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Reference Guide
TColorWheel Class Reference

Draw the ROOT Color Wheel.

The wheel contains the recommended 216 colors to be used in web applications. The colors in the Color Wheel are created by TColor::CreateColorWheel.

Using this color set for your text, background or graphics will give your application a consistent appearance across different platforms and browsers.

Colors are grouped by hue, the aspect most important in human perception. Touching color chips have the same hue, but with different brightness and vividness.

Colors of slightly different hues clash. If you intend to display colors of the same hue together, you should pick them from the same group.

Each color chip is identified by a mnemonic (e.g. kYellow) and a number. The keywords, kRed, kBlue, kYellow, kPink, etc are defined in the header file Rtypes.h that is included in all ROOT other header files. We strongly recommend to use these keywords in your code instead of hardcoded color numbers, e.g.:

myObject.SetFillColor(kRed);
myObject.SetFillColor(kYellow-10);
myLine.SetLineColor(kMagenta+2);
@ kRed
Definition: Rtypes.h:64
@ kMagenta
Definition: Rtypes.h:64
@ kYellow
Definition: Rtypes.h:64

Definition at line 24 of file TColorWheel.h.

Public Member Functions

 TColorWheel ()
 constructor More...
 
virtual ~TColorWheel ()
 destructor More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 always return the color wheel More...
 
virtual void Draw (Option_t *option="")
 Paint the color wheel. More...
 
TCanvasGetCanvas () const
 
virtual Int_t GetColor (Int_t px, Int_t py) const
 Return the color number pointed by the mouse. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Return the color number pointed by the mouse. More...
 
virtual void Paint (Option_t *option="")
 Paint the color wheel. More...
 
virtual void SetCanvas (TCanvas *can)
 
- Public Member Functions inherited from TNamed
 TNamed ()
 
 TNamed (const char *name, const char *title)
 
 TNamed (const TNamed &named)
 TNamed copy ctor. More...
 
 TNamed (const TString &name, const TString &title)
 
virtual ~TNamed ()
 TNamed destructor. More...
 
virtual void Clear (Option_t *option="")
 Set name and title to empty strings (""). More...
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare two TNamed objects. More...
 
virtual void Copy (TObject &named) const
 Copy this to obj. More...
 
virtual void FillBuffer (char *&buffer)
 Encode TNamed into output buffer. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual ULong_t Hash () const
 Return hash value for this object. More...
 
virtual Bool_t IsSortable () const
 
virtual void ls (Option_t *option="") const
 List TNamed name and title. More...
 
TNamedoperator= (const TNamed &rhs)
 TNamed assignment operator. More...
 
virtual void Print (Option_t *option="") const
 Print TNamed name and title. More...
 
virtual void SetName (const char *name)
 Set the name of the TNamed. More...
 
virtual void SetNameTitle (const char *name, const char *title)
 Set all the TNamed parameters (name and title). More...
 
virtual void SetTitle (const char *title="")
 Set the title of the TNamed. More...
 
virtual Int_t Sizeof () const
 Return size of the TNamed part of the TObject. More...
 
- Public Member Functions inherited from TObject
 TObject ()
 TObject constructor. More...
 
 TObject (const TObject &object)
 TObject copy ctor. More...
 
virtual ~TObject ()
 TObject destructor. More...
 
void AbstractMethod (const char *method) const
 Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...
 
virtual void AppendPad (Option_t *option="")
 Append graphics object to current pad. More...
 
virtual void Browse (TBrowser *b)
 Browse object. May be overridden for another default action. More...
 
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. More...
 
virtual const char * ClassName () const
 Returns name of class to which the object belongs. More...
 
virtual void Clear (Option_t *="")
 
virtual TObjectClone (const char *newname="") const
 Make a clone of an object using the Streamer facility. More...
 
virtual Int_t Compare (const TObject *obj) const
 Compare abstract method. More...
 
virtual void Copy (TObject &object) const
 Copy this to obj. More...
 
virtual void Delete (Option_t *option="")
 Delete this object. More...
 
virtual Int_t DistancetoPrimitive (Int_t px, Int_t py)
 Computes distance from point (px,py) to the object. More...
 
virtual void Draw (Option_t *option="")
 Default Draw method for all objects. More...
 
virtual void DrawClass () const
 Draw class inheritance tree of the class to which this object belongs. More...
 
virtual TObjectDrawClone (Option_t *option="") const
 Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad). More...
 
virtual void Dump () const
 Dump contents of object on stdout. More...
 
virtual void Error (const char *method, const char *msgfmt,...) const
 Issue error message. More...
 
virtual void Execute (const char *method, const char *params, Int_t *error=0)
 Execute method on this object with the given parameter string, e.g. More...
 
virtual void Execute (TMethod *method, TObjArray *params, Int_t *error=0)
 Execute method on this object with parameters stored in the TObjArray. More...
 
virtual void ExecuteEvent (Int_t event, Int_t px, Int_t py)
 Execute action corresponding to an event at (px,py). More...
 
virtual void Fatal (const char *method, const char *msgfmt,...) const
 Issue fatal error message. More...
 
virtual TObjectFindObject (const char *name) const
 Must be redefined in derived classes. More...
 
virtual TObjectFindObject (const TObject *obj) const
 Must be redefined in derived classes. More...
 
virtual Option_tGetDrawOption () const
 Get option used by the graphics system to draw this object. More...
 
virtual const char * GetIconName () const
 Returns mime type name of object. More...
 
virtual const char * GetName () const
 Returns name of object. More...
 
virtual char * GetObjectInfo (Int_t px, Int_t py) const
 Returns string containing info about the object at position (px,py). More...
 
virtual Option_tGetOption () const
 
virtual const char * GetTitle () const
 Returns title of object. More...
 
virtual UInt_t GetUniqueID () const
 Return the unique object id. More...
 
virtual Bool_t HandleTimer (TTimer *timer)
 Execute action in response of a timer timing out. More...
 
virtual ULong_t Hash () const
 Return hash value for this object. More...
 
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. More...
 
virtual void Info (const char *method, const char *msgfmt,...) const
 Issue info message. More...
 
virtual Bool_t InheritsFrom (const char *classname) const
 Returns kTRUE if object inherits from class "classname". More...
 
virtual Bool_t InheritsFrom (const TClass *cl) const
 Returns kTRUE if object inherits from TClass cl. More...
 
virtual void Inspect () const
 Dump contents of this object in a graphics canvas. More...
 
void InvertBit (UInt_t f)
 
virtual Bool_t IsEqual (const TObject *obj) const
 Default equal comparison (objects are equal if they have the same address in memory). More...
 
virtual Bool_t IsFolder () const
 Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...
 
R__ALWAYS_INLINE Bool_t IsOnHeap () const
 
virtual Bool_t IsSortable () const
 
R__ALWAYS_INLINE Bool_t IsZombie () const
 
virtual void ls (Option_t *option="") const
 The ls function lists the contents of a class on stdout. 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...
 
virtual Bool_t Notify ()
 This method must be overridden to handle object notification. More...
 
void Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const
 Use this method to declare a method obsolete. More...
 
void operator delete (void *ptr)
 Operator delete. More...
 
void operator delete[] (void *ptr)
 Operator delete []. More...
 
voidoperator new (size_t sz)
 
voidoperator new (size_t sz, void *vp)
 
voidoperator new[] (size_t sz)
 
voidoperator new[] (size_t sz, void *vp)
 
TObjectoperator= (const TObject &rhs)
 TObject assignment operator. More...
 
virtual void Paint (Option_t *option="")
 This method must be overridden if a class wants to paint itself. More...
 
virtual void Pop ()
 Pop on object drawn in a pad to the top of the display list. More...
 
virtual void Print (Option_t *option="") const
 This method must be overridden when a class wants to print itself. More...
 
virtual Int_t Read (const char *name)
 Read contents of object with specified name from the current directory. More...
 
virtual void RecursiveRemove (TObject *obj)
 Recursively remove this object from a list. More...
 
void ResetBit (UInt_t f)
 
virtual void SaveAs (const char *filename="", Option_t *option="") const
 Save this object in the file specified by filename. More...
 
virtual void SavePrimitive (std::ostream &out, Option_t *option="")
 Save a primitive as a C++ statement(s) on output stream "out". More...
 
void SetBit (UInt_t f)
 
void SetBit (UInt_t f, Bool_t set)
 Set or unset the user status bits as specified in f. 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 SysError (const char *method, const char *msgfmt,...) const
 Issue system error message. More...
 
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. More...
 
virtual void Warning (const char *method, const char *msgfmt,...) const
 Issue warning message. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
 Write this object to the current directory. More...
 
virtual Int_t Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
 Write this object to the current directory. More...
 

Protected Member Functions

Int_t InCircles (Double_t x, Double_t y, Int_t coffset, Double_t angle) const
 Return the color number when the mouse point to a circle. More...
 
Int_t InGray (Double_t x, Double_t y) const
 Return the color number when the mouse point to the gray circle. More...
 
Int_t InRectangles (Double_t x, Double_t y, Int_t coffset, Double_t angle) const
 Return the color number when the mouse point to a rectangle. More...
 
void PaintCircle (Int_t coffset, Int_t n, Double_t x, Double_t y, Double_t ang) const
 Draw one color of type circle. More...
 
void PaintCircles (Int_t coffset, Double_t angle) const
 Draw all colors of type circle. More...
 
void PaintGray () const
 Draw the gray colors + white + black. More...
 
void PaintRectangles (Int_t coffset, Double_t angle) const
 Draw all colors of type rectangle. More...
 
void Rotate (Double_t x, Double_t y, Double_t &u, Double_t &v, Double_t ang) const
 Rotate point x,y with an angle=ang. More...
 
- 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). More...
 
void MakeZombie ()
 

Private Member Functions

 TColorWheel (const TColorWheel &org)
 
TColorWheeloperator= (const TColorWheel &rhs)
 

Private Attributes

TArcfArc
 ! pointer to utility arc More...
 
TCanvasfCanvas
 ! Canvas used to draw the Color Wheel More...
 
Double_t fDr
 Circles radius. More...
 
TGraphfGraph
 ! pointer to utility graph More...
 
TLinefLine
 ! pointer to utility line More...
 
Double_t fR0
 Minimum radius for circles. More...
 
Double_t fRgray
 Maximum radius of gray circle. More...
 
Double_t fRmax
 Maximum radius for rectangles. More...
 
Double_t fRmin
 Minimum radius for rectangles. More...
 
TTextfText
 ! pointer to utility text More...
 
Double_t fX [15]
 X coordinates of the center of circles. More...
 
Double_t fY [15]
 Y coordinates of the center of circles. More...
 

Additional Inherited Members

- Public Types inherited from TObject
enum  {
  kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 ,
  kBitMask = 0x00ffffff
}
 
enum  { kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) }
 
enum  EDeprecatedStatusBits { kObjInCanvas = BIT(3) }
 
enum  EStatusBits {
  kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) ,
  kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13)
}
 
- Static Public Member Functions inherited from TObject
static Long_t GetDtorOnly ()
 Return destructor only flag. More...
 
static Bool_t GetObjectStat ()
 Get status of object stat flag. More...
 
static void SetDtorOnly (void *obj)
 Set destructor only flag. More...
 
static void SetObjectStat (Bool_t stat)
 Turn on/off tracking of objects in the TObjectTable. More...
 
- Protected Attributes inherited from TNamed
TString fName
 
TString fTitle
 

#include <TColorWheel.h>

Inheritance diagram for TColorWheel:
[legend]

Constructor & Destructor Documentation

◆ TColorWheel() [1/2]

TColorWheel::TColorWheel ( const TColorWheel org)
private

◆ TColorWheel() [2/2]

TColorWheel::TColorWheel ( )

constructor

Definition at line 65 of file TColorWheel.cxx.

◆ ~TColorWheel()

TColorWheel::~TColorWheel ( )
virtual

destructor

Definition at line 99 of file TColorWheel.cxx.

Member Function Documentation

◆ DistancetoPrimitive()

Int_t TColorWheel::DistancetoPrimitive ( Int_t  px,
Int_t  py 
)
virtual

always return the color wheel

Reimplemented from TObject.

Definition at line 111 of file TColorWheel.cxx.

◆ Draw()

void TColorWheel::Draw ( Option_t option = "")
virtual

Paint the color wheel.

Reimplemented from TObject.

Definition at line 120 of file TColorWheel.cxx.

◆ GetCanvas()

TCanvas * TColorWheel::GetCanvas ( ) const
inline

Definition at line 58 of file TColorWheel.h.

◆ GetColor()

Int_t TColorWheel::GetColor ( Int_t  px,
Int_t  py 
) const
virtual

Return the color number pointed by the mouse.

Definition at line 135 of file TColorWheel.cxx.

◆ GetObjectInfo()

char * TColorWheel::GetObjectInfo ( Int_t  px,
Int_t  py 
) const
virtual

Return the color number pointed by the mouse.

Reimplemented from TObject.

Definition at line 160 of file TColorWheel.cxx.

◆ InCircles()

Int_t TColorWheel::InCircles ( Double_t  x,
Double_t  y,
Int_t  coffset,
Double_t  angle 
) const
protected

Return the color number when the mouse point to a circle.

Definition at line 182 of file TColorWheel.cxx.

◆ InGray()

Int_t TColorWheel::InGray ( Double_t  x,
Double_t  y 
) const
protected

Return the color number when the mouse point to the gray circle.

Definition at line 199 of file TColorWheel.cxx.

◆ InRectangles()

Int_t TColorWheel::InRectangles ( Double_t  x,
Double_t  y,
Int_t  coffset,
Double_t  angle 
) const
protected

Return the color number when the mouse point to a rectangle.

Definition at line 215 of file TColorWheel.cxx.

◆ operator=()

TColorWheel & TColorWheel::operator= ( const TColorWheel rhs)
private

◆ Paint()

void TColorWheel::Paint ( Option_t option = "")
virtual

Paint the color wheel.

Reimplemented from TObject.

Definition at line 230 of file TColorWheel.cxx.

◆ PaintCircle()

void TColorWheel::PaintCircle ( Int_t  coffset,
Int_t  n,
Double_t  x,
Double_t  y,
Double_t  ang 
) const
protected

Draw one color of type circle.

Definition at line 263 of file TColorWheel.cxx.

◆ PaintCircles()

void TColorWheel::PaintCircles ( Int_t  coffset,
Double_t  angle 
) const
protected

Draw all colors of type circle.

Definition at line 284 of file TColorWheel.cxx.

◆ PaintGray()

void TColorWheel::PaintGray ( ) const
protected

Draw the gray colors + white + black.

Definition at line 394 of file TColorWheel.cxx.

◆ PaintRectangles()

void TColorWheel::PaintRectangles ( Int_t  coffset,
Double_t  angle 
) const
protected

Draw all colors of type rectangle.

Definition at line 311 of file TColorWheel.cxx.

◆ Rotate()

void TColorWheel::Rotate ( Double_t  x,
Double_t  y,
Double_t u,
Double_t v,
Double_t  ang 
) const
protected

Rotate point x,y with an angle=ang.

Definition at line 433 of file TColorWheel.cxx.

◆ SetCanvas()

virtual void TColorWheel::SetCanvas ( TCanvas can)
inlinevirtual

Definition at line 62 of file TColorWheel.h.

Member Data Documentation

◆ fArc

TArc* TColorWheel::fArc
private

! pointer to utility arc

Definition at line 35 of file TColorWheel.h.

◆ fCanvas

TCanvas* TColorWheel::fCanvas
private

! Canvas used to draw the Color Wheel

Definition at line 34 of file TColorWheel.h.

◆ fDr

Double_t TColorWheel::fDr
private

Circles radius.

Definition at line 30 of file TColorWheel.h.

◆ fGraph

TGraph* TColorWheel::fGraph
private

! pointer to utility graph

Definition at line 38 of file TColorWheel.h.

◆ fLine

TLine* TColorWheel::fLine
private

! pointer to utility line

Definition at line 36 of file TColorWheel.h.

◆ fR0

Double_t TColorWheel::fR0
private

Minimum radius for circles.

Definition at line 29 of file TColorWheel.h.

◆ fRgray

Double_t TColorWheel::fRgray
private

Maximum radius of gray circle.

Definition at line 31 of file TColorWheel.h.

◆ fRmax

Double_t TColorWheel::fRmax
private

Maximum radius for rectangles.

Definition at line 28 of file TColorWheel.h.

◆ fRmin

Double_t TColorWheel::fRmin
private

Minimum radius for rectangles.

Definition at line 27 of file TColorWheel.h.

◆ fText

TText* TColorWheel::fText
private

! pointer to utility text

Definition at line 37 of file TColorWheel.h.

◆ fX

Double_t TColorWheel::fX[15]
private

X coordinates of the center of circles.

Definition at line 32 of file TColorWheel.h.

◆ fY

Double_t TColorWheel::fY[15]
private

Y coordinates of the center of circles.

Definition at line 33 of file TColorWheel.h.

Libraries for TColorWheel:
[legend]

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