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Reference Guide
TVirtualPadPainter.cxx
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1 // @(#)root/base:$Id$
2 // Author: Timur Pocheptsov 6/5/2009
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2012, 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 "TVirtualPadPainter.h"
13 #include "TPluginManager.h"
14 
16 
17 /** \class TVirtualPadPainter
18 \ingroup Base
19 
20 To make it possible to use GL for 2D graphic in a TPad/TCanvas.
21 TVirtualPadPainter interface must be used instead of TVirtualX.
22 Internally, non-GL implementation _should_ delegate all calls
23 to gVirtualX, GL implementation will delegate part of calls
24 to gVirtualX, and has to implement some of the calls from the scratch.
25 */
26 
27 ////////////////////////////////////////////////////////////////////////////////
28 ///Virtual dtor.
29 
31 {
32 }
33 
34 ////////////////////////////////////////////////////////////////////////////////
35 ///Empty definition.
36 
38 {
39 }
40 
41 ////////////////////////////////////////////////////////////////////////////////
42 ///Empty definition.
43 
45 {
46 }
47 
48 ////////////////////////////////////////////////////////////////////////////////
49 ///Empty definition.
50 
52 {
53 }
54 
55 ////////////////////////////////////////////////////////////////////////////////
56 /// Create a pad painter of specified type.
57 
59 {
60  TVirtualPadPainter *painter = 0;
61  TPluginHandler *h = gPluginMgr->FindHandler("TVirtualPadPainter", type);
62 
63  if (h && h->LoadPlugin() != -1)
64  painter = (TVirtualPadPainter *) h->ExecPlugin(0);
65 
66  return painter;
67 }
const char Option_t
Definition: RtypesCore.h:62
TH1 * h
Definition: legend2.C:5
static TVirtualPadPainter * PadPainter(Option_t *opt="")
Create a pad painter of specified type.
TPluginHandler * FindHandler(const char *base, const char *uri=0)
Returns the handler if there exists a handler for the specified URI.
Int_t LoadPlugin()
Load the plugin library for this handler.
virtual void InitPainter()
Empty definition.
R__EXTERN TPluginManager * gPluginMgr
Long_t ExecPlugin(int nargs, const T &... params)
#define ClassImp(name)
Definition: Rtypes.h:279
int type
Definition: TGX11.cxx:120
virtual void LockPainter()
Empty definition.
virtual void InvalidateCS()
Empty definition.
To make it possible to use GL for 2D graphic in a TPad/TCanvas.