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<td >Qt 5.9</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QMimeType</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td>
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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="#related-non-members">Related Non-Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QMimeType Class</h1>
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<p>The <a href="qmimetype.html">QMimeType</a> class describes types of file or data, represented by a MIME type string. <a href="#details">More...</a></p>
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<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QMimeType&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += core</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.0</td></tr></table></div><ul>
<li><a href="qmimetype-members.html">List of all members, including inherited members</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#QMimeType">QMimeType</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#QMimeType-1">QMimeType</a></b>(const QMimeType &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#dtor.QMimeType">~QMimeType</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#aliases">aliases</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#allAncestors">allAncestors</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#comment">comment</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#filterString">filterString</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#genericIconName">genericIconName</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#globPatterns">globPatterns</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#iconName">iconName</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#inherits">inherits</a></b>(const QString &amp;<i>mimeTypeName</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#isDefault">isDefault</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#isValid">isValid</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#name">name</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#parentMimeTypes">parentMimeTypes</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#preferredSuffix">preferredSuffix</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QStringList </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#suffixes">suffixes</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#swap">swap</a></b>(QMimeType &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#operator-not-eq">operator!=</a></b>(const QMimeType &amp;<i>other</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMimeType &amp;</td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#operator-eq">operator=</a></b>(const QMimeType &amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QMimeType &amp;</td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#operator-eq-1">operator=</a></b>(QMimeType &amp;&amp;<i>other</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#operator-eq-eq">operator==</a></b>(const QMimeType &amp;<i>other</i>) const</td></tr>
</table></div>
<a name="related-non-members"></a>
<h2 id="related-non-members">Related Non-Members</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> uint </td><td class="memItemRight bottomAlign"><b><a href="qmimetype.html#qHash">qHash</a></b>(const QMimeType &amp;<i>key</i>, uint <i>seed</i> = 0)</td></tr>
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<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qmimetype.html">QMimeType</a> class describes types of file or data, represented by a MIME type string.</p>
<p>For instance a file named &quot;readme.txt&quot; has the MIME type &quot;text/plain&quot;. The MIME type can be determined from the file name, or from the file contents, or from both. MIME type determination can also be done on buffers of data not coming from files.</p>
<p>Determining the MIME type of a file can be useful to make sure your application supports it. It is also useful in file-manager-like applications or widgets, in order to display an appropriate <a href="qmimetype.html#iconName">icon</a> for the file, or even the descriptive <a href="qmimetype.html#comment">comment</a> in detailed views.</p>
<p>To check if a file has the expected MIME type, you should use <a href="qmimetype.html#inherits">inherits</a>() rather than a simple string comparison based on the <a href="qmimetype.html#name">name</a>(). This is because MIME types can inherit from each other: for instance a C source file is a specific type of plain text file, so text/x-csrc inherits text/plain.</p>
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<p><b>See also </b><a href="qmimedatabase.html">QMimeDatabase</a> and <a href="qtcore-mimetypes-mimetypebrowser-example.html">MIME Type Browser Example</a>.</p>
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<h2>Member Function Documentation</h2>
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<h3 class="fn" id="QMimeType"><a name="QMimeType"></a>QMimeType::<span class="name">QMimeType</span>()</h3>
<p>Constructs this <a href="qmimetype.html">QMimeType</a> object initialized with default property values that indicate an invalid MIME type.</p>
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<h3 class="fn" id="QMimeType-1"><a name="QMimeType-1"></a>QMimeType::<span class="name">QMimeType</span>(const <span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>other</i>)</h3>
<p>Constructs this <a href="qmimetype.html">QMimeType</a> object as a copy of <i>other</i>.</p>
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<h3 class="fn" id="dtor.QMimeType"><a name="dtor.QMimeType"></a>QMimeType::<span class="name">~QMimeType</span>()</h3>
<p>Destroys the <a href="qmimetype.html">QMimeType</a> object, and releases the d pointer.</p>
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<h3 class="fn" id="aliases"><a name="aliases"></a><span class="type"><a href="qstringlist.html">QStringList</a></span> QMimeType::<span class="name">aliases</span>() const</h3>
<p>Return the list of aliases of this mimetype.</p>
<p>For instance, for text/csv, the returned list would be: text/x-csv, text/x-comma-separated-values.</p>
<p>Note that all <a href="qmimetype.html">QMimeType</a> instances refer to proper mimetypes, never to aliases directly.</p>
<p>The order of the aliases in the list is undefined.</p>
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<h3 class="fn" id="allAncestors"><a name="allAncestors"></a><span class="type"><a href="qstringlist.html">QStringList</a></span> QMimeType::<span class="name">allAncestors</span>() const</h3>
<p>Return all the parent mimetypes of this mimetype, direct and indirect. This includes the parent(s) of its parent(s), etc.</p>
<p>For instance, for image/svg+xml the list would be: application/xml, text/plain, application/octet-stream.</p>
<p>Note that application/octet-stream is the ultimate parent for all types of files (but not directories).</p>
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<h3 class="fn" id="comment"><a name="comment"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">comment</span>() const</h3>
<p>Returns the description of the MIME type to be displayed on user interfaces.</p>
<p>The default language (QLocale().<a href="qmimetype.html#name">name</a>()) is used to select the appropriate translation.</p>
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<h3 class="fn" id="filterString"><a name="filterString"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">filterString</span>() const</h3>
<p>Returns a filter string usable for a file dialog.</p>
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<h3 class="fn" id="genericIconName"><a name="genericIconName"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">genericIconName</span>() const</h3>
<p>Returns the file name of a generic icon that represents the MIME type.</p>
<p>This should be used if the icon returned by <a href="qmimetype.html#iconName">iconName</a>() cannot be found on the system. It is used for categories of similar types (like spreadsheets or archives) that can use a common icon. The freedesktop.org Icon Naming Specification lists a set of such icon names.</p>
<p>The icon name can be given to <a href="../qtgui/qicon.html#fromTheme">QIcon::fromTheme</a>() in order to load the icon.</p>
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<h3 class="fn" id="globPatterns"><a name="globPatterns"></a><span class="type"><a href="qstringlist.html">QStringList</a></span> QMimeType::<span class="name">globPatterns</span>() const</h3>
<p>Returns the list of glob matching patterns.</p>
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<h3 class="fn" id="iconName"><a name="iconName"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">iconName</span>() const</h3>
<p>Returns the file name of an icon image that represents the MIME type.</p>
<p>The icon name can be given to <a href="../qtgui/qicon.html#fromTheme">QIcon::fromTheme</a>() in order to load the icon.</p>
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<h3 class="fn" id="inherits"><a name="inherits"></a><span class="type">bool</span> QMimeType::<span class="name">inherits</span>(const <span class="type"><a href="qstring.html">QString</a></span> &amp;<i>mimeTypeName</i>) const</h3>
<p>Returns <code>true</code> if this mimetype is <i>mimeTypeName</i>, or inherits <i>mimeTypeName</i> (see <a href="qmimetype.html#parentMimeTypes">parentMimeTypes</a>()), or <i>mimeTypeName</i> is an alias for this mimetype.</p>
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<h3 class="fn" id="isDefault"><a name="isDefault"></a><span class="type">bool</span> QMimeType::<span class="name">isDefault</span>() const</h3>
<p>Returns <code>true</code> if this MIME type is the default MIME type which applies to all files: application/octet-stream.</p>
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<h3 class="fn" id="isValid"><a name="isValid"></a><span class="type">bool</span> QMimeType::<span class="name">isValid</span>() const</h3>
<p>Returns <code>true</code> if the <a href="qmimetype.html">QMimeType</a> object contains valid data, otherwise returns <code>false</code>. A valid MIME type has a non-empty <a href="qmimetype.html#name">name</a>(). The invalid MIME type is the default-constructed <a href="qmimetype.html">QMimeType</a>.</p>
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<h3 class="fn" id="name"><a name="name"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">name</span>() const</h3>
<p>Returns the name of the MIME type.</p>
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<h3 class="fn" id="parentMimeTypes"><a name="parentMimeTypes"></a><span class="type"><a href="qstringlist.html">QStringList</a></span> QMimeType::<span class="name">parentMimeTypes</span>() const</h3>
<p>A type is a subclass of another type if any instance of the first type is also an instance of the second. For example, all image/svg+xml files are also text/xml, text/plain and application/octet-stream files. Subclassing is about the format, rather than the category of the data (for example, there is no 'generic spreadsheet' class that all spreadsheets inherit from). Conversely, the parent mimetype of image/svg+xml is text/xml.</p>
<p>A mimetype can have multiple parents. For instance application/x-perl has two parents: application/x-executable and text/plain. This makes it possible to both execute perl scripts, and to open them in text editors.</p>
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<h3 class="fn" id="preferredSuffix"><a name="preferredSuffix"></a><span class="type"><a href="qstring.html">QString</a></span> QMimeType::<span class="name">preferredSuffix</span>() const</h3>
<p>Returns the preferred suffix for the MIME type. No leading dot is included, so for instance this would return &quot;pdf&quot; for application/pdf. The return value can be empty, for mime types which do not have any suffixes associated.</p>
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<h3 class="fn" id="suffixes"><a name="suffixes"></a><span class="type"><a href="qstringlist.html">QStringList</a></span> QMimeType::<span class="name">suffixes</span>() const</h3>
<p>Returns the known suffixes for the MIME type. No leading dot is included, so for instance this would return &quot;jpg&quot;, &quot;jpeg&quot; for image/jpeg.</p>
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<h3 class="fn" id="swap"><a name="swap"></a><span class="type">void</span> QMimeType::<span class="name">swap</span>(<span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>other</i>)</h3>
<p>Swaps <a href="qmimetype.html">QMimeType</a> <i>other</i> with this <a href="qmimetype.html">QMimeType</a> object.</p>
<p>This operation is very fast and never fails.</p>
<p>The swap() method helps with the implementation of assignment operators in an exception-safe way. For more information consult <a href="http://en.wikibooks.org/wiki/More_C++_Idioms/Copy-and-swap">More C++ Idioms - Copy-and-swap</a>.</p>
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<h3 class="fn" id="operator-not-eq"><a name="operator-not-eq"></a><span class="type">bool</span> QMimeType::<span class="name">operator!=</span>(const <span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>other</i>) const</h3>
<p>Returns <code>true</code> if <i>other</i> does not equal this <a href="qmimetype.html">QMimeType</a> object, otherwise returns <code>false</code>.</p>
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<!-- $$$operator=[overload1]$$$operator=constQMimeType& -->
<h3 class="fn" id="operator-eq"><a name="operator-eq"></a><span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;QMimeType::<span class="name">operator=</span>(const <span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>other</i>)</h3>
<p>Assigns the data of <i>other</i> to this <a href="qmimetype.html">QMimeType</a> object, and returns a reference to this object.</p>
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<h3 class="fn" id="operator-eq-1"><a name="operator-eq-1"></a><span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;QMimeType::<span class="name">operator=</span>(<span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;&amp;<i>other</i>)</h3>
<p>Move-assigns <i>other</i> to this <a href="qmimetype.html">QMimeType</a> instance.</p>
<p>This function was introduced in  Qt 5.2.</p>
<!-- @@@operator= -->
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<h3 class="fn" id="operator-eq-eq"><a name="operator-eq-eq"></a><span class="type">bool</span> QMimeType::<span class="name">operator==</span>(const <span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>other</i>) const</h3>
<p>Returns <code>true</code> if <i>other</i> equals this <a href="qmimetype.html">QMimeType</a> object, otherwise returns <code>false</code>. The name is the unique identifier for a mimetype, so two mimetypes with the same name, are equal.</p>
<!-- @@@operator== -->
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<div class="relnonmem">
<h2>Related Non-Members</h2>
<!-- $$$qHash[overload1]$$$qHashconstQMimeType&uint -->
<h3 class="fn" id="qHash"><a name="qHash"></a><span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> <span class="name">qHash</span>(const <span class="type"><a href="qmimetype.html#QMimeType">QMimeType</a></span> &amp;<i>key</i>, <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> <i>seed</i> = 0)</h3>
<p>Returns the hash value for <i>key</i>, using <i>seed</i> to seed the calculation.</p>
<p>This function was introduced in  Qt 5.6.</p>
<!-- @@@qHash -->
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