# -*- coding: iso-8859-1 -*-

#  This software and supporting documentation are distributed by
#      Institut Federatif de Recherche 49
#      CEA/NeuroSpin, Batiment 145,
#      91191 Gif-sur-Yvette cedex
#      France
#
# This software is governed by the CeCILL-B license under
# French law and abiding by the rules of distribution of free software.
# You can  use, modify and/or redistribute the software under the 
# terms of the CeCILL-B license as circulated by CEA, CNRS
# and INRIA at the following URL "http://www.cecill.info". 
# 
# As a counterpart to the access to the source code and  rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty  and the software's author,  the holder of the
# economic rights,  and the successive licensors  have only  limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading,  using,  modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean  that it is complicated to manipulate,  and  that  also
# therefore means  that it is reserved for developers  and  experienced
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# encouraged to load and test the software's suitability as regards their
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# same conditions as regards security.
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# The fact that you are presently reading this means that you have had
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'''
TgGUI implementation for L{Bytes<soma.signature.api.Bytes>}
data type.

@author: Nicolas Souedet
@organization: U{NeuroSpin<http://www.neurospin.org>} and U{IFR 49<http://www.ifr49.org>}
@license: U{CeCILL version 2<http://www.cecill.info/licences/Licence_CeCILL_V2-en.html>}
'''
__docformat__ = "epytext en"

import turbogears.widgets

from soma.translation import translate as _
from soma.tggui.api import TgGUI, TgTextField
from soma.tggui import tools

#-------------------------------------------------------------------------------
class Bytes_TgGUI( TgGUI ):
  def __init__( self, instance ):
    super(Bytes_TgGUI, self).__init__( instance )
    self._widget = None
  
  
  def editionWidget( self, value, window, parent=None, name=None, live=False ):
    TgGUI.editionWidget( self, value, window, parent, name, live )
    
    if self._widget is not None:
      raise RuntimeError( _( 'editionWidget() cannot be called twice without'\
                               'a call to closeEditionWidget()' ) )
    self._live = live
    self._name = name
    self._widget = TgTextField( label = self._name )

    if value is not None:
      self.updateEditionWidget( self._widget, value )
        
    if live:
      self._widget.onAttributeChange( 'default', self._userModification )

    return self._widget
  
  
  def closeEditionWidget( self, editionWidget ):
    pass
  
  def getPythonValue( self, editionWidget ):
    return eval( "'" + unicode( editionWidget.text() ) + "'" )

  def updateEditionWidget( self, editionWidget, value ):
    editionWidget.setText( repr( value + '"' )[ 1: -2 ] )

  def unserializeEditionWidgetValue( self, value, notifyObject = False ):
    if ( self._widget is not None ) :
      res = self.findValueFromParams( value, self._widget.widgetid, self._name, default = '' )
      self._widget.setText( unicode( res ) )
      
  def _userModification( self, ):
    self.onWidgetChange.notify( self._widget )