/**
  *    Sets the widget into the form, grouping radio
  *    buttons if any.
  *    @param SimpleWidget $tag   Incoming form control.
  *    @access private
  */
 protected function setWidget($tag)
 {
     if (strtolower($tag->getAttribute('type')) == 'radio') {
         $this->addRadioButton($tag);
     } elseif (strtolower($tag->getAttribute('type')) == 'checkbox') {
         $this->addCheckbox($tag);
     } else {
         $this->widgets[] =& $tag;
     }
 }

 /**
  *    Comparison. Compares id attribute of widget.
  *    @param SimpleWidget $widget    Control to compare.
  *    @access public
  */
 function isMatch($widget)
 {
     return $widget->isId($this->_id);
 }

 /**
  *    Sets the widget into the form, grouping radio
  *    buttons if any.
  *    @param SimpleWidget $tag   Incoming form control.
  *    @access private
  */
 function _setWidget($tag) {
     if (strtolower($tag->getAttribute('type')) == 'radio') {
         $this->_addRadioButton($tag);
     } elseif (strtolower($tag->getAttribute('type')) == 'checkbox') {
         $this->_addCheckbox($tag);
     } else {
         $this->_widgets[$tag->getName()] = &$tag;
     }
 }

 /**
  *    Sets the widget into the form, grouping radio
  *    buttons if any.
  *    @param SimpleWidget $tag   Incoming form control.
  *    @access private
  */
 function _setWidget($tag)
 {
     if (strtolower($tag->getAttribute("type")) == "radio") {
         $this->_addRadioButton($tag);
     } elseif (strtolower($tag->getAttribute("type")) == "checkbox") {
         $this->_addCheckbox($tag);
     } else {
         $this->_widgets[$tag->getName()] =& $tag;
     }
 }

 /**
  *    The only allowed value in the one in the
  *    "value" attribute. The default for this
  *    attribute is "on". If this widget is set to
  *    true, then the usual value will be taken.
  *    @param string $value      New value.
  *    @return boolean           True if allowed.
  *    @access public
  */
 function setValue($value)
 {
     if ($value === false) {
         return parent::setValue($value);
     }
     if ($value === true) {
         return parent::setValue($this->getAttribute('value'));
     }
     if ($value != $this->getAttribute('value')) {
         return false;
     }
     return parent::setValue($value);
 }