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Reference Guide
TVirtualGraphPainter.cxx
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1// @(#)root/hist:$Id$
2// Author: Olivier Couet 20/05/08
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include "TROOT.h"
14#include "TPluginManager.h"
15#include "TClass.h"
16
18
20
21/** \class TVirtualGraphPainter
22 \ingroup Hist
23 Abstract interface to a histogram painter
24*/
25
26////////////////////////////////////////////////////////////////////////////////
27/// Static function returning a pointer to the current graph painter.
28/// If the graph painter does not exist a default painter (singleton) is created.
29
31{
32 // if no painter set yet, create a default painter via the PluginManager
33 if (!fgPainter) {
35 if ((h = gROOT->GetPluginManager()->FindHandler("TVirtualGraphPainter"))) {
36 if (h->LoadPlugin() == -1) return 0;
37 fgPainter = (TVirtualGraphPainter*)gROOT->GetClass("TGraphPainter")->New();
38 }
39 }
40
41 // Create an instance of the graph painter
42 return fgPainter;
43}
44
45////////////////////////////////////////////////////////////////////////////////
46/// Static function to set an alternative histogram painter.
47
49{
50 fgPainter = painter;
51}
#define h(i)
Definition: RSha256.hxx:106
#define ClassImp(name)
Definition: Rtypes.h:363
#define gROOT
Definition: TROOT.h:410
Abstract interface to a histogram painter.
static TVirtualGraphPainter * fgPainter
static void SetPainter(TVirtualGraphPainter *painter)
Static function to set an alternative histogram painter.
static TVirtualGraphPainter * GetPainter()
Static function returning a pointer to the current graph painter.