How can i dynamically instantiate a class using the class name?

Charles.qt

I would like to instantiate a class dynamically,
In java, Class.forName(String className) is used for instantiate the class dynamically.
I searched on Google for Qt, something called QMetaObject ,QmetaType,etc is available ,
using these classses i can instantiate the class dynamically.
But i am not clear enough, how to implement this?

Please someone can explain me or give me some examples ,that would be useful for me to understand this concept clearly.

giesbert

Have a look at the "documentation of QMetaObject":http://qt-project.org/doc/qt-4.8/qmetatype.html

[quote]
...
It associates a type name to a type so that it can be created and destructed dynamically at run-time. Declare new types with Q_DECLARE_METATYPE() to make them available to QVariant and other template-based functions. Call qRegisterMetaType() to make type available to non-template based functions, such as the queued signal and slot connections.

Any class or struct that has a public default constructor, a public copy constructor, and a public destructor can be registered.

The following code allocates and destructs an instance of MyClass:

@
int id = QMetaType::type("MyClass");
if (id != 0) {
void *myClassPtr = QMetaType::construct(id);
...
QMetaType::destroy(id, myClassPtr);
myClassPtr = 0;
}
@
[/quote]

Charles.qt

Thankyou Gerolf..

Anticross

What about Qt 5.3 ? It doesn't work there. :(

Jeroentjehome

It should work, did you read the updated docs:
"QMetaType":http://qt-project.org/doc/qt-5/qmetatype.html
What code does not work for you??