#include "TImage.h"
#include "TCanvas.h"
#include "TArrayD.h"
#include "TROOT.h"
#include "TColor.h"
#include "TAttImage.h"

TCanvas *c1;

void rose_image_mod()
{
   // Display image in a new canvas and pad.
   
   Double_t x[5] = {.3,.5,.5,.3,0.3};
   Double_t y[5] = {.6,.6,.8,.8,0.6};
   TPolyLine *pline = new TPolyLine(5,x,y);
   pline->SetFillStyle(4000);
   pline->SetLineColor(2);
   pline->SetLineWidth(2);
   pline->SetUniqueID(5);


   TImage *img = TImage::Open("rose512.jpg");

   if (!img) {
      printf("Could not create an image... exit\n");
      return;
   }
   
   c1 = new TCanvas("rose512", "examples of image manipulations", 700, 700);
    img->Draw();
    //pline->Draw("f");
    pline->Draw();
   //img->SetEditable(kFALSE);
   
   c1->AddExec("ex","ROIClicked()");
  
}



void ROIClicked() {
   //this action function is called whenever you move the mouse
   //it just prints the id of the picked ROI
   //you can add graphics actions instead
   int event = gPad->GetEvent();
   if (event != 11) return; //may be comment this line 
   TObject *select = gPad->GetSelected();
   if (!select) return;
   if (select->InheritsFrom("TPolyLine")) {
      TPolyLine *pl = (TPolyLine*)select;
      printf("You have clicked ROI %d, color=%d\n",
              pl->GetUniqueID(),pl->GetFillColor());
   }
}