<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <!-- /home/reggie/tmp/qt-3.1-reggie-23625/qt-x11-free-3.1.1/doc/qintcache.doc:281 --> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>QIntCacheIterator Class</title> <style type="text/css"><!-- h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm; } a:link { color: #004faf; text-decoration: none } a:visited { color: #672967; text-decoration: none } body { background: #ffffff; color: black; } --></style> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr bgcolor="#E5E5E5"> <td valign=center> <a href="index.html"> <font color="#004faf">Home</font></a> | <a href="classes.html"> <font color="#004faf">All Classes</font></a> | <a href="mainclasses.html"> <font color="#004faf">Main Classes</font></a> | <a href="annotated.html"> <font color="#004faf">Annotated</font></a> | <a href="groups.html"> <font color="#004faf">Grouped Classes</font></a> | <a href="functions.html"> <font color="#004faf">Functions</font></a> </td> <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QIntCacheIterator Class Reference</h1> <p>The QIntCacheIterator class provides an iterator for QIntCache collections. <a href="#details">More...</a> <p><tt>#include <<a href="qintcache-h.html">qintcache.h</a>></tt> <p><a href="qintcacheiterator-members.html">List of all member functions.</a> <h2>Public Members</h2> <ul> <li><div class=fn><a href="#QIntCacheIterator"><b>QIntCacheIterator</b></a> ( const QIntCache<type> & cache )</div></li> <li><div class=fn><a href="#QIntCacheIterator-2"><b>QIntCacheIterator</b></a> ( const QIntCacheIterator<type> & ci )</div></li> <li><div class=fn>QIntCacheIterator<type> & <a href="#operator-eq"><b>operator=</b></a> ( const QIntCacheIterator<type> & ci )</div></li> <li><div class=fn>uint <a href="#count"><b>count</b></a> () const</div></li> <li><div class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</div></li> <li><div class=fn>bool <a href="#atFirst"><b>atFirst</b></a> () const</div></li> <li><div class=fn>bool <a href="#atLast"><b>atLast</b></a> () const</div></li> <li><div class=fn>type * <a href="#toFirst"><b>toFirst</b></a> ()</div></li> <li><div class=fn>type * <a href="#toLast"><b>toLast</b></a> ()</div></li> <li><div class=fn><a href="#operator-type-*"><b>operator type *</b></a> () const</div></li> <li><div class=fn>type * <a href="#current"><b>current</b></a> () const</div></li> <li><div class=fn>long <a href="#currentKey"><b>currentKey</b></a> () const</div></li> <li><div class=fn>type * <a href="#operator()"><b>operator()</b></a> ()</div></li> <li><div class=fn>type * <a href="#operator++"><b>operator++</b></a> ()</div></li> <li><div class=fn>type * <a href="#operator+-eq"><b>operator+=</b></a> ( uint jump )</div></li> <li><div class=fn>type * <a href="#operator--"><b>operator--</b></a> ()</div></li> <li><div class=fn>type * <a href="#operator--eq"><b>operator-=</b></a> ( uint jump )</div></li> </ul> <hr><a name="details"></a><h2>Detailed Description</h2> The QIntCacheIterator class provides an iterator for <a href="qintcache.html">QIntCache</a> collections. <p> <p> Note that the traversal order is arbitrary; you are not guaranteed any particular order. If new objects are inserted into the cache while the iterator is active, the iterator may or may not see them. <p> Multiple iterators are completely independent, even when they operate on the same QIntCache. QIntCache updates all iterators that refer an item when that item is removed. <p> QIntCacheIterator provides an <a href="#operator++">operator++</a>(), and an <a href="#operator+-eq">operator+=</a>() to traverse the cache; <a href="#current">current</a>() and <a href="#currentKey">currentKey</a>() to access the current cache item and its key; <a href="#atFirst">atFirst</a>() <a href="#atLast">atLast</a>(), which return TRUE if the iterator points to the first/last item in the cache; <a href="#isEmpty">isEmpty</a>(), which returns TRUE if the cache is empty; and <a href="#count">count</a>(), which returns the number of items in the cache. <p> Note that atFirst() and atLast() refer to the iterator's arbitrary ordering, not to the cache's internal least recently used list. <p> <p>See also <a href="qintcache.html">QIntCache</a>, <a href="collection.html">Collection Classes</a>, and <a href="tools.html">Non-GUI Classes</a>. <hr><h2>Member Function Documentation</h2> <h3 class=fn><a name="QIntCacheIterator"></a>QIntCacheIterator::QIntCacheIterator ( const <a href="qintcache.html">QIntCache</a><type> & cache ) </h3> <p> Constructs an iterator for <em>cache</em>. The current iterator item is set to point to the first item in the <em>cache</em> (or rather, the first item is defined to be the item at which this constructor sets the iterator to point). <h3 class=fn><a name="QIntCacheIterator-2"></a>QIntCacheIterator::QIntCacheIterator ( const <a href="qintcacheiterator.html">QIntCacheIterator</a><type> & ci ) </h3> <p> Constructs an iterator for the same cache as <em>ci</em>. The new iterator starts at the same item as ci.<a href="#current">current</a>(), but moves independently from there on. <h3 class=fn>bool <a name="atFirst"></a>QIntCacheIterator::atFirst () const </h3> <p> Returns TRUE if the iterator points to the first item in the cache; otherwise returns FALSE. Note that this refers to the iterator's arbitrary ordering, not to the cache's internal least recently used list. <p> <p>See also <a href="#toFirst">toFirst</a>() and <a href="#atLast">atLast</a>(). <h3 class=fn>bool <a name="atLast"></a>QIntCacheIterator::atLast () const </h3> <p> Returns TRUE if the iterator points to the last item in the cache; otherwise returns FALSE. Note that this refers to the iterator's arbitrary ordering, not to the cache's internal least recently used list. <p> <p>See also <a href="#toLast">toLast</a>() and <a href="#atFirst">atFirst</a>(). <h3 class=fn>uint <a name="count"></a>QIntCacheIterator::count () const </h3> <p> Returns the number of items in the cache on which this iterator operates. <p> <p>See also <a href="#isEmpty">isEmpty</a>(). <h3 class=fn>type * <a name="current"></a>QIntCacheIterator::current () const </h3> <p> Returns a pointer to the current iterator item. <h3 class=fn>long <a name="currentKey"></a>QIntCacheIterator::currentKey () const </h3> <p> Returns the key for the current iterator item. <h3 class=fn>bool <a name="isEmpty"></a>QIntCacheIterator::isEmpty () const </h3> <p> Returns TRUE if the cache is empty; otherwise returns FALSE. <p> <p>See also <a href="#count">count</a>(). <h3 class=fn><a name="operator-type-*"></a>QIntCacheIterator::operator type * () const </h3> <p> Cast operator. Returns a pointer to the current iterator item. Same as <a href="#current">current</a>(). <h3 class=fn>type * <a name="operator()"></a>QIntCacheIterator::operator() () </h3> <p> Makes the succeeding item current and returns the original current item. <p> If the current iterator item was the last item in the cache or if it was 0, 0 is returned. <h3 class=fn>type * <a name="operator++"></a>QIntCacheIterator::operator++ () </h3> <p> Prefix ++ makes the iterator point to the item just after <a href="#current">current</a>(), and makes it the new current item for the iterator. If current() was the last item, <a href="#operator--">operator--</a>() returns 0. <h3 class=fn>type * <a name="operator+-eq"></a>QIntCacheIterator::operator+= ( uint jump ) </h3> <p> Returns the item <em>jump</em> positions after the current item, or 0 if it is beyond the last item. Makes this the current item. <h3 class=fn>type * <a name="operator--"></a>QIntCacheIterator::operator-- () </h3> <p> Prefix -- makes the iterator point to the item just before <a href="#current">current</a>(), and makes it the new current item for the iterator. If current() was the first item, <a href="#operator--">operator--</a>() returns 0. <h3 class=fn>type * <a name="operator--eq"></a>QIntCacheIterator::operator-= ( uint jump ) </h3> <p> Returns the item <em>jump</em> positions before the current item, or 0 if it is beyond the first item. Makes this the current item. <h3 class=fn><a href="qintcacheiterator.html">QIntCacheIterator</a><type> & <a name="operator-eq"></a>QIntCacheIterator::operator= ( const <a href="qintcacheiterator.html">QIntCacheIterator</a><type> & ci ) </h3> <p> Makes this an iterator for the same cache as <em>ci</em>. The new iterator starts at the same item as ci.<a href="#current">current</a>(), but moves independently thereafter. <h3 class=fn>type * <a name="toFirst"></a>QIntCacheIterator::toFirst () </h3> <p> Sets the iterator to point to the first item in the cache and returns a pointer to the item. <p> Sets the iterator to 0, and returns 0, if the cache is empty. <p> <p>See also <a href="#toLast">toLast</a>() and <a href="#isEmpty">isEmpty</a>(). <h3 class=fn>type * <a name="toLast"></a>QIntCacheIterator::toLast () </h3> <p> Sets the iterator to point to the last item in the cache and returns a pointer to the item. <p> Sets the iterator to 0, and returns 0, if the cache is empty. <p> <p>See also <a href="#toFirst">toFirst</a>() and <a href="#isEmpty">isEmpty</a>(). <!-- eof --> <hr><p> This file is part of the <a href="index.html">Qt toolkit</a>. Copyright © 1995-2002 <a href="http://www.trolltech.com/">Trolltech</a>. 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