diff options
Diffstat (limited to 'doc/src/q3dict.qdoc')
| -rw-r--r-- | doc/src/q3dict.qdoc | 446 |
1 files changed, 0 insertions, 446 deletions
diff --git a/doc/src/q3dict.qdoc b/doc/src/q3dict.qdoc deleted file mode 100644 index 3f79901..0000000 --- a/doc/src/q3dict.qdoc +++ /dev/null @@ -1,446 +0,0 @@ -/**************************************************************************** -** -** 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 Technology Preview License Agreement accompanying -** this package. -** -** 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 1.1, included in the file LGPL_EXCEPTION.txt in this -** package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -/*! - \class Q3Dict - \brief The Q3Dict class is a template class that provides a - dictionary based on QString keys. - \compat - - Q3Dict is implemented as a template class. Define a template - instance Q3Dict\<X\> to create a dictionary that operates on - pointers to X (X *). - - A dictionary is a collection of key-value pairs. The key is a - QString used for insertion, removal and lookup. The value is a - pointer. Dictionaries provide very fast insertion and lookup. - - If you want to use non-Unicode, plain 8-bit \c char* keys, use the - Q3AsciiDict template. A Q3Dict has the same performance as a - Q3AsciiDict. If you want to have a dictionary that maps QStrings to - QStrings use QMap. - - The size() of the dictionary is very important. In order to get - good performance, you should use a suitably large prime number. - Suitable means equal to or larger than the maximum expected number - of dictionary items. Size is set in the constructor but may be - changed with resize(). - - Items are inserted with insert(); 0 pointers cannot be inserted. - Items are removed with remove(). All the items in a dictionary can - be removed with clear(). The number of items in the dictionary is - returned by count(). If the dictionary contains no items isEmpty() - returns TRUE. You can change an item's value with replace(). Items - are looked up with operator[](), or with find() which return a - pointer to the value or 0 if the given key does not exist. You can - take an item out of the dictionary with take(). - - Calling setAutoDelete(TRUE) for a dictionary tells it to delete - items that are removed. The default behavior is not to delete - items when they are removed. - - When an item is inserted, the key is converted (hashed) to an - integer index into an internal hash array. This makes lookup very - fast. - - Items with equal keys are allowed. When inserting two items with - the same key, only the last inserted item will be accessible (last - in, first out) until it is removed. - - The Q3DictIterator class can traverse the dictionary, but only in - an arbitrary order. Multiple iterators may independently traverse - the same dictionary. - - When inserting an item into a dictionary, only the pointer is - copied, not the item itself, i.e. a shallow copy is made. It is - possible to make the dictionary copy all of the item's data (a - deep copy) when an item is inserted. insert() calls the virtual - function Q3PtrCollection::newItem() for the item to be inserted. - Inherit a dictionary and reimplement newItem() if you want deep - copies. - - When removing a dictionary item, the virtual function - Q3PtrCollection::deleteItem() is called. Q3Dict's default - implementation is to delete the item if auto-deletion is enabled. - - \sa Q3DictIterator, Q3AsciiDict, Q3IntDict, Q3PtrDict -*/ - - -/*! - \fn Q3Dict::Q3Dict( int size, bool caseSensitive ) - - Constructs a dictionary optimized for less than \a size entries. - - We recommend setting \a size to a suitably large prime number - (e.g. a prime that's slightly larger than the expected number of - entries). This makes the hash distribution better which will lead - to faster lookup. - - If \a caseSensitive is TRUE (the default), keys which differ only - by case are considered different. -*/ - -/*! - \fn Q3Dict::Q3Dict( const Q3Dict<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 Q3Dict::~Q3Dict() - - Removes all items from the dictionary and destroys it. If - setAutoDelete() is TRUE, each value is deleted. All iterators that - access this dictionary will be reset. - - \sa setAutoDelete() -*/ - -/*! - \fn Q3Dict<type> &Q3Dict::operator=(const Q3Dict<type> &dict) - - Assigns \a dict to this dictionary and returns a reference to this - dictionary. - - This dictionary is first cleared, 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 Q3Dict::count() const - - Returns the number of items in the dictionary. - - \sa isEmpty() -*/ - -/*! - \fn uint Q3Dict::size() const - - Returns the size of the internal hash array (as specified in the - constructor). - - \sa count() -*/ - -/*! - \fn void Q3Dict::resize( uint newsize ) - - Changes the size of the hash table to \a newsize. The contents of - the dictionary are preserved, but all iterators on the dictionary - become invalid. -*/ - -/*! - \fn bool Q3Dict::isEmpty() const - - Returns TRUE if the dictionary is empty, i.e. count() == 0; - otherwise returns FALSE. - - \sa count() -*/ - -/*! - \fn void Q3Dict::insert( const QString &key, const type *item ) - - Inserts the key \a key with value \a item into the dictionary. - - 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 Q3Dict::replace( const QString &key, const type *item ) - - Replaces the value of the key, \a key with \a item. - - If the item does not already exist, it will be inserted. - - \a item may not be 0. - - Equivalent to: - \snippet doc/src/snippets/code/doc_src_q3dict.qdoc 0 - - If there are two or more items with equal keys, then the last item - that was inserted will be replaced. - - \sa insert() -*/ - -/*! - \fn bool Q3Dict::remove( const QString &key ) - - Removes the item with \a key from the dictionary. Returns TRUE if - successful, i.e. if the item is in the dictionary; otherwise - returns FALSE. - - If there are two or more items with equal keys, then the last item - that was inserted will be removed. - - The removed item is deleted if \link - Q3PtrCollection::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 *Q3Dict::take( const QString &key ) - - Takes the item with \a key out of the dictionary without deleting - it (even if \link Q3PtrCollection::setAutoDelete() - auto-deletion\endlink is enabled). - - If there are two or more items with equal keys, then the last item - that was inserted 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 traversal order. - - \sa remove(), clear(), setAutoDelete() -*/ - -/*! - \fn void Q3Dict::clear() - - Removes all items from the dictionary. - - The removed items are deleted if \link - Q3PtrCollection::setAutoDelete() auto-deletion\endlink is enabled. - - All dictionary iterators that operate on the dictionary are reset. - - \sa remove(), take(), setAutoDelete() -*/ - -/*! - \fn type *Q3Dict::find( const QString &key ) const - - Returns the item with key \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 [] operator. - - \sa operator[]() -*/ - -/*! - \fn type *Q3Dict::operator[]( const QString &key ) const - - Returns the item with key \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 Q3Dict::statistics() const - - Debugging-only function that prints out the dictionary - distribution using qDebug(). -*/ - -/*! - \fn QDataStream& Q3Dict::read( QDataStream &s, Q3PtrCollection::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& Q3Dict::write( QDataStream &s, Q3PtrCollection::Item item ) const - - Writes a dictionary \a item to the stream \a s and returns a - reference to the stream. - - \sa read() -*/ - -/*! - \class Q3DictIterator - \brief The Q3DictIterator class provides an iterator for Q3Dict collections. - \compat - - Q3DictIterator is implemented as a template class. Define a - template instance Q3DictIterator\<X\> to create a dictionary - iterator that operates on Q3Dict\<X\> (dictionary of X*). - - The traversal order is arbitrary; when we speak of the "first", - "last" and "next" item we are talking in terms of this arbitrary - order. - - Multiple iterators may independently traverse the same dictionary. - A Q3Dict knows about all the iterators that are operating on the - dictionary. When an item is removed from the dictionary, Q3Dict - updates all iterators that are referring to the removed item to - point to the next item in the (arbitrary) traversal order. - - Example: - \snippet doc/src/snippets/code/doc_src_q3dict.qdoc 1 - In the example we insert some pointers to line edits into a - dictionary, then iterate over the dictionary printing the strings - associated with the line edits. - - \sa Q3Dict -*/ - -/*! - \fn Q3DictIterator::Q3DictIterator( const Q3Dict<type> &dict ) - - Constructs an iterator for \a dict. The current iterator item is - set to point to the first item in the dictionary, \a dict. First - in this context means first in the arbitrary traversal order. -*/ - -/*! - \fn Q3DictIterator::~Q3DictIterator() - - Destroys the iterator. -*/ - -/*! - \fn uint Q3DictIterator::count() const - - Returns the number of items in the dictionary over which the - iterator is operating. - - \sa isEmpty() -*/ - -/*! - \fn bool Q3DictIterator::isEmpty() const - - Returns TRUE if the dictionary is empty, i.e. count() == 0; - otherwise returns FALSE. - - \sa count() -*/ - -/*! - \fn type *Q3DictIterator::toFirst() - - Resets the iterator, making the first item the first current item. - First in this context means first in the arbitrary traversal - order. Returns a pointer to this item. - - If the dictionary is empty it sets the current item to 0 and - returns 0. -*/ - -/*! - \fn type *Q3DictIterator::operator*() - \internal -*/ - -/*! - \fn Q3DictIterator::operator type*() const - - Cast operator. Returns a pointer to the current iterator item. - Same as current(). -*/ - - -/*! - \fn type *Q3DictIterator::current() const - - Returns a pointer to the current iterator item's value. -*/ - -/*! - \fn QString Q3DictIterator::currentKey() const - - Returns the current iterator item's key. -*/ - -/*! - \fn type *Q3DictIterator::operator()() - - Makes the next 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 *Q3DictIterator::operator++() - - Prefix ++ makes the next 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 *Q3DictIterator::operator+=( uint jump ) - \internal - 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. -*/ |