ROOT_528-00b_version: io/io/src/TKeyMapFile.cxx Source File

00001 // @(#)root/io:$Id: TKeyMapFile.cxx 34913 2010-08-20 19:18:35Z pcanal $
00002 // Author: Rene Brun   23/07/97
00003 
00004 /*************************************************************************
00005  * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
00006  * All rights reserved.                                                  *
00007  *                                                                       *
00008  * For the licensing terms see $ROOTSYS/LICENSE.                         *
00009  * For the list of contributors see $ROOTSYS/README/CREDITS.             *
00010  *************************************************************************/
00011 
00012 //////////////////////////////////////////////////////////////////////////
00013 //                                                                      //
00014 // Utility class for browsing TMapFile objects.                         //
00015 // When the browser is invoked for a TMapFile, a TKeyMapFile object     //
00016 // is created for each object in the mapped file.                       //
00017 // When a TKeyMapFile object is clicked in the browser, a new copy      //
00018 // of this object is copied into the local directory and the action     //
00019 // corresponding to object->Browse is executed (typically Draw).        //
00020 //                                                                      //
00021 //////////////////////////////////////////////////////////////////////////
00022 
00023 #include "TKeyMapFile.h"
00024 #include "TDirectory.h"
00025 #include "TMapFile.h"
00026 #include "TBrowser.h"
00027 
00028 ClassImp(TKeyMapFile)
00029 
00030 //______________________________________________________________________________
00031 TKeyMapFile::TKeyMapFile() : TNamed(), fMapFile(0)
00032 {
00033    // Default constructor.
00034 }
00035 
00036 //______________________________________________________________________________
00037 TKeyMapFile::TKeyMapFile(const char *name, const char *classname, TMapFile *mapfile)
00038       : TNamed(name,classname)
00039 {
00040    // Constructor.
00041    fMapFile = mapfile;
00042 }
00043 
00044 //______________________________________________________________________________
00045 void TKeyMapFile::Browse(TBrowser *b)
00046 {
00047    // Browse the contained objects
00048    TObject *obj = gDirectory->Get((char*)GetName());
00049    delete obj;
00050    obj = fMapFile->Get(GetName(),0);
00051    
00052    if( b && obj )
00053       obj->Browse( b );
00054 }