library: libGraf
#include "TPolyLine.h"

TPolyLine

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

class TPolyLine : public TObject, public TAttLine, public TAttFill

Inheritance Chart:

TObject

TAttLine

TAttFill

TPolyLine

TCurlyLine

TCurlyArc


    protected:

      TPolyLine& operator=(const TPolyLine&)

    public:

                        TPolyLine()
                        TPolyLine(Int_t n, Option_t* option = "")
                        TPolyLine(Int_t n, Float_t* x, Float_t* y, Option_t* option = "")
                        TPolyLine(Int_t n, Double_t* x, Double_t* y, Option_t* option = "")
                        TPolyLine(const TPolyLine& polyline)
                virtual ~TPolyLine()
         static TClass* Class()
           virtual void Copy(TObject& polyline) const
          virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
           virtual void Draw(Option_t* option = "")
           virtual void DrawPolyLine(Int_t n, Double_t* x, Double_t* y, Option_t* option = "")
           virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py)
          virtual Int_t GetLastPoint() const
                  Int_t GetN() const
      virtual Option_t* GetOption() const
              Double_t* GetX() const
              Double_t* GetY() const
        virtual TClass* IsA() const
           virtual void ls(Option_t* option = "") const
          virtual Int_t Merge(TCollection* list)
           virtual void Paint(Option_t* option = "")
           virtual void PaintPolyLine(Int_t n, Double_t* x, Double_t* y, Option_t* option = "")
           virtual void PaintPolyLineNDC(Int_t n, Double_t* x, Double_t* y, Option_t* option = "")
           virtual void Print(Option_t* option = "") const
           virtual void SavePrimitive(ostream& out, Option_t* option = "")
          virtual Int_t SetNextPoint(Double_t x, Double_t y)
           virtual void SetOption(Option_t* option = "")
           virtual void SetPoint(Int_t point, Double_t x, Double_t y)
           virtual void SetPolyLine(Int_t n)
           virtual void SetPolyLine(Int_t n, Float_t* x, Float_t* y, Option_t* option = "")
           virtual void SetPolyLine(Int_t n, Double_t* x, Double_t* y3, Option_t* option = "")
           virtual void ShowMembers(TMemberInspector& insp, char* parent)
          virtual Int_t Size() const
           virtual void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)

Data Members


    protected:

          Int_t fN          Number of points
          Int_t fLastPoint  The index of the last filled point
      Double_t* fX          [fN] Array of X coordinates
      Double_t* fY          [fN] Array of Y coordinates
        TString fOption     options

Class Description

______________________________________________________________________________

  a PolyLine is defined by an array on N points in a 2-D space.

 One can draw the contour of the polyline or/and its fill area.
 Example:
{
   Double_t x[5] = {.2,.7,.6,.25,.2};
   Double_t y[5] = {.5,.1,.9,.7,.5};
   TPolyLine *pline = new TPolyLine(5,x,y);
   pline->SetFillColor(38);
   pline->SetLineColor(2);
   pline->SetLineWidth(4);
   pline->Draw("f");
   pline->Draw();
}

TPolyLine()

 PolyLine default constructor.

TPolyLine(Int_t n, Option_t *option)

 PolyLine normal constructor without initialisation.

TPolyLine(Int_t n, Float_t *x, Float_t *y, Option_t *option)

 PolyLine normal constructor.

TPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option)

 PolyLine normal constructor.

TPolyLine& operator=(const TPolyLine& pl)

assignment operator

~TPolyLine()

 PolyLine default destructor.

TPolyLine(const TPolyLine &polyline)

 PolyLine copy constructor.

void Copy(TObject &obj)

 Copy this polyline to polyline.

Int_t DistancetoPrimitive(Int_t px, Int_t py)

 Compute distance from point px,py to a polyline.

  Compute the closest distance of approach from point px,py to each segment
  of the polyline.
  Returns when the distance found is below DistanceMaximum.
  The distance is computed in pixels units.

void Draw(Option_t *option)

 Draw this polyline with its current attributes.

void DrawPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option)

 Draw this polyline with new coordinates.

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

 Execute action corresponding to one event.

  This member function is called when a polyline is clicked with the locator

  If Left button clicked on one of the line end points, this point
     follows the cursor until button is released.

  if Middle button clicked, the line is moved parallel to itself
     until the button is released.

void ls(Option_t *)

 List this polyline with its attributes.

Int_t Merge(TCollection *li)

 Merge polylines in the collection in this polyline

void Paint(Option_t *option)

 Paint this polyline with its current attributes.

void PaintPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option)

 Draw this polyline with new coordinates.

  if option = 'f' or 'F' the fill area is drawn
  default is to draw the lines only

void PaintPolyLineNDC(Int_t n, Double_t *x, Double_t *y, Option_t *option)

 Draw this polyline with new coordinates in NDC.

void Print(Option_t *)

 Dump this polyline with its attributes.

void SavePrimitive(ostream &out, Option_t *option /*= ""*/)

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

Int_t SetNextPoint(Double_t x, Double_t y)

 Set point following LastPoint to x, y.
 Returns index of the point (new last point).

void SetPoint(Int_t n, Double_t x, Double_t y)

 set point number n
 if n is greater than the current size, the arrays are automatically
 extended

void SetPolyLine(Int_t n)

 if n <= 0 the current arrays of points are deleted.

void SetPolyLine(Int_t n, Float_t *x, Float_t *y, Option_t *option)

 Set new values for this polyline.

 if n <= 0 the current arrays of points are deleted.

void SetPolyLine(Int_t n, Double_t *x, Double_t *y, Option_t *option)

 Set new values for this polyline.

 if n <= 0 the current arrays of points are deleted.

void Streamer(TBuffer &b)

 Stream a class object.

Int_t GetLastPoint()

Int_t GetN()

void SetOption(Option_t *option="")

Int_t Size()

Author: Rene Brun 12/12/94
Last update: root/graf:$Name: $:$Id: TPolyLine.cxx,v 1.29 2006/07/09 05:27:54 brun Exp $
Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *

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