PLease help me with this error

ROOT
1

Hello,

I am very new to Root :frowning:
and I have a macro file to debug
:angry:

my file’s code is


Int_t canvasnew(int RUN1=200,int RUN2=220,int NHITS=-1)
{
  Int_t NENTRIES = NHITS;    
  gROOT->Reset();    
  ////////// Canvas //////////
    char COM[4][50]; 
    if (RUN1!=RUN2){
        sprintf(&COM[0][0],"FRONT WALL top  - RUNS %d-%d",RUN1,RUN2);
        sprintf(&COM[1][0],"FRONT WALL bottom - RUNS %d-%d",RUN1,RUN2);
        sprintf(&COM[2][0],"REAR WALL top - RUNS %d-%d",RUN1,RUN2);
        sprintf(&COM[3][0],"REAR WALL bottom - RUNS %d-%d",RUN1,RUN2);      
    }
    else {
        sprintf(&COM[0][0],"FRONT WALL top  - RUNS %d",RUN1,RUN2);
        sprintf(&COM[1][0],"FRONT WALL bottom - RUNS %d",RUN1,RUN2);
        sprintf(&COM[2][0],"REAR WALL top - RUNS %d",RUN1,RUN2);
        sprintf(&COM[3][0],"REAR WALL bottom - RUNS %d",RUN1,RUN2);
    }
            TCanvas *c[4];
        TPad *p[4];
        const char *tit="ALADIN TOF Wall - Control Interface";
        char cname[50];
        char pname[50];
        const Int_t WindowWidth = 245;
        const Int_t WindowHeight = 330;
        const Int_t XWOffset=0;
        const Int_t YWOffset=30;
        Int_t XW,YW;
        for (Int_t Group=0;Group<4;Group++) {// coul
        sprintf(cname,"c%d",Group+1);
        sprintf(pname,"p%d",Group+1);
        if (Group<4){
            XW=Group*(WindowWidth+8)+XWOffset;
            YW=0;
        }
        else{
            XW=(Group-4)*(WindowWidth+8)+XWOffset;
            YW=WindowHeight+YWOffset;
        }
        c[Group] = new
TCanvas(cname,&COM[Group][0],XW,YW,WindowWidth,WindowHeight);
        c[Group]->ToggleEventStatus();
        c[Group]->cd();
        TPaveLabel *title = new TPaveLabel(0.1,0.96,0.9,0.99,&COM[Group][0]);
        title->Draw();
        TDatime now;
        TPaveLabel *date = new TPaveLabel(0.7,0.01,0.9,0.03,now.AsString());
        date->Draw();
        }
        for (Int_t Group=0;Group<4;Group++) {
        c[Group]->cd(); 
        gStyle->SetOptLogy(0); // Don't put that command before drawing title and
date paves!
        p[Group] = new TPad(pname,"Graphs",0.01,0.05,0.99,0.95);
        p[Group]->Draw();
        gStyle->SetOptStat(0);    
        p[Group]->cd();
        p[Group]->Divide(8,12,0.,0.,10);
        c[Group]->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)",0,
                0, "ProcEvent(Int_t,Int_t,Int_t,TObject*)"); // blow-up
        }
      }

But I keep getting this error
:question: :cry:

Error in TQObject::CheckConnectArgs: slot ProcEvent(int,int,int,TObject*)
does not exist
Error in TQObject::CheckConnectArgs: slot ProcEvent(int,int,int,TObject*)
does not exist
Error in TQObject::CheckConnectArgs: slot ProcEvent(int,int,int,TObject*)
does not exist
Error in TQObject::CheckConnectArgs: slot ProcEvent(int,int,int,TObject*)
does not exist

How can I solve this error?
Pleeeeeeease :unamused:
Thank you very very much!!

2

Hi,

You have to implement a ProcEvent(Int_t,Int_t,Int_t,TObject*) function, for example:

void ProcEvent(Int_t event, Int_t px, Int_t py, TObject *selected) { printf("TCanvas::ProcessedEvent : event:%3d - px:%5d py:%5d selected: %s\n", event, px, py, (selected && selected->GetName()) ? selected->GetName() : ""); }
or remove (comment) this statement: c[Group]->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)",0, 0, "ProcEvent(Int_t,Int_t,Int_t,TObject*)"); // blow-up
Cheers, Bertrand.

3

Thank you so so so much for your help
:smiley:

4

No problem! :slight_smile: