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 their 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:
where GetBrowsables is a static member function of your class, that creates the browsable helper objects, and has the signature
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) |
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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. | |
void | Browse (TBrowser *b) override |
Calls TTree::Draw on the method if return type is not a class; otherwise expands returned object's "folder". | |
const TBranch * | GetBranch () const |
return the parent branch (might be many levels up) | |
TClass * | GetClassType () const |
return the type of this browsable object | |
const char * | GetIconName () const override |
return icon shown when browsing a TVirtualBranchBrowsable | |
TList * | GetLeaves () const |
Return list of leaves. If not set up yet we'll create them. | |
const TVirtualBranchBrowsable * | GetParent () const |
return the parent TVirtualBranchBrowsable | |
void | GetScope (TString &scope) const |
Returns the full name for TTree::Draw to draw *this. | |
Bool_t | IsFolder () const override |
check whether we have sub-elements | |
Bool_t | TypeIsPointer () const |
return whether the type of this browsable object is a pointer | |
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TNamed () | |
TNamed (const char *name, const char *title) | |
TNamed (const TNamed &named) | |
TNamed copy ctor. | |
TNamed (const TString &name, const TString &title) | |
virtual | ~TNamed () |
TNamed destructor. | |
virtual void | Clear (Option_t *option="") |
Set name and title to empty strings (""). | |
virtual TObject * | Clone (const char *newname="") const |
Make a clone of an object using the Streamer facility. | |
virtual Int_t | Compare (const TObject *obj) const |
Compare two TNamed objects. | |
virtual void | Copy (TObject &named) const |
Copy this to obj. | |
virtual void | FillBuffer (char *&buffer) |
Encode TNamed into output buffer. | |
virtual const char * | GetName () const |
Returns name of object. | |
virtual const char * | GetTitle () const |
Returns title of object. | |
virtual ULong_t | Hash () const |
Return hash value for this object. | |
virtual Bool_t | IsSortable () const |
virtual void | ls (Option_t *option="") const |
List TNamed name and title. | |
TNamed & | operator= (const TNamed &rhs) |
TNamed assignment operator. | |
virtual void | Print (Option_t *option="") const |
Print TNamed name and title. | |
virtual void | SetName (const char *name) |
Set the name of the TNamed. | |
virtual void | SetNameTitle (const char *name, const char *title) |
Set all the TNamed parameters (name and title). | |
virtual void | SetTitle (const char *title="") |
Set the title of the TNamed. | |
virtual Int_t | Sizeof () const |
Return size of the TNamed part of the TObject. | |
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TObject () | |
TObject constructor. | |
TObject (const TObject &object) | |
TObject copy ctor. | |
virtual | ~TObject () |
TObject destructor. | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. | |
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. | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. | |
virtual void | Delete (Option_t *option="") |
Delete this object. | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. | |
virtual void | Draw (Option_t *option="") |
Default Draw method for all objects. | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad) . | |
virtual void | Dump () const |
Dump contents of object on stdout. | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. | |
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. | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=0) |
Execute method on this object with parameters stored in the TObjArray. | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). | |
virtual Option_t * | GetOption () const |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. | |
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. | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. | |
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). | |
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). | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification. | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. | |
void | operator delete (void *ptr) |
Operator delete. | |
void | operator delete[] (void *ptr) |
Operator delete []. | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. | |
virtual void | Paint (Option_t *option="") |
This method must be overridden if a class wants to paint itself. | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. | |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. | |
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. | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. | |
Static Public Member Functions | |
static Int_t | FillListOfBrowsables (TList &list, const TBranch *branch, const TVirtualBranchBrowsable *parent=nullptr) |
Askes all registered generators to fill their browsables into the list. | |
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static Long_t | GetDtorOnly () |
Return destructor only flag. | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. | |
Protected Member Functions | |
TVirtualBranchBrowsable (const TBranch *b, TClass *type, Bool_t typeIsPointer, const TVirtualBranchBrowsable *parent=nullptr) | |
Constructor setting all members according to parameters. | |
void | SetType (TClass *type) |
sets the type of this browsable object | |
void | SetTypeIsPointer (Bool_t set=kTRUE) |
sets whether the type of this browsable object is a pointer | |
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virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
Static Protected Member Functions | |
static TClass * | GetCollectionContainedType (const TBranch *b, const TVirtualBranchBrowsable *parent, TClass *&contained) |
Check whether the branch (or the parent) contains a collection. | |
static std::list< MethodCreateListOfBrowsables_t > & | GetRegisteredGenerators () |
returns the list of registered generator methods | |
static void | RegisterGenerator (MethodCreateListOfBrowsables_t generator) |
Adds a generator to be called when browsing branches. | |
static void | UnregisterGenerator (MethodCreateListOfBrowsables_t generator) |
Removes a generator from the list of generators to be called when browsing branches. | |
Private Member Functions | |
ClassDefOverride (TVirtualBranchBrowsable, 0) | |
Base class for helper objects used for browsing. | |
Static Private Member Functions | |
static void | RegisterDefaultGenerators () |
Adds the default generators. | |
Private Attributes | |
const TBranch * | fBranch {nullptr} |
pointer to the branch element representing the top object | |
TClass * | fClass {nullptr} |
pointer to TClass representing our type (i.e. return type for methods), 0 if basic type | |
TList * | fLeaves {nullptr} |
pointer to leaves | |
const TVirtualBranchBrowsable * | fParent {nullptr} |
parent method if this method is member of a returned class | |
Bool_t | fTypeIsPointer {kFALSE} |
return type is pointer to class | |
Static Private Attributes | |
static std::list< MethodCreateListOfBrowsables_t > | fgGenerators |
list of MethodCreateListOfBrowsables_t called by CreateListOfBrowsables | |
static Bool_t | fgGeneratorsSet =kFALSE |
have we set the generators yet? empty is not good enough - user might have removed them | |
Additional Inherited Members | |
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enum | { kOnlyPrepStep = BIT(3) } |
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TString | fName |
TString | fTitle |
#include <TBranchBrowsable.h>
typedef Int_t(* TVirtualBranchBrowsable::MethodCreateListOfBrowsables_t) (TList &, const TBranch *branch, const TVirtualBranchBrowsable *parent) |
Definition at line 35 of file TBranchBrowsable.h.
TVirtualBranchBrowsable::~TVirtualBranchBrowsable | ( | ) |
Destructor. Delete our leaves.
Definition at line 97 of file TBranchBrowsable.cxx.
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protected |
Constructor setting all members according to parameters.
Definition at line 84 of file TBranchBrowsable.cxx.
Calls TTree::Draw on the method if return type is not a class; otherwise expands returned object's "folder".
Reimplemented from TObject.
Definition at line 106 of file TBranchBrowsable.cxx.
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private |
Base class for helper objects used for browsing.
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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.
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inline |
return the parent branch (might be many levels up)
Definition at line 60 of file TBranchBrowsable.h.
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inline |
return the type of this browsable object
Definition at line 66 of file TBranchBrowsable.h.
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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.
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inlineoverridevirtual |
return icon shown when browsing a TVirtualBranchBrowsable
Reimplemented from TObject.
Definition at line 43 of file TBranchBrowsable.h.
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.
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inline |
return the parent TVirtualBranchBrowsable
Definition at line 63 of file TBranchBrowsable.h.
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staticprotected |
returns the list of registered generator methods
Definition at line 285 of file TBranchBrowsable.cxx.
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.
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inlineoverridevirtual |
check whether we have sub-elements
Reimplemented from TObject.
Definition at line 54 of file TBranchBrowsable.h.
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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.
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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.
sets the type of this browsable object
Definition at line 85 of file TBranchBrowsable.h.
sets whether the type of this browsable object is a pointer
Definition at line 88 of file TBranchBrowsable.h.
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inline |
return whether the type of this browsable object is a pointer
Definition at line 69 of file TBranchBrowsable.h.
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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.
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private |
pointer to the branch element representing the top object
Definition at line 92 of file TBranchBrowsable.h.
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private |
pointer to TClass representing our type (i.e. return type for methods), 0 if basic type
Definition at line 95 of file TBranchBrowsable.h.
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staticprivate |
list of MethodCreateListOfBrowsables_t called by CreateListOfBrowsables
Definition at line 97 of file TBranchBrowsable.h.
have we set the generators yet? empty is not good enough - user might have removed them
Definition at line 98 of file TBranchBrowsable.h.
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private |
pointer to leaves
Definition at line 94 of file TBranchBrowsable.h.
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private |
parent method if this method is member of a returned class
Definition at line 93 of file TBranchBrowsable.h.
return type is pointer to class
Definition at line 96 of file TBranchBrowsable.h.