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c++qtblackberry-10cascadeqvariant

How can I cast a QVariant to custom class?

I'm developing a BlackBerry 10 mobile application using the Momentics IDE (native SDK).

I have a listview which I want to handle its items click with C++ (I need to use C++ not QML).

I can get the index path using the "connect" instruction, but I have problem with parsing a QVariant to a custom class ;

Q_ASSERT(QObject::connect(list1, SIGNAL(triggered(QVariantList)), this, SLOT(openSheet(QVariantList))));

QVariant selectItem = m_categoriesListDataModel->data(indexPath);

I tried to use the static cast like below 

Category* custType = static_cast<Category*>(selectItem);

but it returns :

"invalid static_cast from type 'QVariant' to type 'Category*'"

Can anyone help me on this ?

Solution

  • You could try using qvariant_cast and qobject_cast.

    QObject *object = qvariant_cast<QObject*>(selectItem);
Category *category = qobject_cast<Category*>(object);

    Also, never put any persistent statement into Q_ASSERT. It will not be used when the assert is not enabled.