progressBar控件完成时给出声音提示.

progressBar控件完成时的效果completeEffect. 示例：

代码：

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/06/30/playing-a-sound-effect-when-a-progressbar-control-completes-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.events.SliderEvent;

            private function slider_change(evt:SliderEvent):void {
                progressBar.setProgress(evt.value, slider.maximum);
            }
        ]]>
    </mx:Script>

    <mx:SoundEffect id="ding"
            source="@Embed('ding.mp3')" /> 

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="percentComplete:">
                <mx:HSlider id="slider"
                        minimum="0"
                        maximum="100"
                        value="0"
                        snapInterval="1"
                        tickInterval="10"
                        liveDragging="true"
                        showTrackHighlight="true"
                        change="slider_change(event);" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

    <mx:ProgressBar id="progressBar"
            mode="manual"
            completeEffect="{ding}" />

</mx:Application>

也可以通过AS实现：

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/06/30/playing-a-sound-effect-when-a-progressbar-control-completes-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white"
        initialize="init();">

    <mx:Script>
        <![CDATA[
            import mx.containers.ApplicationControlBar;
            import mx.containers.Form;
            import mx.containers.FormItem;
            import mx.controls.HSlider;
            import mx.controls.ProgressBar;
            import mx.controls.ProgressBarMode;
            import mx.effects.SoundEffect;
            import mx.events.SliderEvent;

            [Embed("ding.mp3")]
            private var dingMP3:Class;

            private var ding:SoundEffect;
            private var slider:HSlider;
            private var progressBar:ProgressBar;

            private function init():void {
                ding = new SoundEffect();
                ding.source = dingMP3;

                slider = new HSlider();
                slider.minimum = 0;
                slider.maximum = 100;
                slider.value = 0;
                slider.snapInterval = 1;
                slider.tickInterval = 10;
                slider.liveDragging = true;
                slider.setStyle("showtrackHighlight", true);
                slider.addEventListener(SliderEvent.CHANGE,
                            slider_change);

                var formItem:FormItem = new FormItem();
                formItem.label = "percentComplete:";
                formItem.addChild(slider);

                var form:Form = new Form();
                form.styleName = "plain";
                form.addChild(formItem);

                var appControlBar:ApplicationControlBar;
                appControlBar = new ApplicationControlBar();
                appControlBar.dock = true;
                appControlBar.addChild(form);
                Application.application.addChildAt(appControlBar, 0);

                progressBar = new ProgressBar();
                progressBar.mode = ProgressBarMode.MANUAL;
                progressBar.setStyle("completeEffect", ding);
                addChild(progressBar);
            }

            private function slider_change(evt:SliderEvent):void {
                progressBar.setProgress(evt.value, slider.maximum);
            }
        ]]>
    </mx:Script>

</mx:Application>