/**************************************************************************** ** ** 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 requirements 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\ 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 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 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 &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 &QIntDict::operator=(const QIntDict &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 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\ to create a dictionary iterator that operates on QIntDict\ (dictionary of X*). Example: \code QIntDict 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 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 &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. */