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basichandler.cpp
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20 
21 #include "basichandler.h"
22 
23 #include <QMetaMethod>
24 
25 #include "logger.h"
26 
28  : QObject(parent),
29  _defaultHandler(-1),
30  _initDone(false),
31  _methodPrefix("handle")
32 {
33 }
34 
35 
36 BasicHandler::BasicHandler(const QString &methodPrefix, QObject *parent)
37  : QObject(parent),
38  _defaultHandler(-1),
39  _initDone(false),
40  _methodPrefix(methodPrefix)
41 {
42 }
43 
44 
46 {
47  return handlerHash().keys();
48 }
49 
50 
51 const QHash<QString, int> &BasicHandler::handlerHash()
52 {
53  if (!_initDone) {
54  for (int i = metaObject()->methodOffset(); i < metaObject()->methodCount(); i++) {
55 #if QT_VERSION >= 0x050000
56  QString methodSignature = metaObject()->method(i).methodSignature();
57 #else
58  QString methodSignature = metaObject()->method(i).signature();
59 #endif
60  if (methodSignature.startsWith("defaultHandler")) {
61  _defaultHandler = i;
62  continue;
63  }
64 
65  if (!methodSignature.startsWith(_methodPrefix))
66  continue;
67 
68  methodSignature = methodSignature.section('(', 0, 0); // chop the attribute list
69  methodSignature = methodSignature.mid(_methodPrefix.length()); // strip "handle" or whatever the prefix is
70  _handlerHash[methodSignature] = i;
71  }
72  _initDone = true;
73  }
74  return _handlerHash;
75 }
76 
77 
78 void BasicHandler::handle(const QString &member, QGenericArgument val0,
79  QGenericArgument val1, QGenericArgument val2,
80  QGenericArgument val3, QGenericArgument val4,
81  QGenericArgument val5, QGenericArgument val6,
82  QGenericArgument val7, QGenericArgument val8)
83 {
84  // Now we try to find a handler for this message. BTW, I do love the Trolltech guys ;-)
85  // and now we even have a fast lookup! Thanks thiago!
86 
87  QString handler = member.toLower();
88  handler[0] = handler[0].toUpper();
89 
90  if (!handlerHash().contains(handler)) {
91  if (_defaultHandler == -1) {
92  qWarning() << QString("No such Handler: %1::%2%3").arg(metaObject()->className(), _methodPrefix, handler);
93  return;
94  }
95  else {
96  void *param[] = { 0, Q_ARG(QString, member).data(), val0.data(), val1.data(), val2.data(), val3.data(), val4.data(),
97  val5.data(), val6.data(), val7.data(), val8.data(), val8.data() };
98  qt_metacall(QMetaObject::InvokeMetaMethod, _defaultHandler, param);
99  return;
100  }
101  }
102 
103  void *param[] = { 0, val0.data(), val1.data(), val2.data(), val3.data(), val4.data(),
104  val5.data(), val6.data(), val7.data(), val8.data(), val8.data(), 0 };
105  qt_metacall(QMetaObject::InvokeMetaMethod, handlerHash()[handler], param);
106 }