ADC 400F Handbuch PDF herunterladen (Seite 23)

Chapter 2. Setting up the software

class CAnalyzer; // ➍

class CBufferDecoder;

class CEvent;

class MyEventProcessor : public CEventProcessor // ➎

{

private:

CTreeParameterArray& m_rawData; // ➏

int m_nId; // ➐

int m_nSlot; // ➑

public:

MyEventProcessor(int ourId,

int ourSlot, // ➒

const char* baseParameterName);

~MyEventProcessor(); // (10)

virtual Bool_t operator()(const Address_t pEvent,

CEvent& rEvent, // (11)

CAnalyzer& rAnalyzer,

CBufferDecoder& rDecoder);

private:

void unpackPacket(TranslatorPointer<UShort_t> p); // (12)

};

#endif

The numbers in the discussion below refer to the numbers in the example above.

Ê All event processors must be derived from the base class CEventProcessor. To do this requires

that we include the header for that class.

Ë The TranslatorPointer class creates pointer-like objects that will do any byte order

transformations required between the system that created the event ﬁles and the system running

SpecTcl. This class is a template class, therefore it is necessary to include the header for it as one of

the parameters to a member function of ours is a TranslatorPointer<UShort_t>.

Ì The histotypes.h header deﬁnes types that insulate SpecTcl from differences in the data types in

each system. We use these extensively in the header and therefore must include the header here.

Í Where the compiler does not need to know the internal deﬁnitions of a class in a header it is a good

idea to create forward references to those classes. This can be done when all objects of a class are

pointers or references. Doing this decreases the likelyhood that we wind up with a system that has

circular include references.

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ADC 400F Handbuch Seite 23