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/****************************************************************************
** $Id$
**
** Definition of QGList and QGListIterator classes
**
** Created : 920624
**
** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/
#ifndef QGLIST_H
#define QGLIST_H
#ifndef QT_H
#include "qptrcollection.h"
#endif // QT_H
class Q_EXPORT QLNode
{
friend class QGList;
friend class QGListIterator;
public:
QPtrCollection::Item getData() { return data; }
private:
QPtrCollection::Item data;
QLNode *prev;
QLNode *next;
QLNode( QPtrCollection::Item d ) { data = d; }
};
class QGListIteratorList; // internal helper class
class Q_EXPORT QGList : public QPtrCollection // doubly linked generic list
{
friend class QGListIterator;
friend class QGListIteratorList;
friend class QGVector; // needed by QGVector::toList
public:
uint count() const; // return number of nodes
#ifndef QT_NO_DATASTREAM
QDataStream &read( QDataStream & ); // read list from stream
QDataStream &write( QDataStream & ) const; // write list to stream
#endif
protected:
QGList(); // create empty list
QGList( const QGList & ); // make copy of other list
virtual ~QGList();
QGList &operator=( const QGList & ); // assign from other list
bool operator==( const QGList& ) const;
void inSort( QPtrCollection::Item ); // add item sorted in list
void append( QPtrCollection::Item ); // add item at end of list
bool insertAt( uint index, QPtrCollection::Item ); // add item at i'th position
void relinkNode( QLNode * ); // relink as first item
bool removeNode( QLNode * ); // remove node
bool remove( QPtrCollection::Item = 0 ); // remove item (0=current)
bool removeRef( QPtrCollection::Item = 0 ); // remove item (0=current)
bool removeFirst(); // remove first item
bool removeLast(); // remove last item
bool removeAt( uint ); // remove item at i'th position
bool replaceAt( uint, QPtrCollection::Item ); // replace item at position i with item
QPtrCollection::Item takeNode( QLNode * ); // take out node
QPtrCollection::Item take(); // take out current item
QPtrCollection::Item takeAt( uint index ); // take out item at i'th pos
QPtrCollection::Item takeFirst(); // take out first item
QPtrCollection::Item takeLast(); // take out last item
void sort(); // sort all items;
void clear(); // remove all items
int findRef( QPtrCollection::Item, bool = TRUE ); // find exact item in list
int find( QPtrCollection::Item, bool = TRUE ); // find equal item in list
uint containsRef( QPtrCollection::Item ) const; // get number of exact matches
uint contains( QPtrCollection::Item ) const; // get number of equal matches
QPtrCollection::Item at( uint index ); // access item at i'th pos
int at() const; // get current index
QLNode *currentNode() const; // get current node
QPtrCollection::Item get() const; // get current item
QPtrCollection::Item cfirst() const; // get ptr to first list item
QPtrCollection::Item clast() const; // get ptr to last list item
QPtrCollection::Item first(); // set first item in list curr
QPtrCollection::Item last(); // set last item in list curr
QPtrCollection::Item next(); // set next item in list curr
QPtrCollection::Item prev(); // set prev item in list curr
void toVector( QGVector * ) const; // put items in vector
virtual int compareItems( QPtrCollection::Item, QPtrCollection::Item );
#ifndef QT_NO_DATASTREAM
virtual QDataStream &read( QDataStream &, QPtrCollection::Item & );
virtual QDataStream &write( QDataStream &, QPtrCollection::Item ) const;
#endif
private:
void prepend( QPtrCollection::Item ); // add item at start of list
void heapSortPushDown( QPtrCollection::Item* heap, int first, int last );
QLNode *firstNode; // first node
QLNode *lastNode; // last node
QLNode *curNode; // current node
int curIndex; // current index
uint numNodes; // number of nodes
QGListIteratorList *iterators; // list of iterators
QLNode *locate( uint ); // get node at i'th pos
QLNode *unlink(); // unlink node
};
inline uint QGList::count() const
{
return numNodes;
}
inline bool QGList::removeFirst()
{
first();
return remove();
}
inline bool QGList::removeLast()
{
last();
return remove();
}
inline int QGList::at() const
{
return curIndex;
}
inline QPtrCollection::Item QGList::at( uint index )
{
QLNode *n = locate( index );
return n ? n->data : 0;
}
inline QLNode *QGList::currentNode() const
{
return curNode;
}
inline QPtrCollection::Item QGList::get() const
{
return curNode ? curNode->data : 0;
}
inline QPtrCollection::Item QGList::cfirst() const
{
return firstNode ? firstNode->data : 0;
}
inline QPtrCollection::Item QGList::clast() const
{
return lastNode ? lastNode->data : 0;
}
/*****************************************************************************
QGList stream functions
*****************************************************************************/
#ifndef QT_NO_DATASTREAM
Q_EXPORT QDataStream &operator>>( QDataStream &, QGList & );
Q_EXPORT QDataStream &operator<<( QDataStream &, const QGList & );
#endif
/*****************************************************************************
QGListIterator class
*****************************************************************************/
class Q_EXPORT QGListIterator // QGList iterator
{
friend class QGList;
friend class QGListIteratorList;
protected:
QGListIterator( const QGList & );
QGListIterator( const QGListIterator & );
QGListIterator &operator=( const QGListIterator & );
~QGListIterator();
bool atFirst() const; // test if at first item
bool atLast() const; // test if at last item
QPtrCollection::Item toFirst(); // move to first item
QPtrCollection::Item toLast(); // move to last item
QPtrCollection::Item get() const; // get current item
QPtrCollection::Item operator()(); // get current and move to next
QPtrCollection::Item operator++(); // move to next item (prefix)
QPtrCollection::Item operator+=(uint); // move n positions forward
QPtrCollection::Item operator--(); // move to prev item (prefix)
QPtrCollection::Item operator-=(uint); // move n positions backward
protected:
QGList *list; // reference to list
private:
QLNode *curNode; // current node in list
};
inline bool QGListIterator::atFirst() const
{
return curNode == list->firstNode;
}
inline bool QGListIterator::atLast() const
{
return curNode == list->lastNode;
}
inline QPtrCollection::Item QGListIterator::get() const
{
return curNode ? curNode->data : 0;
}
#endif // QGLIST_H
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