CbmQaCanvas.h

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#ifndef CbmQaCanvas_H
#define CbmQaCanvas_H
 
#include "TCanvas.h"
#include "TROOT.h"
 
class CbmQaCanvas : public TCanvas {
public:
  CbmQaCanvas() : TCanvas() {}
 
  template<typename... Types>
  CbmQaCanvas(Types... args) : CbmQaCanvas(SetBatchModeOn(), args...) {}
 
  virtual ~CbmQaCanvas() {}
 
  void Divide2D(int nPads);
 
private:
  enum MyBoolean : Bool_t;
 
  template<typename... Types>
  CbmQaCanvas(MyBoolean oldBatchMode, Types... args) : TCanvas(args...) {
    // prevent automatic deletion of this canvas
    // when another canvas with the same name is created somewhere else
    gROOT->GetListOfCanvases()->Remove(this);
    // reset the batch mode to its original value
    gROOT->SetBatch((Bool_t) oldBatchMode);
  }
 
  static MyBoolean SetBatchModeOn() {
    MyBoolean oldBatchMode = (MyBoolean) gROOT->IsBatch();
    gROOT->SetBatch(kTRUE);
    return oldBatchMode;
  }
 
  ClassDef(CbmQaCanvas, 1);
};
 
#endif