<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/11/04/displaying-all-data-tips-at-once-on-a-flex-piechart-control/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:XML id="dp">
        <products>
            <product label="Product 1" data="3" />
            <product label="Product 2" data="1" />
            <product label="Product 3" data="4" />
            <product label="Product 4" data="1" />
            <product label="Product 5" data="5" />
            <product label="Product 6" data="9" />
        </products>
    </mx:XML>

    <mx:ApplicationControlBar dock="true">
        <mx:CheckBox id="checkBox"
                label="showAllDataTips:"
                labelPlacement="left"
                selected="true" />
    </mx:ApplicationControlBar>

    <mx:PieChart id="pieChart"
            dataProvider="{dp.product}"
            showAllDataTips="{checkBox.selected}"
            height="250"
            width="250">
        <mx:series>
            <mx:PieSeries id="pieSeries"
                    field="@data" />
        </mx:series>
    </mx:PieChart>

</mx:Application>