#include <iostream>
#include <TCanvas.h>
#include <TH1D.h>
#include <TRandom.h>

void testDraw(TCanvas* _obj)
{
  // draw canvas as is
  _obj->SaveAs("_test.pdf");

  // scale axis and draw
  gStyle->SetLabelOffset(0.005, "X");
  gStyle->SetLabelSize(0.06, "X"); //0.04
  
  // int nPads = ( (TList*) _obj->GetListOfPrimitives() )->GetSize();
  // for (int i = 0; i<nPads; i++)
  //   {
  //     _obj->cd(i);
  //     gPad->GetFrame()->UseCurrentStyle();
  //     //gPad->GetFrame()->Draw("goff");
  //     //gPad->Update();
  //     //gPad->RedrawAxis();
  //     gPad->Modified();
  //     gPad->Update();
  //   }
  _obj->UseCurrentStyle();
  _obj->Update();
  _obj->SaveAs("_test_scale.pdf");

}


void test()
{
  TRandom *rand = new TRandom(1234);

  TCanvas *c1 = new TCanvas("c1","c1",800,500);
  c1->Divide(2,1);

  //==============
  // 1st pad
  c1->cd(1);
  
  TH1D *h1 = new TH1D("h1", "h1", 10, 0., 2.);
  h1->SetLineColor(kBlack);
  h1->GetXaxis()->SetTitle("x-title");
  for (int i = 0; i<10; i++){ h1->SetBinContent( i, rand->Uniform(0.,10.) ); }

  double x[100], y[100]; int n(20);
  for (Int_t i=0;i<n;i++) {
    x[i] = i*0.1;
    y[i] = 10.*sin(x[i]+0.2);
  }
  TGraph* gr = new TGraph(n,x,y);
  gr->SetLineColor(kRed);

  h1->Draw("e1");
  gr->Draw("L3same");


  //==============
  // 2nd pad
  c1->cd(2);
  
  TH1D *h2 = new TH1D("h2", "h2", 10, 0., 2.);
  TH1D *h3 = new TH1D("h3", "h3", 10, 0., 2.);
  h2->SetLineColor(kBlack);
  h3->SetLineColor(kRed);
  for (int i = 0; i<10; i++)
    {
      h2->SetBinContent( i, rand->Uniform(0.,10.) );
      h3->SetBinContent( i, rand->Uniform(0.,10.) );
    }
  h2->Draw("e1");
  h3->Draw("e1same");

  c1->Update();
  
  //==============
  // test draw/save
  // call scale-draw/save
  testDraw(c1);
  
}