library: libGraf #include "TCrown.h"

# TCrown

class description - source file - inheritance tree (.pdf)

## class TCrown : public TEllipse

| Inheritance Chart:

`TObject`

`TAttLine`

`TAttFill`

<-

`TEllipse`

<-

`TCrown`

        public:

                          TCrown()
                          TCrown(Double_t x1, Double_t y1, Double_t radin, Double_t radout, Double_t phimin = 0, Double_t phimax = 360)
                          TCrown(const TCrown& crown)
                  virtual ~TCrown()
           static TClass* Class()
             virtual void Copy(TObject& crown) const
            virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
             virtual void DrawCrown(Double_t x1, Double_t y1, Double_t radin, Double_t radout, Double_t phimin = 0, Double_t phimax = 360, Option_t* option = "")
             virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py)
          virtual TClass* IsA() const
                  TCrown& operator=(const TCrown&)
             virtual void Paint(Option_t* option = "")
             virtual void SavePrimitive(ofstream& out, Option_t* option)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

### Data Members

## Class Description

      A crown is specified with the position of its centre, its inner/outer radius
      a minimum and maximum angle.
      The attributes of the outline line are given via TAttLine
      The attributes of the fill area are given via TAttFill

      Example
    {
       gROOT->Reset();
       TCanvas c1("c1","c1",400,400);
       TCrown cr1(.5,.5,.3,.4);
       cr1->SetLineStyle(2);
       cr1->SetLineWidth(4);
       cr1.Draw();
       TCrown cr2(.5,.5,.2,.3,45,315);
       cr2.SetFillColor(38);
       cr2.SetFillStyle(3010);
       cr2.Draw();
       TCrown cr3(.5,.5,.2,.3,-45,45);
       cr3.SetFillColor(50);
       cr3.SetFillStyle(3025);
       cr3.Draw();
       TCrown cr4(.5,.5,.0,.2);
       cr4.SetFillColor(4);
       cr4.SetFillStyle(3008);
       cr4.Draw();
    }

/* */

TCrown(): TEllipse()

    *-*-*-*-*-*-*-*-*-*-*crown  default constructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
    *-*                  ========================

TCrown(Double_t x1, Double_t y1,Double_t radin, Double_t radout,Double_t phimin,Double_t phimax) :TEllipse(x1,y1,radin,radout,phimin,phimax,0)

    *-*-*-*-*-*-*-*-*-*-*Crown  normal constructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
    *-*                  =======================
      x1,y1  : coordinates of centre of crown
      radin  : inner crown radius
      radout : outer crown radius
      phimin : min and max angle in degrees (default is 0-->360)
      phimax :

      When a crown sector only is drawn, the lines connecting the center
      of the crown to the edges are drawn by default. One can specify
      the drawing option "only" to not draw these lines.

TCrown(const TCrown &crown) : TEllipse(crown)

~TCrown()

     crown  default destructor

void Copy(TObject &crown) const

     Copy this crown to crown

Int_t DistancetoPrimitive(Int_t px, Int_t py)

     Compute distance from point px,py to a crown

     if crown is filled, return OK if we are inside
     otherwise, crown is found if near the crown edges

void DrawCrown(Double_t x1, Double_t y1,Double_t radin,Double_t radout,Double_t phimin,Double_t phimax,Option_t *option)

     Draw this crown with new coordinates

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

     Execute action corresponding to one event

      For the time being TEllipse::ExecuteEvent is OK

void Paint(Option_t *)

     Paint this crown with its current attributes

void SavePrimitive(ofstream &out, Option_t *)

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

### Inline Functions

                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
                TCrown& operator=(const TCrown&)

Author: Rene Brun 108/08/2002
Last update: root/graf:$Name: $:$Id: TCrown.cxx,v 1.4 2005/01/13 21:39:40 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *