class TSpyCanvas : public TCanvas 
{

      RQ_OBJECT("TSpyCanvas")
   private:
      vector<Color_t> fColorList;
      int fLastColor;
      TList *fCutList;
      bool fIsIntegralEnabled;
      TLegend *fLegend;
      TCutG *fCut;

      int npoint;
   public:
      TSpyCanvas(const char *name, Int_t ww, Int_t wh, Int_t winid);
      ~TSpyCanvas();
      
      void RemoveIntegrals();
      void DefineCountArea(Int_t event,Int_t px,Int_t py,TObject* obj); // *SLOT*
      void DoIntegral(); //*MENU*


      ClassDef(TSpyCanvas, 0);
};



TSpyCanvas(const char *name, Int_t ww, Int_t wh, Int_t winid) : TCanvas(name,ww,wh,winid)
{
   fLastColor=0;
   fColorList.push_back(kRed);
   fColorList.push_back(kGreen);
   fColorList.push_back(kBlue);
   fColorList.push_back(kBlack);
   fColorList.push_back(kBlack);
   fColorList.push_back(kMagenta);
   fColorList.push_back(kOrange);
   fColorList.push_back(kCyan);

   fLegend = new TLegend(0.12,0.73,0.55,0.88);
   fLegend->SetBorderSize(0);

   fIsIntegralEnabled = false;
   fCutList = new TList();
   fCutList->SetOwner(true);
}

void RemoveIntegrals()
{
   fCutList->Delete();
   this->Modified();
   this->Update();
   fLegend->GetListOfPrimitives()->Delete();
}

~TSpyCanvas()
{
   delete fCutList;
}

void DoIntegral()
{
   cout << "do integral" << endl;
   this->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)","TSpyCanvas",this, "DefineCountArea(Int_t,Int_t,Int_t,TObject*)");
}



void DefineCountArea(Int_t event,Int_t px,Int_t py,TObject* obj)
{
   if(!obj->InheritsFrom(TH2::Class()))
   {
      cout << "is not th2" << endl;
      //this->SetEditable(kTRUE);
      return;
   }  
   this->SetEditable(kFALSE);
   cout << event << endl;
   if(event == 1)
   {
      fCut = new TCutG(); 
      fCut->SetLineColor(fColorList[fLastColor]);
      if(++fLastColor >= fColorList.size()) fLastColor=0;
      fCut->SetLineWidth(2);  
      fCutList->Add(fCut);
      npoint =0;
   }
   if(event == 21 || event == 1)
   {
      cout << "ev 21 | 1" << endl;

      // Float_t upx = this->AbsPixeltoX(px);
      Float_t x = this->PadtoX(this->AbsPixeltoX(px));
      // Float_t upy = gPad->AbsPixeltoY(py);
      Float_t y = this->PadtoY(this->AbsPixeltoY(py));
      fCut->AddPoint(x,y);
      this->SetEditable(kTRUE);
      fCut->Paint();
      this->SetEditable(kFALSE);

   }
   if(event == 11)
   {
      if(fCut)
      {
         fCut->AddPoint(fCut->GetPointX(0),fCut->GetPointY(0));
         this->SetEditable(kTRUE);
         fCut->Paint();
         this->SetEditable(kFALSE);

         TList* primitives = this->GetListOfPrimitives();
         TIter next(primitives);
         while(TObject *obj = next())
         {
            if(obj->InheritsFrom(TH2::Class()))
            { 
               fCut->IntegralHist((TH2*)obj);
               fLegend->AddEntry(fCut,Form("%i cts"),"l");
               break;
            }
         }
         fCut = nullptr;
         this->Disconnect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", (void*)this, "DefineIntArea(Int_t,Int_t,Int_t,TObject*)");
      }
   }
   this->Modified();
   this->Update();
}