/*
	Compile with:
	g++ -Wall -Wno-long-long -pedantic -ansi -I$(root-config --incdir --libs) -o NotifyTest NotifyTest.C
*/

#ifndef __CINT__
#include <iostream>
#include <TObject.h>
#include <TChain.h>
#endif // __CINT__

class TChatter: public TObject {
		public:
	unsigned int count;
	
	TChatter(): TObject(), count(0) {}
	virtual Bool_t Notify()
		{ std::cout << "Changed! (#" << (++count) << ")" << std::endl; return true; }
	
	#ifdef __CINT__
		ClassDef(TChatter, 0)
	#endif // __CINT__
}; // TChatter

#ifdef __CINT__
	ClassImp(TChatter)
#endif // __CINT__

Long64_t NotifyTest(const char* treename, const char* treespec) {
	
	TChatter chatter;
	TChain chain(treename);
	chain.SetNotify(&chatter);
	chain.Add(treespec);
	Long64_t iEntry = 0, nEntries = chain.GetEntries();
	while (iEntry < nEntries) chain.GetEntry(iEntry++);
	return iEntry;
} // NotifyTest()

#ifndef __CINT__

int main(int argc, char** argv) {
	if (argc != 3) return 1;
	Long64_t nEntries = NotifyTest(argv[1], argv[2]);
	std::cout << nEntries << " entries parsed." << std::endl;
	return 0;
} // main()

#endif // __CINT__