Techniques for WCAG 2.0

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FLASH31: Specifying caption text for a DataGrid


This technique relates to:

User Agent and Assistive Technology Support Notes

See User Agent Support Notes for FLASH31.


The objective of this technique is to programmatically associate captions for DataGrids where captions are provided in the presentation. Normally, the caption for a table is a table identifier and acts like a title or heading for the table.

Flash does not have a caption element for the DataGrid component, but the same effect can be achieved through the following approach:

  1. Place a label component or textfield above the DataGrid, containing the grid's caption text.

  2. Duplicate the caption text and add it as the grid's accessible name. This can either be achieved by setting a value to the grid's "name" field in the Accessibility panel or by setting the grid's property.


Example 1: Associating a label with a DataGrid

This is an example of a DataGrid being added to the stage in Flash Professional from the Components panel. A label element is also added from the Components panel to contain the caption text and the caption text is used in the Accessibility control panel in Flash to serve as the accessibility name for the DataGrid.

Example 2: Associating a caption with a DataGrid using ActiveScript 3

This is a basic AS3 example of a DataGrid generated through scripting. Additionally a label element is created, containing the caption text, and the caption text is added to the grid as an accessible name.

Example Code:

import fl.accessibility.DataGridAccImpl;
import fl.controls.DataGrid;
import fl.controls.Label;
import flash.accessibility.Accessibility;
import flash.accessibility.AccessibilityProperties;
import flash.system.Capabilities;

// enable accessibility for the DataGrid


// set the data grid caption text
var gridCaptionText: String = "Game Results";
gridCaption.text = gridCaptionText;
//add the caption text as the DataGrid's accessible name
var accProps: AccessibilityProperties = new AccessibilityProperties(); = gridCaptionText;
aDg.accessibilityProperties = accProps;
if (Capabilities.hasAccessibility)

function createGrid() {
  //create and add the components
  var aDg: DataGrid = new DataGrid();
  var gridCaption: Label = new Label();
  aDg.move(50, 50);
  gridCaption.move(50, 20);
  var captionFormat: TextFormat = new TextFormat();
  captionFormat.size = 24;
  gridCaption.setStyle("textFormat", captionFormat);
  gridCaption.width = 300;
  gridCaption.height = 100;
  //prepare the data
  var aRoster: Array = new Array();
  aRoster =[ 
    {Name: "Wilma Carter", Bats: "R", Throws: "R", Year: "So", Home: "Redlands, CA"},
    {Name: "Sylvia Munson", Bats: "R", Throws: "R", Year: "Jr", Home: "Pasadena, CA"}, 
    {Name: "Carla Gomez", Bats: "R", Throws: "L", Year: "Sr", Home: "Corona, CA"}, 
    {Name: "Betty Kay", Bats: "R", Throws: "R", Year: "Fr", Home: "Palo Alto, CA"},
  aDg.dataProvider = new DataProvider(aRoster);
  aDg.rowCount = aDg.length;

function bldRosterGrid(dg: DataGrid) {
  dg.setSize(400, 300);
  dg.columns =[ "Name", "Bats", "Throws", "Year", "Home"];
  dg.columns[0].width = 120;
  dg.columns[1].width = 50;
  dg.columns[2].width = 50;
  dg.columns[3].width = 40;
  dg.columns[4].width = 120;

Notes on this code sample:



  1. Check whether the Flash movie contains a DataGrid component.

  2. Confirm that each DataGrid's caption text has been added to the component as an accessible name.

Expected Results

Step 2 is true.

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.

Techniques are Informative

Techniques are informative—that means they are not required. The basis for determining conformance to WCAG 2.0 is the success criteria from the WCAG 2.0 standard—not the techniques. For important information about techniques, please see the Understanding Techniques for WCAG Success Criteria section of Understanding WCAG 2.0.