//*-- Author :    Damir Buskulic   22/04/03

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VFrameChannelViewer                                                  //
//                                                                      //
// Viewer based on Data Display. Allows users to view frame and vector  //
// data from an interactive session in Vega.                            //
// If fc is a frame channel already defined, the command                //
//                                                                      //
// vega[] fc->StartViewer()                                             //
//                                                                      //
// will launch it.                                                      //
// Uses code from Data Display, developped by D. Verkindt for Virgo.    //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#include "VFrameChannelViewer.h"
#include "TROOT.h"
#include "VDyPlot.h"
#include "TH2.h"
extern "C" {
#include "dataDisplay.h"
}

ClassImp(VFrameChannelViewer)

//______________________________________________________________________________
VFrameChannelViewer::VFrameChannelViewer()
{
//*-*-*-*-*-*-*-*-*-*Default FrameChannel player constructor*-*-*-*-*-*-*-*
//*-*                =======================================
   mFrameChannel         = 0;
}

//______________________________________________________________________________
VFrameChannelViewer::VFrameChannelViewer(VVirtualFrameChannel *fc)
{
//*-*-*-*-*-*-*-*-*-*Default FrameChannel player constructor*-*-*-*-*-*-*-*
//*-*                =======================================
   mFrameChannel         = fc;
   if (gROOT->IsBatch()) {
      Warning("VFrameChannelViewer","Cannot launch viewer in batch mode");
   } else if (Dy == 0) {
      DyMain((void*)mFrameChannel);
   } else {
      Warning("VFrameChannelViewer","Only one viewer possible at a time");
   }
}

//______________________________________________________________________________
 double VFrameChannelViewer::GetCurrentTime()
{
   return DyGetStartTime();
}

//______________________________________________________________________________
 TObject* VFrameChannelViewer::GetPlot(int numpad, int numsubpad)
{
// Return a pointer to a plot drawn by the viewer
// numpad and numsubpad are the pad and subpad number
// of the plot inside the viewer canvas
   
   TObject* obj=0;
   TPad* savepad = (TPad*)gPad;
   gDDCanvas->cd(numpad);
   if (numsubpad && gPad) gPad->cd(numsubpad);
   
// Loop on all objects contained in the pad
   TIter    next(gPad->GetListOfPrimitives());
   while ((obj = next())) {
//   If 1Dim plot or 2Dim histo
      if (obj->InheritsFrom(VDyPlot::Class()) ||
          obj->InheritsFrom(TH2F::Class())) {
         break;
      }
   }
   
   savepad->cd();
   
   return obj;
}

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