JVCL Help:TJvBaseDataItems.InternalMove

 JVCL Help: TJvBaseDataItems.InternalMove Method

TJvBaseDataItems

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Summary

Responsible for moving an item in the list.

Pascal

 procedureInternalMove(OldIndex: Integer; NewIndex: Integer); virtual; abstract;

Parameters

Parameters	Description
OldIndex: Integer	0-based index of the item to move.
NewIndex: Integer	0-based index the item should be moved to. The item at that location and all following items will move up one position.

Description

InternalMove is responsible for moving an item in the list. The method is declared abstract to allow descendants to determine how to store (and thus move) the item.
InternalMove is called by the ItemMove method when the item can be moved. It doesn't have to notify consumers of the pending move, nor of the completion afterwards. ItemMove will perform those tasks. It is allowed to take additional steps before or after moving if so required (e.g. context specific lists may need to copy the list from the ancestor context first, before a change can be made).
InternalMove should never be called from any other method than ItemMove.

See Also

TJvBaseDataItems.InternalAdd, TJvBaseDataItems.InternalDelete, TJvBaseDataItems.ItemMove

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