EJSC.AjaxDataHandler.onNeedsData
See Also
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Definition
boolean onNeedsData( EJSC.AjaxDataHandler dataHandler, EJSC.Series series, EJSC.Chart chart ) XMLHttpRequest onNeedsData( EJSC.AjaxDataHandler dataHandler, EJSC.Series series, EJSC.Chart chart )
Description
This event allows for additional control over when and how data is retrieved by the data handler. If assigned, the event will be triggered whenever the its owner series has requested the data handler retrieve its data. The event passes a reference to the current data handler, its owner series and the owner chart.
The result of this event is expected to be either a boolean value or an XMLHttpRequest object which has already been retrieved (responseXML is a valid, well-formed chart xml document).
RESULT:
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