GtkRadioButton
   Button that is part of a group, only one of which may be selected.
  
Object Hierarchy
Direct subclasses
None.
Description
   
    A GtkRadioButton is one of a group of similar
    widgets, only one of which may be selected at any one time.
   
   
    In the version of GTK+ currently used by PHP-GTK there is an issue with
    the "activate" signal where it
    is used alongside toggle switches in arrays.  In this particular widget, 
    the "clicked" signal is the
    activating signal, and as a result of this feature repeats itself when
    another group member is activated.
   
   
    One way around this is to use the 
    "pressed" signal.  Another would
    be to set up a count for each individual function and test that the count
    is not divisible by 2.  Or, depending on the kind of function you are
    calling, you could simply allow 
    "clicked" to be fired twice.