This document is a draft, and is designed to show changes from a previous version. It is presently showing added text,changed text,deleted text,[start]/[end] markers,and Issue Numbers.
Changes are displayed as follows:
Adobe Flash Professional version MX and higher
Adobe Flex
This technique relates to:
See User Agent Support for Flash for general information on user agent support.
For image based Button components the accessible name needs to be set to provide a functional label. This label indicates the button's function, but does not attempt to describe the image. The label is especially important if there are multiple buttons on the page that each lead to different results.
The accessible name for a button may need to be updated if the button changes during the use of the Flash movie.
In this example, an icon based button is given an accessible name through scripting. When the button is clicked a web page is opened.
Example Code:
//provide text equivalent for image button
this.check_btn.accessibilityProperties = new AccessibilityProperties();
this.check_btn.accessibilityProperties.name = "Check page validation";
//set up event listener and function to navigate to URL
this.check_btn.addEventListener(MouseEvent.CLICK, onClickHandler);
function onClickHandler(e: MouseEvent): void {
var btn = e.target;
var url: String = "http://validator.w3.org";
var request: URLRequest = new URLRequest(url);
navigateToURL(request, '_blank');
}The result is demonstrated in the working version of Accessible name for a simple image button. The source of Accessible name for a simple image button is available.
Example Code:
import fl.controls.Button;
import fl.accessibility.ButtonAccImpl;
ButtonAccImpl.enableAccessibility();
var soundIsMuted = false;
var myButton: Button = new Button();
myButton.label = "";
myButton.x = myButton.y = 10;
myButton.width = myButton.height = 50;
updateAccName(myButton, "mute sound");
myButton.setStyle("icon", unmuted);
myButton.addEventListener(MouseEvent.CLICK, handleBtnClick);
addChild(myButton);
function handleBtnClick(e) {
soundIsMuted = ! soundIsMuted;
myButton.setStyle("icon", soundIsMuted? muted: unmuted);
updateAccName(myButton, soundIsMuted? "unmute sound": "mute sound");
}
function updateAccName(obj, newName: String) {
if (! obj.accessibilityProperties)
obj.accessibilityProperties = new AccessibilityProperties();
obj.accessibilityProperties.name = newName;
if (Capabilities.hasAccessibility)
Accessibility.updateProperties();
}The result is demonstrated in the working version of Accessible name for a dynamic image button. The source of Accessible name for a dynamic image button is available.
When a Flash Movie contains image based buttons, confirm that:
An accessible name is provided for the button that describes the button's action
If the button's action changes (for example when it is clicked) the accessible name changes correspondingly
#1 and #2 are true