TLVCompare procedure type
Specifies a routine used to compare the values in two items in a list view control.
Declaration
TLVCompare = function(Item1: TListItem; Item2: TListItem;
AOptionalParam: PtrInt): IntegerArguments
Item1 | First list item for the comparison. |
Item2 | Second list item for the comparison. |
AOptionalParam | Pointer to an optional Integer value used in the comparison. |
Function result
Relative sort order for the specified list items.
Description
TLVCompare is a routine used to determine the relative sort order
for the list items passed in the Item1 and Item2, and allows an optional
Integer parameter value used in the comparison. The return value is the
relative sort order for the
TListItem instances. For example:
- -1
- Item1 comes before Item2 in the sort order.
- 0
- Item1 and Item2 have the same sort order value.
- 1
- Item1 comes after Item2 in the sort order.
A TLVCompare type is passed as an argument to the CustomSort
method in TCustomListView.
See also
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.