Draw a Pie Chart,.

Example:

void piechart()
{
   // Pie chart example.
   //Authors: Olivier Couet, Guido Volpi
   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 31 of file TPie.h.

Public Member Functions
	TPie ()
	Default constructor. More...

	TPie (const char , const char , Int_t)
	This constructor creates a pie chart when only the number of the slices is known. More...

	TPie (const char , const char , Int_t, Double_t , Int_t cols=0, const char *lbls[]=0)
	Normal constructor. More...

	TPie (const char , const char , Int_t, Float_t , Int_t cols=0, const char *lbls[]=0)
	Normal constructor (Float_t). More...

	TPie (const TH1 *h)
	Constructor from a TH1. More...

	TPie (const TPie &)
	Copy constructor. More...

	~TPie ()
	Destructor. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Evaluate the distance to the chart in gPad. More...

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

virtual void	Draw (Option_t *option="l")
	Draw the pie chart. More...

virtual void	ExecuteEvent (Int_t, Int_t, Int_t)
	Execute the mouse events. More...

Float_t	GetAngle3D ()

Double_t	GetAngularOffset ()

Int_t	GetEntryFillColor (Int_t)
	Return the color of the slice number "i". More...

Int_t	GetEntryFillStyle (Int_t)
	Return the style use to fill the slice number "i". More...

const char *	GetEntryLabel (Int_t)
	Returns the label of the entry number "i". More...

Int_t	GetEntryLineColor (Int_t)
	Return the line color used to outline thi "i" slice. More...

Int_t	GetEntryLineStyle (Int_t)
	Return the style used to outline thi "i" slice. More...

Int_t	GetEntryLineWidth (Int_t)
	Return the line width used to outline thi "i" slice. More...

Double_t	GetEntryRadiusOffset (Int_t)
	Return the radial offset's value for the slice number "i". More...

Double_t	GetEntryVal (Int_t)
	Return the value associated with the slice number "i". More...

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;. More...

Int_t	GetEntries ()

const char *	GetPercentFormat ()

Double_t	GetRadius ()

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

const char *	GetValueFormat ()

Double_t	GetX ()

Double_t	GetY ()

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. More...

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

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

void	SavePrimitive (std::ostream &out, Option_t *opts="")
	Save primitive as a C++ statement(s) on output stream out. More...

void	SetAngle3D (Float_t val=30.)
	Set the value of for the pseudo 3D view angle, in degree. More...

void	SetAngularOffset (Double_t)
	Set the global angular offset for slices in degree [0,360]. More...

void	SetCircle (Double_t x=.5, Double_t y=.5, Double_t rad=.4)
	Set the coordinates of the circle that describe the pie: More...

void	SetEntryLabel (Int_t, const char *text="Slice")
	Set slice number "i" label. More...

void	SetEntryLineColor (Int_t, Int_t)
	Set the color for the slice's outline. "i" is the slice number. More...

void	SetEntryLineStyle (Int_t, Int_t)
	Set the style for the slice's outline. "i" is the slice number. More...

void	SetEntryLineWidth (Int_t, Int_t)
	Set the width of the slice's outline. "i" is the slice number. More...

void	SetEntryFillColor (Int_t, Int_t)
	Set the color for the slice "i". More...

void	SetEntryFillStyle (Int_t, Int_t)
	Set the fill style for the "i" slice. More...

void	SetEntryRadiusOffset (Int_t, Double_t)
	Set the distance, in the direction of the radius of the slice. More...

void	SetEntryVal (Int_t, Double_t)
	Set the value of a slice. More...

void	SetFillColors (Int_t *)
	Set the fill colors for all the TPie's slices. More...

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. More...

void	SetHeight (Double_t val=.08)
	Set the height, in pixel, for the piechart if is drawn using the pseudo-3d mode. More...

void	SetLabelFormat (const char *)
	This method is used to customize the label format. More...

void	SetLabels (const char *[])
	Set the labels for all the slices. More...

void	SetLabelsOffset (Float_t)
	Set the distance between the label end the external line of the TPie. More...

void	SetPercentFormat (const char *)
	Set the numeric format for the percent value of a slice, default: %3.1f. More...

void	SetRadius (Double_t)
	Set the pie chart's radius' value. More...

void	SetValueFormat (const char *)
	Set the numeric format the slices' values. More...

void	SetX (Double_t)
	Set X value. More...

void	SetY (Double_t)
	Set Y value. More...

void	SortSlices (Bool_t amode=kTRUE, Float_t merge_thresold=.0)
	This method, mainly intended for internal use, ordered the slices according their values. More...

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

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

	TNamed (const TNamed &named)

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

virtual	~TNamed ()

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

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects. More...

virtual void	Copy (TObject &named) const
	Copy this to obj. More...

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

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetTitle () const
	Returns title of object. More...

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

virtual Bool_t	IsSortable () const

virtual void	SetName (const char *name)
	Change (i.e. More...

virtual void	SetNameTitle (const char name, const char title)
	Change (i.e. set) all the TNamed parameters (name and title). More...

virtual void	SetTitle (const char *title="")
	Change (i.e. set) the title of the TNamed. More...

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

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

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

Public Member Functions inherited from TObject
	TObject ()

	TObject (const TObject &object)
	TObject copy ctor. More...

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

virtual	~TObject ()
	TObject destructor. More...

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

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

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

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

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

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

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

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

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

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

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual Option_t *	GetOption () const

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

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

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

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

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

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

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

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

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

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

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

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

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

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

void *	operator new (size_t sz)

void *	operator new[] (size_t sz)

void *	operator new (size_t sz, void *vp)

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

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

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

void	SetBit (UInt_t f)

void	ResetBit (UInt_t f)

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

void	InvertBit (UInt_t f)

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

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

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

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

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

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

Public Member Functions inherited from TAttText
	TAttText ()

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

virtual	~TAttText ()
	AttText destructor. More...

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

virtual Short_t	GetTextAlign () const

virtual Float_t	GetTextAngle () const

virtual Color_t	GetTextColor () const

virtual Font_t	GetTextFont () const

virtual Float_t	GetTextSize () const

virtual void	Modify ()
	Change current text attributes if necessary. More...

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

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. More...

virtual void	SetTextAttributes ()
	Invoke the DialogCanvas Text attributes. More...

virtual void	SetTextAlign (Short_t align=11)

virtual void	SetTextAngle (Float_t tangle=0)

virtual void	SetTextColor (Color_t tcolor=1)

virtual void	SetTextColorAlpha (Color_t tcolor, Float_t talpha)
	Set a transparent marker color. More...

virtual void	SetTextFont (Font_t tfont=62)

virtual void	SetTextSize (Float_t tsize=1)

virtual void	SetTextSizePixels (Int_t npixels)
	Set the text size in pixels. More...

Protected Attributes
Double_t	fX
	Legend for this piechart. More...

Double_t	fY

Double_t	fRadius

Double_t	fAngularOffset

Float_t	fLabelsOffset

TString	fLabelFormat

TString	fValueFormat

TString	fFractionFormat

TString	fPercentFormat

Int_t	fNvals

TPieSlice **	fPieSlices

Bool_t	fIs3D

Double_t	fHeight
	true if the pseudo-3d is enabled More...

Float_t	fAngle3D

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

Protected Attributes inherited from TAttText
Float_t	fTextAngle

Float_t	fTextSize

Short_t	fTextAlign

Color_t	fTextColor

Font_t	fTextFont

Private Member Functions
void	Init (Int_t np, Double_t ao, Double_t x, Double_t y, Double_t r)
	Common initialization for all constructors. More...

void	DrawGhost ()
	This method is for internal use. More...

Private Attributes
Float_t	fSum

Float_t *	fSlices
	Sum for the slice values. More...

TLegend *	fLegend
	Subdivisions of the slices. More...

Additional Inherited Members
Public Types inherited from TObject
enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Protected Member Functions inherited from TObject
void	MakeZombie ()

virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

#include <TPie.h>

Inheritance diagram for TPie:

Collaboration diagram for TPie:

Constructor & Destructor Documentation

TPie::TPie ( )

Default constructor.

Definition at line 62 of file TPie.cxx.

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 71 of file TPie.cxx.

TPie::TPie	(	const char *	name,
		const char *	title,
		Int_t	npoints,
		Double_t *	vals,
		Int_t *	colors = `0`,
		const char *	lbls[] = `0`
	)

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 90 of file TPie.cxx.

TPie::TPie	(	const char *	name,
		const char *	title,
		Int_t	npoints,
		Float_t *	vals,
		Int_t *	cols = `0`,
		const char *	lbls[] = `0`
	)

Normal constructor (Float_t).

Definition at line 104 of file TPie.cxx.

TPie::TPie ( const TH1 * h )

Constructor from a TH1.

Definition at line 119 of file TPie.cxx.

TPie::TPie ( const TPie & cpy )

Copy constructor.

Definition at line 143 of file TPie.cxx.

TPie::~TPie ( )

Destructor.

Definition at line 155 of file TPie.cxx.

Member Function Documentation

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

virtual

Evaluate the distance to the chart in gPad.

Reimplemented from TObject.

Definition at line 168 of file TPie.cxx.

Referenced by THistPainter::DistancetoPrimitive().

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 188 of file TPie.cxx.

Referenced by DistancetoPrimitive().

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

virtual

Draw the pie chart.

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

Reimplemented from TObject.

Definition at line 274 of file TPie.cxx.

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 297 of file TPie.cxx.

Referenced by ExecuteEvent().

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

virtual

Execute the mouse events.

Reimplemented from TObject.

Definition at line 393 of file TPie.cxx.

Referenced by THistPainter::ExecuteEvent().

Float_t TPie::GetAngle3D ( )

inline

Definition at line 69 of file TPie.h.

Referenced by TPieEditor::SetModel().

Double_t TPie::GetAngularOffset ( )

inline

Definition at line 70 of file TPie.h.

Referenced by SavePrimitive().

Int_t TPie::GetEntries ( )

inline

Definition at line 84 of file TPie.h.

Int_t TPie::GetEntryFillColor ( Int_t i )

Return the color of the slice number "i".

Definition at line 646 of file TPie.cxx.

Int_t TPie::GetEntryFillStyle ( Int_t i )

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

Definition at line 654 of file TPie.cxx.

const char * TPie::GetEntryLabel ( Int_t i )

Returns the label of the entry number "i".

Definition at line 638 of file TPie.cxx.

Int_t TPie::GetEntryLineColor ( Int_t i )

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

Definition at line 662 of file TPie.cxx.

Int_t TPie::GetEntryLineStyle ( Int_t i )

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

Definition at line 670 of file TPie.cxx.

Int_t TPie::GetEntryLineWidth ( Int_t i )

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

Definition at line 678 of file TPie.cxx.

Double_t TPie::GetEntryRadiusOffset ( Int_t i )

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

Definition at line 686 of file TPie.cxx.

Double_t TPie::GetEntryVal ( Int_t i )

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

Definition at line 694 of file TPie.cxx.

const char* TPie::GetFractionFormat ( )

inline

Definition at line 79 of file TPie.h.

Double_t TPie::GetHeight ( )

inline

Definition at line 80 of file TPie.h.

Referenced by TPieEditor::SetModel().

const char* TPie::GetLabelFormat ( )

inline

Definition at line 81 of file TPie.h.

Referenced by SavePrimitive().

Float_t TPie::GetLabelsOffset ( )

inline

Definition at line 82 of file TPie.h.

Referenced by SavePrimitive().

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 703 of file TPie.cxx.

const char* TPie::GetPercentFormat ( )

inline

Definition at line 85 of file TPie.h.

Referenced by SavePrimitive().

Double_t TPie::GetRadius ( )

inline

Definition at line 86 of file TPie.h.

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 712 of file TPie.cxx.

Referenced by GetEntryFillColor(), GetEntryFillStyle(), GetEntryLabel(), GetEntryLineColor(), GetEntryLineStyle(), GetEntryLineWidth(), GetEntryRadiusOffset(), and GetEntryVal().

const char* TPie::GetValueFormat ( )

inline

Definition at line 88 of file TPie.h.

Referenced by SavePrimitive().

Double_t TPie::GetX ( )

inline

Definition at line 89 of file TPie.h.

Double_t TPie::GetY ( )

inline

Definition at line 90 of file TPie.h.

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 721 of file TPie.cxx.

Referenced by TPie().

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 768 of file TPie.cxx.

void TPie::MakeSlices ( Bool_t force = kFALSE )

Make the slices.

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

Definition at line 1406 of file TPie.cxx.

Referenced by DistancetoSlice(), DrawGhost(), ExecuteEvent(), Paint(), SetAngularOffset(), SetEntryVal(), TPieSlice::SetValue(), and SortSlices().

void TPie::Paint ( Option_t * option )

virtual

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 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 802 of file TPie.cxx.

Referenced by THistPainter::Paint().

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

virtual

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

Reimplemented from TObject.

Definition at line 1123 of file TPie.cxx.

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 1178 of file TPie.cxx.

Referenced by TPieEditor::DoChange3DAngle().

void TPie::SetAngularOffset ( Double_t offset )

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

Definition at line 1191 of file TPie.cxx.

Referenced by ExecuteEvent().

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 1208 of file TPie.cxx.

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

Set the color for the slice "i".

Definition at line 1252 of file TPie.cxx.

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

Set the fill style for the "i" slice.

Definition at line 1260 of file TPie.cxx.

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 1219 of file TPie.cxx.

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 1228 of file TPie.cxx.

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 1236 of file TPie.cxx.

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 1244 of file TPie.cxx.

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

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

Definition at line 1268 of file TPie.cxx.

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

Set the value of a slice.

Definition at line 1276 of file TPie.cxx.

void TPie::SetFillColors ( Int_t * colors )

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

Definition at line 1286 of file TPie.cxx.

Referenced by TPie().

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 1334 of file TPie.cxx.

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 1298 of file TPie.cxx.

Referenced by TPieEditor::DoChange3DAngle().

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 1314 of file TPie.cxx.

Referenced by TPie().

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

Set the labels for all the slices.

Definition at line 1342 of file TPie.cxx.

Referenced by TPie().

void TPie::SetLabelsOffset ( Float_t labelsoffset )

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

Definition at line 1351 of file TPie.cxx.

void TPie::SetPercentFormat ( const char * fmt )

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

Definition at line 1359 of file TPie.cxx.

void TPie::SetRadius ( Double_t rad )

Set the pie chart's radius' value.

Definition at line 1367 of file TPie.cxx.

void TPie::SetValueFormat ( const char * fmt )

Set the numeric format the slices' values.

Used by val (see SetLabelFormat()).

Definition at line 1381 of file TPie.cxx.

void TPie::SetX ( Double_t x )

Set X value.

Definition at line 1389 of file TPie.cxx.

void TPie::SetY ( Double_t y )

Set Y value.

Definition at line 1397 of file TPie.cxx.

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 1441 of file TPie.cxx.

Referenced by Paint().

Member Data Documentation

Float_t TPie::fAngle3D

protected

Definition at line 54 of file TPie.h.

Referenced by DistancetoSlice(), DrawGhost(), ExecuteEvent(), GetAngle3D(), Init(), Paint(), and SetAngle3D().

Double_t TPie::fAngularOffset

protected

Definition at line 44 of file TPie.h.

Referenced by ExecuteEvent(), GetAngularOffset(), Init(), MakeSlices(), SetAngularOffset(), and TPie().

TString TPie::fFractionFormat

protected

Definition at line 48 of file TPie.h.

Referenced by Init(), Paint(), and SetFractionFormat().

Double_t TPie::fHeight

protected

true if the pseudo-3d is enabled

Definition at line 53 of file TPie.h.

Referenced by DrawGhost(), GetHeight(), Init(), Paint(), and SetHeight().

Bool_t TPie::fIs3D

protected

Definition at line 52 of file TPie.h.

Referenced by DistancetoSlice(), DrawGhost(), ExecuteEvent(), Init(), and Paint().

TString TPie::fLabelFormat

protected

Definition at line 46 of file TPie.h.

Referenced by Init(), Paint(), and SetLabelFormat().

Float_t TPie::fLabelsOffset

protected

Definition at line 45 of file TPie.h.

Referenced by GetLabelsOffset(), Init(), Paint(), and SetLabelsOffset().

TLegend* TPie::fLegend

private

Subdivisions of the slices.

Definition at line 38 of file TPie.h.

Referenced by GetLegend(), Init(), MakeLegend(), and ~TPie().

Int_t TPie::fNvals

protected

Definition at line 50 of file TPie.h.

Referenced by DistancetoSlice(), Draw(), DrawGhost(), GetEntries(), Init(), MakeLegend(), MakeSlices(), Paint(), SavePrimitive(), SetEntryFillColor(), SetEntryFillStyle(), SetEntryLabel(), SetEntryLineColor(), SetEntryLineStyle(), SetEntryLineWidth(), SetEntryRadiusOffset(), SetEntryVal(), SetFillColors(), SetLabels(), SortSlices(), TPie(), and ~TPie().

TString TPie::fPercentFormat

protected

Definition at line 49 of file TPie.h.

Referenced by Init(), and SetPercentFormat().

TPieSlice** TPie::fPieSlices

protected

Definition at line 51 of file TPie.h.

Referenced by DistancetoSlice(), Draw(), DrawGhost(), ExecuteEvent(), GetSlice(), Init(), MakeLegend(), MakeSlices(), Paint(), SavePrimitive(), SetEntryFillColor(), SetEntryFillStyle(), SetEntryLabel(), SetEntryLineColor(), SetEntryLineStyle(), SetEntryLineWidth(), SetEntryRadiusOffset(), SetEntryVal(), SetFillColors(), SetLabels(), SortSlices(), TPie(), and ~TPie().

Double_t TPie::fRadius

protected

Definition at line 43 of file TPie.h.

Referenced by DistancetoPrimitive(), DistancetoSlice(), ExecuteEvent(), GetRadius(), Init(), Paint(), SavePrimitive(), SetCircle(), SetRadius(), and TPie().

Float_t* TPie::fSlices

private

Sum for the slice values.

Definition at line 37 of file TPie.h.

Referenced by DistancetoSlice(), DrawGhost(), ExecuteEvent(), Init(), MakeSlices(), Paint(), and ~TPie().

Float_t TPie::fSum

private

Definition at line 36 of file TPie.h.

Referenced by Init(), MakeSlices(), and Paint().

TString TPie::fValueFormat

protected

Definition at line 47 of file TPie.h.

Referenced by Init(), Paint(), and SetValueFormat().

Double_t TPie::fX

protected

Legend for this piechart.

Definition at line 41 of file TPie.h.

Referenced by DistancetoSlice(), ExecuteEvent(), GetX(), Init(), Paint(), SavePrimitive(), SetCircle(), SetX(), and TPie().

Double_t TPie::fY

protected

Definition at line 42 of file TPie.h.

Referenced by DistancetoSlice(), ExecuteEvent(), GetY(), Init(), Paint(), SavePrimitive(), SetCircle(), SetY(), and TPie().

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

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

Public Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation