Go4DynamicList
Class TGo4TreeHistogramEntry

class TGo4TreeHistogramEntry

derived from TGo4DynamicEntry

Dynamic list entry which links a histogram to a certain tree.
Method Process performs a single event TTree::Draw on this
tree and directs the output to the histogram. String Parameters
Varexp and Selection of Draw() are stored in the entry and are
used for each Draw. This dynamic list entry does _not_ use
the Go4 Conditions and event index scheme!

Author:

J. Adamczewski

Since: 1/2001

Fields inherited from class TNamed

fName, fTitle

Constructor Summary

TGo4TreeHistogramEntry()           default ctor for streamer.

TGo4TreeHistogramEntry(const Text_t* histogramname, TTree* tree, const Text_t* varexp, const TCut& cut)

TGo4TreeHistogramEntry(const Text_t* histogramname, const Text_t* treename, const Text_t* varexp, const TCut& cut)

Destructor Summary
virtual synchronized	~TGo4TreeHistogramEntry()

Method Summary
TGo4DynamicEntryStatus*	CreateStatus()           Create a status object containing information such as the object names.
Int_t	Process()           Process the dynamic entry.
Int_t	ProcessTree(Int_t times)           Process the last "times" events in the tree.
virtual void	Reset()           Resets this entry to an initial status.
virtual void	SetStatus(TGo4DynamicEntryStatus* state)           Set this dynamic entry to the values of status object state.
private void	UpdateStatus(TGo4DynamicEntryStatus* state)           method needed by method CreateStatus of any status subclasses to set the values of the clienttask specific part of the status object.

Methods inherited from interface Go4DynamicList.TGo4DynamicEntry

CleanupCondition, CleanupEvent, CleanupHistogram, EnableProcessing, FindDataMember, InitPointers, Membersize, SetConditionName, SetConEventName, SetConVarName, TestCondition

Methods inherited from class TNamed

operator=, Clear, Clone, Compare, Copy, FillBuffer, GetName, GetTitle, Hash, IsSortable, SetName, SetNameTitle, SetTitle, ls, Print, Sizeof, Class, Class_Name, Class_Version, Dictionary, IsA, ShowMembers, Streamer, StreamerNVirtual, DeclFileName, ImplFileLine, ImplFileName, DeclFileLine

Field Detail

fbNewHistogram

private Bool_t fbNewHistogram

True before Process is called the first time. Then the histogram
created by the TTree::Draw is added to the histogram folder once.

public const static const Text_t[] fgcENTRYSUF

suffix for entryname to differ from histogram name

private Int_t fiLastEvent

index of last tree entry of the previous Process() call

private TString fxDrawexp

The complete TTree:Draw() expression, i.e. varexp>>+histogram

private TString fxHistogramName

The target histogram name to be filled

private TCut fxSelection

The selection string needed by TTree:Draw()

private TTree* fxTree

Tree which is used to fill this histogram.

private TString fxTreeName

The Treename to find the tree

private TString fxVarexp

The varexp string needed by TTree:Draw()

public TGo4TreeHistogramEntry()

default ctor for streamer.

public TGo4TreeHistogramEntry(const Text_t* histogramname, TTree* tree, const Text_t* varexp, const TCut& cut)

public TGo4TreeHistogramEntry(const Text_t* histogramname, const Text_t* treename, const Text_t* varexp, const TCut& cut)

public virtual synchronized ~TGo4TreeHistogramEntry()

public TGo4DynamicEntryStatus* CreateStatus()

Create a status object containing information such as the object names.
Can be sent to the Display to show the existing objects and their relations.
Memento mechanism is _not_ provided here, since we would not change
the object names afterwards.

public Int_t Process()

Process the dynamic entry.

public Int_t ProcessTree(Int_t times)

Process the last "times" events in the tree.

public virtual void Reset()

Resets this entry to an initial status.

public virtual void SetStatus(TGo4DynamicEntryStatus* state)

Set this dynamic entry to the values of status object state.

private void UpdateStatus(TGo4DynamicEntryStatus* state)

method needed by method
CreateStatus of any status subclasses to
set the values of the clienttask specific
part of the status object.

Association Links

to Class TCut

The selection string needed by TTree:Draw()