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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtscript.html">QtScript</a></li> <li>QScriptValueIterator</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">QScriptValueIterator Class Reference</h1> <!-- $$$QScriptValueIterator-brief --> <p>The QScriptValueIterator class provides a Java-style iterator for <a href="qscriptvalue.html">QScriptValue</a>. <a href="#details">More...</a></p> <!-- @@@QScriptValueIterator --> <pre class="cpp"> <span class="preprocessor">#include <QScriptValueIterator></span></pre><p>This class was introduced in Qt 4.3.</p> <ul> <li><a href="qscriptvalueiterator-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="qscriptvalueiterator.html#QScriptValueIterator">QScriptValueIterator</a></b> ( const QScriptValue & <i>object</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#dtor.QScriptValueIterator">~QScriptValueIterator</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QScriptValue::PropertyFlags </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#flags">flags</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#hasNext">hasNext</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#name">name</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#next">next</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#previous">previous</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#remove">remove</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QScriptString </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#scriptName">scriptName</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#setValue">setValue</a></b> ( const QScriptValue & <i>value</i> )</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#toBack">toBack</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#toFront">toFront</a></b> ()</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QScriptValue </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#value">value</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QScriptValueIterator & </td><td class="memItemRight bottomAlign"><b><a href="qscriptvalueiterator.html#operator-eq">operator=</a></b> ( QScriptValue & <i>object</i> )</td></tr> </table> <a name="details"></a> <!-- $$$QScriptValueIterator-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QScriptValueIterator class provides a Java-style iterator for <a href="qscriptvalue.html">QScriptValue</a>.</p> <p>The QScriptValueIterator constructor takes a <a href="qscriptvalue.html">QScriptValue</a> as argument. After construction, the iterator is located at the very beginning of the sequence of properties. Here's how to iterate over all the properties of a <a href="qscriptvalue.html">QScriptValue</a>:</p> <pre class="cpp"> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> object; <span class="operator">.</span><span class="operator">.</span><span class="operator">.</span> <span class="type">QScriptValueIterator</span> it(object); <span class="keyword">while</span> (it<span class="operator">.</span>hasNext()) { it<span class="operator">.</span>next(); <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span>name() <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>value()<span class="operator">.</span>toString(); }</pre> <p>The <a href="qscriptvalueiterator.html#next">next</a>() advances the iterator. The <a href="qscriptvalueiterator.html#name">name</a>(), <a href="qscriptvalueiterator.html#value">value</a>() and <a href="qscriptvalueiterator.html#flags">flags</a>() functions return the name, value and flags of the last item that was jumped over.</p> <p>If you want to remove properties as you iterate over the <a href="qscriptvalue.html">QScriptValue</a>, use <a href="qscriptvalueiterator.html#remove">remove</a>(). If you want to modify the value of a property, use <a href="qscriptvalueiterator.html#setValue">setValue</a>().</p> <p>Note that QScriptValueIterator only iterates over the <a href="qscriptvalue.html">QScriptValue</a>'s own properties; i.e. it does not follow the prototype chain. You can use a loop like this to follow the prototype chain:</p> <pre class="cpp"> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> obj <span class="operator">=</span> <span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>; <span class="comment">// the object to iterate over</span> <span class="keyword">while</span> (obj<span class="operator">.</span>isObject()) { <span class="type">QScriptValueIterator</span> it(obj); <span class="keyword">while</span> (it<span class="operator">.</span>hasNext()) { it<span class="operator">.</span>next(); <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span>name(); } obj <span class="operator">=</span> obj<span class="operator">.</span>prototype(); }</pre> <p>Note that QScriptValueIterator will not automatically skip over properties that have the <a href="qscriptvalue.html#PropertyFlag-enum">QScriptValue::SkipInEnumeration</a> flag set; that flag only affects iteration in script code. If you want, you can skip over such properties with code like the following:</p> <pre class="cpp"> <span class="keyword">while</span> (it<span class="operator">.</span>hasNext()) { it<span class="operator">.</span>next(); <span class="keyword">if</span> (it<span class="operator">.</span>flags() <span class="operator">&</span> <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span><span class="operator">::</span>SkipInEnumeration) <span class="keyword">continue</span>; <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"found enumerated property:"</span> <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span>name(); }</pre> </div> <p><b>See also </b><a href="qscriptvalue.html#property">QScriptValue::property</a>().</p> <!-- @@@QScriptValueIterator --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$QScriptValueIterator[overload1]$$$QScriptValueIteratorconstQScriptValue& --> <h3 class="fn"><a name="QScriptValueIterator"></a>QScriptValueIterator::<span class="name">QScriptValueIterator</span> ( const <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> & <i>object</i> )</h3> <p>Constructs an iterator for traversing <i>object</i>. The iterator is set to be at the front of the sequence of properties (before the first property).</p> <!-- @@@QScriptValueIterator --> <!-- $$$~QScriptValueIterator[overload1]$$$~QScriptValueIterator --> <h3 class="fn"><a name="dtor.QScriptValueIterator"></a>QScriptValueIterator::<span class="name">~QScriptValueIterator</span> ()</h3> <p>Destroys the iterator.</p> <!-- @@@~QScriptValueIterator --> <!-- $$$flags[overload1]$$$flags --> <h3 class="fn"><a name="flags"></a><span class="type"><a href="qscriptvalue.html#PropertyFlag-enum">QScriptValue::PropertyFlags</a></span> QScriptValueIterator::<span class="name">flags</span> () const</h3> <p>Returns the flags of the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p><b>See also </b><a href="qscriptvalueiterator.html#value">value</a>().</p> <!-- @@@flags --> <!-- $$$hasNext[overload1]$$$hasNext --> <h3 class="fn"><a name="hasNext"></a><span class="type">bool</span> QScriptValueIterator::<span class="name">hasNext</span> () const</h3> <p>Returns true if there is at least one item ahead of the iterator (i.e. the iterator is <i>not</i> at the back of the property sequence); otherwise returns false.</p> <p><b>See also </b><a href="qscriptvalueiterator.html#next">next</a>() and <a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a>().</p> <!-- @@@hasNext --> <!-- $$$hasPrevious[overload1]$$$hasPrevious --> <h3 class="fn"><a name="hasPrevious"></a><span class="type">bool</span> QScriptValueIterator::<span class="name">hasPrevious</span> () const</h3> <p>Returns true if there is at least one item behind the iterator (i.e. the iterator is <i>not</i> at the front of the property sequence); otherwise returns false.</p> <p><b>See also </b><a href="qscriptvalueiterator.html#previous">previous</a>() and <a href="qscriptvalueiterator.html#hasNext">hasNext</a>().</p> <!-- @@@hasPrevious --> <!-- $$$name[overload1]$$$name --> <h3 class="fn"><a name="name"></a><span class="type"><a href="qstring.html">QString</a></span> QScriptValueIterator::<span class="name">name</span> () const</h3> <p>Returns the name of the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p><b>See also </b><a href="qscriptvalueiterator.html#value">value</a>() and <a href="qscriptvalueiterator.html#flags">flags</a>().</p> <!-- @@@name --> <!-- $$$next[overload1]$$$next --> <h3 class="fn"><a name="next"></a><span class="type">void</span> QScriptValueIterator::<span class="name">next</span> ()</h3> <p>Advances the iterator by one position.</p> <p>Calling this function on an iterator located at the back of the container leads to undefined results.</p> <p><b>See also </b><a href="qscriptvalueiterator.html#hasNext">hasNext</a>(), <a href="qscriptvalueiterator.html#previous">previous</a>(), and <a href="qscriptvalueiterator.html#name">name</a>().</p> <!-- @@@next --> <!-- $$$previous[overload1]$$$previous --> <h3 class="fn"><a name="previous"></a><span class="type">void</span> QScriptValueIterator::<span class="name">previous</span> ()</h3> <p>Moves the iterator back by one position.</p> <p>Calling this function on an iterator located at the front of the container leads to undefined results.</p> <p><b>See also </b><a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a>(), <a href="qscriptvalueiterator.html#next">next</a>(), and <a href="qscriptvalueiterator.html#name">name</a>().</p> <!-- @@@previous --> <!-- $$$remove[overload1]$$$remove --> <h3 class="fn"><a name="remove"></a><span class="type">void</span> QScriptValueIterator::<span class="name">remove</span> ()</h3> <p>Removes the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p><b>See also </b><a href="qscriptvalueiterator.html#setValue">setValue</a>().</p> <!-- @@@remove --> <!-- $$$scriptName[overload1]$$$scriptName --> <h3 class="fn"><a name="scriptName"></a><span class="type"><a href="qscriptstring.html">QScriptString</a></span> QScriptValueIterator::<span class="name">scriptName</span> () const</h3> <p>Returns the name of the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p>This function was introduced in Qt 4.4.</p> <!-- @@@scriptName --> <!-- $$$setValue[overload1]$$$setValueconstQScriptValue& --> <h3 class="fn"><a name="setValue"></a><span class="type">void</span> QScriptValueIterator::<span class="name">setValue</span> ( const <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> & <i>value</i> )</h3> <p>Sets the <i>value</i> of the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p><b>See also </b><a href="qscriptvalueiterator.html#value">value</a>() and <a href="qscriptvalueiterator.html#name">name</a>().</p> <!-- @@@setValue --> <!-- $$$toBack[overload1]$$$toBack --> <h3 class="fn"><a name="toBack"></a><span class="type">void</span> QScriptValueIterator::<span class="name">toBack</span> ()</h3> <p>Moves the iterator to the back of the <a href="qscriptvalue.html">QScriptValue</a> (after the last property).</p> <p><b>See also </b><a href="qscriptvalueiterator.html#toFront">toFront</a>() and <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <!-- @@@toBack --> <!-- $$$toFront[overload1]$$$toFront --> <h3 class="fn"><a name="toFront"></a><span class="type">void</span> QScriptValueIterator::<span class="name">toFront</span> ()</h3> <p>Moves the iterator to the front of the <a href="qscriptvalue.html">QScriptValue</a> (before the first property).</p> <p><b>See also </b><a href="qscriptvalueiterator.html#toBack">toBack</a>() and <a href="qscriptvalueiterator.html#next">next</a>().</p> <!-- @@@toFront --> <!-- $$$value[overload1]$$$value --> <h3 class="fn"><a name="value"></a><span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> QScriptValueIterator::<span class="name">value</span> () const</h3> <p>Returns the value of the last property that was jumped over using <a href="qscriptvalueiterator.html#next">next</a>() or <a href="qscriptvalueiterator.html#previous">previous</a>().</p> <p><b>See also </b><a href="qscriptvalueiterator.html#setValue">setValue</a>() and <a href="qscriptvalueiterator.html#name">name</a>().</p> <!-- @@@value --> <!-- $$$operator=[overload1]$$$operator=QScriptValue& --> <h3 class="fn"><a name="operator-eq"></a><span class="type">QScriptValueIterator</span> & QScriptValueIterator::<span class="name">operator=</span> ( <span class="type"><a href="qscriptvalue.html">QScriptValue</a></span> & <i>object</i> )</h3> <p>Makes the iterator operate on <i>object</i>. The iterator is set to be at the front of the sequence of properties (before the first property).</p> <!-- @@@operator= --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. 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