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1 module qt.core.QMetaObject;
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2
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3 import
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4 qt.Core,
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5 qt.core.QObject,
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6 qt.QtdObject;
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7
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8 /++
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9 Meta-object for QObject classes.
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10 +/
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11 final class QMetaObject : QtdMetaObjectBase
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12 {
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13 alias typeof(this) This;
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14
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15 this(void* nativeId, QtdMetaObjectBase base, CreateWrapper createWrapper)
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16 {
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17 super(nativeId, base, createWrapper);
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18 }
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19
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20 private QMetaObject lookupDerived(void*[] moIds)
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21 {
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22 assert (moIds.length >= 1);
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23
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24 for (auto mo = static_cast!(This)(firstDerived); mo !is null; mo = static_cast!(This)(mo.next))
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25 {
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26 if (mo.nativeId == moIds[0])
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27 {
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28 if (moIds.length == 1) // exact match found
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29 return mo;
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30 else // look deeper
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31 return mo.lookupDerived(moIds[1..$]);
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32 }
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33 }
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34
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35 // no initialized wrapper that matches the native object.
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36 // use the base class wrapper
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37 return this;
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38 }
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39
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40 QObject wrap(void* nativeObjId, QtdObjectFlags flags = QtdObjectFlags.none)
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41 {
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42 QObject result;
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43
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44 if (nativeObjId)
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45 {
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46 result = cast(QObject)qtd_get_d_qobject(nativeObjId);
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47 if (!result)
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48 {
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49 auto moId = qtd_QObject_typeId(nativeObjId);
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50 if (nativeId == moId)
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51 result = static_cast!(QObject)(_createWrapper(nativeObjId, flags));
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52 else
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53 {
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54 // get native metaobjects for the entire derivation lattice
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55 // up to, but not including, the current metaobject.
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56 size_t moCount = 1;
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57
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58 for (void* tmp = moId;;)
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59 {
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60 tmp = qtd_QMetaObject_superClass(tmp);
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61 if (!tmp)
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62 return null;
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63
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64 if (tmp == nativeId)
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65 break;
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66 moCount++;
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67 }
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68
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69 void*[] moIds = (cast(void**)alloca(moCount * (void*).sizeof))[0..moCount];
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70
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71 moIds[--moCount] = moId;
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72 while (moCount > 0)
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73 moIds[--moCount] = moId = qtd_QMetaObject_superClass(moId);
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74
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75 auto mo = lookupDerived(moIds);
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76 result = static_cast!(QObject)(mo._createWrapper(nativeObjId, flags));
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77 }
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78 }
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79 }
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80
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81 return result;
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82 }
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83 }
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84
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85 extern(C) void* qtd_QMetaObject_superClass(void* nativeId); |
