From aa8231b0a002f6458422c17e3a3cda62526ce1f8 Mon Sep 17 00:00:00 2001
From: nick <nick@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Sat, 18 Mar 2006 01:48:34 +0000
Subject: [PATCH] 18-mar-2006 NvE Support for display of selected track array
 introduced in AliHelix.                 Also copy ctor of AliHelix made
 complete for new datamembers.

---
 RALICE/AliHelix.cxx | 40 ++++++++++++++++++++++++++++++++++++++++
 RALICE/AliHelix.h   |  3 ++-
 RALICE/history.txt  |  2 ++
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/RALICE/AliHelix.cxx b/RALICE/AliHelix.cxx
index 5b49121db24..e3a1a1eb339 100644
--- a/RALICE/AliHelix.cxx
+++ b/RALICE/AliHelix.cxx
@@ -183,6 +183,11 @@ AliHelix::AliHelix(const AliHelix& h) : THelix(h)
 // Copy constructor
  fB=h.fB;
  fRefresh=h.fRefresh;
+ fTofmax=h.fTofmax;
+ fMstyle=h.fMstyle;
+ fMsize=h.fMsize;
+ fMcol=h.fMcol;
+ fEnduse=h.fEnduse;
 }
 ///////////////////////////////////////////////////////////////////////////
 void AliHelix::SetB(Ali3Vector& b)
@@ -755,6 +760,41 @@ void AliHelix::Display(AliEvent* evt,Double_t* range,Int_t iaxis,Double_t scale)
  }
 }
 ///////////////////////////////////////////////////////////////////////////
+void AliHelix::Display(TObjArray* arr,Double_t* range,Int_t iaxis,Double_t scale)
+{
+// Display the helix curves of all tracks in the specified array.
+// A convenient way to obtain an array with selected tracks from e.g. an AliEvent
+// is to make use of its GetTracks() selection facility.
+// Various arrays can be displayed together or individually; please refer to
+// the memberfunction Refresh() for further details.
+// Please refer to the track display memberfunction for further details
+// on the input arguments.
+// 
+// The default values are range=0, iaxis=3 and scale=-1.
+//
+// Note :
+// ------
+// Before any display activity, a TCanvas and a TView have to be initiated
+// first by the user like for instance
+// 
+// TCanvas* c1=new TCanvas("c1","c1");
+// TView* view=new TView(1);
+// view->SetRange(-1000,-1000,-1000,1000,1000,1000);
+// view->ShowAxis();
+
+ if (!arr) return;
+
+ Int_t ntk=arr->GetEntries();
+ for (Int_t jtk=0; jtk<ntk; jtk++)
+ {
+  TObject* obj=arr->At(jtk);
+  if (!obj) continue;
+  if (!(obj->InheritsFrom("AliTrack"))) continue;
+  AliTrack* tx=(AliTrack*)obj;
+  Display(tx,range,iaxis,scale);
+ }
+}
+///////////////////////////////////////////////////////////////////////////
 AliPosition* AliHelix::Extrapolate(AliTrack* t,Double_t* pars,Double_t scale)
 {
 // Extrapolate an AliTrack according to the corresponding helix curve
diff --git a/RALICE/AliHelix.h b/RALICE/AliHelix.h
index d1165500b20..69ea0c1012f 100644
--- a/RALICE/AliHelix.h
+++ b/RALICE/AliHelix.h
@@ -25,6 +25,7 @@ class AliHelix : public THelix
   Float_t GetTofmax() const;   // Provide the maximum time of flight
   void Display(AliTrack* t,Double_t* range=0,Int_t iaxis=3,Double_t scale=-1);// Show curve for this track
   void Display(AliEvent* e,Double_t* range=0,Int_t iaxis=3,Double_t scale=-1);// Show curves for this event
+  void Display(TObjArray* a,Double_t* range=0,Int_t iaxis=3,Double_t scale=-1);// Show curves for this track array
   void Refresh(Int_t mode=0);  // Refresh the view before drawing the next one
   AliPosition* Extrapolate(AliTrack* t,Double_t* pars=0,Double_t scale=-1); // Extrapolate this track
   void MakeCurve(AliTrack* t,Double_t* range=0,Int_t iaxis=3,Double_t scale=-1); // Helix curve for this track
@@ -42,6 +43,6 @@ class AliHelix : public THelix
   TObjArray* fCurves;  //! Temp. storage for the curves on the drawing
   AliPosition* fExt;   //! The extrapolation result
  
- ClassDef(AliHelix,2) // Representation and extrapolation of AliTracks in a magnetic field.
+ ClassDef(AliHelix,3) // Representation and extrapolation of AliTracks in a magnetic field.
 };
 #endif
diff --git a/RALICE/history.txt b/RALICE/history.txt
index 80282c5820c..0ba2c955ec1 100644
--- a/RALICE/history.txt
+++ b/RALICE/history.txt
@@ -682,3 +682,5 @@
                 This allows observation of moving direction in event displays.
                 Also support for ignoring track endpoints introduced in AliHelix to 
                 allow correct display for very long tracks together with observed hits.
+18-mar-2006 NvE Support for display of selected track array introduced in AliHelix.
+                Also copy ctor of AliHelix made complete for new datamembers.
-- 
2.43.0