Constellation plot in c++ using qtgui

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

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

On Tue, May 6, 2014 at 10:29 AM, Mostafa A.
[email protected]wrote:

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

  // some blocks here ....

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

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

best

You haven’t don’t anything to get the qApplication and start it.

Tom

On Tue, May 6, 2014 at 11:00 AM, Tom R. [email protected] wrote:

int main()
return 0;

You haven’t don’t anything to get the qApplication and start it.

Tom

You haven’t “done” anything to get the qApplication and start it.

Tom

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