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TPie Class Reference

Define a Pie Chart.

The possible drawing options are:

Option Description
"R" Print the labels along the central "R"adius of slices.
"T" Print the label in a direction "T"angent to circle that describes the TPie.
"SC" Paint the labels with the "S"ame "C"olor as the slices.
"3D" Draw the pie-chart with a pseudo 3D effect.
"NOL" No OutLine: Don't draw the slices' outlines, any property over the slices' line is ignored.
">" Sort the slices in increasing order.
"<" Sort the slices in decreasing order.

After the use of > or < options the internal order of the TPieSlices is changed.

Labels format

The labels' format can be changed with TPie::SetLabelFormat().

The format string must contain one of these modifiers:

Modifier Description
"%txt" to print the text label associated with the slice
"%val" to print the numeric value of the slice
"%frac" to print the relative fraction of this slice
"%perc" to print the % of this slice

Example:

mypie->SetLabelFormat("%txt (%frac)");

The numeric format in the label can be changed with TPie::SetFractionFormat. The numeric format the slices' values can be changed with TPie::SetValueFormat. The numeric format for the percent value of a slice can be changed with TPie::SetPercentFormat.

If the colors are not specified (nullptr) they are automatically taken from the current color palette as shown in the following example.

{
float vals[] = {10., 2., 5., 7.5};
const char* labels[]={"Label 1","Label 2","Label 3","Label4"};
auto C = new TCanvas("C","TPie test",500,500);
auto pie = new TPie("pie", "Pie Title", 4, vals, nullptr, labels);
pie->SetTextFont(42);
pie->SetTextSize(0.04);
pie->SetLabelFormat("#splitline{%txt}{%perc}");
pie->SetLabelsOffset(.02);
pie->SetRadius(.3);
pie->Draw("");
}
The Canvas class.
Definition TCanvas.h:23
Define a Pie Chart.
Definition TPie.h:23
constexpr Double_t C()
Velocity of light in .
Definition TMath.h:117

More complex example:

void piechart()
{
Float_t vals[] = {.2, 1.1, .6, .9, 2.3};
Int_t colors[] = {2, 3, 4, 5, 6};
Int_t nvals = sizeof(vals) / sizeof(vals[0]);
TCanvas *cpie = new TCanvas("cpie", "TPie test", 700, 700);
cpie->Divide(2, 2);
TPie *pie1 = new TPie("pie1", "Pie with offset and no colors", nvals, vals);
TPie *pie2 = new TPie("pie2", "Pie with radial labels", nvals, vals, colors);
TPie *pie3 = new TPie("pie3", "Pie with tangential labels", nvals, vals, colors);
TPie *pie4 = new TPie("pie4", "Pie with verbose labels", nvals, vals, colors);
cpie->cd(1);
pie1->SetAngularOffset(30.);
pie1->SetEntryRadiusOffset(4, 0.1);
pie1->SetRadius(.35);
pie1->Draw("3d");
cpie->cd(2);
pie2->SetEntryRadiusOffset(2, .05);
pie2->SetEntryLineColor(2, 2);
pie2->SetEntryLineWidth(2, 5);
pie2->SetEntryLineStyle(2, 2);
pie2->SetEntryFillStyle(1, 3030);
pie2->SetCircle(.5, .45, .3);
pie2->Draw("rsc");
cpie->cd(3);
pie3->SetY(.32);
pie3->GetSlice(0)->SetValue(.8);
pie3->GetSlice(1)->SetFillStyle(3031);
pie3->SetLabelsOffset(-.1);
pie3->Draw("3d t nol");
TLegend *pieleg = pie3->MakeLegend();
pieleg->SetY1(.56);
pieleg->SetY2(.86);
cpie->cd(4);
pie4->SetRadius(.2);
pie4->SetLabelsOffset(.01);
pie4->SetLabelFormat("#splitline{%val (%perc)}{%txt}");
pie4->Draw("nol <");
}
int Int_t
Signed integer 4 bytes (int)
Definition RtypesCore.h:59
float Float_t
Float 4 bytes (float)
Definition RtypesCore.h:71
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Color * colors
Definition X3DBuffer.c:21
This class displays a legend box (TPaveText) containing several legend entries.
Definition TLegend.h:23

Definition at line 23 of file TPie.h.

Public Types

enum  {
  kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = (1ULL << ( 0 )) , kOverwrite = (1ULL << ( 1 )) , kWriteDelete = (1ULL << ( 2 )) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = (1ULL << ( 3 )) }
 
enum  EStatusBits {
  kCanDelete = (1ULL << ( 0 )) , kMustCleanup = (1ULL << ( 3 )) , kIsReferenced = (1ULL << ( 4 )) , kHasUUID = (1ULL << ( 5 )) ,
  kCannotPick = (1ULL << ( 6 )) , kNoContextMenu = (1ULL << ( 8 )) , kInvalidObject = (1ULL << ( 13 ))
}
 

Public Member Functions

 TPie ()
 Default constructor.
 
 TPie (const char *, const char *, Int_t)
 This constructor creates a pie chart when only the number of the slices is known.
 
 TPie (const char *, const char *, Int_t, Double_t *, Int_t *cols=nullptr, const char *lbls[]=nullptr)
 Normal constructor.
 
 TPie (const char *, const char *, Int_t, Float_t *, Int_t *cols=nullptr, const char *lbls[]=nullptr)
 Normal constructor (Float_t).
 
 TPie (const TH1 *h)
 Constructor from a TH1.
 
 TPie (const TPie &)
 Copy constructor.
 
 ~TPie () override
 Destructor.
 
void AbstractMethod (const char *method) const
 Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad.
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action.
 
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.
 
void Clear (Option_t *option="") override
 Set name and title to empty strings ("").
 
TObjectClone (const char *newname="") const override
 Make a clone of an object using the Streamer facility.
 
Int_t Compare (const TObject *obj) const override
 Compare two TNamed objects.
 
void Copy (TAttText &atttext) const
 Copy this text attributes to a new TAttText.
 
void Copy (TObject &named) const override
 Copy this to obj.
 
virtual void Delete (Option_t *option="")
 Delete this object.
 
Int_t DistancetoPrimitive (Int_t px, Int_t py) override
 Evaluate the distance to the chart in gPad.
 
Int_t DistancetoSlice (Int_t, Int_t)
 Returns the slice number at the pixel position (px,py).
 
void Draw (Option_t *option="l") override
 Draw the pie chart.
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs.
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).
 
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=nullptr)
 Execute method on this object with the given parameter string, e.g.
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=nullptr)
 Execute method on this object with parameters stored in the TObjArray.
 
void ExecuteEvent (Int_t, Int_t, Int_t) override
 Execute the mouse events.
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message.
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer.
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes.
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes.
 
Float_t GetAngle3D ()
 
Double_t GetAngularOffset ()
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object.
 
Int_t GetEntries ()
 
Int_t GetEntryFillColor (Int_t)
 Return the color of the slice number "i".
 
Int_t GetEntryFillStyle (Int_t)
 Return the style use to fill the slice number "i".
 
const char * GetEntryLabel (Int_t)
 Returns the label of the entry number "i".
 
Int_t GetEntryLineColor (Int_t)
 Return the line color used to outline thi "i" slice.
 
Int_t GetEntryLineStyle (Int_t)
 Return the style used to outline thi "i" slice.
 
Int_t GetEntryLineWidth (Int_t)
 Return the line width used to outline thi "i" slice.
 
Double_t GetEntryRadiusOffset (Int_t)
 Return the radial offset's value for the slice number "i".
 
Double_t GetEntryVal (Int_t)
 Return the value associated with the slice number "i".
 
const char * GetFractionFormat ()
 
Double_t GetHeight ()
 
virtual const char * GetIconName () const
 Returns mime type name of object.
 
const char * GetLabelFormat ()
 
Float_t GetLabelsOffset ()
 
TLegendGetLegend ()
 If created before by Paint option or by MakeLegend method return the pointer to the legend, otherwise return 0;.
 
const char * GetName () const override
 Returns name of object.
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py).
 
virtual Option_tGetOption () const
 
const char * GetPercentFormat ()
 
Double_t GetRadius ()
 
TPieSliceGetSlice (Int_t i)
 Return the reference to the slice of index 'id'.
 
virtual Short_t GetTextAlign () const
 Return the text alignment.
 
virtual Float_t GetTextAngle () const
 Return the text angle.
 
virtual Color_t GetTextColor () const
 Return the text color.
 
virtual Font_t GetTextFont () const
 Return the text font.
 
virtual Float_t GetTextSize () const
 Return the text size.
 
virtual Float_t GetTextSizePercent (Float_t size)
 Return the text in percent of the pad size.
 
virtual Float_t GetTextSizePixels (TVirtualPad &pad) const
 Return the text size in pixels for specified pad.
 
virtual Float_t GetTextSizeRelative (TVirtualPad &pad) const
 Return the text size in relative units.
 
const char * GetTitle () const override
 Returns title of object.
 
virtual UInt_t GetUniqueID () const
 Return the unique object id.
 
const char * GetValueFormat ()
 
Double_t GetX ()
 
Double_t GetY ()
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out.
 
ULong_t Hash () const override
 Return hash value for this object.
 
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)
 
TClassIsA () const override
 
Bool_t IsDestructed () const
 IsDestructed.
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory).
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects).
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
Bool_t IsSortable () const override
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
void ls (Option_t *option="") const override
 List TNamed name and title.
 
TLegendMakeLegend (Double_t x1=.65, Double_t y1=.65, Double_t x2=.95, Double_t y2=.95, const char *leg_header="")
 This method create a legend that explains the contents of the slice for this pie-chart.
 
void MakeSlices (Bool_t force=kFALSE)
 Make the slices.
 
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 void Modify ()
 Change current text attributes if necessary.
 
virtual void ModifyOn (TVirtualPad &pad)
 Change current text attributes if necessary on specified pad.
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification (the base implementation is no-op).
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete.
 
void operator delete (void *, size_t)
 Operator delete for sized deallocation.
 
void operator delete (void *ptr)
 Operator delete.
 
void operator delete (void *ptr, void *vp)
 Only called by placement new when throwing an exception.
 
void operator delete[] (void *, size_t)
 Operator delete [] for sized deallocation.
 
void operator delete[] (void *ptr)
 Operator delete [].
 
void operator delete[] (void *ptr, void *vp)
 Only called by placement new[] when throwing an exception.
 
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)
 
void Paint (Option_t *) override
 Paint a Pie chart in a canvas.
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list.
 
void Print (Option_t *option="") const override
 Print TNamed name and title.
 
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.
 
virtual void ResetAttText (Option_t *toption="")
 Reset this text attributes to default values.
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename.
 
void SavePrimitive (std::ostream &out, Option_t *opts="") override
 Save primitive as a C++ statement(s) on output stream out.
 
virtual void SaveTextAttributes (std::ostream &out, const char *name, Int_t alidef=12, Float_t angdef=0, Int_t coldef=1, Int_t fondef=61, Float_t sizdef=1)
 Save text attributes as C++ statement(s) on output stream out.
 
void SetAngle3D (Float_t val=30.)
 Set the value of for the pseudo 3D view angle, in degree.
 
void SetAngularOffset (Double_t)
 Set the global angular offset for slices in degree [0,360].
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f.
 
void SetCircle (Double_t x=.5, Double_t y=.5, Double_t rad=.4)
 Set the coordinates of the circle that describe the pie:
 
virtual void SetDrawOption (Option_t *option="")
 Set drawing option for object.
 
void SetEntryFillColor (Int_t, Int_t)
 Set the color for the slice "i".
 
void SetEntryFillStyle (Int_t, Int_t)
 Set the fill style for the "i" slice.
 
void SetEntryLabel (Int_t, const char *text="Slice")
 Set slice number "i" label.
 
void SetEntryLineColor (Int_t, Int_t)
 Set the color for the slice's outline. "i" is the slice number.
 
void SetEntryLineStyle (Int_t, Int_t)
 Set the style for the slice's outline. "i" is the slice number.
 
void SetEntryLineWidth (Int_t, Int_t)
 Set the width of the slice's outline. "i" is the slice number.
 
void SetEntryRadiusOffset (Int_t, Double_t)
 Set the distance, in the direction of the radius of the slice.
 
void SetEntryVal (Int_t, Double_t)
 Set the value of a slice.
 
void SetFillColors (Int_t *)
 Set the fill colors for all the TPie's slices.
 
void SetFractionFormat (const char *)
 Set numeric format in the label, is used if the label format there is the modifier frac, in this case the value is printed using this format.
 
void SetHeight (Double_t val=.08)
 Set the height, in pixel, for the piechart if is drawn using the pseudo-3d mode.
 
void SetLabelFormat (const char *)
 This method is used to customize the label format.
 
void SetLabels (const char *[])
 Set the labels for all the slices.
 
void SetLabelsOffset (Float_t)
 Set the distance between the label end the external line of the TPie.
 
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).
 
void SetPercentFormat (const char *)
 Set the numeric format for the percent value of a slice, default: %3.1f.
 
void SetRadius (Double_t)
 Set the pie chart's radius' value.
 
virtual void SetTextAlign (Short_t align=11)
 Set the text alignment.
 
virtual void SetTextAngle (Float_t tangle=0)
 Set the text angle.
 
virtual void SetTextAttributes ()
 Invoke the DialogCanvas Text attributes.
 
virtual void SetTextColor (Color_t tcolor=1)
 Set the text color.
 
void SetTextColor (TColorNumber lcolor)
 
virtual void SetTextColorAlpha (Color_t tcolor, Float_t talpha)
 Set a transparent text color.
 
virtual void SetTextFont (Font_t tfont=62)
 Set the text font.
 
virtual void SetTextSize (Float_t tsize=1)
 Set the text size.
 
virtual void SetTextSizePixels (Int_t npixels)
 Set the text size in pixel.
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed.
 
virtual void SetUniqueID (UInt_t uid)
 Set the unique object id.
 
void SetValueFormat (const char *)
 Set the numeric format the slices' values.
 
void SetX (Double_t)
 Set X value.
 
void SetY (Double_t)
 Set Y value.
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject.
 
void SortSlices (Bool_t amode=kTRUE, Float_t merge_thresold=.0)
 This method, mainly intended for internal use, ordered the slices according their values.
 
void Streamer (TBuffer &) override
 Stream an object of class TObject.
 
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)
 
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=nullptr, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory.
 
virtual Int_t Write (const char *name=nullptr, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory.
 

Static Public Member Functions

static TClassClass ()
 
static const char * Class_Name ()
 
static constexpr Version_t Class_Version ()
 
static const char * DeclFileName ()
 
static Longptr_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 Types

enum  { kOnlyPrepStep = (1ULL << ( 3 )) }
 

Protected Member Functions

virtual void DoError (int level, const char *location, const char *fmt, va_list va) const
 Interface to ErrorHandler (protected).
 
void MakeZombie ()
 
void SavePrimitiveNameTitle (std::ostream &out, const char *variable_name)
 Save object name and title into the output stream "out".
 

Static Protected Member Functions

static void SavePrimitiveConstructor (std::ostream &out, TClass *cl, const char *variable_name, const char *constructor_agrs="", Bool_t empty_line=kTRUE)
 Save object constructor in the output stream "out".
 
static void SavePrimitiveDraw (std::ostream &out, const char *variable_name, Option_t *option=nullptr)
 Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.
 
static TString SavePrimitiveVector (std::ostream &out, const char *prefix, Int_t len, Double_t *arr, Int_t flag=0)
 Save array in the output stream "out" as vector.
 

Protected Attributes

Float_t fAngle3D
 The angle of the pseudo-3d view.
 
Double_t fAngularOffset
 Offset angular offset for the first slice.
 
TString fFractionFormat
 Rform numeric format for the fraction of a slice.
 
Double_t fHeight
 Height of the slice in pixel.
 
Bool_t fIs3D
 ! true if the pseudo-3d is enabled
 
TString fLabelFormat
 Format format of the slices' label.
 
Float_t fLabelsOffset
 LabelsOffset offset of label.
 
TString fName
 
Int_t fNvals
 Number of elements.
 
TString fPercentFormat
 Pfrom numeric format for the percent of a slice.
 
TPieSlice ** fPieSlices {nullptr}
 [fNvals] Slice array of this pie-chart
 
Double_t fRadius
 Radius Pie radius.
 
Short_t fTextAlign
 Text alignment.
 
Float_t fTextAngle
 Text angle.
 
Color_t fTextColor
 Text color.
 
Font_t fTextFont
 Text font.
 
Float_t fTextSize
 Text size.
 
TString fTitle
 
TString fValueFormat
 Vform numeric format for the value.
 
Double_t fX
 X coordinate of the pie centre.
 
Double_t fY
 Y coordinate of the pie centre.
 

Private Member Functions

void DrawGhost ()
 This method is for internal use.
 
void Init (Int_t np, Double_t ao, Double_t x, Double_t y, Double_t r)
 Common initialization for all constructors.
 

Static Private Member Functions

static void AddToTObjectTable (TObject *)
 Private helper function which will dispatch to TObjectTable::AddObj.
 

Private Attributes

UInt_t fBits
 bit field status word
 
TLegendfLegend {nullptr}
 !Legend for this piechart
 
Float_tfSlices {nullptr}
 !Subdivisions of the slices
 
Float_t fSum
 !Sum for the slice values
 
UInt_t fUniqueID
 object unique identifier
 

Static Private Attributes

static Longptr_t fgDtorOnly = 0
 object for which to call dtor only (i.e. no delete)
 
static Bool_t fgObjectStat = kTRUE
 if true keep track of objects in TObjectTable
 

#include <TPie.h>

Inheritance diagram for TPie:
TNamed TAttText TObject

Member Enumeration Documentation

◆ anonymous enum

anonymous enum
inherited
Enumerator
kIsOnHeap 

object is on heap

kNotDeleted 

object has not been deleted

kZombie 

object ctor failed

kInconsistent 

class overload Hash but does call RecursiveRemove in destructor

kBitMask 

Definition at line 89 of file TObject.h.

◆ anonymous enum

anonymous enum
inherited
Enumerator
kSingleKey 

write collection with single key

kOverwrite 

overwrite existing object with same name

kWriteDelete 

write object, then delete previous key with same name

Definition at line 99 of file TObject.h.

◆ anonymous enum

anonymous enum
protectedinherited
Enumerator
kOnlyPrepStep 

Used to request that the class specific implementation of TObject::Write just prepare the objects to be ready to be written but do not actually write them into the TBuffer.

This is just for example by TBufferMerger to request that the TTree inside the file calls TTree::FlushBaskets (outside of the merging lock) and TBufferMerger will later ask for the write (inside the merging lock). To take advantage of this feature the class needs to overload TObject::Write and use this enum value accordingly. (See TTree::Write and TObject::Write) Do not use, this feature will be migrate to the Merge function (See TClass and TTree::Merge)

Definition at line 106 of file TObject.h.

◆ EDeprecatedStatusBits

Enumerator
kObjInCanvas 

for backward compatibility only, use kMustCleanup

Definition at line 84 of file TObject.h.

◆ EStatusBits

Enumerator
kCanDelete 

if object in a list can be deleted

kMustCleanup 

if object destructor must call RecursiveRemove()

kIsReferenced 

if object is referenced by a TRef or TRefArray

kHasUUID 

if object has a TUUID (its fUniqueID=UUIDNumber)

kCannotPick 

if object in a pad cannot be picked

kNoContextMenu 

if object does not want context menu

kInvalidObject 

if object ctor succeeded but object should not be used

Definition at line 70 of file TObject.h.

Constructor & Destructor Documentation

◆ TPie() [1/6]

TPie::TPie ( )

Default constructor.

Definition at line 119 of file TPie.cxx.

◆ TPie() [2/6]

TPie::TPie ( const char * name,
const char * title,
Int_t npoints )

This constructor creates a pie chart when only the number of the slices is known.

The number of slices is fixed.

Definition at line 128 of file TPie.cxx.

◆ TPie() [3/6]

TPie::TPie ( const char * name,
const char * title,
Int_t npoints,
Double_t * vals,
Int_t * colors = nullptr,
const char * lbls[] = nullptr )

Normal constructor.

The 1st and 2nd parameters are the name of the object and its title.

The number of points passed at this point is used to allocate the memory.

Slices values are given as Double_t.

The 4th elements is an array containing, in double precision format, the value of each slice. It is also possible to specify the filled color of each slice. If the color array is not specified the slices are colored using a color sequence in the standard palette.

Definition at line 147 of file TPie.cxx.

◆ TPie() [4/6]

TPie::TPie ( const char * name,
const char * title,
Int_t npoints,
Float_t * vals,
Int_t * cols = nullptr,
const char * lbls[] = nullptr )

Normal constructor (Float_t).

Definition at line 161 of file TPie.cxx.

◆ TPie() [5/6]

TPie::TPie ( const TH1 * h)

Constructor from a TH1.

Definition at line 176 of file TPie.cxx.

◆ TPie() [6/6]

TPie::TPie ( const TPie & cpy)

Copy constructor.

Definition at line 200 of file TPie.cxx.

◆ ~TPie()

TPie::~TPie ( )
override

Destructor.

Definition at line 211 of file TPie.cxx.

Member Function Documentation

◆ AbstractMethod()

void TObject::AbstractMethod ( const char * method) const
inherited

Call this function within a function that you don't want to define as purely virtual, in order not to force all users deriving from that class to implement that maybe (on their side) unused function; but at the same time, emit a run-time warning if they try to call it, telling that it is not implemented in the derived class: action must thus be taken on the user side to override it.

In other word, this method acts as a "runtime purely virtual" warning instead of a "compiler purely virtual" error.

Warning
This interface is a legacy function that is no longer recommended to be used by new development code.
Note
The name "AbstractMethod" does not imply that it's an abstract method in the strict C++ sense.

Definition at line 1149 of file TObject.cxx.

◆ AddToTObjectTable()

void TObject::AddToTObjectTable ( TObject * op)
staticprivateinherited

Private helper function which will dispatch to TObjectTable::AddObj.

Included here to avoid circular dependency between header files.

Definition at line 195 of file TObject.cxx.

◆ AppendPad()

void TObject::AppendPad ( Option_t * option = "")
virtualinherited

Append graphics object to current pad.

In case no current pad is set yet, create a default canvas with the name "c1".

Definition at line 204 of file TObject.cxx.

◆ Browse()

◆ CheckedHash()

ULong_t TObject::CheckedHash ( )
inlineinherited

Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object.

The intent is for this routine to be called instead of directly calling the function Hash during "insert" operations. See TObject::HasInconsistenTObjectHash();

(*) The setup is consistent when all classes in the class hierarchy that overload TObject::Hash do call ROOT::CallRecursiveRemoveIfNeeded in their destructor. i.e. it is safe to call the Hash virtual function during the RecursiveRemove operation.

Definition at line 332 of file TObject.h.

◆ Class()

static TClass * TPie::Class ( )
static
Returns
TClass describing this class

◆ Class_Name()

static const char * TPie::Class_Name ( )
static
Returns
Name of this class

◆ Class_Version()

static constexpr Version_t TPie::Class_Version ( )
inlinestaticconstexpr
Returns
Version of this class

Definition at line 111 of file TPie.h.

◆ ClassName()

const char * TObject::ClassName ( ) const
virtualinherited

Returns name of class to which the object belongs.

Definition at line 227 of file TObject.cxx.

◆ Clear()

void TNamed::Clear ( Option_t * option = "")
overridevirtualinherited

Set name and title to empty strings ("").

Reimplemented from TObject.

Reimplemented in TStreamerInfo, TVirtualStreamerInfo, TProcessID, TTask, TPrincipal, and TVirtualFitter.

Definition at line 63 of file TNamed.cxx.

◆ Clone()

TObject * TNamed::Clone ( const char * newname = "") const
overridevirtualinherited

Make a clone of an object using the Streamer facility.

If newname is specified, this will be the name of the new object.

Reimplemented from TObject.

Reimplemented in TStreamerInfo, and TTreeIndex.

Definition at line 73 of file TNamed.cxx.

◆ Compare()

Int_t TNamed::Compare ( const TObject * obj) const
overridevirtualinherited

Compare two TNamed objects.

Returns 0 when equal, -1 when this is smaller and +1 when bigger (like strcmp).

Reimplemented from TObject.

Reimplemented in TStructNodeProperty.

Definition at line 84 of file TNamed.cxx.

◆ Copy() [1/2]

void TAttText::Copy ( TAttText & atttext) const
inherited

Copy this text attributes to a new TAttText.

Definition at line 300 of file TAttText.cxx.

◆ Copy() [2/2]

void TNamed::Copy ( TObject & named) const
overridevirtualinherited

Copy this to obj.

Reimplemented from TObject.

Reimplemented in TSystemDirectory, TSystemFile, TProfile, TProfile2D, TProfile3D, TPieSlice, TStyle, TText, and TXTRU.

Definition at line 93 of file TNamed.cxx.

◆ DeclFileName()

static const char * TPie::DeclFileName ( )
inlinestatic
Returns
Name of the file containing the class declaration

Definition at line 111 of file TPie.h.

◆ Delete()

void TObject::Delete ( Option_t * option = "")
virtualinherited

◆ DistancetoPrimitive()

Int_t TPie::DistancetoPrimitive ( Int_t px,
Int_t py )
overridevirtual

Evaluate the distance to the chart in gPad.

Reimplemented from TObject.

Definition at line 225 of file TPie.cxx.

◆ DistancetoSlice()

Int_t TPie::DistancetoSlice ( Int_t px,
Int_t py )

Returns the slice number at the pixel position (px,py).

Returns -1 if no slice is picked.

Used by DistancetoPrimitive.

Definition at line 245 of file TPie.cxx.

◆ DoError()

void TObject::DoError ( int level,
const char * location,
const char * fmt,
va_list va ) const
protectedvirtualinherited

Interface to ErrorHandler (protected).

Reimplemented in TTreeViewer, and TThread.

Definition at line 1059 of file TObject.cxx.

◆ Draw()

void TPie::Draw ( Option_t * option = "l")
overridevirtual

Draw the pie chart.

The possible options are listed in the TPie::Paint() method.

Reimplemented from TObject.

Definition at line 332 of file TPie.cxx.

◆ DrawClass()

void TObject::DrawClass ( ) const
virtualinherited

Draw class inheritance tree of the class to which this object belongs.

If a class B inherits from a class A, description of B is drawn on the right side of description of A. Member functions overridden by B are shown in class A with a blue line crossing-out the corresponding member function. The following picture is the class inheritance tree of class TPaveLabel:

Reimplemented in TSystemDirectory, TSystemFile, and TGFrame.

Definition at line 308 of file TObject.cxx.

◆ DrawClone()

TObject * TObject::DrawClone ( Option_t * option = "") const
virtualinherited

Draw a clone of this object in the current selected pad with: gROOT->SetSelectedPad(c1).

If pad was not selected - gPad will be used.

Note
For histograms, use the more specialised TH1::DrawCopy().

Reimplemented in TSystemDirectory, TSystemFile, TGFrame, TAxis, and TCanvas.

Definition at line 319 of file TObject.cxx.

◆ DrawGhost()

void TPie::DrawGhost ( )
private

This method is for internal use.

It is used by Execute event to draw the outline of "this" TPie. Used when the opaque movements are not permitted.

Definition at line 355 of file TPie.cxx.

◆ Dump()

void TObject::Dump ( ) const
virtualinherited

Dump contents of object on stdout.

Using the information in the object dictionary (class TClass) each data member is interpreted. If a data member is a pointer, the pointer value is printed

The following output is the Dump of a TArrow object:

fAngle 0 Arrow opening angle (degrees)
fArrowSize 0.2 Arrow Size
fOption.*fData
fX1 0.1 X of 1st point
fY1 0.15 Y of 1st point
fX2 0.67 X of 2nd point
fY2 0.83 Y of 2nd point
fBits 50331648 bit field status word
fLineColor 1 line color
fLineStyle 1 line style
fLineWidth 1 line width
fFillColor 19 fill area color
fFillStyle 1001 fill area style
#define X(type, name)
Option_t Option_t TPoint TPoint angle
Option_t Option_t width
Option_t Option_t style
UInt_t fUniqueID
object unique identifier
Definition TObject.h:46
UInt_t fBits
bit field status word
Definition TObject.h:47
TLine * line

Reimplemented in TSystemFile, TCollection, TClass, TGFrame, and TGPack.

Definition at line 367 of file TObject.cxx.

◆ Error()

void TObject::Error ( const char * location,
const char * fmt,
... ) const
virtualinherited

Issue error message.

Use "location" to specify the method where the error occurred. Accepts standard printf formatting arguments.

Reimplemented in TFitResult.

Definition at line 1098 of file TObject.cxx.

◆ Execute() [1/2]

void TObject::Execute ( const char * method,
const char * params,
Int_t * error = nullptr )
virtualinherited

Execute method on this object with the given parameter string, e.g.

"3.14,1,\"text\"".

Reimplemented in TMethodCall, TCling, TInterpreter, ROOT::R::TRInterface, and TContextMenu.

Definition at line 378 of file TObject.cxx.

◆ Execute() [2/2]

void TObject::Execute ( TMethod * method,
TObjArray * params,
Int_t * error = nullptr )
virtualinherited

Execute method on this object with parameters stored in the TObjArray.

The TObjArray should contain an argv vector like:

argv[0] ... argv[n] = the list of TObjString parameters
Collectable string class.
Definition TObjString.h:28
const Int_t n
Definition legend1.C:16

Reimplemented in TCling, TMethodCall, TInterpreter, ROOT::R::TRInterface, and TContextMenu.

Definition at line 398 of file TObject.cxx.

◆ ExecuteEvent()

void TPie::ExecuteEvent ( Int_t event,
Int_t px,
Int_t py )
overridevirtual

Execute the mouse events.

Reimplemented from TObject.

Definition at line 451 of file TPie.cxx.

◆ Fatal()

void TObject::Fatal ( const char * location,
const char * fmt,
... ) const
virtualinherited

Issue fatal error message.

Use "location" to specify the method where the fatal error occurred. Accepts standard printf formatting arguments.

Definition at line 1126 of file TObject.cxx.

◆ FillBuffer()

void TNamed::FillBuffer ( char *& buffer)
virtualinherited

Encode TNamed into output buffer.

Reimplemented in TKeySQL, TSQLFile, TKeyXML, TXMLFile, TDirectoryFile, TFile, and TKey.

Definition at line 103 of file TNamed.cxx.

◆ FindObject() [1/2]

TObject * TObject::FindObject ( const char * name) const
virtualinherited

Must be redefined in derived classes.

This function is typically used with TCollections, but can also be used to find an object by name inside this object.

Reimplemented in TListOfEnums, TMap, TDirectory, TFolder, TROOT, TListOfTypes, TListOfTypes, TBtree, TCollection, THashList, THashTable, TList, TObjArray, TListOfDataMembers, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TListOfFunctionTemplates, TViewPubDataMembers, TViewPubFunctions, TPad, TGeometry, THbookFile, TGraph, TGraph2D, TH1, RooAbsCollection, and RooLinkedList.

Definition at line 425 of file TObject.cxx.

◆ FindObject() [2/2]

TObject * TObject::FindObject ( const TObject * obj) const
virtualinherited

Must be redefined in derived classes.

This function is typically used with TCollections, but can also be used to find an object inside this object.

Reimplemented in TMap, TDirectory, TFolder, TROOT, TListOfTypes, TBtree, TCollection, THashList, THashTable, TList, TObjArray, TListOfDataMembers, TListOfEnums, TListOfEnumsWithLock, TListOfFunctions, TListOfFunctionTemplates, TViewPubDataMembers, TViewPubFunctions, TPad, TGeometry, THbookFile, TGraph, TGraph2D, TH1, RooAbsCollection, and RooLinkedList.

Definition at line 435 of file TObject.cxx.

◆ GetAngle3D()

Float_t TPie::GetAngle3D ( )
inline

Definition at line 61 of file TPie.h.

◆ GetAngularOffset()

Double_t TPie::GetAngularOffset ( )
inline

Definition at line 62 of file TPie.h.

◆ GetDrawOption()

Option_t * TObject::GetDrawOption ( ) const
virtualinherited

Get option used by the graphics system to draw this object.

Note that before calling object.GetDrawOption(), you must have called object.Draw(..) before in the current pad.

Reimplemented in TBrowser, TFitEditor, TGedFrame, TGFileBrowser, TRootBrowser, and TRootBrowserLite.

Definition at line 445 of file TObject.cxx.

◆ GetDtorOnly()

Longptr_t TObject::GetDtorOnly ( )
staticinherited

Return destructor only flag.

Definition at line 1196 of file TObject.cxx.

◆ GetEntries()

Int_t TPie::GetEntries ( )
inline

Definition at line 76 of file TPie.h.

◆ GetEntryFillColor()

Int_t TPie::GetEntryFillColor ( Int_t i)

Return the color of the slice number "i".

Definition at line 703 of file TPie.cxx.

◆ GetEntryFillStyle()

Int_t TPie::GetEntryFillStyle ( Int_t i)

Return the style use to fill the slice number "i".

Definition at line 711 of file TPie.cxx.

◆ GetEntryLabel()

const char * TPie::GetEntryLabel ( Int_t i)

Returns the label of the entry number "i".

Definition at line 695 of file TPie.cxx.

◆ GetEntryLineColor()

Int_t TPie::GetEntryLineColor ( Int_t i)

Return the line color used to outline thi "i" slice.

Definition at line 719 of file TPie.cxx.

◆ GetEntryLineStyle()

Int_t TPie::GetEntryLineStyle ( Int_t i)

Return the style used to outline thi "i" slice.

Definition at line 727 of file TPie.cxx.

◆ GetEntryLineWidth()

Int_t TPie::GetEntryLineWidth ( Int_t i)

Return the line width used to outline thi "i" slice.

Definition at line 735 of file TPie.cxx.

◆ GetEntryRadiusOffset()

Double_t TPie::GetEntryRadiusOffset ( Int_t i)

Return the radial offset's value for the slice number "i".

Definition at line 743 of file TPie.cxx.

◆ GetEntryVal()

Double_t TPie::GetEntryVal ( Int_t i)

Return the value associated with the slice number "i".

Definition at line 751 of file TPie.cxx.

◆ GetFractionFormat()

const char * TPie::GetFractionFormat ( )
inline

Definition at line 71 of file TPie.h.

◆ GetHeight()

Double_t TPie::GetHeight ( )
inline

Definition at line 72 of file TPie.h.

◆ GetIconName()

const char * TObject::GetIconName ( ) const
virtualinherited

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 in TSystemFile, TGeoVolume, TASImage, TGMainFrame, TKey, ROOT::Experimental::XRooFit::xRooNode, TBranch, TVirtualBranchBrowsable, TMethodBrowsable, and TBranchElement.

Definition at line 472 of file TObject.cxx.

◆ GetLabelFormat()

const char * TPie::GetLabelFormat ( )
inline

Definition at line 73 of file TPie.h.

◆ GetLabelsOffset()

Float_t TPie::GetLabelsOffset ( )
inline

Definition at line 74 of file TPie.h.

◆ GetLegend()

TLegend * TPie::GetLegend ( )

If created before by Paint option or by MakeLegend method return the pointer to the legend, otherwise return 0;.

Definition at line 760 of file TPie.cxx.

◆ GetName()

const char * TNamed::GetName ( ) const
inlineoverridevirtualinherited

Returns name of object.

This default method returns the class name. Classes that give objects a name should override this method.

Reimplemented from TObject.

Definition at line 49 of file TNamed.h.

◆ GetObjectInfo()

char * TObject::GetObjectInfo ( Int_t px,
Int_t py ) const
virtualinherited

Returns string containing info about the object at position (px,py).

This method is typically overridden by classes of which the objects can report peculiarities for different positions. Returned string will be re-used (lock in MT environment).

Reimplemented in TGeoNode, TGeoVolume, TGeoTrack, TASImage, TColorWheel, TAxis3D, TNode, TGL5DDataSet, TGLHistPainter, TGLParametricEquation, TGLTH3Composition, TF1, TF2, TGraph, TH1, THistPainter, TPaletteAxis, TFileDrawMap, TParallelCoordVar, and TVirtualHistPainter.

Definition at line 491 of file TObject.cxx.

◆ GetObjectStat()

Bool_t TObject::GetObjectStat ( )
staticinherited

Get status of object stat flag.

Definition at line 1181 of file TObject.cxx.

◆ GetOption()

virtual Option_t * TObject::GetOption ( ) const
inlinevirtualinherited

◆ GetPercentFormat()

const char * TPie::GetPercentFormat ( )
inline

Definition at line 77 of file TPie.h.

◆ GetRadius()

Double_t TPie::GetRadius ( )
inline

Definition at line 78 of file TPie.h.

◆ GetSlice()

TPieSlice * TPie::GetSlice ( Int_t id)

Return the reference to the slice of index 'id'.

There are no controls of memory corruption, be carefull.

Definition at line 769 of file TPie.cxx.

◆ GetTextAlign()

virtual Short_t TAttText::GetTextAlign ( ) const
inlinevirtualinherited

Return the text alignment.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 35 of file TAttText.h.

◆ GetTextAngle()

virtual Float_t TAttText::GetTextAngle ( ) const
inlinevirtualinherited

Return the text angle.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 36 of file TAttText.h.

◆ GetTextColor()

virtual Color_t TAttText::GetTextColor ( ) const
inlinevirtualinherited

Return the text color.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 37 of file TAttText.h.

◆ GetTextFont()

virtual Font_t TAttText::GetTextFont ( ) const
inlinevirtualinherited

Return the text font.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 38 of file TAttText.h.

◆ GetTextSize()

virtual Float_t TAttText::GetTextSize ( ) const
inlinevirtualinherited

Return the text size.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 39 of file TAttText.h.

◆ GetTextSizePercent()

Float_t TAttText::GetTextSizePercent ( Float_t size)
virtualinherited

Return the text in percent of the pad size.

Return the text size in percent of the pad size.

If the font precision is greater than 2, the text size returned is the size in pixel converted into percent of the pad size, otherwise the size returned is the same as the size given as input parameter.

Definition at line 316 of file TAttText.cxx.

◆ GetTextSizePixels()

Float_t TAttText::GetTextSizePixels ( TVirtualPad & pad) const
virtualinherited

Return the text size in pixels for specified pad.

Return the text size in pixels for the specified pad.

If the font precision less than 3 size defined as percent of pad size and scaled to minimal pad size

Definition at line 350 of file TAttText.cxx.

◆ GetTextSizeRelative()

Float_t TAttText::GetTextSizeRelative ( TVirtualPad & pad) const
virtualinherited

Return the text size in relative units.

If the font precision grater then 2 use pad dimensions to get value

Definition at line 333 of file TAttText.cxx.

◆ GetTitle()

const char * TNamed::GetTitle ( ) const
inlineoverridevirtualinherited

Returns title of object.

This default method returns the class title (i.e. description). Classes that give objects a title should override this method.

Reimplemented from TObject.

Definition at line 50 of file TNamed.h.

◆ GetUniqueID()

UInt_t TObject::GetUniqueID ( ) const
virtualinherited

Return the unique object id.

Definition at line 480 of file TObject.cxx.

◆ GetValueFormat()

const char * TPie::GetValueFormat ( )
inline

Definition at line 80 of file TPie.h.

◆ GetX()

Double_t TPie::GetX ( )
inline

Definition at line 81 of file TPie.h.

◆ GetY()

Double_t TPie::GetY ( )
inline

Definition at line 82 of file TPie.h.

◆ HandleTimer()

Bool_t TObject::HandleTimer ( TTimer * timer)
virtualinherited

Execute action in response of a timer timing out.

This method must be overridden if an object has to react to timers.

Reimplemented in TGWindow, TGuiBldDragManager, TGraphTime, TGLEventHandler, TGCommandPlugin, TGDNDManager, TGFileContainer, TGPopupMenu, TGScrollBar, TGShutter, TGTextEdit, TGTextEditor, TGTextEntry, TGTextView, TGToolTip, TGHtml, and TTreeViewer.

Definition at line 516 of file TObject.cxx.

◆ Hash()

ULong_t TNamed::Hash ( ) const
inlineoverridevirtualinherited

Return hash value for this object.

Note: If this routine is overloaded in a derived class, this derived class should also add

void CallRecursiveRemoveIfNeeded(TObject &obj)
call RecursiveRemove for obj if gROOT is valid and obj.TestBit(kMustCleanup) is true.
Definition TROOT.h:406

Otherwise, when RecursiveRemove is called (by ~TObject or example) for this type of object, the transversal of THashList and THashTable containers will will have to be done without call Hash (and hence be linear rather than logarithmic complexity). You will also see warnings like

ULong_t Hash() const override
Return hash value for this object.
Definition TNamed.h:51
Mother of all ROOT objects.
Definition TObject.h:42
virtual void Error(const char *method, const char *msgfmt,...) const
Issue error message.
Definition TObject.cxx:1098
void RecursiveRemove(TObject *obj) override
Recursively remove this object from the list of Cleanups.
Definition TROOT.cxx:2651

Reimplemented from TObject.

Definition at line 51 of file TNamed.h.

◆ HasInconsistentHash()

Bool_t TObject::HasInconsistentHash ( ) const
inlineinherited

Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e.

missing call to RecursiveRemove in destructor).

Note: Since the consistency is only tested for during inserts, this routine will return true for object that have never been inserted whether or not they have a consistent setup. This has no negative side-effect as searching for the object with the right or wrong Hash will always yield a not-found answer (Since anyway no hash can be guaranteed unique, there is always a check)

Definition at line 366 of file TObject.h.

◆ Info()

void TObject::Info ( const char * location,
const char * fmt,
... ) const
virtualinherited

Issue info message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1072 of file TObject.cxx.

◆ InheritsFrom() [1/2]

Bool_t TObject::InheritsFrom ( const char * classname) const
virtualinherited

Returns kTRUE if object inherits from class "classname".

Reimplemented in TClass.

Definition at line 549 of file TObject.cxx.

◆ InheritsFrom() [2/2]

Bool_t TObject::InheritsFrom ( const TClass * cl) const
virtualinherited

Returns kTRUE if object inherits from TClass cl.

Reimplemented in TClass.

Definition at line 557 of file TObject.cxx.

◆ Init()

void TPie::Init ( Int_t np,
Double_t ao,
Double_t x,
Double_t y,
Double_t r )
private

Common initialization for all constructors.

This is a private function called to allocate the memory.

Definition at line 778 of file TPie.cxx.

◆ Inspect()

void TObject::Inspect ( ) const
virtualinherited

Dump contents of this object in a graphics canvas.

Same action as Dump but in a graphical form. In addition pointers to other objects can be followed.

The following picture is the Inspect of a histogram object:

Reimplemented in TSystemFile, TInspectorObject, TGFrame, and ROOT::Experimental::XRooFit::xRooNode.

Definition at line 570 of file TObject.cxx.

◆ InvertBit()

void TObject::InvertBit ( UInt_t f)
inlineinherited

Definition at line 206 of file TObject.h.

◆ IsA()

TClass * TPie::IsA ( ) const
inlineoverridevirtual
Returns
TClass describing current object

Reimplemented from TNamed.

Definition at line 111 of file TPie.h.

◆ IsDestructed()

Bool_t TObject::IsDestructed ( ) const
inlineinherited

IsDestructed.

Note
This function must be non-virtual as it can be used on destructed (but not yet modified) memory. This is used for example in TClonesArray to record the element that have been destructed but not deleted and thus are ready for re-use (by operator new with placement).
Returns
true if this object's destructor has been run.

Definition at line 186 of file TObject.h.

◆ IsEqual()

Bool_t TObject::IsEqual ( const TObject * obj) const
virtualinherited

Default equal comparison (objects are equal if they have the same address in memory).

More complicated classes might want to override this function.

Reimplemented in TObjString, TQCommand, TPair, and TGObject.

Definition at line 589 of file TObject.cxx.

◆ IsFolder()

◆ IsOnHeap()

R__ALWAYS_INLINE Bool_t TObject::IsOnHeap ( ) const
inlineinherited

Definition at line 160 of file TObject.h.

◆ IsSortable()

Bool_t TNamed::IsSortable ( ) const
inlineoverridevirtualinherited

Reimplemented from TObject.

Reimplemented in TStructNodeProperty.

Definition at line 52 of file TNamed.h.

◆ IsZombie()

R__ALWAYS_INLINE Bool_t TObject::IsZombie ( ) const
inlineinherited

Definition at line 161 of file TObject.h.

◆ ls()

void TNamed::ls ( Option_t * option = "") const
overridevirtualinherited

List TNamed name and title.

Reimplemented from TObject.

Reimplemented in ROOT::Experimental::XRooFit::xRooBrowser, TVirtualStreamerInfo, TROOT, TStreamerElement, TStreamerBase, TStreamerSTL, TText, TStreamerInfo, TTask, and TNode.

Definition at line 112 of file TNamed.cxx.

◆ MakeLegend()

TLegend * TPie::MakeLegend ( Double_t x1 = .65,
Double_t y1 = .65,
Double_t x2 = .95,
Double_t y2 = .95,
const char * leg_header = "" )

This method create a legend that explains the contents of the slice for this pie-chart.

The parameter passed reppresents the option passed to shown the slices, see TLegend::AddEntry() for further details.

The pointer of the TLegend is returned.

Definition at line 828 of file TPie.cxx.

◆ MakeSlices()

void TPie::MakeSlices ( Bool_t force = kFALSE)

Make the slices.

If they already exist it does nothing unless force=kTRUE.

Definition at line 1409 of file TPie.cxx.

◆ MakeZombie()

void TObject::MakeZombie ( )
inlineprotectedinherited

Definition at line 55 of file TObject.h.

◆ MayNotUse()

void TObject::MayNotUse ( const char * method) const
inherited

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).

Definition at line 1160 of file TObject.cxx.

◆ Modify()

void TAttText::Modify ( )
virtualinherited

Change current text attributes if necessary.

Definition at line 364 of file TAttText.cxx.

◆ ModifyOn()

void TAttText::ModifyOn ( TVirtualPad & pad)
virtualinherited

Change current text attributes if necessary on specified pad.

Definition at line 373 of file TAttText.cxx.

◆ Notify()

Bool_t TObject::Notify ( )
virtualinherited

This method must be overridden to handle object notification (the base implementation is no-op).

Different objects in ROOT use the Notify method for different purposes, in coordination with other objects that call this method at the appropriate time.

For example, TLeaf uses it to load class information; TBranchRef to load contents of referenced branches TBranchRef; most notably, based on Notify, TChain implements a callback mechanism to inform interested parties when it switches to a new sub-tree.

Reimplemented in TMessageHandler, TNotifyLink< Type >, TNotifyLink< RNoCleanupNotifierHelper >, TNotifyLink< ROOT::Detail::TBranchProxy >, TNotifyLink< TTreeReader >, TFileHandler, TSignalHandler, TStdExceptionHandler, TProcessEventTimer, TTimer, TIdleTimer, TSingleShotCleaner, TCollection, TRefTable, TBrowserTimer, TInterruptHandler, TTermInputHandler, TThreadTimer, TGLRedrawTimer, TViewTimer, TGContainerKeyboardTimer, TGContainerScrollTimer, TGInputHandler, TViewUpdateTimer, TPopupDelayTimer, TRepeatTimer, TSBRepeatTimer, TGTextEditHist, TInsCharCom, TDelCharCom, TBreakLineCom, TInsTextCom, TDelTextCom, TBlinkTimer, TTipDelayTimer, TGuiBldDragManagerRepeatTimer, TARInterruptHandler, TASLogHandler, TASInterruptHandler, TASSigPipeHandler, TASInputHandler, TSocketHandler, TTimeOutTimer, TBranchElement, TBranchRef, TLeafObject, TSelector, TTree, TSelectorDraw, TSelectorEntries, TTreeFormula, TTreeFormulaManager, TTreeReader, h1analysis, h1analysisTreeReader, and TSysEvtHandler.

Definition at line 618 of file TObject.cxx.

◆ Obsolete()

void TObject::Obsolete ( const char * method,
const char * asOfVers,
const char * removedFromVers ) const
inherited

Use this method to declare a method obsolete.

Specify as of which version the method is obsolete and as from which version it will be removed.

Definition at line 1169 of file TObject.cxx.

◆ operator delete() [1/3]

void TObject::operator delete ( void * ptr,
size_t size )
inherited

Operator delete for sized deallocation.

Definition at line 1234 of file TObject.cxx.

◆ operator delete() [2/3]

void TObject::operator delete ( void * ptr)
inherited

Operator delete.

Definition at line 1212 of file TObject.cxx.

◆ operator delete() [3/3]

void TObject::operator delete ( void * ptr,
void * vp )
inherited

Only called by placement new when throwing an exception.

Definition at line 1266 of file TObject.cxx.

◆ operator delete[]() [1/3]

void TObject::operator delete[] ( void * ptr,
size_t size )
inherited

Operator delete [] for sized deallocation.

Definition at line 1245 of file TObject.cxx.

◆ operator delete[]() [2/3]

void TObject::operator delete[] ( void * ptr)
inherited

Operator delete [].

Definition at line 1223 of file TObject.cxx.

◆ operator delete[]() [3/3]

void TObject::operator delete[] ( void * ptr,
void * vp )
inherited

Only called by placement new[] when throwing an exception.

Definition at line 1274 of file TObject.cxx.

◆ operator new() [1/2]

void * TObject::operator new ( size_t sz)
inlineinherited

Definition at line 189 of file TObject.h.

◆ operator new() [2/2]

void * TObject::operator new ( size_t sz,
void * vp )
inlineinherited

Definition at line 191 of file TObject.h.

◆ operator new[]() [1/2]

void * TObject::operator new[] ( size_t sz)
inlineinherited

Definition at line 190 of file TObject.h.

◆ operator new[]() [2/2]

void * TObject::operator new[] ( size_t sz,
void * vp )
inlineinherited

Definition at line 192 of file TObject.h.

◆ Paint()

void TPie::Paint ( Option_t * option)
overridevirtual

Paint a Pie chart in a canvas.

See the class description for the possible drawing options

Reimplemented from TObject.

Definition at line 846 of file TPie.cxx.

◆ Pop()

void TObject::Pop ( )
virtualinherited

Pop on object drawn in a pad to the top of the display list.

I.e. it will be drawn last and on top of all other primitives.

Reimplemented in TPad, TFrame, and TVirtualPad.

Definition at line 640 of file TObject.cxx.

◆ Print()

◆ Read()

Int_t TObject::Read ( const char * name)
virtualinherited

Read contents of object with specified name from the current directory.

First the key with the given name is searched in the current directory, next the key buffer is deserialized into the object. The object must have been created before via the default constructor. See TObject::Write().

Reimplemented in TKeyXML, TBuffer, TKey, and TKeySQL.

Definition at line 673 of file TObject.cxx.

◆ RecursiveRemove()

◆ ResetAttText()

void TAttText::ResetAttText ( Option_t * toption = "")
virtualinherited

Reset this text attributes to default values.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 387 of file TAttText.cxx.

◆ ResetBit()

void TObject::ResetBit ( UInt_t f)
inlineinherited

Definition at line 203 of file TObject.h.

◆ SaveAs()

void TObject::SaveAs ( const char * filename = "",
Option_t * option = "" ) const
virtualinherited

Save this object in the file specified by filename.

  • if "filename" contains ".root" the object is saved in filename as root binary file.
  • if "filename" contains ".xml" the object is saved in filename as a xml ascii file.
  • if "filename" contains ".cc" the object is saved in filename as C code independent from ROOT. The code is generated via SavePrimitive(). Specific code should be implemented in each object to handle this option. Like in TF1::SavePrimitive().
  • otherwise the object is written to filename as a CINT/C++ script. The C++ code to rebuild this object is generated via SavePrimitive(). The "option" parameter is passed to SavePrimitive. By default it is an empty string. It can be used to specify the Draw option in the code generated by SavePrimitive.

    The function is available via the object context menu.

Reimplemented in TSpline, TFolder, TGeoVolume, TClassTree, TPad, TPaveClass, TGObject, TSpline3, TSpline5, ROOT::Experimental::XRooFit::xRooNode, TTreePerfStats, TVirtualPad, TGraph, and TH1.

Definition at line 708 of file TObject.cxx.

◆ SavePrimitive()

void TPie::SavePrimitive ( std::ostream & out,
Option_t * opts = "" )
overridevirtual

Save primitive as a C++ statement(s) on output stream out.

Reimplemented from TObject.

Definition at line 1162 of file TPie.cxx.

◆ SavePrimitiveConstructor()

void TObject::SavePrimitiveConstructor ( std::ostream & out,
TClass * cl,
const char * variable_name,
const char * constructor_agrs = "",
Bool_t empty_line = kTRUE )
staticprotectedinherited

Save object constructor in the output stream "out".

Can be used as first statement when implementing SavePrimitive() method for the object

Definition at line 777 of file TObject.cxx.

◆ SavePrimitiveDraw()

void TObject::SavePrimitiveDraw ( std::ostream & out,
const char * variable_name,
Option_t * option = nullptr )
staticprotectedinherited

Save invocation of primitive Draw() method Skipped if option contains "nodraw" string.

Definition at line 845 of file TObject.cxx.

◆ SavePrimitiveNameTitle()

void TNamed::SavePrimitiveNameTitle ( std::ostream & out,
const char * variable_name )
protectedinherited

Save object name and title into the output stream "out".

Definition at line 135 of file TNamed.cxx.

◆ SavePrimitiveVector()

TString TObject::SavePrimitiveVector ( std::ostream & out,
const char * prefix,
Int_t len,
Double_t * arr,
Int_t flag = 0 )
staticprotectedinherited

Save array in the output stream "out" as vector.

Create unique variable name based on prefix value Returns name of vector which can be used in constructor or in other places of C++ code If flag === kTRUE, just add empty line If flag === 111, check if array is empty and return nullptr or <vectorname>.data()

Definition at line 796 of file TObject.cxx.

◆ SaveTextAttributes()

void TAttText::SaveTextAttributes ( std::ostream & out,
const char * name,
Int_t alidef = 12,
Float_t angdef = 0,
Int_t coldef = 1,
Int_t fondef = 61,
Float_t sizdef = 1 )
virtualinherited

Save text attributes as C++ statement(s) on output stream out.

Definition at line 399 of file TAttText.cxx.

◆ SetAngle3D()

void TPie::SetAngle3D ( Float_t val = 30.)

Set the value of for the pseudo 3D view angle, in degree.

The range of the permitted values is: [0,90]

Definition at line 1188 of file TPie.cxx.

◆ SetAngularOffset()

void TPie::SetAngularOffset ( Double_t offset)

Set the global angular offset for slices in degree [0,360].

Definition at line 1201 of file TPie.cxx.

◆ SetBit() [1/2]

void TObject::SetBit ( UInt_t f)
inlineinherited

Definition at line 202 of file TObject.h.

◆ SetBit() [2/2]

void TObject::SetBit ( UInt_t f,
Bool_t set )
inherited

Set or unset the user status bits as specified in f.

Definition at line 888 of file TObject.cxx.

◆ SetCircle()

void TPie::SetCircle ( Double_t x = .5,
Double_t y = .5,
Double_t rad = .4 )

Set the coordinates of the circle that describe the pie:

  • the 1st and the 2nd arguments are the x and y center's coordinates.
  • the 3rd value is the pie-chart's radius.

All the coordinates are in NDC space.

Definition at line 1218 of file TPie.cxx.

◆ SetDrawOption()

void TObject::SetDrawOption ( Option_t * option = "")
virtualinherited

Set drawing option for object.

This option only affects the drawing style and is stored in the option field of the TObjOptLink supporting a TPad's primitive list (TList). Note that it does not make sense to call object.SetDrawOption(option) before having called object.Draw().

Reimplemented in TSystemDirectory, TSystemFile, TPad, TGFrame, TAxis, TBrowser, TPaveStats, TGedFrame, TRootBrowserLite, and RooPlot.

Definition at line 871 of file TObject.cxx.

◆ SetDtorOnly()

void TObject::SetDtorOnly ( void * obj)
staticinherited

Set destructor only flag.

Definition at line 1204 of file TObject.cxx.

◆ SetEntryFillColor()

void TPie::SetEntryFillColor ( Int_t i,
Int_t color )

Set the color for the slice "i".

Definition at line 1262 of file TPie.cxx.

◆ SetEntryFillStyle()

void TPie::SetEntryFillStyle ( Int_t i,
Int_t style )

Set the fill style for the "i" slice.

Definition at line 1270 of file TPie.cxx.

◆ SetEntryLabel()

void TPie::SetEntryLabel ( Int_t i,
const char * text = "Slice" )

Set slice number "i" label.

The first parameter is the index of the slice, the other is the label text.

Definition at line 1229 of file TPie.cxx.

◆ SetEntryLineColor()

void TPie::SetEntryLineColor ( Int_t i,
Int_t color )

Set the color for the slice's outline. "i" is the slice number.

Definition at line 1238 of file TPie.cxx.

◆ SetEntryLineStyle()

void TPie::SetEntryLineStyle ( Int_t i,
Int_t style )

Set the style for the slice's outline. "i" is the slice number.

Definition at line 1246 of file TPie.cxx.

◆ SetEntryLineWidth()

void TPie::SetEntryLineWidth ( Int_t i,
Int_t width )

Set the width of the slice's outline. "i" is the slice number.

Definition at line 1254 of file TPie.cxx.

◆ SetEntryRadiusOffset()

void TPie::SetEntryRadiusOffset ( Int_t i,
Double_t shift )

Set the distance, in the direction of the radius of the slice.

Definition at line 1278 of file TPie.cxx.

◆ SetEntryVal()

void TPie::SetEntryVal ( Int_t i,
Double_t val )

Set the value of a slice.

Definition at line 1286 of file TPie.cxx.

◆ SetFillColors()

void TPie::SetFillColors ( Int_t * colors)

Set the fill colors for all the TPie's slices.

Definition at line 1296 of file TPie.cxx.

◆ SetFractionFormat()

void TPie::SetFractionFormat ( const char * fmt)

Set numeric format in the label, is used if the label format there is the modifier frac, in this case the value is printed using this format.

The numeric format use the standard C modifier used in stdio library: f, %2.1$, e... for further documentation you can use the printf man page ("man 3 printf" on linux)

Example:

mypie->SetLabelFormat("%txt (%frac)");
mypie->SetFractionFormat("2.1f");

Definition at line 1337 of file TPie.cxx.

◆ SetHeight()

void TPie::SetHeight ( Double_t val = .08)

Set the height, in pixel, for the piechart if is drawn using the pseudo-3d mode.

The default value is 20 pixel.

Definition at line 1308 of file TPie.cxx.

◆ SetLabelFormat()

void TPie::SetLabelFormat ( const char * fmt)

This method is used to customize the label format.

See the class description for the possible labels format

Definition at line 1317 of file TPie.cxx.

◆ SetLabels()

void TPie::SetLabels ( const char * lbls[])

Set the labels for all the slices.

Definition at line 1345 of file TPie.cxx.

◆ SetLabelsOffset()

void TPie::SetLabelsOffset ( Float_t labelsoffset)

Set the distance between the label end the external line of the TPie.

Definition at line 1354 of file TPie.cxx.

◆ SetName()

void TNamed::SetName ( const char * name)
virtualinherited

Set the name of the TNamed.

WARNING: if the object is a member of a THashTable or THashList container the container must be Rehash()'ed after SetName(). For example the list of objects in the current directory is a THashList.

Reimplemented in TEveScene, TColor, TSystemDirectory, TSystemFile, TNode, TRotMatrix, TShape, TEfficiency, TFormula, TGraph2D, TH1, RooAbsArg, RooAbsData, RooDataHist, RooDataSet, RooFitResult, RooPlot, ROOT::Experimental::XRooFit::xRooNode, TChain, TEventList, TTree, TGraph, and TDirectory.

Definition at line 149 of file TNamed.cxx.

◆ SetNameTitle()

void TNamed::SetNameTitle ( const char * name,
const char * title )
virtualinherited

Set all the TNamed parameters (name and title).

WARNING: if the name is changed and the object is a member of a THashTable or THashList container the container must be Rehash()'ed after SetName(). For example the list of objects in the current directory is a THashList.

Reimplemented in TContextMenu, TNode, TGraph2D, TH1, RooAbsArg, RooAbsData, RooDataHist, RooDataSet, RooFitResult, RooPlot, and TGraph.

Definition at line 163 of file TNamed.cxx.

◆ SetObjectStat()

void TObject::SetObjectStat ( Bool_t stat)
staticinherited

Turn on/off tracking of objects in the TObjectTable.

Definition at line 1188 of file TObject.cxx.

◆ SetPercentFormat()

void TPie::SetPercentFormat ( const char * fmt)

Set the numeric format for the percent value of a slice, default: %3.1f.

Definition at line 1362 of file TPie.cxx.

◆ SetRadius()

void TPie::SetRadius ( Double_t rad)

Set the pie chart's radius' value.

Definition at line 1370 of file TPie.cxx.

◆ SetTextAlign()

virtual void TAttText::SetTextAlign ( Short_t align = 11)
inlinevirtualinherited

Set the text alignment.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGWin32VirtualXProxy, and TGX11.

Definition at line 48 of file TAttText.h.

◆ SetTextAngle()

virtual void TAttText::SetTextAngle ( Float_t tangle = 0)
inlinevirtualinherited

Set the text angle.

Reimplemented in TGWin32VirtualXProxy, and TGraphNode.

Definition at line 49 of file TAttText.h.

◆ SetTextAttributes()

void TAttText::SetTextAttributes ( )
virtualinherited

Invoke the DialogCanvas Text attributes.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 418 of file TAttText.cxx.

◆ SetTextColor() [1/2]

virtual void TAttText::SetTextColor ( Color_t tcolor = 1)
inlinevirtualinherited

Set the text color.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGX11, TPDF, TPostScript, TSVG, TTeXDump, and TGWin32VirtualXProxy.

Definition at line 50 of file TAttText.h.

◆ SetTextColor() [2/2]

void TAttText::SetTextColor ( TColorNumber lcolor)
inherited

Definition at line 453 of file TAttText.cxx.

◆ SetTextColorAlpha()

void TAttText::SetTextColorAlpha ( Color_t tcolor,
Float_t talpha )
virtualinherited

Set a transparent text color.

Parameters
tcolordefines the text color
talphadefines the percentage of opacity from 0. (fully transparent) to 1. (fully opaque).
Note
talpha is ignored (treated as 1) if the TCanvas has no GL support activated.

Definition at line 430 of file TAttText.cxx.

◆ SetTextFont()

virtual void TAttText::SetTextFont ( Font_t tfont = 62)
inlinevirtualinherited

Set the text font.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGX11, and TGWin32VirtualXProxy.

Definition at line 52 of file TAttText.h.

◆ SetTextSize()

virtual void TAttText::SetTextSize ( Float_t tsize = 1)
inlinevirtualinherited

Set the text size.

Reimplemented in TVirtualX, TGQuartz, TGWin32, TGX11, and TGWin32VirtualXProxy.

Definition at line 53 of file TAttText.h.

◆ SetTextSizePixels()

void TAttText::SetTextSizePixels ( Int_t npixels)
virtualinherited

Set the text size in pixel.

Set the text size in pixels.

If the font precision is greater than 2, the text size is set to npixels, otherwise the text size is computed as a percent of the pad size.

Reimplemented in TGWin32VirtualXProxy.

Definition at line 441 of file TAttText.cxx.

◆ SetTitle()

void TNamed::SetTitle ( const char * title = "")
virtualinherited

◆ SetUniqueID()

void TObject::SetUniqueID ( UInt_t uid)
virtualinherited

Set the unique object id.

Definition at line 899 of file TObject.cxx.

◆ SetValueFormat()

void TPie::SetValueFormat ( const char * fmt)

Set the numeric format the slices' values.

Used by val (see SetLabelFormat()).

Definition at line 1384 of file TPie.cxx.

◆ SetX()

void TPie::SetX ( Double_t x)

Set X value.

Definition at line 1392 of file TPie.cxx.

◆ SetY()

void TPie::SetY ( Double_t y)

Set Y value.

Definition at line 1400 of file TPie.cxx.

◆ Sizeof()

Int_t TNamed::Sizeof ( ) const
virtualinherited

Return size of the TNamed part of the TObject.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TDirectoryFile, TFile, and TKey.

Definition at line 182 of file TNamed.cxx.

◆ SortSlices()

void TPie::SortSlices ( Bool_t amode = kTRUE,
Float_t merge_threshold = .0 )

This method, mainly intended for internal use, ordered the slices according their values.

The default (amode=kTRUE) is increasing order, but is also possible in decreasing order (amode=kFALSE).

If the merge_threshold>0 the slice that contains a quantity smaller than merge_threshold are merged together

Definition at line 1444 of file TPie.cxx.

◆ Streamer()

void TPie::Streamer ( TBuffer & R__b)
overridevirtual

Stream an object of class TObject.

Reimplemented from TNamed.

◆ StreamerNVirtual()

void TPie::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b)
inline

Definition at line 111 of file TPie.h.

◆ SysError()

void TObject::SysError ( const char * location,
const char * fmt,
... ) const
virtualinherited

Issue system error message.

Use "location" to specify the method where the system error occurred. Accepts standard printf formatting arguments.

Definition at line 1112 of file TObject.cxx.

◆ TestBit()

R__ALWAYS_INLINE Bool_t TObject::TestBit ( UInt_t f) const
inlineinherited

Definition at line 204 of file TObject.h.

◆ TestBits()

Int_t TObject::TestBits ( UInt_t f) const
inlineinherited

Definition at line 205 of file TObject.h.

◆ UseCurrentStyle()

void TObject::UseCurrentStyle ( )
virtualinherited

Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked.

Reimplemented in TCanvas, TPad, TFrame, TPaveStats, TPaveText, TAxis3D, TGraph, TH1, and TTree.

Definition at line 909 of file TObject.cxx.

◆ Warning()

void TObject::Warning ( const char * location,
const char * fmt,
... ) const
virtualinherited

Issue warning message.

Use "location" to specify the method where the warning occurred. Accepts standard printf formatting arguments.

Definition at line 1084 of file TObject.cxx.

◆ Write() [1/2]

Int_t TObject::Write ( const char * name = nullptr,
Int_t option = 0,
Int_t bufsize = 0 )
virtualinherited

Write this object to the current directory.

For more see the const version of this method.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TBuffer, ROOT::TBufferMergerFile, TDirectoryFile, TFile, TParallelMergingFile, TCollection, TMap, and TTree.

Definition at line 989 of file TObject.cxx.

◆ Write() [2/2]

Int_t TObject::Write ( const char * name = nullptr,
Int_t option = 0,
Int_t bufsize = 0 ) const
virtualinherited

Write this object to the current directory.

The data structure corresponding to this object is serialized. The corresponding buffer is written to the current directory with an associated key with name "name".

Writing an object to a file involves the following steps:

  • Creation of a support TKey object in the current directory. The TKey object creates a TBuffer object.
  • The TBuffer object is filled via the class::Streamer function.
  • If the file is compressed (default) a second buffer is created to hold the compressed buffer.
  • Reservation of the corresponding space in the file by looking in the TFree list of free blocks of the file.
  • The buffer is written to the file.

Bufsize can be given to force a given buffer size to write this object. By default, the buffersize will be taken from the average buffer size of all objects written to the current file so far.

If a name is specified, it will be the name of the key. If name is not given, the name of the key will be the name as returned by GetName().

The option can be a combination of: kSingleKey, kOverwrite or kWriteDelete Using the kOverwrite option a previous key with the same name is overwritten. The previous key is deleted before writing the new object. Using the kWriteDelete option a previous key with the same name is deleted only after the new object has been written. This option is safer than kOverwrite but it is slower. NOTE: Neither kOverwrite nor kWriteDelete reduces the size of a TFile– the space is simply freed up to be overwritten; in the case of a TTree, it is more complicated. If one opens a TTree, appends some entries, then writes it out, the behaviour is effectively the same. If, however, one creates a new TTree and writes it out in this way, only the metadata is replaced, effectively making the old data invisible without deleting it. TTree::Delete() can be used to mark all disk space occupied by a TTree as free before overwriting its metadata this way. The kSingleKey option is only used by TCollection::Write() to write a container with a single key instead of each object in the container with its own key.

An object is read from the file into memory via TKey::Read() or via TObject::Read().

The function returns the total number of bytes written to the file. It returns 0 if the object cannot be written.

Reimplemented in TSQLFile, TXMLFile, TDirectory, TBuffer, TDirectoryFile, TFile, TParallelMergingFile, TCollection, TMap, and TTree.

Definition at line 964 of file TObject.cxx.

Member Data Documentation

◆ fAngle3D

Float_t TPie::fAngle3D
protected

The angle of the pseudo-3d view.

Definition at line 46 of file TPie.h.

◆ fAngularOffset

Double_t TPie::fAngularOffset
protected

Offset angular offset for the first slice.

Definition at line 36 of file TPie.h.

◆ fBits

UInt_t TObject::fBits
privateinherited

bit field status word

Definition at line 47 of file TObject.h.

◆ fFractionFormat

TString TPie::fFractionFormat
protected

Rform numeric format for the fraction of a slice.

Definition at line 40 of file TPie.h.

◆ fgDtorOnly

Longptr_t TObject::fgDtorOnly = 0
staticprivateinherited

object for which to call dtor only (i.e. no delete)

Definition at line 49 of file TObject.h.

◆ fgObjectStat

Bool_t TObject::fgObjectStat = kTRUE
staticprivateinherited

if true keep track of objects in TObjectTable

Definition at line 50 of file TObject.h.

◆ fHeight

Double_t TPie::fHeight
protected

Height of the slice in pixel.

Definition at line 45 of file TPie.h.

◆ fIs3D

Bool_t TPie::fIs3D
protected

! true if the pseudo-3d is enabled

Definition at line 44 of file TPie.h.

◆ fLabelFormat

TString TPie::fLabelFormat
protected

Format format of the slices' label.

Definition at line 38 of file TPie.h.

◆ fLabelsOffset

Float_t TPie::fLabelsOffset
protected

LabelsOffset offset of label.

Definition at line 37 of file TPie.h.

◆ fLegend

TLegend* TPie::fLegend {nullptr}
private

!Legend for this piechart

Definition at line 30 of file TPie.h.

◆ fName

TString TNamed::fName
protectedinherited

Definition at line 32 of file TNamed.h.

◆ fNvals

Int_t TPie::fNvals
protected

Number of elements.

Definition at line 42 of file TPie.h.

◆ fPercentFormat

TString TPie::fPercentFormat
protected

Pfrom numeric format for the percent of a slice.

Definition at line 41 of file TPie.h.

◆ fPieSlices

TPieSlice** TPie::fPieSlices {nullptr}
protected

[fNvals] Slice array of this pie-chart

Definition at line 43 of file TPie.h.

◆ fRadius

Double_t TPie::fRadius
protected

Radius Pie radius.

Definition at line 35 of file TPie.h.

◆ fSlices

Float_t* TPie::fSlices {nullptr}
private

!Subdivisions of the slices

Definition at line 29 of file TPie.h.

◆ fSum

Float_t TPie::fSum
private

!Sum for the slice values

Definition at line 28 of file TPie.h.

◆ fTextAlign

Short_t TAttText::fTextAlign
protectedinherited

Text alignment.

Definition at line 26 of file TAttText.h.

◆ fTextAngle

Float_t TAttText::fTextAngle
protectedinherited

Text angle.

Definition at line 24 of file TAttText.h.

◆ fTextColor

Color_t TAttText::fTextColor
protectedinherited

Text color.

Definition at line 27 of file TAttText.h.

◆ fTextFont

Font_t TAttText::fTextFont
protectedinherited

Text font.

Definition at line 28 of file TAttText.h.

◆ fTextSize

Float_t TAttText::fTextSize
protectedinherited

Text size.

Definition at line 25 of file TAttText.h.

◆ fTitle

TString TNamed::fTitle
protectedinherited

Definition at line 33 of file TNamed.h.

◆ fUniqueID

UInt_t TObject::fUniqueID
privateinherited

object unique identifier

Definition at line 46 of file TObject.h.

◆ fValueFormat

TString TPie::fValueFormat
protected

Vform numeric format for the value.

Definition at line 39 of file TPie.h.

◆ fX

Double_t TPie::fX
protected

X coordinate of the pie centre.

Definition at line 33 of file TPie.h.

◆ fY

Double_t TPie::fY
protected

Y coordinate of the pie centre.

Definition at line 34 of file TPie.h.


The documentation for this class was generated from the following files: