listData.rowIndex = indispensable On Feb 6, 2008 7:16 PM, Alex Harui <[EMAIL PROTECTED]> wrote:
> If you assume Arrays, and you can efficiently find the index, then you > can use getItemAt to get the previous item. listData.rowIndex might be > useful > > > ------------------------------ > > *From:* [email protected] [mailto:[EMAIL PROTECTED] *On > Behalf Of *Kevin > *Sent:* Wednesday, February 06, 2008 1:24 PM > *To:* [email protected] > *Subject:* [flexcoders] Display Custom ItemRenderer based on previous > value in List > > > > I am trying to solve a certain design problem and am not sure how to > approach this. > > I have a List control which displays data using a custom ItemRenderer. > I currently listen for a dataChange event and set different > properties of the ItemRenderer based on the data that is being set. > That all works fine. (although it could use some refactoring for > performance). > > However, I now want to set some additional properties based on how > this data compares to the data of the previous item in the list's > dataProvider. > > I am struggling to find the best way to do this. I can get access to > the DataProvider though this.owner.dataProvider, but then I would need > to set up a new cursor, find the current item in the list and then > movePrevious() to compare to the previous item. Of course this would > have to happen each time they renderer was created for a new item in > the list. > > Can anyone think of another more efficient way to achieve this? > > Along the same lines, it would also be nice to create separators in > List controls, but I haven't figured a way to do this either. For > example, if you are displaying a list of 20 scheduled events, it would > be nice to be able to create separator for each different day that the > events happen on. I am guessing I may have to look into extending the > List component for this. > > - Kevin > > >
