AutoAdvance.cxx

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#include "EventDisplayBase/AutoAdvance.h"
#include <iostream>
#include <unistd.h>
#include "TTimer.h"
#include "IoModules/ReadWriteModule.h"
#include "EventDisplayBase/IoModule.h"
using namespace evdb;

AutoAdvance::AutoAdvance() : fTimer(0) { 
  fTimer = new TTimer;
  fTimer->SetObject(this);
  fTimer->Start(1000);
}

//......................................................................

AutoAdvance::~AutoAdvance() 
{
  fTimer->Stop();
  delete fTimer;
}

//......................................................................

Bool_t AutoAdvance::HandleTimer(TTimer *t) 
{
  t->Stop();
  
  // Advance to next event. When in auto-advance mode, quit at end of file
  FILE* fpp = fopen(".evd-pause-autoadvance","r");
  int istat = 1;
  if (fpp==0) istat = IoModule::Instance()->Advance();
  else        fclose(fpp);
  
  if (istat == 0) {
    // If we reach the end of the file, pause and look for a flag file
    // indicating that we should reopen the file and continue
    std::cerr << "EOF -- waiting for .evd-reopen-file flag..." << std::endl;
    FILE* fp = fopen(".evd-reopen-file","r");
    if (fp!=0) {
      fclose(fp);
      IoModule::Instance()->IoMod().Close();
      unlink(".evd-reopen-file");
      IoModule::Instance()->IoMod().RewindFile();
      IoModule::Instance()->Reload();
      std::cerr << "Reopenning file..." << std::endl;
    }
  }
  t->Start(1000);
  return true;
}

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