Tableau Accessibility What you need to know Lea Dooley | MNIT - - PowerPoint PPT Presentation

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Tableau Accessibility What you need to know Lea Dooley | MNIT Accessibility Coordinator Troy Stein | MNIT Tableau Administrator Kim Wee | Webmaster and Accessibility Coordinator Minnesota GTS IT Symposium | December, 2018 Who are we? Who

SLIDE 1

Tableau Accessibility – What you need to know

Lea Dooley | MNIT Accessibility Coordinator Troy Stein | MNIT Tableau Administrator Kim Wee | Webmaster and Accessibility Coordinator

Minnesota GTS IT Symposium | December, 2018

SLIDE 2

Who are we? Who are you?

SLIDE 3

Why A11y

SLIDE 4

What can you do

SLIDE 5

Principles of Web Accessibility

P – Perceivable O – Operable U – Understandable R - Robust

SLIDE 6

Perceivable

Information and user interface components must be presentable to users in ways they can perceive

Guideline 1.1 – Text

Alternatives

Guideline 1.3 – Adaptable
Guideline 1.4 - Distinguishable

SLIDE 7

Text Alternatives

View Data page to get

underlying data

Create HTML table of data
r other long description
Provide textual description
f visualization content in a

caption

SLIDE 8

Keep It Simple

Keep it simple
Limit the number of marks in the view
Orient your views for legibility
Limit the number of colors and shapes

in a single view

User filters to reduce the number of

marks in the view

Here space has been added to the

view so that text is displayed horizontally instead of vertically

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SLIDE 9

Adaptable

Use of headings
Meaningful Sequence
Responsive design

SLIDE 10

Distinguishable

Use color blind color palette for

marks.

Ensure that there are ways to

distinguish marks other than color: Add shapes to line marks, use begin/end caps or labels.

Use contrast analyzer tools to

choose text colors and backgrounds with sufficient contrast ratios.

SLIDE 11

Operable User interface components and navigation must be

perable
Guideline 2.4 - Navigable

SLIDE 12

Navigable

Provide ways to help users

navigate, find content and determine where they are

Headings and labels should

be clear and descriptive

SLIDE 13

Understandable Information and the

peration of user interface

must be understandable

Guideline 3.2 – Predictable
Guideline 3.3 – Input

Assistance

SLIDE 14

Predictable and Input Assistance

Navigational mechanisms that are

repeated on multiple – following a standardized and predictable workbook set-up

Label controls (filters, highlighters,

parameters) in a way that describes their purpose.

Provide instructions for using

content in text zone on dashboard.

SLIDE 15

Robust

Content must be robust enough that it can be interpreted reliably by a wide variety of user agents, including assistive technologies

SLIDE 16

Testing

Keyboard only
Color Contrast Checker
WAVE (Web Accessibility Evaluation

Tool

WCAG 2.0

SLIDE 17

Tableau Responsibilities

SLIDE 18

Predictable and Input Assistance

Keyboard Accessible
No Keyboard Trap
Guideline 2.4.7 – Focus Visible
Labels or Instructions
Compatible: Name, Role, Value
Meaningful Sequence

SLIDE 19

State of Minnesota Tableau Accessibility Team

SLIDE 20

Predictable and Input Assistance

Administrative
Testing
Design
Training

SLIDE 21

Predictable and Input Assistance

Best practices for

design

Author views for

accessibility

Build data views for

accessibility

SLIDE 22

Thank You!

Lea Dooley

lea.dooley@state.mn.us

Troy Stein Troy.stein@state.mn.us Kim Wee

Kim.wee@state.mn.us

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SLIDE 23

Evaluation Link:

https://www.surveymonkey.com/r/SymThursdayBlock1

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