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<?xml version="1.0" encoding="iso-8859-1"?>
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<title>QScriptValueIterator Class Reference</title>
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</tr></table><h1 class="title">QScriptValueIterator Class Reference<br /><span class="small-subtitle">[<a href="http://qt.nokia.com/doc/4.6/qtscript.html">QtScript</a> module]</span>
</h1>
<p>The QScriptValueIterator class provides a Java-style iterator for <a href="qscriptvalue.html">QScriptValue</a>. <a href="#details">More...</a></p>
<pre> #include <QScriptValueIterator></pre><p><b>This class is not part of the Qt GUI Framework Edition.</b></p>
<p>This class was introduced in qtscriptclassic 4.3.</p>
<ul>
<li><a href="qscriptvalueiterator-members.html">List of all members, including inherited members</a></li>
</ul>
<hr />
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#QScriptValueIterator">QScriptValueIterator</a></b> ( const QScriptValue & <i>object</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#dtor.QScriptValueIterator">~QScriptValueIterator</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QScriptValue::PropertyFlags </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#flags">flags</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#hasNext">hasNext</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QString </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#name">name</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#next">next</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#previous">previous</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#remove">remove</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QScriptString </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#scriptName">scriptName</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#setValue">setValue</a></b> ( const QScriptValue & <i>value</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#toBack">toBack</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#toFront">toFront</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QScriptValue </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#value">value</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QScriptValueIterator & </td><td class="memItemRight" valign="bottom"><b><a href="qscriptvalueiterator.html#operator-eq">operator=</a></b> ( QScriptValue & <i>object</i> )</td></tr>
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<a name="details"></a>
<hr />
<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> QScriptValue object;
...
QScriptValueIterator it(object);
while (it.hasNext()) {
it.next();
qDebug() << it.name() << ": " << it.value().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> QScriptValue obj = ...; <span class="comment">// the object to iterate over</span>
while (obj.isObject()) {
QScriptValueIterator it(obj);
while (it.hasNext()) {
it.next();
qDebug() << it.name();
}
obj = obj.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> while (it.hasNext()) {
it.next();
if (it.flags() & QScriptValue::SkipInEnumeration)
continue;
qDebug() << "found enumerated property:" << it.name();
}</pre>
<p>See also <a href="qscriptvalue.html#property">QScriptValue::property</a>().</p>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QScriptValueIterator"></a>QScriptValueIterator::QScriptValueIterator ( const <a href="qscriptvalue.html">QScriptValue</a> & <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>
<h3 class="fn"><a name="dtor.QScriptValueIterator"></a>QScriptValueIterator::~QScriptValueIterator ()</h3>
<p>Destroys the iterator.</p>
<h3 class="fn"><a name="flags"></a><a href="qscriptvalue.html#PropertyFlag-enum">QScriptValue::PropertyFlags</a> QScriptValueIterator::flags () 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>See also <a href="qscriptvalueiterator.html#value">value</a>().</p>
<h3 class="fn"><a name="hasNext"></a>bool QScriptValueIterator::hasNext () 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>See also <a href="qscriptvalueiterator.html#next">next</a>() and <a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a>().</p>
<h3 class="fn"><a name="hasPrevious"></a>bool QScriptValueIterator::hasPrevious () 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>See also <a href="qscriptvalueiterator.html#previous">previous</a>() and <a href="qscriptvalueiterator.html#hasNext">hasNext</a>().</p>
<h3 class="fn"><a name="name"></a><a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> QScriptValueIterator::name () 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>See also <a href="qscriptvalueiterator.html#value">value</a>() and <a href="qscriptvalueiterator.html#flags">flags</a>().</p>
<h3 class="fn"><a name="next"></a>void QScriptValueIterator::next ()</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>See also <a href="qscriptvalueiterator.html#hasNext">hasNext</a>(), <a href="qscriptvalueiterator.html#previous">previous</a>(), and <a href="qscriptvalueiterator.html#name">name</a>().</p>
<h3 class="fn"><a name="previous"></a>void QScriptValueIterator::previous ()</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>See also <a href="qscriptvalueiterator.html#hasPrevious">hasPrevious</a>(), <a href="qscriptvalueiterator.html#next">next</a>(), and <a href="qscriptvalueiterator.html#name">name</a>().</p>
<h3 class="fn"><a name="remove"></a>void QScriptValueIterator::remove ()</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>See also <a href="qscriptvalueiterator.html#setValue">setValue</a>().</p>
<h3 class="fn"><a name="scriptName"></a><a href="qscriptstring.html">QScriptString</a> QScriptValueIterator::scriptName () 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 qtscriptclassic 4.4.</p>
<h3 class="fn"><a name="setValue"></a>void QScriptValueIterator::setValue ( const <a href="qscriptvalue.html">QScriptValue</a> & <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>See also <a href="qscriptvalueiterator.html#value">value</a>() and <a href="qscriptvalueiterator.html#name">name</a>().</p>
<h3 class="fn"><a name="toBack"></a>void QScriptValueIterator::toBack ()</h3>
<p>Moves the iterator to the back of the <a href="qscriptvalue.html">QScriptValue</a> (after the last property).</p>
<p>See also <a href="qscriptvalueiterator.html#toFront">toFront</a>() and <a href="qscriptvalueiterator.html#previous">previous</a>().</p>
<h3 class="fn"><a name="toFront"></a>void QScriptValueIterator::toFront ()</h3>
<p>Moves the iterator to the front of the <a href="qscriptvalue.html">QScriptValue</a> (before the first property).</p>
<p>See also <a href="qscriptvalueiterator.html#toBack">toBack</a>() and <a href="qscriptvalueiterator.html#next">next</a>().</p>
<h3 class="fn"><a name="value"></a><a href="qscriptvalue.html">QScriptValue</a> QScriptValueIterator::value () 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>See also <a href="qscriptvalueiterator.html#setValue">setValue</a>() and <a href="qscriptvalueiterator.html#name">name</a>().</p>
<h3 class="fn"><a name="operator-eq"></a>QScriptValueIterator & QScriptValueIterator::operator= ( <a href="qscriptvalue.html">QScriptValue</a> & <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>
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