事件监听位置,该怎么解决

事件监听位置
先看代码吧，这是主文件
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:myCom="*"
layout="absolute" width="600" height="500" >
<mx:ToggleButtonBar id="toggleButton" dataProvider="{control}"  
bottom="0" horizontalCenter="0" toggleOnClick="true" selectedIndex="-1"/>
<mx:ViewStack id="control" width="600" height="500" visible="{toggleButton.selectedIndex > -1}">
<myCom:home/>
</mx:ViewStack>
</mx:Application>

这是home.mxml
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" label="家" width="600" height="400">
</mx:Canvas>

想要的效果是，当在主文件中点击“家”按钮时，主文件可以对点击事件监听，这个监听应该在哪加

[解决办法]
试一下吧：

XML code

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"                layout="absolute"                width="600"                height="500">    <mx:Script>        <![CDATA[            import mx.controls.Alert;                        private function itemClickHandler():void            {                if (control.selectedIndex == 0) {                    Alert.show("点击了家");                }            }        ]]>    </mx:Script>    <mx:ToggleButtonBar id="toggleButton"                        dataProvider="{control}"                        bottom="0"                        horizontalCenter="0"                        toggleOnClick="true"                        itemClick="itemClickHandler()"                        selectedIndex="-1"/>    <mx:ViewStack id="control"                  width="600"                  height="500"                  visible="{toggleButton.selectedIndex > -1}">        <mx:Canvas label="家"                   width="600"                   height="400">        </mx:Canvas>        <mx:Canvas label="学校"                   width="600"                   height="400">        </mx:Canvas>    </mx:ViewStack></mx:Application>