ntupleTableTest.C: This TableTest class is a simple example of how to use a TGTable
// This TableTest class is a simple example of how to use a TGTable
// with a TTreeTableInterface. TableTest inherits from TGMainFrame to
// create a top level frame to embed the TGTable in. First, the
// hsimple.root file is opened to obtain an ntuple. Then a
// TTreeTableInterface is created using this ntuple. A table is then
// created using the interface. In the end, the table is added to the
// TGMainFrame that is the TableTest and the necessary calls to
// correctly draw the window are made. For more information about the
// use of TTreeTableInterface and TGTable, see their documentation.
// author: Roel Aaij 13/07/2007
#include <iostream>
#include <TApplication.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGFrame.h>
#include <TGWindow.h>
#include <TString.h>
#include <TGTable.h>
#include <TTreeTableInterface.h>
#include <TFile.h>
#include <TNtuple.h>
#include <TSelectorDraw.h>
// A little class to automatically handle the generation of unique
// widget ids.
class IDList {
private:
Int_t nID ; // Generates unique widget IDs.
public:
IDList() : nID(0) {}
~IDList() {}
Int_t GetUnID(void) { return ++nID ; }
} ;
class TableTest : public TGMainFrame {
private:
IDList fIDs ; // Generator for unique widget IDs.
UInt_t fNTableRows;
UInt_t fNTableColumns;
TGTable *fTable;
TFile *fFile;
TTreeTableInterface *fInterface;
public:
TableTest(const TGWindow *p, UInt_t ntrows, UInt_t ntcols,
UInt_t w = 100, UInt_t h = 100) ;
virtual ~TableTest() ;
void DoExit() ;
TGTable *GetTable() { return fTable; }
TTreeTableInterface *GetInterface() { return fInterface; }
ClassDef(TableTest, 0)
};
TableTest::TableTest(const TGWindow *p, UInt_t ntrows, UInt_t ntcols,
UInt_t w, UInt_t h)
: TGMainFrame(p, w, h), fNTableRows(ntrows), fNTableColumns(ntcols),
fTable(0)
{
SetCleanup(kDeepCleanup) ;
Connect("CloseWindow()", "TableTest", this, "DoExit()") ;
DontCallClose() ;
// Open root file for the tree
fFile = new TFile("$ROOTSYS/tutorials/hsimple.root");
if (!fFile || fFile->IsZombie()) {
printf("Please run <ROOT location>/tutorials/hsimple.C first.");
return;
}
// Get the ntuple from the file.
TNtuple *ntuple = (TNtuple *)fFile->Get("ntuple");
// Setup the expressions for the columns and the selection of the
// interface.
TString varexp = "px:py:pz:random:sin(px):log(px/py):log(pz)";
TString select = "";
TString options = "";
// Create the interface.
fInterface = new TTreeTableInterface(ntuple, varexp.Data(), select.Data(),
options.Data());
// Create the table and add it to the TableTest that is a TGMainFrame.
fTable = new TGTable(this, fIDs.GetUnID(), fInterface, fNTableRows,
fNTableColumns);
AddFrame(fTable, new TGLayoutHints(kLHintsExpandX | kLHintsExpandY));
// Calls to layout and draw the TableTest that is a TGMainFrame.
SetWindowName("Tree Table Test") ;
MapSubwindows() ;
Layout();
Resize(GetDefaultWidth()+20, 600) ;
MapWindow() ;
} ;
TableTest::~TableTest()
{
// Destructor
delete fInterface;
fFile->Close();
Cleanup() ;
}
void TableTest::DoExit()
{
// Exit this application via the Exit button or Window Manager.
// Use one of the both lines according to your needs.
// Please note to re-run this macro in the same ROOT session,
// you have to compile it to get signals/slots 'on place'.
DeleteWindow(); // to stay in the ROOT session
// gApplication->Terminate(); // to exit and close the ROOT session
}
TGTable *ntupleTableTest(UInt_t ntrows = 50, UInt_t ntcols = 10) {
TableTest *test = new TableTest(0, ntrows, ntcols, 500, 200);
return test->GetTable();
}