Flex BubbleChart fixed radius

I have a Flex BubbleChart and I want to se开发者_开发技巧t my bubble sizes explicitly. I don't want flex to take care of bubble sizes using minRadius, maxRadius. I need my bubbles to be rendered with exact size value.

Out of curiosity why is it you wouldn't just use the minRadius and maxRadius and set them to have the same value? I dug through the code some and found the radii are used in the BubbleSeries.as in the updateDisplayList(in the 4.0.0 SDK this is on line 938) the conditional that sets up the radius on the objects to be drawn uses the minRadius and maxRadius as constraints so I don't see why this wouldn't achieve the goal. Alternatively you can monkey patch BubbleSeries (or else just extend it and override the updateDisplayList mostly copying the one from the original source with modifications based on your explicitly set radius).