在FLEX中创建不可以拖拽的ALERT组件.

重点是在鼠标按下的时候调用事件处理程序的stopImmediatePropagation() 方法.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/03/21/creating-an-undraggable-alert-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.controls.Alert;

            private function draggableAlert():void {
                Alert.show("Drag me!");
            }

            private function undraggableAlert():void {
                var alert:Alert = Alert.show("Drag me!");
                alert.addEventListener(MouseEvent.MOUSE_DOWN, alert_mouseDown, true);
            }

            private function alert_mouseDown(evt:MouseEvent):void {
                evt.stopImmediatePropagation();
            }
        ]]>
    </mx:Script>

    <mx:ApplicationControlBar dock="true">
        <mx:Button label="Draggable Alert"
                click="draggableAlert();" />
        <mx:Button label="Undraggable Alert"
                click="undraggableAlert();" />
    </mx:ApplicationControlBar>

</mx:Application>

来自：http://blog.flexexamples.com/2008/03/21/creating-an-undraggable-alert-control-in-flex/