mirror of
https://github.com/django/django.git
synced 2025-10-31 01:25:32 +00:00
newforms: Implemented RadioSelect, with unit tests
git-svn-id: http://code.djangoproject.com/svn/django/trunk@4072 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty
@@ -5,7 +5,7 @@ HTML Widget classes
|
||||
__all__ = (
|
||||
'Widget', 'TextInput', 'PasswordInput', 'HiddenInput', 'FileInput',
|
||||
'Textarea', 'CheckboxInput',
|
||||
'Select', 'SelectMultiple',
|
||||
'Select', 'SelectMultiple', 'RadioSelect',
|
||||
)
|
||||
|
||||
from django.utils.html import escape
|
||||
@@ -35,7 +35,10 @@ class Widget(object):
|
||||
return attrs
|
||||
|
||||
class Input(Widget):
|
||||
"Base class for all <input> widgets (except type='checkbox', which is special)"
|
||||
"""
|
||||
Base class for all <input> widgets (except type='checkbox' and
|
||||
type='radio', which are special).
|
||||
"""
|
||||
input_type = None # Subclasses must define this.
|
||||
def render(self, name, value, attrs=None):
|
||||
if value is None: value = ''
|
||||
@@ -102,8 +105,45 @@ class SelectMultiple(Widget):
|
||||
output.append(u'</select>')
|
||||
return u'\n'.join(output)
|
||||
|
||||
class RadioSelect(Widget):
|
||||
pass
|
||||
class RadioInput(object):
|
||||
"An object used by RadioFieldRenderer that represents a single <input type='radio'>."
|
||||
def __init__(self, name, value, attrs, choice):
|
||||
self.name, self.value = name, value
|
||||
self.attrs = attrs or {}
|
||||
self.choice_value, self.choice_label = choice
|
||||
|
||||
def __str__(self):
|
||||
return u'<label>%s %s</label>' % (self.tag(), self.choice_label)
|
||||
|
||||
def is_checked(self):
|
||||
return self.value == str(self.choice_value)
|
||||
|
||||
def tag(self):
|
||||
final_attrs = dict(self.attrs, type='radio', name=self.name, value=self.choice_value)
|
||||
if self.is_checked():
|
||||
final_attrs['checked'] = 'checked'
|
||||
return u'<input%s />' % flatatt(final_attrs)
|
||||
|
||||
class RadioFieldRenderer(object):
|
||||
"An object used by RadioSelect to enable customization of radio widgets."
|
||||
def __init__(self, name, value, attrs, choices):
|
||||
self.name, self.value, self.attrs = name, value, attrs
|
||||
self.choices = choices
|
||||
|
||||
def __iter__(self):
|
||||
for choice in self.choices:
|
||||
yield RadioInput(self.name, self.value, self.attrs, choice)
|
||||
|
||||
def __str__(self):
|
||||
"Outputs a <ul> for this set of radio fields."
|
||||
return u'<ul>\n%s\n</ul>' % u'\n'.join([u'<li>%s</li>' % w for w in self])
|
||||
|
||||
class RadioSelect(Select):
|
||||
def render(self, name, value, attrs=None, choices=()):
|
||||
"Returns a RadioFieldRenderer instance rather than a Unicode string."
|
||||
if value is None: value = ''
|
||||
str_value = str(value) # Normalize to string.
|
||||
return RadioFieldRenderer(name, str_value, attrs, list(chain(self.choices, choices)))
|
||||
|
||||
class CheckboxSelectMultiple(Widget):
|
||||
pass
|
||||
|
||||
@@ -340,6 +340,117 @@ If 'choices' is passed to both the constructor and render(), then they'll both b
|
||||
<option value="5">5</option>
|
||||
</select>
|
||||
|
||||
# RadioSelect Widget ##########################################################
|
||||
|
||||
>>> w = RadioSelect()
|
||||
>>> print w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
|
||||
<ul>
|
||||
<li><label><input checked="checked" type="radio" name="beatle" value="J" /> John</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
|
||||
</ul>
|
||||
|
||||
If the value is None, none of the options are checked:
|
||||
>>> print w.render('beatle', None, choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
|
||||
<ul>
|
||||
<li><label><input type="radio" name="beatle" value="J" /> John</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
|
||||
</ul>
|
||||
|
||||
If the value corresponds to a label (but not to an option value), none of the options are checked:
|
||||
>>> print w.render('beatle', 'John', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
|
||||
<ul>
|
||||
<li><label><input type="radio" name="beatle" value="J" /> John</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="G" /> George</label></li>
|
||||
<li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
|
||||
</ul>
|
||||
|
||||
The value is compared to its str():
|
||||
>>> print w.render('num', 2, choices=[('1', '1'), ('2', '2'), ('3', '3')])
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
</ul>
|
||||
>>> print w.render('num', '2', choices=[(1, 1), (2, 2), (3, 3)])
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
</ul>
|
||||
>>> print w.render('num', 2, choices=[(1, 1), (2, 2), (3, 3)])
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
</ul>
|
||||
|
||||
The 'choices' argument can be any iterable:
|
||||
>>> def get_choices():
|
||||
... for i in range(5):
|
||||
... yield (i, i)
|
||||
>>> print w.render('num', 2, choices=get_choices())
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="0" /> 0</label></li>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
<li><label><input type="radio" name="num" value="4" /> 4</label></li>
|
||||
</ul>
|
||||
|
||||
You can also pass 'choices' to the constructor:
|
||||
>>> w = RadioSelect(choices=[(1, 1), (2, 2), (3, 3)])
|
||||
>>> print w.render('num', 2)
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
</ul>
|
||||
|
||||
If 'choices' is passed to both the constructor and render(), then they'll both be in the output:
|
||||
>>> print w.render('num', 2, choices=[(4, 4), (5, 5)])
|
||||
<ul>
|
||||
<li><label><input type="radio" name="num" value="1" /> 1</label></li>
|
||||
<li><label><input checked="checked" type="radio" name="num" value="2" /> 2</label></li>
|
||||
<li><label><input type="radio" name="num" value="3" /> 3</label></li>
|
||||
<li><label><input type="radio" name="num" value="4" /> 4</label></li>
|
||||
<li><label><input type="radio" name="num" value="5" /> 5</label></li>
|
||||
</ul>
|
||||
|
||||
The render() method returns a RadioFieldRenderer object, whose str() is a <ul>.
|
||||
You can manipulate that object directly to customize the way the RadioSelect
|
||||
is rendered.
|
||||
>>> w = RadioSelect()
|
||||
>>> r = w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
|
||||
>>> for inp in r:
|
||||
... print inp
|
||||
<label><input checked="checked" type="radio" name="beatle" value="J" /> John</label>
|
||||
<label><input type="radio" name="beatle" value="P" /> Paul</label>
|
||||
<label><input type="radio" name="beatle" value="G" /> George</label>
|
||||
<label><input type="radio" name="beatle" value="R" /> Ringo</label>
|
||||
>>> for inp in r:
|
||||
... print '%s<br />' % inp
|
||||
<label><input checked="checked" type="radio" name="beatle" value="J" /> John</label><br />
|
||||
<label><input type="radio" name="beatle" value="P" /> Paul</label><br />
|
||||
<label><input type="radio" name="beatle" value="G" /> George</label><br />
|
||||
<label><input type="radio" name="beatle" value="R" /> Ringo</label><br />
|
||||
>>> for inp in r:
|
||||
... print '<p>%s %s</p>' % (inp.tag(), inp.choice_label)
|
||||
<p><input checked="checked" type="radio" name="beatle" value="J" /> John</p>
|
||||
<p><input type="radio" name="beatle" value="P" /> Paul</p>
|
||||
<p><input type="radio" name="beatle" value="G" /> George</p>
|
||||
<p><input type="radio" name="beatle" value="R" /> Ringo</p>
|
||||
>>> for inp in r:
|
||||
... print '%s %s %s %s %s' % (inp.name, inp.value, inp.choice_value, inp.choice_label, inp.is_checked())
|
||||
beatle J J John True
|
||||
beatle J P Paul False
|
||||
beatle J G George False
|
||||
beatle J R Ringo False
|
||||
|
||||
# CharField ###################################################################
|
||||
|
||||
>>> f = CharField(required=False)
|
||||
|
||||
Reference in New Issue
Block a user