Question about gtk-- signals..

[jfp squinky org]

I've been working on my first big gtk-- program.  Looks like a great
toolkit!  I'm trying to create a nice little widget to manage groups of
radio buttons.  When I try to connect the button's toggle signal to
anything I get some very nasty errors.  I'm using gtk--0.8.0 and gtk-1.0.0
and gcc version 2.8.0.  If someone could help me figure how to create a
member function that can be connected to the toggle signal or send me some
source code showing how they were able to connect radio buttons to
things in g++ that would be great! thanks in advance.

Here are the errors I get:

g++ -g -I/usr/include -L/usr/lib -o radiobuttonbox.o RadioButtonBox.cc
-lgtkmm -lgtk -lgdk -lglib -L/usr/X11R6/lib -lXext -lX11 -lm  -lnsl -I.
RadioButtonBox.cc: In method `RadioButtonBox::RadioButtonBox(char *,
struct ButtonBoxSpec *, int)':
RadioButtonBox.cc:28: warning: initialization of non-const reference
`class RadioButtonBox *&' from rvalue `RadioButtonBox *'
/usr/local/include/gtk--sig.h:1256: warning: in passing argument 2 of
`connect<void, Gtk_ToggleButton, RadioButtonBox *, int
(RadioButtonBox::*)(Gtk_ToggleButton
*)>(Signal_proxy0<void,Gtk_ToggleButton> &, RadioButtonBox *&, int
(RadioButtonBox::*)(Gtk_ToggleButton *))'
/usr/local/include/gtk--sig.h: In method `void
Concretegtkslot0cb<void,RadioButtonBox *&,int
(RadioButtonBox::*)(Gtk_ToggleButton *)>::call()':
/usr/local/include/gtk--sig.h:912: `Concretegtkslot0cb<void,RadioButtonBox
*&,int (RadioButtonBox::*)(Gtk_ToggleButton *)>::func' cannot be used as a
function
make: *** [radiobuttonbox.o] Error 1

Here's the header file and source file... The Line in question has big
"What is wrong with this line" comments around it..

#include <gtk--.h>

typedef long RadioVal;

typedef struct ButtonBoxSpec
{
  RadioVal val;
  char *string;
}ButtonBoxSpec;

#define OPTIMALBBOXSIZE(x) ((int)(sqrt(x)+.05))

class RadioButtonBox: public Gtk_Table
{
  GSList *  buttonList;
  ButtonBoxSpec * buttonSpec;
 public:
  int xsize,ysize;
  Gtk_Label * tableHeader;
  RadioButtonBox (char * eNameOfBox, ButtonBoxSpec *eButtonBoxSpec,int
eElements);
  DoButtonBoxChange( Gtk_ToggleButton* toggle );
  Signal1<long> sigBoxChanged;
};

                                    
#include <RadioButtonBox.h>
#include <iostream.h>

RadioButtonBox::RadioButtonBox(char * eNameOfBox, ButtonBoxSpec *
eButtonBoxSpec, int eElements) :
 Gtk_Table ( OPTIMALBBOXSIZE(eElements),
OPTIMALBBOXSIZE(eElements)+1,false)
{
  //Add Title
  Gtk_RadioButton * radiob;
  int i;
  buttonSpec=eButtonBoxSpec;
  xsize=OPTIMALBBOXSIZE(eElements);
  ysize=OPTIMALBBOXSIZE(eElements)+1;

  tableHeader=new Gtk_Label(eNameOfBox);
  attach_defaults(tableHeader,0,xsize,0,1);

  for (i=0; i < eElements ; ++i)
    {
          if (!i)
            {
              radiob = new Gtk_RadioButton( NULL, eButtonBoxSpec[i].string
);
              buttonList = radiob->group();
            }
          else {radiob = new Gtk_RadioButton(buttonList,
eButtonBoxSpec[i].string );}
          radiob->show();

          /********What is wrong with this line???*************/
          connect(radiob->toggled,this, &RadioButtonBox::DoButtonBoxChange
);



          attach_defaults(radiob,i/xsize,i/xsize+1 , i%xsize+1,i%xsize+2);
          cout << "left " << (i/xsize) << " right " << (i/xsize+1) <<  "
top " << i%xsize+1 << " bottom "
               << (i%xsize+2) << "\n";

    }
  show();
}

RadioButtonBox::DoButtonBoxChange( Gtk_ToggleButton* toggle )
{
  if (toggle->get_state())
    {
      sigBoxChanged( buttonSpec[1].val);
    }
}                                                                                     



-----------------------------------------------------------------------
 Justin Sher         |  "No appeal to any historical or empirical    
 Programmer/Analyst  |   consideration can discover any fault in the
 NDST Communications |   proposition that men aim purposefully at  
 justin@ndst.com     |	 certain chosen ends." -L. Von Mises