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diff --git a/doc/src/classes/q3ptrqueue.qdoc b/doc/src/classes/q3ptrqueue.qdoc new file mode 100644 index 000000000..b3af5f6e7 --- /dev/null +++ b/doc/src/classes/q3ptrqueue.qdoc @@ -0,0 +1,230 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + \class Q3PtrQueue + \brief The Q3PtrQueue class is a template class that provides a queue. + \compat + + Q3ValueVector can be used as an STL-compatible alternative to this + class. + + A template instance Q3PtrQueue\<X\> is a queue that operates on + pointers to X (X*). + + A queue is a first in, first out structure. Items are added to the + tail of the queue with enqueue() and retrieved from the head with + dequeue(). You can peek at the head item without dequeing it using + head(). + + You can control the queue's deletion policy with setAutoDelete(). + + For compatibility with the Q3PtrCollection classes, current() and + remove() are provided; both operate on the head(). + + \sa Q3PtrList Q3PtrStack +*/ + +/*! + \fn Q3PtrQueue::Q3PtrQueue () + + Creates an empty queue with autoDelete() set to FALSE. +*/ + +/*! + \fn Q3PtrQueue::Q3PtrQueue( const Q3PtrQueue<type>& queue ) + + Creates a queue from \a queue. + + Only the pointers are copied; the items are not. The autoDelete() + flag is set to FALSE. +*/ + +/*! + \fn Q3PtrQueue::~Q3PtrQueue() + + Destroys the queue. Items in the queue are deleted if autoDelete() + is TRUE. +*/ + +/*! + \fn Q3PtrQueue<type>& Q3PtrQueue::operator= (const Q3PtrQueue<type>& queue) + + Assigns \a queue to this queue and returns a reference to this + queue. + + This queue is first cleared and then each item in \a queue is + enqueued to this queue. Only the pointers are copied. + + \warning The autoDelete() flag is not modified. If it is TRUE for + both \a queue and this queue, deleting the two lists will cause \e + double-deletion of the items. +*/ + +/*! + \fn bool Q3PtrQueue::isEmpty() const + + Returns TRUE if the queue is empty; otherwise returns FALSE. + + \sa count() dequeue() head() +*/ + +/*! + \fn void Q3PtrQueue::enqueue (const type* d) + + Adds item \a d to the tail of the queue. + + \sa count() dequeue() +*/ + +/*! + \fn type* Q3PtrQueue::dequeue () + + Takes the head item from the queue and returns a pointer to it. + Returns 0 if the queue is empty. + + \sa enqueue() count() +*/ + +/*! + \fn bool Q3PtrQueue::remove() + + Removes the head item from the queue, and returns TRUE if there + was an item, i.e. the queue wasn't empty; otherwise returns FALSE. + + The item is deleted if autoDelete() is TRUE. + + \sa head() isEmpty() dequeue() +*/ + +/*! + \fn void Q3PtrQueue::clear() + + Removes all items from the queue, and deletes them if autoDelete() + is TRUE. + + \sa remove() +*/ + +/*! + \fn uint Q3PtrQueue::count() const + + Returns the number of items in the queue. + + \sa isEmpty() +*/ + +/*! + \fn type* Q3PtrQueue::head() const + + Returns a pointer to the head item in the queue. The queue is not + changed. Returns 0 if the queue is empty. + + \sa dequeue() isEmpty() +*/ + +/*! + \fn Q3PtrQueue::operator type*() const + + Returns a pointer to the head item in the queue. The queue is not + changed. Returns 0 if the queue is empty. + + \sa dequeue() isEmpty() +*/ + +/*! + \fn type* Q3PtrQueue::current() const + + Returns a pointer to the head item in the queue. The queue is not + changed. Returns 0 if the queue is empty. + + \sa dequeue() isEmpty() +*/ + +/*! + \fn bool Q3PtrQueue::autoDelete() const + + Returns the setting of the auto-delete option. The default is + FALSE. + + \sa setAutoDelete() +*/ + +/*! + \fn void Q3PtrQueue::setAutoDelete( bool enable ) + + Sets the queue to auto-delete its contents if \a enable is TRUE + and not to delete them if \a enable is FALSE. + + If auto-deleting is turned on, all the items in a queue are + deleted when the queue itself is deleted. This can be quite + convenient if the queue has the only pointer to the items. + + The default setting is FALSE, for safety. If you turn it on, be + careful about copying the queue: you might find yourself with two + queues deleting the same items. + + \sa autoDelete() +*/ + +/*! + \fn QDataStream& Q3PtrQueue::read( QDataStream& s, + Q3PtrCollection::Item& item ) + + Reads a queue item, \a item, from the stream \a s and returns a + reference to the stream. + + The default implementation sets \a item to 0. + + \sa write() +*/ + +/*! + \fn QDataStream& Q3PtrQueue::write( QDataStream& s, + Q3PtrCollection::Item item ) const + + Writes a queue item, \a item, to the stream \a s and returns a + reference to the stream. + + The default implementation does nothing. + + \sa read() +*/ |