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    <a href="index.html" class="qtref"><span>QtMobility Reference Documentation</span></a>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QGalleryMetaDataFilter Class Reference</h1>
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<p>The QGalleryMetaDataFilter class provides a filter which accepts items with meta-data properties matching a specific value. <a href="#details">More...</a></p>
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<pre class="cpp"> <span class="preprocessor">#include &lt;QGalleryMetaDataFilter&gt;</span></pre><p>This class was introduced in Qt Mobility 1.1.</p>
<ul>
<li><a href="qgallerymetadatafilter-members.html">List of all members, including inherited members</a></li>
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<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="qgallerymetadatafilter.html#QGalleryMetaDataFilter">QGalleryMetaDataFilter</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#QGalleryMetaDataFilter-2">QGalleryMetaDataFilter</a></b> ( const QString &amp; <i>property</i>, const QVariant &amp; <i>value</i>, QGalleryFilter::Comparator <i>comparison</i> = QGalleryFilter::Equals )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#QGalleryMetaDataFilter-3">QGalleryMetaDataFilter</a></b> ( const QGalleryMetaDataFilter &amp; <i>filter</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#dtor.QGalleryMetaDataFilter">~QGalleryMetaDataFilter</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGalleryFilter::Comparator </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#comparator">comparator</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#isNegated">isNegated</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#isValid">isValid</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#propertyName">propertyName</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#setComparator">setComparator</a></b> ( QGalleryFilter::Comparator <i>comparator</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#setNegated">setNegated</a></b> ( bool <i>negated</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#setPropertyName">setPropertyName</a></b> ( const QString &amp; <i>name</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#setValue">setValue</a></b> ( const QVariant &amp; <i>value</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#value">value</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGalleryMetaDataFilter </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#operator-not">operator!</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QGalleryMetaDataFilter &amp; </td><td class="memItemRight bottomAlign"><b><a href="qgallerymetadatafilter.html#operator-eq">operator=</a></b> ( const QGalleryMetaDataFilter &amp; <i>filter</i> )</td></tr>
</table>
<a name="details"></a>
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<div class="descr">
<h2>Detailed Description</h2>
<p>The QGalleryMetaDataFilter class provides a filter which accepts items with meta-data properties matching a specific value.</p>
<p>A meta-data filter represents a <a href="qgallerymetadatafilter.html#comparator">comparison</a> between the value of an item's meta-data property() and a fixed <a href="qgallerymetadatafilter.html#value">value</a>(). A filter can be constructed by passing the property name, value, and comparator to the filter contructor or by using one of the operator overloads or constructor functions on <a href="qgalleryproperty.html">QGalleryProperty</a>.</p>
<p>Meta-data filters can also be combined to create <a href="qgalleryunionfilter.html">union</a> or <a href="qgalleryintersectionfilter.html">intersection</a> filters using the || and &amp;&amp; operators respectively.</p>
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<p><b>See also </b><a href="qgalleryfilter.html">QGalleryFilter</a> and <a href="qgalleryproperty.html">QGalleryProperty</a>.</p>
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<div class="func">
<h2>Member Function Documentation</h2>
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<h3 class="fn"><a name="QGalleryMetaDataFilter"></a>QGalleryMetaDataFilter::<span class="name">QGalleryMetaDataFilter</span> ()</h3>
<p>Constructs an empty meta-data filter.</p>
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<h3 class="fn"><a name="QGalleryMetaDataFilter-2"></a>QGalleryMetaDataFilter::<span class="name">QGalleryMetaDataFilter</span> ( const <span class="type"><a href="http://qt.nokia.com/doc/4.7/qstring.html">QString</a></span> &amp; <i>property</i>, const <span class="type"><a href="http://qt.nokia.com/doc/4.7/qvariant.html">QVariant</a></span> &amp; <i>value</i>, <span class="type"><a href="qgalleryfilter.html#Comparator-enum">QGalleryFilter::Comparator</a></span> <i>comparison</i> = QGalleryFilter::Equals )</h3>
<p>Constructs a meta-data filter which tests if a meta-data <i>property</i> matches a <i>value</i> according to a <i>comparison</i> operator.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<!-- @@@QGalleryMetaDataFilter -->
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<h3 class="fn"><a name="QGalleryMetaDataFilter-3"></a>QGalleryMetaDataFilter::<span class="name">QGalleryMetaDataFilter</span> ( const <span class="type">QGalleryMetaDataFilter</span> &amp; <i>filter</i> )</h3>
<p>Constructs a copy of a meta-data <i>filter</i>.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
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<h3 class="fn"><a name="dtor.QGalleryMetaDataFilter"></a>QGalleryMetaDataFilter::<span class="name">~QGalleryMetaDataFilter</span> ()</h3>
<p>Destroys a meta-data filter.</p>
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<h3 class="fn"><a name="comparator"></a><span class="type"><a href="qgalleryfilter.html#Comparator-enum">QGalleryFilter::Comparator</a></span> QGalleryMetaDataFilter::<span class="name">comparator</span> () const</h3>
<p>Returns the comparator used by a meta-data filter.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#setComparator">setComparator</a>().</p>
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<h3 class="fn"><a name="isNegated"></a><span class="type">bool</span> QGalleryMetaDataFilter::<span class="name">isNegated</span> () const</h3>
<p>Returns whether the result of a meta-data filter should be negated.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
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<h3 class="fn"><a name="isValid"></a><span class="type">bool</span> QGalleryMetaDataFilter::<span class="name">isValid</span> () const</h3>
<p>Returns true if the filter is a valid meta-data filter.</p>
<p>An invalid filter can be obtained by casting a non <a href="qgalleryfilter.html#Type-enum">QGalleryFilter::MetaData</a> type <a href="qgalleryfilter.html">QGalleryFilter</a> to <a href="qgallerymetadatafilter.html">QGalleryMetaDataFilter</a>.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
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<h3 class="fn"><a name="propertyName"></a><span class="type"><a href="http://qt.nokia.com/doc/4.7/qstring.html">QString</a></span> QGalleryMetaDataFilter::<span class="name">propertyName</span> () const</h3>
<p>Returns the name of the property the value of a meta-data filter is compared against.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#setPropertyName">setPropertyName</a>().</p>
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<h3 class="fn"><a name="setComparator"></a><span class="type">void</span> QGalleryMetaDataFilter::<span class="name">setComparator</span> ( <span class="type"><a href="qgalleryfilter.html#Comparator-enum">QGalleryFilter::Comparator</a></span> <i>comparator</i> )</h3>
<p>Sets the <i>comparator</i> used by a meta-data filter.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#comparator">comparator</a>().</p>
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<h3 class="fn"><a name="setNegated"></a><span class="type">void</span> QGalleryMetaDataFilter::<span class="name">setNegated</span> ( <span class="type">bool</span> <i>negated</i> )</h3>
<p>Sets whether the result of a meta-data filter should be <i>negated</i>.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#isNegated">isNegated</a>().</p>
<!-- @@@setNegated -->
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<h3 class="fn"><a name="setPropertyName"></a><span class="type">void</span> QGalleryMetaDataFilter::<span class="name">setPropertyName</span> ( const <span class="type"><a href="http://qt.nokia.com/doc/4.7/qstring.html">QString</a></span> &amp; <i>name</i> )</h3>
<p>Sets the <i>name</i> of the property the value of meta-data filter is compared against.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#propertyName">propertyName</a>().</p>
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<h3 class="fn"><a name="setValue"></a><span class="type">void</span> QGalleryMetaDataFilter::<span class="name">setValue</span> ( const <span class="type"><a href="http://qt.nokia.com/doc/4.7/qvariant.html">QVariant</a></span> &amp; <i>value</i> )</h3>
<p>Sets the <i>value</i> a property is expected to match for a meta-data filter to pass.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#value">value</a>().</p>
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<h3 class="fn"><a name="value"></a><span class="type"><a href="http://qt.nokia.com/doc/4.7/qvariant.html">QVariant</a></span> QGalleryMetaDataFilter::<span class="name">value</span> () const</h3>
<p>Returns the value a property is expected to match for a meta-data filter to pass.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<p><b>See also </b><a href="qgallerymetadatafilter.html#setValue">setValue</a>().</p>
<!-- @@@value -->
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<h3 class="fn"><a name="operator-not"></a><span class="type">QGalleryMetaDataFilter</span> QGalleryMetaDataFilter::<span class="name">operator!</span> () const</h3>
<p>Returns a meta-data filter which tests the negation of an existing filter.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
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<h3 class="fn"><a name="operator-eq"></a><span class="type">QGalleryMetaDataFilter</span> &amp; QGalleryMetaDataFilter::<span class="name">operator=</span> ( const <span class="type">QGalleryMetaDataFilter</span> &amp; <i>filter</i> )</h3>
<p>Assigns the value of <i>filter</i> to another meta-data filter.</p>
<p>This function was introduced in Qt Mobility 1.1.</p>
<!-- @@@operator= -->
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