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<h1 class="title">QDeclarativeProperty Class Reference</h1>
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<!-- $$$QDeclarativeProperty-brief -->
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<p>The QDeclarativeProperty class abstracts accessing properties on objects created from QML. <a href="#details">More...</a></p>
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<!-- @@@QDeclarativeProperty -->
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<pre class="cpp"> <span class="preprocessor">#include <QDeclarativeProperty></span></pre><p>This class was introduced in Qt 4.7.</p>
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<a name="public-types"></a>
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<h2>Public Types</h2>
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<table class="alignedsummary">
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<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#PropertyTypeCategory-enum">PropertyTypeCategory</a></b> { InvalidCategory, List, Object, Normal }</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> enum </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#Type-enum">Type</a></b> { Invalid, Property, SignalProperty }</td></tr>
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</table>
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<a name="public-functions"></a>
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<h2>Public Functions</h2>
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<table class="alignedsummary">
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty">QDeclarativeProperty</a></b> ()</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-2">QDeclarativeProperty</a></b> ( QObject * <i>obj</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-3">QDeclarativeProperty</a></b> ( QObject * <i>obj</i>, QDeclarativeContext * <i>ctxt</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-4">QDeclarativeProperty</a></b> ( QObject * <i>obj</i>, QDeclarativeEngine * <i>engine</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-5">QDeclarativeProperty</a></b> ( QObject * <i>obj</i>, const QString & <i>name</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-6">QDeclarativeProperty</a></b> ( QObject * <i>obj</i>, const QString & <i>name</i>, QDeclarativeContext * <i>ctxt</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-7">QDeclarativeProperty</a></b> ( QObject * <i>obj</i>, const QString & <i>name</i>, QDeclarativeEngine * <i>engine</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#QDeclarativeProperty-8">QDeclarativeProperty</a></b> ( const QDeclarativeProperty & <i>other</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#connectNotifySignal">connectNotifySignal</a></b> ( QObject * <i>dest</i>, const char * <i>slot</i> ) const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#connectNotifySignal-2">connectNotifySignal</a></b> ( QObject * <i>dest</i>, int <i>method</i> ) const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#hasNotifySignal">hasNotifySignal</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#index">index</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isDesignable">isDesignable</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isProperty">isProperty</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isResettable">isResettable</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isSignalProperty">isSignalProperty</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isValid">isValid</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#isWritable">isWritable</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QMetaMethod </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#method">method</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QString </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#name">name</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#needsNotifySignal">needsNotifySignal</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QObject * </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#object">object</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QMetaProperty </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#property">property</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#propertyType">propertyType</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> PropertyTypeCategory </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#propertyTypeCategory">propertyTypeCategory</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> const char * </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#propertyTypeName">propertyTypeName</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#read">read</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#reset">reset</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> Type </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#type">type</a></b> () const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#write">write</a></b> ( const QVariant & <i>value</i> ) const</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QDeclarativeProperty & </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#operator-eq">operator=</a></b> ( const QDeclarativeProperty & <i>other</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#operator-eq-eq">operator==</a></b> ( const QDeclarativeProperty & <i>other</i> ) const</td></tr>
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</table>
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<a name="static-public-members"></a>
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<h2>Static Public Members</h2>
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<table class="alignedsummary">
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<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#read-2">read</a></b> ( QObject * <i>object</i>, const QString & <i>name</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#read-3">read</a></b> ( QObject * <i>object</i>, const QString & <i>name</i>, QDeclarativeContext * <i>ctxt</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> QVariant </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#read-4">read</a></b> ( QObject * <i>object</i>, const QString & <i>name</i>, QDeclarativeEngine * <i>engine</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#write-2">write</a></b> ( QObject * <i>object</i>, const QString & <i>name</i>, const QVariant & <i>value</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#write-3">write</a></b> ( QObject * <i>object</i>, const QString & <i>name</i>, const QVariant & <i>value</i>, QDeclarativeContext * <i>ctxt</i> )</td></tr>
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<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="qdeclarativeproperty.html#write-4">write</a></b> ( QObject * <i>object</i>, const QString & <i>name</i>, const QVariant & <i>value</i>, QDeclarativeEngine * <i>engine</i> )</td></tr>
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</table>
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<a name="details"></a>
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<!-- $$$QDeclarativeProperty-description -->
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<div class="descr">
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<h2>Detailed Description</h2>
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<p>The QDeclarativeProperty class abstracts accessing properties on objects created from QML.</p>
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<p>As QML uses Qt's meta-type system all of the existing <a href="qmetaobject.html">QMetaObject</a> classes can be used to introspect and interact with objects created by QML. However, some of the new features provided by QML - such as type safety and attached properties - are most easily used through the QDeclarativeProperty class that simplifies some of their natural complexity.</p>
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<p>Unlike <a href="qmetaproperty.html">QMetaProperty</a> which represents a property on a class type, QDeclarativeProperty encapsulates a property on a specific object instance. To read a property's value, programmers create a QDeclarativeProperty instance and call the <a href="qdeclarativeproperty.html#read">read</a>() method. Likewise to write a property value the <a href="qdeclarativeproperty.html#write">write</a>() method is used.</p>
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<p>For example, for the following QML code:</p>
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<pre class="qml"> <span class="comment">// MyItem.qml</span>
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import QtQuick 1.0
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<span class="type"><a href="qml-text.html">Text</a></span> { <span class="name">text</span>: <span class="string">"A bit of text"</span> }</pre>
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<p>The <a href="qml-text.html">Text</a> object's properties could be accessed using QDeclarativeProperty, like this:</p>
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<pre class="cpp"> <span class="preprocessor">#include <QDeclarativeProperty></span>
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<span class="preprocessor">#include <QGraphicsObject></span>
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<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
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<span class="type"><a href="qdeclarativeview.html">QDeclarativeView</a></span> view(<span class="type"><a href="qurl.html">QUrl</a></span><span class="operator">::</span>fromLocalFile(<span class="string">"MyItem.qml"</span>));
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<span class="type">QDeclarativeProperty</span> <a href="qdeclarativeproperty.html#property">property</a>(view<span class="operator">.</span>rootObject()<span class="operator">,</span> <span class="string">"font.pixelSize"</span>);
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<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Current pixel size:"</span> <span class="operator"><</span><span class="operator"><</span> property<span class="operator">.</span><a href="qdeclarativeproperty.html#read">read</a>()<span class="operator">.</span>toInt();
|
|
property<span class="operator">.</span><a href="qdeclarativeproperty.html#write">write</a>(<span class="number">24</span>);
|
|
<a href="qtglobal.html#qWarning">qWarning</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"Pixel size should now be 24:"</span> <span class="operator"><</span><span class="operator"><</span> property<span class="operator">.</span><a href="qdeclarativeproperty.html#read">read</a>()<span class="operator">.</span>toInt();</pre>
|
|
</div>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<div class="types">
|
|
<h2>Member Type Documentation</h2>
|
|
<!-- $$$PropertyTypeCategory$$$InvalidCategory$$$List$$$Object$$$Normal -->
|
|
<h3 class="fn"><a name="PropertyTypeCategory-enum"></a>enum QDeclarativeProperty::<span class="name">PropertyTypeCategory</span></h3>
|
|
<p>This enum specifies a category of QML property.</p>
|
|
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::InvalidCategory</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">The property is invalid, or is a signal property.</td></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::List</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">The property is a <a href="qdeclarativelistproperty.html">QDeclarativeListProperty</a> list property</td></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::Object</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">The property is a <a href="qobject.html">QObject</a> derived type pointer</td></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::Normal</tt></td><td class="topAlign"><tt>3</tt></td><td class="topAlign">The property is a normal value property.</td></tr>
|
|
</table>
|
|
<!-- @@@PropertyTypeCategory -->
|
|
<!-- $$$Type$$$Invalid$$$Property$$$SignalProperty -->
|
|
<h3 class="fn"><a name="Type-enum"></a>enum QDeclarativeProperty::<span class="name">Type</span></h3>
|
|
<p>This enum specifies a type of QML property.</p>
|
|
<table class="valuelist"><tr valign="top" class="odd"><th class="tblConst">Constant</th><th class="tblval">Value</th><th class="tbldscr">Description</th></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::Invalid</tt></td><td class="topAlign"><tt>0</tt></td><td class="topAlign">The property is invalid.</td></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::Property</tt></td><td class="topAlign"><tt>1</tt></td><td class="topAlign">The property is a regular Qt property.</td></tr>
|
|
<tr><td class="topAlign"><tt>QDeclarativeProperty::SignalProperty</tt></td><td class="topAlign"><tt>2</tt></td><td class="topAlign">The property is a signal property.</td></tr>
|
|
</table>
|
|
<!-- @@@Type -->
|
|
</div>
|
|
<div class="func">
|
|
<h2>Member Function Documentation</h2>
|
|
<!-- $$$QDeclarativeProperty[overload1]$$$QDeclarativeProperty -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ()</h3>
|
|
<p>Create an invalid <a href="qdeclarativeproperty.html">QDeclarativeProperty</a>.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject* -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-2"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the default property of <i>obj</i>. If there is no default property, an invalid <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> will be created.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject*QDeclarativeContext* -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-3"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i>, <span class="type"><a href="qdeclarativecontext.html">QDeclarativeContext</a></span> * <i>ctxt</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the default property of <i>obj</i> using the <a href="qdeclarativecontext.html">context</a> <i>ctxt</i>. If there is no default property, an invalid <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> will be created.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject*QDeclarativeEngine* -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-4"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i>, <span class="type"><a href="qdeclarativeengine.html">QDeclarativeEngine</a></span> * <i>engine</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the default property of <i>obj</i> using the environment for instantiating QML components that is provided by <i>engine</i>. If there is no default property, an invalid <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> will be created.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject*constQString& -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-5"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the property <i>name</i> of <i>obj</i>.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject*constQString&QDeclarativeContext* -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-6"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, <span class="type"><a href="qdeclarativecontext.html">QDeclarativeContext</a></span> * <i>ctxt</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the property <i>name</i> of <i>obj</i> using the <a href="qdeclarativecontext.html">context</a> <i>ctxt</i>.</p>
|
|
<p>Creating a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> without a context will render some properties - like attached properties - inaccessible.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyQObject*constQString&QDeclarativeEngine* -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-7"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>obj</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, <span class="type"><a href="qdeclarativeengine.html">QDeclarativeEngine</a></span> * <i>engine</i> )</h3>
|
|
<p>Creates a <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> for the property <i>name</i> of <i>obj</i> using the environment for instantiating QML components that is provided by <i>engine</i>.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$QDeclarativeProperty$$$QDeclarativePropertyconstQDeclarativeProperty& -->
|
|
<h3 class="fn"><a name="QDeclarativeProperty-8"></a>QDeclarativeProperty::<span class="name">QDeclarativeProperty</span> ( const <span class="type">QDeclarativeProperty</span> & <i>other</i> )</h3>
|
|
<p>Create a copy of <i>other</i>.</p>
|
|
<!-- @@@QDeclarativeProperty -->
|
|
<!-- $$$connectNotifySignal[overload1]$$$connectNotifySignalQObject*constchar* -->
|
|
<h3 class="fn"><a name="connectNotifySignal"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">connectNotifySignal</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>dest</i>, const <span class="type">char</span> * <i>slot</i> ) const</h3>
|
|
<p>Connects the property's change notifier signal to the specified <i>slot</i> of the <i>dest</i> object and returns true. Returns false if this metaproperty does not represent a regular Qt property or if it has no change notifier signal, or if the <i>dest</i> object does not have the specified <i>slot</i>.</p>
|
|
<!-- @@@connectNotifySignal -->
|
|
<!-- $$$connectNotifySignal$$$connectNotifySignalQObject*int -->
|
|
<h3 class="fn"><a name="connectNotifySignal-2"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">connectNotifySignal</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>dest</i>, <span class="type">int</span> <i>method</i> ) const</h3>
|
|
<p>Connects the property's change notifier signal to the specified <i>method</i> of the <i>dest</i> object and returns true. Returns false if this metaproperty does not represent a regular Qt property or if it has no change notifier signal, or if the <i>dest</i> object does not have the specified <i>method</i>.</p>
|
|
<!-- @@@connectNotifySignal -->
|
|
<!-- $$$hasNotifySignal[overload1]$$$hasNotifySignal -->
|
|
<h3 class="fn"><a name="hasNotifySignal"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">hasNotifySignal</span> () const</h3>
|
|
<p>Returns true if the property has a change notifier signal, otherwise false.</p>
|
|
<!-- @@@hasNotifySignal -->
|
|
<!-- $$$index[overload1]$$$index -->
|
|
<h3 class="fn"><a name="index"></a><span class="type">int</span> QDeclarativeProperty::<span class="name">index</span> () const</h3>
|
|
<p>Return the Qt metaobject index of the property.</p>
|
|
<!-- @@@index -->
|
|
<!-- $$$isDesignable[overload1]$$$isDesignable -->
|
|
<h3 class="fn"><a name="isDesignable"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isDesignable</span> () const</h3>
|
|
<p>Returns true if the property is designable, otherwise false.</p>
|
|
<!-- @@@isDesignable -->
|
|
<!-- $$$isProperty[overload1]$$$isProperty -->
|
|
<h3 class="fn"><a name="isProperty"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isProperty</span> () const</h3>
|
|
<p>Returns true if this <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> represents a regular Qt property.</p>
|
|
<!-- @@@isProperty -->
|
|
<!-- $$$isResettable[overload1]$$$isResettable -->
|
|
<h3 class="fn"><a name="isResettable"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isResettable</span> () const</h3>
|
|
<p>Returns true if the property is resettable, otherwise false.</p>
|
|
<!-- @@@isResettable -->
|
|
<!-- $$$isSignalProperty[overload1]$$$isSignalProperty -->
|
|
<h3 class="fn"><a name="isSignalProperty"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isSignalProperty</span> () const</h3>
|
|
<p>Returns true if this <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> represents a QML signal property.</p>
|
|
<!-- @@@isSignalProperty -->
|
|
<!-- $$$isValid[overload1]$$$isValid -->
|
|
<h3 class="fn"><a name="isValid"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isValid</span> () const</h3>
|
|
<p>Returns true if the <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> refers to a valid property, otherwise false.</p>
|
|
<!-- @@@isValid -->
|
|
<!-- $$$isWritable[overload1]$$$isWritable -->
|
|
<h3 class="fn"><a name="isWritable"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">isWritable</span> () const</h3>
|
|
<p>Returns true if the property is writable, otherwise false.</p>
|
|
<!-- @@@isWritable -->
|
|
<!-- $$$method[overload1]$$$method -->
|
|
<h3 class="fn"><a name="method"></a><span class="type"><a href="qmetamethod.html">QMetaMethod</a></span> QDeclarativeProperty::<span class="name">method</span> () const</h3>
|
|
<p>Return the <a href="qmetamethod.html">QMetaMethod</a> for this property if it is a <a href="qdeclarativeproperty.html#Type-enum">SignalProperty</a>, otherwise returns an invalid <a href="qmetamethod.html">QMetaMethod</a>.</p>
|
|
<!-- @@@method -->
|
|
<!-- $$$name[overload1]$$$name -->
|
|
<h3 class="fn"><a name="name"></a><span class="type"><a href="qstring.html">QString</a></span> QDeclarativeProperty::<span class="name">name</span> () const</h3>
|
|
<p>Return the name of this QML property.</p>
|
|
<!-- @@@name -->
|
|
<!-- $$$needsNotifySignal[overload1]$$$needsNotifySignal -->
|
|
<h3 class="fn"><a name="needsNotifySignal"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">needsNotifySignal</span> () const</h3>
|
|
<p>Returns true if the property needs a change notifier signal for bindings to remain upto date, false otherwise.</p>
|
|
<p>Some properties, such as attached properties or those whose value never changes, do not require a change notifier.</p>
|
|
<!-- @@@needsNotifySignal -->
|
|
<!-- $$$object[overload1]$$$object -->
|
|
<h3 class="fn"><a name="object"></a><span class="type"><a href="qobject.html">QObject</a></span> * QDeclarativeProperty::<span class="name">object</span> () const</h3>
|
|
<p>Returns the <a href="qdeclarativeproperty.html">QDeclarativeProperty</a>'s <a href="qobject.html">QObject</a>.</p>
|
|
<!-- @@@object -->
|
|
<!-- $$$property[overload1]$$$property -->
|
|
<h3 class="fn"><a name="property"></a><span class="type"><a href="qmetaproperty.html">QMetaProperty</a></span> QDeclarativeProperty::<span class="name">property</span> () const</h3>
|
|
<p>Returns the <a href="qmetaproperty.html">Qt property</a> associated with this QML property.</p>
|
|
<!-- @@@property -->
|
|
<!-- $$$propertyType[overload1]$$$propertyType -->
|
|
<h3 class="fn"><a name="propertyType"></a><span class="type">int</span> QDeclarativeProperty::<span class="name">propertyType</span> () const</h3>
|
|
<p>Returns the <a href="qvariant.html">QVariant</a> type of the property, or <a href="qvariant.html#Type-enum">QVariant::Invalid</a> if the property has no <a href="qvariant.html">QVariant</a> type.</p>
|
|
<!-- @@@propertyType -->
|
|
<!-- $$$propertyTypeCategory[overload1]$$$propertyTypeCategory -->
|
|
<h3 class="fn"><a name="propertyTypeCategory"></a><span class="type"><a href="qdeclarativeproperty.html#PropertyTypeCategory-enum">PropertyTypeCategory</a></span> QDeclarativeProperty::<span class="name">propertyTypeCategory</span> () const</h3>
|
|
<p>Returns the property category.</p>
|
|
<!-- @@@propertyTypeCategory -->
|
|
<!-- $$$propertyTypeName[overload1]$$$propertyTypeName -->
|
|
<h3 class="fn"><a name="propertyTypeName"></a>const <span class="type">char</span> * QDeclarativeProperty::<span class="name">propertyTypeName</span> () const</h3>
|
|
<p>Returns the type name of the property, or 0 if the property has no type name.</p>
|
|
<!-- @@@propertyTypeName -->
|
|
<!-- $$$read[overload1]$$$read -->
|
|
<h3 class="fn"><a name="read"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QDeclarativeProperty::<span class="name">read</span> () const</h3>
|
|
<p>Returns the property value.</p>
|
|
<!-- @@@read -->
|
|
<!-- $$$read$$$readQObject*constQString& -->
|
|
<h3 class="fn"><a name="read-2"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QDeclarativeProperty::<span class="name">read</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i> )<tt> [static]</tt></h3>
|
|
<p>Return the <i>name</i> property value of <i>object</i>. This method is equivalent to:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name);
|
|
p<span class="operator">.</span><a href="qdeclarativeproperty.html#read">read</a>();</pre>
|
|
<!-- @@@read -->
|
|
<!-- $$$read$$$readQObject*constQString&QDeclarativeContext* -->
|
|
<h3 class="fn"><a name="read-3"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QDeclarativeProperty::<span class="name">read</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, <span class="type"><a href="qdeclarativecontext.html">QDeclarativeContext</a></span> * <i>ctxt</i> )<tt> [static]</tt></h3>
|
|
<p>Return the <i>name</i> property value of <i>object</i> using the <a href="qdeclarativecontext.html">context</a> <i>ctxt</i>. This method is equivalent to:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name<span class="operator">,</span> context);
|
|
p<span class="operator">.</span><a href="qdeclarativeproperty.html#read">read</a>();</pre>
|
|
<!-- @@@read -->
|
|
<!-- $$$read$$$readQObject*constQString&QDeclarativeEngine* -->
|
|
<h3 class="fn"><a name="read-4"></a><span class="type"><a href="qvariant.html">QVariant</a></span> QDeclarativeProperty::<span class="name">read</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, <span class="type"><a href="qdeclarativeengine.html">QDeclarativeEngine</a></span> * <i>engine</i> )<tt> [static]</tt></h3>
|
|
<p>Return the <i>name</i> property value of <i>object</i> using the environment for instantiating QML components that is provided by <i>engine</i>. . This method is equivalent to:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name<span class="operator">,</span> engine);
|
|
p<span class="operator">.</span><a href="qdeclarativeproperty.html#read">read</a>();</pre>
|
|
<!-- @@@read -->
|
|
<!-- $$$reset[overload1]$$$reset -->
|
|
<h3 class="fn"><a name="reset"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">reset</span> () const</h3>
|
|
<p>Resets the property and returns true if the property is resettable. If the property is not resettable, nothing happens and false is returned.</p>
|
|
<!-- @@@reset -->
|
|
<!-- $$$type[overload1]$$$type -->
|
|
<h3 class="fn"><a name="type"></a><span class="type"><a href="qdeclarativeproperty.html#Type-enum">Type</a></span> QDeclarativeProperty::<span class="name">type</span> () const</h3>
|
|
<p>Returns the type of the property.</p>
|
|
<!-- @@@type -->
|
|
<!-- $$$write[overload1]$$$writeconstQVariant& -->
|
|
<h3 class="fn"><a name="write"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">write</span> ( const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i> ) const</h3>
|
|
<p>Sets the property value to <i>value</i> and returns true. Returns false if the property can't be set because the <i>value</i> is the wrong type, for example.</p>
|
|
<!-- @@@write -->
|
|
<!-- $$$write$$$writeQObject*constQString&constQVariant& -->
|
|
<h3 class="fn"><a name="write-2"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">write</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i> )<tt> [static]</tt></h3>
|
|
<p>Writes <i>value</i> to the <i>name</i> property of <i>object</i>. This method is equivalent to:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name);
|
|
p<span class="operator">.</span><a href="qdeclarativeproperty.html#write">write</a>(value);</pre>
|
|
<!-- @@@write -->
|
|
<!-- $$$write$$$writeQObject*constQString&constQVariant&QDeclarativeContext* -->
|
|
<h3 class="fn"><a name="write-3"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">write</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i>, <span class="type"><a href="qdeclarativecontext.html">QDeclarativeContext</a></span> * <i>ctxt</i> )<tt> [static]</tt></h3>
|
|
<p>Writes <i>value</i> to the <i>name</i> property of <i>object</i> using the <a href="qdeclarativecontext.html">context</a> <i>ctxt</i>. This method is equivalent to:</p>
|
|
<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name<span class="operator">,</span> ctxt);
|
|
p<span class="operator">.</span><a href="qdeclarativeproperty.html#write">write</a>(value);</pre>
|
|
<!-- @@@write -->
|
|
<!-- $$$write$$$writeQObject*constQString&constQVariant&QDeclarativeEngine* -->
|
|
<h3 class="fn"><a name="write-4"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">write</span> ( <span class="type"><a href="qobject.html">QObject</a></span> * <i>object</i>, const <span class="type"><a href="qstring.html">QString</a></span> & <i>name</i>, const <span class="type"><a href="qvariant.html">QVariant</a></span> & <i>value</i>, <span class="type"><a href="qdeclarativeengine.html">QDeclarativeEngine</a></span> * <i>engine</i> )<tt> [static]</tt></h3>
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<p>Writes <i>value</i> to the <i>name</i> property of <i>object</i> using the environment for instantiating QML components that is provided by <i>engine</i>. This method is equivalent to:</p>
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<pre class="cpp"> <span class="type"><a href="qdeclarativeproperty.html">QDeclarativeProperty</a></span> p(object<span class="operator">,</span> name<span class="operator">,</span> engine);
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p<span class="operator">.</span><a href="qdeclarativeproperty.html#write">write</a>(value);</pre>
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<!-- @@@write -->
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<!-- $$$operator=[overload1]$$$operator=constQDeclarativeProperty& -->
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<h3 class="fn"><a name="operator-eq"></a><span class="type">QDeclarativeProperty</span> & QDeclarativeProperty::<span class="name">operator=</span> ( const <span class="type">QDeclarativeProperty</span> & <i>other</i> )</h3>
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<p>Assign <i>other</i> to this <a href="qdeclarativeproperty.html">QDeclarativeProperty</a>.</p>
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<!-- @@@operator= -->
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<!-- $$$operator==[overload1]$$$operator==constQDeclarativeProperty& -->
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<h3 class="fn"><a name="operator-eq-eq"></a><span class="type">bool</span> QDeclarativeProperty::<span class="name">operator==</span> ( const <span class="type">QDeclarativeProperty</span> & <i>other</i> ) const</h3>
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<p>Returns true if <i>other</i> and this <a href="qdeclarativeproperty.html">QDeclarativeProperty</a> represent the same property.</p>
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<!-- @@@operator== -->
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