Techniques for WCAG 2.0

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FLASH16: Making actions keyboard accessible by using the click event on standard components

Important Information about Techniques

See Understanding Techniques for WCAG Success Criteria for important information about the usage of these informative techniques and how they relate to the normative WCAG 2.0 success criteria. The Applicability section explains the scope of the technique, and the presence of techniques for a specific technology does not imply that the technology can be used in all situations to create content that meets WCAG 2.0.


This technique relates to:

User Agent and Assistive Technology Support Notes

See User Agent Support Notes for FLASH16. Also see Flash Technology Notes.


The objective of this technique is to demonstrate how to invoke a scripting function in a way that is keyboard accessible by attaching it to keyboard-accessible, standard Flash components provided by the Adobe Flash Professional authoring tool. In order to ensure that scripted actions can be invoked from the keyboard, they are associated with standard Flash components such as the Button component. The click event of these components is device independent. While the "CLICK" event is a mouse event, it is actually mapped to the default action of a button. The default action occurs when the user clicks the element with a mouse, but it also occurs when the user focuses the element and hits the space key, and when the element is triggered via the accessibility API.


Example 1: Click event on a button

This example shows a button that uses the MouseEvent.CLICK event to change its label. This event will fire both on mouse click and when the space key is pressed

Example Code:

import fl.controls.Button;
import fl.accessibility.ButtonAccImpl;


var testBtn = new Button();
testBtn.label = "click me";
testBtn.addEventListener(MouseEvent.CLICK, clickHandler, false);
testBtn.x = testBtn.y = 10;

function clickHandler(e) { = "Thanks";

This approach is demonstrated in the working version of click event on a button. The source of click event on a button is available.

Example 2: Pending example



When a Flash Movie contains interactive controls, confirm that:

  1. Standard Flash components are used for the controls

  2. The controls use the "click" event

Expected Results

If this is a sufficient technique for a success criterion, failing this test procedure does not necessarily mean that the success criterion has not been satisfied in some other way, only that this technique has not been successfully implemented and can not be used to claim conformance.