class ReadOnlyInput(forms.widgets.Input):

  """Read only input widget.

  """

  input_type = 'text'

  def render(self, name, value, attrs=None):

    """Render ReadOnlyInput widget as HTML.

    """

    attrs['readonly'] = 'readonly'

    return super(ReadOnlyInput, self).render(name, value, attrs)

class TinyMCE(forms.widgets.Textarea):

  """TinyMCE widget. 

  Requires to include tiny_mce_src.js in your template. Widget can be

  customized by overwriting or adding extra options to mce_settings

  dictionary

  You can set TinyMCE widget for particular form field using code below:

    class ExampleForm(forms_helpers.DbModelForm):

      content = forms.fields.CharField(widget=custom_widgets.TinyMCE())

  You can include tiny_mce_src.js in your template using:

    {% block scripts %}

  	  <script type="text/javascript" src="/tiny_mce/tiny_mce_src.js"></script>

    {% endblock %}

  """ 

  DEF_MCE_SETTINGS = { 'mode': "exact",

                       'theme': "simple",

                       'theme_advanced_toolbar_location': "top",

                       'theme_advanced_toolbar_align': "center"}

  mce_settings = DEF_MCE_SETTINGS.copy()

  TINY_MCE_HTML_FMT = u'''\

tinyMCE.init(%(settings_json)s)

  def render(self, name, value, attrs=None):

    """Render TinyMCE widget as HTML.

    """

    if value is None:

      value = ''

    value = smart_unicode(value)

    final_attrs = self.build_attrs(attrs, name=name)

    self.mce_settings['elements'] = "id_%s" % name

    # convert mce_settings from dict to JSON

    mce_json = simplejson.JSONEncoder().encode(self.mce_settings)

    return mark_safe(self.TINY_MCE_HTML_FMT % 

        {'attrs': flatatt(final_attrs),

         'value': escape(value), 

         'settings_json':  mce_json})