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ROOT 6.10/09 Reference Guide |
Handle messages that might be generated by the system.
By default a handler only keeps track of the different messages generated for a specific class. By deriving from this class and overriding Notify() one can implement custom message handling. In Notify() one has access to the message id and the object generating the message. One can install more than one message handler per class. A message handler can be removed or again added when needed.
Definition at line 34 of file TMessageHandler.h.
Public Member Functions | |
TMessageHandler (const TClass *cl, Bool_t derived=kTRUE) | |
Create a new message handler for class cl and add it to the list of message handlers. More... | |
TMessageHandler (const char *cl, Bool_t derived=kTRUE) | |
Create a new message handler for class named cl and add it to the list of message handlers. More... | |
virtual | ~TMessageHandler () |
Clean up the message handler. More... | |
virtual void | Add () |
Add this message handler to the list of messages handlers. More... | |
virtual void | Added () |
virtual Int_t | GetMessageCount (Int_t messId) const |
Return counter for message with ID=messid. More... | |
Int_t | GetSize () const |
virtual Int_t | GetTotalMessageCount () const |
Return total number of messages. More... | |
Bool_t | HandleDerived () const |
virtual void | HandleMessage (Int_t id, const TObject *obj) |
Store message origin, keep statistics and call Notify(). More... | |
virtual void | Notified () |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification. More... | |
virtual void | Print (Option_t *option="") const |
Print statistics for this message handler. More... | |
virtual void | Remove () |
Remove this message handler from the list of messages handlers. More... | |
virtual void | Removed () |
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TNamed () | |
TNamed (const char *name, const char *title) | |
TNamed (const TString &name, const TString &title) | |
TNamed (const TNamed &named) | |
TNamed copy ctor. More... | |
virtual | ~TNamed () |
virtual void | Clear (Option_t *option="") |
Set name and title to empty strings (""). More... | |
virtual TObject * | Clone (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... | |
TNamed & | operator= (const TNamed &rhs) |
TNamed assignment operator. 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... | |
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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... | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. 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 TObject * | DrawClone (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 TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. More... | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. More... | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. More... | |
virtual const char * | GetIconName () const |
Returns mime type name of 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_t * | GetOption () 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... | |
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... | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More... | |
Bool_t | IsOnHeap () const |
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... | |
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... | |
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. 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, Bool_t set) |
Set or unset the user status bits as specified in f. More... | |
void | SetBit (UInt_t f) |
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... | |
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... | |
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TQObject () | |
TQObject Constructor. More... | |
virtual | ~TQObject () |
TQObject Destructor. More... | |
Bool_t | AreSignalsBlocked () const |
Bool_t | BlockSignals (Bool_t b) |
virtual void | ChangedBy (const char *method) |
void | CollectClassSignalLists (TList &list, TClass *cls) |
Collect class signal lists from class cls and all its base-classes. More... | |
Bool_t | Connect (const char *signal, const char *receiver_class, void *receiver, const char *slot) |
Non-static method is used to connect from the signal of this object to the receiver slot. More... | |
virtual void | Connected (const char *) |
virtual void | Destroyed () |
Bool_t | Disconnect (const char *signal=0, void *receiver=0, const char *slot=0) |
Disconnects signal of this object from slot of receiver. More... | |
virtual void | Disconnected (const char *) |
template<typename T > | |
void | Emit (const char *signal, const T &arg) |
Activate signal with single parameter. More... | |
void | Emit (const char *signal) |
Acitvate signal without args. More... | |
template<typename... T> | |
void | EmitVA (const char *signal_name, Int_t, const T &... params) |
Emit a signal with a varying number of arguments. More... | |
TList * | GetListOfClassSignals () const |
Returns pointer to list of signals of this class. More... | |
TList * | GetListOfConnections () const |
TList * | GetListOfSignals () const |
virtual Bool_t | HasConnection (const char *signal_name) const |
Return true if there is any object connected to this signal. More... | |
virtual void | HighPriority (const char *signal_name, const char *slot_name=0) |
virtual void | LowPriority (const char *signal_name, const char *slot_name=0) |
virtual void | Message (const char *msg) |
virtual Int_t | NumberOfConnections () const |
Return number of connections for this object. More... | |
virtual Int_t | NumberOfSignals () const |
Return number of signals for this object. More... | |
Protected Member Functions | |
void * | GetSender () |
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virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). More... | |
void | MakeZombie () |
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virtual const char * | GetSenderClassName () const |
Protected Attributes | |
const TClass * | fClass |
Int_t * | fCnts |
Bool_t | fDerived |
Int_t | fMessId |
Int_t * | fMessIds |
const TObject * | fMessObj |
Int_t | fSize |
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TString | fName |
TString | fTitle |
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TList * | fListOfConnections |
list of signals from this object More... | |
TList * | fListOfSignals |
Bool_t | fSignalsBlocked |
list of connections to this object More... | |
Additional Inherited Members | |
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enum | { kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff } |
enum | { kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) } |
enum | EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) } |
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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... | |
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static Bool_t | AreAllSignalsBlocked () |
Returns true if all signals are blocked. More... | |
static Bool_t | BlockAllSignals (Bool_t b) |
Block or unblock all signals. Returns the previous block status. More... | |
static Bool_t | Connect (TQObject *sender, const char *signal, const char *receiver_class, void *receiver, const char *slot) |
Create connection between sender and receiver. More... | |
static Bool_t | Connect (const char *sender_class, const char *signal, const char *receiver_class, void *receiver, const char *slot) |
This method allows to make a connection from any object of the same class to a single slot. More... | |
static Bool_t | Disconnect (TQObject *sender, const char *signal=0, void *receiver=0, const char *slot=0) |
Disconnects signal in object sender from slot_method in object receiver. More... | |
static Bool_t | Disconnect (const char *class_name, const char *signal, void *receiver=0, const char *slot=0) |
Disconnects "class signal". More... | |
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static Int_t | CheckConnectArgs (TQObject *sender, TClass *sender_class, const char *signal, TClass *receiver_class, const char *slot) |
Checking of consitency of sender/receiver methods/arguments. More... | |
static TString | CompressName (const char *method_name) |
Removes "const" words and blanks from full (with prototype) method name and resolve any typedefs in the method signature. More... | |
static Bool_t | ConnectToClass (TQObject *sender, const char *signal, TClass *receiver_class, void *receiver, const char *slot) |
Create connection between sender and receiver. More... | |
static Bool_t | ConnectToClass (const char *sender_class, const char *signal, TClass *receiver_class, void *receiver, const char *slot) |
This method allows to make connection from any object of the same class to the receiver object. More... | |
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static Bool_t | fgAllSignalsBlocked = kFALSE |
flag used for suppression of signals More... | |
#include <TMessageHandler.h>
Create a new message handler for class cl and add it to the list of message handlers.
Definition at line 41 of file TMessageHandler.cxx.
Create a new message handler for class named cl and add it to the list of message handlers.
Definition at line 63 of file TMessageHandler.cxx.
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virtual |
Clean up the message handler.
Definition at line 82 of file TMessageHandler.cxx.
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virtual |
Add this message handler to the list of messages handlers.
Definition at line 93 of file TMessageHandler.cxx.
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inlinevirtual |
Definition at line 64 of file TMessageHandler.h.
Return counter for message with ID=messid.
Definition at line 108 of file TMessageHandler.cxx.
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inlineprotectedvirtual |
Reimplemented from TQObject.
Definition at line 45 of file TMessageHandler.h.
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inline |
Definition at line 52 of file TMessageHandler.h.
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virtual |
Return total number of messages.
Definition at line 120 of file TMessageHandler.cxx.
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inline |
Definition at line 55 of file TMessageHandler.h.
Store message origin, keep statistics and call Notify().
Definition at line 133 of file TMessageHandler.cxx.
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inlinevirtual |
Definition at line 66 of file TMessageHandler.h.
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virtual |
This method must be overridden to handle object notification.
Reimplemented from TObject.
Definition at line 184 of file TMessageHandler.cxx.
Print statistics for this message handler.
Reimplemented from TNamed.
Definition at line 200 of file TMessageHandler.cxx.
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Remove this message handler from the list of messages handlers.
Definition at line 235 of file TMessageHandler.cxx.
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inlinevirtual |
Definition at line 65 of file TMessageHandler.h.
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protected |
Definition at line 37 of file TMessageHandler.h.
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protected |
Definition at line 41 of file TMessageHandler.h.
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protected |
Definition at line 43 of file TMessageHandler.h.
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protected |
Definition at line 39 of file TMessageHandler.h.
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protected |
Definition at line 42 of file TMessageHandler.h.
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protected |
Definition at line 38 of file TMessageHandler.h.
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protected |
Definition at line 40 of file TMessageHandler.h.