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Breadcrumbs go here --> <li><a href="modules.html">Modules</a></li> <li><a href="qtcore.html">QtCore</a></li> <li>QMetaProperty</li> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#public-functions">Public Functions</a></li> <li class="level1"><a href="#details">Detailed Description</a></li> <li class="level2"><a href="#property-meta-data">Property Meta-Data</a></li> <li class="level2"><a href="#copying-and-assignment">Copying and Assignment</a></li> </ul> </div> <h1 class="title">QMetaProperty Class Reference</h1> <!-- $$$QMetaProperty-brief --> <p>The QMetaProperty class provides meta-data about a property. <a href="#details">More...</a></p> <!-- @@@QMetaProperty --> <pre class="cpp"> <span class="preprocessor">#include <QMetaProperty></span></pre><ul> <li><a href="qmetaproperty-members.html">List of all members, including inherited members</a></li> <li><a href="qmetaproperty-obsolete.html">Obsolete members</a></li> </ul> <a name="public-functions"></a> <h2>Public Functions</h2> <table class="alignedsummary"> <tr><td class="memItemLeft rightAlign topAlign"> QMetaEnum </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#enumerator">enumerator</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#hasNotifySignal">hasNotifySignal</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isConstant">isConstant</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isDesignable">isDesignable</a></b> ( const QObject * <i>object</i> = 0 ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isEnumType">isEnumType</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isFinal">isFinal</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isFlagType">isFlagType</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isReadable">isReadable</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isResettable">isResettable</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isScriptable">isScriptable</a></b> ( const QObject * <i>object</i> = 0 ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isStored">isStored</a></b> ( const QObject * <i>object</i> = 0 ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isUser">isUser</a></b> ( const QObject * <i>object</i> = 0 ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isValid">isValid</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#isWritable">isWritable</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> const char * </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#name">name</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QMetaMethod </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#notifySignal">notifySignal</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#notifySignalIndex">notifySignalIndex</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#propertyIndex">propertyIndex</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#read">read</a></b> ( const QObject * <i>object</i> ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#reset">reset</a></b> ( QObject * <i>object</i> ) const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> QVariant::Type </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#type">type</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> const char * </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#typeName">typeName</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#userType">userType</a></b> () const</td></tr> <tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qmetaproperty.html#write">write</a></b> ( QObject * <i>object</i>, const QVariant & <i>value</i> ) const</td></tr> </table> <a name="details"></a> <!-- $$$QMetaProperty-description --> <div class="descr"> <h2>Detailed Description</h2> <p>The QMetaProperty class provides meta-data about a property.</p> <p>Property meta-data is obtained from an object's meta-object. See <a href="qmetaobject.html#property">QMetaObject::property</a>() and <a href="qmetaobject.html#propertyCount">QMetaObject::propertyCount</a>() for details.</p> <a name="property-meta-data"></a> <h3>Property Meta-Data</h3> <p>A property has a <a href="qmetaproperty.html#name">name</a>() and a <a href="qmetaproperty.html#type">type</a>(), as well as various attributes that specify its behavior: <a href="qmetaproperty.html#isReadable">isReadable</a>(), <a href="qmetaproperty.html#isWritable">isWritable</a>(), <a href="qmetaproperty.html#isDesignable">isDesignable</a>(), <a href="qmetaproperty.html#isScriptable">isScriptable</a>(), and <a href="qmetaproperty.html#isStored">isStored</a>().</p> <p>If the property is an enumeration, <a href="qmetaproperty.html#isEnumType">isEnumType</a>() returns true; if the property is an enumeration that is also a flag (i.e. its values can be combined using the OR operator), <a href="qmetaproperty.html#isEnumType">isEnumType</a>() and <a href="qmetaproperty.html#isFlagType">isFlagType</a>() both return true. The enumerator for these types is available from <a href="qmetaproperty.html#enumerator">enumerator</a>().</p> <p>The property's values are set and retrieved with <a href="qmetaproperty.html#read">read</a>(), <a href="qmetaproperty.html#write">write</a>(), and <a href="qmetaproperty.html#reset">reset</a>(); they can also be changed through <a href="qobject.html">QObject</a>'s set and get functions. See <a href="qobject.html#setProperty">QObject::setProperty</a>() and <a href="qobject.html#property">QObject::property</a>() for details.</p> <a name="copying-and-assignment"></a> <h3>Copying and Assignment</h3> <p>QMetaProperty objects can be copied by value. However, each copy will refer to the same underlying property meta-data.</p> </div> <p><b>See also </b><a href="qmetaobject.html">QMetaObject</a>, <a href="qmetaenum.html">QMetaEnum</a>, <a href="qmetamethod.html">QMetaMethod</a>, and <a href="properties.html#qt-s-property-system">Qt's Property System</a>.</p> <!-- @@@QMetaProperty --> <div class="func"> <h2>Member Function Documentation</h2> <!-- $$$enumerator[overload1]$$$enumerator --> <h3 class="fn"><a name="enumerator"></a><span class="type"><a href="qmetaenum.html">QMetaEnum</a></span> QMetaProperty::<span class="name">enumerator</span> () const</h3> <p>Returns the enumerator if this property's type is an enumerator type; otherwise the returned value is undefined.</p> <p><b>See also </b><a href="qmetaproperty.html#isEnumType">isEnumType</a>() and <a href="qmetaproperty.html#isFlagType">isFlagType</a>().</p> <!-- @@@enumerator --> <!-- $$$hasNotifySignal[overload1]$$$hasNotifySignal --> <h3 class="fn"><a name="hasNotifySignal"></a><span class="type">bool</span> QMetaProperty::<span class="name">hasNotifySignal</span> () const</h3> <p>Returns true if this property has a corresponding change notify signal; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#notifySignal">notifySignal</a>().</p> <!-- @@@hasNotifySignal --> <!-- $$$isConstant[overload1]$$$isConstant --> <h3 class="fn"><a name="isConstant"></a><span class="type">bool</span> QMetaProperty::<span class="name">isConstant</span> () const</h3> <p>Returns true if the property is constant; otherwise returns false.</p> <p>A property is constant if the <tt>Q_PROPERTY()</tt>'s <tt>CONSTANT</tt> attribute is set.</p> <p>This function was introduced in Qt 4.6.</p> <!-- @@@isConstant --> <!-- $$$isDesignable[overload1]$$$isDesignableconstQObject* --> <h3 class="fn"><a name="isDesignable"></a><span class="type">bool</span> QMetaProperty::<span class="name">isDesignable</span> ( const <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> = 0 ) const</h3> <p>Returns true if this property is designable for the given <i>object</i>; otherwise returns false.</p> <p>If no <i>object</i> is given, the function returns false if the <tt>Q_PROPERTY()</tt>'s <tt>DESIGNABLE</tt> attribute is false; otherwise returns true (if the attribute is true or is a function or expression).</p> <p><b>See also </b><a href="qmetaproperty.html#isScriptable">isScriptable</a>() and <a href="qmetaproperty.html#isStored">isStored</a>().</p> <!-- @@@isDesignable --> <!-- $$$isEnumType[overload1]$$$isEnumType --> <h3 class="fn"><a name="isEnumType"></a><span class="type">bool</span> QMetaProperty::<span class="name">isEnumType</span> () const</h3> <p>Returns true if the property's type is an enumeration value; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#enumerator">enumerator</a>() and <a href="qmetaproperty.html#isFlagType">isFlagType</a>().</p> <!-- @@@isEnumType --> <!-- $$$isFinal[overload1]$$$isFinal --> <h3 class="fn"><a name="isFinal"></a><span class="type">bool</span> QMetaProperty::<span class="name">isFinal</span> () const</h3> <p>Returns true if the property is final; otherwise returns false.</p> <p>A property is final if the <tt>Q_PROPERTY()</tt>'s <tt>FINAL</tt> attribute is set.</p> <p>This function was introduced in Qt 4.6.</p> <!-- @@@isFinal --> <!-- $$$isFlagType[overload1]$$$isFlagType --> <h3 class="fn"><a name="isFlagType"></a><span class="type">bool</span> QMetaProperty::<span class="name">isFlagType</span> () const</h3> <p>Returns true if the property's type is an enumeration value that is used as a flag; otherwise returns false.</p> <p>Flags can be combined using the OR operator. A flag type is implicitly also an enum type.</p> <p><b>See also </b><a href="qmetaproperty.html#isEnumType">isEnumType</a>(), <a href="qmetaproperty.html#enumerator">enumerator</a>(), and <a href="qmetaenum.html#isFlag">QMetaEnum::isFlag</a>().</p> <!-- @@@isFlagType --> <!-- $$$isReadable[overload1]$$$isReadable --> <h3 class="fn"><a name="isReadable"></a><span class="type">bool</span> QMetaProperty::<span class="name">isReadable</span> () const</h3> <p>Returns true if this property is readable; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#isWritable">isWritable</a>(), <a href="qmetaproperty.html#read">read</a>(), and <a href="qmetaproperty.html#isValid">isValid</a>().</p> <!-- @@@isReadable --> <!-- $$$isResettable[overload1]$$$isResettable --> <h3 class="fn"><a name="isResettable"></a><span class="type">bool</span> QMetaProperty::<span class="name">isResettable</span> () const</h3> <p>Returns true if this property can be reset to a default value; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#reset">reset</a>().</p> <!-- @@@isResettable --> <!-- $$$isScriptable[overload1]$$$isScriptableconstQObject* --> <h3 class="fn"><a name="isScriptable"></a><span class="type">bool</span> QMetaProperty::<span class="name">isScriptable</span> ( const <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> = 0 ) const</h3> <p>Returns true if the property is scriptable for the given <i>object</i>; otherwise returns false.</p> <p>If no <i>object</i> is given, the function returns false if the <tt>Q_PROPERTY()</tt>'s <tt>SCRIPTABLE</tt> attribute is false; otherwise returns true (if the attribute is true or is a function or expression).</p> <p><b>See also </b><a href="qmetaproperty.html#isDesignable">isDesignable</a>() and <a href="qmetaproperty.html#isStored">isStored</a>().</p> <!-- @@@isScriptable --> <!-- $$$isStored[overload1]$$$isStoredconstQObject* --> <h3 class="fn"><a name="isStored"></a><span class="type">bool</span> QMetaProperty::<span class="name">isStored</span> ( const <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> = 0 ) const</h3> <p>Returns true if the property is stored for <i>object</i>; otherwise returns false.</p> <p>If no <i>object</i> is given, the function returns false if the <tt>Q_PROPERTY()</tt>'s <tt>STORED</tt> attribute is false; otherwise returns true (if the attribute is true or is a function or expression).</p> <p><b>See also </b><a href="qmetaproperty.html#isDesignable">isDesignable</a>() and <a href="qmetaproperty.html#isScriptable">isScriptable</a>().</p> <!-- @@@isStored --> <!-- $$$isUser[overload1]$$$isUserconstQObject* --> <h3 class="fn"><a name="isUser"></a><span class="type">bool</span> QMetaProperty::<span class="name">isUser</span> ( const <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> = 0 ) const</h3> <p>Returns true if this property is designated as the <tt>USER</tt> property, i.e., the one that the user can edit for <i>object</i> or that is significant in some other way. Otherwise it returns false. e.g., the <tt>text</tt> property is the <tt>USER</tt> editable property of a <a href="qlineedit.html">QLineEdit</a>.</p> <p>If <i>object</i> is null, the function returns false if the <tt>Q_PROPERTY()</tt>'s <tt>USER</tt> attribute is false. Otherwise it returns true.</p> <p><b>See also </b><a href="qmetaobject.html#userProperty">QMetaObject::userProperty</a>(), <a href="qmetaproperty.html#isDesignable">isDesignable</a>(), and <a href="qmetaproperty.html#isScriptable">isScriptable</a>().</p> <!-- @@@isUser --> <!-- $$$isValid[overload1]$$$isValid --> <h3 class="fn"><a name="isValid"></a><span class="type">bool</span> QMetaProperty::<span class="name">isValid</span> () const</h3> <p>Returns true if this property is valid (readable); otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#isReadable">isReadable</a>().</p> <!-- @@@isValid --> <!-- $$$isWritable[overload1]$$$isWritable --> <h3 class="fn"><a name="isWritable"></a><span class="type">bool</span> QMetaProperty::<span class="name">isWritable</span> () const</h3> <p>Returns true if this property is writable; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#isReadable">isReadable</a>() and <a href="qmetaproperty.html#write">write</a>().</p> <!-- @@@isWritable --> <!-- $$$name[overload1]$$$name --> <h3 class="fn"><a name="name"></a>const <span class="type">char</span> * QMetaProperty::<span class="name">name</span> () const</h3> <p>Returns this property's name.</p> <p><b>See also </b><a href="qmetaproperty.html#type">type</a>() and <a href="qmetaproperty.html#typeName">typeName</a>().</p> <!-- @@@name --> <!-- $$$notifySignal[overload1]$$$notifySignal --> <h3 class="fn"><a name="notifySignal"></a><span class="type"><a href="qmetamethod.html">QMetaMethod</a></span> QMetaProperty::<span class="name">notifySignal</span> () const</h3> <p>Returns the <a href="qmetamethod.html">QMetaMethod</a> instance of the property change notifying signal if one was specified, otherwise returns an invalid <a href="qmetamethod.html">QMetaMethod</a>.</p> <p>This function was introduced in Qt 4.5.</p> <p><b>See also </b><a href="qmetaproperty.html#hasNotifySignal">hasNotifySignal</a>().</p> <!-- @@@notifySignal --> <!-- $$$notifySignalIndex[overload1]$$$notifySignalIndex --> <h3 class="fn"><a name="notifySignalIndex"></a><span class="type">int</span> QMetaProperty::<span class="name">notifySignalIndex</span> () const</h3> <p>Returns the index of the property change notifying signal if one was specified, otherwise returns -1.</p> <p>This function was introduced in Qt 4.6.</p> <p><b>See also </b><a href="qmetaproperty.html#hasNotifySignal">hasNotifySignal</a>().</p> <!-- @@@notifySignalIndex --> <!-- $$$propertyIndex[overload1]$$$propertyIndex --> <h3 class="fn"><a name="propertyIndex"></a><span class="type">int</span> QMetaProperty::<span class="name">propertyIndex</span> () const</h3> <p>Returns this property's index.</p> <p>This function was introduced in Qt 4.6.</p> <!-- @@@propertyIndex --> <!-- $$$read[overload1]$$$readconstQObject* --> <h3 class="fn"><a name="read"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QMetaProperty::<span class="name">read</span> ( const <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> ) const</h3> <p>Reads the property's value from the given <i>object</i>. Returns the value if it was able to read it; otherwise returns an invalid variant.</p> <p><b>See also </b><a href="qmetaproperty.html#write">write</a>(), <a href="qmetaproperty.html#reset">reset</a>(), and <a href="qmetaproperty.html#isReadable">isReadable</a>().</p> <!-- @@@read --> <!-- $$$reset[overload1]$$$resetQObject* --> <h3 class="fn"><a name="reset"></a><span class="type">bool</span> QMetaProperty::<span class="name">reset</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i> ) const</h3> <p>Resets the property for the given <i>object</i> with a reset method. Returns true if the reset worked; otherwise returns false.</p> <p>Reset methods are optional; only a few properties support them.</p> <p><b>See also </b><a href="qmetaproperty.html#read">read</a>() and <a href="qmetaproperty.html#write">write</a>().</p> <!-- @@@reset --> <!-- $$$type[overload1]$$$type --> <h3 class="fn"><a name="type"></a><span class="type"><a href="qvariant.html#Type-enum">QVariant::Type</a></span> QMetaProperty::<span class="name">type</span> () const</h3> <p>Returns this property's type. The return value is one of the values of the <a href="qvariant.html#Type-enum">QVariant::Type</a> enumeration.</p> <p><b>See also </b><a href="qmetaproperty.html#userType">userType</a>(), <a href="qmetaproperty.html#typeName">typeName</a>(), and <a href="qmetaproperty.html#name">name</a>().</p> <!-- @@@type --> <!-- $$$typeName[overload1]$$$typeName --> <h3 class="fn"><a name="typeName"></a>const <span class="type">char</span> * QMetaProperty::<span class="name">typeName</span> () const</h3> <p>Returns the name of this property's type.</p> <p><b>See also </b><a href="qmetaproperty.html#type">type</a>() and <a href="qmetaproperty.html#name">name</a>().</p> <!-- @@@typeName --> <!-- $$$userType[overload1]$$$userType --> <h3 class="fn"><a name="userType"></a><span class="type">int</span> QMetaProperty::<span class="name">userType</span> () const</h3> <p>Returns this property's user type. The return value is one of the values that are registered with <a href="qmetatype.html">QMetaType</a>, or 0 if the type is not registered.</p> <p>This function was introduced in Qt 4.2.</p> <p><b>See also </b><a href="qmetaproperty.html#type">type</a>(), <a href="qmetatype.html">QMetaType</a>, and <a href="qmetaproperty.html#typeName">typeName</a>().</p> <!-- @@@userType --> <!-- $$$write[overload1]$$$writeQObject*constQVariant& --> <h3 class="fn"><a name="write"></a><span class="type">bool</span> QMetaProperty::<span class="name">write</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i> ) const</h3> <p>Writes <i>value</i> as the property's value to the given <i>object</i>. Returns true if the write succeeded; otherwise returns false.</p> <p><b>See also </b><a href="qmetaproperty.html#read">read</a>(), <a href="qmetaproperty.html#reset">reset</a>(), and <a href="qmetaproperty.html#isWritable">isWritable</a>().</p> <!-- @@@write --> </div> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Qt and respective logos are trademarks of The Qt Company Ltd in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>