// @(#)root/star:$Name:  $:$Id: TColumnView.cxx,v 1.2 2003/01/27 20:41:36 brun Exp $
// Author: Valery Fine(fine@bnl.gov)   13/03/2000

/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
//////////////////////////////////////////////////////////////////////////
//                                                                      //
//  TColumnView                                                         //
//                                                                      //
//  It is a helper class to present TTable object view TBrowser         //
//                                                                      //
//////////////////////////////////////////////////////////////////////////
 
#include "TColumnView.h"
#include "TVirtualPad.h"

ClassImp(TColumnView)

//______________________________________________________________________________
 TColumnView::TColumnView(const char *colName,TTable *table):TChair(table){
   SetName(colName);
}
//______________________________________________________________________________
 TColumnView::~TColumnView()
{ }
//______________________________________________________________________________
 void TColumnView::Browse(TBrowser *)
{
   // Create a column histogram for the simple column
   if (!IsFolder()) 
   {
      Draw(GetName(),"");
      gPad->Modified();
      gPad->Update();
   }
}
//______________________________________________________________________________
 TH1 *TColumnView::Histogram(const char *selection)
{
   // Create a histogram from the context menu
   TH1 *h = Draw(GetName(),selection);
   gPad->Modified();
   gPad->Update();
   return h;
}

//______________________________________________________________________________
 Bool_t  TColumnView::IsFolder() const 
{ 
   // Treat the column with the pointer to the "Ptr" as a "folder"
   Bool_t isFolder = kFALSE;
   const TTable *thisTable = Table();
   if (thisTable) {
      Int_t cIndx = thisTable->GetColumnIndex(GetName());
      if ((thisTable->GetColumnType(cIndx)) == TTable::kPtr ) isFolder = kTRUE;
   }
   return isFolder;
}