TColorGradient extends basic TColor.

Actually, this is not a simple color, but linear gradient + shadow for filled area. By inheriting from TColor, gradients can be placed inside gROOT's list of colors and use it in all TAttXXX descendants without modifying any existing code.

Shadow, of course, is not a property of any color, and gradient is not, but this is the best way to add new attributes to filled area without re-writing all the graphics code.

Definition at line 39 of file TColorGradient.h.

Classes
struct	Point

Public Types
enum	ECoordinateMode { kPadMode, kObjectBoundingMode }

typedef std::vector< Color_t >::size_type	SizeType_t

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) }

Public Member Functions
void	ResetColor (UInt_t nPoints, const Double_t points, const Color_t colorIndices)
	Reset color. More...

void	ResetColor (UInt_t nPoints, const Double_t points, const Double_t colorIndices)
	Reset color. More...

void	SetCoordinateMode (ECoordinateMode mode)
	Set coordinate mode. More...

ECoordinateMode	GetCoordinateMode () const
	Get coordinate mode. More...

SizeType_t	GetNumberOfSteps () const
	Get number of steps. More...

const Double_t *	GetColorPositions () const
	Get color positions. More...

const Double_t *	GetColors () const
	Get colors. More...

Public Member Functions inherited from TColor
	TColor ()
	Default constructor. More...

	TColor (Int_t color, Float_t r, Float_t g, Float_t b, const char *name="", Float_t a=1)
	Normal color constructor. More...

	TColor (Float_t r, Float_t g, Float_t b, Float_t a=1)
	Fast TColor constructor. More...

	TColor (const TColor &color)
	Color copy constructor. More...

virtual	~TColor ()
	Color destructor. More...

const char *	AsHexString () const
	Return color as hexadecimal string. More...

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

virtual void	GetRGB (Float_t &r, Float_t &g, Float_t &b) const

virtual void	GetHLS (Float_t &h, Float_t &l, Float_t &s) const

Int_t	GetNumber () const

ULong_t	GetPixel () const
	Return pixel value corresponding to this color. More...

Float_t	GetRed () const

Float_t	GetGreen () const

Float_t	GetBlue () const

Float_t	GetHue () const

Float_t	GetLight () const

Float_t	GetSaturation () const

Float_t	GetAlpha () const

virtual Float_t	GetGrayscale () const

virtual void	ls (Option_t *option="") const
	List this color with its attributes. More...

virtual void	Print (Option_t *option="") const
	Dump this color with its attributes. More...

virtual void	SetAlpha (Float_t a)

virtual void	SetRGB (Float_t r, Float_t g, Float_t b)
	Initialize this color and its associated colors. 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	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 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 Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

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

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current 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 void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). 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	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

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

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

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

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...

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...

Protected Member Functions
	TColorGradient ()

	TColorGradient (Color_t newColor, UInt_t nPoints, const Double_t points, const Color_t colorIndices, ECoordinateMode mode=kObjectBoundingMode)
	There is no way to validate parameters here, so it's up to user to pass correct arguments. More...

	TColorGradient (Color_t newColor, UInt_t nPoints, const Double_t points, const Double_t colors, ECoordinateMode mode=kObjectBoundingMode)
	There is no way to validate parameters here, so it's up to user to pass correct arguments. 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...

Private Member Functions
void	RegisterColor (Color_t colorIndex)
	Register color. More...

Private Attributes
std::vector< Double_t >	fColorPositions

std::vector< Double_t >	fColors

ECoordinateMode	fCoordinateMode

Additional Inherited Members
Static Public Member Functions inherited from TColor
static void	CreateColorWheel ()
	Static function steering the creation of all colors in the color wheel. More...

static void	CreateColorsGray ()
	Create the Gray scale colors in the Color Wheel. More...

static void	CreateColorsCircle (Int_t offset, const char name, UChar_t rgb)
	Create the "circle" colors in the color wheel. More...

static void	CreateColorsRectangle (Int_t offset, const char name, UChar_t rgb)
	Create the "rectangular" colors in the color wheel. More...

static Int_t	CreateGradientColorTable (UInt_t Number, Double_t Stops, Double_t Red, Double_t Green, Double_t Blue, UInt_t NColors, Float_t alpha=1.)
	Static function creating a color table with several connected linear gradients. More...

static Int_t	GetColorPalette (Int_t i)
	Static function returning the color number i in current palette. More...

static Int_t	GetNumberOfColors ()
	Static function returning number of colors in the color palette. More...

static void	InitializeColors ()
	Initialize colors used by the TCanvas based graphics (via TColor objects). More...

static void	HLS2RGB (Float_t h, Float_t l, Float_t s, Float_t &r, Float_t &g, Float_t &b)
	Static method to compute RGB from HLS. More...

static void	HLS2RGB (Int_t h, Int_t l, Int_t s, Int_t &r, Int_t &g, Int_t &b)
	Static method to compute RGB from HLS. More...

static void	HLStoRGB (Float_t h, Float_t l, Float_t s, Float_t &r, Float_t &g, Float_t &b)

static void	HSV2RGB (Float_t h, Float_t s, Float_t v, Float_t &r, Float_t &g, Float_t &b)
	Static method to compute RGB from HSV: More...

static void	RGB2HLS (Float_t r, Float_t g, Float_t b, Float_t &h, Float_t &l, Float_t &s)
	Static method to compute HLS from RGB. More...

static void	RGB2HLS (Int_t r, Int_t g, Int_t b, Int_t &h, Int_t &l, Int_t &s)
	Static method to compute HLS from RGB. More...

static void	RGBtoHLS (Float_t r, Float_t g, Float_t b, Float_t &h, Float_t &l, Float_t &s)

static void	RGB2HSV (Float_t r, Float_t g, Float_t b, Float_t &h, Float_t &s, Float_t &v)
	Static method to compute HSV from RGB. More...

static Int_t	GetColor (const char *hexcolor)
	Static method returning color number for color specified by hex color string of form: "#rrggbb", where rr, gg and bb are in hex between [0,FF], e.g. More...

static Int_t	GetColor (Float_t r, Float_t g, Float_t b)
	Static method returning color number for color specified by r, g and b. More...

static Int_t	GetColor (Int_t r, Int_t g, Int_t b)
	Static method returning color number for color specified by r, g and b. More...

static Int_t	GetColor (ULong_t pixel)
	Static method returning color number for color specified by system dependent pixel value. More...

static Int_t	GetColorBright (Int_t color)
	Static function: Returns the bright color number corresponding to n If the TColor object does not exist, it is created. More...

static Int_t	GetColorDark (Int_t color)
	Static function: Returns the dark color number corresponding to n If the TColor object does not exist, it is created. More...

static Int_t	GetColorTransparent (Int_t color, Float_t a)
	Static function: Returns the transparent color number corresponding to n. More...

static ULong_t	Number2Pixel (Int_t ci)
	Static method that given a color index number, returns the corresponding pixel value. More...

static ULong_t	RGB2Pixel (Int_t r, Int_t g, Int_t b)
	Convert r,g,b to graphics system dependent pixel value. More...

static ULong_t	RGB2Pixel (Float_t r, Float_t g, Float_t b)
	Convert r,g,b to graphics system dependent pixel value. More...

static void	Pixel2RGB (ULong_t pixel, Int_t &r, Int_t &g, Int_t &b)
	Convert machine dependent pixel value (obtained via RGB2Pixel or via Number2Pixel() or via TColor::GetPixel()) to r,g,b triplet. More...

static void	Pixel2RGB (ULong_t pixel, Float_t &r, Float_t &g, Float_t &b)
	Convert machine dependent pixel value (obtained via RGB2Pixel or via Number2Pixel() or via TColor::GetPixel()) to r,g,b triplet. More...

static const char *	PixelAsHexString (ULong_t pixel)
	Convert machine dependent pixel value (obtained via RGB2Pixel or via Number2Pixel() or via TColor::GetPixel()) to a hexadecimal string. More...

static void	SaveColor (std::ostream &out, Int_t ci)
	Save a color with index > 228 as a C++ statement(s) on output stream out. More...

static Bool_t	IsGrayscale ()
	Return whether all colors return grayscale values. More...

static void	SetGrayscale (Bool_t set=kTRUE)
	Set whether all colors should return grayscale values. More...

static void	SetPalette (Int_t ncolors, Int_t *colors, Float_t alpha=1.)
	Static function. More...

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 Attributes inherited from TColor
Int_t	fNumber

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

#include <TColorGradient.h>

Inheritance diagram for TColorGradient:

Collaboration diagram for TColorGradient:

Member Typedef Documentation

typedef std::vector<Color_t>::size_type TColorGradient::SizeType_t

Definition at line 41 of file TColorGradient.h.

Member Enumeration Documentation

enum TColorGradient::ECoordinateMode

Enumerator
kPadMode
kObjectBoundingMode

Definition at line 48 of file TColorGradient.h.

Constructor & Destructor Documentation

TColorGradient::TColorGradient ( )

protected

TColorGradient::TColorGradient	(	Color_t	colorIndex,
		UInt_t	nPoints,
		const Double_t *	points,
		const Color_t *	indices,
		ECoordinateMode	mode = `kObjectBoundingMode`
	)

protected

There is no way to validate parameters here, so it's up to user to pass correct arguments.

Definition at line 46 of file TColorGradient.cxx.

TColorGradient::TColorGradient	(	Color_t	colorIndex,
		UInt_t	nPoints,
		const Double_t *	points,
		const Double_t *	colors,
		ECoordinateMode	mode = `kObjectBoundingMode`
	)