FairMQExHistoCanvasDrawerExample.cxx

Go to the documentation of this file.

/********************************************************************************
 *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
 *                                                                              *
 *              This software is distributed under the terms of the             *
 *              GNU Lesser General Public Licence (LGPL) version 3,             *
 *                  copied verbatim in the file "LICENSE"                       *
 ********************************************************************************/
#include "FairMQExHistoCanvasDrawerExample.h"

#include <TCanvas.h>
#include <TH1.h>
#include <THttpServer.h>
#include <TObjArray.h>
#include <TString.h>   // for TString
#include <cassert>

class TObject;

FairMQExHistoCanvasDrawerExample::FairMQExHistoCanvasDrawerExample()
    : fCanvas(nullptr)
{}

FairMQExHistoCanvasDrawerExample::~FairMQExHistoCanvasDrawerExample() {}

void FairMQExHistoCanvasDrawerExample::CreateCanvases(THttpServer& server)
{
    assert(!fCanvas);
    fCanvas = std::unique_ptr<TCanvas, std::function<void(TCanvas*)>>(new TCanvas("c1", "", 10, 10, 1000, 1000),
                                                                      [&](TCanvas* p) {
                                                                          server.Unregister(p);
                                                                          delete p;
                                                                      });
    fCanvas->Divide(2, 2);
    server.Register("Canvases", fCanvas.get());
}

void FairMQExHistoCanvasDrawerExample::DrawHistograms(TObjArray& arrayHisto)
{
    for (int i = 0; i < arrayHisto.GetEntriesFast(); i++) {
        TObject* obj = arrayHisto.At(i);
        TH1* histogram = static_cast<TH1*>(obj);

        if (TString(histogram->GetName()).EqualTo("histo1")) {
            fCanvas->cd(1);
            histogram->Draw();
            fCanvas->cd(0);
            fCanvas->Modified();
            fCanvas->Update();
        } else if (TString(histogram->GetName()).EqualTo("histo2")) {
            fCanvas->cd(2);
            histogram->Draw();
            fCanvas->cd(0);
            fCanvas->Modified();
            fCanvas->Update();
        } else if (TString(histogram->GetName()).EqualTo("histo3")) {
            fCanvas->cd(3);
            histogram->Draw("COL");
            fCanvas->cd(0);
            fCanvas->Modified();
            fCanvas->Update();
        } else if (TString(histogram->GetName()).EqualTo("histo4")) {
            fCanvas->cd(4);
            histogram->Draw("COL");
            fCanvas->cd(0);
            fCanvas->Modified();
            fCanvas->Update();
        }
    }
}