<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- qvariant.cpp --> <title>Obsolete Members for QVariant | Qt Core 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtcore-index.html">Qt Core</a></td><td ><a href="qtcore-module.html">C++ Classes</a></td><td >QVariant</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtcore-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Obsolete Members for QVariant</h1> <p><b>The following members of class <a href="qvariant.html">QVariant</a> are obsolete.</b> They are provided to keep old source code working. We strongly advise against using them in new code.</p> <h2>Public Types</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft topAlign rightAlign"> <code>(obsolete) </code>enum </td><td class="memItemRight bottomAlign"><b><a href="qvariant-obsolete.html#Type-enum">Type</a></b> { Invalid, BitArray, Bitmap, Bool, ..., UserType }</td></tr> </table></div> <h2>Related Non-Members</h2> <div class="table"><table class="alignedsummary"> <tr><td class="memItemLeft topAlign rightAlign"> <code>(obsolete) </code>bool </td><td class="memItemRight bottomAlign"><b><a href="qvariant-obsolete.html#qVariantCanConvert">qVariantCanConvert</a></b>(const QVariant &<i>value</i>)</td></tr> <tr><td class="memItemLeft topAlign rightAlign"> <code>(obsolete) </code>QVariant </td><td class="memItemRight bottomAlign"><b><a href="qvariant-obsolete.html#qVariantFromValue-1">qVariantFromValue</a></b>(const T &<i>value</i>)</td></tr> <tr><td class="memItemLeft topAlign rightAlign"> <code>(obsolete) </code>void </td><td class="memItemRight bottomAlign"><b><a href="qvariant-obsolete.html#qVariantSetValue-1">qVariantSetValue</a></b>(QVariant &<i>variant</i>, const T &<i>value</i>)</td></tr> <tr><td class="memItemLeft topAlign rightAlign"> <code>(obsolete) </code>T </td><td class="memItemRight bottomAlign"><b><a href="qvariant-obsolete.html#qVariantValue">qVariantValue</a></b>(const QVariant &<i>value</i>)</td></tr> </table></div> <h2>Related Non-Members</h2> <!-- $$$qVariantCanConvert[overload1]$$$qVariantCanConvertconstQVariant& --> <h3 class="fn" id="qVariantCanConvert"><a name="qVariantCanConvert"></a><span class="type">bool</span> <span class="name">qVariantCanConvert</span>(const <span class="type"><a href="qvariant.html#QVariant">QVariant</a></span> &<i>value</i>)</h3> <p>This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.</p> <p>Returns <code>true</code> if the given <i>value</i> can be converted to the template type specified; otherwise returns <code>false</code>.</p> <p>This function is equivalent to <a href="qvariant.html#canConvert">QVariant::canConvert</a>(<i>value</i>).</p> <p><b>Note: </b>This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.</p><p><b>See also </b><a href="qvariant.html#canConvert-1">QVariant::canConvert</a>().</p> <!-- @@@qVariantCanConvert --> <!-- $$$qVariantFromValue$$$qVariantFromValueconstT& --> <h3 class="fn" id="qVariantFromValue-1"><a name="qVariantFromValue-1"></a><span class="type"><a href="qvariant.html#QVariant">QVariant</a></span> <span class="name">qVariantFromValue</span>(const <span class="type">T</span> &<i>value</i>)</h3> <p>This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.</p> <p>Returns a variant containing a copy of the given <i>value</i> with template type <code>T</code>.</p> <p>This function is equivalent to <a href="qvariant.html#fromValue">QVariant::fromValue</a>(<i>value</i>).</p> <p><b>Note: </b>This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.</p><p>For example, a <a href="qobject.html">QObject</a> pointer can be stored in a variant with the following code:</p> <pre class="cpp"> <span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>object <span class="operator">=</span> getObjectFromSomewhere(); <span class="type"><a href="qvariant.html">QVariant</a></span> data <span class="operator">=</span> <span class="type"><a href="qvariant.html">QVariant</a></span><span class="operator">::</span>fromValue(object); </pre> <p><b>See also </b><a href="qvariant.html#fromValue">QVariant::fromValue</a>().</p> <!-- @@@qVariantFromValue --> <!-- $$$qVariantSetValue$$$qVariantSetValueQVariant&constT& --> <h3 class="fn" id="qVariantSetValue-1"><a name="qVariantSetValue-1"></a><span class="type">void</span> <span class="name">qVariantSetValue</span>(<span class="type"><a href="qvariant.html#QVariant">QVariant</a></span> &<i>variant</i>, const <span class="type">T</span> &<i>value</i>)</h3> <p>This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.</p> <p>Sets the contents of the given <i>variant</i> to a copy of the <i>value</i> with the specified template type <code>T</code>.</p> <p>This function is equivalent to <a href="qvariant.html#setValue">QVariant::setValue</a>(<i>value</i>).</p> <p><b>Note: </b>This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.</p><p><b>See also </b><a href="qvariant.html#setValue">QVariant::setValue</a>().</p> <!-- @@@qVariantSetValue --> <!-- $$$qVariantValue[overload1]$$$qVariantValueconstQVariant& --> <h3 class="fn" id="qVariantValue"><a name="qVariantValue"></a><span class="type">T</span> <span class="name">qVariantValue</span>(const <span class="type"><a href="qvariant.html#QVariant">QVariant</a></span> &<i>value</i>)</h3> <p>This function is obsolete. It is provided to keep old source code working. We strongly advise against using it in new code.</p> <p>Returns the given <i>value</i> converted to the template type <code>T</code>.</p> <p>This function is equivalent to <a href="qvariant.html#value">QVariant::value</a><T>(<i>value</i>).</p> <p><b>Note: </b>This function was provided as a workaround for MSVC 6 which did not support member template functions. It is advised to use the other form in new code.</p><p><b>See also </b><a href="qvariant.html#value">QVariant::value</a>() and <a href="qvariant.html#qvariant_cast">qvariant_cast</a>().</p> <!-- @@@qVariantValue --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. 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