| Control Name | Unit | Class |
| Huge List. | ObjStr | THugeList |
Description:
Class THugeList is
16-bit class similar to TList, but the indexes are of type
LongInt, rather than Integer. The size of the list is limited
only by the amount of virtual memory that can be allocated from
Windows. Each item is a Pointer. THugeList never dereferences
this pointer, and it can be any value you want it to be. When
items are deleted from the list and when the list is destroyed,
these items are not freed or dereferenced.
If you know that your indexes will
be smaller than 16K, then use TList, not THugeList, to obtain
better performance. Note that THugeList is not fully optimized
for performance.
NOTE. In 32-bit version the THugeList class is a stub and
declared as THugeList = TList;
Class
TObjectStrings
Class
TObjectStrings is similar to TStringList, but TStringList never
dereferences the pointer, stored in the list as Objects property.
Unlike the TStrings and TStringList, when items are deleted from
the TObjectStrings list and when the list is destroyed, these
items are freed and dereferenced. By default, the DestroyObject
virtual method calls the OnDestroyObject event handler, which
calls TObject.Free to free and dereference the object.
You can change this behavior by specifying what processing you
want to occur in the OnDestroyObject event handler.
Event
OnDestroyObject
Declaration:
OnDestroyObject: TDestroyEvent;
The OnDestroyObject event occurs when a object stored in the list are freed. By default, the DestroyObject method calls the OnDestroyObject event handler, which calls TObject.Free to free and dereference the object. You can change this behavior by specifying what processing you want to occur in the OnDestroyObject event handler.
Method
Remove
Declaration:
procedure Remove(Index: Integer);
Removes the item given by Index from the list. Remove does not destroy of item. If you need to delete and destroy of an item, call Delete method.
Const
MaxHugeListSize
Declaration:
MaxHugeListSize = MaxLongint div SizeOf(Pointer);;
The MaxHugeListSize constant represents the largest number of items a THugeList object can contain.
Type
TDestroyEvent
Declaration:
TDestroyEvent = procedure(Sender, AObject: TObject) of object;
TDestroyEvent is the type of the OnDestroyObject event of the TObjectStrings class.
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Creation Date: 4 Feb 1998 | Last Update: 16 Mar 2000