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| 1 | #ifndef MARS_MFEventSelector | 
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| 2 | #define MARS_MFEventSelector | 
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| 3 |  | 
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| 4 | #ifndef MARS_MFilter | 
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| 5 | #include "MFilter.h" | 
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| 6 | #endif | 
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| 7 |  | 
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| 8 | class MParList; | 
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| 9 |  | 
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| 10 | class MFEventSelector : public MFilter | 
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| 11 | { | 
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| 12 | private: | 
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| 13 | Int_t   fNumTotalEvts;    // Number of total events from which are selected | 
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| 14 | Int_t   fNumSelectEvts;   // Number of events to be selected | 
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| 15 | Float_t fSelRatio;        // Selection Probability | 
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| 16 |  | 
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| 17 | Int_t   fNumSelectedEvts; //! Number of events which have been selected | 
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| 18 |  | 
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| 19 | Bool_t  fResult;          //! Reseult of a single selection | 
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| 20 |  | 
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| 21 | void StreamPrimitive(ofstream &out) const; | 
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| 22 |  | 
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| 23 | Int_t PreProcess(MParList *pList); | 
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| 24 | Int_t Process(); | 
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| 25 | Int_t PostProcess(); | 
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| 26 |  | 
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| 27 | enum { kNumTotalFromFile = BIT(14) }; | 
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| 28 |  | 
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| 29 | public: | 
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| 30 | MFEventSelector(const char *name=NULL, const char *title=NULL); | 
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| 31 |  | 
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| 32 | Bool_t IsExpressionTrue() const { return fResult; } | 
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| 33 |  | 
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| 34 | void SetNumTotalEvts(Int_t n)  { fNumTotalEvts = n; ResetBit(kNumTotalFromFile); } | 
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| 35 | void SetNumSelectEvts(Int_t n) { fNumSelectEvts = n; } | 
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| 36 | void SetSelectionRatio(Float_t f); | 
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| 37 |  | 
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| 38 | ClassDef(MFEventSelector, 0) // A filter to do a random selection of events | 
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| 39 | }; | 
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| 40 |  | 
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| 41 | #endif | 
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