#include <TROOT.h>
#include <TGButton.h>
#include <TGFrame.h>
#include <TTimer.h>
#include <TThread.h>
#include <Riostream.h>

class MyMainFrame : public TGMainFrame {

private:
   TTimer *timer;
   TThread *thread;

public:
   MyMainFrame(const TGWindow *p,UInt_t w,UInt_t h);
   virtual ~MyMainFrame();
   void DoDraw();
   void EnableTimer();
   void DisableTimer();
   static void *PrintStuff(void *arg);
   
   ClassDef(MyMainFrame, 0) // My Main Frame
};

MyMainFrame::MyMainFrame(const TGWindow *p,UInt_t w,UInt_t h) : 
   TGMainFrame(p,w,h), timer(0), thread(0)
{
   TGTextButton *start = new TGTextButton(this,"&Start ");
   start->Connect("Clicked()","MyMainFrame",this,"EnableTimer()");

   TGTextButton *stop = new TGTextButton(this,"&Stop ");
   stop->Connect("Clicked()","MyMainFrame",this,"DisableTimer()");

   AddFrame(start, new TGLayoutHints(kLHintsCenterY,5,5,3,4));
   AddFrame(stop, new TGLayoutHints(kLHintsCenterY,5,5,3,4));

   thread = new TThread("thread", PrintStuff, (void*) 0);

   MapSubwindows();
   Layout();
   MapWindow();
}

void MyMainFrame::DoDraw() 
{
   thread->Run();
}

void MyMainFrame::EnableTimer()
{
   if (!timer) {
      timer = new TTimer(this, 1000, kTRUE); //synchronous or asynch?
      timer->Connect("Timeout()", "MyMainFrame", this, "DoDraw()");
      timer->Reset();
      timer->TurnOn();
    }
   else
      timer->TurnOn();
}

void MyMainFrame::DisableTimer()
{
   if (timer)
      timer->TurnOff(); 
   if (thread && (thread->GetState() == TThread::kRunningState)) {
      thread->Kill();
   }
}

void *MyMainFrame::PrintStuff(void *arg)
{
   cout << "Did it work?" << endl;
   return 0;
}

MyMainFrame::~MyMainFrame() {
   Cleanup();
   if (thread)
      delete thread;
   if (timer) {
      timer->TurnOff(); 
      delete timer;
   }
}

void sample() 
{
   // Popup the GUI...
   new MyMainFrame(gClient->GetRoot(),600,400);
}