problems with gtk_toggle_button_set_active() and check buttons

[Ignacio Nodal]

Hi again,
I've create a check button but I've also added a callback which must be
called if the right button has been pressed. The calldata is a pointer
to my class. 
When I create it I set the state to TRUE or FALSE according to the value
stored in *parameter.

[...]
_boolean_button = gtk_check_button_new();
_label_widget = gtk_label_new (_label);
gtk_container_add(GTK_CONTAINER(_boolean_button), _label_widget);
gtk_misc_set_alignment(GTK_MISC(_label_widget), 0.1f, 0.5f);
gtk_widget_show(_label_widget);
//"button_press_event" instead of "toggled" to know which button was
pressed
gtk_signal_connect (GTK_OBJECT(_boolean_button), "button_press_event",
                    GTK_SIGNAL_FUNC(CB_ChangedValue), (gpointer) this);
//set state as indicated in "*parameter"
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(_boolean_button),
(*parameter));
[...]

In my callback I look which button has been pressed so I can use
differents callbacks for the left and the right button. I know the
button only toggles using the left button, that's ok for me.
The problem is when I ask in my CB_ChangedValue for "button->active" it
returns me FALSE when it's "pressed-in" and TRUE when it's "raised-out".
If I don't use gtk_toggle_button_set_active() in the code above all
works fine..

Here is the callback function (just testing)...

void CB_ChangedValue(GtkWidget* widget, GdkEventButton* event, gpointer
cd)
{
  ParameterBoolean * pb = (ParameterBoolean *) cd;

  switch (event->button) {
  case 1: 
    *(pb->parameter) = !(*(pb->parameter));
    if(pb->_type == BooleanCharCase || pb->_type == BooleanPixmap)
      pb->Update();
    if(pb->_callback != NULL) {
      void (*pf) (gpointer) = (void (*) (gpointer)) pb->_callback;
      pf(pb->_calldata);
    }
    if (GTK_TOGGLE_BUTTON(widget)->active) {
      g_print("button activated w:%d
p:%d\n",GTK_TOGGLE_BUTTON(widget)->active,*(pb->parameter));
    } else {
      g_print("button desactivated w:%d
p:%d\n",GTK_TOGGLE_BUTTON(widget)->active,*(pb->parameter));
    }
    break;
  case 3:
    if(pb->_btn3callback != NULL) {
      void (*pf) (gpointer) = (void (*) (gpointer)) pb->_btn3callback;
      pf(pb->_btn3data);
    }
    break;
  }

What's going wrong?

Thanks in advance,
        Ignacio Nodal

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