How to implement fling result?

Hi, PhiJay,
   Thanks for this great chart! It's beautiful!
    Users can drag the chart(e.g. barchart, after zoom in) as they wish. If they make a fling gesture, however, the chart doesn't response as it should be(fling), it just scolls a little and stops immediately.

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The question is : How to make the chart fling?
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Thanks again! 
