title: Flex BubbleChart - make bubble size relative to size of chart?
body: <p>I'm wondering if there is any way to make the bubble sizes scale or resize when the size of the chart resizes.  If the bubbles are set to a specific pixel size, it seems as though the size is set and that's it.  So, if your chart is large, the bubble is size X and if the chart is small the bubble is still size X.  </p>
  
  <p>Here's a sample app to show you what I mean.  Any help or ideas would be appreciated?</p>
  
  <p>Thanks!</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"&gt;
      &lt;mx:Script&gt;
          &lt;![CDATA[
              import mx.collections.ArrayCollection;
              [Bindable]
              private var s1:ArrayCollection = new ArrayCollection( [
                  {"x": 20, "y": 10, "r":10 },
                  {"x": 40, "y": 5, "r":20 } ,
                  {"x": 60, "y": 0, "r":30 }]);
      ]]&gt;
      &lt;/mx:Script&gt;
  
      &lt;!-- Define custom color and line style for the bubbles. --&gt;
      &lt;mx:SolidColor id="sc1" color="red" alpha=".7"/&gt;
      &lt;mx:Stroke id="stroke1" color="red" weight="2"/&gt;
  
      &lt;mx:BubbleChart id="myChart" showDataTips="true" height="100%" width="100%"&gt; 
          &lt;mx:series&gt;
              &lt;mx:BubbleSeries 
                  dataProvider="{s1}" 
                  displayName="series1" 
                  xField="x" 
                  yField="y" 
                  radiusField="r"
                  selectable="true"
                  fill="{sc1}"
                  stroke="{stroke1}"
              /&gt;
          &lt;/mx:series&gt;   
      &lt;/mx:BubbleChart&gt;
  
  &lt;/mx:Application&gt;
  </code></pre>