/* ======================================================================== *\
!
! *
! * This file is part of MARS, the MAGIC Analysis and Reconstruction
! * Software. It is distributed to you in the hope that it can be a useful
! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
! * It is distributed WITHOUT ANY WARRANTY.
! *
! * Permission to use, copy, modify and distribute this software and its
! * documentation for any purpose is hereby granted without fee,
! * provided that the above copyright notice appear in all copies and
! * that both that copyright notice and this permission notice appear
! * in supporting documentation. It is provided "as is" without express
! * or implied warranty.
! *
!
!
!   Author(s): Thomas Bretz  07/2001 <mailto:tbretz@uni-sw.gwdg.de>
!
!   Copyright: MAGIC Software Development, 2000-2001
!
!
\* ======================================================================== */

//////////////////////////////////////////////////////////////////////////////
//                                                                          //
//  MH                                                                      //
//                                                                          //
//  This is a base tasks for mars histograms. It defines a common interface //
//  for filling the histograms with data (MH::Fill) which is used by a      //
//  common 'filler' (s. MFillH)                                             //
//                                                                          //
//  If you want to create your own histogram class the new class must be    //
//  derived from MH (instead of the base MParContainer) and you must        //
//  the fill function of MH. This is the function which is called to fill   //
//  the histogram(s) by the data of a corresponding parameter container.    //
//                                                                          //
//////////////////////////////////////////////////////////////////////////////

#include "MH.h"

#include <TCanvas.h>

ClassImp(MH);

// --------------------------------------------------------------------------
//
// Default Constructor. It sets name and title only. Typically you won't
// need to change this.
//
MH::MH(const char *name, const char *title)
{
    //
    //   set the name and title of this object
    //
    fName  = name  ? name  : "MH" ;
    fTitle = title ? title : "Base class for Mars histograms" ;
}

// --------------------------------------------------------------------------
//
// This is a function which should replace the creation of default
// canvases like root does. Because this is inconvinient in some aspects.
// need to change this.
// You can specify a name for the default canvas and a title. Also
// width and height can be given.
// MakeDefCanvas looks for a canvas with the given name. If now name is
// given the DefCanvasName of root is used. If no such canvas is existing
// it is created and returned. If such a canvas already exists a new canvas
// with a name plus anumber is created (the number is calculated by the
// number of all existing canvases plus one)
//
TCanvas *MH::MakeDefCanvas(const char *name, const char *title,
                           const UInt_t w, const UInt_t h)
{
    const TList *list = (TList*)gROOT->GetListOfCanvases();

    const char *def = name ? name : gROOT->GetDefCanvasName();

    TCanvas *c;
    if (list->FindObject(def))
    {
        const char *n = StrDup(Form("%s <%d>", def, list->GetSize()+1));
        c = new TCanvas(n, title, w, h);
        delete [] n;
    }
    else
        c = new TCanvas(def, title, w, h);

    return c;
}

// --------------------------------------------------------------------------
//
// This function works like MakeDefCanvas(name, title, w, h) but name
// and title are retrieved from the given TObject.
//
TCanvas *MH::MakeDefCanvas(const TObject *obj,
                           const UInt_t w, const UInt_t h)
{
    return MakeDefCanvas(obj->GetName(), obj->GetTitle(), w, h);
}