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<h1 class="title">QDirIterator Class Reference</h1>
<!-- $$$QDirIterator-brief -->
<p>The QDirIterator class provides an iterator for directory entrylists. <a href="#details">More...</a></p>
<!-- @@@QDirIterator -->
<pre class="cpp"> <span class="preprocessor">#include &lt;QDirIterator&gt;</span></pre><p>This class was introduced in Qt 4.3.</p>
<ul>
<li><a href="qdiriterator-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"> enum </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlag</a></b> { NoIteratorFlags, Subdirectories, FollowSymlinks }</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> flags </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</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="qdiriterator.html#QDirIterator">QDirIterator</a></b> ( const QDir &amp; <i>dir</i>, IteratorFlags <i>flags</i> = NoIteratorFlags )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#QDirIterator-2">QDirIterator</a></b> ( const QString &amp; <i>path</i>, IteratorFlags <i>flags</i> = NoIteratorFlags )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#QDirIterator-3">QDirIterator</a></b> ( const QString &amp; <i>path</i>, QDir::Filters <i>filters</i>, IteratorFlags <i>flags</i> = NoIteratorFlags )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#QDirIterator-4">QDirIterator</a></b> ( const QString &amp; <i>path</i>, const QStringList &amp; <i>nameFilters</i>, QDir::Filters <i>filters</i> = QDir::NoFilter, IteratorFlags <i>flags</i> = NoIteratorFlags )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#dtor.QDirIterator">~QDirIterator</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QFileInfo </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#fileInfo">fileInfo</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#fileName">fileName</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#filePath">filePath</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#hasNext">hasNext</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#next">next</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qdiriterator.html#path">path</a></b> () const</td></tr>
</table>
<a name="details"></a>
<!-- $$$QDirIterator-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The QDirIterator class provides an iterator for directory entrylists.</p>
<p>You can use QDirIterator to navigate entries of a directory one at a time. It is similar to <a href="qdir.html#entryList">QDir::entryList</a>() and <a href="qdir.html#entryInfoList">QDir::entryInfoList</a>(), but because it lists entries one at a time instead of all at once, it scales better and is more suitable for large directories. It also supports listing directory contents recursively, and following symbolic links. Unlike <a href="qdir.html#entryList">QDir::entryList</a>(), QDirIterator does not support sorting.</p>
<p>The QDirIterator constructor takes a <a href="qdir.html">QDir</a> or a directory as argument. After construction, the iterator is located before the first directory entry. Here's how to iterate over all the entries sequentially:</p>
<pre class="cpp"> <span class="type">QDirIterator</span> it(<span class="string">&quot;/etc&quot;</span><span class="operator">,</span> <span class="type">QDirIterator</span><span class="operator">::</span>Subdirectories);
<span class="keyword">while</span> (it<span class="operator">.</span>hasNext()) {
<a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator">&lt;</span><span class="operator">&lt;</span> it<span class="operator">.</span>next();
<span class="comment">// /etc/.</span>
<span class="comment">// /etc/..</span>
<span class="comment">// /etc/X11</span>
<span class="comment">// /etc/X11/fs</span>
<span class="comment">// ...</span>
}</pre>
<p>The <a href="qdiriterator.html#next">next</a>() function returns the path to the next directory entry and advances the iterator. You can also call <a href="qdiriterator.html#filePath">filePath</a>() to get the current file path without advancing the iterator. The <a href="qdiriterator.html#fileName">fileName</a>() function returns only the name of the file, similar to how <a href="qdir.html#entryList">QDir::entryList</a>() works. You can also call <a href="qdiriterator.html#fileInfo">fileInfo</a>() to get a <a href="qfileinfo.html">QFileInfo</a> for the current entry.</p>
<p>Unlike Qt's container iterators, QDirIterator is uni-directional (i.e&#x2e;, you cannot iterate directories in reverse order) and does not allow random access.</p>
<p>QDirIterator works with all supported file engines, and is implemented using <a href="qabstractfileengineiterator.html">QAbstractFileEngineIterator</a>.</p>
</div>
<p><b>See also </b><a href="qdir.html">QDir</a>, <a href="qdir.html#entryList">QDir::entryList</a>(), and <a href="qabstractfileengineiterator.html">QAbstractFileEngineIterator</a>.</p>
<!-- @@@QDirIterator -->
<div class="types">
<h2>Member Type Documentation</h2>
<!-- $$$IteratorFlag$$$NoIteratorFlags$$$FollowSymlinks$$$Subdirectories -->
<h3 class="flags"><a name="IteratorFlag-enum"></a>enum QDirIterator::<span class="name">IteratorFlag</span><br/>flags QDirIterator::<span class="name">IteratorFlags</span></h3>
<p>This enum describes flags that you can combine to configure the behavior of <a href="qdiriterator.html">QDirIterator</a>.</p>
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
<tr><td class="topAlign"><tt>QDirIterator::NoIteratorFlags</tt></td><td class="topAlign"><tt>0x0</tt></td><td class="topAlign">The default value, representing no flags. The iterator will return entries for the assigned path.</td></tr>
<tr><td class="topAlign"><tt>QDirIterator::Subdirectories</tt></td><td class="topAlign"><tt>0x2</tt></td><td class="topAlign">List entries inside all subdirectories as well.</td></tr>
<tr><td class="topAlign"><tt>QDirIterator::FollowSymlinks</tt></td><td class="topAlign"><tt>0x1</tt></td><td class="topAlign">When combined with Subdirectories, this flag enables iterating through all subdirectories of the assigned path, following all symbolic links. Symbolic link loops (e.g&#x2e;, &quot;link&quot; =&gt; &quot;.&quot; or &quot;link&quot; =&gt; &quot;..&quot;) are automatically detected and ignored.</td></tr>
</table>
<p>The IteratorFlags type is a typedef for <a href="qflags.html">QFlags</a>&lt;IteratorFlag&gt;. It stores an OR combination of IteratorFlag values.</p>
<!-- @@@IteratorFlag -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QDirIterator[overload1]$$$QDirIteratorconstQDir&IteratorFlags -->
<h3 class="fn"><a name="QDirIterator"></a>QDirIterator::<span class="name">QDirIterator</span> ( const <span class="type"><a href="qdir.html">QDir</a></span> &amp; <i>dir</i>, <span class="type"><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a></span> <i>flags</i> = NoIteratorFlags )</h3>
<p>Constructs a <a href="qdiriterator.html">QDirIterator</a> that can iterate over <i>dir</i>'s entrylist, using <i>dir</i>'s name filters and regular filters. You can pass options via <i>flags</i> to decide how the directory should be iterated.</p>
<p>By default, <i>flags</i> is <a href="qdiriterator.html#IteratorFlag-enum">NoIteratorFlags</a>, which provides the same behavior as in <a href="qdir.html#entryList">QDir::entryList</a>().</p>
<p>The sorting in <i>dir</i> is ignored.</p>
<p><b>Note:</b> To list symlinks that point to non existing files, <a href="qdir.html#Filter-enum">QDir::System</a> must be passed to the flags.</p>
<p><b>See also </b><a href="qdiriterator.html#hasNext">hasNext</a>(), <a href="qdiriterator.html#next">next</a>(), and <a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a>.</p>
<!-- @@@QDirIterator -->
<!-- $$$QDirIterator$$$QDirIteratorconstQString&IteratorFlags -->
<h3 class="fn"><a name="QDirIterator-2"></a>QDirIterator::<span class="name">QDirIterator</span> ( const <span class="type"><a href="qstring.html">QString</a></span> &amp; <i>path</i>, <span class="type"><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a></span> <i>flags</i> = NoIteratorFlags )</h3>
<p>Constructs a <a href="qdiriterator.html">QDirIterator</a> that can iterate over <i>path</i>. You can pass options via <i>flags</i> to decide how the directory should be iterated.</p>
<p>By default, <i>flags</i> is <a href="qdiriterator.html#IteratorFlag-enum">NoIteratorFlags</a>, which provides the same behavior as in <a href="qdir.html#entryList">QDir::entryList</a>().</p>
<p><b>Note:</b> To list symlinks that point to non existing files, <a href="qdir.html#Filter-enum">QDir::System</a> must be passed to the flags.</p>
<p><b>See also </b><a href="qdiriterator.html#hasNext">hasNext</a>(), <a href="qdiriterator.html#next">next</a>(), and <a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a>.</p>
<!-- @@@QDirIterator -->
<!-- $$$QDirIterator$$$QDirIteratorconstQString&QDir::FiltersIteratorFlags -->
<h3 class="fn"><a name="QDirIterator-3"></a>QDirIterator::<span class="name">QDirIterator</span> ( const <span class="type"><a href="qstring.html">QString</a></span> &amp; <i>path</i>, <span class="type"><a href="qdir.html#Filter-enum">QDir::Filters</a></span> <i>filters</i>, <span class="type"><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a></span> <i>flags</i> = NoIteratorFlags )</h3>
<p>Constructs a <a href="qdiriterator.html">QDirIterator</a> that can iterate over <i>path</i>, with no name filtering and <i>filters</i> for entry filtering. You can pass options via <i>flags</i> to decide how the directory should be iterated.</p>
<p>By default, <i>filters</i> is <a href="qdir.html#Filter-enum">QDir::NoFilter</a>, and <i>flags</i> is <a href="qdiriterator.html#IteratorFlag-enum">NoIteratorFlags</a>, which provides the same behavior as in <a href="qdir.html#entryList">QDir::entryList</a>().</p>
<p><b>Note:</b> To list symlinks that point to non existing files, <a href="qdir.html#Filter-enum">QDir::System</a> must be passed to the flags.</p>
<p><b>See also </b><a href="qdiriterator.html#hasNext">hasNext</a>(), <a href="qdiriterator.html#next">next</a>(), and <a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a>.</p>
<!-- @@@QDirIterator -->
<!-- $$$QDirIterator$$$QDirIteratorconstQString&constQStringList&QDir::FiltersIteratorFlags -->
<h3 class="fn"><a name="QDirIterator-4"></a>QDirIterator::<span class="name">QDirIterator</span> ( const <span class="type"><a href="qstring.html">QString</a></span> &amp; <i>path</i>, const <span class="type"><a href="qstringlist.html">QStringList</a></span> &amp; <i>nameFilters</i>, <span class="type"><a href="qdir.html#Filter-enum">QDir::Filters</a></span> <i>filters</i> = QDir::NoFilter, <span class="type"><a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a></span> <i>flags</i> = NoIteratorFlags )</h3>
<p>Constructs a <a href="qdiriterator.html">QDirIterator</a> that can iterate over <i>path</i>, using <i>nameFilters</i> and <i>filters</i>. You can pass options via <i>flags</i> to decide how the directory should be iterated.</p>
<p>By default, <i>flags</i> is <a href="qdiriterator.html#IteratorFlag-enum">NoIteratorFlags</a>, which provides the same behavior as <a href="qdir.html#entryList">QDir::entryList</a>().</p>
<p><b>Note:</b> To list symlinks that point to non existing files, <a href="qdir.html#Filter-enum">QDir::System</a> must be passed to the flags.</p>
<p><b>See also </b><a href="qdiriterator.html#hasNext">hasNext</a>(), <a href="qdiriterator.html#next">next</a>(), and <a href="qdiriterator.html#IteratorFlag-enum">IteratorFlags</a>.</p>
<!-- @@@QDirIterator -->
<!-- $$$~QDirIterator[overload1]$$$~QDirIterator -->
<h3 class="fn"><a name="dtor.QDirIterator"></a>QDirIterator::<span class="name">~QDirIterator</span> ()<tt> [virtual]</tt></h3>
<p>Destroys the <a href="qdiriterator.html">QDirIterator</a>.</p>
<!-- @@@~QDirIterator -->
<!-- $$$fileInfo[overload1]$$$fileInfo -->
<h3 class="fn"><a name="fileInfo"></a><span class="type"><a href="qfileinfo.html">QFileInfo</a></span> QDirIterator::<span class="name">fileInfo</span> () const</h3>
<p>Returns a <a href="qfileinfo.html">QFileInfo</a> for the current directory entry.</p>
<p><b>See also </b><a href="qdiriterator.html#filePath">filePath</a>() and <a href="qdiriterator.html#fileName">fileName</a>().</p>
<!-- @@@fileInfo -->
<!-- $$$fileName[overload1]$$$fileName -->
<h3 class="fn"><a name="fileName"></a><span class="type"><a href="qstring.html">QString</a></span> QDirIterator::<span class="name">fileName</span> () const</h3>
<p>Returns the file name for the current directory entry, without the path prepended.</p>
<p>This function is convenient when iterating a single directory. When using the <a href="qdiriterator.html#IteratorFlag-enum">QDirIterator::Subdirectories</a> flag, you can use <a href="qdiriterator.html#filePath">filePath</a>() to get the full path.</p>
<p><b>See also </b><a href="qdiriterator.html#filePath">filePath</a>() and <a href="qdiriterator.html#fileInfo">fileInfo</a>().</p>
<!-- @@@fileName -->
<!-- $$$filePath[overload1]$$$filePath -->
<h3 class="fn"><a name="filePath"></a><span class="type"><a href="qstring.html">QString</a></span> QDirIterator::<span class="name">filePath</span> () const</h3>
<p>Returns the full file path for the current directory entry.</p>
<p><b>See also </b><a href="qdiriterator.html#fileInfo">fileInfo</a>() and <a href="qdiriterator.html#fileName">fileName</a>().</p>
<!-- @@@filePath -->
<!-- $$$hasNext[overload1]$$$hasNext -->
<h3 class="fn"><a name="hasNext"></a><span class="type">bool</span> QDirIterator::<span class="name">hasNext</span> () const</h3>
<p>Returns true if there is at least one more entry in the directory; otherwise, false is returned.</p>
<p><b>See also </b><a href="qdiriterator.html#next">next</a>(), <a href="qdiriterator.html#fileName">fileName</a>(), <a href="qdiriterator.html#filePath">filePath</a>(), and <a href="qdiriterator.html#fileInfo">fileInfo</a>().</p>
<!-- @@@hasNext -->
<!-- $$$next[overload1]$$$next -->
<h3 class="fn"><a name="next"></a><span class="type"><a href="qstring.html">QString</a></span> QDirIterator::<span class="name">next</span> ()</h3>
<p>Advances the iterator to the next entry, and returns the file path of this new entry. If <a href="qdiriterator.html#hasNext">hasNext</a>() returns false, this function does nothing, and returns a null <a href="qstring.html">QString</a>.</p>
<p>You can call <a href="qdiriterator.html#fileName">fileName</a>() or <a href="qdiriterator.html#filePath">filePath</a>() to get the current entry file name or path, or <a href="qdiriterator.html#fileInfo">fileInfo</a>() to get a <a href="qfileinfo.html">QFileInfo</a> for the current entry.</p>
<p><b>See also </b><a href="qdiriterator.html#hasNext">hasNext</a>(), <a href="qdiriterator.html#fileName">fileName</a>(), <a href="qdiriterator.html#filePath">filePath</a>(), and <a href="qdiriterator.html#fileInfo">fileInfo</a>().</p>
<!-- @@@next -->
<!-- $$$path[overload1]$$$path -->
<h3 class="fn"><a name="path"></a><span class="type"><a href="qstring.html">QString</a></span> QDirIterator::<span class="name">path</span> () const</h3>
<p>Returns the base directory of the iterator.</p>
<!-- @@@path -->
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