Modify TArraw::DrawArrow to use the current arrow attributes in case

the default arguments arrowsize and option are specified.


git-svn-id: http://root.cern.ch/svn/root/trunk@7421 27541ba8-7e3a-0410-8455-c3a389f83636

graf/inc/TArrow.h

-// @(#)root/graf:$Name:  $:$Id: TArrow.h,v 1.4 2002/02/23 15:45:56 rdm Exp $
+// @(#)root/graf:$Name:  $:$Id: TArrow.h,v 1.5 2002/10/31 07:27:34 brun Exp $
 // Author: Rene Brun   17/10/95
 
 /*************************************************************************
@@ -47,7 +47,7 @@ public:
                 void   Copy(TObject &arrow) const;
         virtual void   Draw(Option_t *option="");
         virtual void   DrawArrow(Double_t x1, Double_t y1,Double_t x2 ,Double_t y2
-                               ,Float_t arrowsize=0.05 ,Option_t *option=">");
+                               ,Float_t arrowsize=0 ,Option_t *option="");
         Float_t        GetAngle() const {return fAngle;}
         Float_t        GetArrowSize() const {return fArrowSize;}
         Option_t      *GetOption() const { return fOption.Data();}

graf/src/TArrow.cxx

-// @(#)root/graf:$Name:  $:$Id: TArrow.cxx,v 1.7 2002/10/31 07:27:35 brun Exp $
+// @(#)root/graf:$Name:  $:$Id: TArrow.cxx,v 1.8 2003/04/02 14:14:08 brun Exp $
 // Author: Rene Brun   17/10/95
 
 /*************************************************************************
@@ -112,10 +112,20 @@ void TArrow::DrawArrow(Double_t x1, Double_t y1,Double_t x2, Double_t  y2,
 {
 //*-*-*-*-*-*-*-*-*-*-*Draw this arrow with new coordinates*-*-*-*-*-*-*-*-*-*
 //*-*                  ====================================
-   TArrow *newarrow = new TArrow(x1,y1,x2,y2,arrowsize,option);
+// if arrowsize is <= 0, arrowsize will be the current arrow size
+// if option="", option will be the current arrow option
+   
+   Float_t size = arrowsize;
+   if (size <= 0) size = fArrowSize;
+   if (size <= 0) size = 0.05;
+   const char* opt = option;
+   if (!opt || strlen(opt) == 0) opt = fOption.Data();
+   if (!opt || strlen(opt) == 0) opt = "|>";
+   TArrow *newarrow = new TArrow(x1,y1,x2,y2,size,opt);
+   newarrow->SetAngle(fAngle);
    TAttLine::Copy(*newarrow);
    TAttFill::Copy(*newarrow);
-   newarrow->AppendPad(option);
+   newarrow->AppendPad(opt);
 }
 
 //______________________________________________________________________________