#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
Libervia: a Salut à Toi frontend
Copyright (C) 2011  Jérôme Poisson (goffi@goffi.org)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""

from pyjamas.ui.VerticalPanel import VerticalPanel
from pyjamas.ui.HorizontalPanel import HorizontalPanel
from pyjamas.ui.DialogBox import DialogBox
from pyjamas.ui.ListBox import ListBox
from pyjamas.ui.Button import Button

class ContactsChooser(DialogBox):

    def __init__(self, host, callback, nb_contact=None, text='Please select contacts'):
        """
        ContactsChooser allow to select one or several connected contacts
        @param host: SatWebFrontend instance
        @param callback: method to call when contacts have been choosed
        @param nb_contact: number of contacts that have to be selected, None for no limit
        """
        self.host = host
        self.callback = callback
        self.nb_contact = nb_contact
        DialogBox.__init__(self, centered=True)

        content = VerticalPanel()
        content.setWidth('100%')
        self.contacts_list = ListBox()
        self.contacts_list.setVisibleItemCount(10)
        self.contacts_list.setMultipleSelect(True)
        self.contacts_list.setWidth("100%")
        self.contacts_list.setStyleName('contactsChooser')
        self.contacts_list.addChangeListener(self.onChange)
        content.add(self.contacts_list)
        button_panel = HorizontalPanel()
        self.choose_button = Button("Choose", self.onChoose)
        self.choose_button.setEnabled(False)
        button_panel.add(self.choose_button)
        button_panel.add(Button("Cancel", self.onCancel))
        content.add(button_panel)
        self.setHTML(text)
        self.setWidget(content)	
    
    def onChange(self):
        if self.nb_contact:
            if len(self.contacts_list.getSelectedValues()) == self.nb_contact:
                self.choose_button.setEnabled(True)
            else:
                self.choose_button.setEnabled(False)

    def getContacts(self):
        """
        Actually ask to choose the contacts
        """
        self.contacts_list.clear()
        for contact in self.host.contact_panel.getConnected():
            self.contacts_list.addItem(contact)
        self.show()

    def onChoose(self):
        self.hide()
        self.callback(self.contacts_list.getSelectedValues())

    def onCancel(self):
        self.hide()