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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtxmlpatterns.html">QtXmlPatterns</a></li> <li>QXmlItem</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-types">Public Types</a></li> <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">QXmlItem Class Reference</h1> <!-- $$$QXmlItem-brief --> <p>The QXmlItem class contains either an XML node or an atomic value. <a href="#details">More...</a></p> <!-- @@@QXmlItem --> <pre class="cpp"> <span class="preprocessor">#include <QXmlItem></span></pre><p><b>Note:</b> All functions in this class are <a href="threads-reentrancy.html#reentrant">reentrant</a>.</p> <p>This class was introduced in Qt 4.4.</p> <ul> <li><a href="qxmlitem-members.html">List of all members, including inherited members</a></li> </ul> <a name="public-types"></a> <h2>Public Types</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> typedef </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#Iterator-typedef">Iterator</a></b></td></tr> </table> <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="qxmlitem.html#QXmlItem">QXmlItem</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#QXmlItem-2">QXmlItem</a></b> ( const QXmlItem & <i>other</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#QXmlItem-3">QXmlItem</a></b> ( const QXmlNodeModelIndex & <i>node</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#QXmlItem-4">QXmlItem</a></b> ( const QVariant & <i>atomicValue</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#dtor.QXmlItem">~QXmlItem</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#isAtomicValue">isAtomicValue</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#isNode">isNode</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#isNull">isNull</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#toAtomicValue">toAtomicValue</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QXmlNodeModelIndex </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#toNodeModelIndex">toNodeModelIndex</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QXmlItem & </td><td class="memItemRight bottomAlign"><b><a href="qxmlitem.html#operator-eq">operator=</a></b> ( const QXmlItem & <i>other</i> )</td></tr> </table> <a name="details"></a> <!-- $$$QXmlItem-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QXmlItem class contains either an XML node or an atomic value.</p> <p>In <a href="xmlprocessing.html">XQuery</a>, all expressions evaluate to a sequence of items, where each item is either an XML node or an atomic value. The query in the following snippet evaluates to sequence of five items.</p> <pre class="cpp"> <aNode/>, xs:base64Binary("FFFF"), current-date(), 3e3, (: A floating point value :) attribute {"name"} {()}</pre> <p>The five items are: An element, an atomic value (binary data encoded in base64), a date, a float, and an attribute.</p> <p>QXmlItem is the class that represents these <a href="xmlprocessing.html">XQuery</a> items in the <a href="qtxmlpatterns.html">QtXmlPatterns</a> API. A non-null instance of QXmlItem is either a node or an atomic value. Calling <a href="qxmlitem.html#isNode">isNode</a>() or <a href="qxmlitem.html#isAtomicValue">isAtomicValue</a>() tells you which it is. Atomic values are represented elsewhere in the Qt API as instances of <a href="qvariant.html">QVariant</a>, and an instance of QXmlItem that represents an atomic value can be converted to a <a href="qvariant.html">QVariant</a> by calling <a href="qxmlitem.html#toAtomicValue">toAtomicValue</a>(). A QXmlItem that wraps a node is represented elsewhere as an instance of <a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a>. A node QXmlItem can be converted to a <a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a> by calling <a href="qxmlitem.html#toNodeModelIndex">toNodeModelIndex</a>().</p> <p>A default constructed QXmlItem instance is neither a node nor an atomic value. It is considered null, in which case <a href="qxmlitem.html#isNull">isNull</a>() returns true.</p> <p>An instance of QXmlItem will be left dangling if the <a href="qabstractxmlnodemodel.html">XML node model</a> it refers to is deleted, if it is a <a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a>.</p> </div> <!-- @@@QXmlItem --> <div class="types"> <h2>Member Type Documentation</h2> <!-- $$$Iterator --> <h3 class="fn"><a name="Iterator-typedef"></a>typedef QXmlItem::<span class="name">Iterator</span></h3> <p>A QAbstractXmlForwardIterator over <a href="qxmlitem.html">QXmlItem</a>.</p> <!-- @@@Iterator --> </div> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QXmlItem[overload1]$$$QXmlItem --> <h3 class="fn"><a name="QXmlItem"></a>QXmlItem::<span class="name">QXmlItem</span> ()</h3> <p>Constructs a null <a href="qxmlitem.html">QXmlItem</a> that is neither a node nor an atomic value. <a href="qxmlitem.html#isNull">isNull</a>() returns true for a default constructed instance.</p> <!-- @@@QXmlItem --> <!-- $$$QXmlItem$$$QXmlItemconstQXmlItem& --> <h3 class="fn"><a name="QXmlItem-2"></a>QXmlItem::<span class="name">QXmlItem</span> ( const <span class="type">QXmlItem</span> & <i>other</i> )</h3> <p>The copy constructor constructs a copy of <i>other</i>.</p> <!-- @@@QXmlItem --> <!-- $$$QXmlItem$$$QXmlItemconstQXmlNodeModelIndex& --> <h3 class="fn"><a name="QXmlItem-3"></a>QXmlItem::<span class="name">QXmlItem</span> ( const <span class="type"><a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a></span> & <i>node</i> )</h3> <p>Constructs a node <a href="qxmlitem.html">QXmlItem</a> that is a copy of <i>node</i>.</p> <p><b>See also </b><a href="qxmlitem.html#isNode">isNode</a>().</p> <!-- @@@QXmlItem --> <!-- $$$QXmlItem$$$QXmlItemconstQVariant& --> <h3 class="fn"><a name="QXmlItem-4"></a>QXmlItem::<span class="name">QXmlItem</span> ( const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>atomicValue</i> )</h3> <p>Constructs an atomic value <a href="qxmlitem.html">QXmlItem</a> with <i>atomicValue</i>.</p> <p><b>See also </b><a href="qxmlitem.html#isAtomicValue">isAtomicValue</a>().</p> <!-- @@@QXmlItem --> <!-- $$$~QXmlItem[overload1]$$$~QXmlItem --> <h3 class="fn"><a name="dtor.QXmlItem"></a>QXmlItem::<span class="name">~QXmlItem</span> ()</h3> <p>Destructor.</p> <!-- @@@~QXmlItem --> <!-- $$$isAtomicValue[overload1]$$$isAtomicValue --> <h3 class="fn"><a name="isAtomicValue"></a><span class="type">bool</span> QXmlItem::<span class="name">isAtomicValue</span> () const</h3> <p>Returns true if this item is an atomic value. Returns false if it is a node or null.</p> <p><b>See also </b><a href="qxmlitem.html#isNull">isNull</a>() and <a href="qxmlitem.html#isNode">isNode</a>().</p> <!-- @@@isAtomicValue --> <!-- $$$isNode[overload1]$$$isNode --> <h3 class="fn"><a name="isNode"></a><span class="type">bool</span> QXmlItem::<span class="name">isNode</span> () const</h3> <p>Returns true if this item is a Node. Returns false if it is an atomic value or null.</p> <p><b>See also </b><a href="qxmlitem.html#isNull">isNull</a>() and <a href="qxmlitem.html#isAtomicValue">isAtomicValue</a>().</p> <!-- @@@isNode --> <!-- $$$isNull[overload1]$$$isNull --> <h3 class="fn"><a name="isNull"></a><span class="type">bool</span> QXmlItem::<span class="name">isNull</span> () const</h3> <p>Returns true if this <a href="qxmlitem.html">QXmlItem</a> is neither a node nor an atomic value. Default constructed instances of <a href="qxmlitem.html">QXmlItem</a> are null.</p> <!-- @@@isNull --> <!-- $$$toAtomicValue[overload1]$$$toAtomicValue --> <h3 class="fn"><a name="toAtomicValue"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QXmlItem::<span class="name">toAtomicValue</span> () const</h3> <p>If this <a href="qxmlitem.html">QXmlItem</a> represents an atomic value, it is converted to an appropriate <a href="qvariant.html">QVariant</a> and returned. If this <a href="qxmlitem.html">QXmlItem</a> is not an atomic value, the return value is a default constructed <a href="qvariant.html">QVariant</a>. You can call <a href="qxmlitem.html#isAtomicValue">isAtomicValue</a>() to test whether the item is an atomic value.</p> <p><b>See also </b><a href="qxmlitem.html#isAtomicValue">isAtomicValue</a>().</p> <!-- @@@toAtomicValue --> <!-- $$$toNodeModelIndex[overload1]$$$toNodeModelIndex --> <h3 class="fn"><a name="toNodeModelIndex"></a><span class="type"><a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a></span> QXmlItem::<span class="name">toNodeModelIndex</span> () const</h3> <p>If this <a href="qxmlitem.html">QXmlItem</a> represents a node, it returns the item as a <a href="qxmlnodemodelindex.html">QXmlNodeModelIndex</a>. If this <a href="qxmlitem.html">QXmlItem</a> is not a node, the return value is undefined. You can call <a href="qxmlitem.html#isNode">isNode</a>() to test whether the item is a node.</p> <p><b>See also </b><a href="qxmlitem.html#isNode">isNode</a>().</p> <!-- @@@toNodeModelIndex --> <!-- $$$operator=[overload1]$$$operator=constQXmlItem& --> <h3 class="fn"><a name="operator-eq"></a><span class="type">QXmlItem</span> & QXmlItem::<span class="name">operator=</span> ( const <span class="type">QXmlItem</span> & <i>other</i> )</h3> <p>Assigns <i>other</i> to <tt>this</tt>.</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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