C++ constructor and Qt

There is a statement in the foudations of Qt Development book that goes as follows:

MyClass::MyClass(const string& test, QObject *parent) : QObject( parent )

What is meant when we put开发者_JAVA百科 : QObject( parent )?

Thanks.

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Are you sure that there aren't two constructor declarations? The : QObject(parent) is an initializer list; it is initializing the base class QObject with the QObject::QObject(QObject*) constructor.

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In short this means that MyClass inherits properties (and methods) from QObject

http://www.cplusplus.com/doc/tutorial/inheritance/

http://www.anyexample.com/programming/cplusplus/cplusplus_inheritance_example.xml

So MyClass is a QObject

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When you create a QObject with another object as parent, it's added to the parent's children() list, and is deleted when the parent is.

Reference