Customizing TOM Templates
-------------------------

So you’ve got a TOM up and running, and your homepage looks something
like this:

|image0|

This is fine for starting out, but since you’re running a TOM for a
specific project, the homepage ought to reflect that.

If you haven’t already, please read through the `Getting
Started </introduction/getting_started>`__ docs and return here when you
have a project layout that looks something like this:

::

   mytom
   ├── db.sqlite3
   ├── manage.py
   └── mytom
       ├── __init__.py
       ├── settings.py
       ├── urls.py
       └── wsgi.py

We are going to override the html template included with the TOM
Toolkit, ``tom_common/index.html``, so that we can edit some text and
change the image. Overriding and extending templates is `documented
extensively <https://docs.djangoproject.com/en/2.1/howto/overriding-templates/>`__
on Django’s website and we highly recommend reading these docs if you
plan on customizing your TOM further.

Since the template we want to override is already part of the TOM
Toolkit source code, we can use it as a starting point for our
customized template. In fact, we’ll copy and paste the entire thing from
the `source code of TOM
Toolkit <https://github.com/TOMToolkit/tom_base/blob/main/tom_common/templates/tom_common/index.html>`__.
and place it in our project. The template we are looking for is
``tom_common/index.html``

Let’s download and copy that template into our ``templates`` folder
(including the ``tom_common`` sub-directory) so that our directory
structure now looks like this:

::

   mytom
   ├── db.sqlite3
   ├── manage.py
   ├── templates
   │   └── tom_common
   │       └── index.html
   └── mytom
       ├── __init__.py
       ├── settings.py
       ├── urls.py
       └── wsgi.py

Now let’s make a few changes to the ``templates/tom_common/index.html``
template:

.. code:: html

   {% extends 'tom_common/base.html' %}
   {% load static targets_extras observation_extras dataproduct_extras tom_common_extras %}
   {% block title %}Home{% endblock %}
   {% block content %}
   <div class="row">
     <div class="col-md-8">

       <!-- BEGIN MODIFIED CONTENT -->

       <h2 class="text-center">Project LEO</h2>
       <p class="text-center"><img src="https://raw.githubusercontent.com/TOMToolkit/tomtoolkit.github.io/master/assets/img/customize_templates_doc/sciencecat.jpg" class="img-fluid mx-auto"></p>
       <p>Project LEO is a very serious survey of the most important constellation.</p>

       <!-- END MODIFIED CONTENT -->

       <h3>Next steps</h3>
       <ul>
         <li>
           Check out the <a href="https://tom-toolkit.readthedocs.io/en/stable/" title="TOM Toolkit home page">TOM
           Toolkit homepage</a> for the latest news, downloads and documentation.
         </li>
         <li>
           <a href="{% url 'targets:create' %}" title="Create Target">Add your first target</a>.
         </li>
         <li>
           Customize this page by editing the
           <code>templates/index.html</code> file or by editing your
           project's <code>urls.py</code>.
         </li>
         <li>
           Take a look at some <a href="https://tom-toolkit.readthedocs.io/en/stable/customization/common_customizations.html">common first customizations</a>.
         </li>
       </ul>
       <h3>Other Resources</h3>
       <ul>
         <li>The official <a href="https://www.djangoproject.com/">Django documentation</a>.</li>
         <li>The official <a href="http://www.astropy.org/">Astropy documentation</a>.</li>
       </ul>
     </div>
     <div class="col-md-4">
       <div class="card">
         <div class="card-header">
           Latest Comments
         </div>
         {% recent_comments %}
       </div>
       <br/>
       <div class="card">
         <div class="card-header">
           Latest Targets
         </div>
         {% recent_targets %}
     </div>
   </div>
   {% endblock %}

Look for the block of HTML we changed between the <!– BEGIN MODIFIED
CONTENT –> and <!– END MODIFIED CONTENT –> comments. Everything else is
the same as the base template.

We’ve just changed a few lines of HTML, but basically left the template
alone. Reload your homepage, and you should see something like this:

|image1|

Thats it! You’ve just customized your TOM homepage.

Using static files
~~~~~~~~~~~~~~~~~~

Instead of linking to an image hosted online already, we can display
static files in our project directly. For this we will use `Django’s
static
files <https://docs.djangoproject.com/en/2.1/howto/static-files/>`__
capabilities.

Updating Built-in Static Files:
===============================

The TOM Toolkit allows you to easily overwrite some default style settings and image files.
The default static files can be found in the following structure:

::

   mytom
   ├── manage.py
   ├── templates
   ├── mytom
   └── static
       └── tom_common
           ├── css
           │   └── custom.css
           └── img

Customize default CSS:
######################

The default styling is mostly based on Bootstrap v4.6.2 (`https://getbootstrap.com/ <https://getbootstrap.com/>`__).
If you ran the tom_setup script, you should have a directory ``static`` at the top level of your project.
Within this folder, find the ``tom_common/css`` directory. In this folder, is a file named ``custom.css``.
Editing this file will allow you to overwrite any of the custom css used at the base level in the TOM Toolkit.

As an example, let's change the background color from white (#ffffff) to an off-white (#efead6).

.. code:: css

    body {
        background-color: #efead6;
    }

Once you have added these images to the ``static/tom_common/img`` directory and reloaded the page (you may need to
clear the Cache as well), you should now see your changes displayed on the page.

This example is a fairly heavy handed change that will affect the entire TOM including any elements that inherit
from the `body` `background-color`. More subtle and complex changes will require more careful editing of the
``custom.css`` file. Note: you can use your browser's developer tools to inspect the elements of the TOM in order
to determine which css classes are being used and how to best style them.

Customize default Logos and Icons:
##################################

If you ran the tom_setup script, you should have a directory ``static``
at the top level of your project. Within this folder, find the ``tom_common/img`` directory.
In this folder, place the images you’d like to use in your TOM to replace the default TOMToolkit Logos and Icons.
The images should be named as follows:

::

    logo-color.png --> Full Color Logo used on Main Page
    logo-color-cropped.png --> Smaller Logo used on the Navbar
    favicon-32.ico --> Favicon used in the browser tab

The use of `logo-color.png` assumes that you are using the original TOMToolkit html for your homepage.
Specifically, the following line of code should be left intact and not edited as in the example above:

.. code:: html

    <p class="text-center"><img src="{% static 'tom_common/img/logo-color.png' %}" class="img-fluid mx-auto"></p>

Once you have added these images to the ``static/tom_common/img`` directory and reloaded the page (you may need to
clear the Cache as well), you should now see your images displayed instead of the default images provided by TOMToolkit.

Adding Your Own Static Files:
=============================

In some cases you may want to more directly reference a local file.
In this case, you should add a ``img`` directory in the ``static`` directory
at the top level of your project. In this folder, place an image you’d like to display on your
homepage. For example, ``mytom.jpg``.

::

   cp mytom.jpg static/img/

Now let’s edit our template to use Django’s ``static`` template tag to
display the image:

.. code:: html

   {% raw %}
   <p class="text-center"><img src="{% static 'img/mytom.jpg' %}" class="img-fluid mx-auto"></p>
   {% endraw %}

After reloading the page, you should now see ``mytom.jpg`` displayed
instead of the remote cat image.

Further Reading
~~~~~~~~~~~~~~~

Any template included in the TOM Toolkit (or any other Django app) can
be customized. Please see the `official Django
docs <https://docs.djangoproject.com/en/2.1/howto/overriding-templates/>`__
for more details.

.. |image0| image:: /_static/customize_templates_doc/tomhomepagenew.png
.. |image1| image:: /_static/customize_templates_doc/tomhomepagemod.png