Draw a Pie Chart,.

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 <");
}

Definition at line 23 of file TPie.h.

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.

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.

void	ExecuteEvent (Int_t, Int_t, Int_t) override
	Execute the mouse events.

Float_t	GetAngle3D ()

Double_t	GetAngularOffset ()

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 ()

const char *	GetLabelFormat ()

Float_t	GetLabelsOffset ()

TLegend *	GetLegend ()
	If created before by Paint option or by MakeLegend method return the pointer to the legend, otherwise return 0;.

const char *	GetPercentFormat ()

Double_t	GetRadius ()

TPieSlice *	GetSlice (Int_t i)
	Return the reference to the slice of index 'id'.

const char *	GetValueFormat ()

Double_t	GetX ()

Double_t	GetY ()

TClass *	IsA () const override

TLegend *	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.

void	MakeSlices (Bool_t force=kFALSE)
	Make the slices.

void	Paint (Option_t *) override
	Paint a Pie chart in a canvas.

void	SavePrimitive (std::ostream &out, Option_t *opts="") override
	Save primitive as a 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	SetCircle (Double_t x=.5, Double_t y=.5, Double_t rad=.4)
	Set the coordinates of the circle that describe the pie:

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.

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.

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.

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)

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TNamed &named)
	TNamed copy ctor.

	TNamed (const TString &name, const TString &title)

virtual	~TNamed ()
	TNamed destructor.

void	Clear (Option_t *option="") override
	Set name and title to empty strings ("").

TObject *	Clone (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 (TObject &named) const override
	Copy this to obj.

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer.

const char *	GetName () const override
	Returns name of object.

const char *	GetTitle () const override
	Returns title of object.

ULong_t	Hash () const override
	Return hash value for this object.

Bool_t	IsSortable () const override

void	ls (Option_t *option="") const override
	List TNamed name and title.

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator.

void	Print (Option_t *option="") const override
	Print TNamed name and title.

virtual void	SetName (const char *name)
	Set the name of the TNamed.

virtual void	SetNameTitle (const char name, const char title)
	Set all the TNamed parameters (name and title).

virtual void	SetTitle (const char *title="")
	Set the title of the TNamed.

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor.

	TObject (const TObject &object)
	TObject copy ctor.

virtual	~TObject ()
	TObject destructor.

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract.

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad.

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.

virtual void	Delete (Option_t *option="")
	Delete this object.

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs.

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad 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.

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message.

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes.

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes.

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object.

virtual const char *	GetIconName () const
	Returns mime type 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_t *	GetOption () const

virtual UInt_t	GetUniqueID () const
	Return the unique object id.

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out.

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

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message.

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname".

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl.

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas.

void	InvertBit (UInt_t f)

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

R__ALWAYS_INLINE Bool_t	IsZombie () const

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary).

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification (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 *ptr)
	Operator delete.

void	operator delete (void ptr, void vp)
	Only called by placement new when throwing an exception.

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)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator.

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list.

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory.

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list.

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename.

void	SetBit (UInt_t f)

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f.

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object.

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id.

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.

Public Member Functions inherited from TAttText
	TAttText ()
	AttText default constructor.

	TAttText (Int_t align, Float_t angle, Color_t color, Style_t font, Float_t tsize)
	AttText normal constructor.

virtual	~TAttText ()
	AttText destructor.

void	Copy (TAttText &atttext) const
	Copy this text attributes to a new TAttText.

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 void	Modify ()
	Change current text attributes if necessary.

virtual void	ResetAttText (Option_t *toption="")
	Reset this text attributes to default values.

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.

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.

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.

void	StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Static Public Member Functions
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TNamed
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

Static Public Member Functions inherited from TObject
static TClass *	Class ()

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.

Static Public Member Functions inherited from TAttText
static TClass *	Class ()

static const char *	Class_Name ()

static constexpr Version_t	Class_Version ()

static const char *	DeclFileName ()

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.

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.

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.

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Protected Attributes inherited from TAttText
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.

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.

Private Attributes
TLegend *	fLegend {nullptr}
	!Legend for this piechart

Float_t *	fSlices {nullptr}
	!Subdivisions of the slices

Float_t	fSum
	!Sum for the slice values

Additional Inherited Members
Public Types inherited from TObject
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 )) }

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = (1ULL << ( 3 )) }

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected).

void	MakeZombie ()

#include <TPie.h>

Inheritance diagram for TPie:

[legend]

Constructor & Destructor Documentation

◆ TPie() [1/6]

TPie::TPie ( )

Default constructor.

Definition at line 64 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 73 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 92 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 106 of file TPie.cxx.

◆ TPie() [5/6]

TPie::TPie ( const TH1 * h )

Constructor from a TH1.

Definition at line 121 of file TPie.cxx.

◆ TPie() [6/6]

TPie::TPie ( const TPie & cpy )

Copy constructor.

Definition at line 145 of file TPie.cxx.

◆ ~TPie()

TPie::~TPie ( )

override

Destructor.

Definition at line 156 of file TPie.cxx.

Member Function Documentation

◆ 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.

◆ DeclFileName()

static const char * TPie::DeclFileName ( )

inlinestatic

Returns: Name of the file containing the class declaration

Definition at line 111 of file TPie.h.

◆ 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 170 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 190 of file TPie.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 277 of file TPie.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 300 of file TPie.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 396 of file TPie.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.

◆ 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 648 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 656 of file TPie.cxx.

◆ GetEntryLabel()

const char * TPie::GetEntryLabel ( Int_t i )

Returns the label of the entry number "i".

Definition at line 640 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 664 of file TPie.cxx.

◆ GetEntryLineStyle()

Int_t TPie::GetEntryLineStyle ( Int_t i )

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

Definition at line 672 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 680 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 688 of file TPie.cxx.

◆ GetEntryVal()

Double_t TPie::GetEntryVal ( Int_t i )

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

Definition at line 696 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.

◆ 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 705 of file TPie.cxx.

◆ 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 714 of file TPie.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.

◆ 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 723 of file TPie.cxx.

◆ IsA()

TClass * TPie::IsA ( ) const

inlineoverridevirtual

Returns: TClass describing current object

Reimplemented from TNamed.

Definition at line 111 of file TPie.h.

◆ 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 770 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 1380 of file TPie.cxx.

◆ Paint()

void TPie::Paint ( Option_t * option )

overridevirtual

Paint a Pie chart in a canvas.

The possible option are:

"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.

Other options changing the labels' format are described in TPie::SetLabelFormat().

Reimplemented from TObject.

Definition at line 804 of file TPie.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 1120 of file TPie.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 1152 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 1165 of file TPie.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 1182 of file TPie.cxx.

◆ SetEntryFillColor()

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

Set the color for the slice "i".

Definition at line 1226 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 1234 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 1193 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 1202 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 1210 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 1218 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 1242 of file TPie.cxx.

◆ SetEntryVal()

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

Set the value of a slice.

Definition at line 1250 of file TPie.cxx.

◆ SetFillColors()

void TPie::SetFillColors ( Int_t * colors )

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

Definition at line 1260 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 1308 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 1272 of file TPie.cxx.

◆ SetLabelFormat()

void TPie::SetLabelFormat ( const char * fmt )

This method is used to customize the label format.

The format string must contain one of these modifiers:

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

ex. : mypie->SetLabelFormat("%txt (%frac)");

Definition at line 1288 of file TPie.cxx.

◆ SetLabels()

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

Set the labels for all the slices.

Definition at line 1316 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 1325 of file TPie.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 1333 of file TPie.cxx.

◆ SetRadius()

void TPie::SetRadius ( Double_t rad )

Set the pie chart's radius' value.

Definition at line 1341 of file TPie.cxx.

◆ SetValueFormat()

void TPie::SetValueFormat ( const char * fmt )

Set the numeric format the slices' values.

Used by val (see SetLabelFormat()).

Definition at line 1355 of file TPie.cxx.

◆ SetX()

void TPie::SetX ( Double_t x )

Set X value.

Definition at line 1363 of file TPie.cxx.

◆ SetY()

void TPie::SetY ( Double_t y )

Set Y value.

Definition at line 1371 of file TPie.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 1415 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.

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.

◆ fFractionFormat

TString TPie::fFractionFormat

protected

Rform numeric format for the fraction of a slice.

Definition at line 40 of file TPie.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.

◆ 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.

◆ 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.

Libraries for TPie:

[legend]

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

graf2d/graf/inc/TPie.h
graf2d/graf/src/TPie.cxx

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TPie() [1/6]

◆ TPie() [2/6]

◆ TPie() [3/6]

◆ TPie() [4/6]

◆ TPie() [5/6]

◆ TPie() [6/6]

◆ ~TPie()

Member Function Documentation

◆ Class()

◆ Class_Name()

◆ Class_Version()

◆ DeclFileName()

◆ DistancetoPrimitive()

◆ DistancetoSlice()

◆ Draw()

◆ DrawGhost()

◆ ExecuteEvent()

◆ GetAngle3D()

◆ GetAngularOffset()

◆ GetEntries()

◆ GetEntryFillColor()

◆ GetEntryFillStyle()

◆ GetEntryLabel()

◆ GetEntryLineColor()

◆ GetEntryLineStyle()

◆ GetEntryLineWidth()

◆ GetEntryRadiusOffset()

◆ GetEntryVal()

◆ GetFractionFormat()

◆ GetHeight()

◆ GetLabelFormat()

◆ GetLabelsOffset()

◆ GetLegend()

◆ GetPercentFormat()

◆ GetRadius()

◆ GetSlice()

◆ GetValueFormat()

◆ GetX()

◆ GetY()

◆ Init()

◆ IsA()

◆ MakeLegend()

◆ MakeSlices()

◆ Paint()

◆ SavePrimitive()

◆ SetAngle3D()

◆ SetAngularOffset()

◆ SetCircle()

◆ SetEntryFillColor()

◆ SetEntryFillStyle()

◆ SetEntryLabel()

◆ SetEntryLineColor()

◆ SetEntryLineStyle()

◆ SetEntryLineWidth()

◆ SetEntryRadiusOffset()

◆ SetEntryVal()

◆ SetFillColors()

◆ SetFractionFormat()

◆ SetHeight()

◆ SetLabelFormat()

◆ SetLabels()

◆ SetLabelsOffset()

◆ SetPercentFormat()

◆ SetRadius()

◆ SetValueFormat()

◆ SetX()

◆ SetY()

◆ SortSlices()

◆ Streamer()

◆ StreamerNVirtual()

Member Data Documentation

◆ fAngle3D

◆ fAngularOffset