Create a HTML page with the layout you want, inclusive of stylesheets and Javascript (preferably Mootools based)
Keep the template initially very basic.
Save this page as index.php page.
The default directory layout is:
- css
- html
- com_<componentname>/ mod_<modulename> (used to override the base templates of Components and Modules)
- images
- js
- templateDetails.xml
- index.php
- favicon.ico
Change/Add the different Joomla constructs
Also updating the related templateDetails.xml with positions and file locations etc.
See a current template for an example of the layout.
Ex.
<?php
// no direct access
defined( '_JEXEC' ) or die( 'Restricted access' );
?>
Header section:
<jdoc:include type="head" />
Your different Modules:
<?php if($this->countModules('search')) : ?>
<jdoc:include type="modules" name="search" />
<?php endif; ?>
<jdoc:include type="module" name="breadcrumbs" />
Your Main Content tag is:
<jdoc:include type="component" />
To allow your template the ability to display debug information add:
<jdoc:include type="modules" name="debug" />
For more advanced additions to a template have a look at the default templates (ja_purity, Beez).
To override component and module layouts copy the layout files of the component or module into a similarly named directory below the html directory of your template and change it.
Edit...
Extra utilities.
- To highlight the used module names in a browser add tp=1 to the end of your URL ex. yourdomain.com?tp=1
- To View an inactive but installed Template add template=template_name. ex. yourdomain.com?template=Beez
These two can be combined, like this. yourdomain.com?template=Beez&tp=1
For more information look at:
- Joomla Template Tutorial Part 1 - Joomla Template Concepts
- How to Create Your First Joomla Template
- Joomla 1.5 Template Tutorial at Compass Design
- Google Joomla templates