Exemple #1
0
//_____________________________________________________________________________
Int_t ProofSimple::GetHistosFromFC(TCanvas *cv)
{
   // Check for the histograms in the files of a possible TFileCollection

   TIter nxo(fOutput);
   TFileCollection *fc = 0;
   Bool_t fc_found = kFALSE, hs_found = kFALSE;
   while ((fc = (TFileCollection *) nxo())) {
      if (strcmp(fc->ClassName(), "TFileCollection")) continue;
      fc_found = kTRUE;
      if (!fHist) {
         fHist = new TH1F*[fNhist];
         for (Int_t i = 0; i < fNhist; i++) { fHist[i] = 0; }
      } else {
         for (Int_t i = 0; i < fNhist; i++) { SafeDelete(fHist[i]); }
      }
      // Go through the list of files
      TIter nxf(fc->GetList());
      TFileInfo *fi = 0;
      while ((fi = (TFileInfo *) nxf())) {
         TFile *f = TFile::Open(fi->GetCurrentUrl()->GetUrl());
         if (f) {
            for (Int_t i = 0; i < fNhist; i++) {
               TString hn = TString::Format("h%d", i);
               TH1F *h = (TH1F *) f->Get(hn);
               if (h) {
                  hs_found = kTRUE;
                  if (!fHist[i]) {
                     fHist[i] = (TH1F *) h->Clone();
                     fHist[i]->SetDirectory(0);
                  } else {
                     fHist[i]->Add(h);
                  }
               } else {
                  Error("GetHistosFromFC", "histo '%s' not found in file '%s'",
                        hn.Data(), fi->GetCurrentUrl()->GetUrl());
               }
            }
            f->Close();
         } else {
            Error("GetHistosFromFC", "file '%s' could not be open", fi->GetCurrentUrl()->GetUrl());
         }
      }
      if (hs_found) break;
   }
   if (!fc_found) return -1;
   if (!hs_found) return -1;
   
   for (Int_t i = 0; i < fNhist; i++) {
      cv->cd(i+1);
      if (fHist[i]) {
         fHist[i]->DrawCopy();
      }
   }
   Info("GetHistosFromFC", "histograms read from %d files in TFileCollection '%s'",
                           fc->GetList()->GetSize(), fc->GetName());
   // Done
   return 0;
}