Datetime widget

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# -*- coding: utf-8 -*-
# widgets.py
#
# To use you have to put calendar/ (from http://www.dynarch.com/projects/calendar/)
# to your MEDIA folder and then include such links on your page:
# <!-- calendar -->
# <link rel="stylesheet" type="text/css" href="{{ MEDIA_URL }}calendar/calendar-win2k-cold-2.css" />
#<script type="text/javascript" src="{{ MEDIA_URL }}calendar/calendar.js"></script>
# <!-- this is translation file - choose your language here -->
#<script type="text/javascript" src="{{ MEDIA_URL }}calendar/lang/calendar-pl.js"></script>
#<script type="text/javascript" src="{{ MEDIA_URL }}calendar/calendar-setup.js"></script>
#<!-- /calendar -->

from django.utils.encoding import force_unicode
from django.conf import settings
from django import forms
import datetime, time
from django.utils.safestring import mark_safe

# DATETIMEWIDGET
calbtn = u"""<img src="%simages/calbutton.gif" alt="calendar" id="%s_btn" style="cursor: pointer; border: 1px solid #8888aa;" title="Select date and time"
            onmouseover="this.style.background='#444444';" onmouseout="this.style.background=''" />
<script type="text/javascript">
    Calendar.setup({
        inputField     :    "%s",
        ifFormat       :    "%s",
        button         :    "%s_btn",
        singleClick    :    true,
        showsTime      :    true
    });
</script>"""

class DateTimeWidget(forms.widgets.TextInput):
    dformat = '%Y-%m-%d %H:%M'
    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 != '': 
            try:
                final_attrs['value'] = \
                                   force_unicode(value.strftime(self.dformat))
            except:
                final_attrs['value'] = \
                                   force_unicode(value)
        if not final_attrs.has_key('id'):
            final_attrs['id'] = u'%s_id' % (name)
        id = final_attrs['id']
        
        jsdformat = self.dformat #.replace('%', '%%')
        cal = calbtn % (settings.MEDIA_URL, id, id, jsdformat, id)
        a = u'<input%s />%s' % (forms.util.flatatt(final_attrs), cal)
        return mark_safe(a)

    def value_from_datadict(self, data, files, name):
        dtf = forms.fields.DEFAULT_DATETIME_INPUT_FORMATS
        empty_values = forms.fields.EMPTY_VALUES

        value = data.get(name, None)
        if value in empty_values:
            return None
        if isinstance(value, datetime.datetime):
            return value
        if isinstance(value, datetime.date):
            return datetime.datetime(value.year, value.month, value.day)
        for format in dtf:
            try:
                return datetime.datetime(*time.strptime(value, format)[:6])
            except ValueError:
                continue
        return None

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Comments

pigletto (on September 3, 2007):

There was a little bug with unnecessary replacing percent sign in line: jsdformat = self.dformat.replace('%', '%%')

This is fixed now.

#

pigletto (on September 5, 2007):

Method value_from_datadict has been added so now widget returns datetime.datetime objects

#

pigletto (on September 28, 2007):

Small fix applied to line:

final_attrs['value'] = ...

When user entered wrong value, eg: 'qwerty' as a date it was incorrectly handled.

#

tttallis (on January 22, 2008):

I had to change line 17 to:

import datetime, time

to get this to work.

#

pigletto (on February 7, 2008):

Thanks tttallis, I've updated the code

#

tug (on April 11, 2008):

Update import:

import datetime, time

instead of:

from datetime import datetime, time

My version of «value_from_datadict»:

def value_from_datadict(self, data, files, name):
    value = data.get(name, None)
    if value:
        return datetime.date(*time.strptime(value, self.dformat)[:3])

    return None

#

mirobe (on September 10, 2008):

I needed to use mark_safe with output.

#

nicowaisman (on November 21, 2008):

you will need a:

return mark_safe(a)

if you want to be able to print directly, without using as_p

#

josebenjaminp (on January 30, 2013):

The widget is good! but needs some changes, first, in the <script>

<script type="text/javascript">//<![CDATA[

Calendar.setup({
    inputField : "%s",
    dateFormat : "%s",
    trigger    : "%s_btn",
    onSelect   : function() { this.hide() },
    showTime   : 12
});

//]]></script>

second:

this line is deprecated:

dtf = forms.fields.DEFAULT_DATETIME_INPUT_FORMATS

change and import:

from django.utils import formats

...

dtf = formats.get_format("DATETIME_INPUT_FORMATS")[0]

enjoy!

#

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