--- In [email protected], nwebb <neilw...@...> wrote: > > Hi, > > I have 2 List components on a page. > The one on the left displays the names of some "bundles" - e.g. "*Bundle 1* > " > The one on the right displays the items in the selected bundle, plus a > percentage value - e.g. "*item1 - 10%*" "*item2 - 55%*" "*item3 - > 61%*" > > The items are the same for all bundles, but their percentages may change as > the user selects different bundles. If that happens I want to highlight that > itemRenderer. (eg when the percentage changes, highlight renderer) > > > I looked at a similar example from Alex Harui - he compares a DataGrid's > listData.UID to the previous UID (stored as a property on the renderer). If > they match, he knows he has the same item and changes that value. > > I have implemented IDropInListItemRenderer (so I have access to the UID) but > the renderer-recycling of the List means that even when the UID's match, the > "oldPercent" value I stored doesn't actually match up to item being > displayed - in other words, the renderer which previously displayed "*item1 > - 10%*" may now be displaying "*item3 - 61%*" , so the percentage HAS > changed, but that's because it's displaying a different item! > > Is my only option to send both the new% and old% in via the dataprovider, or > is there another way to get around this issue? > > Cheers >
Could you use a static Dictionary on the itemRenderer class, with the key being the UID? That way you can get the old% value regardless of whether you're in the same renderer instance?
