CbmQaCanvas.cxx

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/* Copyright (C) 2020 GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Sergey Gorbunov [committer] */
 
 
#include "CbmQaCanvas.h"
 
#include "TBuffer.h"
#include "TVirtualPad.h"
 
ClassImp(CbmQaCanvas);
 
void CbmQaCanvas::Streamer(TBuffer& R__b)
{
 
  // Save global gPad pointer,
  // because it will be modified by TCanvas streamer
  auto store = gPad;
  if (R__b.IsReading()) {
    R__b.ReadClassBuffer(CbmQaCanvas::Class(), this);
  }
  else {
    R__b.WriteClassBuffer(CbmQaCanvas::Class(), this);
  }
  // restore the global pointer
  gPad = store;
}
 
void CbmQaCanvas::Divide2D(int nPads)
{
  if (nPads < 1) nPads = 1;
  int rows = (int) sqrt(nPads);
  int cols = nPads / rows;
  if (cols * rows < nPads) cols++;
  TCanvas::Divide(cols, rows);
}