JVCL Help:TJvBaseDataItem
JVCL Help: TJvBaseDataItem Class
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IJvDataItem
TExtensibleInterfacedPersistent
TJvBaseDataItem
run\JvDataProvider.pas
Summary
Base implementation for the IJvDataItem interface.
Pascal
run\JvDataProvider.pas
TJvBaseDataItem = class(TExtensibleInterfacedPersistent, IJvDataItem);
Description
The TJvBaseDataItem class is the base implementation of the IJvDataItem interface. The class itself provides in the basic implementation for all of the interface's methods. In addition it declares the two methods for IJvDataContextSensitive interface, although the interface is not supported directly.
The class also overrides the reference counting mechanism (_AddRef and _Release) to only perform the reference counting if the owning list is a dynamic list (a list who's items are created when needed but are not stored in a list directly; this is often the case with lists referring to external data, or data stored in other forms).
The class also defines a dummy property for the filing system, so it is able to store the optional sub items of an item.
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