RE: [flexcoders] Re: yField in specific Series types

[Ely Greenfield]

Hi Brendan.  When building an OO framework, there's an endless set of decisions one has to make in trading off between accurately representing commonality and 'is a' relationships, and keeping things simple.  We considered pushing some of the more common fields of the cartesian series into a baseclass inserted between them and the Series base, but opted for simplicity instead.   In this case, you could take advantage of the dynamic side of AS3 and leave the variable untyped.  When a reference is untyped (typed as *), the compiler defers validating property references until the code is run at runtime.   The tradeoff, of course, is that this then becomes a dynamic reference, which sacrifices some performance.  In this case...for a dataTip function, it's probably harmless (i.e., a single dynamic access that's not happening inside a critical loop, or being invoked simultaneously by many components).  But it's a good tradeoff to be aware of in the general case.   Ely.     From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Brendan Meutzner Sent: Monday, June 26, 2006 1:04 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Re: yField in specific Series types I should point out, this is easily bypassed by doing a check inside the function for "event.hitData.element is ColumnSeries/LineSeries" and acting accordingly, but I thought I'd see if Ely :-) had another suggestion. Thanks, Brendan On 6/26/06, Brendan Meutzner <[EMAIL PROTECTED]> wrote: Hi, Came across a bit of an annoyance this morning... I've got a dual-axis chart which displays a LineSeries and a ColumnSeries.  I'd like to use the same dataTipFunction for both Series.  However, if I try to access the yField inside the function for the particular series, I need to cast the type.  Because I'm using two different Series types, this isn't going to fly, but if I relegate to the parent Series class, it doesn't contain the yField property and I get a compile time error.  Ideas? Here's the snippet: returnString += NumberFormatters.thousandsSeperated.format(event.hitData.item[Series(event.hitData.element).yField]) + "\n";                                                                                                                            ^                                                                                                             where the problem occurs Thanks, Brendan                 __._,_.___ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com SPONSORED LINKS Web site design development Computer software development Software design and development Macromedia flex Software development best practice YAHOO! GROUPS LINKS  Visit your group "flexcoders" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. __,_._,___