*/

/*!
    \fn QString QObject::trUtf8(const char *sourceText, const char *disambiguation, int n)
    \reentrant

    Returns a translated version of \a sourceText, or
    QString::fromUtf8(\a sourceText) if there is no appropriate
    version. It is otherwise identical to tr(\a sourceText, \a
    disambiguation, \a n).

    Note that using the Utf8 variants of the translation functions
    is not required if \c CODECFORTR is already set to UTF-8 in the
    qmake project file and QTextCodec::setCodecForTr("UTF-8") is
    used.

    \warning This method is reentrant only if all translators are
    installed \e before calling this method. Installing or removing
    translators while performing translations is not supported. Doing
    so will probably result in crashes or other undesirable behavior.

    \warning For portability reasons, we recommend that you use
    escape sequences for specifying non-ASCII characters in string
    literals to trUtf8(). For example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 20

    \sa tr(), QApplication::translate(), {Internationalization with Qt}
*/




/*****************************************************************************
  Signals and slots
 *****************************************************************************/


const int flagged_locations_count = 2;
static const char* flagged_locations[flagged_locations_count] = {0};

const char *qFlagLocation(const char *method)
{
    static int idx = 0;
    flagged_locations[idx] = method;
    idx = (idx+1) % flagged_locations_count;
    return method;
}

static int extract_code(const char *member)
{
    // extract code, ensure QMETHOD_CODE <= code <= QSIGNAL_CODE
    return (((int)(*member) - '0') & 0x3);
}

static const char * extract_location(const char *member)
{
    for (int i = 0; i < flagged_locations_count; ++i) {
        if (member == flagged_locations[i]) {
            // signature includes location information after the first null-terminator
            const char *location = member + qstrlen(member) + 1;
            if (*location != '\0')
                return location;
            return 0;
        }
    }
    return 0;
}

static bool check_signal_macro(const QObject *sender, const char *signal,
                                const char *func, const char *op)
{
    int sigcode = extract_code(signal);
    if (sigcode != QSIGNAL_CODE) {
        if (sigcode == QSLOT_CODE)
            qWarning("Object::%s: Attempt to %s non-signal %s::%s",
                     func, op, sender->metaObject()->className(), signal+1);
        else
            qWarning("Object::%s: Use the SIGNAL macro to %s %s::%s",
                     func, op, sender->metaObject()->className(), signal);
        return false;
    }
    return true;
}

static bool check_method_code(int code, const QObject *object,
                               const char *method, const char *func)
{
    if (code != QSLOT_CODE && code != QSIGNAL_CODE) {
        qWarning("Object::%s: Use the SLOT or SIGNAL macro to "
                 "%s %s::%s", func, func, object->metaObject()->className(), method);
        return false;
    }
    return true;
}

static void err_method_notfound(const QObject *object,
                                const char *method, const char *func)
{
    const char *type = "method";
    switch (extract_code(method)) {
        case QSLOT_CODE:   type = "slot";   break;
        case QSIGNAL_CODE: type = "signal"; break;
    }
    const char *loc = extract_location(method);
    if (strchr(method,')') == 0)                // common typing mistake
        qWarning("Object::%s: Parentheses expected, %s %s::%s%s%s",
                 func, type, object->metaObject()->className(), method+1,
                 loc ? " in ": "", loc ? loc : "");
    else
        qWarning("Object::%s: No such %s %s::%s%s%s",
                 func, type, object->metaObject()->className(), method+1,
                 loc ? " in ": "", loc ? loc : "");

}


static void err_info_about_objects(const char * func,
                                    const QObject * sender,
                                    const QObject * receiver)
{
    QString a = sender ? sender->objectName() : QString();
    QString b = receiver ? receiver->objectName() : QString();
    if (!a.isEmpty())
        qWarning("Object::%s:  (sender name:   '%s')", func, a.toLocal8Bit().data());
    if (!b.isEmpty())
        qWarning("Object::%s:  (receiver name: '%s')", func, b.toLocal8Bit().data());
}

/*!
    Returns a pointer to the object that sent the signal, if called in
    a slot activated by a signal; otherwise it returns 0. The pointer
    is valid only during the execution of the slot that calls this
    function from this object's thread context.

    The pointer returned by this function becomes invalid if the
    sender is destroyed, or if the slot is disconnected from the
    sender's signal.

    \warning This function violates the object-oriented principle of
    modularity. However, getting access to the sender might be useful
    when many signals are connected to a single slot.

    \warning As mentioned above, the return value of this function is
    not valid when the slot is called via a Qt::DirectConnection from
    a thread different from this object's thread. Do not use this
    function in this type of scenario.

    \sa QSignalMapper
*/

QObject *QObject::sender() const
{
    Q_D(const QObject);

    QMutexLocker(signalSlotLock(this));
    if (!d->currentSender)
        return 0;

    // Return 0 if d->currentSender isn't in d->senders
    bool found = false;
    for (QObjectPrivate::Connection *c = d->senders; c && !found; c = c->next)
        found = (c->sender == d->currentSender->sender);
    if (!found)
        return 0;
    return d->currentSender->sender;
}

/*!
    Returns the number of receivers connected to the \a signal.

    Since both slots and signals can be used as receivers for signals,
    and the same connections can be made many times, the number of
    receivers is the same as the number of connections made from this
    signal.

    When calling this function, you can use the \c SIGNAL() macro to
    pass a specific signal:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 21

    As the code snippet above illustrates, you can use this function
    to avoid emitting a signal that nobody listens to.

    \warning This function violates the object-oriented principle of
    modularity. However, it might be useful when you need to perform
    expensive initialization only if something is connected to a
    signal.
*/

int QObject::receivers(const char *signal) const
{
    int receivers = 0;
    if (signal) {
        QByteArray signal_name = QMetaObject::normalizedSignature(signal);
        signal = signal_name;
#ifndef QT_NO_DEBUG
        if (!check_signal_macro(this, signal, "receivers", "bind"))
            return 0;
#endif
        signal++; // skip code
        const QMetaObject *smeta = this->metaObject();
        int signal_index = smeta->indexOfSignal(signal);
        if (signal_index < 0) {
#ifndef QT_NO_DEBUG
            err_method_notfound(this, signal-1, "receivers");
#endif
            return false;
        }

        Q_D(const QObject);
        QMutexLocker locker(signalSlotLock(this));
        if (d->connectionLists) {
            if (signal_index < d->connectionLists->count()) {
                const QObjectPrivate::ConnectionList &connectionList =
                    d->connectionLists->at(signal_index);
                for (int i = 0; i < connectionList.count(); ++i) {
                    const QObjectPrivate::Connection *c = connectionList.at(i);
                    receivers += c->receiver ? 1 : 0;
                }
            }
        }
    }
    return receivers;
}

/*!
    \threadsafe

    Creates a connection of the given \a type from the \a signal in
    the \a sender object to the \a method in the \a receiver object.
    Returns true if the connection succeeds; otherwise returns false.

    You must use the \c SIGNAL() and \c SLOT() macros when specifying
    the \a signal and the \a method, for example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 22

    This example ensures that the label always displays the current
    scroll bar value. Note that the signal and slots parameters must not
    contain any variable names, only the type. E.g. the following would
    not work and return false:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 23

    A signal can also be connected to another signal:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 24

    In this example, the \c MyWidget constructor relays a signal from
    a private member variable, and makes it available under a name
    that relates to \c MyWidget.

    A signal can be connected to many slots and signals. Many signals
    can be connected to one slot.

    If a signal is connected to several slots, the slots are activated
    in the same order as the order the connection was made, when the
    signal is emitted.

    The function returns true if it successfully connects the signal
    to the slot. It will return false if it cannot create the
    connection, for example, if QObject is unable to verify the
    existence of either \a signal or \a method, or if their signatures
    aren't compatible.

    By default, a signal is emitted for every connection you make;
    two signals are emitted for duplicate connections. You can break
    all of these connections with a single disconnect() call.
    If you pass the Qt::UniqueConnection \a type, the connection will only
    be made if it is not a duplicate. If there is already a duplicate
    (exact same signal to the exact same slot on the same objects),
    the connection will fail and connect will return false

    The optional \a type parameter describes the type of connection
    to establish. In particular, it determines whether a particular
    signal is delivered to a slot immediately or queued for delivery
    at a later time. If the signal is queued, the parameters must be
    of types that are known to Qt's meta-object system, because Qt
    needs to copy the arguments to store them in an event behind the
    scenes. If you try to use a queued connection and get the error
    message

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 25

    call qRegisterMetaType() to register the data type before you
    establish the connection.

    \sa disconnect(), sender(), qRegisterMetaType()
*/

bool QObject::connect(const QObject *sender, const char *signal,
                      const QObject *receiver, const char *method,
                      Qt::ConnectionType type)
{
    {
        const void *cbdata[] = { sender, signal, receiver, method, &type };
        if (QInternal::activateCallbacks(QInternal::ConnectCallback, (void **) cbdata))
            return true;
    }

#ifndef QT_NO_DEBUG
    bool warnCompat = true;
#endif
    if (type == Qt::AutoCompatConnection) {
        type = Qt::AutoConnection;
#ifndef QT_NO_DEBUG
        warnCompat = false;
#endif
    }

    if (sender == 0 || receiver == 0 || signal == 0 || method == 0) {
        qWarning("QObject::connect: Cannot connect %s::%s to %s::%s",
                 sender ? sender->metaObject()->className() : "(null)",
                 (signal && *signal) ? signal+1 : "(null)",
                 receiver ? receiver->metaObject()->className() : "(null)",
                 (method && *method) ? method+1 : "(null)");
        return false;
    }
    QByteArray tmp_signal_name;

    if (!check_signal_macro(sender, signal, "connect", "bind"))
        return false;
    const QMetaObject *smeta = sender->metaObject();
    const char *signal_arg = signal;
    ++signal; //skip code
    int signal_index = smeta->indexOfSignal(signal);
    if (signal_index < 0) {
        // check for normalized signatures
        tmp_signal_name = QMetaObject::normalizedSignature(signal - 1);
        signal = tmp_signal_name.constData() + 1;

        signal_index = smeta->indexOfSignal(signal);
        if (signal_index < 0) {
            err_method_notfound(sender, signal_arg, "connect");
            err_info_about_objects("connect", sender, receiver);
            return false;
        }
    }

    QByteArray tmp_method_name;
    int membcode = extract_code(method);

    if (!check_method_code(membcode, receiver, method, "connect"))
        return false;
    const char *method_arg = method;
    ++method; // skip code

    const QMetaObject *rmeta = receiver->metaObject();
    int method_index = -1;
    switch (membcode) {
    case QSLOT_CODE:
        method_index = rmeta->indexOfSlot(method);
        break;
    case QSIGNAL_CODE:
        method_index = rmeta->indexOfSignal(method);
        break;
    }
    if (method_index < 0) {
        // check for normalized methods
        tmp_method_name = QMetaObject::normalizedSignature(method);
        method = tmp_method_name.constData();
        switch (membcode) {
        case QSLOT_CODE:
            method_index = rmeta->indexOfSlot(method);
            break;
        case QSIGNAL_CODE:
            method_index = rmeta->indexOfSignal(method);
            break;
        }
    }

    if (method_index < 0) {
        err_method_notfound(receiver, method_arg, "connect");
        err_info_about_objects("connect", sender, receiver);
        return false;
    }
    if (!QMetaObject::checkConnectArgs(signal, method)) {
        qWarning("QObject::connect: Incompatible sender/receiver arguments"
                 "\n        %s::%s --> %s::%s",
                 sender->metaObject()->className(), signal,
                 receiver->metaObject()->className(), method);
        return false;
    }

    int *types = 0;
    if ((type == Qt::QueuedConnection || type == Qt::BlockingQueuedConnection)
            && !(types = queuedConnectionTypes(smeta->method(signal_index).parameterTypes())))
        return false;

#ifndef QT_NO_DEBUG
    {
        QMetaMethod smethod = smeta->method(signal_index);
        QMetaMethod rmethod = rmeta->method(method_index);
        if (warnCompat) {
            if(smethod.attributes() & QMetaMethod::Compatibility) {
                if (!(rmethod.attributes() & QMetaMethod::Compatibility))
                    qWarning("QObject::connect: Connecting from COMPAT signal (%s::%s)", smeta->className(), signal);
            } else if(rmethod.attributes() & QMetaMethod::Compatibility && membcode != QSIGNAL_CODE) {
                qWarning("QObject::connect: Connecting from %s::%s to COMPAT slot (%s::%s)",
                         smeta->className(), signal, rmeta->className(), method);
            }
        }
    }
#endif
    if (!QMetaObject::connect(sender, signal_index, receiver, method_index, type, types))
        return false;
    const_cast<QObject*>(sender)->connectNotify(signal - 1);
    return true;
}


/*!
    \fn bool QObject::connect(const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const
    \overload connect()
    \threadsafe

    Connects \a signal from the \a sender object to this object's \a
    method.

    Equivalent to connect(\a sender, \a signal, \c this, \a method, \a type).

    Every connection you make emits a signal, so duplicate connections emit
    two signals. You can break a connection using disconnect().

    \sa disconnect()
*/

/*!
    \threadsafe

    Disconnects \a signal in object \a sender from \a method in object
    \a receiver. Returns true if the connection is successfully broken;
    otherwise returns false.

    A signal-slot connection is removed when either of the objects
    involved are destroyed.

    disconnect() is typically used in three ways, as the following
    examples demonstrate.
    \list 1
    \i Disconnect everything connected to an object's signals:

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 26

       equivalent to the non-static overloaded function

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 27

    \i Disconnect everything connected to a specific signal:

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 28

       equivalent to the non-static overloaded function

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 29

    \i Disconnect a specific receiver:

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 30

       equivalent to the non-static overloaded function

       \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 31

    \endlist

    0 may be used as a wildcard, meaning "any signal", "any receiving
    object", or "any slot in the receiving object", respectively.

    The \a sender may never be 0. (You cannot disconnect signals from
    more than one object in a single call.)

    If \a signal is 0, it disconnects \a receiver and \a method from
    any signal. If not, only the specified signal is disconnected.

    If \a receiver is 0, it disconnects anything connected to \a
    signal. If not, slots in objects other than \a receiver are not
    disconnected.

    If \a method is 0, it disconnects anything that is connected to \a
    receiver. If not, only slots named \a method will be disconnected,
    and all other slots are left alone. The \a method must be 0 if \a
    receiver is left out, so you cannot disconnect a
    specifically-named slot on all objects.

    \sa connect()
*/
bool QObject::disconnect(const QObject *sender, const char *signal,
                         const QObject *receiver, const char *method)
{
    if (sender == 0 || (receiver == 0 && method != 0)) {
        qWarning("Object::disconnect: Unexpected null parameter");
        return false;
    }

    {
        const void *cbdata[] = { sender, signal, receiver, method };
        if (QInternal::activateCallbacks(QInternal::DisconnectCallback, (void **) cbdata))
            return true;
    }

    const char *signal_arg = signal;
    QByteArray signal_name;
    bool signal_found = false;
    if (signal) {
        signal_name = QMetaObject::normalizedSignature(signal);
        signal = signal_name;

        if (!check_signal_macro(sender, signal, "disconnect", "unbind"))
            return false;
        signal++; // skip code
    }

    QByteArray method_name;
    const char *method_arg = method;
    int membcode = -1;
    bool method_found = false;
    if (method) {
        method_name = QMetaObject::normalizedSignature(method);
        method = method_name;
        membcode = extract_code(method);
        if (!check_method_code(membcode, receiver, method, "disconnect"))
            return false;
        method++; // skip code
    }

    /* We now iterate through all the sender's and receiver's meta
     * objects in order to also disconnect possibly shadowed signals
     * and slots with the same signature.
    */
    bool res = false;
    const QMetaObject *smeta = sender->metaObject();
    do {
        int signal_index = -1;
        if (signal) {
            signal_index = smeta->indexOfSignal(signal);
            if (signal_index < smeta->methodOffset())
                continue;
            signal_found = true;
        }

        if (!method) {
            res |= QMetaObject::disconnect(sender, signal_index, receiver, -1);
        } else {
            const QMetaObject *rmeta = receiver->metaObject();
            do {
                int method_index = rmeta->indexOfMethod(method);
                if (method_index >= 0)
                    while (method_index < rmeta->methodOffset())
                            rmeta = rmeta->superClass();
                if (method_index < 0)
                    break;
                res |= QMetaObject::disconnect(sender, signal_index, receiver, method_index);
                method_found = true;
            } while ((rmeta = rmeta->superClass()));
        }
    } while (signal && (smeta = smeta->superClass()));

    if (signal && !signal_found) {
        err_method_notfound(sender, signal_arg, "disconnect");
        err_info_about_objects("disconnect", sender, receiver);
    } else if (method && !method_found) {
        err_method_notfound(receiver, method_arg, "disconnect");
        err_info_about_objects("disconnect", sender, receiver);
    }
    if (res)
        const_cast<QObject*>(sender)->disconnectNotify(signal ? (signal - 1) : 0);
    return res;
}


/*!
    \threadsafe

    \fn bool QObject::disconnect(const char *signal, const QObject *receiver, const char *method)
    \overload disconnect()

    Disconnects \a signal from \a method of \a receiver.

    A signal-slot connection is removed when either of the objects
    involved are destroyed.
*/

/*!
    \fn bool QObject::disconnect(const QObject *receiver, const char *method)
    \overload disconnect()

    Disconnects all signals in this object from \a receiver's \a
    method.

    A signal-slot connection is removed when either of the objects
    involved are destroyed.
*/


/*!
    \fn void QObject::connectNotify(const char *signal)

    This virtual function is called when something has been connected
    to \a signal in this object.

    If you want to compare \a signal with a specific signal, use
    QLatin1String and the \c SIGNAL() macro as follows:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 32

    If the signal contains multiple parameters or parameters that
    contain spaces, call QMetaObject::normalizedSignature() on
    the result of the \c SIGNAL() macro.

    \warning This function violates the object-oriented principle of
    modularity. However, it might be useful when you need to perform
    expensive initialization only if something is connected to a
    signal.

    \sa connect(), disconnectNotify()
*/

void QObject::connectNotify(const char *)
{
}

/*!
    \fn void QObject::disconnectNotify(const char *signal)

    This virtual function is called when something has been
    disconnected from \a signal in this object.

    See connectNotify() for an example of how to compare
    \a signal with a specific signal.

    \warning This function violates the object-oriented principle of
    modularity. However, it might be useful for optimizing access to
    expensive resources.

    \sa disconnect(), connectNotify()
*/

void QObject::disconnectNotify(const char *)
{
}

/*!\internal

  \a types is a 0-terminated vector of meta types for queued
  connections.

  if \a signal_index is -1, then we effectively connect *all* signals
  from the sender to the receiver's slot
*/
bool QMetaObject::connect(const QObject *sender, int signal_index,
                          const QObject *receiver, int method_index, int type, int *types)
{
    QObject *s = const_cast<QObject *>(sender);
    QObject *r = const_cast<QObject *>(receiver);

    QOrderedMutexLocker locker(signalSlotLock(sender),
                               signalSlotLock(receiver));

    if (type & Qt::UniqueConnection) {
        QObjectConnectionListVector *connectionLists = s->d_func()->connectionLists;
        if (connectionLists && connectionLists->count() > signal_index) {
            QObjectPrivate::ConnectionList &connectionList = (*connectionLists)[signal_index];
            for (int i = 0; i < connectionList.count(); ++i) {
                QObjectPrivate::Connection *c2 = connectionList.at(i);
                if (c2->receiver == receiver && c2->method == method_index)
                    return false;
            }
        }
        type &= Qt::UniqueConnection - 1;
    }

    QObjectPrivate::Connection *c = new QObjectPrivate::Connection;
    c->sender = s;
    c->receiver = r;
    c->method = method_index;
    c->connectionType = type;
    c->argumentTypes = types;
    c->prev = &r->d_func()->senders;
    c->next = *c->prev;
    *c->prev = c;
    if (c->next)
        c->next->prev = &c->next;

    s->d_func()->addConnection(signal_index, c);

    if (signal_index < 0)
        sender->d_func()->connectedSignals = ~0u;
    else if (signal_index < 32)
        sender->d_func()->connectedSignals |= (1 << signal_index);

    return true;
}


/*!\internal
 */
bool QMetaObject::disconnect(const QObject *sender, int signal_index,
                             const QObject *receiver, int method_index)
{
    if (!sender)
        return false;

    QObject *s = const_cast<QObject *>(sender);
    QObject *r = const_cast<QObject *>(receiver);

    QMutex *senderMutex = signalSlotLock(sender);
    QMutex *receiverMutex = receiver ? signalSlotLock(receiver) : 0;
    QOrderedMutexLocker locker(senderMutex, receiverMutex);

    QObjectConnectionListVector *connectionLists = s->d_func()->connectionLists;
    if (!connectionLists)
        return false;

    // prevent incoming connections changing the connectionLists while unlocked
    ++connectionLists->inUse;

    bool success = false;
    if (signal_index < 0) {
        // remove from all connection lists
        for (signal_index = -1; signal_index < connectionLists->count(); ++signal_index) {
            QObjectPrivate::ConnectionList &connectionList = (*connectionLists)[signal_index];
            for (int i = 0; i < connectionList.count(); ++i) {
                QObjectPrivate::Connection *c = connectionList[i];
                if (c->receiver
                    && (r == 0 || (c->receiver == r
                                   && (method_index < 0 || c->method == method_index)))) {
                    QMutex *m = signalSlotLock(c->receiver);
                    bool needToUnlock = false;
                    if (!receiverMutex && senderMutex != m) {
                        // need to relock this receiver and sender in the correct order
                        needToUnlock = QOrderedMutexLocker::relock(senderMutex, m);
                        c = connectionList[i];
                    }
                    if (c->receiver) {
                        *c->prev = c->next;
                        if (c->next) c->next->prev = c->prev;
                    }

                    if (needToUnlock)
                        m->unlock();

                    c->receiver = 0;

                    success = true;
                    connectionLists->dirty = true;
                }
            }
        }
    } else if (signal_index < connectionLists->count()) {
        QObjectPrivate::ConnectionList &connectionList = (*connectionLists)[signal_index];
        for (int i = 0; i < connectionList.count(); ++i) {
            QObjectPrivate::Connection *c = connectionList[i];
            if (c->receiver
                && (r == 0 || (c->receiver == r
                               && (method_index < 0 || c->method == method_index)))) {
                QMutex *m = signalSlotLock(c->receiver);
                bool needToUnlock = false;
                if (!receiverMutex && senderMutex != m) {
                    // need to relock this receiver and sender in the correct order
                    needToUnlock = QOrderedMutexLocker::relock(senderMutex, m);
                    c = connectionList[i];
                }
                if (c->receiver) {
                    *c->prev = c->next;
                    if (c->next) c->next->prev = c->prev;
                }

                if (needToUnlock)
                    m->unlock();
                c->receiver = 0;

                success = true;
                connectionLists->dirty = true;
            }
        }
    }

    --connectionLists->inUse;
    Q_ASSERT(connectionLists->inUse >= 0);
    if (connectionLists->orphaned && !connectionLists->inUse)
        delete connectionLists;

    return success;
}

/*!
    \fn void QMetaObject::connectSlotsByName(QObject *object)

    Searches recursively for all child objects of the given \a object, and connects
    matching signals from them to slots of \a object that follow the following form:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 33

    Let's assume our object has a child object of type QPushButton with
    the \l{QObject::objectName}{object name} \c{button1}. The slot to catch the
    button's \c{clicked()} signal would be:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 34

    \sa QObject::setObjectName()
 */
void QMetaObject::connectSlotsByName(QObject *o)
{
    if (!o)
        return;
    const QMetaObject *mo = o->metaObject();
    Q_ASSERT(mo);
    const QObjectList list = qFindChildren<QObject *>(o, QString());
    for (int i = 0; i < mo->methodCount(); ++i) {
        const char *slot = mo->method(i).signature();
        Q_ASSERT(slot);
        if (slot[0] != 'o' || slot[1] != 'n' || slot[2] != '_')
            continue;
        bool foundIt = false;
        for(int j = 0; j < list.count(); ++j) {
            const QObject *co = list.at(j);
            QByteArray objName = co->objectName().toAscii();
            int len = objName.length();
            if (!len || qstrncmp(slot + 3, objName.data(), len) || slot[len+3] != '_')
                continue;
            const QMetaObject *smo = co->metaObject();
            int sigIndex = smo->indexOfMethod(slot + len + 4);
            if (sigIndex < 0) { // search for compatible signals
                int slotlen = qstrlen(slot + len + 4) - 1;
                for (int k = 0; k < co->metaObject()->methodCount(); ++k) {
                    if (smo->method(k).methodType() != QMetaMethod::Signal)
                        continue;

                    if (!qstrncmp(smo->method(k).signature(), slot + len + 4, slotlen)) {
                        sigIndex = k;
                        break;
                    }
                }
            }
            if (sigIndex < 0)
                continue;
            if (QMetaObject::connect(co, sigIndex, o, i)) {
                foundIt = true;
                break;
            }
        }
        if (foundIt) {
            // we found our slot, now skip all overloads
            while (mo->method(i + 1).attributes() & QMetaMethod::Cloned)
                  ++i;
        } else if (!(mo->method(i).attributes() & QMetaMethod::Cloned)) {
            qWarning("QMetaObject::connectSlotsByName: No matching signal for %s", slot);
        }
    }
}

static void queued_activate(QObject *sender, int signal, QObjectPrivate::Connection *c,
                            void **argv, QSemaphore *semaphore = 0)
{
    if (!c->argumentTypes && c->argumentTypes != &DIRECT_CONNECTION_ONLY) {
        QMetaMethod m = sender->metaObject()->method(signal);
        int *tmp = queuedConnectionTypes(m.parameterTypes());
        if (!tmp) // cannot queue arguments
            tmp = &DIRECT_CONNECTION_ONLY;
        if (!c->argumentTypes.testAndSetOrdered(0, tmp)) {
            if (tmp != &DIRECT_CONNECTION_ONLY)
                delete [] tmp;
        }
    }
    if (c->argumentTypes == &DIRECT_CONNECTION_ONLY) // cannot activate
        return;
    int nargs = 1; // include return type
    while (c->argumentTypes[nargs-1])
        ++nargs;
    int *types = (int *) qMalloc(nargs*sizeof(int));
    void **args = (void **) qMalloc(nargs*sizeof(void *));
    types[0] = 0; // return type
    args[0] = 0; // return value
    for (int n = 1; n < nargs; ++n)
        args[n] = QMetaType::construct((types[n] = c->argumentTypes[n-1]), argv[n]);
    QCoreApplication::postEvent(c->receiver, new QMetaCallEvent(c->method,
                                                               sender,
                                                               signal,
                                                               nargs,
                                                               types,
                                                               args,
                                                               semaphore));
}

static void blocking_activate(QObject *sender, int signal, QObjectPrivate::Connection *c, void **argv)
{
    if (QThread::currentThread() == c->receiver->thread()) {
        qWarning("Qt: Dead lock detected while activating a BlockingQueuedConnection: "
                 "Sender is %s(%p), receiver is %s(%p)",
                 sender->metaObject()->className(), sender,
                 c->receiver->metaObject()->className(), c->receiver);
    }

#ifdef QT_NO_THREAD
    queued_activate(sender, signal, c, argv);
#else
    QSemaphore semaphore;
    queued_activate(sender, signal, c, argv, &semaphore);
    QMutex *mutex = signalSlotLock(sender);
    mutex->unlock();
    semaphore.acquire();
    mutex->lock();
#endif
}

/*!\internal
 */
void QMetaObject::activate(QObject *sender, int from_signal_index, int to_signal_index, void **argv)
{
    if (sender->d_func()->blockSig)
        return;

    void *empty_argv[] = { 0 };
    if (qt_signal_spy_callback_set.signal_begin_callback != 0) {
        qt_signal_spy_callback_set.signal_begin_callback(sender, from_signal_index,
                                                         argv ? argv : empty_argv);
    }

    QMutexLocker locker(signalSlotLock(sender));
    QThreadData *currentThreadData = QThreadData::current();

    QObjectConnectionListVector *connectionLists = sender->d_func()->connectionLists;
    if (!connectionLists) {
        if (qt_signal_spy_callback_set.signal_end_callback != 0)
            qt_signal_spy_callback_set.signal_end_callback(sender, from_signal_index);
        return;
    }
    ++connectionLists->inUse;

    // emit signals in the following order: from_signal_index <= signals <= to_signal_index, signal < 0
    for (int signal = from_signal_index;
         (signal >= from_signal_index && signal <= to_signal_index) || (signal == -2);
         (signal == to_signal_index ? signal = -2 : ++signal))
    {
        if (signal >= connectionLists->count()) {
            signal = to_signal_index;
            continue;
        }
        int count = connectionLists->at(signal).count();
        for (int i = 0; i < count; ++i) {
            QObjectPrivate::Connection *c = connectionLists->at(signal)[i];
            if (!c->receiver)
                continue;

            QObject * const receiver = c->receiver;

            // determine if this connection should be sent immediately or
            // put into the event queue
            if ((c->connectionType == Qt::AutoConnection
                 && (currentThreadData != sender->d_func()->threadData
                     || receiver->d_func()->threadData != sender->d_func()->threadData))
                || (c->connectionType == Qt::QueuedConnection)) {
                queued_activate(sender, signal, c, argv);
                continue;
            } else if (c->connectionType == Qt::BlockingQueuedConnection) {
                blocking_activate(sender, signal, c, argv);
                continue;
            }

            const int method = c->method;
            QObjectPrivate::Sender currentSender;
            currentSender.sender = sender;
            currentSender.signal = signal < 0 ? from_signal_index : signal;
            currentSender.ref = 1;
            QObjectPrivate::Sender *previousSender = 0;
            if (currentThreadData == receiver->d_func()->threadData)
                previousSender = QObjectPrivate::setCurrentSender(receiver, &currentSender);
            locker.unlock();

            if (qt_signal_spy_callback_set.slot_begin_callback != 0) {
                qt_signal_spy_callback_set.slot_begin_callback(receiver,
                                                               method,
                                                               argv ? argv : empty_argv);
            }

#if defined(QT_NO_EXCEPTIONS)
            receiver->qt_metacall(QMetaObject::InvokeMetaMethod, method, argv ? argv : empty_argv);
#else
            try {
                receiver->qt_metacall(QMetaObject::InvokeMetaMethod, method, argv ? argv : empty_argv);
            } catch (...) {
                locker.relock();

                QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);

                --connectionLists->inUse;
                Q_ASSERT(connectionLists->inUse >= 0);
                if (connectionLists->orphaned && !connectionLists->inUse)
                    delete connectionLists;
                throw;
            }
#endif

            locker.relock();

            if (qt_signal_spy_callback_set.slot_end_callback != 0)
                qt_signal_spy_callback_set.slot_end_callback(receiver, method);

            QObjectPrivate::resetCurrentSender(receiver, &currentSender, previousSender);

            if (connectionLists->orphaned)
                break;
        }

        if (connectionLists->orphaned)
            break;
    }

    --connectionLists->inUse;
    Q_ASSERT(connectionLists->inUse >= 0);
    if (connectionLists->orphaned) {
        if (!connectionLists->inUse)
            delete connectionLists;
    } else {
        sender->d_func()->cleanConnectionLists();
    }

    locker.unlock();

    if (qt_signal_spy_callback_set.signal_end_callback != 0)
        qt_signal_spy_callback_set.signal_end_callback(sender, from_signal_index);
}


/*!\internal
 */
void QMetaObject::activate(QObject *sender, int signal_index, void **argv)
{
    if (signal_index < 32
        && !qt_signal_spy_callback_set.signal_begin_callback
        && !qt_signal_spy_callback_set.signal_end_callback) {
        uint signal_mask = 1 << signal_index;
        if ((sender->d_func()->connectedSignals & signal_mask) == 0)
            // nothing connected to these signals, and no spy
            return;
    }
    activate(sender, signal_index, signal_index, argv);
}

/*!\internal
 */
void QMetaObject::activate(QObject *sender, const QMetaObject *m, int local_signal_index,
                           void **argv)
{
    int signal_index = m->methodOffset() + local_signal_index;
    if (signal_index < 32
        && !qt_signal_spy_callback_set.signal_begin_callback
        && !qt_signal_spy_callback_set.signal_end_callback) {
        uint signal_mask = 1 << signal_index;
        if ((sender->d_func()->connectedSignals & signal_mask) == 0)
            // nothing connected to these signals, and no spy
            return;
    }
    activate(sender, signal_index, signal_index, argv);
}

/*!\internal
 */
void QMetaObject::activate(QObject *sender, const QMetaObject *m,
                           int from_local_signal_index, int to_local_signal_index, void **argv)
{
    int offset = m->methodOffset();
    int from_signal_index = offset + from_local_signal_index;
    int to_signal_index = offset + to_local_signal_index;
    if (to_signal_index < 32
        && !qt_signal_spy_callback_set.signal_begin_callback
        && !qt_signal_spy_callback_set.signal_end_callback) {
        uint signal_mask = (1 << (to_signal_index + 1)) - 1;
        signal_mask ^= (1 << from_signal_index) - 1;
        if ((sender->d_func()->connectedSignals & signal_mask) == 0)
            // nothing connected to these signals, and no spy
            return;
    }
    activate(sender, from_signal_index, to_signal_index, argv);
}


/*****************************************************************************
  Properties
 *****************************************************************************/

#ifndef QT_NO_PROPERTIES

/*!
  Sets the value of the object's \a name property to \a value.

  If the property is defined in the class using Q_PROPERTY then
  true is returned on success and false otherwise. If the property
  is not defined using Q_PROPERTY, and therefore not listed in the
  meta-object, it is added as a dynamic property and false is returned.

  Information about all available properties is provided through the
  metaObject() and dynamicPropertyNames().

  Dynamic properties can be queried again using property() and can be
  removed by setting the property value to an invalid QVariant.
  Changing the value of a dynamic property causes a QDynamicPropertyChangeEvent
  to be sent to the object.

  \bold{Note:} Dynamic properties starting with "_q_" are reserved for internal
  purposes.

  \sa property(), metaObject(), dynamicPropertyNames()
*/
bool QObject::setProperty(const char *name, const QVariant &value)
{
    Q_D(QObject);
    const QMetaObject* meta = metaObject();
    if (!name || !meta)
        return false;

    int id = meta->indexOfProperty(name);
    if (id < 0) {
        if (!d->extraData)
            d->extraData = new QObjectPrivate::ExtraData;

        const int idx = d->extraData->propertyNames.indexOf(name);

        if (!value.isValid()) {
            if (idx == -1)
                return false;
            d->extraData->propertyNames.removeAt(idx);
            d->extraData->propertyValues.removeAt(idx);
        } else {
            if (idx == -1) {
                d->extraData->propertyNames.append(name);
                d->extraData->propertyValues.append(value);
            } else {
                d->extraData->propertyValues[idx] = value;
            }
        }

        QDynamicPropertyChangeEvent ev(name);
        QCoreApplication::sendEvent(this, &ev);

        return false;
    }
    QMetaProperty p = meta->property(id);
#ifndef QT_NO_DEBUG
    if (!p.isWritable())
        qWarning("%s::setProperty: Property \"%s\" invalid,"
                 " read-only or does not exist", metaObject()->className(), name);
#endif
    return p.write(this, value);
}

/*!
  Returns the value of the object's \a name property.

  If no such property exists, the returned variant is invalid.

  Information about all available properties is provided through the
  metaObject() and dynamicPropertyNames().

  \sa setProperty(), QVariant::isValid(), metaObject(), dynamicPropertyNames()
*/
QVariant QObject::property(const char *name) const
{
    Q_D(const QObject);
    const QMetaObject* meta = metaObject();
    if (!name || !meta)
        return QVariant();

    int id = meta->indexOfProperty(name);
    if (id < 0) {
        if (!d->extraData)
            return QVariant();
        const int i = d->extraData->propertyNames.indexOf(name);
        return d->extraData->propertyValues.value(i);
    }
    QMetaProperty p = meta->property(id);
#ifndef QT_NO_DEBUG
    if (!p.isReadable())
        qWarning("%s::property: Property \"%s\" invalid or does not exist",
                 metaObject()->className(), name);
#endif
    return p.read(this);
}

/*!
    \since 4.2

    Returns the names of all properties that were dynamically added to
    the object using setProperty().
*/
QList<QByteArray> QObject::dynamicPropertyNames() const
{
    Q_D(const QObject);
    if (d->extraData)
        return d->extraData->propertyNames;
    return QList<QByteArray>();
}

#endif // QT_NO_PROPERTIES


/*****************************************************************************
  QObject debugging output routines.
 *****************************************************************************/

static void dumpRecursive(int level, QObject *object)
{
#if defined(QT_DEBUG)
    if (object) {
        QByteArray buf;
        buf.fill(' ', level / 2 * 8);
        if (level % 2)
            buf += "    ";
        QString name = object->objectName();
        QString flags = QLatin1String("");
#if 0
        if (qApp->focusWidget() == object)
            flags += 'F';
        if (object->isWidgetType()) {
            QWidget * w = (QWidget *)object;
            if (w->isVisible()) {
                QString t("<%1,%2,%3,%4>");
                flags += t.arg(w->x()).arg(w->y()).arg(w->width()).arg(w->height());
            } else {
                flags += 'I';
            }
        }
#endif
        qDebug("%s%s::%s %s", (const char*)buf, object->metaObject()->className(), name.toLocal8Bit().data(),
               flags.toLatin1().data());
        QObjectList children = object->children();
        if (!children.isEmpty()) {
            for (int i = 0; i < children.size(); ++i)
                dumpRecursive(level+1, children.at(i));
        }
    }
#else
    Q_UNUSED(level)
        Q_UNUSED(object)
#endif
}

/*!
    Dumps a tree of children to the debug output.

    This function is useful for debugging, but does nothing if the
    library has been compiled in release mode (i.e. without debugging
    information).

    \sa dumpObjectInfo()
*/

void QObject::dumpObjectTree()
{
    dumpRecursive(0, this);
}

/*!
    Dumps information about signal connections, etc. for this object
    to the debug output.

    This function is useful for debugging, but does nothing if the
    library has been compiled in release mode (i.e. without debugging
    information).

    \sa dumpObjectTree()
*/

void QObject::dumpObjectInfo()
{
#if defined(QT_DEBUG)
    qDebug("OBJECT %s::%s", metaObject()->className(),
           objectName().isEmpty() ? "unnamed" : objectName().toLocal8Bit().data());

    Q_D(QObject);
    QMutexLocker locker(signalSlotLock(this));

    // first, look for connections where this object is the sender
    qDebug("  SIGNALS OUT");

    if (d->connectionLists) {
        for (int signal_index = 0; signal_index < d->connectionLists->count(); ++signal_index) {
            const QMetaMethod signal = metaObject()->method(signal_index);
            qDebug("        signal: %s", signal.signature());

            // receivers
            const QObjectPrivate::ConnectionList &connectionList = d->connectionLists->at(signal_index);
            for (int i = 0; i < connectionList.count(); ++i) {
                const QObjectPrivate::Connection *c = connectionList.at(i);
                if (!c->receiver) {
                    qDebug("          <Disconnected receiver>");
                    continue;
                }
                const QMetaObject *receiverMetaObject = c->receiver->metaObject();
                const QMetaMethod method = receiverMetaObject->method(c->method);
                qDebug("          --> %s::%s %s",
                       receiverMetaObject->className(),
                       c->receiver->objectName().isEmpty() ? "unnamed" : qPrintable(c->receiver->objectName()),
                       method.signature());
            }
        }
    } else {
        qDebug( "        <None>" );
    }

    // now look for connections where this object is the receiver
    qDebug("  SIGNALS IN");

    if (d->senders) {
        for (QObjectPrivate::Connection *s = d->senders; s; s = s->next) {
            const QMetaMethod slot = metaObject()->method(s->method);
            qDebug("          <-- %s::%s  %s",
                   s->sender->metaObject()->className(),
                   s->sender->objectName().isEmpty() ? "unnamed" : qPrintable(s->sender->objectName()),
                   slot.signature());
        }
    } else {
        qDebug("        <None>");
    }
#endif
}

#ifndef QT_NO_USERDATA
/*!\internal
 */
uint QObject::registerUserData()
{
    static int user_data_registration = 0;
    return user_data_registration++;
}

/*!\internal
 */
QObjectUserData::~QObjectUserData()
{
}

/*!\internal
 */
void QObject::setUserData(uint id, QObjectUserData* data)
{
    Q_D(QObject);
    if (!d->extraData)
        d->extraData = new QObjectPrivate::ExtraData;

    if (d->extraData->userData.size() <= (int) id)
        d->extraData->userData.resize((int) id + 1);
    d->extraData->userData[id] = data;
}

/*!\internal
 */
QObjectUserData* QObject::userData(uint id) const
{
    Q_D(const QObject);
    if (!d->extraData)
        return 0;
    if ((int)id < d->extraData->userData.size())
        return d->extraData->userData.at(id);
    return 0;
}

#endif // QT_NO_USERDATA


#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QObject *o) {
#ifndef Q_BROKEN_DEBUG_STREAM
    if (!o)
        return dbg << "QObject(0x0) ";
    dbg.nospace() << o->metaObject()->className() << '(' << (void *)o;
    if (!o->objectName().isEmpty())
        dbg << ", name = " << o->objectName();
    dbg << ')';
    return dbg.space();
#else
    qWarning("This compiler doesn't support streaming QObject to QDebug");
    return dbg;
    Q_UNUSED(o);
#endif
}
#endif

/*!
  \fn void QObject::insertChild(QObject *object)

  Use setParent() instead, i.e., call object->setParent(this).
*/

/*!
  \fn void QObject::removeChild(QObject *object)

  Use setParent() instead, i.e., call object->setParent(0).
*/

/*!
  \fn bool QObject::isA(const char *className) const

  Compare \a className with the object's metaObject()->className() instead.
*/

/*!
  \fn const char *QObject::className() const

  Use metaObject()->className() instead.
*/

/*!
  \fn const char *QObject::name() const

  Use objectName() instead.
*/

/*!
  \fn const char *QObject::name(const char *defaultName) const

  Use objectName() instead.
*/

/*!
  \fn void QObject::setName(const char *name)

  Use setObjectName() instead.
*/

/*!
  \fn bool QObject::checkConnectArgs(const char *signal, const
  QObject *object, const char *method)

  Use QMetaObject::checkConnectArgs() instead.
*/

/*!
  \fn QByteArray QObject::normalizeSignalSlot(const char *signalSlot)

  Use QMetaObject::normalizedSignature() instead.
*/

/*!
  \fn const char *QMetaObject::superClassName() const

  \internal
*/

/*!
    \macro Q_CLASSINFO(Name, Value)
    \relates QObject

    This macro associates extra information to the class, which is
    available using QObject::metaObject(). Except for the ActiveQt
    extension, Qt doesn't use this information.

    The extra information takes the form of a \a Name string and a \a
    Value literal string.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 35

    \sa QMetaObject::classInfo()
*/

/*!
    \macro Q_INTERFACES(...)
    \relates QObject

    This macro tells Qt which interfaces the class implements. This
    is used when implementing plugins.

    Example:

    \snippet examples/tools/plugandpaintplugins/basictools/basictoolsplugin.h 1
    \dots
    \snippet examples/tools/plugandpaintplugins/basictools/basictoolsplugin.h 3

    See the \l{tools/plugandpaintplugins/basictools}{Plug & Paint
    Basic Tools} example for details.

    \sa Q_DECLARE_INTERFACE(), Q_EXPORT_PLUGIN2(), {How to Create Qt Plugins}
*/

/*!
    \macro Q_PROPERTY(...)
    \relates QObject

    This macro is used for declaring properties in classes that
    inherit QObject. Properties behave like class data members, but
    they have additional features accessible through the \l
    {Meta-Object System}.

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 36

    The property name and type and the \c READ function are required.
    The type can be any type supported by QVariant, or it can be a
    user-defined type.  The other items are optional, but a \c WRITE
    function is common.  The attributes default to true except \c USER,
    which defaults to false.

    For example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 37

    For more details about how to use this macro, and a more detailed
    example of its use, see the discussion on \l {Qt's Property System}.

    \sa {Qt's Property System}
*/

/*!
    \macro Q_ENUMS(...)
    \relates QObject

    This macro registers one or several enum types to the meta-object
    system.

    For example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 38

    If you want to register an enum that is declared in another class,
    the enum must be fully qualified with the name of the class
    defining it. In addition, the class \e defining the enum has to
    inherit QObject as well as declare the enum using Q_ENUMS().

    \sa {Qt's Property System}
*/

/*!
    \macro Q_FLAGS(...)
    \relates QObject

    This macro registers one or several \l{QFlags}{flags types} to the
    meta-object system.

    Example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qobject.cpp 39

    \note This macro takes care of registering individual flag values
    with the meta-object system, so it is unnecessary to use Q_ENUMS()
    in addition to this macro.

    \sa {Qt's Property System}
*/

/*!
    \macro Q_OBJECT
    \relates QObject

    The Q_OBJECT macro must appear in the private section of a class
    definition that declares its own signals and slots or that uses
    other services provided by Qt's meta-object system.

    For example:

    \snippet doc/src/snippets/signalsandslots/signalsandslots.h 1
    \codeline
    \snippet doc/src/snippets/signalsandslots/signalsandslots.h 2
    \snippet doc/src/snippets/signalsandslots/signalsandslots.h 3

    \note This macro requires the class to be a subclass of QObject. Use
    Q_GADGET instead of Q_OBJECT to enable the meta object system's support
    for enums in a class that is not a QObject subclass. Q_GADGET makes a
    class member, \c{staticMetaObject}, available.
    \c{staticMetaObject} is of type QMetaObject and provides access to the
    enums declared with Q_ENUMS.
    Q_GADGET is provided only for C++.

    \sa {Meta-Object System}, {Signals and Slots}, {Qt's Property System}
*/

/*!
    \macro Q_SIGNALS
    \relates QObject

    Use this macro to replace the \c signals keyword in class
    declarations, when you want to use Qt Signals and Slots with a
    \l{3rd Party Signals and Slots} {3rd party signal/slot mechanism}.

    The macro is normally used when \c no_keywords is specified with
    the \c CONFIG variable in the \c .pro file, but it can be used
    even when \c no_keywords is \e not specified.
*/

/*!
    \macro Q_SIGNAL
    \relates QObject

    This is an additional macro that allows you to mark a single
    function as a signal. It can be quite useful, especially when you
    use a 3rd-party source code parser which doesn't understand a \c
    signals or \c Q_SIGNALS groups.

    Use this macro to replace the \c signals keyword in class
    declarations, when you want to use Qt Signals and Slots with a
    \l{3rd Party Signals and Slots} {3rd party signal/slot mechanism}.

    The macro is normally used when \c no_keywords is specified with
    the \c CONFIG variable in the \c .pro file, but it can be used
    even when \c no_keywords is \e not specified.
*/

/*!
    \macro Q_SLOTS
    \relates QObject

    Use this macro to replace the \c slots keyword in class
    declarations, when you want to use Qt Signals and Slots with a
    \l{3rd Party Signals and Slots} {3rd party signal/slot mechanism}.

    The macro is normally used when \c no_keywords is specified with
    the \c CONFIG variable in the \c .pro file, but it can be used
    even when \c no_keywords is \e not specified.
*/

/*!
    \macro Q_SLOT
    \relates QObject

    This is an additional macro that allows you to mark a single
    function as a slot. It can be quite useful, especially when you
    use a 3rd-party source code parser which doesn't understand a \c
    slots or \c Q_SLOTS groups.

    Use this macro to replace the \c slots keyword in class
    declarations, when you want to use Qt Signals and Slots with a
    \l{3rd Party Signals and Slots} {3rd party signal/slot mechanism}.

    The macro is normally used when \c no_keywords is specified with
    the \c CONFIG variable in the \c .pro file, but it can be used
    even when \c no_keywords is \e not specified.
*/

/*!
    \macro Q_EMIT
    \relates QObject

    Use this macro to replace the \c emit keyword for emitting
    signals, when you want to use Qt Signals and Slots with a
    \l{3rd Party Signals and Slots} {3rd party signal/slot mechanism}.

    The macro is normally used when \c no_keywords is specified with
    the \c CONFIG variable in the \c .pro file, but it can be used
    even when \c no_keywords is \e not specified.
*/

/*!
    \macro Q_INVOKABLE
    \relates QObject

    Apply this macro to definitions of member functions to allow them to
    be invoked via the meta-object system. The macro is written before
    the return type, as shown in the following example:

    \snippet snippets/qmetaobject-invokable/window.h Window class with invokable method

    The \c invokableMethod() function is marked up using Q_INVOKABLE, causing
    it to be registered with the meta-object system and enabling it to be
    invoked using QMetaObject::invokeMethod().
    Since \c normalMethod() function is not registered in this way, it cannot
    be invoked using QMetaObject::invokeMethod().
*/

/*!
    \typedef QObjectList
    \relates QObject

    Synonym for QList<QObject *>.
*/

#ifdef QT_JAMBI_BUILD
class QDPtrAccessor : public QObject {
public:
    QObjectData *d() const { return d_ptr; }
};
#endif

void qDeleteInEventHandler(QObject *o)
{
#ifdef QT_JAMBI_BUILD
    if (!o)
        return;
    ((QDPtrAccessor *) o)->d()->inEventHandler = false;
#endif
    delete o;
}

QT_END_NAMESPACE

#include "moc_qobject.cpp"