/** \class ExRootProgressBar
 *
 *  Class showing progress bar
 *
 *  $Date: 2009-02-07 15:44:02 $
 *  $Revision: 1.3 $
 *
 *
 *  \author P. Demin - UCL, Louvain-la-Neuve
 *
 */

#include "ExRootProgressBar.h"
#include "TSystem.h"
#include <cstdio>
#include <iostream>

using namespace std;

ExRootProgressBar::ExRootProgressBar(Long64_t entries, Int_t width) :
  fEntries(entries), fWidth(width), fTime(0), fHashes(0), fBar(0)
{
  fBar = new char[width + 1];
  memset(fBar, '-', width);
  fBar[width] = 0;

}

//------------------------------------------------------------------------------

ExRootProgressBar::~ExRootProgressBar()
{
   if(fBar) delete[] fBar;
}

//------------------------------------------------------------------------------

void ExRootProgressBar::Update(Long64_t entry)
{
  ULong_t time = gSystem->Now();

  if(time < fTime + 500 && entry < fEntries - 1) return;

  fTime = time;

  Int_t hashes = Int_t((entry + 1.0)/fEntries*fWidth);

  if(hashes > fHashes)
  {
    memset(fBar + fHashes, '$', hashes - fHashes);
    fHashes = hashes;
  }
 float frac=(entry + 1.0)/fEntries*100.0;
 if(frac<10)   fprintf(stdout, "**         [%s] %.2f%% processed             **\r", fBar,(entry + 1.0)/fEntries*100.0);
 if(frac==100) fprintf(stdout, "**         [%s] %.2f%% processed           **\r", fBar,(entry + 1.0)/fEntries*100.0);
 else          fprintf(stdout, "**         [%s] %.2f%% processed            **\r", fBar,(entry + 1.0)/fEntries*100.0);
  fflush(stdout);

  if(entry+1==fEntries)
    {
       char temp[500];
       sprintf(temp, "**         [%s] %.2f%% processed ", fBar,(entry + 1.0)/fEntries*100.0);
       string mystringName(temp);
       cout << mystringName <<endl;
    }
}

//------------------------------------------------------------------------------

void ExRootProgressBar::Finish()
{
  fprintf(stderr, "\n");
  fflush(stderr);
}

//------------------------------------------------------------------------------