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+<title>QPtrListIterator Class</title>
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+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QPtrListIterator Class Reference</h1>
+
+<p>The QPtrListIterator class provides an iterator for
+QPtrList collections.
+<a href="#details">More...</a>
+<p><tt>#include &lt;<a href="qptrlist-h.html">qptrlist.h</a>&gt;</tt>
+<p>Inherited by <a href="qobjectlistiterator.html">QObjectListIterator</a> and <a href="qstrlistiterator.html">QStrListIterator</a>.
+<p><a href="qptrlistiterator-members.html">List of all member functions.</a>
+<h2>Public Members</h2>
+<ul>
+<li class=fn><a href="#QPtrListIterator"><b>QPtrListIterator</b></a> ( const&nbsp;QPtrList&lt;type&gt;&nbsp;&amp;&nbsp;list )</li>
+<li class=fn><a href="#~QPtrListIterator"><b>~QPtrListIterator</b></a> ()</li>
+<li class=fn>uint <a href="#count"><b>count</b></a> () const</li>
+<li class=fn>bool <a href="#isEmpty"><b>isEmpty</b></a> () const</li>
+<li class=fn>bool <a href="#atFirst"><b>atFirst</b></a> () const</li>
+<li class=fn>bool <a href="#atLast"><b>atLast</b></a> () const</li>
+<li class=fn>type * <a href="#toFirst"><b>toFirst</b></a> ()</li>
+<li class=fn>type * <a href="#toLast"><b>toLast</b></a> ()</li>
+<li class=fn><a href="#operator-type-*"><b>operator type *</b></a> () const</li>
+<li class=fn>type * <a href="#operator*"><b>operator*</b></a> ()</li>
+<li class=fn>type * <a href="#current"><b>current</b></a> () const</li>
+<li class=fn>type * <a href="#operator()"><b>operator()</b></a> ()</li>
+<li class=fn>type * <a href="#operator++"><b>operator++</b></a> ()</li>
+<li class=fn>type * <a href="#operator+-eq"><b>operator+=</b></a> ( uint&nbsp;jump )</li>
+<li class=fn>type * <a href="#operator--"><b>operator--</b></a> ()</li>
+<li class=fn>type * <a href="#operator--eq"><b>operator-=</b></a> ( uint&nbsp;jump )</li>
+<li class=fn>QPtrListIterator&lt;type&gt; &amp; <a href="#operator-eq"><b>operator=</b></a> ( const&nbsp;QPtrListIterator&lt;type&gt;&nbsp;&amp;&nbsp;it )</li>
+</ul>
+<hr><a name="details"></a><h2>Detailed Description</h2>
+
+
+The QPtrListIterator class provides an iterator for
+<a href="qptrlist.html">QPtrList</a> collections.
+<p>
+
+<p> Define a template instance QPtrListIterator&lt;X&gt; to create a list
+iterator that operates on QPtrList&lt;X&gt; (list of X*).
+<p> The following example is similar to the <a href="qptrlist.html#example">example in the QPtrList class documentation</a>, but it uses QPtrListIterator. The class Employee is
+defined there.
+<p> <pre>
+ <a href="qptrlist.html">QPtrList</a>&lt;Employee&gt; list;
+
+ list.<a href="qptrlist.html#append">append</a>( new Employee("John", "Doe", 50000) );
+ list.<a href="qptrlist.html#append">append</a>( new Employee("Jane", "Williams", 80000) );
+ list.<a href="qptrlist.html#append">append</a>( new Employee("Tom", "Jones", 60000) );
+
+ QPtrListIterator&lt;Employee&gt; it( list );
+ Employee *employee;
+ while ( (employee = it.<a href="#current">current</a>()) != 0 ) {
+ ++it;
+ cout &lt;&lt; employee-&gt;surname().latin1() &lt;&lt; ", " &lt;&lt;
+ employee-&gt;forename().latin1() &lt;&lt; " earns " &lt;&lt;
+ employee-&gt;salary() &lt;&lt; endl;
+ }
+ </pre>
+
+<p> The output is
+<pre>
+ Doe, John earns 50000
+ Williams, Jane earns 80000
+ Jones, Tom earns 60000
+ </pre>
+
+<p> Using a list iterator is a more robust way of traversing the list
+than using the <a href="qptrlist.html">QPtrList</a> member functions <a href="qptrlist.html#first">first</a>(), <a href="qptrlist.html#next">next</a>(), <a href="qptrlist.html#current">current</a>(), etc., as many iterators can
+traverse the same list independently.
+<p> 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.
+<p> When an item is removed from the list, all iterators that point to
+that item are updated to point to <a href="qptrlist.html#current">QPtrList::current</a>() instead to
+avoid dangling references.
+<p> <p>See also <a href="qptrlist.html">QPtrList</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="QPtrListIterator"></a>QPtrListIterator::QPtrListIterator ( const&nbsp;<a href="qptrlist.html">QPtrList</a>&lt;type&gt;&nbsp;&amp;&nbsp;list )
+</h3>
+
+<p> Constructs an iterator for <em>list</em>. The current iterator item is
+set to point on the first item in the <em>list</em>.
+
+<h3 class=fn><a name="~QPtrListIterator"></a>QPtrListIterator::~QPtrListIterator ()
+</h3>
+
+<p> Destroys the iterator.
+
+<h3 class=fn>bool <a name="atFirst"></a>QPtrListIterator::atFirst () const
+</h3>
+
+<p> Returns TRUE if the current iterator item is the first list item;
+otherwise returns FALSE.
+<p> <p>See also <a href="#toFirst">toFirst</a>() and <a href="#atLast">atLast</a>().
+
+<h3 class=fn>bool <a name="atLast"></a>QPtrListIterator::atLast () const
+</h3>
+
+<p> Returns TRUE if the current iterator item is the last list item;
+otherwise returns FALSE.
+<p> <p>See also <a href="#toLast">toLast</a>() and <a href="#atFirst">atFirst</a>().
+
+<h3 class=fn>uint <a name="count"></a>QPtrListIterator::count () const
+</h3>
+
+<p> Returns the number of items in the list this iterator operates on.
+<p> <p>See also <a href="#isEmpty">isEmpty</a>().
+
+<p>Example: <a href="customlayout-example.html#x1522">customlayout/card.cpp</a>.
+<h3 class=fn>type * <a name="current"></a>QPtrListIterator::current () const
+</h3>
+
+<p> 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.
+
+<p>Examples: <a href="canvas-example.html#x2949">canvas/canvas.cpp</a>, <a href="customlayout-example.html#x1523">customlayout/card.cpp</a>, and <a href="customlayout-example.html#x1481">customlayout/flow.cpp</a>.
+<h3 class=fn>bool <a name="isEmpty"></a>QPtrListIterator::isEmpty () const
+</h3>
+
+<p> Returns TRUE if the list is empty; otherwise returns FALSE.
+<p> <p>See also <a href="#count">count</a>().
+
+<h3 class=fn><a name="operator-type-*"></a>QPtrListIterator::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>QPtrListIterator::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 list or if
+it was 0, 0 is returned.
+
+<h3 class=fn>type * <a name="operator*"></a>QPtrListIterator::operator* ()
+</h3>
+
+<p> Asterisk operator. Returns a pointer to the current iterator item.
+Same as <a href="#current">current</a>().
+
+<h3 class=fn>type * <a name="operator++"></a>QPtrListIterator::operator++ ()
+</h3>
+
+<p> Prefix ++ makes the succeeding item current and returns the new
+current item.
+<p> If the current iterator item was the last item in the list or if
+it was 0, 0 is returned.
+
+<h3 class=fn>type * <a name="operator+-eq"></a>QPtrListIterator::operator+= ( uint&nbsp;jump )
+</h3>
+
+<p> Sets the current item to the item <em>jump</em> positions after the
+current item and returns a pointer to that item.
+<p> If that item is beyond the last item or if the list is empty, it
+sets the current item to 0 and returns 0
+
+<h3 class=fn>type * <a name="operator--"></a>QPtrListIterator::operator-- ()
+</h3>
+
+<p> Prefix - makes the preceding item current and returns the new
+current item.
+<p> If the current iterator item was the first item in the list or if
+it was 0, 0 is returned.
+
+<h3 class=fn>type * <a name="operator--eq"></a>QPtrListIterator::operator-= ( uint&nbsp;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="qptrlistiterator.html">QPtrListIterator</a>&lt;type&gt;&nbsp;&amp; <a name="operator-eq"></a>QPtrListIterator::operator= ( const&nbsp;<a href="qptrlistiterator.html">QPtrListIterator</a>&lt;type&gt;&nbsp;&amp;&nbsp;it )
+</h3>
+
+<p> Assignment. Makes a copy of the iterator <em>it</em> and returns a
+reference to this iterator.
+
+<h3 class=fn>type * <a name="toFirst"></a>QPtrListIterator::toFirst ()
+</h3>
+
+<p> 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.
+<p> <p>See also <a href="#toLast">toLast</a>() and <a href="#atFirst">atFirst</a>().
+
+<h3 class=fn>type * <a name="toLast"></a>QPtrListIterator::toLast ()
+</h3>
+
+<p> 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.
+<p> <p>See also <a href="#toFirst">toFirst</a>() and <a href="#atLast">atLast</a>().
+
+<!-- eof -->
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