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<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 >QSignalMapper</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>
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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="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QSignalMapper Class</h1>
<!-- $$$QSignalMapper-brief -->
<p>The <a href="qsignalmapper.html">QSignalMapper</a> class bundles signals from identifiable senders. <a href="#details">More...</a></p>
<!-- @@@QSignalMapper -->
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QSignalMapper></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"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qobject.html">QObject</a></td></tr></table></div><p><b>This class is obsolete.</b> It is provided to keep old source code working. We strongly advise against using it in new code.</p>
<ul>
<li><a href="qsignalmapper-members.html">List of all members, including inherited members</a></li>
<li><a href="qsignalmapper-obsolete.html">Obsolete members</a></li>
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<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="qsignalmapper.html#QSignalMapper">QSignalMapper</a></b>(QObject *<i>parent</i> = nullptr)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#dtor.QSignalMapper">~QSignalMapper</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QObject *</td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapping">mapping</a></b>(int <i>id</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QObject *</td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapping-1">mapping</a></b>(const QString &<i>id</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QObject *</td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapping-2">mapping</a></b>(QWidget *<i>widget</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QObject *</td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapping-3">mapping</a></b>(QObject *<i>object</i>) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#removeMappings">removeMappings</a></b>(QObject *<i>sender</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#setMapping">setMapping</a></b>(QObject *<i>sender</i>, int <i>id</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#setMapping-1">setMapping</a></b>(QObject *<i>sender</i>, const QString &<i>text</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#setMapping-2">setMapping</a></b>(QObject *<i>sender</i>, QWidget *<i>widget</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#setMapping-3">setMapping</a></b>(QObject *<i>sender</i>, QObject *<i>object</i>)</td></tr>
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<li class="fn">32 public functions inherited from <a href="qobject.html#public-functions">QObject</a></li>
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<a name="public-slots"></a>
<h2 id="public-slots">Public Slots</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#map">map</a></b>()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#map-1">map</a></b>(QObject *<i>sender</i>)</td></tr>
</table></div>
<ul>
<li class="fn">1 public slot inherited from <a href="qobject.html#public-slots">QObject</a></li>
</ul>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapped">mapped</a></b>(int <i>i</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapped-1">mapped</a></b>(const QString &<i>text</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapped-2">mapped</a></b>(QWidget *<i>widget</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#mapped-3">mapped</a></b>(QObject *<i>object</i>)</td></tr>
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<li class="fn">2 signals inherited from <a href="qobject.html#signals">QObject</a></li>
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<a name="static-public-members"></a>
<h2 id="static-public-members">Static Public Members</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qsignalmapper.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
</table></div>
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<li class="fn">10 static public members inherited from <a href="qobject.html#static-public-members">QObject</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">1 property inherited from <a href="qobject.html#properties">QObject</a></li>
<li class="fn">9 protected functions inherited from <a href="qobject.html#protected-functions">QObject</a></li>
</ul>
<a name="details"></a>
<!-- $$$QSignalMapper-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>The <a href="qsignalmapper.html">QSignalMapper</a> class bundles signals from identifiable senders.</p>
<p>This class collects a set of parameterless signals, and re-emits them with integer, string or widget parameters corresponding to the object that sent the signal.</p>
<p>The class supports the mapping of particular strings or integers with particular objects using <a href="qsignalmapper.html#setMapping">setMapping</a>(). The objects' signals can then be connected to the <a href="qsignalmapper.html#map">map</a>() slot which will emit the <a href="qsignalmapper.html#mapped">mapped</a>() signal with the string or integer associated with the original signalling object. Mappings can be removed later using <a href="qsignalmapper.html#removeMappings">removeMappings</a>().</p>
<p>Example: Suppose we want to create a custom widget that contains a group of buttons (like a tool palette). One approach is to connect each button's <code>clicked()</code> signal to its own custom slot; but in this example we want to connect all the buttons to a single slot and parameterize the slot by the button that was clicked.</p>
<p>Here's the definition of a simple custom widget that has a single signal, <code>clicked()</code>, which is emitted with the text of the button that was clicked:</p>
<pre class="cpp">
<span class="keyword">class</span> ButtonWidget : <span class="keyword">public</span> <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span>
{
Q_OBJECT
<span class="keyword">public</span>:
ButtonWidget(<span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>texts<span class="operator">,</span> <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent <span class="operator">=</span> <span class="number">0</span>);
<span class="keyword">signals</span>:
<span class="type">void</span> clicked(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>text);
<span class="keyword">private</span>:
<span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span> <span class="operator">*</span>signalMapper;
};
</pre>
<p>The only function that we need to implement is the constructor:</p>
<pre class="cpp">
ButtonWidget<span class="operator">::</span>ButtonWidget(<span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>texts<span class="operator">,</span> <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span>(parent)
{
signalMapper <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span>(<span class="keyword">this</span>);
<span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>gridLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span>;
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> texts<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(texts<span class="operator">[</span>i<span class="operator">]</span>);
connect(button<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> signalMapper<span class="operator">,</span> SLOT(map()));
signalMapper<span class="operator">-</span><span class="operator">></span>setMapping(button<span class="operator">,</span> texts<span class="operator">[</span>i<span class="operator">]</span>);
gridLayout<span class="operator">-</span><span class="operator">></span>addWidget(button<span class="operator">,</span> i <span class="operator">/</span> <span class="number">3</span><span class="operator">,</span> i <span class="operator">%</span> <span class="number">3</span>);
}
connect(signalMapper<span class="operator">,</span> SIGNAL(mapped(<span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
<span class="keyword">this</span><span class="operator">,</span> SIGNAL(clicked(<span class="type"><a href="qstring.html">QString</a></span>)));
setLayout(gridLayout);
}
</pre>
<p>A list of texts is passed to the constructor. A signal mapper is constructed and for each text in the list a <a href="../qtwidgets/qpushbutton.html">QPushButton</a> is created. We connect each button's <code>clicked()</code> signal to the signal mapper's <a href="qsignalmapper.html#map">map</a>() slot, and create a mapping in the signal mapper from each button to the button's text. Finally we connect the signal mapper's <a href="qsignalmapper.html#mapped">mapped</a>() signal to the custom widget's <code>clicked()</code> signal. When the user clicks a button, the custom widget will emit a single <code>clicked()</code> signal whose argument is the text of the button the user clicked.</p>
<p>This class was mostly useful before lambda functions could be used as slots. The example above can be rewritten simpler without <a href="qsignalmapper.html">QSignalMapper</a> by connecting to a lambda function.</p>
<pre class="cpp">
ButtonWidget<span class="operator">::</span>ButtonWidget(<span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> <span class="operator">&</span>texts<span class="operator">,</span> <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span>(parent)
{
<span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span> <span class="operator">*</span>gridLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qgridlayout.html">QGridLayout</a></span>;
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> texts<span class="operator">.</span>size(); <span class="operator">+</span><span class="operator">+</span>i) {
<span class="type"><a href="qstring.html">QString</a></span> text <span class="operator">=</span> texts<span class="operator">[</span>i<span class="operator">]</span>;
<span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span> <span class="operator">*</span>button <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span>(text);
connect(button<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="../qtwidgets/qpushbutton.html">QPushButton</a></span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="operator">[</span><span class="operator">=</span><span class="operator">]</span> { clicked(text); });
gridLayout<span class="operator">-</span><span class="operator">></span>addWidget(button<span class="operator">,</span> i <span class="operator">/</span> <span class="number">3</span><span class="operator">,</span> i <span class="operator">%</span> <span class="number">3</span>);
}
setLayout(gridLayout);
}
</pre>
</div>
<p><b>See also </b><a href="qobject.html">QObject</a>, <a href="../qtwidgets/qbuttongroup.html">QButtonGroup</a>, and <a href="../qtwidgets/qactiongroup.html">QActionGroup</a>.</p>
<!-- @@@QSignalMapper -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QSignalMapper[overload1]$$$QSignalMapperQObject* -->
<h3 class="fn" id="QSignalMapper"><a name="QSignalMapper"></a>QSignalMapper::<span class="name">QSignalMapper</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>parent</i> = nullptr)</h3>
<p>Constructs a <a href="qsignalmapper.html" class="obsolete">QSignalMapper</a> with parent <i>parent</i>.</p>
<!-- @@@QSignalMapper -->
<!-- $$$~QSignalMapper[overload1]$$$~QSignalMapper -->
<h3 class="fn" id="dtor.QSignalMapper"><a name="dtor.QSignalMapper"></a><code>[virtual] </code>QSignalMapper::<span class="name">~QSignalMapper</span>()</h3>
<p>Destroys the <a href="qsignalmapper.html" class="obsolete">QSignalMapper</a>.</p>
<!-- @@@~QSignalMapper -->
<!-- $$$map[overload1]$$$map -->
<h3 class="fn" id="map"><a name="map"></a><code>[slot] </code><span class="type">void</span> QSignalMapper::<span class="name">map</span>()</h3>
<p>This slot emits signals based on which object sends signals to it.</p>
<!-- @@@map -->
<!-- $$$map$$$mapQObject* -->
<h3 class="fn" id="map-1"><a name="map-1"></a><code>[slot] </code><span class="type">void</span> QSignalMapper::<span class="name">map</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>)</h3>
<p>This slot emits signals based on the <i>sender</i> object.</p>
<!-- @@@map -->
<!-- $$$mapped[overload1]$$$mappedint -->
<h3 class="fn" id="mapped"><a name="mapped"></a><code>[signal] </code><span class="type">void</span> QSignalMapper::<span class="name">mapped</span>(<span class="type">int</span> <i>i</i>)</h3>
<p>This signal is emitted when <a href="qsignalmapper.html#map">map</a>() is signalled from an object that has an integer mapping set. The object's mapped integer is passed in <i>i</i>.</p>
<p><b>Note:</b> Signal <i>mapped</i> is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:<pre class="cpp">
connect(signalMapper<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type">int</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span><span class="operator">::</span>mapped)<span class="operator">,</span>
<span class="operator">[</span><span class="operator">=</span><span class="operator">]</span>(<span class="type">int</span> i){ <span class="comment">/* ... */</span> });
</pre>
<p><b>See also </b><a href="qsignalmapper.html#setMapping">setMapping</a>().</p>
<!-- @@@mapped -->
<!-- $$$mapped$$$mappedconstQString& -->
<h3 class="fn" id="mapped-1"><a name="mapped-1"></a><code>[signal] </code><span class="type">void</span> QSignalMapper::<span class="name">mapped</span>(const <span class="type"><a href="qstring.html">QString</a></span> &<i>text</i>)</h3>
<p>This signal is emitted when <a href="qsignalmapper.html#map">map</a>() is signalled from an object that has a string mapping set. The object's mapped string is passed in <i>text</i>.</p>
<p><b>Note:</b> Signal <i>mapped</i> is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:<pre class="cpp">
connect(signalMapper<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span><span class="operator">::</span>mapped)<span class="operator">,</span>
<span class="operator">[</span><span class="operator">=</span><span class="operator">]</span>(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>text){ <span class="comment">/* ... */</span> });
</pre>
<p><b>See also </b><a href="qsignalmapper.html#setMapping">setMapping</a>().</p>
<!-- @@@mapped -->
<!-- $$$mapped$$$mappedQWidget* -->
<h3 class="fn" id="mapped-2"><a name="mapped-2"></a><code>[signal] </code><span class="type">void</span> QSignalMapper::<span class="name">mapped</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>widget</i>)</h3>
<p>This signal is emitted when <a href="qsignalmapper.html#map">map</a>() is signalled from an object that has a widget mapping set. The object's mapped widget is passed in <i>widget</i>.</p>
<p><b>Note:</b> Signal <i>mapped</i> is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:<pre class="cpp">
connect(signalMapper<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span><span class="operator">::</span>mapped)<span class="operator">,</span>
<span class="operator">[</span><span class="operator">=</span><span class="operator">]</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> <span class="operator">*</span>widget){ <span class="comment">/* ... */</span> });
</pre>
<p><b>See also </b><a href="qsignalmapper.html#setMapping">setMapping</a>().</p>
<!-- @@@mapped -->
<!-- $$$mapped$$$mappedQObject* -->
<h3 class="fn" id="mapped-3"><a name="mapped-3"></a><code>[signal] </code><span class="type">void</span> QSignalMapper::<span class="name">mapped</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>object</i>)</h3>
<p>This signal is emitted when <a href="qsignalmapper.html#map">map</a>() is signalled from an object that has an object mapping set. The object provided by the map is passed in <i>object</i>.</p>
<p><b>Note:</b> Signal <i>mapped</i> is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:<pre class="cpp">
connect(signalMapper<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type"><a href="qobject.html#QObject">QObject</a></span> <span class="operator">*</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span><span class="type"><a href="qsignalmapper.html#QSignalMapper">QSignalMapper</a></span><span class="operator">::</span>mapped)<span class="operator">,</span>
<span class="operator">[</span><span class="operator">=</span><span class="operator">]</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> <span class="operator">*</span>object){ <span class="comment">/* ... */</span> });
</pre>
<p><b>See also </b><a href="qsignalmapper.html#setMapping">setMapping</a>().</p>
<!-- @@@mapped -->
<!-- $$$mapping[overload1]$$$mappingint -->
<h3 class="fn" id="mapping"><a name="mapping"></a><span class="type"><a href="qobject.html#QObject">QObject</a></span> *QSignalMapper::<span class="name">mapping</span>(<span class="type">int</span> <i>id</i>) const</h3>
<p>Returns the sender <a href="qobject.html">QObject</a> that is associated with the <i>id</i>.</p>
<p><b>See also </b><a href="qsignalmapper.html#setMapping">setMapping</a>().</p>
<!-- @@@mapping -->
<!-- $$$mapping$$$mappingconstQString& -->
<h3 class="fn" id="mapping-1"><a name="mapping-1"></a><span class="type"><a href="qobject.html#QObject">QObject</a></span> *QSignalMapper::<span class="name">mapping</span>(const <span class="type"><a href="qstring.html">QString</a></span> &<i>id</i>) const</h3>
<p>This function overloads <a href="qsignalmapper.html#mapping">mapping</a>().</p>
<!-- @@@mapping -->
<!-- $$$mapping$$$mappingQWidget* -->
<h3 class="fn" id="mapping-2"><a name="mapping-2"></a><span class="type"><a href="qobject.html#QObject">QObject</a></span> *QSignalMapper::<span class="name">mapping</span>(<span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>widget</i>) const</h3>
<p>This function overloads <a href="qsignalmapper.html#mapping">mapping</a>().</p>
<p>Returns the sender <a href="qobject.html">QObject</a> that is associated with the <i>widget</i>.</p>
<!-- @@@mapping -->
<!-- $$$mapping$$$mappingQObject* -->
<h3 class="fn" id="mapping-3"><a name="mapping-3"></a><span class="type"><a href="qobject.html#QObject">QObject</a></span> *QSignalMapper::<span class="name">mapping</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>object</i>) const</h3>
<p>This function overloads <a href="qsignalmapper.html#mapping">mapping</a>().</p>
<p>Returns the sender <a href="qobject.html">QObject</a> that is associated with the <i>object</i>.</p>
<!-- @@@mapping -->
<!-- $$$removeMappings[overload1]$$$removeMappingsQObject* -->
<h3 class="fn" id="removeMappings"><a name="removeMappings"></a><span class="type">void</span> QSignalMapper::<span class="name">removeMappings</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>)</h3>
<p>Removes all mappings for <i>sender</i>.</p>
<p>This is done automatically when mapped objects are destroyed.</p>
<p><b>Note: </b>This does not disconnect any signals. If <i>sender</i> is not destroyed then this will need to be done explicitly if required.</p><!-- @@@removeMappings -->
<!-- $$$setMapping[overload1]$$$setMappingQObject*int -->
<h3 class="fn" id="setMapping"><a name="setMapping"></a><span class="type">void</span> QSignalMapper::<span class="name">setMapping</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>, <span class="type">int</span> <i>id</i>)</h3>
<p>Adds a mapping so that when <a href="qsignalmapper.html#map">map</a>() is signalled from the given <i>sender</i>, the signal mapped(<i>id</i>) is emitted.</p>
<p>There may be at most one integer ID for each sender.</p>
<p><b>See also </b><a href="qsignalmapper.html#mapping">mapping</a>().</p>
<!-- @@@setMapping -->
<!-- $$$setMapping$$$setMappingQObject*constQString& -->
<h3 class="fn" id="setMapping-1"><a name="setMapping-1"></a><span class="type">void</span> QSignalMapper::<span class="name">setMapping</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>, const <span class="type"><a href="qstring.html">QString</a></span> &<i>text</i>)</h3>
<p>Adds a mapping so that when <a href="qsignalmapper.html#map">map</a>() is signalled from the <i>sender</i>, the signal mapped(<i>text</i> ) is emitted.</p>
<p>There may be at most one text for each sender.</p>
<!-- @@@setMapping -->
<!-- $$$setMapping$$$setMappingQObject*QWidget* -->
<h3 class="fn" id="setMapping-2"><a name="setMapping-2"></a><span class="type">void</span> QSignalMapper::<span class="name">setMapping</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>, <span class="type"><a href="../qtwidgets/qwidget.html">QWidget</a></span> *<i>widget</i>)</h3>
<p>Adds a mapping so that when <a href="qsignalmapper.html#map">map</a>() is signalled from the <i>sender</i>, the signal mapped(<i>widget</i> ) is emitted.</p>
<p>There may be at most one widget for each sender.</p>
<!-- @@@setMapping -->
<!-- $$$setMapping$$$setMappingQObject*QObject* -->
<h3 class="fn" id="setMapping-3"><a name="setMapping-3"></a><span class="type">void</span> QSignalMapper::<span class="name">setMapping</span>(<span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>sender</i>, <span class="type"><a href="qobject.html#QObject">QObject</a></span> *<i>object</i>)</h3>
<p>Adds a mapping so that when <a href="qsignalmapper.html#map">map</a>() is signalled from the <i>sender</i>, the signal mapped(<i>object</i> ) is emitted.</p>
<p>There may be at most one object for each sender.</p>
<!-- @@@setMapping -->
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distrib
>
Mageia
>
7
>
armv7hl
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media
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core-updates
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by-pkgid
>
d5e62c01ae8d1e579463c6a871dd44bf
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files
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722
