[Discuss-gnuradio] constellation plot in c++ using qtgui

[Mostafa Alizadeh]

hello everybody, 

I wanted to use constellation plot of gnuradio in my top block in c++. I actually use qtcreator in ubuntu and gnuradio 3.7.3. After I found out that I must add "-lgnuradio-qtgui" to the .pro file of qtcreator for using qtgui of gnuradio, I ran the program but it didn't open any GUI!!! 

my code is like this : 

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 
#include <gnuradio/qtgui/const_sink_c.h>

#include <QtGui/QApplication>
#include <qapplication.h>
#include <QWidget>

using namespace gr; 

int main() 
{ 
      // some blocks here .... 

     qtgui::const_sink_c::sptr constellation = qtgui::const_sink_c::make(10, "constellation", 1, NULL); 
            
      // some connections .... 

      tb->run(); 

      return 0; 
} 

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 

What is the problem!? Why I can't see any GUI? 


best