TListView.OnDataHint property

Declaration

property OnDataHint:;

Description

OnDataHint is a TLVDataHintEvent property with the event handler signalled when a caching hint is received for the list view control.

In virtual mode (OwnerData = True), only the most recently accessed virtual list item exists in the list view control. Data hinting, or pre-fetch caching, allows a range of values to be loaded into the virtual storage for the list items.

Arguments passed to the event handler identify the starting and ending positions for the list items needed for the visible area on the control.

OnDataHint is signalled from the DoOwnerDataHint method, and occurs when a cache hint is received and handled in the widgetset class.

Use the OnData event handler to load the values for the selected list item from the virtual storage.

This description is the one of ComCtrls.TCustomListView.OnDataHint.

See also

• OnData
• OwnerData
• TLVDataHintEvent