TAttLine

class TAttLine

    public:

                      TAttLine()
                      TAttLine(Color_t lcolor, Style_t lstyle, Width_t lwidth)
                      TAttLine(const TAttLine&)
              virtual ~TAttLine()
       static TClass* Class()
                 void Copy(TAttLine& attline) const
                Int_t DistancetoLine(Int_t px, Int_t py, Double_t xp1, Double_t yp1, Double_t xp2, Double_t yp2)
      virtual Color_t GetLineColor() const
      virtual Style_t GetLineStyle() const
      virtual Width_t GetLineWidth() const
      virtual TClass* IsA() const
         virtual void Modify()
            TAttLine& operator=(const TAttLine&)
         virtual void ResetAttLine(Option_t* option = "")
         virtual void SaveLineAttributes(ofstream& out, const char* name, Int_t coldef = 1, Int_t stydef = 1, Int_t widdef = 1)
         virtual void SetLineAttributes()
         virtual void SetLineColor(Color_t lcolor)
         virtual void SetLineStyle(Style_t lstyle)
         virtual void SetLineWidth(Width_t lwidth)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)

Data Members

    protected:

      Color_t fLineColor  line color
      Style_t fLineStyle  line style
      Width_t fLineWidth  line width

Class Description

*-*-*-*-*-*-*-*-*-*-*-*-*Line Attributes class*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                      =====================
*-*  Line attributes are:
*-*    Line Color (see TAttFill for the list of colors)
*-*    Line Width expressed in pixel units
*-*    Line Style 1=solid, 2=dash, 3=dot-dot, 4=dash-dot. Additional line
*-*               styles can be defined using TStyle::SetLineStyleString.
*-*               Example:
*-*               gStyle->SetLineStyleString(5,"20 12 4 12");
*-*               gStyle->SetLineStyleString(6,"20 12 4 12 4 12 4 12");
*-*               gStyle->SetLineStyleString(7,"20 20");
*-*               gStyle->SetLineStyleString(8,"20 12 4 12 4 12");
*-*               gStyle->SetLineStyleString(9,"80 20");
*-*

*-*
*-*  This class is used (in general by secondary inheritance)
*-*  by many other classes (graphics, histograms).
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*-*AttLine default constructor*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ===========================
*-*  Default line attributes are taking from the current style
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*-*AttLine normal constructor*-*-*-*-*-*-*-*-*-*-*-*
*-*                      ===========================
*-*  Line attributes are taking from the argument list
*-*    color : must be one of the valid color index
*-*    style : 1=solid, 2=dash, 3=dash-dot, 4=dot-dot. New styles can be
*-*            defined using TStyle::SetLineStyleString.
*-*    width : expressed in pixel units
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*-*-*-*AttLine destructor*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
*-*                      =================

*-*-*-*-*-*-*-*-*Copy this line attributes to a new attline*-*-*-*-*-*-*-*-*
*-*              ==========================================

*-*-*-*-*-*-*-*-*-*-*Compute distance from point px,py to a line*-*-*-*-*-*
*-*                  ===========================================
*-*  Compute the closest distance of approach from point px,py to this line.
*-*  The distance is computed in pixels units.
*-*
*-*  Algorithm:
*-*
*-*    A(x1,y1)         P                             B(x2,y2)
*-*    ------------------------------------------------
*-*                     I
*-*                     I
*-*                     I
*-*                     I
*-*                    M(x,y)
*-*
*-*  Let us call  a = distance AM     A=a**2
*-*               b = distance BM     B=b**2
*-*               c = distance AB     C=c**2
*-*               d = distance PM     D=d**2
*-*               u = distance AP     U=u**2
*-*               v = distance BP     V=v**2     c = u + v
*-*
*-*  D = A - U
*-*  D = B - V  = B -(c-u)**2
*-*     ==> u = (A -B +C)/2c
*-*
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*

*-*-*-*-*-*-*-*-*-*Change current line attributes if necessary*-*-*-*-*-*-*
*-*                ===========================================

*-*-*-*-*-*-*-*-*Reset this line attributes to default values*-*-*-*-*-*-*
*-*              ============================================

 Save line attributes as C++ statement(s) on output stream out

*-*-*-*-*-*-*-*-*Invoke the DialogCanvas Line attributes*-*-*-*-*-*-*
*-*              =======================================

Inline Functions

            Color_t GetLineColor() const
            Style_t GetLineStyle() const
            Width_t GetLineWidth() const
               void SetLineColor(Color_t lcolor)
               void SetLineStyle(Style_t lstyle)
               void SetLineWidth(Width_t lwidth)
            TClass* Class()
            TClass* IsA() const
               void ShowMembers(TMemberInspector& insp, char* parent)
               void Streamer(TBuffer& b)
               void StreamerNVirtual(TBuffer& b)
           TAttLine TAttLine(const TAttLine&)
          TAttLine& operator=(const TAttLine&)