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 - - PowerPoint PPT Presentation

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


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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

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SLIDE 2

Who are we? Who are you?

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SLIDE 3

Why A11y

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SLIDE 4

What can you do

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SLIDE 5

Principles of Web Accessibility

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

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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
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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

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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
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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.

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SLIDE 11

Operable User interface components and navigation must be

  • perable
  • Guideline 2.4 - Navigable
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SLIDE 12

Navigable

  • Provide ways to help users

navigate, find content and determine where they are

  • Headings and labels should

be clear and descriptive

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SLIDE 13

Understandable Information and the

  • peration of user interface

must be understandable

  • Guideline 3.2 – Predictable
  • Guideline 3.3 – Input

Assistance

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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.

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SLIDE 15

Robust

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

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SLIDE 16

Testing

  • Keyboard only
  • Color Contrast Checker
  • WAVE (Web Accessibility Evaluation

Tool

  • WCAG 2.0
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SLIDE 17

Tableau Responsibilities

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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
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SLIDE 19

State of Minnesota Tableau Accessibility Team

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SLIDE 20

Predictable and Input Assistance

  • Administrative
  • Testing
  • Design
  • Training
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SLIDE 21

Predictable and Input Assistance

  • Best practices for

design

  • Author views for

accessibility

  • Build data views for

accessibility

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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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