In general, they're prive because we provide an alternate method for changing the datatip that doesn't require subclassing (setting the dataTipFunction on the chart). Depending on the scenario, it feels a little bit like overkill. If I were writing this myself, I would write my own dataTipFunction for the chart, which just cased on the type of the series generating the datatip, and took appropriate action. The only reason I would bother with subclassing the series is if I were trying to wrap up new or modified series types for use in other apps or by other developers. If you really want to keep the datatip functionality encapsulated in the series...The way datatips work is that the series stuffs a reference to its datatip function into the HitData structure before it returns it from the findDataPoints() function. So I would subclass the series, override findDataPoints, call the super() version, and then right before returning the hitData structures generated by the super version, stuff my own altenrate data tip function into the hitData structures. Ely. ________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of parkerwhirlow Sent: Thursday, February 22, 2007 12:59 PM To: [email protected] Subject: [flexcoders] Chart Series - formatDataTip inconsistent visibility I started making some application specific tweaks to the chart series dataTips, and it worked beautifully for ColumnSet (override the protected function formatDataTip), but then I soon realized that only the SET series (subclasses of StackedSeries) have that function as protected. It's actually private on all the standard series. Is there a reason that it's private on the normal series, but protected on the series sets? I am thinking as a workaround, I'll have to do something like this. what do you think? Use the chart's dataTipFunction, and call back into the series (via hitData.element) to a slightly differently named function (myFormatDataTip) defined on the series subclass. I don't like this because then I have to make sure the myFormatDataTip function exists before calling it, and I make assumption about the signature, but I think that would work... comments? thanks, PW
