Complete The Jigsaw

Accessibility, Joomla! Markup languages and

youJoshue O Connor

Senior A11y ConsultantNCBI Centre for Inclusive Technology

CFIT.ie@joshueoconnor

The key to the web is it’s Universality..

How to make this a reality?

Proper use of technology is key..

Open source is great..

I now work for Google..

So what about a11y?

Joomla! is great, but has a way to go.

Whats good about Joomla! and A11y

• Simple• Relatively

Accessible Backend• Able to combine

CSS output with semantically well formed HTML

What can be improved?• Colour contrast in

backend. • Make the Accessible

Backend more accessible (use of ARIA/HTML5)

• Use WYSIWYG that help you author accessible content

Andrea Tarr’s Hathor Accessible Admin Tempate

Hathors A11y Improvements to 1.6• On all pages• Skip to Content• Status Module has text• Accessible Menu• Submenus Accessible (some require *core changes)• Toolbars in a list• Appropriate structural headers• Colors pass WCAG 2.0 AA tests

Hathors A11y Improvements to 1.6• *Accordion panels can be opened by keyboard• *Titles on initial checkboxes in tabular data• WAI-ARIA Roles on structural segments• WAI-ARIA Property/States on Required & Read only form fields• *WAI-ARIA Property/States to flag invalid forms fields• *Removal of jump menu on the "number of pages to display" selection• On pages with template overrides• Appropriate structural headers• Labels for form fields• Titles on form fields for tabular data• Removal of various jump menus that jump you back to the top of the page• Removed tables that were only for layout

• For more see http://community.joomla.org/gsoc2009/andrea-tarr.html

Beez A11y Template [Angie Radtke / Robert Deutz Go to http://www.joomla-beez.com/]

What can you do??• Roll your own accessible template• Separation Anxiety: No Layout Tables (where

possible but not a show stopper), use semantically correct HTML and CSS

• Using Headings to communicate structure• Choose a suitable Colour Scheme• Ensure good Colour contrast (create a high colour

contrast style switcher if possible)

What can you do??• Markup lists, data tables, form controls correctly• Use alternate text to describe functional graphics

– not what they look like• Use descriptive link text• Include the document type and size in an URL for

a downloadable doc [PDF, 1.1 Mbs]• Use null alt=“” values for decorative images• Use the validator but remember that validation !

= a11y

Some useful tools..• The WAVE Toolbar..

• http://wave.webaim.org/

More tools..• Juicy Studio Colour Contrast Analyser

• Juicystudio.com

Free Screen readers..• NVDA

• http://www.nvda-project.org/

Free Screen readers..• ORCA

• http://projects.gnome.org/orca/

A11y now and tomorrow• Follow best practice

(Web Standards)• Explore WAI-ARIA [1] [2]

• Start using HTML5 when, and as needed.

• HTML 5 is NOT an a11y silver bullet

• [1] http://www.w3.org/WAI/intro/aria• [2]

http://dev.opera.com/articles/view/introduction-to-wai-aria/

• Use common sense as a guide

• Get involved in the community

• Use a WYSIWYG that supports a11y

• Create accessible offline documents [PDF etc]

What is WAI-ARIA?• It was a bridging

technology• Used to supply

semantics to Web 2.0 type widgets

• Allows you to describe the ‘role’, ‘state’ and ‘properties’ of custom components

• WAI-ARIA is now a part of HTML 5

• Well worth exploring as it has a rich set of semantics

• Good support in browsers and AT (getting better)

What about HTML5?

HTML 5 and a11y• More semantics• <div> type elements

that you use now have elements like, <header>, <footer>, <nav> (no content element)

• New APIs for client side processing

• There are challenges for a11y such as <canvas>

• Much best practice from HTML4/XHTML 1 can be used in HTML 5, but there is a learning curve

• Not great AT support yet

From html5accessibility.com

THANKS! Questions, Brickbats etc?

Please feel free to drop me a line..

Joshue O ConnorSenior A11y ConsultantNCBI Centre for Inclusive TechnologyCFIT.ieTwitter: @joshueoconnor