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39
40#include "propertychangehandler_p.h"
41
42QT_BEGIN_NAMESPACE
43
44namespace Qt3DCore {
45
46/*
47 \internal
48 \class Qt3DCore::PropertyChangeHandlerBase
49 \inmodule Qt3DCore
50 \brief Base class for the property change handler.
51*/
52PropertyChangeHandlerBase::PropertyChangeHandlerBase(QObject *parent) :
53 QObject(parent)
54{
55}
56
57void PropertyChangeHandlerBase::connectToPropertyChange(const QObject *object, int propertyIndex)
58{
59 const QMetaObject *metaObject = object->metaObject();
60 const QMetaProperty property = metaObject->property(index: propertyIndex);
61 if (!property.hasNotifySignal())
62 return;
63
64 static const int memberOffset = staticMetaObject.methodCount();
65 QMetaObject::Connection connection = QMetaObject::connect(sender: object, signal_index: property.notifySignalIndex(),
66 receiver: this, method_index: memberOffset + propertyIndex,
67 type: Qt::DirectConnection, types: 0);
68 Q_ASSERT(connection);
69 Q_UNUSED(connection);
70}
71
72void PropertyChangeHandlerBase::disconnectFromPropertyChange(const QObject *object, int propertyIndex)
73{
74 const QMetaObject *metaObject = object->metaObject();
75 const QMetaProperty property = metaObject->property(index: propertyIndex);
76 if (!property.hasNotifySignal())
77 return;
78
79 static const int memberOffset = staticMetaObject.methodCount();
80 QMetaObject::disconnect(sender: object, signal_index: property.notifySignalIndex(), receiver: this, method_index: memberOffset + propertyIndex);
81}
82
83
84}
85
86QT_END_NAMESPACE
87

source code of qt3d/src/core/nodes/propertychangehandler.cpp