FLASH34: 支援技術が検出された場合に、自動的に再生される音声をオフにする

コード例:

package wcagSamples {
  import flash.accessibility.Accessibility;
  import flash.display.Sprite;
  import flash.net.URLRequest;
  import flash.media.Sound;
  import flash.media.SoundChannel;
  import flash.system.Capabilities;
  import fl.controls.Button;
  import fl.accessibility.ButtonAccImpl;
  import fl.controls.Label;
  import flash.events.MouseEvent;
  
  public class SoundHandler extends Sprite {
    private var snd: Sound = new Sound();
    private var button: Button = new Button();
    private var req: URLRequest = new URLRequest(
      "http://av.adobe.com/podcast/csbu_dev_podcast_epi_2.mp3");
    private var channel: SoundChannel = new SoundChannel();
    private var statusLbl: Label = new Label();
    public function SoundHandler() {
      snd.load(req);
      ButtonAccImpl.enableAccessibility();
      button.x = 10;
      button.y = 10;
      statusLbl.autoSize = "left";
      statusLbl.x = 10;
      statusLbl.y = 40;
      addChild(statusLbl);
      button.addEventListener(MouseEvent.CLICK, clickHandler);
      this.addChild(button);
      if (! Capabilities.hasAccessibility || ! Accessibility.active) {
        channel = snd.play();
        button.label = "Stop Sound";
        statusLbl.text = "No Assistive technology detected. \
          Sound will play automatically";
      } else {
        button.label = "Start Sound";
        statusLbl.text = "Assistive technology detected. \
          Sound will not play automatically";
      }
    }
    private function clickHandler(e: MouseEvent): void {
      if (button.label == "Stop Sound") {
        button.label = "Start Sound";
        channel.stop();
      } else {
        channel = snd.play();
        button.label = "Stop Sound";
      }
    }
  }
}