[gtkmm] More help needed...!

[David Kinyanjui <david i2software com>]

Hello;
First of, thanks for everyones' help and response on my previous question.
Now, I've got another issue...
I have created a dialog or rather a window  whereby, I'm trying to use 
it to preview a picture whenever one is selected on the fileselection 
dialog.
In that case, I need a way to be able to check and connect a signal 
whereby, the preview only pop up whenever a selection is made  i.e when 
a file is highlighted (NOTE: right now the preview dialog is popping up 
only when I click OK button on fileselection instead). I
tried to use:  signal_selection_notify_event()
snippet=>
bool selection_event(GdkEventSelection* event) {
   if(event->selection)
   {
       //pop the  preview window
  }
   return false;
}

get_selection_entry()->signal_selection_notify_event().
               connect (SigC::slot (*this, 
&winPictureFileSelection::selection_event), false);