Draw all kinds of Arrows.

The different arrow's formats are explained in TArrow::TArrow. The picture below gives some examples.

Once an arrow is drawn on the screen:

One can click on one of the edges and move this edge.
One can click on any other arrow part to move the entire arrow.

 
void arrows(){
   TCanvas *c1 = new TCanvas("c1");
   c1->Range(0,0,1,1);
 
   TPaveLabel *par = new TPaveLabel(0.1,0.8,0.9,0.95,"Examples of various arrows formats");
   par->SetFillColor(42);
   par->Draw();
 
   TArrow *ar1 = new TArrow(0.1,0.1,0.1,0.7);
   ar1->Draw();
   TArrow *ar2 = new TArrow(0.2,0.1,0.2,0.7,0.05,"|>");
   ar2->SetAngle(40);
   ar2->SetLineWidth(2);
   ar2->Draw();
   TArrow *ar3 = new TArrow(0.3,0.1,0.3,0.7,0.05,"<|>");
   ar3->SetAngle(40);
   ar3->SetLineWidth(2);
   ar3->Draw();
   TArrow *ar4 = new TArrow(0.46,0.7,0.82,0.42,0.07,"|>");
   ar4->SetAngle(60);
   ar4->SetLineWidth(2);
   ar4->SetFillColor(2);
   ar4->Draw();
   TArrow *ar5 = new TArrow(0.4,0.25,0.95,0.25,0.15,"<|>");
   ar5->SetAngle(60);
   ar5->SetLineWidth(4);
   ar5->SetLineColor(4);
   ar5->SetFillStyle(3008);
   ar5->SetFillColor(2);
   ar5->Draw();
}

Definition at line 29 of file TArrow.h.

Public Member Functions
	TArrow ()
	Arrow default constructor.

	TArrow (const TArrow &arrow)
	Copy constructor.

	TArrow (Double_t x1, Double_t y1, Double_t x2, Double_t y2, Float_t arrowsize=0.05, Option_t *option=">")
	Arrow normal constructor.

virtual	~TArrow ()
	Arrow default destructor.

void	Copy (TObject &arrow) const
	Copy this arrow to arrow.

virtual void	Draw (Option_t *option="")
	Draw this arrow with its current attributes.

virtual void	DrawArrow (Double_t x1, Double_t y1, Double_t x2, Double_t y2, Float_t arrowsize=0, Option_t *option="")
	Draw this arrow with new coordinates.

Float_t	GetAngle () const

Float_t	GetArrowSize () const

Option_t *	GetOption () const

virtual void	Paint (Option_t *option="")
	Paint this arrow with its current attributes.

virtual void	PaintArrow (Double_t x1, Double_t y1, Double_t x2, Double_t y2, Float_t arrowsize=0.05, Option_t *option=">")
	Draw this arrow.

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

virtual void	SetAngle (Float_t angle=60)

virtual void	SetArrowSize (Float_t arrowsize=0.05)

virtual void	SetOption (Option_t *option=">")

Public Member Functions inherited from TLine
	TLine ()

	TLine (const TLine &line)
	Line copy constructor.

	TLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Line normal constructor.

virtual	~TLine ()=default

void	Copy (TObject &line) const
	Copy this line to line.

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Compute distance from point px,py to a line.

virtual TLine *	DrawLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates.

virtual TLine *	DrawLineNDC (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates in NDC.

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to one event.

virtual Rectangle_t	GetBBox ()
	Return the bounding Box of the Line.

virtual TPoint	GetBBoxCenter ()
	Return the center of the BoundingBox as TPoint in pixels.

Double_t	GetX1 () const

Double_t	GetX2 () const

Double_t	GetY1 () const

Double_t	GetY2 () const

Bool_t	IsHorizontal ()
	Check whether this line is to be drawn horizontally.

Bool_t	IsVertical ()
	Check whether this line is to be drawn vertically.

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

TLine &	operator= (const TLine &src)
	Assignment operator.

virtual void	PaintLine (Double_t x1, Double_t y1, Double_t x2, Double_t y2)
	Draw this line with new coordinates.

virtual void	PaintLineNDC (Double_t u1, Double_t v1, Double_t u2, Double_t v2)
	Draw this line with new coordinates in NDC.

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

virtual void	SetBBoxCenter (const TPoint &p)
	Set center of the BoundingBox.

virtual void	SetBBoxCenterX (const Int_t x)
	Set X coordinate of the center of the BoundingBox.

virtual void	SetBBoxCenterY (const Int_t y)
	Set Y coordinate of the center of the BoundingBox.

virtual void	SetBBoxX1 (const Int_t x)
	Set left hand side of BoundingBox to a value (resize in x direction on left)

virtual void	SetBBoxX2 (const Int_t x)
	Set right hand side of BoundingBox to a value (resize in x direction on right)

virtual void	SetBBoxY1 (const Int_t y)
	Set top of BoundingBox to a value (resize in y direction on top)

virtual void	SetBBoxY2 (const Int_t y)
	Set bottom of BoundingBox to a value (resize in y direction on bottom)

void	SetHorizontal (Bool_t set=kTRUE)
	Force the line to be drawn horizontally.

virtual void	SetNDC (Bool_t isNDC=kTRUE)
	Set NDC mode on if isNDC = kTRUE, off otherwise.

void	SetVertical (Bool_t set=kTRUE)
	Force the line to be drawn vertically.

virtual void	SetX1 (Double_t x1)

virtual void	SetX2 (Double_t x2)

virtual void	SetY1 (Double_t y1)

virtual void	SetY2 (Double_t y2)

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	Clear (Option_t *="")

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

virtual Int_t	Compare (const TObject *obj) const
	Compare abstract method.

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 for instance with: `gROOT->SetSelectedPad(gPad)`.

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=0)
	Execute method on this object with the given parameter string, e.g.

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	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 const char *	GetName () const
	Returns name of object.

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

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

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.

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

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

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

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

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

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

void	InvertBit (UInt_t f)

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

virtual Bool_t	IsSortable () 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.

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)
	Operator delete [].

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.

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=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory.

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

Public Member Functions inherited from TAttLine
	TAttLine ()
	AttLine default constructor.

	TAttLine (Color_t lcolor, Style_t lstyle, Width_t lwidth)
	AttLine normal constructor.

virtual	~TAttLine ()
	AttLine destructor.

void	Copy (TAttLine &attline) const
	Copy this line attributes to a new TAttLine.

Int_t	DistancetoLine (Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
	Compute distance from point px,py to a line.

virtual Color_t	GetLineColor () const
	Return the line color.

virtual Style_t	GetLineStyle () const
	Return the line style.

virtual Width_t	GetLineWidth () const
	Return the line width.

virtual void	Modify ()
	Change current line attributes if necessary.

virtual void	ResetAttLine (Option_t *option="")
	Reset this line attributes to default values.

virtual void	SaveLineAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
	Save line attributes as C++ statement(s) on output stream out.

virtual void	SetLineAttributes ()
	Invoke the DialogCanvas Line attributes.

virtual void	SetLineColor (Color_t lcolor)
	Set the line color.

virtual void	SetLineColorAlpha (Color_t lcolor, Float_t lalpha)
	Set a transparent line color.

virtual void	SetLineStyle (Style_t lstyle)
	Set the line style.

virtual void	SetLineWidth (Width_t lwidth)
	Set the line width.

Public Member Functions inherited from TAttBBox2D
virtual	~TAttBBox2D ()

Public Member Functions inherited from TAttFill
	TAttFill ()
	AttFill default constructor.

	TAttFill (Color_t fcolor, Style_t fstyle)
	AttFill normal constructor.

virtual	~TAttFill ()
	AttFill destructor.

void	Copy (TAttFill &attfill) const
	Copy this fill attributes to a new TAttFill.

virtual Color_t	GetFillColor () const
	Return the fill area color.

virtual Style_t	GetFillStyle () const
	Return the fill area style.

virtual Bool_t	IsTransparent () const

virtual void	Modify ()
	Change current fill area attributes if necessary.

virtual void	ResetAttFill (Option_t *option="")
	Reset this fill attributes to default values.

virtual void	SaveFillAttributes (std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
	Save fill attributes as C++ statement(s) on output stream out.

virtual void	SetFillAttributes ()
	Invoke the DialogCanvas Fill attributes.

virtual void	SetFillColor (Color_t fcolor)
	Set the fill area color.

virtual void	SetFillColorAlpha (Color_t fcolor, Float_t falpha)
	Set a transparent fill color.

virtual void	SetFillStyle (Style_t fstyle)
	Set the fill area style.

Static Public Member Functions
static Float_t	GetDefaultAngle ()
	Get default angle.

static Float_t	GetDefaultArrowSize ()
	Get default arrow size.

static Option_t *	GetDefaultOption ()
	Get default option.

static void	SetDefaultAngle (Float_t Angle)
	Set default angle.

static void	SetDefaultArrowSize (Float_t ArrowSize)
	Set default arrow sive.

static void	SetDefaultOption (Option_t *Option)
	Set default option.

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

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

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

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

Protected Attributes
Float_t	fAngle
	Arrow opening angle (degrees)

Float_t	fArrowSize
	Arrow Size.

TString	fOption
	Arrow shapes.

Protected Attributes inherited from TLine
Double_t	fX1 {0}
	X of 1st point.

Double_t	fX2 {0}
	X of 2nd point.

Double_t	fY1 {0}
	Y of 1st point.

Double_t	fY2 {0}
	Y of 2nd point.

Protected Attributes inherited from TAttLine
Color_t	fLineColor
	Line color.

Style_t	fLineStyle
	Line style.

Width_t	fLineWidth
	Line width.

Protected Attributes inherited from TAttFill
Color_t	fFillColor
	Fill area color.

Style_t	fFillStyle
	Fill area style.

Static Protected Attributes
static Float_t	fgDefaultAngle = 60
	Default Arrow opening angle (degrees)

static Float_t	fgDefaultArrowSize = 0.05
	Default Arrow Size.

static TString	fgDefaultOption = ">"
	Default Arrow shapes.

Additional Inherited Members
Public Types inherited from TLine
enum	{ kLineNDC = BIT(14) , kVertical = BIT(15) , kHorizontal = BIT(16) }

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) }

Protected Types inherited from TObject
enum	{ kOnlyPrepStep = BIT(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 <TArrow.h>

Inheritance diagram for TArrow:

[legend]

Constructor & Destructor Documentation

◆ TArrow() [1/3]

TArrow::TArrow ( )

Arrow default constructor.

Definition at line 47 of file TArrow.cxx.

◆ TArrow() [2/3]

TArrow::TArrow	(	Double_t	x1,
		Double_t	y1,
		Double_t	x2,
		Double_t	y2,
		Float_t	arrowsize = `0.05`,
		Option_t *	option = `">"`
	)

Arrow normal constructor.

Define an arrow between points x1,y1 and x2,y2 the arrowsize is in percentage of the pad height Opening angle between the two sides of the arrow is fAngle (60 degrees)

option = ">"      -------->
option = "|->"    |------->
option = "<"      <--------
option = "<-|"    <-------|
option = "->-"    ---->----
option = "-<-"    ----<----
option = "-|>-"   ---|>----
option = "<>"     <------->
option = "<|>"    <|-----|>  arrow defined by a triangle

Note:

If FillColor == 0 an open triangle is drawn, otherwise a full triangle is drawn with the fill color. The default is filled with LineColor
The "Begin" and "end" bars options can be combined with any other options.
The 9 options described above cannot be mixed.

Definition at line 77 of file TArrow.cxx.

◆ TArrow() [3/3]

TArrow::TArrow ( const TArrow & arrow )

Copy constructor.

Definition at line 98 of file TArrow.cxx.

◆ ~TArrow()

TArrow::~TArrow ( )

virtual

Arrow default destructor.

Definition at line 91 of file TArrow.cxx.

Member Function Documentation

◆ Copy()

void TArrow::Copy ( TObject & arrow ) const

virtual

Copy this arrow to arrow.

Reimplemented from TObject.

Definition at line 108 of file TArrow.cxx.

◆ Draw()

void TArrow::Draw ( Option_t * option = "" )

virtual

Draw this arrow with its current attributes.

Reimplemented from TObject.

Definition at line 120 of file TArrow.cxx.

◆ DrawArrow()

void TArrow::DrawArrow	(	Double_t	x1,
		Double_t	y1,
		Double_t	x2,
		Double_t	y2,
		Float_t	arrowsize = `0`,
		Option_t *	option = `""`
	)

virtual

Draw this arrow with new coordinates.

if arrowsize is <= 0, arrowsize will be the current arrow size
if option="", option will be the current arrow option

Definition at line 135 of file TArrow.cxx.

◆ GetAngle()

Float_t TArrow::GetAngle ( ) const

inline

Definition at line 51 of file TArrow.h.

◆ GetArrowSize()

Float_t TArrow::GetArrowSize ( ) const

inline

Definition at line 52 of file TArrow.h.

◆ GetDefaultAngle()

Float_t TArrow::GetDefaultAngle ( )

static

Get default angle.

Definition at line 407 of file TArrow.cxx.

◆ GetDefaultArrowSize()

Float_t TArrow::GetDefaultArrowSize ( )

static

Get default arrow size.

Definition at line 417 of file TArrow.cxx.

◆ GetDefaultOption()

Option_t * TArrow::GetDefaultOption ( )

static

Get default option.

Definition at line 427 of file TArrow.cxx.

◆ GetOption()

Option_t * TArrow::GetOption ( ) const

inlinevirtual

Reimplemented from TObject.

Definition at line 53 of file TArrow.h.

◆ Paint()

void TArrow::Paint ( Option_t * option = "" )

virtual

Paint this arrow with its current attributes.

Reimplemented from TLine.

Definition at line 156 of file TArrow.cxx.

◆ PaintArrow()

void TArrow::PaintArrow	(	Double_t	x1,
		Double_t	y1,
		Double_t	x2,
		Double_t	y2,
		Float_t	arrowsize = `0.05`,
		Option_t *	option = `">"`
	)

virtual

Draw this arrow.

Definition at line 174 of file TArrow.cxx.

◆ SavePrimitive()

void TArrow::SavePrimitive	(	std::ostream &	out,
		Option_t *	option = `""`
	)

virtual

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

Reimplemented from TLine.

Definition at line 351 of file TArrow.cxx.

◆ SetAngle()

virtual void TArrow::SetAngle ( Float_t angle = 60 )

inlinevirtual

Definition at line 58 of file TArrow.h.

◆ SetArrowSize()

virtual void TArrow::SetArrowSize ( Float_t arrowsize = 0.05 )

inlinevirtual

Definition at line 59 of file TArrow.h.

◆ SetDefaultAngle()

void TArrow::SetDefaultAngle ( Float_t Angle )

static

Set default angle.

Definition at line 379 of file TArrow.cxx.

◆ SetDefaultArrowSize()

void TArrow::SetDefaultArrowSize ( Float_t ArrowSize )

static

Set default arrow sive.

Definition at line 388 of file TArrow.cxx.

◆ SetDefaultOption()

void TArrow::SetDefaultOption ( Option_t * Option )

static

Set default option.

Definition at line 397 of file TArrow.cxx.

◆ SetOption()

virtual void TArrow::SetOption ( Option_t * option = ">" )

inlinevirtual

Definition at line 60 of file TArrow.h.

Member Data Documentation

◆ fAngle

Float_t TArrow::fAngle

protected

Arrow opening angle (degrees)

Definition at line 31 of file TArrow.h.

◆ fArrowSize

Float_t TArrow::fArrowSize

protected

Arrow Size.

Definition at line 32 of file TArrow.h.

◆ fgDefaultAngle

Float_t TArrow::fgDefaultAngle = 60

staticprotected

Default Arrow opening angle (degrees)

Definition at line 35 of file TArrow.h.

◆ fgDefaultArrowSize

Float_t TArrow::fgDefaultArrowSize = 0.05

staticprotected

Default Arrow Size.

Definition at line 36 of file TArrow.h.

◆ fgDefaultOption

TString TArrow::fgDefaultOption = ">"

staticprotected

Default Arrow shapes.

Definition at line 37 of file TArrow.h.

◆ fOption

TString TArrow::fOption

protected

Arrow shapes.

Definition at line 33 of file TArrow.h.

Libraries for TArrow:

[legend]

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

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

Public Member Functions

Static Public Member Functions

Protected Attributes

Static Protected Attributes

Additional Inherited Members

Constructor & Destructor Documentation

◆ TArrow() [1/3]

◆ TArrow() [2/3]

◆ TArrow() [3/3]

◆ ~TArrow()

Member Function Documentation

◆ Copy()

◆ Draw()

◆ DrawArrow()

◆ GetAngle()

◆ GetArrowSize()

◆ GetDefaultAngle()

◆ GetDefaultArrowSize()

◆ GetDefaultOption()

◆ GetOption()

◆ Paint()

◆ PaintArrow()

◆ SavePrimitive()

◆ SetAngle()

◆ SetArrowSize()

◆ SetDefaultAngle()

◆ SetDefaultArrowSize()

◆ SetDefaultOption()

◆ SetOption()

Member Data Documentation

◆ fAngle

◆ fArrowSize

◆ fgDefaultAngle

◆ fgDefaultArrowSize

◆ fgDefaultOption

◆ fOption