Class TDblQueIterBase

class TDblQueIterBase;

Description

A base class that provides implementation for the doubly linked list iterator.

It also encapsulates a pointer to the current link list element.

The class is abstract and is not intended to be instantiated.

Members

Defined in TDblQueIterBase:

• DoCurrent()Gets the current item in the queue.
• DoPostDec()Gets the current item and then moves to the previous item.
• DoPostInc()Gets the current item and then moves to the next item.
• DoSet(TAny *)Sets the iterator to point to a specific element in the list.
• SetToFirst()Sets the iterator to point to the first element in the doubly linked list.
• SetToLast()Sets the iterator to point to the last element in the doubly linked list. The fu...
• TDblQueIterBase(TDblQueBase &)Constructs the iterator for the specified doubly linked list.
• iHeadPointer to the anchor for the list.
• iNextPointer to the current element.
• iOffsetThe offset of a component link object within elements that form the list.

protected: IMPORT_C TDblQueIterBase(TDblQueBase &aQue);

Description

Constructs the iterator for the specified doubly linked list.

Parameters

IMPORT_C void SetToFirst();

Description

Sets the iterator to point to the first element in the doubly linked list.

The function can be called to re-set the pointer at any time during the iterator's existence.

The function can be called even if the list has no elements.

IMPORT_C void SetToLast();

Description

Sets the iterator to point to the last element in the doubly linked list. The function can be called to re-set the pointer at any time during the iterator's existence.

The function can be called even if the list has no elements.

protected: IMPORT_C TAny* DoPostInc();

Description

Gets the current item and then moves to the next item.

The function is an implementation for TDblQueIter::operator++(TInt).

Return value

protected: IMPORT_C TAny* DoPostDec();

Description

Gets the current item and then moves to the previous item.

The function is an implementation for TDblQueIter::operator--(TInt).

Return value

protected: IMPORT_C TAny* DoCurrent();

Description

Gets the current item in the queue.

The function is an implementation for TDblQueIter::operator T *().

Return value

protected: IMPORT_C void DoSet(TAny *aLink);

Description

Sets the iterator to point to a specific element in the list.

The function is an implementation for TDblQueIter::Set(T &).

Parameters

See also:

• TDblQueIter::Set(T &)Sets the iterator to point to a specific element in the list.

protected: TInt iOffset;

Description

The offset of a component link object within elements that form the list.

protected: TDblQueLinkBase * iHead;

Description

Pointer to the anchor for the list.

protected: TDblQueLinkBase * iNext;

Description

Pointer to the current element.