How to access root context property from instantiated C++ QObject

[don@thegagnes.com]

On the C++ side I do this:

rootContext()->setContextProperty("foo", fooObject);

rootContext()->setContextProperty("foo", fooObject);

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Then in Qml I do this:

Item {
   MyCPlusPlusObject { }
   Text {
      text: foo.someTextProperty
   }
}

Item {
   MyCPlusPlusObject { }
   Text {
      text: foo.someTextProperty
   }
}

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Where MyCPlusPlusObject is a simple QObject based C++ object that is registered with qmlRegisterType. The question is how can I get a hold of the "foo" context property from inside the implementation of MyCPlusPlusObject. I need to somehow get a hold of the root context to get the property out of it.