QAxAggregated man page on Peanut

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QAxAggregated(3qt)					    QAxAggregated(3qt)

NAME
       QAxAggregated - Abstract base class for implementations of additional
       COM interfaces

SYNOPSIS
       This class is part of the Qt ActiveQt Extension.

       #include <qaxbindable.h>

   Public Members
       virtual long queryInterface ( const QUuid & iid, void ** iface ) = 0

   Protected Members
       IUnknown * controllingUnknown () const
       QWidget * widget () const
       QObject * object () const

DESCRIPTION
       This class is defined in the Qt ActiveQt Extension, which can be found
       in the qt/extensions directory. It is not included in the main Qt API.

       The QAxAggregated class is an abstract base class for implementations
       of additional COM interfaces.

       Create a subclass of QAxAggregated and reimplement queryInterface() to
       support additional COM interfaces. Use multiple inheritance from those
       COM interfaces. Implement the IUnknown interface of those COM
       interfaces by delegating the calls to QueryInterface(), AddRef() and
       Release() to the interface provided by controllingUnknown().

       Use the widget() method if you need to make calls to the QWidget
       implementing the ActiveX control. You must not store that pointer in
       your subclass (unless you use QGuardedPtr), as the QWidget can be
       destroyed by the ActiveQt framework at any time.

MEMBER FUNCTION DOCUMENTATION
IUnknown * QAxAggregated::controllingUnknown () const [protected]
       Returns the IUnknown interface of the ActiveX control. Implement the
       IUnknown interface in your QAxAggregated subclass to delegate calls to
       QueryInterface(), AddRef() and Release() to the interface provided by
       this function.

	   HRESULT AxImpl::QueryInterface( REFIID iid, void **iface )
	   {
	       return controllingUnknown()->QueryInterface( iid, iface );
	   }
	   unsigned long AxImpl::AddRef()
	   {
	       return controllingUnknown()->AddRef();
	   }
	   unsigned long AxImpl::Release()
	   {
	       return controllingUnknown()->Release();
	   }

       The QAXAGG_IUNKNOWN macro expands to the code above, and you can use it
       in the class declaration of your subclass.

QObject * QAxAggregated::object () const [protected]
       Returns a pointer to the QObject subclass implementing the COM object.
       This function might return 0.

       Warning: You must not store the returned pointer, unless you use a
       QGuardedPtr, since the QObject can be destroyed by ActiveQt at any
       time.

long QAxAggregated::queryInterface ( const QUuid & iid, void ** iface ) [pure
       virtual]
       Reimplement this pure virtual function to support additional COM
       interfaces. Set the value of iface to point to this object to support
       the interface iid. Note that you must cast the this pointer to the
       appropriate superclass.

	   long AxImpl::queryInterface( const QUuid &iid, void **iface )
	   {
	       *iface = 0;
	       if ( iid == IID_ISomeCOMInterface )
		   *iface = (ISomeCOMInterface*)this;
	       else
		   return E_NOINTERFACE;
	       AddRef();
	       return S_OK;
	   }

       Return the standard COM results S_OK (interface is supported) or
       E_NOINTERFACE (requested interface is not supported).

       Warning: Even though you must implement the IUnknown interface if you
       implement any COM interface you must not support the IUnknown interface
       in your queryInterface() implementation.

QWidget * QAxAggregated::widget () const [protected]
       Returns a pointer to the QWidget subclass implementing the ActiveX
       control. This function might return 0.

       Warning: You must not store the returned pointer, unless you use a
       QGuardedPtr, since the QWidget can be destroyed by ActiveQt at any
       time.

SEE ALSO
       http://doc.trolltech.com/qaxaggregated.html
       http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
       license file included in the distribution for a complete license
       statement.

AUTHOR
       Generated automatically from the source code.

BUGS
       If you find a bug in Qt, please report it as described in
       http://doc.trolltech.com/bughowto.html.	Good bug reports help us to
       help you. Thank you.

       The definitive Qt documentation is provided in HTML format; it is
       located at $QTDIR/doc/html and can be read using Qt Assistant or with a
       web browser. This man page is provided as a convenience for those users
       who prefer man pages, although this format is not officially supported
       by Trolltech.

       If you find errors in this manual page, please report them to qt-
       bugs@trolltech.com.  Please include the name of the manual page
       (qaxaggregated.3qt) and the Qt version (3.3.8).

Trolltech AS			2 February 2007		    QAxAggregated(3qt)
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