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Reference Guide
TVirtualBranchBrowsable Class Reference

TVirtualBranchBrowsable is a base class (not really abstract, but useless by itself) for helper objects that extend TBranch's browsing support. Each registered derived class's generator method is called, which fills all created helper objects into a list which can then be browsed. For details of what these browser helper objects can do, see e.g. TMethodBrowsable, which allows methods to show up in the TBrowser.

Only registered helper objects are created. By default, only TMethodBrowsable, TNonSplitBrowsable, and TCollectionPropertyBrowsable are registered (see RegisterDefaultGenerators). You can prevent any of their objects to show up in the browser by unregistering the generator:

will stop creating browsable method helper objects from that call on. Note that these helper objects are cached (in TBranch::fBrowsables); already created (and thus cached) browsables will still appear in the browser even after unregistering the corresponding generator.

You can implement your own browsable objects and thier generator; see e.g. the simple TCollectionPropertyBrowsable. Note that you will have to register your generator just like any other, and that you should implement the following methods for your own class, mainly for consistency reasons:

static void Register() {
static void Unregister() {

where GetBrowsables is a static member function of your class, that creates the browsable helper objects, and has the signature

static Int_t GetBrowsables(TList& list, const TBranch* branch,
const TVirtualBranchBrowsable* parent=0);

It has to return the number of browsable helper objects for parent (or, if NULL, for branch) which are added to the list.

Definition at line 29 of file TBranchBrowsable.h.

Public Types

typedef Int_t(* MethodCreateListOfBrowsables_t) (TList &, const TBranch *branch, const TVirtualBranchBrowsable *parent)
 
- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kInconsistent = 0x08000000,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0), kMustCleanup = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5),
  kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13)
}
 

Public Member Functions

 ~TVirtualBranchBrowsable ()
 Destructor. Delete our leaves. More...
 
void Browse (TBrowser *b)
 Calls TTree::Draw on the method if return type is not a class; otherwise expands returned object's "folder". More...
 
const TBranchGetBranch () const
 
TClassGetClassType () const
 
const char * GetIconName () const
 Returns mime type name of object. More...
 
TListGetLeaves () const
 Return list of leaves. If not set up yet we'll create them. More...
 
const TVirtualBranchBrowsableGetParent () const
 
void GetScope (TString &scope) const
 Returns the full name for TTree::Draw to draw *this. More...
 
Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
Bool_t TypeIsPointer () const
 
- Public Member Functions inherited from TNamed
 TNamed ()
 
 TNamed (const char *name, const char *title)
 
 TNamed (const TNamed &named)
 TNamed copy ctor. More...
 
 TNamed (const TString &name, const TString &title)
 
virtual ~TNamed ()
 TNamed destructor. More...
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings (""). More...
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare two TNamed objects. More...
 
virtual void Copy (TObject &named) const
 Copy this to obj. More...
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual ULong_t Hash () const
 Return hash value for this object. More...
 
virtual Bool_t IsSortable () const
 
virtual void ls (Option_t *option="") const
 List TNamed name and title. More...
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator. More...
 
virtual void Print (Option_t *option="") const
 Print TNamed name and title. More...
 
virtual void SetName (const char *name)
 Set the name of the TNamed. More...
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title). More...
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed. More...
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
ULong_t CheckedHash ()
 Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Delete (Option_t *option="")
 Delete this object. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
Bool_t HasInconsistentHash () const
 Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
void MayNotUse (const char *method) const
 Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". More...
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. More...
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object. More...
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id. More...
 
virtual void SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
R__ALWAYS_INLINE Bool_t TestBit (UInt_t f) const
 
Int_t TestBits (UInt_t f) const
 
virtual void UseCurrentStyle ()
 Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory. More...
 

Static Public Member Functions

static Int_t FillListOfBrowsables (TList &list, const TBranch *branch, const TVirtualBranchBrowsable *parent=0)
 Askes all registered generators to fill their browsables into the list. More...
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 

Protected Member Functions

 TVirtualBranchBrowsable (const TBranch *b, TClass *type, Bool_t typeIsPointer, const TVirtualBranchBrowsable *parent=0)
 Constructor setting all members according to parameters. More...
 
void SetType (TClass *type)
 
void SetTypeIsPointer (Bool_t set=kTRUE)
 
- Protected Member Functions inherited from TObject
virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected). More...
 
void MakeZombie ()
 

Static Protected Member Functions

static TClassGetCollectionContainedType (const TBranch *b, const TVirtualBranchBrowsable *parent, TClass *&contained)
 Check whether the branch (or the parent) contains a collection. More...
 
static std::list< MethodCreateListOfBrowsables_t > & GetRegisteredGenerators ()
 returns the list of registered generator methods More...
 
static void RegisterGenerator (MethodCreateListOfBrowsables_t generator)
 Adds a generator to be called when browsing branches. More...
 
static void UnregisterGenerator (MethodCreateListOfBrowsables_t generator)
 Removes a generator from the list of generators to be called when browsing branches. More...
 

Static Private Member Functions

static void RegisterDefaultGenerators ()
 Adds the default generators. More...
 

Private Attributes

const TBranchfBranch
 pointer to the branch element representing the top object More...
 
TClassfClass
 pointer to TClass representing our type (i.e. return type for methods), 0 if basic type More...
 
TListfLeaves
 pointer to leaves More...
 
const TVirtualBranchBrowsablefParent
 parent method if this method is member of a returned class More...
 
Bool_t fTypeIsPointer
 return type is pointer to class More...
 

Static Private Attributes

static std::list< MethodCreateListOfBrowsables_tfgGenerators
 list of MethodCreateListOfBrowsables_t called by CreateListOfBrowsables More...
 
static Bool_t fgGeneratorsSet =kFALSE
 have we set the generators yet? empty is not good enough - user might have removed them More...
 

Additional Inherited Members

- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

#include <TBranchBrowsable.h>

Inheritance diagram for TVirtualBranchBrowsable:
[legend]

Member Typedef Documentation

◆ MethodCreateListOfBrowsables_t

typedef Int_t(* TVirtualBranchBrowsable::MethodCreateListOfBrowsables_t) (TList &, const TBranch *branch, const TVirtualBranchBrowsable *parent)

Definition at line 36 of file TBranchBrowsable.h.

Constructor & Destructor Documentation

◆ ~TVirtualBranchBrowsable()

TVirtualBranchBrowsable::~TVirtualBranchBrowsable ( )

Destructor. Delete our leaves.

Definition at line 97 of file TBranchBrowsable.cxx.

◆ TVirtualBranchBrowsable()

TVirtualBranchBrowsable::TVirtualBranchBrowsable ( const TBranch b,
TClass type,
Bool_t  typeIsPointer,
const TVirtualBranchBrowsable parent = 0 
)
protected

Constructor setting all members according to parameters.

Definition at line 84 of file TBranchBrowsable.cxx.

Member Function Documentation

◆ Browse()

void TVirtualBranchBrowsable::Browse ( TBrowser b)
virtual

Calls TTree::Draw on the method if return type is not a class; otherwise expands returned object's "folder".

Reimplemented from TObject.

Reimplemented in TCollectionPropertyBrowsable.

Definition at line 106 of file TBranchBrowsable.cxx.

◆ FillListOfBrowsables()

Int_t TVirtualBranchBrowsable::FillListOfBrowsables ( TList li,
const TBranch branch,
const TVirtualBranchBrowsable parent = 0 
)
static

Askes all registered generators to fill their browsables into the list.

The browsables are generated for a given parent, or (if 0), for a given branch. The branch is passed down to leaves of TVirtualBranchBrowsable, too, as we need to access the branch's TTree to be able to traw.

Definition at line 138 of file TBranchBrowsable.cxx.

◆ GetBranch()

const TBranch* TVirtualBranchBrowsable::GetBranch ( ) const
inline

Definition at line 54 of file TBranchBrowsable.h.

◆ GetClassType()

TClass* TVirtualBranchBrowsable::GetClassType ( ) const
inline

Definition at line 60 of file TBranchBrowsable.h.

◆ GetCollectionContainedType()

TClass * TVirtualBranchBrowsable::GetCollectionContainedType ( const TBranch branch,
const TVirtualBranchBrowsable parent,
TClass *&  contained 
)
staticprotected

Check whether the branch (or the parent) contains a collection.

If it does, set "contained" to the contained type (if we can retrieve it) and return the TClass for the collection. Set "contained" to the branch's (or parent's) contained object's class for non-collections, returning 0.

Only one of "branch" or "parent" can ge given (depending on whether we are creating browsable objects for a branch or for another browsable object)

Definition at line 160 of file TBranchBrowsable.cxx.

◆ GetIconName()

const char* TVirtualBranchBrowsable::GetIconName ( ) const
inlinevirtual

Returns mime type name of object.

Used by the TBrowser (via TGMimeTypes class). Override for class of which you would like to have different icons for objects of the same class.

Reimplemented from TObject.

Reimplemented in TMethodBrowsable.

Definition at line 41 of file TBranchBrowsable.h.

◆ GetLeaves()

TList * TVirtualBranchBrowsable::GetLeaves ( ) const

Return list of leaves. If not set up yet we'll create them.

Definition at line 271 of file TBranchBrowsable.cxx.

◆ GetParent()

const TVirtualBranchBrowsable* TVirtualBranchBrowsable::GetParent ( ) const
inline

Definition at line 57 of file TBranchBrowsable.h.

◆ GetRegisteredGenerators()

std::list< TVirtualBranchBrowsable::MethodCreateListOfBrowsables_t > & TVirtualBranchBrowsable::GetRegisteredGenerators ( )
staticprotected

returns the list of registered generator methods

Definition at line 285 of file TBranchBrowsable.cxx.

◆ GetScope()

void TVirtualBranchBrowsable::GetScope ( TString scope) const

Returns the full name for TTree::Draw to draw *this.

Recursively appends, starting at the top TBranch, all method / object names with proper reference operators (->, .) depending on fTypeIsPointer.

Definition at line 296 of file TBranchBrowsable.cxx.

◆ IsFolder()

Bool_t TVirtualBranchBrowsable::IsFolder ( ) const
inlinevirtual

Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).

Reimplemented from TObject.

Definition at line 47 of file TBranchBrowsable.h.

◆ RegisterDefaultGenerators()

void TVirtualBranchBrowsable::RegisterDefaultGenerators ( )
staticprivate

Adds the default generators.

The user can remove any of them as follows:

TMethodBrowsable::Unregister();

which will cause the browser not to show any methods.

Definition at line 341 of file TBranchBrowsable.cxx.

◆ RegisterGenerator()

void TVirtualBranchBrowsable::RegisterGenerator ( MethodCreateListOfBrowsables_t  generator)
staticprotected

Adds a generator to be called when browsing branches.

Called by the Register method, which should be implemented for all derived classes (see e.g. TMethodBrowsable::Register())

Definition at line 356 of file TBranchBrowsable.cxx.

◆ SetType()

void TVirtualBranchBrowsable::SetType ( TClass type)
inlineprotected

Definition at line 79 of file TBranchBrowsable.h.

◆ SetTypeIsPointer()

void TVirtualBranchBrowsable::SetTypeIsPointer ( Bool_t  set = kTRUE)
inlineprotected

Definition at line 82 of file TBranchBrowsable.h.

◆ TypeIsPointer()

Bool_t TVirtualBranchBrowsable::TypeIsPointer ( ) const
inline

Definition at line 63 of file TBranchBrowsable.h.

◆ UnregisterGenerator()

void TVirtualBranchBrowsable::UnregisterGenerator ( MethodCreateListOfBrowsables_t  generator)
staticprotected

Removes a generator from the list of generators to be called when browsing branches.

The user can remove any of the generators as follows:

TMethodBrowsable::Unregister();

which will cause the browser not to show any methods.

Definition at line 372 of file TBranchBrowsable.cxx.

Member Data Documentation

◆ fBranch

const TBranch* TVirtualBranchBrowsable::fBranch
private

pointer to the branch element representing the top object

Definition at line 88 of file TBranchBrowsable.h.

◆ fClass

TClass* TVirtualBranchBrowsable::fClass
private

pointer to TClass representing our type (i.e. return type for methods), 0 if basic type

Definition at line 91 of file TBranchBrowsable.h.

◆ fgGenerators

std::list< TVirtualBranchBrowsable::MethodCreateListOfBrowsables_t > TVirtualBranchBrowsable::fgGenerators
staticprivate

list of MethodCreateListOfBrowsables_t called by CreateListOfBrowsables

Definition at line 93 of file TBranchBrowsable.h.

◆ fgGeneratorsSet

Bool_t TVirtualBranchBrowsable::fgGeneratorsSet =kFALSE
staticprivate

have we set the generators yet? empty is not good enough - user might have removed them

Definition at line 94 of file TBranchBrowsable.h.

◆ fLeaves

TList* TVirtualBranchBrowsable::fLeaves
private

pointer to leaves

Definition at line 90 of file TBranchBrowsable.h.

◆ fParent

const TVirtualBranchBrowsable* TVirtualBranchBrowsable::fParent
private

parent method if this method is member of a returned class

Definition at line 89 of file TBranchBrowsable.h.

◆ fTypeIsPointer

Bool_t TVirtualBranchBrowsable::fTypeIsPointer
private

return type is pointer to class

Definition at line 92 of file TBranchBrowsable.h.

Libraries for TVirtualBranchBrowsable:
[legend]

The documentation for this class was generated from the following files:
TMethodBrowsable::Unregister
static void Unregister()
Wrapper for the registration method.
Definition: TBranchBrowsable.cxx:594
TVirtualBranchBrowsable
Definition: TBranchBrowsable.h:29
TVirtualBranchBrowsable::UnregisterGenerator
static void UnregisterGenerator(MethodCreateListOfBrowsables_t generator)
Removes a generator from the list of generators to be called when browsing branches.
Definition: TBranchBrowsable.cxx:372
Int_t
int Int_t
Definition: RtypesCore.h:45
TBranch
Definition: TBranch.h:89
TVirtualBranchBrowsable::RegisterGenerator
static void RegisterGenerator(MethodCreateListOfBrowsables_t generator)
Adds a generator to be called when browsing branches.
Definition: TBranchBrowsable.cxx:356
TList
Definition: TList.h:44