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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li>Qt3SupportLight</li> <li>Q3DictIterator</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> </ul> </div> <h1 class="title">Q3DictIterator Class Reference</h1> <!-- $$$Q3DictIterator-brief --> <p>The Q3DictIterator class provides an iterator for <a href="q3dict.html">Q3Dict</a> collections. <a href="#details">More...</a></p> <!-- @@@Q3DictIterator --> <pre class="cpp"> <span class="preprocessor">#include <Q3DictIterator></span></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html">Porting to Qt 4</a> for more information.</p> <ul> <li><a href="q3dictiterator-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#Q3DictIterator">Q3DictIterator</a></b> ( const Q3Dict<type> & <i>dict</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#dtor.Q3DictIterator">~Q3DictIterator</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> uint </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#count">count</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#current">current</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#currentKey">currentKey</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#isEmpty">isEmpty</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#toFirst">toFirst</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#operator-type--2a">operator type *</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#operator-28-29">operator()</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3dictiterator.html#operator-2b-2b">operator++</a></b> ()</td></tr> </table> <a name="details"></a> <!-- $$$Q3DictIterator-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The Q3DictIterator class provides an iterator for <a href="q3dict.html">Q3Dict</a> collections.</p> <p>Q3DictIterator is implemented as a template class. Define a template instance Q3DictIterator<X> to create a dictionary iterator that operates on <a href="q3dict.html">Q3Dict</a><X> (dictionary of X*).</p> <p>The traversal order is arbitrary; when we speak of the "first", "last" and "next" item we are talking in terms of this arbitrary order.</p> <p>Multiple iterators may independently traverse the same dictionary. A <a href="q3dict.html">Q3Dict</a> knows about all the iterators that are operating on the dictionary. When an item is removed from the dictionary, <a href="q3dict.html">Q3Dict</a> updates all iterators that are referring to the removed item to point to the next item in the (arbitrary) traversal order.</p> <p>Example:</p> <pre class="cpp"> <span class="type"><a href="q3dict.html">Q3Dict</a></span><span class="operator"><</span><span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">></span> fields; fields<span class="operator">.</span>insert( <span class="string">"forename"</span><span class="operator">,</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> ) ); fields<span class="operator">.</span>insert( <span class="string">"surname"</span><span class="operator">,</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> ) ); fields<span class="operator">.</span>insert( <span class="string">"age"</span><span class="operator">,</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> ) ); fields<span class="operator">[</span><span class="string">"forename"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText( <span class="string">"Homer"</span> ); fields<span class="operator">[</span><span class="string">"surname"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText( <span class="string">"Simpson"</span> ); fields<span class="operator">[</span><span class="string">"age"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText( <span class="string">"45"</span> ); <span class="type">Q3DictIterator</span><span class="operator"><</span><span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">></span> it( fields ); <span class="keyword">for</span>( ; it<span class="operator">.</span>current(); <span class="operator">+</span><span class="operator">+</span>it ) cout <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span><a href="q3dictiterator.html#currentKey">currentKey</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">": "</span> <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span><a href="q3dictiterator.html#current">current</a>()<span class="operator">-</span><span class="operator">></span>text() <span class="operator"><</span><span class="operator"><</span> endl; cout <span class="operator"><</span><span class="operator"><</span> endl; <span class="comment">// Output (random order):</span> <span class="comment">// age: 45</span> <span class="comment">// surname: Simpson</span> <span class="comment">// forename: Homer</span></pre> <p>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.</p> </div> <p><b>See also </b><a href="q3dict.html">Q3Dict</a>.</p> <!-- @@@Q3DictIterator --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$Q3DictIterator[overload1]$$$Q3DictIteratorconstQ3Dict<type>& --> <h3 class="fn"><a name="Q3DictIterator"></a>Q3DictIterator::<span class="name">Q3DictIterator</span> ( const <span class="type"><a href="q3dict.html">Q3Dict</a></span><<span class="type">type</span>> & <i>dict</i> )</h3> <p>Constructs an iterator for <i>dict</i>. The current iterator item is set to point to the first item in the dictionary, <i>dict</i>. First in this context means first in the arbitrary traversal order.</p> <!-- @@@Q3DictIterator --> <!-- $$$~Q3DictIterator[overload1]$$$~Q3DictIterator --> <h3 class="fn"><a name="dtor.Q3DictIterator"></a>Q3DictIterator::<span class="name">~Q3DictIterator</span> ()</h3> <p>Destroys the iterator.</p> <!-- @@@~Q3DictIterator --> <!-- $$$count[overload1]$$$count --> <h3 class="fn"><a name="count"></a><span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> Q3DictIterator::<span class="name">count</span> () const</h3> <p>Returns the number of items in the dictionary over which the iterator is operating.</p> <p><b>See also </b><a href="q3dictiterator.html#isEmpty">isEmpty</a>().</p> <!-- @@@count --> <!-- $$$current[overload1]$$$current --> <h3 class="fn"><a name="current"></a><span class="type">type</span> * Q3DictIterator::<span class="name">current</span> () const</h3> <p>Returns a pointer to the current iterator item's value.</p> <!-- @@@current --> <!-- $$$currentKey[overload1]$$$currentKey --> <h3 class="fn"><a name="currentKey"></a><span class="type"><a href="qstring.html">QString</a></span> Q3DictIterator::<span class="name">currentKey</span> () const</h3> <p>Returns the current iterator item's key.</p> <!-- @@@currentKey --> <!-- $$$isEmpty[overload1]$$$isEmpty --> <h3 class="fn"><a name="isEmpty"></a><span class="type">bool</span> Q3DictIterator::<span class="name">isEmpty</span> () const</h3> <p>Returns TRUE if the dictionary is empty, i.e. <a href="q3dictiterator.html#count">count</a>() == 0; otherwise returns FALSE.</p> <p><b>See also </b><a href="q3dictiterator.html#count">count</a>().</p> <!-- @@@isEmpty --> <!-- $$$toFirst[overload1]$$$toFirst --> <h3 class="fn"><a name="toFirst"></a><span class="type">type</span> * Q3DictIterator::<span class="name">toFirst</span> ()</h3> <p>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.</p> <p>If the dictionary is empty it sets the current item to 0 and returns 0.</p> <!-- @@@toFirst --> <!-- $$$operator type *[overload1]$$$operator type * --> <h3 class="fn"><a name="operator-type--2a"></a>Q3DictIterator::<span class="name">operator type *</span> () const</h3> <p>Cast operator. Returns a pointer to the current iterator item. Same as <a href="q3dictiterator.html#current">current</a>().</p> <!-- @@@operator type * --> <!-- $$$operator()[overload1]$$$operator() --> <h3 class="fn"><a name="operator-28-29"></a><span class="type">type</span> * Q3DictIterator::<span class="name">operator()</span> ()</h3> <p>Makes the next item current and returns the original current item.</p> <p>If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.</p> <!-- @@@operator() --> <!-- $$$operator++[overload1]$$$operator++ --> <h3 class="fn"><a name="operator-2b-2b"></a><span class="type">type</span> * Q3DictIterator::<span class="name">operator++</span> ()</h3> <p>Prefix ++ makes the next item current and returns the new current item.</p> <p>If the current iterator item was the last item in the dictionary or if it was 0, 0 is returned.</p> <!-- @@@operator++ --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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