Release 0.8

Python3 / Django1.7 support & better testing

.coveragerc

@@ -0,0 +1,2 @@
+[run]
+source = jsignature

.gitignore

@@ -0,0 +1,3 @@
+*.pyc
+.coverage
+htmlcov

.travis.yml

@@ -0,0 +1,42 @@
+language: python
+
+python:
+  - 2.6
+  - 2.7
+  - 3.2
+  - 3.3
+  - 3.4
+
+env:
+  - DJANGO_VERSION=1.4 MODULE=jsignature
+  - DJANGO_VERSION=1.5 MODULE=jsignature
+  - DJANGO_VERSION=1.6 MODULE=jsignature.tests
+  - DJANGO_VERSION=1.7 MODULE=jsignature.tests
+
+install:
+  - pip install -r requirements.txt --use-mirrors
+  - pip install -q Django==$DJANGO_VERSION --use-mirrors
+  - pip install coverage
+
+script: coverage run quicktest.py $MODULE
+
+after_success:
+ - pip install coveralls
+ - coveralls
+
+# We need to exclude old versions of Django for tests with python 3.
+# We need to exclude old versions of Python for tests with Django >= 1.7.
+matrix:
+    exclude:
+        - python: 3.2
+          env: DJANGO_VERSION=1.4 MODULE=jsignature
+        - python: 3.3
+          env: DJANGO_VERSION=1.4 MODULE=jsignature
+        - python: 3.4
+          env: DJANGO_VERSION=1.4 MODULE=jsignature
+        - python: 3.4
+          env: DJANGO_VERSION=1.5 MODULE=jsignature
+        - python: 3.4
+          env: DJANGO_VERSION=1.6 MODULE=jsignature.tests
+        - python: 2.6
+          env: DJANGO_VERSION=1.7 MODULE=jsignature.tests

CHANGES

@@ -0,0 +1,24 @@
+=========
+CHANGELOG
+=========
+
+0.8 (2014-12-04)
+==================
+
+** New **
+
+- Add support for Python 3 (@Gagaro)
+- Add support for Django 1.7 (@Gagaro)
+
+
+0.7.6 (2014-11-26)
+==================
+
+** New features **
+
+- A setting to display (or not) the reset button has been added (@jsayles)
+
+** Internal changes **
+
+- Rendering is now based on a template (@andybak)
+- Javascript is properly initialized (@andybak)

MANIFEST.in

@@ -1,4 +1,4 @@
-include README.rst LICENSE
-recursive-include jsignature/templates *.html
+include README.rst LICENSE CHANGES
 recursive-include jsignature/static *.js
-recursive-include jsignature/static *.css
+recursive-include jsignature/locale *.mo
+recursive-include jsignature/templates *.html

README.md

@@ -1,4 +0,0 @@
-django-jsignature
-=================
-
-Use jSignature jQuery plugin in your django projects

README.rst

@@ -1,12 +1,145 @@
-==================
-django-jsignature
-==================
-
 A simple way to use `jSignature jQuery plugin <https://github.com/brinley/jSignature/blob/master/README.md>`_ in your `Django <https://www.djangoproject.com>`_ projects.
 
 It provides:
 
 * A form field and a form widget to handle jquery plugin through a Django form;
 * A model field to store a captured signature;
-* A mixin adding two fields (signature / signature_date) in any of your Django models;
+* A mixin adding two fields (signature / signature_date) in any of your Django models.
+
+.. image:: https://travis-ci.org/fle/django-jsignature.png?branch=master
+        :target: https://travis-ci.org/fle/django-jsignature
+
+.. image:: https://coveralls.io/repos/fle/django-jsignature/badge.png
+       :target: https://coveralls.io/r/fle/django-jsignature
+
+
+.. image:: https://github.com/fle/django-jsignature/blob/master/screen.png
+
+==================
+INSTALL
+==================
+
+For now:
+
+::
+
+    pip install django-jsignature
+
+==================
+USAGE
+==================
+
+* Add ``jsignature`` to your ``INSTALLED_APPS``:
+
+::
+
+    # settings.py
+    INSTALLED_APPS = (
+    ...
+    'jsignature',
+    )
+
+* Use provided form field and widget:
+
+::
+
+    # forms.py
+    from django import forms
+    from jsignature.forms import JSignatureField
+
+    class SignatureForm(forms.Form):
+        signature = JSignatureField()
+
+* In your template
+
+::
+
+    {{ form.media }}
+    <form action="." method="POST">
+        {% for field in form %}
+            {{ field.label_tag }}
+            {{ field }}
+        {% endfor %}
+        <input type="submit" value="Save"/>
+        {% csrf_token %}
+    </form>
+
+* Render image after form validation:
+
+::
+
+    # views.py
+    from jsignature.utils import draw_signature
+    from myapp.forms import SignatureForm
+
+    def my_view(request):
+        form = SignatureForm(request.POST or None)
+        if form.is_valid():
+            signature = form.cleaned_data.get('signature')
+            if signature:
+                # as an image
+                signature_picture = draw_signature(signature)
+                # or as a file
+                signature_file_path = draw_signature(signature, as_file=True)
+
+==================
+CUSTOMIZATION
+==================
+
+JSignature plugin options are available in python:
+
+* Globally, in your settings:
+
+::
+
+    # settings.py
+    JSIGNATURE_WIDTH = 500
+    JSIGNATURE_HEIGHT = 200
+
+* Specifically, in your form:
+
+::
+
+    # forms.py
+    from jsignature.forms import JSignatureField
+    from jsignature.widgets import JSignatureWidget
+
+    JSignatureField(widget=JSignatureWidget(jsignature_attrs={'color': '#CCC'}))
+
+Available settings are:
+
+* ``JSIGNATURE_WIDTH`` (width)
+* ``JSIGNATURE_HEIGHT`` (height)
+* ``JSIGNATURE_COLOR`` (color)
+* ``JSIGNATURE_BACKGROUND_COLOR`` (background-color)
+* ``JSIGNATURE_DECOR_COLOR`` (decor-color)
+* ``JSIGNATURE_LINE_WIDTH`` (lineWidth)
+* ``JSIGNATURE_UNDO_BUTTON`` (UndoButton)
+* ``JSIGNATURE_RESET_BUTTON`` (ResetButton)
+
+==================
+IN YOUR MODELS
+==================
+
+If you wan to store signatures, provided mixin gives a ``signature`` and a ``signature_date`` that update themselves:
+
+::
+
+    from django.db import models
+    from jsignature.mixins import JSignatureFieldsMixin
+
+    class JSignatureModel(JSignatureFieldsMixin):
+        name = models.CharField()
+
+
+==================
+AUTHORS
+==================
+
+    * Florent Lebreton <florent.lebreton@makina-corpus.com>
+
+|makinacom|_
+
+.. |makinacom| image:: http://depot.makina-corpus.org/public/logo.gif
+.. _makinacom:  http://www.makina-corpus.com
 

jsignature/fields.py

@@ -3,17 +3,21 @@
     with jSignature jQuery plugin
 """
 import json
-from django.db import models
-from django.core import validators
-from django.core.exceptions import ValidationError
-from .forms import JSignatureField as JSignatureFormField
+import six
 
-class JSignatureField(models.Field):
+from django.db import models
+from django.core.exceptions import ValidationError
+
+from .forms import (
+    JSignatureField as JSignatureFormField,
+    JSIGNATURE_EMPTY_VALUES)
+
+
+class JSignatureField(six.with_metaclass(models.SubfieldBase, models.Field)):
     """
     A model field handling a signature captured with jSignature
     """
     description = "A signature captured with jSignature"
-    __metaclass__ = models.SubfieldBase
 
     def get_internal_type(self):
         return 'TextField'
@@ -23,7 +27,7 @@ class JSignatureField(models.Field):
         Validates that the input can be red as a JSON object. Returns a Python
         datetime.date object.
         """
-        if value in validators.EMPTY_VALUES:
+        if value in JSIGNATURE_EMPTY_VALUES:
             return None
         elif isinstance(value, list):
             return value
@@ -33,12 +37,9 @@ class JSignatureField(models.Field):
             raise ValidationError('Invalid JSON format.')
 
     def get_prep_value(self, value):
-        return self.to_python(value)
-
-    def get_db_prep_value(self, value, connection, prepared=False):
-        if value in validators.EMPTY_VALUES:
+        if value in JSIGNATURE_EMPTY_VALUES:
             return None
-        elif isinstance(value, basestring):
+        elif isinstance(value, six.string_types):
             return value
         elif isinstance(value, list):
             return json.dumps(value)
@@ -49,6 +50,8 @@ class JSignatureField(models.Field):
         defaults.update(kwargs)
         return super(JSignatureField, self).formfield(**defaults)
 
-
+try:
     from south.modelsinspector import add_introspection_rules
     add_introspection_rules([], ["jsignature.fields.JSignatureField"])
+except ImportError:
+    pass

jsignature/forms.py

@@ -8,6 +8,9 @@ from django.core import validators
 from django.core.exceptions import ValidationError
 from .widgets import JSignatureWidget
 
+JSIGNATURE_EMPTY_VALUES = validators.EMPTY_VALUES + ('[]', )
+
+
 class JSignatureField(Field):
     """
     A field handling a signature capture field with with jSignature
@@ -16,10 +19,10 @@ class JSignatureField(Field):
 
     def to_python(self, value):
             """
-            Validates that the input can be red as a JSON object. Returns a Python
-            datetime.date object.
+            Validates that the input can be red as a JSON object.
+            Returns a Python list (JSON object unserialized).
             """
-            if value in validators.EMPTY_VALUES:
+            if value in JSIGNATURE_EMPTY_VALUES:
                 return None
             try:
                 return json.loads(value)

jsignature/locale/fr/LC_MESSAGES/django.po

@@ -0,0 +1,30 @@
+# French translation for django-jsignature package.
+# Copyright (C) 2013
+# This file is distributed under the same license as the django-jsignature package.
+# Florent Lebreton <florent.lebreton@makina-corpus.com>
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: \n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2013-09-18 11:10+0200\n"
+"PO-Revision-Date: 2013-09-18 11:13+0100\n"
+"Last-Translator: Florent Lebreton <lebreton.florent@wanadoo.fr>\n"
+"Language-Team: contact@makina-corpus.com\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"X-Generator: Poedit 1.5.4\n"
+
+#: mixins.py:13
+msgid "Signature"
+msgstr "Signature"
+
+#: mixins.py:17
+msgid "Signature date"
+msgstr "Date de signature"
+
+#: widgets.py:65
+msgid "Reset"
+msgstr "Réinitialiser"

jsignature/mixins.py

@@ -7,6 +7,7 @@ from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from .fields import JSignatureField
 
+
 class JSignatureFieldsMixin(models.Model):
     """ Mixin class providing fields to store a signature with jSignature """
     signature = JSignatureField(
@@ -24,9 +25,8 @@ class JSignatureFieldsMixin(models.Model):
     def save(self, *args, **kwargs):
 
         is_new = self.pk is None
-        original = not is_new and self.__class__.objects.get(pk=self.pk) or None
+        original = not is_new and self.__class__.objects.get(pk=self.pk)
 
-        print self.signature
         if self.signature:
             if is_new or self.signature != original.signature:
                 self.signature_date = datetime.now()

jsignature/settings.py

@@ -1,12 +1,21 @@
 from django.conf import settings
 
-JSIGNATURE_WIDTH = getattr(settings, 'JSIGNATURE_WIDTH', 'ratio')
-JSIGNATURE_HEIGHT = getattr(settings, 'JSIGNATURE_HEIGHT', 'ratio')
-JSIGNATURE_COLOR = getattr(settings, 'JSIGNATURE_COLOR', '#000')
-JSIGNATURE_BACKGROUND_COLOR = getattr(settings, 'JSIGNATURE_BACKGROUND_COLOR', '#FFF')
-JSIGNATURE_DECOR_COLOR = getattr(settings, 'JSIGNATURE_DECOR_COLOR', '#DDD')
-JSIGNATURE_LINE_WIDTH = getattr(settings, 'JSIGNATURE_LINE_WIDTH', 0)
-JSIGNATURE_UNDO_BUTTON =  getattr(settings, 'JSIGNATURE_UNDO_BUTTON', False)
+JSIGNATURE_WIDTH = getattr(
+    settings, 'JSIGNATURE_WIDTH', 'ratio')
+JSIGNATURE_HEIGHT = getattr(
+    settings, 'JSIGNATURE_HEIGHT', 'ratio')
+JSIGNATURE_COLOR = getattr(
+    settings, 'JSIGNATURE_COLOR', '#000')
+JSIGNATURE_BACKGROUND_COLOR = getattr(
+    settings, 'JSIGNATURE_BACKGROUND_COLOR', '#FFF')
+JSIGNATURE_DECOR_COLOR = getattr(
+    settings, 'JSIGNATURE_DECOR_COLOR', '#DDD')
+JSIGNATURE_LINE_WIDTH = getattr(
+    settings, 'JSIGNATURE_LINE_WIDTH', 0)
+JSIGNATURE_UNDO_BUTTON = getattr(
+    settings, 'JSIGNATURE_UNDO_BUTTON', False)
+JSIGNATURE_RESET_BUTTON = getattr(
+    settings, 'JSIGNATURE_RESET_BUTTON', True)
 
 JSIGNATURE_DEFAULT_CONFIG = {
     'width': JSIGNATURE_WIDTH,
@@ -16,4 +25,5 @@ JSIGNATURE_DEFAULT_CONFIG = {
     'decor-color': JSIGNATURE_DECOR_COLOR,
     'lineWidth': JSIGNATURE_LINE_WIDTH,
     'UndoButton': JSIGNATURE_UNDO_BUTTON,
+    'ResetButton': JSIGNATURE_RESET_BUTTON,
 }

jsignature/static/js/django_jsignature.js

@@ -1,15 +1,21 @@
 $(document).ready(function() {
+  $(".jsign-container").each(function(){
+    var config = $(this).data('config');
+    var value = $(this).data('initial-value');
+    $(this).jSignature(config);
+    $(this).jSignature("setData", value, "native");
+  });
 
   /* Each time user is done drawing a stroke, update value of hidden input */
-  $(document).delegate(".jsign-container", "change", function(e) {
+  $(".jsign-container").on("change", function(e) {
     var jSignature_data = $(this).jSignature('getData', 'native');
-    var django_field_name = $(this).attr('id').split('_')[1];
+    var django_field_name = $(this).attr('id').split(/_(.+)/)[1];
     $('#id_' + django_field_name).val(JSON.stringify(jSignature_data));
   });
 
   /* Bind clear button */
-  $(document).delegate(".jsign-wrapper input", "click", function(e) {
+  $(".jsign-wrapper input").on("click", function(e) {
     $(this).siblings('.jsign-container').jSignature('reset');
   });
 
-})
+});

jsignature/templates/jsignature/widget.html

@@ -0,0 +1,10 @@
+<div class='jsign-wrapper'>
+  {{ hidden }}
+  <div id='{{ jsign_id }}'
+       data-config='{{ js_config }}'
+       data-initial-value='{{ value }}'
+       class='jsign-container'></div>
+  {% if config.ResetButton %}
+    <input type='button' value='{{ reset_btn_text }}' class="btn">
+  {% endif %}
+</div>

jsignature/tests/__init__.py

@@ -0,0 +1,5 @@
+from .widgets import JSignatureWidgetTest
+from .forms import JSignatureFormFieldTest
+from .fields import JSignatureFieldTest
+from .mixins import JSignatureFieldsMixinTest
+from .utils import UtilsTest

jsignature/tests/fields.py

@@ -0,0 +1,62 @@
+import json
+import six
+
+from django.test import SimpleTestCase
+from django.core.exceptions import ValidationError
+
+from ..fields import JSignatureField
+from ..forms import JSignatureField as JSignatureFormField
+
+
+class JSignatureFieldTest(SimpleTestCase):
+
+    def test_to_python_empty(self):
+        f = JSignatureField()
+        for val in ['', [], '[]']:
+            self.assertIsNone(f.to_python(val))
+
+    def test_to_python_correct_value_python(self):
+        f = JSignatureField()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        self.assertEquals(val, f.to_python(val))
+
+    def test_to_python_correct_value_json(self):
+        f = JSignatureField()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        val_str = '[{"x":[1,2], "y":[3,4]}]'
+        self.assertEquals(val, f.to_python(val_str))
+
+    def test_to_python_incorrect_value(self):
+        f = JSignatureField()
+        val = 'foo'
+        self.assertRaises(ValidationError, f.to_python, val)
+
+    def test_get_prep_value_empty(self):
+        f = JSignatureField()
+        for val in ['', [], '[]']:
+            self.assertIsNone(f.get_prep_value(val))
+
+    def test_get_prep_value_correct_values_python(self):
+        f = JSignatureField()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        val_prep = f.get_prep_value(val)
+        self.assertIsInstance(val_prep, six.string_types)
+        self.assertEquals(val, json.loads(val_prep))
+
+    def test_get_prep_value_correct_values_json(self):
+        f = JSignatureField()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        val_str = '[{"x":[1,2], "y":[3,4]}]'
+        val_prep = f.get_prep_value(val_str)
+        self.assertIsInstance(val_prep, six.string_types)
+        self.assertEquals(val, json.loads(val_prep))
+
+    def test_get_prep_value_incorrect_values(self):
+        f = JSignatureField()
+        val = type('Foo')
+        self.assertRaises(ValidationError, f.get_prep_value, val)
+
+    def test_formfield(self):
+        f = JSignatureField()
+        cls = f.formfield().__class__
+        self.assertTrue(issubclass(cls, JSignatureFormField))

jsignature/tests/forms.py

@@ -0,0 +1,27 @@
+from django.test import SimpleTestCase
+from django.core.exceptions import ValidationError
+
+from ..widgets import JSignatureWidget
+from ..forms import JSignatureField
+
+
+class JSignatureFormFieldTest(SimpleTestCase):
+
+    def test_widget(self):
+        f = JSignatureField()
+        self.assertIsInstance(f.widget, JSignatureWidget)
+
+    def test_to_python_empty_values(self):
+        f = JSignatureField()
+        for val in ['', [], '[]']:
+            self.assertIsNone(f.to_python(val))
+
+    def test_to_python_correct_values(self):
+        f = JSignatureField()
+        val = '[{"x":[1,2], "y":[3,4]}]'
+        self.assertEquals([{'x': [1, 2], 'y': [3, 4]}], f.to_python(val))
+
+    def test_to_python_incorrect_values(self):
+        f = JSignatureField()
+        val = 'foo'
+        self.assertRaises(ValidationError, f.to_python, val)

jsignature/tests/mixins.py

@@ -0,0 +1,61 @@
+from datetime import date
+from django.conf import settings
+from django.db.models import loading
+from django.test import SimpleTestCase
+from django.core.management import call_command
+
+from .models import JSignatureTestModel
+
+
+class JSignatureFieldsMixinTest(SimpleTestCase):
+
+    def setUp(self):
+        self.old_installed_apps = settings.INSTALLED_APPS
+        settings.INSTALLED_APPS = list(settings.INSTALLED_APPS)
+        settings.INSTALLED_APPS.append('jsignature.tests')
+        loading.cache.loaded = False
+        call_command('syncdb', verbosity=0)
+
+    def tearDown(self):
+        settings.INSTALLED_APPS = self.old_installed_apps
+
+    def test_save_create(self):
+        # If an object is created signed, signature date must be set
+        signature_value = [{"x": [1, 2], "y": [3, 4]}]
+        i = JSignatureTestModel(signature=signature_value)
+        i.save()
+        i = JSignatureTestModel.objects.get(pk=i.pk)
+        self.assertEqual(date.today(), i.signature_date.date())
+
+    def test_save_no_change(self):
+        # If signature doesn't change, signature date must not be updated
+        signature_value = [{"x": [1, 2], "y": [3, 4]}]
+        i = JSignatureTestModel(signature=signature_value)
+        i.save()
+        i.signature_date = date(2013, 1, 1)
+        i.save()
+        i = JSignatureTestModel.objects.get(pk=i.pk)
+        self.assertEqual(date(2013, 1, 1), i.signature_date.date())
+
+    def test_save_change(self):
+        # If signature changes, signature date must be updated too
+        signature_value = [{"x": [1, 2], "y": [3, 4]}]
+        new_signature_value = [{"x": [5, 6], "y": [7, 8]}]
+        i = JSignatureTestModel(signature=signature_value,
+                                signature_date=date(2013, 1, 1))
+        i.save()
+        i.signature_date = date(2013, 1, 1)
+        i.signature = new_signature_value
+        i.save()
+        i = JSignatureTestModel.objects.get(pk=i.pk)
+        self.assertEqual(date.today(), i.signature_date.date())
+
+    def test_save_none(self):
+        # If sinature is set to None, it must be the same for signature_date
+        signature_value = [{"x": [1, 2], "y": [3, 4]}]
+        i = JSignatureTestModel(signature=signature_value)
+        i.save()
+        i.signature = None
+        i.save()
+        i = JSignatureTestModel.objects.get(pk=i.pk)
+        self.assertIsNone(i.signature_date)

jsignature/tests/models.py

@@ -0,0 +1,6 @@
+""" Provides a dummy model implementing JSignatureFieldsMixin """
+from ..mixins import JSignatureFieldsMixin
+
+
+class JSignatureTestModel(JSignatureFieldsMixin):
+    pass

jsignature/tests/utils.py

@@ -0,0 +1,36 @@
+import json
+import os
+import imghdr
+from PIL import Image
+from django.test import SimpleTestCase
+
+from ..utils import draw_signature
+
+DUMMY_VALUE = [{"x": [205, 210], "y": [59, 63]},
+               {"x": [205, 207], "y": [67, 64]}]
+DUMMY_STR_VALUE = json.dumps(DUMMY_VALUE)
+
+
+class UtilsTest(SimpleTestCase):
+
+    def test_inputs_bad_str_value(self):
+        self.assertRaises(ValueError, draw_signature, 'foo_bar')
+
+    def test_inputs_bad_type_value(self):
+        self.assertRaises(ValueError, draw_signature, object())
+
+    def test_inputs_good_list_value(self):
+        draw_signature(DUMMY_VALUE)
+
+    def test_inputs_good_str_value(self):
+        draw_signature(DUMMY_STR_VALUE)
+
+    def test_outputs_as_file(self):
+        output = draw_signature(DUMMY_VALUE, as_file=True)
+        self.assertTrue(os.path.isfile(output))
+        self.assertIsNotNone(imghdr.what(output))
+
+    def test_outputs_as_image(self):
+        output = draw_signature(DUMMY_VALUE)
+        self.assertTrue(issubclass(output.__class__, Image.Image))
+        self.assertTrue(all(output.getbbox()))

jsignature/tests/widgets.py

@@ -0,0 +1,83 @@
+import json
+from pyquery import PyQuery as pq
+import six
+
+from django.test import SimpleTestCase
+from django.core.exceptions import ValidationError
+
+from ..widgets import JSignatureWidget
+from ..settings import JSIGNATURE_HEIGHT
+
+
+class JSignatureWidgetTest(SimpleTestCase):
+
+    def test_default_media(self):
+        widget = JSignatureWidget()
+        media = widget.media
+        media_js = list(media.render_js())
+        self.assertEqual(2, len(media_js))
+        media_js_str = "".join(media_js)
+        self.assertIn('jSignature.min.js', media_js_str)
+        self.assertIn('django_jsignature.js', media_js_str)
+        media_css = list(media.render_css())
+        self.assertEquals([], media_css)
+
+    def test_init(self):
+        w = JSignatureWidget()
+        self.assertEquals({}, w.jsignature_attrs)
+        given_attrs = {'width': 300, 'height': 100}
+        w = JSignatureWidget(jsignature_attrs=given_attrs)
+        self.assertEquals(given_attrs, w.jsignature_attrs)
+
+    def test_build_jsignature_id(self):
+        w = JSignatureWidget()
+        id = w.build_jsignature_id('foo')
+        self.assertEqual('jsign_foo', id)
+
+    def test_build_jsignature_config(self):
+        w = JSignatureWidget(jsignature_attrs={'width': 400})
+        config = w.build_jsignature_config()
+        self.assertEqual(400, config.get('width'))
+        self.assertEqual(JSIGNATURE_HEIGHT, config.get('height'))
+
+    def test_prep_value_empty_values(self):
+        w = JSignatureWidget()
+        for val in ['', [], '[]']:
+            self.assertEqual('[]', w.prep_value(val))
+
+    def test_prep_value_correct_values_python(self):
+        w = JSignatureWidget()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        val_prep = w.prep_value(val)
+        self.assertIsInstance(val_prep, six.string_types)
+        self.assertEquals(val, json.loads(val_prep))
+
+    def test_prep_value_correct_values_json(self):
+        w = JSignatureWidget()
+        val = [{"x": [1, 2], "y": [3, 4]}]
+        val_str = '[{"x":[1,2], "y":[3,4]}]'
+        val_prep = w.prep_value(val_str)
+        self.assertIsInstance(val_prep, six.string_types)
+        self.assertEquals(val, json.loads(val_prep))
+
+    def test_prep_value_incorrect_values(self):
+        w = JSignatureWidget()
+        val = type('Foo')
+        self.assertRaises(ValidationError, w.prep_value, val)
+
+    def test_render(self):
+        w = JSignatureWidget()
+        output = w.render(name='foo', value=None)
+        # Almost useless :/
+        self.assertEqual(1, len(pq('.jsign-wrapper', output)))
+        self.assertEqual(1, len(pq('[type=hidden]', output)))
+
+    def test_render_reset_button_true(self):
+        w = JSignatureWidget(jsignature_attrs={'ResetButton': True})
+        output = w.render(name='foo', value=None)
+        self.assertEqual(1, len(pq('[type=button]', output)))
+
+    def test_render_reset_button_false(self):
+        w = JSignatureWidget(jsignature_attrs={'ResetButton': False})
+        output = w.render(name='foo', value=None)
+        self.assertEqual(0, len(pq('[type=button]', output)))

jsignature/utils.py

@@ -3,13 +3,12 @@
     https://github.com/zivezab/django-autograph/blob/master/autograph/utils.py
 """
 import json
-import cStringIO
 from itertools import chain
-from tempfile import NamedTemporaryFile
 from PIL import Image, ImageDraw, ImageOps
 
 AA = 5  # super sampling gor antialiasing
 
+
 def draw_signature(data, as_file=False):
     """ Draw signature based on lines stored in json_string.
         `data` can be a json object (list in fact) or a json string
@@ -24,15 +23,16 @@ def draw_signature(data, as_file=False):
         raise ValueError
 
     # Compute box
-    width = max(chain(*[d['x'] for d in data])) + 10
-    height = max(chain(*[d['y'] for d in data])) + 10
+    width = max(chain(*[d['x'] for d in drawing])) + 10
+    height = max(chain(*[d['y'] for d in drawing])) + 10
 
     # Draw image
     im = Image.new("RGBA", (width*AA, height*AA))
     draw = ImageDraw.Draw(im)
     for line in drawing:
         len_line = len(line['x'])
-        points = [(line['x'][i]*AA, line['y'][i]*AA) for i in range(0, len_line)]
+        points = [(line['x'][i]*AA, line['y'][i]*AA)
+                  for i in range(0, len_line)]
         draw.line(points, fill="#000", width=2*AA)
     im = ImageOps.expand(im)
     # Smart crop
@@ -45,7 +45,6 @@ def draw_signature(data, as_file=False):
     if as_file:
         ret = im._dump(format='PNG')
     else:
-        ret = img
+        ret = im
 
     return ret
-

jsignature/widgets.py

@@ -3,16 +3,29 @@
     with jSignature jQuery plugin
 """
 import json
+import six
+
+from django.template.loader import render_to_string
 from django.forms.widgets import HiddenInput
+from django.core import validators
+from django.core.exceptions import ValidationError
+
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
 from jsignature.settings import JSIGNATURE_DEFAULT_CONFIG
 
+JSIGNATURE_EMPTY_VALUES = validators.EMPTY_VALUES + ('[]', )
+
+
 class JSignatureWidget(HiddenInput):
     """
     A widget handling a signature capture field with with jSignature
     """
 
+    # Actually, this widget has a display so we want it to behave like a
+    # normal field, not a hidden one
+    is_hidden = False
+
     class Media:
         js = ('js/jSignature.min.js',
               'js/django_jsignature.js')
@@ -22,20 +35,48 @@ class JSignatureWidget(HiddenInput):
         # Store jSignature js config
         self.jsignature_attrs = jsignature_attrs or {}
 
-    def render(self, name, value, attrs=None):
-
-        # Build config
-        jsign_id = 'jsign_%s' % name
+    def build_jsignature_config(self):
+        """ Build javascript config for jSignature initialization.
+            It's a dict with for which default values come from settings
+            and can be overriden by jsignature_attrs, given at widget
+            instanciation time """
         jsignature_config = JSIGNATURE_DEFAULT_CONFIG.copy()
         jsignature_config.update(self.jsignature_attrs)
+        return jsignature_config
+
+    def build_jsignature_id(self, name):
+        """ Build HTML id for jsignature container.
+            It's important because it's used in javascript code """
+        return 'jsign_%s' % name
+
+    def prep_value(self, value):
+        """ Prepare value before effectively render widget """
+        if value in JSIGNATURE_EMPTY_VALUES:
+            return "[]"
+        elif isinstance(value, six.string_types):
+            return value
+        elif isinstance(value, list):
+            return json.dumps(value)
+        raise ValidationError('Invalid format.')
+
+    def render(self, name, value, attrs=None):
+        """ Render widget """
+        # Build config
+        jsign_id = self.build_jsignature_id(name)
+        jsignature_config = self.build_jsignature_config()
+
+        # Prepare value
+        value = self.prep_value(value)
 
         # Build output
-        hidden_input = super(JSignatureWidget, self).render(name, value, attrs)
-        div = u'<div id="%s" class="jsign-container"></div>' % jsign_id
-        clr = u'<input type="button" value="%s" class="btn">' % _('Reset')
-        js  = u'$("#%s").jSignature(%s);' % (jsign_id, json.dumps(jsignature_config))
-        js += u'$("#%s").jSignature("setData", %s,"native");' % (jsign_id, json.dumps(value))
-        js  = u'<script type="text/javascript">%s</script>' % js
-        out = u'<div class="jsign-wrapper">%s%s%s%s</div>' % (hidden_input, div, clr, js)
+        context = {
+            'hidden': super(JSignatureWidget, self).render(name, value, attrs),
+            'jsign_id': jsign_id,
+            'reset_btn_text': _('Reset'),
+            'config': jsignature_config,
+            'js_config': mark_safe(json.dumps(jsignature_config)),
+            'value': mark_safe(value),
+        }
+        out = render_to_string('jsignature/widget.html', context)
 
         return mark_safe(out)

quicktest.py

@@ -0,0 +1,82 @@
+import os
+import sys
+import argparse
+from django.conf import settings
+
+
+class QuickDjangoTest(object):
+    """
+    A quick way to run the Django test suite without a fully-configured project.
+
+    Example usage:
+
+        >>> QuickDjangoTest('app1', 'app2')
+
+    Based on a script published by Lukasz Dziedzia at:
+    http://stackoverflow.com/questions/3841725/how-to-launch-tests-for-django-reusable-app
+    """
+    DIRNAME = os.path.dirname(__file__)
+    INSTALLED_APPS = (
+    )
+
+    def __init__(self, *args, **kwargs):
+        self.apps = args
+        self.run_tests()
+
+    def run_tests(self):
+        """
+        Fire up the Django test suite developed for version 1.2
+        """
+        settings.configure(
+            TEMPLATE_DIRS = ('jsignature/templates/',),
+            ROOT_URLCONF = 'jsignature.tests',
+            DEBUG = True,
+            DATABASES = {
+                'default': {
+                    'ENGINE': 'django.db.backends.sqlite3',
+                    'NAME': os.path.join(self.DIRNAME, 'database.db'),
+                    'USER': '',
+                    'PASSWORD': '',
+                    'HOST': '',
+                    'PORT': '',
+                }
+            },
+            MIDDLEWARE_CLASSES = (
+                'django.contrib.sessions.middleware.SessionMiddleware',
+                'django.middleware.common.CommonMiddleware',
+                'django.middleware.csrf.CsrfViewMiddleware',
+                'django.contrib.auth.middleware.AuthenticationMiddleware',
+                'django.contrib.messages.middleware.MessageMiddleware',
+            ),
+            INSTALLED_APPS = self.INSTALLED_APPS + self.apps
+        )
+        # Setup is needed for Django >= 1.7
+        import django
+        if hasattr(django, 'setup'):
+            django.setup()
+        try:
+            from django.test.runner import DiscoverRunner
+            failures = DiscoverRunner().run_tests(self.apps, verbosity=1)
+        except ImportError:
+            # DjangoTestSuiteRunner has been deprecated in Django 1.7
+            from django.test.simple import DjangoTestSuiteRunner
+            failures = DjangoTestSuiteRunner().run_tests(self.apps, verbosity=1)
+        if failures: # pragma: no cover
+            sys.exit(failures)
+
+if __name__ == '__main__':
+    """
+    What do when the user hits this file from the shell.
+
+    Example usage:
+
+        $ python quicktest.py app1 app2
+
+    """
+    parser = argparse.ArgumentParser(
+        usage="[args]",
+        description="Run Django tests on the provided applications."
+    )
+    parser.add_argument('apps', nargs='+', type=str)
+    args = parser.parse_args()
+    QuickDjangoTest(*args.apps)

requirements.txt

@@ -1,2 +1,3 @@
-Django >= 1.4
 pillow
+pyquery
+six

setup.py

@@ -5,24 +5,34 @@ here = os.path.abspath(os.path.dirname(__file__))
 
 setup(
     name='django-jsignature',
-    version='0.7.5.dev0',
+    version='0.8',
     author='Florent Lebreton',
     author_email='florent.lebreton@makina-corpus.com',
-    url='https://github.com/makinacorpus/django-jsignature',
-    download_url = "http://pypi.python.org/pypi/django-jsignature/",
-    description="Use jSignature jQuery plugin in your django projects",
-    long_description=open(os.path.join(here, 'README.rst')).read(),
+    url='https://github.com/fle/django-jsignature',
+    download_url='https://github.com/fle/django-jsignature/tarball/0.8',
+    description='Use jSignature jQuery plugin in your django projects',
+    long_description=open(os.path.join(here, 'README.rst')).read() + '\n\n' +
+        open(os.path.join(here, 'CHANGES')).read(),
     license='LPGL, see LICENSE file.',
     install_requires=['Django'],
     packages=find_packages(),
     include_package_data=True,
     zip_safe=False,
-    classifiers  = ['Topic :: Utilities',
+    classifiers=[
+        'Topic :: Utilities',
         'Natural Language :: English',
         'Operating System :: OS Independent',
         'Intended Audience :: Developers',
         'Environment :: Web Environment',
         'Framework :: Django',
-                    'Development Status :: 4 - Beta',
-                    'Programming Language :: Python :: 2.7'],
+        'Development Status :: 5 - Production/Stable',
+         'Programming Language :: Python',
+         'Programming Language :: Python :: 2',
+         'Programming Language :: Python :: 2.6',
+         'Programming Language :: Python :: 2.7',
+         'Programming Language :: Python :: 3',
+         'Programming Language :: Python :: 3.2',
+         'Programming Language :: Python :: 3.3',
+         'Programming Language :: Python :: 3.4'
+    ],
 )