I'm using LCDS Paging with large datasets. In the headerRelease event handler, I'm requerying the server to reorder the dataprovider and calling event.preventDefault() to bypass DataGrid's own sorting logic-- which needless to say is useless for moderate to large datasets when paging.
But calling event.preventDefault() prevents updating the column header to include the appropriate sorting direction indicator (icon). Since I want to use default sorting for smaller datasets, and requery the server for larger datasets, I need to leverage the sort icon in the column header using DataGrid's mechanism if at all possible or else I'll have to override other events that affect the sort direction icon in the header as well and develop a complicated bit of state management. I started down the subclassing road, but quickly discovered DataGrid was never designed for extension (most members are private) and I need to update lastSortIndex and sortIndex before calling placeSortArrow(), but lastSortIndex and sortIndex are private! I've read some related posts, but none that suggests a solution to my problem beyond modifying Flex mx sources, or copying and pasting the DataGrid class--neither of which are acceptable to me. Correct me if I'm wrong, but it appears my only chance is to render the sort direction icon in the column header myself and maintain my own sorting index and direction state. But doing this means I cannot use default sorting or my state will be out of sync with DataGrid's state. It wil take a lot of work to determine what other events can affect the sort direction icon in headers and override those as well just to keep the state synchronized. Anyway, does anyone know of an example of a custom renderer for column headers that includes the sort direction icon? Or am I missing something and there is a public (or protected) method that will allow me to update the sort index members and call placeSortArrow()? Thanks in advance! Erik
