// Author: Roel Aaij 21/07/2007

/*************************************************************************
 * Copyright (C) 1995-2007, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#include "TGCanvas.h"
#include "TGFrame.h"
#include "TClass.h"
#include "TGWindow.h"
#include "TGResourcePool.h"
#include "Riostream.h"
#include "TSystem.h"
#include "TImage.h"
#include "TEnv.h"
#include "TGToolTip.h"
#include "TGWidget.h"
#include "TGPicture.h"
#include "TRandom3.h"
#include "TVirtualTableInterface.h"
#include "TGTable.h"
#include "TGTableCell.h"
#include "TGTableHeader.h"
#include "TObjArray.h"
#include "TGTableContainer.h"
#include "TGScrollBar.h"
#include "TGButton.h"
#include "TGNumberEntry.h"
#include "TGTextEntry.h"
#include "TGLabel.h"
#include "TColor.h"

ClassImp(TGTable)
ClassImp(TTableRange)

//______________________________________________________________________________
/* Begin_Html
<center><h2>TGTable</h2></center>
<br><br>                                                                    
TGTable implements a table widget to display data in rows and       
columns. The data is supplied by a TVirtualTableInterface.          
<br><br>
The table is a TGCanvas to make use of already available viewport   
functionality and drawing optimizations.                            
<br><br>
The top left cell in a table has coordinates (0,0)                  
<br><br>
A TObjArray is used internally to ensure little overhead and fast   
acces to cells.                                                     
<br><br>
If the data source has more rows than the default 50 rows of cells in
memory, buttons at the bottom of the table can be used to load the
next or previous chunk of data.
<br><br>
At the top of the table, a frame is visible that shows the coordinates
of the top left cell currently in memmory in row,column. The amount of
rows and columns is also shown in rows x columns. These values can be
edited to move to a different area of the data source or to resize the
table. Tab will switch between the enties, return will move to the
currently entered range and resize the table if needed. Clicking the
goto button has the same effect.
<br><br>
A TGTable is created by first creating an appropriate               
TVirtualTableInterface from the data that needs visualization and   
then creating the TGTable using this interface.                     
<br><br>
A simple macro to use a TGTable with a TGSimpleTableInterface:
End_Html
Begin_Macro(source, gui)
{
   // Create an array to hold a bunch of numbers
   Int_t i = 0, j = 0;
   UInt_t nrows = 6, ncolumns = 5;
   Double_t** data = new Double_t*[nrows];
   for (i = 0; i < nrows; i++) {
      data[i] = new Double_t[ncolumns];
      for (j = 0; j < ncolumns; j++) {
         data[i][j] = 10 * i + j;
      }
   }

   // Create a main frame to contain the table
   TGMainFrame* mainframe = new TGMainFrame(0, 400, 200);
   mainframe->SetCleanup(kDeepCleanup) ;

   // Create an interface
   TGSimpleTableInterface *iface = new TGSimpleTableInterface(data, 6, 5); 

   // Create the table
   TGTable *table = new TGTable(mainframe, 999, iface); 

   // Add the table to the main frame
   mainframe->AddFrame(table, new TGLayoutHints(kLHintsExpandX | kLHintsExpandY));

   //Update data
   data[5][1] = 3.01; 
   //update the table view
   table->Update(); 

   // Layout and map the main frame
   mainframe->SetWindowName("Tree Table Test") ;
   mainframe->MapSubwindows() ;
   mainframe->Layout();
   mainframe->Resize() ;
   mainframe->MapWindow() ;

   return mainframe;
}