Navigation: ABC Library Reference > BrowseClass > BrowseClass Properties >====== Sort (browse sort information)  ====== |    |
| Sort | &BrowseSortOrder |
The Sort property is a reference to a structure containing all the sort information for this BrowseClass object. The BrowseClass methods use this property to implement multiple sort orders, range limits, filters, and locators for a single browse list.
Implementation: The BrowseClass.Sort property mimics or shadows the inherited ViewManager.Order property. The Sort property is a reference to a QUEUE declared in ABBROWSE.INC as follows:
BrowseSortOrder QUEUE(SortOrder),TYPE !browse sort information
Locator &LocatorControl !locator for this sort order
Resets &FieldPairsClass !reset fields for this sort order
Thumb &ThumbClass !ThumbClass for this sort order
END
Notice this BrowseSortOrder queue contains all the fields in the SortOrder queue declared in ABFILE.INC as follows:
SortOrder QUEUE,TYPE !VIEW sort information
Filter &FilterQueue !ANDed filter expressions
FreeElement ANY !The Free key element
LimitType BYTE !Range limit type flag
MainKey &KEY !The KEY
Order &STRING !ORDER expression (equal to KEY)
RangeList &FieldPairsClass !fields in the range limit
END
And the SortOrder queue contains a reference to the FilterQueue declared in ABFILE.INC as follows:
FilterQueue QUEUE,TYPE !VIEW filter information
ID STRING(30) !filter ID
Filter &STRING !filter expression
END
So, the BrowseSortOrder queue is, among other things, a queue of queues.
The AddSortOrder method defines sort orders for the browse. The SetSort method applies or activates a sort order for the browse. Only one sort order is active at a time.
See Also: AddSortOrder, SetSort