Extended attributes

TGrafBundle3D has a CreateBundleIterator function that returns a TGrafBundleIterator3D instance for iterating through the extended attributes of a TGrafBundle3D. Extended attributes are created with the TGrafAttribute class and adopted through the TGrafBundle3D::AdoptGrafAttribute function. Extending attributes is described in Chapter 11.

    virtual TGrafBundleIterator3D* CreateGrafBundleIterator();
The following code fragment shows how you might iterate through a bundle and orphan all of its extended attributes. An attribute retrieved through the iteration operation is stored as a TGrafAttribute instance so that you can orphan the attribute by calling the TGrafBundle3D::OrphanGrafAttribute function.

      TGrafBundle3D* bundle;
  TGrafBundleIterator3D* iterator = bundle>CreateGrafBundleIterator( TRUE );
  
  for( const TGrafAttribute* attrib = iterator>First(); attrib != NIL; 
                  attrib = ( TGrafAttribute* )iterator>Next() )
      bundle>OrphanGrafAttribute( attrib>GetName() );
  
  delete iterator;
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