OVERVIEW

Author:	Osi Emoekpere (http://osiloke.com, http://twitter.com/osilocks)
info:	This app extends mezzanine applications by provides an interface for adding dynamic custom content like a twitter mentions widget or slideshow to mezzanine pages.

Features

• Easy and full frontend modification of widgets i.e Adding, Editing and Deleting widgets
• Configuration options for each widget
• Multisite support
• Sortable Widgets
• Mutual exclusivity from django app loader
• Bootstrap theme integration

Requirements

Python

mezzanine 1.x.x django-classy-tags

Javascript

Bootstrap Tooltip Jquery Django Admin Form underscore jQuery UI

Please use widget/widget_loader.html as a reference to add the neccessary js if you do not want to use the {% widget_loader %} tag.

METHODOLOGY

Widgets are placed in the specified slot. Slots are just placeholders inside django templates where widgets are rendered. They are not stored in the database. As a result, a template designer does not worry about syncing the database every time he wants to create a slot in a template. On the other hand, the end user must be aware of the slots available for widgets.

Widget Classes contain the logic used to render each widget and are dynamically loaded at runtime using the same autoloading magic used for django admin.

Setup

Add the widget app to your installed apps after all mezzanine apps in your settings.py:

INSTALLED_APPS = (
    ...
    'widget',
    ...
)

USAGE

Page Widgets

The widget app searches all apps in loaded in django for a file named page_widgets.py. This file contains code which describe how a widget should be rendered. An example widget which displays the addthis links is shown below:

class SocialLogosWidget(WidgetClassBase):
    template = "widgets/social.html"

    def render(self, context, slot, queryset, **kwargs):
        return context

    class Meta:
        name = _("Social Logos")
        author = 'Progweb Team'

This widget just renders the social.html template which contains the addthis links.

Widgets can also have options. A widget which shows mentions of a twitter user is shown below:

class TwitterMentionsWidgets(WidgetClassBase):
    "Displays recent messages for a twitter account, Uses"
    template = "widgets/twitter_mentions.html"

    options = [
        opt(name="Tag", required=True, help_text="#Tag to list"),
        opt(name="Limit", default=3, help_text="Number of tweets to show"),
    ]

    def render(self, context, **kwargs):
        return context

    class Meta:
        name = "Twitter Mentions"
        author = 'Progweb Team'

Widgets are not used in the application until they are registered:

widget_pool.register_widget(SocialLogosWidget)
widget_pool.register_widget(TwitterMentionsWidgets)

The template variable can either be the path to a template file or a string with the template definition

Rendering

Render widgets on a page by first including the widget tag library:

{% load widget_tags %}

You will need to load the javascript code which is used to manipulate widgets. The following should go in your base template:

{% widget_loader %}

Note

This should come after all other javascript declarations. Please make sure you have jquery declared.

The following snippet will render widgets which are assigned to the footer slot.:

{% render_widgets "footer" %}

Adding Widgets

It is really easy to add widgets from the frontend site. Just look for the Add Widget link and click it. You will get a list of widgets to choose from. If the widget has options, you will be able to enter them. Try adding the twitter mentions widget.

Note

Widgets can only be modified on mezzanine pages (for now).

Example Project

Install the widgets app by running:

python setup.py install #From the widget folder

Change directory to the example app and run:

python manage.py createdb --noinput

This will create a demo mezzanine applciation, To test out mezzanine widgets go to any mezzanine page (about, gallery etc) and click the add widget button to add a new widget.

Run tests from the example folder with:

python manage.py test widget --settings=test_settings

TODO

• Better presentation of widget list in frontend.
• More render options, like provide template for widget list wrap
• Bootstrap theme integration