class TTreeTableInterface: public TVirtualTableInterface


TTreeTableInterface.

TTreeTableInterface is used to interface to data that is stored in a
TTree. When the interface is created, an expression can be
specified. This expression will define the columns to be shown.

A selection criterium can also be specified. A TEntryList will be
created and applied to the TTree using this criterium.
a new TEntryList to use can be specified using SetEntryList.
TGTable->Update() will need to be called to show the effects.

WARNING: Do not apply an entrylist to the tree in any other way than
through the interface, this will have undefined consequences.

Columns can be manipulated using the appropriate methods. A
TGTable->Update is always needed afterwards to make the table aware
of the changes.

Function Members (Methods)

public:

	TTreeTableInterface(const TTreeTableInterface&)
	TTreeTableInterface(TTree* tree = 0, const char* varexp = 0, const char* selection = 0, Option_t* option = 0, Long64_t nentries = 0, Long64_t firstentry = 0)
virtual	~TTreeTableInterface()
virtual void	AddColumn(const char* expression, UInt_t position)
virtual void	AddColumn(TTreeFormula* formula, UInt_t position)
static TClass*	Class()
virtual const char*	GetColumnHeader(UInt_t column)
virtual TEntryList*	GetEntryList()
virtual UInt_t	GetNColumns()
virtual UInt_t	GetNRows()
virtual const char*	GetRowHeader(UInt_t row)
virtual Double_t	GetValue(UInt_t row, UInt_t column)
virtual const char*	GetValueAsString(UInt_t row, UInt_t column)
virtual TClass*	IsA() const
TTreeTableInterface&	operator=(const TTreeTableInterface&)
virtual void	RemoveColumn(UInt_t position)
virtual void	SetEntryList(TEntryList* entrylist = 0)
virtual void	SetFormula(TTreeFormula* formula, UInt_t position)
virtual void	SetSelection(const char* selection)
virtual void	ShowMembers(TMemberInspector&)
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)

private:

void	InitEntries()
void	SetVariablesExpression(const char* varexp)
void	SyncFormulas()

Data Members

private:

TEntryList*	fEntries	Currently active entries
Long64_t	fEntry	Present entry number in fTree.
Long64_t	fFirstEntry	First entry.
Bool_t	fForceDim	Force dimension.
TList*	fFormulas	Array of TTreeFormulas to display values
TList*	fInput	Used for fSelector.
TTreeFormulaManager*	fManager	Coordinator for the formulas.
UInt_t	fNColumns	Amount of columns in the data
Long64_t	fNEntries	Number of entries in the tree.
UInt_t	fNRows	Amount of rows in the data
TTreeFormula*	fSelect	Selection condition
TSelectorDraw*	fSelector	Selector
TTree*	fTree	Data in a TTree

Class Charts

Inheritance Inherited Members Includes Libraries

Function documentation

TTreeTableInterface(TTree* tree = 0, const char* varexp = 0, const char* selection = 0, Option_t* option = 0, Long64_t nentries = 0, Long64_t firstentry = 0)

 TTreeTableInterface constructor.

~TTreeTableInterface()

 TTreeTableInterface destructor.

void SetVariablesExpression(const char* varexp)

 Compile the variables expression from the given varexp.

void SetSelection(const char* selection)

 Set the selection expression.

void SyncFormulas()

 Sync the formulas using the TTreeFormulaManager.

void InitEntries()

 Initialise the TEntryList with the entries that match the
 selection criterium.

Double_t GetValue(UInt_t row, UInt_t column)

 Return the value of row,column. If the position does not exist
 or does not contain a number, 0 is returned.

const char * GetValueAsString(UInt_t row, UInt_t column)

 Return the content of row,column as string to use in a
 TGTableCell label.

const char * GetRowHeader(UInt_t row)

 Return a string to use as a label for rowheader at column.

const char * GetColumnHeader(UInt_t column)

 Return a string to use as a label for columnheader at column.

UInt_t GetNColumns()

 Return the amount of column available.

UInt_t GetNRows()

 Return the amount of rows in the Tree.

void AddColumn(const char* expression, UInt_t position)

 Add column according ot expression at position,
 TGTable->Update() is needed afterwards to apply the change to
 the TGTable.

void AddColumn(TTreeFormula* formula, UInt_t position)

 Add column with formula at position, TGTable->Update() is needed
 afterwards to apply the change to the TGTable.

void RemoveColumn(UInt_t position)

 Remove column at position, TGTable->Update() is needed
 afterwards to apply the change to the TGTable.

void SetFormula(TTreeFormula* formula, UInt_t position)

 Set the TTreeFormula of position to formula.

void SetEntryList(TEntryList* entrylist = 0)

 Set the currently active entrylist.

TTreeTableInterface(TTree* tree = 0, const char* varexp = 0, const char* selection = 0, Option_t* option = 0, Long64_t nentries = 0, Long64_t firstentry = 0)

TEntryList * GetEntryList()

{ return fEntries; }