JVCL Help:TJvBaseDataItems.IsStreamableItem

 JVCL Help: TJvBaseDataItems.IsStreamableItem Method

TJvBaseDataItems

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Summary

Determines if an item should be stored.

Pascal

 functionIsStreamableItem(Item: IJvDataItem): Boolean; virtual;

Parameters

Parameters	Description
Item: IJvDataItem	Reference to the data item about to be stored.

Description

IsStreamableItem determines if an item should be stored by the filing system (to the form file).
The default implementation allows an item to be stored if it's implementation class is known by the filing system (i.e. RegisterClass has been called for that class) and inherits from TJvBaseDataItem. Descendants can override this method to further expand the conditions (e.g. only items that are deletable). In either case, the item storage mechanism will only allow known classes descending from TJvBaseDataItem to be read back in, so there's no point in removing either of those conditions in the descendants.
If an item should be written to the filing object IsStreamableItem should return True. Otherwise False should be returned.

See Also

TJvBaseDataItems.ReadItems

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