/**************************************************************************** ** ** 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 Q3PtrList \brief The Q3PtrList class is a template class that provides a list. \compat Q3ValueList is an STL-compatible alternative to this class. Define a template instance Q3PtrList\ to create a list that operates on pointers to X (X*). The list class is indexable and has a \link at() current index\endlink and a \link current() current item\endlink. The first item corresponds to index position 0. The current index is -1 if the current item is 0. Items are inserted with prepend(), insert() or append(). Items are removed with remove(), removeRef(), removeFirst() and removeLast(). You can search for an item using find(), findNext(), findRef() or findNextRef(). The list can be sorted with sort(). You can count the number of occurrences of an item with contains() or containsRef(). You can get a pointer to the current item with current(), to an item at a particular index position in the list with at() or to the first or last item with getFirst() and getLast(). You can also iterate over the list with first(), last(), next() and prev() (which all update current()). The list's deletion property is set with setAutoDelete(). \target example Example: \snippet doc/src/snippets/code/doc_src_q3ptrlist.qdoc 0 The output is \snippet doc/src/snippets/code/doc_src_q3ptrlist.qdoc 1 Q3PtrList has several member functions for traversing the list, but using a Q3PtrListIterator can be more practical. Multiple list iterators may traverse the same list, independently of each other and of the current list item. In the example above we make the call setAutoDelete(true). Enabling auto-deletion tells the list to delete items that are removed. The default is to not delete items when they are removed but this would cause a memory leak in the example because there are no other references to the list items. When inserting an item into a list only the pointer is copied, not the item itself, i.e. a shallow copy. It is possible to make the list copy all of the item's data (deep copy) when an item is inserted. insert(), inSort() and append() call the virtual function Q3PtrCollection::newItem() for the item to be inserted. Inherit a list and reimplement newItem() to have deep copies. When removing an item from a list, the virtual function Q3PtrCollection::deleteItem() is called. Q3PtrList's default implementation is to delete the item if auto-deletion is enabled. The virtual function compareItems() can be reimplemented to compare two list items. This function is called from all list functions that need to compare list items, for instance remove(const type*). If you only want to deal with pointers, there are functions that compare pointers instead, for instance removeRef(const type*). These functions are somewhat faster than those that call compareItems(). List items are stored as \c void* in an internal Q3LNode, which also holds pointers to the next and previous list items. The functions currentNode(), removeNode(), and takeNode() operate directly on the Q3LNode, but they should be used with care. The data component of the node is available through Q3LNode::getData(). The Q3StrList class is a list of \c char*. It reimplements newItem(), deleteItem() and compareItems(). (But see QStringList for a list of Unicode QStrings.) \sa Q3PtrListIterator */ /*! \fn Q3PtrList::Q3PtrList() Constructs an empty list. */ /*! \fn Q3PtrList::Q3PtrList( const Q3PtrList &list ) Constructs a copy of \a list. Each item in \a list is \link append() appended\endlink to this list. Only the pointers are copied (shallow copy). */ /*! \fn Q3PtrList::~Q3PtrList() Removes all items from the list and destroys the list. All list iterators that access this list will be reset. \sa setAutoDelete() */ /*! \fn Q3PtrList &Q3PtrList::operator=(const Q3PtrList &list) Assigns \a list to this list and returns a reference to this list. This list is first cleared and then each item in \a list is \link append() appended\endlink to this list. Only the pointers are copied (shallow copy) unless newItem() has been reimplemented. */ /*! \fn bool Q3PtrList::operator==(const Q3PtrList &list ) const Compares this list with \a list. Returns TRUE if the lists contain the same data; otherwise returns FALSE. */ /*! \fn uint Q3PtrList::count() const Returns the number of items in the list. \sa isEmpty() */ /*! \fn bool Q3PtrList::operator!=(const Q3PtrList &list ) const Compares this list with \a list. Returns TRUE if the lists contain different data; otherwise returns FALSE. */ /*! \fn void Q3PtrList::sort() Sorts the list by the result of the virtual compareItems() function. The heap sort algorithm is used for sorting. It sorts n items with O(n*log n) comparisons. This is the asymptotic optimal solution of the sorting problem. If the items in your list support operator<() and operator==(), you might be better off with Q3SortedList because it implements the compareItems() function for you using these two operators. \sa inSort() */ /*! \fn bool Q3PtrList::isEmpty() const Returns TRUE if the list is empty; otherwise returns FALSE. \sa count() */ /*! \fn bool Q3PtrList::insert( uint index, const type *item ) Inserts the \a item at position \a index in the list. Returns TRUE if successful, i.e. if \a index is in range; otherwise returns FALSE. The valid range is 0 to count() (inclusively). The item is appended if \a index == count(). The inserted item becomes the current list item. \a item must not be 0. \sa append(), current(), replace() */ /*! \fn bool Q3PtrList::replace( uint index, const type *item ) Replaces the item at position \a index with the new \a item. Returns TRUE if successful, i.e. \a index is in the range 0 to count()-1. \sa append(), current(), insert() */ /*! \fn void Q3PtrList::inSort( const type *item ) Inserts the \a item at its sorted position in the list. The sort order depends on the virtual compareItems() function. All items must be inserted with inSort() to maintain the sorting order. The inserted item becomes the current list item. \a item must not be 0. \warning Using inSort() is slow. An alternative, especially if you have lots of items, is to simply append() or insert() them and then use sort(). inSort() takes up to O(n) compares. That means inserting n items in your list will need O(n^2) compares whereas sort() only needs O(n*log n) for the same task. So use inSort() only if you already have a presorted list and want to insert just a few additional items. \sa insert(), compareItems(), current(), sort() */ /*! \fn void Q3PtrList::append( const type *item ) Inserts the \a item at the end of the list. The inserted item becomes the current list item. This is equivalent to \c{insert( count(), item )}. \a item must not be 0. \sa insert(), current(), prepend() */ /*! \fn void Q3PtrList::prepend( const type *item ) Inserts the \a item at the start of the list. The inserted item becomes the current list item. This is equivalent to \c{insert( 0, item )}. \a item must not be 0. \sa append(), insert(), current() */ /*! \fn bool Q3PtrList::remove( uint index ) Removes the item at position \a index in the list. Returns TRUE if successful, i.e. if \a index is in range; otherwise returns FALSE. The valid range is \c{0..(count() - 1)} inclusive. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. All list iterators that refer to the removed item will be set to point to the new current item. \sa take(), clear(), setAutoDelete(), current() removeRef() */ /*! \fn bool Q3PtrList::remove() \overload Removes the current list item. Returns TRUE if successful, i.e. if the current item isn't 0; otherwise returns FALSE. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the new current item. \sa take(), clear(), setAutoDelete(), current() removeRef() */ /*! \fn bool Q3PtrList::remove( const type *item ) \overload Removes the first occurrence of \a item from the list. Returns TRUE if successful, i.e. if \a item is in the list; otherwise returns FALSE. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The compareItems() function is called when searching for the item in the list. If compareItems() is not reimplemented, it is more efficient to call removeRef(). If \a item is NULL then the current item is removed from the list. The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the new current item. \sa removeRef(), take(), clear(), setAutoDelete(), compareItems(), current() */ /*! \fn bool Q3PtrList::removeRef( const type *item ) Removes the first occurrence of \a item from the list. Returns TRUE if successful, i.e. if \a item is in the list; otherwise returns FALSE. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. Equivalent to: \snippet doc/src/snippets/code/doc_src_q3ptrlist.qdoc 2 The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the new current item. \sa remove(), clear(), setAutoDelete(), current() */ /*! \fn void Q3PtrList::removeNode( Q3LNode *node ) Removes the \a node from the list. This node must exist in the list, otherwise the program may crash. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The first item in the list will become the new current list item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the item succeeding this item or to the preceding item if the removed item was the last item. \warning Do not call this function unless you are an expert. \sa takeNode(), currentNode() remove() removeRef() */ /*! \fn bool Q3PtrList::removeFirst() Removes the first item from the list. Returns TRUE if successful, i.e. if the list isn't empty; otherwise returns FALSE. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The first item in the list becomes the new current list item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the new current item. \sa removeLast(), setAutoDelete(), current() remove() */ /*! \fn bool Q3PtrList::removeLast() Removes the last item from the list. Returns TRUE if successful, i.e. if the list isn't empty; otherwise returns FALSE. The removed item is deleted if \link setAutoDelete() auto-deletion\endlink is enabled. The last item in the list becomes the new current list item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the removed item will be set to point to the new current item. \sa removeFirst(), setAutoDelete(), current() */ /*! \fn type *Q3PtrList::take( uint index ) Takes the item at position \a index out of the list without deleting it (even if \link setAutoDelete() auto-deletion\endlink is enabled). Returns a pointer to the item taken out of the list, or 0 if the index is out of range. The valid range is \c{0..(count() - 1)} inclusive. The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the taken item will be set to point to the new current item. \sa remove(), clear(), current() */ /*! \fn type *Q3PtrList::take() \overload Takes the current item out of the list without deleting it (even if \link setAutoDelete() auto-deletion\endlink is enabled). Returns a pointer to the item taken out of the list, or 0 if the current item is 0. The item after the removed item becomes the new current list item if the removed item is not the last item in the list. If the last item is removed, the new last item becomes the current item. The current item is set to 0 if the list becomes empty. All list iterators that refer to the taken item will be set to point to the new current item. \sa remove(), clear(), current() */ /*! \fn type *Q3PtrList::takeNode( Q3LNode *node ) Takes the \a node out of the list without deleting its item (even if \link setAutoDelete() auto-deletion\endlink is enabled). Returns a pointer to the item taken out of the list. This node must exist in the list, otherwise the program may crash. The first item in the list becomes the new current list item. All list iterators that refer to the taken item will be set to point to the item succeeding this item or to the preceding item if the taken item was the last item. \warning Do not call this function unless you are an expert. \sa removeNode(), currentNode() */ /*! \fn void Q3PtrList::clear() Removes all items from the list. The removed items are deleted if \link setAutoDelete() auto-deletion\endlink is enabled. All list iterators that access this list will be reset. \sa remove(), take(), setAutoDelete() */ /*! \fn int Q3PtrList::find( const type *item ) Finds the first occurrence of \a item in the list. If the item is found, the list sets the current item to point to the found item and returns the index of this item. If the item is not found, the list sets the current item to 0, the current index to -1, and returns -1. The compareItems() function is called when searching for the item in the list. If compareItems() is not reimplemented, it is more efficient to call findRef(). \sa findNext(), findRef(), compareItems(), current() */ /*! \fn int Q3PtrList::findNext( const type *item ) Finds the next occurrence of \a item in the list, starting from the current list item. If the item is found, the list sets the current item to point to the found item and returns the index of this item. If the item is not found, the list sets the current item to 0, the current index to -1, and returns -1. The compareItems() function is called when searching for the item in the list. If compareItems() is not reimplemented, it is more efficient to call findNextRef(). \sa find(), findNextRef(), compareItems(), current() */ /*! \fn int Q3PtrList::findRef( const type *item ) Finds the first occurrence of \a item in the list. If the item is found, the list sets the current item to point to the found item and returns the index of this item. If the item is not found, the list sets the current item to 0, the current index to -1, and returns -1. Calling this function is much faster than find() because find() compares \a item with each list item using compareItems(), whereas this function only compares the pointers. \sa findNextRef(), find(), current() */ /*! \fn int Q3PtrList::findNextRef( const type *item ) Finds the next occurrence of \a item in the list, starting from the current list item. If the item is found, the list sets the current item to point to the found item and returns the index of this item. If the item is not found, the list sets the current item to 0, the current index to -1, and returns -1. Calling this function is much faster than findNext() because findNext() compares \a item with each list item using compareItems(), whereas this function only compares the pointers. \sa findRef(), findNext(), current() */ /*! \fn uint Q3PtrList::contains( const type *item ) const Returns the number of occurrences of \a item in the list. The compareItems() function is called when looking for the \a item in the list. If compareItems() is not reimplemented, it is more efficient to call containsRef(). This function does not affect the current list item. \sa containsRef(), compareItems() */ /*! \fn uint Q3PtrList::containsRef( const type *item ) const Returns the number of occurrences of \a item in the list. Calling this function is much faster than contains() because contains() compares \a item with each list item using compareItems(), whereas his function only compares the pointers. This function does not affect the current list item. \sa contains() */ /*! \fn type *Q3PtrList::at( uint index ) Returns a pointer to the item at position \a index in the list, or 0 if the index is out of range. Sets the current list item to this item if \a index is valid. The valid range is \c{0..(count() - 1)} inclusive. This function is very efficient. It starts scanning from the first item, last item, or current item, whichever is closest to \a index. \sa current() */ /*! \fn int Q3PtrList::at() const \overload Returns the index of the current list item. The returned value is -1 if the current item is 0. \sa current() */ /*! \fn type *Q3PtrList::current() const Returns a pointer to the current list item. The current item may be 0 (implies that the current index is -1). \sa at() */ /*! \fn Q3LNode *Q3PtrList::currentNode() const Returns a pointer to the current list node. The node can be kept and removed later using removeNode(). The advantage is that the item can be removed directly without searching the list. \warning Do not call this function unless you are an expert. \sa removeNode(), takeNode(), current() */ /*! \fn type *Q3PtrList::getFirst() const Returns a pointer to the first item in the list, or 0 if the list is empty. This function does not affect the current list item. \sa first(), getLast() */ /*! \fn type *Q3PtrList::getLast() const Returns a pointer to the last item in the list, or 0 if the list is empty. This function does not affect the current list item. \sa last(), getFirst() */ /*! \fn type *Q3PtrList::first() Returns a pointer to the first item in the list and makes this the current list item; returns 0 if the list is empty. \sa getFirst(), last(), next(), prev(), current() */ /*! \fn type *Q3PtrList::last() Returns a pointer to the last item in the list and makes this the current list item; returns 0 if the list is empty. \sa getLast(), first(), next(), prev(), current() */ /*! \fn type *Q3PtrList::next() Returns a pointer to the item succeeding the current item. Returns 0 if the current item is 0 or equal to the last item. Makes the succeeding item current. If the current item before this function call was the last item, the current item will be set to 0. If the current item was 0, this function does nothing. \sa first(), last(), prev(), current() */ /*! \fn type *Q3PtrList::prev() Returns a pointer to the item preceding the current item. Returns 0 if the current item is 0 or equal to the first item. Makes the preceding item current. If the current item before this function call was the first item, the current item will be set to 0. If the current item was 0, this function does nothing. \sa first(), last(), next(), current() */ /*! \fn void Q3PtrList::toVector( Q3GVector *vec ) const Stores all list items in the vector \a vec. The vector must be of the same item type, otherwise the result will be undefined. */ /*! \typedef Q3PtrList::iterator \internal */ /*! \typedef Q3PtrList::Iterator \internal */ /*! \typedef Q3PtrList::ConstIterator \internal */ /*! \typedef Q3PtrList::const_iterator \internal */ /*! \fn Q3PtrList::constBegin() const \internal */ /*! \fn Q3PtrList::constEnd() const \internal */ /*! \fn Q3PtrList::erase(Iterator) \internal */ /***************************************************************************** Q3PtrListIterator documentation *****************************************************************************/ /*! \class Q3PtrListIterator \brief The Q3PtrListIterator class provides an iterator for Q3PtrList collections. \compat Define a template instance Q3PtrListIterator\ to create a list iterator that operates on Q3PtrList\ (list of X*). The following example is similar to the example in the Q3PtrList class documentation, but it uses Q3PtrListIterator. The class Employee is defined there. \snippet doc/src/snippets/code/doc_src_q3ptrlist.qdoc 3 The output is \snippet doc/src/snippets/code/doc_src_q3ptrlist.qdoc 4 Using a list iterator is a more robust way of traversing the list than using the Q3PtrList member functions \link Q3PtrList::first() first\endlink(), \link Q3PtrList::next() next\endlink(), \link Q3PtrList::current() current\endlink(), etc., as many iterators can traverse the same list independently. An iterator has its own current list item and can get the next and previous list items. It doesn't modify the list in any way. When an item is removed from the list, all iterators that point to that item are updated to point to Q3PtrList::current() instead to avoid dangling references. \sa Q3PtrList */ /*! \fn Q3PtrListIterator::Q3PtrListIterator( const Q3PtrList &list ) Constructs an iterator for \a list. The current iterator item is set to point on the first item in the \a list. */ /*! \fn Q3PtrListIterator::~Q3PtrListIterator() Destroys the iterator. */ /*! \fn uint Q3PtrListIterator::count() const Returns the number of items in the list this iterator operates on. \sa isEmpty() */ /*! \fn bool Q3PtrListIterator::isEmpty() const Returns TRUE if the list is empty; otherwise returns FALSE. \sa count() */ /*! \fn bool Q3PtrListIterator::atFirst() const Returns TRUE if the current iterator item is the first list item; otherwise returns FALSE. \sa toFirst(), atLast() */ /*! \fn bool Q3PtrListIterator::atLast() const Returns TRUE if the current iterator item is the last list item; otherwise returns FALSE. \sa toLast(), atFirst() */ /*! \fn type *Q3PtrListIterator::toFirst() Sets the current iterator item to point to the first list item and returns a pointer to the item. Sets the current item to 0 and returns 0 if the list is empty. \sa toLast(), atFirst() */ /*! \fn type *Q3PtrListIterator::toLast() Sets the current iterator item to point to the last list item and returns a pointer to the item. Sets the current item to 0 and returns 0 if the list is empty. \sa toFirst(), atLast() */ /*! \fn Q3PtrListIterator::operator type *() const Cast operator. Returns a pointer to the current iterator item. Same as current(). */ /*! \fn type *Q3PtrListIterator::operator*() Asterisk operator. Returns a pointer to the current iterator item. Same as current(). */ /*! \fn type *Q3PtrListIterator::current() const Returns a pointer to the current iterator item. If the iterator is positioned before the first item in the list or after the last item in the list, 0 is returned. */ /*! \fn type *Q3PtrListIterator::operator()() Makes the succeeding item current and returns the original current item. If the current iterator item was the last item in the list or if it was 0, 0 is returned. */ /*! \fn type *Q3PtrListIterator::operator++() Prefix ++ makes the succeeding item current and returns the new current item. If the current iterator item was the last item in the list or if it was 0, 0 is returned. */ /*! \fn type *Q3PtrListIterator::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 list is empty, it sets the current item to 0 and returns 0 */ /*! \fn type *Q3PtrListIterator::operator--() Prefix - makes the preceding item current and returns the new current item. If the current iterator item was the first item in the list or if it was 0, 0 is returned. */ /*! \fn type *Q3PtrListIterator::operator-=( uint jump ) Returns the item \a jump positions before the current item or 0 if it is beyond the first item. Makes this the current item. */ /*! \fn Q3PtrListIterator& Q3PtrListIterator::operator=( const Q3PtrListIterator &it ) Assignment. Makes a copy of the iterator \a it and returns a reference to this iterator. */ /*! \class Q3StrList \brief The Q3StrList class provides a doubly-linked list of char*. \compat If you want a string list of \l{QString}s use QStringList. This class is a Q3PtrList\ instance (a list of char*). Q3StrList can make deep or shallow copies of the strings that are inserted. A deep copy means that memory is allocated for the string and then the string data is copied into that memory. A shallow copy is just a copy of the pointer value and not of the string data itself. The disadvantage of shallow copies is that because a pointer can be deleted only once, the program must put all strings in a central place and know when it is safe to delete them (i.e. when the strings are no longer referenced by other parts of the program). This can make the program more complex. The advantage of shallow copies is that they consume far less memory than deep copies. It is also much faster to copy a pointer (typically 4 or 8 bytes) than to copy string data. A Q3StrList that operates on deep copies will, by default, turn on auto-deletion (see setAutoDelete()). Thus, by default Q3StrList will deallocate any string copies it allocates. The virtual compareItems() function is reimplemented and does a case-sensitive string comparison. The inSort() function will insert strings in sorted order. In general it is fastest to insert the strings as they come and sort() at the end; inSort() is useful when you just have to add a few extra strings to an already sorted list. The Q3StrListIterator class is an iterator for Q3StrList. */ /*! \fn Q3StrList::operator QList() const Automatically converts a Q3StrList into a QList. */ /*! \fn Q3StrList::Q3StrList( bool deepCopies ) Constructs an empty list of strings. Will make deep copies of all inserted strings if \a deepCopies is TRUE, or use shallow copies if \a deepCopies is FALSE. */ /*! \fn Q3StrList::Q3StrList(const Q3StrList &list) \fn Q3StrList::Q3StrList(const QList &list) Constructs a copy of \a list. */ /*! \fn Q3StrList::~Q3StrList() Destroys the list. All strings are removed. */ /*! \fn Q3StrList& Q3StrList::operator=(const Q3StrList& list) \fn Q3StrList &Q3StrList::operator=(const QList &list) Assigns \a list to this list and returns a reference to this list. */ /*! \class Q3StrIList \brief The Q3StrIList class provides a doubly-linked list of char* with case-insensitive comparison. \compat This class is a Q3PtrList\ instance (a list of char*). Q3StrIList is identical to Q3StrList except that the virtual compareItems() function is reimplemented to compare strings case-insensitively. The inSort() function inserts strings in a sorted order. In general it is fastest to insert the strings as they come and sort() at the end; inSort() is useful when you just have to add a few extra strings to an already sorted list. The Q3StrListIterator class works for Q3StrIList. \sa QStringList */ /*! \fn Q3StrIList::Q3StrIList( bool deepCopies ) Constructs a list of strings. Will make deep copies of all inserted strings if \a deepCopies is TRUE, or use shallow copies if \a deepCopies is FALSE. */ /*! \fn Q3StrIList::~Q3StrIList() Destroys the list. All strings are removed. */ /*! \fn int Q3PtrList::compareItems( Q3PtrCollection::Item item1, Q3PtrCollection::Item item2 ) This virtual function compares two list items. Returns: \list \i zero if \a item1 == \a item2 \i nonzero if \a item1 != \a item2 \endlist This function returns \e int rather than \e bool so that reimplementations can return three values and use it to sort by: \list \i 0 if \a item1 == \a item2 \i \> 0 (positive integer) if \a item1 \> \a item2 \i \< 0 (negative integer) if \a item1 \< \a item2 \endlist inSort() requires that compareItems() is implemented as described here. This function should not modify the list because some const functions call compareItems(). The default implementation compares the pointers. */ /*! \fn QDataStream& Q3PtrList::read( QDataStream& s, Q3PtrCollection::Item& item ) Reads a list 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& Q3PtrList::write( QDataStream& s, Q3PtrCollection::Item item ) const Writes a list item, \a item to the stream \a s and returns a reference to the stream. The default implementation does nothing. \sa read() */ /*! \fn iterator Q3PtrList::begin() \internal */ /*! \fn const_iterator Q3PtrList::begin() const \internal */ /*! \fn iterator Q3PtrList::end() \internal */ /*! \fn const_iterator Q3PtrList::end() const \internal */ /*! \class Q3StrListIterator \brief The Q3StrListIterator class is an iterator for the Q3StrList and Q3StrIList classes. \compat This class is a Q3PtrListIterator\ instance. It can traverse the strings in the Q3StrList and Q3StrIList classes. */ /* \class Q3PtrListAutoDelete \brief The Q3PtrListAutoDelete class is a template class that provides a list that auto-deletes its data. \compat A Q3PtrListAutoDelete is identical to a Q3PtrList with setAutoDelete(TRUE). */