Get values from nested properties

ttuna

I'm trying to read values from nested properties:

// root class ...
class TestRootClass : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
    Q_PROPERTY(TestPropertyObject test READ test WRITE setTest NOTIFY testChanged)
...
}

// class of property in root class
class TestPropertyObject
{
    Q_GADGET
    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(int count READ count WRITE setCount)
...
}

I want to read Q_PROPERTY values from any arbitrary object but taking into account the property-hierarchy as far as possible and got this far:

QMap(
	("applicationName", QVariant(QString, "applicationName"))
	("applicationVersion", QVariant(QString, "applicationVersion"))
	("objectName", QVariant(QString, "objectName"))
	("organizationDomain", QVariant(QString, "organizationDomain"))
	("organizationName", QVariant(QString, "organizationName"))
	("quitLockEnabled", QVariant(QString, "quitLockEnabled"))
	("name", QVariant(QString, "name"))
	("test", QVariant(QVariantMap, QMap(
		("count", QVariant(QString, "count"))
		("name", QVariant(QString, "name"))
	)))
)

The problem is that this QMap is based on staticMetaObject informations and therefor there are no values available.

Any idea how i can retrieve the values of these nested properties?

BR

? Offline

Hi! I'm not sure what you want to achieve. You can retrieve every QObject's attached QMetaObject with

QObject *obj = new TestRootClass;
QMetaObject *mo = obj->metaObject();

You can now access all its properties (with property(index)) and then read the value of this property from your actual object (.read(obj)).


for (int i = mo->propertyOffset(); i < mo->propertyCount(); ++i) {
    QVariant tmp = mo->property(i).read(obj);
    qDebug() << tmp;
}

Hope it helps!

ttuna

Thanks for your reply.
The problem is that i can't get a proper object from a property (- just QVariant or void*).
So how can i access the MetaObject of this property object?