'Help was requested for the selected widget.'

def __onHelpAction(self):

    nodes = self.selectedNodes()
    help_url = None
    if (len(nodes) == 1):
        node = nodes[0]
        desc = node.description
        help_url = ('help://search?' + urlencode({'id': desc.qualified_name}))
        self.__showHelpFor(help_url)
