#include "TROOT.h"
#include "TH1F.h"
#include <math.h>
#include <iostream>
#include "TPad.h"
#include "TGraph.h"
#include "TCanvas.h"
#include "TFile.h"
#include <stdlib.h>
#include <stdio.h>
#include <string>
#include "THStack.h"
#include "Riostream.h"
#include "TMath.h"
#include "TF1.h"
#include <time.h>

using namespace std;

void code()
{
    gROOT->Reset();
    
    Int_t dimx_c=800; 
    Int_t dimy_c=800;
   
    TH2D* hist=new TH2D("hist","",200,-100,100,200,-100,100); 

    arbre->Project("hist"," : "); //there I would like to get informations of the X and Y Treeviewer functions.

    TCanvas *c = new TCanvas ("c","Projection",dimx_c,dimy_c);
    c->Update();
    TPad * pad_graph2D = new TPad("","pad_graph2D",0.25,0.25,1,1);
    hist->SetTitle("Titre: Graphique 2D");
    hist->GetXaxis()->SetTitle("Axe des X");
    hist->GetYaxis()->SetTitle("Axe des Y");
    pad_graph2D->Draw();
    pad_graph2D->cd();
    hist->Draw();


// --- X Projection ---

    
    c->cd();
    TPad * pad_projx = new TPad("Projection_X","pad_projection_X",1,0,0.25,0.3);
    TH1D * projx = hist->ProjectionX();
    projx->SetTitle("Projection selon x");
    projx->GetXaxis()->SetTitle("Axe des X");
    projx->GetYaxis()->CenterTitle();
    projx->GetYaxis()->SetTitle("Axe des Y");
    projx->SetLabelSize(0.06,"xy");
    pad_projx->Draw();
    pad_projx->cd();
    pad_projx->Update();
    projx->Draw();
    pad_projx->RedrawAxis();


// --- Y Projection ---

    
    TH1D *projy = hist->ProjectionY();
    projy->SetTitle("Projection selon y");
    projy->GetXaxis()->SetTitle("Axe des X");
    projy->GetYaxis()->CenterTitle();
    projy->GetYaxis()->SetTitle("Axe des Y");
    projy->SetLabelSize(0.06,"xy");

    c->cd();
    TPad *pad_projy = new TPad("Projection_Y","pad_projection_Y",0,1,0.3,0.25);
    pad_projy->Draw();

    TCanvas *c_temp=new TCanvas ("c_temp","canevas_temporaire",dimx_c,dimy_c);
    c_temp->cd();
    TPad * pad_projy_temp = new TPad("Pad_temporaire","pad_temporaire",1,0,0.25,0.3);
    pad_projy_temp->Draw();
    pad_projy_temp->cd();
    projy->Draw();
    pad_projy_temp->Update();

    TImage *img = TImage::Create();
    img->FromPad(pad_projy_temp);
    img->Flip(90);
    pad_projy->cd();
    img->Draw("x");
    pad_projy->Update();
    c_temp->Close();
}