SetHistLineWidth question?

From: lijowski@cosray2.wustl.edu
Date: Tue Feb 15 2000 - 19:51:02 MET


  Hello Rooters,

  Is gStyle -> SetHistLineWidth() supposed to change a histogram line 
  width in the Postscript output?  The following macro reads histograms
  from the hsimple.root file and the Postscript output is the same whether
  I use gStyle -> SetHistLineWidth(1) or gStyle -> SetHistLineWidth(10).
  I have been using root 2.23/12 under SunOS5.7.

  Thank you and best regards,

  Michal Lijowski

  void test_hist()

{
   gROOT -> Reset();
   gROOT -> SetStyle("Plain");
   gStyle -> SetHistLineWidth(1);
// open input file
   Char_t  infile[100];
   sprintf(infile, "/data1/cern/root/tutorials/hsimple.root");
   TFile *f1 = (TFile*)gROOT->GetListOfFiles()->FindObject(infile);
   if (!f1) {
      f1 = new TFile(infile);
   }

   cout << " hist line width  " << gStyle -> GetHistLineWidth() << endl;

   TH1F *HH[10];
   TCanvas *CVS[10];
   gDirectory -> ls();
   gDirectory -> pwd();
   Char_t ctitle[40], cname[40];
   Char_t  infile[200], outps[30];
   // create an iterator to loop through all objects(keys) in the directory
    Int_t  ii = 0;
    TIter nextkey(gDirectory -> GetListOfKeys());
    TObject *obj;
    TKey *key;
    while (key = (TKey*)nextkey()) {
       key -> Print();
       obj = key -> ReadObj();  //use ReadObj, not Read
       
       if (obj->InheritsFrom("TH1") ) {  //instead of obj->IsA
           HH[ii] = (TH1F *) obj;
           cout << "   " << HH[ii] -> GetTitle() << endl;
           sprintf(cname, "myCVS%02d", ii);
           sprintf(ctitle, "Canvas  %02d", ii);
           CVS[ii] = new TCanvas(cname, ctitle, 800, 600);
           gPad -> SetTicks(); 
           HH[ii] -> DrawCopy();
           CVS[ii] -> Update();
           sprintf(outps, "%s.ps", cname);
           CVS[ii] -> SaveAs(outps);
           ii++;
       }
    }
}



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