library: libTree
#include "TEventList.h"


class description - source file - inheritance tree (.pdf)

class TEventList : public TNamed

Inheritance Chart:

TEventList() TEventList(const char* name, const char* title = "", Int_t initsize = 0, Int_t delta = 0) TEventList(const TEventList& list) virtual ~TEventList() virtual void Add(const TEventList* list) static TClass* Class() virtual void Clear(Option_t* option = "") virtual Bool_t Contains(Long64_t entry) virtual void Enter(Long64_t entry) TDirectory* GetDirectory() const virtual Long64_t GetEntry(Int_t index) const virtual Int_t GetIndex(Long64_t entry) const virtual Long64_t* GetList() const virtual Int_t GetN() const virtual Bool_t GetReapplyCut() const virtual Int_t GetSize() const virtual void Intersect(const TEventList* list) virtual TClass* IsA() const virtual Int_t Merge(TCollection* list) TEventList& operator=(const TEventList& list) virtual void Print(Option_t* option = "") const virtual void Reset(Option_t* option = "") virtual void Resize(Int_t delta = 0) virtual void SetDelta(Int_t delta = 100) virtual void SetDirectory(TDirectory* dir) virtual void SetName(const char* name) virtual void SetReapplyCut(Bool_t apply = kFALSE) virtual void ShowMembers(TMemberInspector& insp, char* parent) virtual void Sort() virtual void Streamer(TBuffer& b) void StreamerNVirtual(TBuffer& b) virtual void Subtract(const TEventList* list)

Data Members

Int_t fN Number of elements in the list Int_t fSize Size of array Int_t fDelta Increment size Bool_t fReapply If true, TTree::Draw will 'reapply' the original cut Long64_t* fList [fN]Array of elements TDirectory* fDirectory ! Pointer to directory holding this tree

Class Description

 A TEventList object is a list of selected events (entries) in a TTree
 A TEventList is automatically generated by TTree::Draw: example      
      tree->Draw(">>elist1","x<0 && y> 0");                           
         In this example, a TEventList object named "elist1" will be  
         generated. (Previous contents are overwritten).              
      tree->Draw(">>+elist1","x<0 && y> 0");                          
         In this example, selected entries are added to the list.     
 The TEventList object is added to the list of objects in the current 
 Use TTree:SetEventList(TEventList *list) to inform TTree that you    
 want to use the list as input. The following code gets a pointer to  
 the TEventList object created in the above commands:                 
     TEventList *list = (TEventList*)gDirectory->Get("elist1");       
 Use function Enter to enter an element in the list                   
 The function Add may be used to merge two lists.                     
 The function Subtract may be used to subtract two lists.             
 The function Reset may be used to reset a list.                      
 Use TEventList::Print(option) to print the contents.                 
      (option "all" prints all the list entries).                     
   Operators + and - correspond to functions Add and Subtract.        
 A TEventList object can be saved on a file via the Write function.   

TEventList(): TNamed()
*-*-*-*-*-*Default constructor for a EventList*-*-*-*-*-*-*-*-*-*-*-*-*
*-*        ==================================

TEventList(const char *name, const char *title, Int_t initsize, Int_t delta) :TNamed(name,title), fReapply(kFALSE)
*-*-*-*-*-*-*-*-*-*-*-*-*Create a EventList*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                      =================

  This Eventlist is added to the list of objects in current directory

TEventList(const TEventList &list) : TNamed(list)
*-*-*-*-*-*-*-*-*-*-*-*-*Copy constructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ================

*-*-*-*-*-*Default destructor for a EventList*-*-*-*-*-*-*-*-*-*-*-*
*-*        =================================

void Add(const TEventList *alist)
          Merge contents of alist with this list.
   Both alist and this list are assumed to be sorted prior to this call

Bool_t Contains(Long64_t entry)
          Return TRUE if list contains entry.

void Enter(Long64_t entry)
          Enter element entry into the list

Long64_t GetEntry(Int_t index) const
       Return value of entry at index in the list.
       Return -1 if index is not in the list range

Int_t GetIndex(Long64_t entry) const
 Return index in the list of element with value entry
 array is supposed  to be sorted prior to this call.
 If match is found, function returns position of element.
 If no match found, function returns -1.

void Intersect(const TEventList *alist)
 Remove elements from this list that are NOT present in alist.

Int_t Merge(TCollection *list)
 Merge entries in all the TEventList in the collection in this event list

void Print(Option_t *option) const
          Print contents of this list

void Reset(Option_t *)
          Reset number of entries in event list

void Resize(Int_t delta)
          Resize list by delta entries

void SetDirectory(TDirectory *dir)
 Remove reference to this EventList from current directory and add
 reference to new directory dir. dir can be 0 in which case the list
 does not belong to any directory.

void SetName(const char *name)
 Change the name of this TEventList

void Sort()
          Sort list entries in increasing order

void Streamer(TBuffer &b)
 Stream an object of class TEventList.

void Subtract(const TEventList *alist)
 Remove elements from this list that are present in alist.

Inline Functions

               void Clear(Option_t* option = "")
        TDirectory* GetDirectory() const
          Long64_t* GetList() const
              Int_t GetN() const
             Bool_t GetReapplyCut() const
              Int_t GetSize() const
               void SetDelta(Int_t delta = 100)
               void SetReapplyCut(Bool_t apply = kFALSE)
        TEventList& operator=(const TEventList& list)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void StreamerNVirtual(TBuffer& b)

Author: Rene Brun 11/02/97
Last update: root/tree:$Name: $:$Id: TEventList.cxx,v 1.13 2005/06/03 07:37:06 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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