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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-08 12:31:36 -0600
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+/****************************************************************************
+**
+** QIntDict and QIntDictIterator class documentation
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of the Qt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing retquirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.QPL
+** included in the packaging of this file. Licensees holding valid Qt
+** Commercial 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 WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+
+/*****************************************************************************
+ QIntDict documentation
+ *****************************************************************************/
+
+/*!
+ \class QIntDict qintdict.h
+ \brief The QIntDict class is a template class that provides a dictionary based on long keys.
+
+ \ingroup collection
+ \ingroup tools
+
+ \important autoDelete setAutoDelete
+
+ QMap is an STL-compatible alternative to this class.
+
+ QIntDict is implemented as a template class. Define a template
+ instance QIntDict\<X\> to create a dictionary that operates on
+ pointers to X (X*).
+
+ A dictionary is a collection of key-value pairs. The key is an \c
+ long used for insertion, removal and lookup. The value is a
+ pointer. Dictionaries provide very fast insertion and lookup.
+
+ Example:
+ \code
+ QIntDict<QLineEdit> fields; // long int keys, QLineEdit* values
+ for ( int i = 0; i < 3; i++ )
+ fields.insert( i, new QLineEdit( this ) );
+
+ fields[0]->setText( "Homer" );
+ fields[1]->setText( "Simpson" );
+ fields[2]->setText( "45" );
+
+ QIntDictIterator<QLineEdit> it( fields );
+ for ( ; it.current(); ++it )
+ cout << it.currentKey() << ": " << it.current()->text() << endl;
+
+ for ( int i = 0; i < 3; i++ )
+ cout << fields[i]->text() << " "; // Prints "Homer Simpson 45"
+ cout << endl;
+
+ fields.remove( 1 ); // Does not delete the line edit
+ for ( int i = 0; i < 3; i++ )
+ if ( fields[i] )
+ cout << fields[i]->text() << " "; // Prints "Homer 45"
+ \endcode
+
+ See QDict for full details, including the choice of dictionary
+ size, and how deletions are handled.
+
+ \sa QIntDictIterator, QDict, QAsciiDict, QPtrDict,
+ \link collection.html Collection Classes\endlink
+*/
+
+
+/*!
+ \fn QIntDict::QIntDict( int size )
+
+ Constructs a dictionary using an internal hash array of size \a
+ size.
+
+ Setting \a size to a suitably large prime number (equal to or
+ greater than the expected number of entries) makes the hash
+ distribution better which leads to faster lookup.
+*/
+
+/*!
+ \fn QIntDict::QIntDict( const QIntDict<type> &dict )
+
+ Constructs a copy of \a dict.
+
+ Each item in \a dict is inserted into this dictionary. Only the
+ pointers are copied (shallow copy).
+*/
+
+/*!
+ \fn QIntDict::~QIntDict()
+
+ Removes all items from the dictionary and destroys it.
+
+ All iterators that access this dictionary will be reset.
+
+ \sa setAutoDelete()
+*/
+
+/*!
+ \fn QIntDict<type> &QIntDict::operator=(const QIntDict<type> &dict)
+
+ Assigns \a dict to this dictionary and returns a reference to this
+ dictionary.
+
+ This dictionary is first cleared and then each item in \a dict is
+ inserted into this dictionary. Only the pointers are copied
+ (shallow copy), unless newItem() has been reimplemented.
+*/
+
+/*!
+ \fn uint QIntDict::count() const
+
+ Returns the number of items in the dictionary.
+
+ \sa isEmpty()
+*/
+
+/*!
+ \fn uint QIntDict::size() const
+
+ Returns the size of the internal hash array (as specified in the
+ constructor).
+
+ \sa count()
+*/
+
+/*!
+ \fn void QIntDict::resize( uint newsize )
+
+ Changes the size of the hashtable to \a newsize. The contents of
+ the dictionary are preserved, but all iterators on the dictionary
+ become invalid.
+*/
+
+/*!
+ \fn bool QIntDict::isEmpty() const
+
+ Returns TRUE if the dictionary is empty; otherwise returns FALSE.
+
+ \sa count()
+*/
+
+/*!
+ \fn void QIntDict::insert( long key, const type *item )
+
+ Insert item \a item into the dictionary using key \a key.
+
+ Multiple items can have the same key, in which case only the last
+ item will be accessible using \l operator[]().
+
+ \a item may not be 0.
+
+ \sa replace()
+*/
+
+/*!
+ \fn void QIntDict::replace( long key, const type *item )
+
+ If the dictionary has key \a key, this key's item is replaced with
+ \a item. If the dictionary doesn't contain key \a key, \a item is
+ inserted into the dictionary using key \a key.
+
+ \a item may not be 0.
+
+ Equivalent to:
+ \code
+ QIntDict<char> dict;
+ // ...
+ if ( dict.find(key) )
+ dict.remove( key );
+ dict.insert( key, item );
+ \endcode
+
+ If there are two or more items with equal keys, then the most
+ recently inserted item will be replaced.
+
+ \sa insert()
+*/
+
+/*!
+ \fn bool QIntDict::remove( long key )
+
+ Removes the item associated with \a key from the dictionary.
+ Returns TRUE if successful, i.e. if the \a key is in the
+ dictionary; otherwise returns FALSE.
+
+ If there are two or more items with equal keys, then the most
+ recently inserted item will be removed.
+
+ The removed item is deleted if \link
+ QPtrCollection::setAutoDelete() auto-deletion\endlink is enabled.
+
+ All dictionary iterators that refer to the removed item will be
+ set to point to the next item in the dictionary's traversal
+ order.
+
+ \sa take(), clear(), setAutoDelete()
+*/
+
+/*!
+ \fn type *QIntDict::take( long key )
+
+ Takes the item associated with \a key out of the dictionary
+ without deleting it (even if \link QPtrCollection::setAutoDelete()
+ auto-deletion\endlink is enabled).
+
+ If there are two or more items with equal keys, then the most
+ recently inserted item will be taken.
+
+ Returns a pointer to the item taken out, or 0 if the key does not
+ exist in the dictionary.
+
+ All dictionary iterators that refer to the taken item will be set
+ to point to the next item in the dictionary's traversing order.
+
+ \sa remove(), clear(), setAutoDelete()
+*/
+
+/*!
+ \fn void QIntDict::clear()
+
+ Removes all items from the dictionary.
+
+ The removed items are deleted if \link
+ QPtrCollection::setAutoDelete() auto-deletion\endlink is enabled.
+
+ All dictionary iterators that access this dictionary will be reset.
+
+ \sa remove(), take(), setAutoDelete()
+*/
+
+/*!
+ \fn type *QIntDict::find( long key ) const
+
+ Returns the item associated with \a key, or 0 if the key does not
+ exist in the dictionary.
+
+ If there are two or more items with equal keys, then the most
+ recently inserted item will be found.
+
+ Equivalent to operator[].
+
+ \sa operator[]()
+*/
+
+/*!
+ \fn type *QIntDict::operator[]( long key ) const
+
+ Returns the item associated with \a key, or 0 if the key does not
+ exist in the dictionary.
+
+ If there are two or more items with equal keys, then the most
+ recently inserted item will be found.
+
+ Equivalent to the find() function.
+
+ \sa find()
+*/
+
+/*!
+ \fn void QIntDict::statistics() const
+
+ Debugging-only function that prints out the dictionary
+ distribution using qDebug().
+*/
+
+/*!
+ \fn QDataStream& QIntDict::read( QDataStream &s, QPtrCollection::Item &item )
+
+ Reads a dictionary 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& QIntDict::write( QDataStream &s, QPtrCollection::Item ) const
+
+ Writes a dictionary item to the stream \a s and returns a
+ reference to the stream.
+
+ \sa read()
+*/
+
+/*****************************************************************************
+ QIntDictIterator documentation
+ *****************************************************************************/
+
+/*!
+ \class QIntDictIterator qintdict.h
+ \brief The QIntDictIterator class provides an iterator for QIntDict collections.
+
+ \ingroup collection
+ \ingroup tools
+
+ QIntDictIterator is implemented as a template class. Define a
+ template instance QIntDictIterator\<X\> to create a dictionary
+ iterator that operates on QIntDict\<X\> (dictionary of X*).
+
+ Example:
+ \code
+ QIntDict<QLineEdit> fields;
+ for ( int i = 0; i < 3; i++ )
+ fields.insert( i, new QLineEdit( this ) );
+
+ fields[0]->setText( "Homer" );
+ fields[1]->setText( "Simpson" );
+ fields[2]->setText( "45" );
+
+ QIntDictIterator<QLineEdit> it( fields );
+ for ( ; it.current(); ++it )
+ cout << it.currentKey() << ": " << it.current()->text() << endl;
+
+ // Output (random order):
+ // 0: Homer
+ // 1: Simpson
+ // 2: 45
+ \endcode
+
+ Note that the traversal order is arbitrary; you are not guaranteed the
+ order shown above.
+
+ Multiple iterators may independently traverse the same dictionary.
+ A QIntDict knows about all the iterators that are operating on the
+ dictionary. When an item is removed from the dictionary, QIntDict
+ updates all iterators that refer the removed item to point to the
+ next item in the traversal order.
+
+ \sa QIntDict
+*/
+
+/*!
+ \fn QIntDictIterator::QIntDictIterator( const QIntDict<type> &dict )
+
+ Constructs an iterator for \a dict. The current iterator item is
+ set to point to the 'first' item in the \a dict. The first item
+ refers to the first item in the dictionary's arbitrary internal
+ ordering.
+*/
+
+/*!
+ \fn QIntDictIterator::~QIntDictIterator()
+
+ Destroys the iterator.
+*/
+
+/*!
+ \fn uint QIntDictIterator::count() const
+
+ Returns the number of items in the dictionary this iterator
+ operates over.
+
+ \sa isEmpty()
+*/
+
+/*!
+ \fn bool QIntDictIterator::isEmpty() const
+
+ Returns TRUE if the dictionary is empty; otherwise eturns FALSE.
+
+ \sa count()
+*/
+
+/*!
+ \fn type *QIntDictIterator::toFirst()
+
+ Sets the current iterator item to point to the first item in the
+ dictionary and returns a pointer to the item. The first item
+ refers to the first item in the dictionary's arbitrary internal
+ ordering. If the dictionary is empty it sets the current item to
+ 0 and returns 0.
+*/
+
+/*!
+ \fn QIntDictIterator::operator type *() const
+
+ Cast operator. Returns a pointer to the current iterator item.
+ Same as current().
+*/
+
+/*!
+ \fn type *QIntDictIterator::current() const
+
+ Returns a pointer to the current iterator item.
+*/
+
+/*!
+ \fn long QIntDictIterator::currentKey() const
+
+ Returns the key for the current iterator item.
+*/
+
+/*!
+ \fn type *QIntDictIterator::operator()()
+
+ Makes the succeeding item current and returns the original current
+ item.
+
+ If the current iterator item was the last item in the dictionary
+ or if it was 0, 0 is returned.
+*/
+
+/*!
+ \fn type *QIntDictIterator::operator++()
+
+ Prefix ++ makes the succeeding item current and returns the new
+ current item.
+
+ If the current iterator item was the last item in the dictionary
+ or if it was 0, 0 is returned.
+*/
+
+/*!
+ \fn type *QIntDictIterator::operator+=( uint jump )
+
+ Sets the current item to the item \a jump positions after the
+ current item, and returns a pointer to that item.
+
+ If that item is beyond the last item or if the dictionary is
+ empty, it sets the current item to 0 and returns 0.
+*/