Hi,
I want to write an application with a graphical user interface and a socket
communication. My idea was to monitor the socket during a timer event while the
internal root loop is running.
Here my test program:
#include "TROOT.h"
#include "TCanvas.h"
#include "TSystem.h"
#include "TApplication.h"
#include "TSocket.h"
#include "TServerSocket.h"
#include "TMonitor.h"
#include "TTimer.h"
#include "TButton.h"
class MyTimer: public TTimer
{
public:
MyTimer() : TTimer(1000){};
virtual Bool_t Notify();
};
////////////////////////////////////////////
void InitButtonCanvas()
{
TCanvas * mainCanvas = new TCanvas("mainc", "Operation Status Monitoring",
-20,20, 600, 400);
mainCanvas->SetEditable(0);
TButton * QuitButton = new TButton("Quit", "myApp->Terminate(0)",
0.1, 0.1, 0.4, 0.2);
QuitButton->Draw();
mainCanvas->Update();
}
////////////////////////////////////////////
TMonitor * monitor;
Bool_t MyTimer::Notify()
{
TSocket *s;
s = monitor->Select(10);
if (s != (TSocket*)-1)
{
// do the work
}
Reset();
return TTimer::Notify();
}
////////////////////////////////////////////
void OpenCommunication()
{
TServerSocket * ss = new TServerSocket(1312, kTRUE);
TSocket * soc = ss->Accept();
ss->Close();
monitor = new TMonitor;
monitor->Add(soc);
}
////////////////////////////////////////////
TApplication * myApp;
extern void InitGui();
VoidFuncPtr_t initFuncs[] = {InitGui, 0};
TROOT root ("Reiner", "Reiners Application", initFuncs);
main(int argc, char ** argv)
{
myApp = new TApplication("Reiners plot test", &argc, argv, NULL, 0);
InitButtonCanvas();
OpenCommunication();
MyTimer mytimer;
gSystem->AddTimer(&mytimer);
myApp->Run();
}
As soon as a client program creates a TSocket this server program starts
the timer and runs the internal loop.
But the function monitor->Select(10) never returns. Instead the function
MyTimer::Notify() is called again and again immediately without waiting 1
second. There may be a problem with the Timer that is created inside of
monitor->Select(10)?
Or is there a better solution to run the internal root loop and to monitor a
socket communication?
Thanks for your help
Reiner.
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