class TFriendElement: public TNamed


TFriendElement

A TFriendElement TF describes a TTree object TF in a file.
When a TFriendElement TF is added to the the list of friends of an
existing TTree T, any variable from TF can be referenced in a query
to T.

To add a TFriendElement to an existing TTree T, do:
T.AddFriend("friendTreename","friendTreeFile");

See TTree::AddFriend for more information.

Function Members (Methods)

public:
TFriendElement()
TFriendElement(TTree* tree, const char* treename, const char* filename)
TFriendElement(TTree* tree, const char* treename, TFile* file)
TFriendElement(TTree* tree, TTree* friendtree, const char* alias)
virtual~TFriendElement()
voidTObject::AbstractMethod(const char* method) const
virtual voidTObject::AppendPad(Option_t* option = "")
virtual voidTObject::Browse(TBrowser* b)
static TClass*Class()
virtual const char*TObject::ClassName() const
virtual voidTNamed::Clear(Option_t* option = "")
virtual TObject*TNamed::Clone(const char* newname = "") const
virtual Int_tTNamed::Compare(const TObject* obj) const
virtual TTree*Connect()
virtual voidTNamed::Copy(TObject& named) const
virtual voidTObject::Delete(Option_t* option = "")MENU
virtual TTree*DisConnect()
virtual Int_tTObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual voidTObject::Draw(Option_t* option = "")
virtual voidTObject::DrawClass() constMENU
virtual TObject*TObject::DrawClone(Option_t* option = "") constMENU
virtual voidTObject::Dump() constMENU
virtual voidTObject::Error(const char* method, const char* msgfmt) const
virtual voidTObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual voidTObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual voidTObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual voidTObject::Fatal(const char* method, const char* msgfmt) const
virtual voidTNamed::FillBuffer(char*& buffer)
virtual TObject*TObject::FindObject(const char* name) const
virtual TObject*TObject::FindObject(const TObject* obj) const
virtual Option_t*TObject::GetDrawOption() const
static Long_tTObject::GetDtorOnly()
virtual TFile*GetFile()
virtual const char*TObject::GetIconName() const
virtual const char*TNamed::GetName() const
virtual char*TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_tTObject::GetObjectStat()
virtual Option_t*TObject::GetOption() const
virtual TTree*GetParentTree() const
virtual const char*TNamed::GetTitle() const
virtual TTree*GetTree()
virtual const char*GetTreeName() const
virtual UInt_tTObject::GetUniqueID() const
virtual Bool_tTObject::HandleTimer(TTimer* timer)
virtual ULong_tTNamed::Hash() const
virtual voidTObject::Info(const char* method, const char* msgfmt) const
virtual Bool_tTObject::InheritsFrom(const char* classname) const
virtual Bool_tTObject::InheritsFrom(const TClass* cl) const
virtual voidTObject::Inspect() constMENU
voidTObject::InvertBit(UInt_t f)
virtual TClass*IsA() const
virtual Bool_tTObject::IsEqual(const TObject* obj) const
virtual Bool_tTObject::IsFolder() const
Bool_tTObject::IsOnHeap() const
virtual Bool_tTNamed::IsSortable() const
Bool_tTObject::IsZombie() const
virtual voidls(Option_t* option = "") const
voidTObject::MayNotUse(const char* method) const
virtual Bool_tTObject::Notify()
static voidTObject::operator delete(void* ptr)
static voidTObject::operator delete(void* ptr, void* vp)
static voidTObject::operator delete[](void* ptr)
static voidTObject::operator delete[](void* ptr, void* vp)
void*TObject::operator new(size_t sz)
void*TObject::operator new(size_t sz, void* vp)
void*TObject::operator new[](size_t sz)
void*TObject::operator new[](size_t sz, void* vp)
virtual voidTObject::Paint(Option_t* option = "")
virtual voidTObject::Pop()
virtual voidTNamed::Print(Option_t* option = "") const
virtual Int_tTObject::Read(const char* name)
virtual voidTObject::RecursiveRemove(TObject* obj)
voidTObject::ResetBit(UInt_t f)
virtual voidTObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual voidTObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
voidTObject::SetBit(UInt_t f)
voidTObject::SetBit(UInt_t f, Bool_t set)
virtual voidTObject::SetDrawOption(Option_t* option = "")MENU
static voidTObject::SetDtorOnly(void* obj)
virtual voidTNamed::SetName(const char* name)MENU
virtual voidTNamed::SetNameTitle(const char* name, const char* title)
static voidTObject::SetObjectStat(Bool_t stat)
virtual voidTNamed::SetTitle(const char* title = "")MENU
virtual voidTObject::SetUniqueID(UInt_t uid)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual Int_tTNamed::Sizeof() const
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
virtual voidTObject::SysError(const char* method, const char* msgfmt) const
Bool_tTObject::TestBit(UInt_t f) const
Int_tTObject::TestBits(UInt_t f) const
virtual voidTObject::UseCurrentStyle()
virtual voidTObject::Warning(const char* method, const char* msgfmt) const
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_tTObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const
protected:
TFriendElement(const TFriendElement&)
virtual voidTObject::DoError(int level, const char* location, const char* fmt, va_list va) const
voidTObject::MakeZombie()
TFriendElement&operator=(const TFriendElement&)

Data Members

public:
enum { kFromChain
};
enum TObject::EStatusBits { kCanDelete
kMustCleanup
kObjInCanvas
kIsReferenced
kHasUUID
kCannotPick
kNoContextMenu
kInvalidObject
};
enum TObject::[unnamed] { kIsOnHeap
kNotDeleted
kZombie
kBitMask
kSingleKey
kOverwrite
kWriteDelete
};
protected:
TFile*fFile!pointer to the file containing the friend TTree
TStringTNamed::fNameobject identifier
Bool_tfOwnFiletrue if file is managed by this class
TTree*fParentTree!pointer to the parent TTree
TStringTNamed::fTitleobject title
TTree*fTree!pointer to the TTree described by this element
TStringfTreeNamename of the friend TTree

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

TFriendElement(const TFriendElement& )
Default constructor for a friend element*-*-*-*-*-*-*-
*-*        =======================================
TFriendElement(TTree *tree, const char *treename, const char *filename)
Create a friend element*-*-
*-*                      ======================

 If treename is of the form "a=b", an alias called "a" is created for
 treename = "b" by default the alias name is the name of the tree.
TFriendElement(TTree *tree, const char *treename, TFile *file)
Create a friend element*-*-
*-*                      ======================

 If treename is of the form "a=b", an alias called "a" is created for
 treename = "b" by default the alias name is the name of the tree.
 The passed TFile is managed by the user (i.e. user must delete the TFile).
TFriendElement(TTree *tree, TTree* friendtree, const char *alias)
 Create a friend element.
TFriendElement(const TFriendElement& )
 Copy constructor
TFriendElement& operator=(const TFriendElement& )
 Equal operator
~TFriendElement()
 Destructor.  Disconnect from the owning tree if needed.
TTree * Connect()
 Connect file and return TTree.
TTree * DisConnect()
 DisConnect file and TTree.
TFile * GetFile()
 Return pointer to TFile containing this friend TTree.
TTree * GetTree()
 Return pointer to friend TTree.
void ls(Option_t* option = "") const
 List this friend element.
TTree * GetParentTree()
{return fParentTree;}
const char * GetTreeName()
{return fTreeName.Data();}

Author: Rene Brun 07/04/2001
Last change: root/tree:$Id: TFriendElement.h 20882 2007-11-19 11:31:26Z rdm $
Last generated: 2008-08-06 08:06
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
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