src/testlib/qsignalspy.h

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  41
  42 #ifndef QSIGNALSPY_H
  43 #define QSIGNALSPY_H
  44
  45 #include <QtCore/qbytearray.h>
  46 #include <QtCore/qlist.h>
  47 #include <QtCore/qobject.h>
  48 #include <QtCore/qmetaobject.h>
  49 #include <QtCore/qvariant.h>
  50
  51 QT_BEGIN_HEADER
  52
  53 QT_BEGIN_NAMESPACE
  54
  55 QT_MODULE(Test)
  56
  57 class QVariant;
  58
  59 /* ### Qt5: change the class to use regular BC mechanisms, such that we can
  60  * implement things like suggested in task 160192. */
  61 class QSignalSpy: public QObject, public QList<QList<QVariant> >
  62 {
  63 public:
  64     QSignalSpy(QObject *obj, const char *aSignal)
  65     {
  66 #ifdef Q_CC_BOR
  67         const int memberOffset = QObject::staticMetaObject.methodCount();
  68 #else
  69         static const int memberOffset = QObject::staticMetaObject.methodCount();
  70 #endif
  71         Q_ASSERT(obj);
  72         Q_ASSERT(aSignal);
  73
  74         if (((aSignal[0] - '0') & 0x03) != QSIGNAL_CODE) {
  75             qWarning("QSignalSpy: Not a valid signal, use the SIGNAL macro");
  76             return;
  77         }
  78
  79         QByteArray ba = QMetaObject::normalizedSignature(aSignal + 1);
  80         const QMetaObject *mo = obj->metaObject();
  81         int sigIndex = mo->indexOfMethod(ba.constData());
  82         if (sigIndex < 0) {
  83             qWarning("QSignalSpy: No such signal: '%s'", ba.constData());
  84             return;
  85         }
  86
  87         if (!QMetaObject::connect(obj, sigIndex, this, memberOffset,
  88                     Qt::DirectConnection, 0)) {
  89             qWarning("QSignalSpy: QMetaObject::connect returned false. Unable to connect.");
  90             return;
  91         }
  92         sig = ba;
  93         initArgs(mo->method(sigIndex));
  94     }
  95
  96     inline bool isValid() const { return !sig.isEmpty(); }
  97     inline QByteArray signal() const { return sig; }
  98
  99
 100     int qt_metacall(QMetaObject::Call call, int methodId, void **a)
 101     {
 102         methodId = QObject::qt_metacall(call, methodId, a);
 103         if (methodId < 0)
 104             return methodId;
 105
 106         if (call == QMetaObject::InvokeMetaMethod) {
 107             if (methodId == 0) {
 108                 appendArgs(a);
 109             }
 110             --methodId;
 111         }
 112         return methodId;
 113     }
 114
 115 private:
 116     void initArgs(const QMetaMethod &member)
 117     {
 118         QList<QByteArray> params = member.parameterTypes();
 119         for (int i = 0; i < params.count(); ++i) {
 120             int tp = QMetaType::type(params.at(i).constData());
 121             if (tp == QMetaType::Void)
 122                 qWarning("Don't know how to handle '%s', use qRegisterMetaType to register it.",
 123                          params.at(i).constData());
 124             args << tp;
 125         }
 126     }
 127
 128     void appendArgs(void **a)
 129     {
 130         QList<QVariant> list;
 131         for (int i = 0; i < args.count(); ++i) {
 132             QMetaType::Type type = static_cast<QMetaType::Type>(args.at(i));
 133             list << QVariant(type, a[i + 1]);
 134         }
 135         append(list);
 136     }
 137
 138     // the full, normalized signal name
 139     QByteArray sig;
 140     // holds the QMetaType types for the argument list of the signal
 141     QList<int> args;
 142 };
 143
 144 QT_END_NAMESPACE
 145
 146 QT_END_HEADER
 147
 148 #endif