[dev] how to get the slideshow animation' duration?

[Azreal Yang]

Hi,
        i want to get all slideshow animation duration,i write code in
startShowImpl() , this function is in
sd\source\ui\slideshow\slieshowimpl.cxx,and the code:
        int nPageCount = mpDoc->GetSdPageCount(PK_STANDARD);
                for (int i = 0; i < nPageCount; i++)
                {
                        double fSlideDuration;
                        SdPage* lpPage = mpDoc->GetSdPage(i, PK_STANDARD);

                        boost::shared_ptr< sd::MainSequence > pMainSequence =
lpPage->getMainSequence();
                        
            ::com::sun::star::uno::Reference<
::com::sun::star::container::XEnumerationAccess >
                    xEnumerationAccess( pMainSequence->getRootNode(),
                                        ::com::sun::star::uno::UNO_QUERY_THROW 
);
            ::com::sun::star::uno::Reference<
::com::sun::star::container::XEnumeration >
                    xEnumeration( xEnumerationAccess->createEnumeration(),
                                ::com::sun::star::uno::UNO_QUERY_THROW );
        
            while( xEnumeration->hasMoreElements() )
            {                   
                                double fDuration = 0.0;
                
                        ::com::sun::star::uno::Reference<
::com::sun::star::animations::XAnimationNode >
                                xChildNode( xEnumeration->nextElement(),
                                            
::com::sun::star::uno::UNO_QUERY_THROW );
                
                                // the fDuration always 0
                                fDuration = 
*(double*)(xChildNode->getDuration().getValue());
            }
                }
in the while loop,the fDuration is always 0,is there something that i
should change? thx!--
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