#!/usr/bin/env python
# coding: utf8
from gluon.html import *
from gluon.utils import *

class AJAXSELECT(SELECT):
    def __init__(self, source, query,  **attributes):
        SELECT.__init__( self, **attributes)
        self.source = source
        self.query = query

    def elements(self, *args, **kargs):
        matches = DIV.elements(self,  *args,  **kargs)
        if args and 'script' in args:
            matches.insert(0,  self.hookScript() )
        return matches

    def hookScript(self):
        scriptText  = 'YAHOO.util.Event.onContentReady("' + self.attributes['_id'] + '", function() { \n'
        scriptText += '\tthis.ajax_selection = new YAHOO.Ext.AjaxSelect(this, {source : "' + self.source + '"});\n'
        scriptText += '\tthis.ajax_selection.update("' + ( self.query  or '' ) + '");\n'
        scriptText += '}); \n'
        return SCRIPT( scriptText, _language='javascript'  )

    def xml(self):
        return self.hookScript().xml() + '\n' + SELECT.xml(self)

    def _postprocessing(self):
        if '_id' not in self.attributes:
            self.attributes['_id'] = 'ajax_select_' + web2py_uuid()