"""
File: widgets/__init__.py
HTML4 Widget overrides
"""
from django.newforms.widgets import Input
from django.utils.safestring import mark_safe
from django.newforms.util import flatatt
from django.utils.encoding import StrAndUnicode, force_unicode

class HTML4Input(Input):
    input_type = None # Subclasses must define this.

    def render(self, name, value, attrs=None):
        if value is None: value = ''
        final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
        if value != '':
            # Only add the 'value' attribute if a value is non-empty.
            final_attrs['value'] = force_unicode(value)
        return mark_safe(u'<input%s>' % flatatt(final_attrs))

class HTML4TextInput(HTML4Input):
    input_type = 'text'

class HTML4PasswordInput(HTML4Input):
    input_type = 'password'

class HTML4HiddenInput(HTML4Input):
    input_type = 'hidden'
    is_hidden = True

class HTML4FileInput(HTML4Input):
    input_type = 'file'
    needs_multipart_form = True

class HTML4DateTimeInput(HTML4Input):
    input_type = 'text'
    format = '%Y-%m-%d %H:%M:%S'     # '2006-10-25 14:30:59'


"""
File: myapp/forms.py
Forms based on HTML4 widgets
"""
from django import newforms as forms
from myproject import widgets

class ThreadForm(forms.Form):
    subject = forms.CharField(
        max_length=150, 
        widget=widgets.HTML4TextInput(attrs={'size': 60}),
        help_text="Something descriptive, maximum of 150 characters.")
    message = forms.CharField(
        widget=forms.Textarea(attrs={'cols': 60, 'rows': 10}), 
        help_text="Use of Markdown syntax is available, no HTML tags allowed.")