%%cpp -d
#include "RooRealVar.h"
#include "RooDataSet.h"
#include "RooGaussModel.h"
#include "RooAddModel.h"
#include "RooTruthModel.h"
#include "RooDecay.h"
#include "RooPlot.h"
#include "TCanvas.h"
#include "TAxis.h"
#include "TH1.h"
using namespace RooFit;

RooRealVar dt("dt", "dt", -10, 10);
RooRealVar tau("tau", "tau", 1.548);

RooTruthModel tm1("tm", "truth model", dt);

RooDecay decay_tm("decay_tm", "decay", dt, tau, tm1, RooDecay::DoubleSided);

RooPlot *frame = dt.frame(Title("Bdecay (x) resolution"));
decay_tm.plotOn(frame, LineStyle(kDashed));

RooRealVar bias1("bias1", "bias1", 0);
RooRealVar sigma1("sigma1", "sigma1", 1);
RooGaussModel gm1("gm1", "gauss model 1", dt, bias1, sigma1);

RooDecay decay_gm1("decay_gm1", "decay", dt, tau, gm1, RooDecay::DoubleSided);

decay_gm1.plotOn(frame);

RooRealVar bias2("bias2", "bias2", 0);
RooRealVar sigma2("sigma2", "sigma2", 5);
RooGaussModel gm2("gm2", "gauss model 2", dt, bias2, sigma2);

RooRealVar gm1frac("gm1frac", "fraction of gm1", 0.5);
RooAddModel gmsum("gmsum", "sum of gm1 and gm2", RooArgList(gm1, gm2), gm1frac);

RooDecay decay_gmsum("decay_gmsum", "decay", dt, tau, gmsum, RooDecay::DoubleSided);

decay_gmsum.plotOn(frame, LineColor(kRed));

new TCanvas("rf209_anaconv", "rf209_anaconv", 600, 600);
gPad->SetLeftMargin(0.15);
frame->GetYaxis()->SetTitleOffset(1.6);
frame->Draw();

%jsroot on
gROOT->GetListOfCanvases()->Draw()