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QGLayoutIterator Class Reference

The QGLayoutIterator class is an abstract base class of internal layout iterators. More...

#include <qlayout.h>

List of all member functions.

Public Members

• virtual ~QGLayoutIterator ()
• virtual QLayoutItem * next () = 0
• virtual QLayoutItem * current () = 0
• virtual QLayoutItem * takeCurrent () = 0

Detailed Description

(This class is not OpenGL related, it just happens to start with the letters QGL...)

Subclass this class to create a custom layout. The functions that must be implemented are next(), current(), and takeCurrent().

The QGLayoutIterator implements the functionality of QLayoutIterator. Each subclass of QLayout needs a QGLayoutIterator subclass.

See also Widget Appearance and Style and Layout Management.

Member Function Documentation

QGLayoutIterator::~QGLayoutIterator () [virtual]

QLayoutItem * QGLayoutIterator::current () [pure virtual]

Implemented in subclasses to return the current item, or 0 if there is no current item.

Examples: customlayout/border.cpp, customlayout/card.cpp, and customlayout/flow.cpp.

QLayoutItem * QGLayoutIterator::next () [pure virtual]

Implemented in subclasses to move the iterator to the next item and return that item, or 0 if there is no next item.

Examples: customlayout/border.cpp, customlayout/card.cpp, and customlayout/flow.cpp.

QLayoutItem * QGLayoutIterator::takeCurrent () [pure virtual]

Implemented in subclasses. The function must remove the current item from the layout without deleting it, move the iterator to the next item and return the removed item, or 0 if no item was removed.

Examples: customlayout/border.cpp, customlayout/card.cpp, and customlayout/flow.cpp.

This file is part of the Qt toolkit. Copyright © 1995-2003 Trolltech. All Rights Reserved.