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<div class="title">Wt::WSignalMapper< T, A1 > Class Template Reference<div class="ingroups"><a class="el" href="group__signalslot.html">Signal/slot system</a></div></div> </div>
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<!-- doxytag: class="Wt::WSignalMapper" --><!-- doxytag: inherits="Wt::WObject" -->
<p>A utility class to connect multiple senders to a single slot.
<a href="classWt_1_1WSignalMapper.html#details">More...</a></p>
<p><code>#include <Wt/WSignalMapper></code></p>
<div class="dynheader">
Inheritance diagram for Wt::WSignalMapper< T, A1 >:</div>
<div class="dyncontent">
<div class="center"><img src="classWt_1_1WSignalMapper__inherit__graph.png" border="0" usemap="#Wt_1_1WSignalMapper_3_01T_00_01A1_01_4_inherit__map" alt="Inheritance graph"/></div>
<map name="Wt_1_1WSignalMapper_3_01T_00_01A1_01_4_inherit__map" id="Wt_1_1WSignalMapper_3_01T_00_01A1_01_4_inherit__map">
<area shape="rect" href="classWt_1_1WObject.html" title="A base class for objects that participate in the signal/slot system." alt="" coords="53,5,149,32"/></map>
<center><span class="legend">[<a href="graph_legend.html">legend</a>]</span></center></div>
<p><a href="classWt_1_1WSignalMapper-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a5c23094be042e549bb54a09c14fd5bd2"></a><!-- doxytag: member="Wt::WSignalMapper::WSignalMapper" ref="a5c23094be042e549bb54a09c14fd5bd2" args="(WObject *parent=0)" -->
 </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a5c23094be042e549bb54a09c14fd5bd2">WSignalMapper</a> (<a class="el" href="classWt_1_1WObject.html">WObject</a> *parent=0)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a new WSignalMapper. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc">setMapping</a> (<a class="el" href="classWt_1_1WObject.html">WObject</a> *sender, const T &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Associates data with a sender. <a href="#a89ccb4bde41e6e326072077214756ccc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">boost::signals::connection </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30">mapConnect</a> (<a class="el" href="classWt_1_1SignalBase.html">SignalBase</a> &signal, const T &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Maps a signal without arguments. <a href="#a1d2c6572bf0b8dbd21e2f0d0b19dfc30"></a><br/></td></tr>
<tr><td class="memTemplParams" colspan="2">template<typename S > </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top">boost::signals::connection </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a8507b91052dff4103dd74b6ac9b8738e">mapConnect1</a> (S &signal, const T &data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Maps a signal with one argument. <a href="#a8507b91052dff4103dd74b6ac9b8738e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="classWt_1_1Signal.html">Signal</a>< T, A1 > & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb">mapped</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Signal emitted in response to a signal sent to <a class="el" href="classWt_1_1WSignalMapper.html#af4bc239e4f47ae25e6544be3dd1676de" title="Slot to which to connect the source signal.">map()</a> or <a class="el" href="classWt_1_1WSignalMapper.html#a236a9f2bfa71fd1f990f04e105782976" title="Slot to which to connect the source signal, passing the argument to the receiver.">map1()</a>. <a href="#abd2fae2a26c9f89928d32f6e209671eb"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#af4bc239e4f47ae25e6544be3dd1676de">map</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Slot to which to connect the source signal. <a href="#af4bc239e4f47ae25e6544be3dd1676de"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a236a9f2bfa71fd1f990f04e105782976">map1</a> (A1 a)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Slot to which to connect the source signal, passing the argument to the receiver. <a href="#a236a9f2bfa71fd1f990f04e105782976"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WSignalMapper.html#a395e321c3c545225a3669608044b2454">removeMapping</a> (<a class="el" href="classWt_1_1WObject.html">WObject</a> *sender)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Removes the mapping of an object. <a href="#a395e321c3c545225a3669608044b2454"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><h3>template<typename T, typename A1 = NoClass><br/>
class Wt::WSignalMapper< T, A1 ></h3>
<p>A utility class to connect multiple senders to a single slot. </p>
<p>This class is useful if you would like to respond to signals of many objects or widgets within a single slot, but need to identify the particular sender through some property.</p>
<p>Usage example: </p>
<div class="fragment"><pre class="fragment"> <span class="keywordtype">void</span> Test::createWidgets()
{
<a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<WText *></a> *MyMap = <span class="keyword">new</span> <a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<Wt::WText *></a>(<span class="keyword">this</span>);
<span class="comment">// connect mapped() to our target slot</span>
MyMap-><a class="code" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped</a>().connect(<span class="keyword">this</span>, &Test::onClick);
<span class="comment">// connect and map every source signal to the mapper</span>
MyMap-><a class="code" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect</a>(text1->clicked(), text1);
MyMap-><a class="code" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect</a>(text2->clicked(), text2);
MyMap-><a class="code" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect</a>(text3->clicked(), text3);
}
<span class="keywordtype">void</span> Test::onClick(WText* source)
{
<span class="comment">// source is where it is coming from</span>
<span class="comment">// ...</span>
}
</pre></div><p>The type <em>T</em> may be any type that has proper copy semantics and a default constructor. The mapper may pass one extra argument (type <em>A1</em>) from the original signal to the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal. In that case, you must connect the original signal to the <a class="el" href="classWt_1_1WSignalMapper.html#a236a9f2bfa71fd1f990f04e105782976" title="Slot to which to connect the source signal, passing the argument to the receiver.">map1()</a> slot, or use <a class="el" href="classWt_1_1WSignalMapper.html#a8507b91052dff4103dd74b6ac9b8738e" title="Maps a signal with one argument.">mapConnect1()</a>.</p>
<p>The mapper uses signal.sender() to attribute ownership of a signal to a sender.</p>
<p>You may want to consider to boost::bind() (or std::bind()) instead, which is simpler and achieves the same in a more direct way: </p>
<div class="fragment"><pre class="fragment"> text1->clicked().connect(boost::bind(&Test::onClick, <span class="keyword">this</span>, text1));
text2->clicked().connect(boost::bind(&Test::onClick, <span class="keyword">this</span>, text2));
text3->clicked().connect(boost::bind(&Test::onClick, <span class="keyword">this</span>, text3));
</pre></div> </div><hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="af4bc239e4f47ae25e6544be3dd1676de"></a><!-- doxytag: member="Wt::WSignalMapper::map" ref="af4bc239e4f47ae25e6544be3dd1676de" args="()" -->
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<td class="memname">void <a class="el" href="classWt_1_1WSignalMapper.html">Wt::WSignalMapper</a>< T, A1 >::map </td>
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<p>Slot to which to connect the source signal. </p>
<p>When a signal triggers the slot, the sender is identified and used to find corresponding data set with <a class="el" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc" title="Associates data with a sender.">setMapping()</a>, which is then use to propagate further in the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal. </p>
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<a class="anchor" id="a236a9f2bfa71fd1f990f04e105782976"></a><!-- doxytag: member="Wt::WSignalMapper::map1" ref="a236a9f2bfa71fd1f990f04e105782976" args="(A1 a)" -->
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template<typename T , typename A1> </div>
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<td class="memname">void <a class="el" href="classWt_1_1WSignalMapper.html">Wt::WSignalMapper</a>< T, A1 >::map1 </td>
<td>(</td>
<td class="paramtype">A1 </td>
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<p>Slot to which to connect the source signal, passing the argument to the receiver. </p>
<p>When a signal triggers the slot, the sender is identified and used to find corresponding data set with <a class="el" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc" title="Associates data with a sender.">setMapping()</a>, which is then use to propagate further in the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal. The additional argument <code>a</code> is passed as the second argument to the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal. </p>
</div>
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<a class="anchor" id="a1d2c6572bf0b8dbd21e2f0d0b19dfc30"></a><!-- doxytag: member="Wt::WSignalMapper::mapConnect" ref="a1d2c6572bf0b8dbd21e2f0d0b19dfc30" args="(SignalBase &signal, const T &data)" -->
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<td class="memname">boost::signals::connection <a class="el" href="classWt_1_1WSignalMapper.html">Wt::WSignalMapper</a>< T, A1 >::mapConnect </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classWt_1_1SignalBase.html">SignalBase</a> & </td>
<td class="paramname"><em>signal</em>, </td>
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<p>Maps a signal without arguments. </p>
<p>Connect the given signal with the slot, and associate the data when it is triggered.</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T></a> *mapper = ...
mapper-><a class="code" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect</a>(widget->clicked(), data);
</pre></div><p> is equivalent to: </p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T></a> *mapper = ...
widget->clicked().connect(mapper, &<a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T>::map</a>);
mapper-><a class="code" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc" title="Associates data with a sender.">setMapping</a>(widget, data);
</pre></div>
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<a class="anchor" id="a8507b91052dff4103dd74b6ac9b8738e"></a><!-- doxytag: member="Wt::WSignalMapper::mapConnect1" ref="a8507b91052dff4103dd74b6ac9b8738e" args="(S &signal, const T &data)" -->
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<td>(</td>
<td class="paramtype">S & </td>
<td class="paramname"><em>signal</em>, </td>
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<p>Maps a signal with one argument. </p>
<p>Connect the given signal with the slot, and associate the data when it is triggered. The signal argument will be passed to the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal.</p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T, Wt::WMouseEvent></a> *mapper = ...
mapper-><a class="code" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect</a>(widget->clicked(), data);
</pre></div><p> is equivalent to: </p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T, Wt::WMouseEvent></a> *mapper = ...
widget->clicked().connect(mapper, &<a class="code" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">Wt::WSignalMapper<T, Wt::WMouseEvent>::map1</a>);
mapper-><a class="code" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc" title="Associates data with a sender.">setMapping</a>(widget, data);
</pre></div>
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<a class="anchor" id="abd2fae2a26c9f89928d32f6e209671eb"></a><!-- doxytag: member="Wt::WSignalMapper::mapped" ref="abd2fae2a26c9f89928d32f6e209671eb" args="()" -->
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<td class="memname"><a class="el" href="classWt_1_1Signal.html">Signal</a><T, A1>& <a class="el" href="classWt_1_1WSignalMapper.html">Wt::WSignalMapper</a>< T, A1 >::mapped </td>
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<p>Signal emitted in response to a signal sent to <a class="el" href="classWt_1_1WSignalMapper.html#af4bc239e4f47ae25e6544be3dd1676de" title="Slot to which to connect the source signal.">map()</a> or <a class="el" href="classWt_1_1WSignalMapper.html#a236a9f2bfa71fd1f990f04e105782976" title="Slot to which to connect the source signal, passing the argument to the receiver.">map1()</a>. </p>
<p>The first argument propagated is the data that is associated with the specific sender, set in <a class="el" href="classWt_1_1WSignalMapper.html#a89ccb4bde41e6e326072077214756ccc" title="Associates data with a sender.">setMapping()</a> or <a class="el" href="classWt_1_1WSignalMapper.html#a1d2c6572bf0b8dbd21e2f0d0b19dfc30" title="Maps a signal without arguments.">mapConnect()</a>. The second argument is an argument passed from the originating signal. </p>
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<a class="anchor" id="a395e321c3c545225a3669608044b2454"></a><!-- doxytag: member="Wt::WSignalMapper::removeMapping" ref="a395e321c3c545225a3669608044b2454" args="(WObject *sender)" -->
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<p>Removes the mapping of an object. </p>
<p>This method does not disconnect any signals; that is the responsability of the user of <a class="el" href="classWt_1_1WSignalMapper.html" title="A utility class to connect multiple senders to a single slot.">WSignalMapper</a>. If no mapping of for an object exits, the mapper will ignore the signal, and not emit the mapped signal. </p>
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<a class="anchor" id="a89ccb4bde41e6e326072077214756ccc"></a><!-- doxytag: member="Wt::WSignalMapper::setMapping" ref="a89ccb4bde41e6e326072077214756ccc" args="(WObject *sender, const T &data)" -->
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template<typename T, typename A1 > </div>
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<td class="memname">void <a class="el" href="classWt_1_1WSignalMapper.html">Wt::WSignalMapper</a>< T, A1 >::setMapping </td>
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<td class="paramname"><em>sender</em>, </td>
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<p>Associates data with a sender. </p>
<p>Associate data with a sender, which wel emitted by the <a class="el" href="classWt_1_1WSignalMapper.html#abd2fae2a26c9f89928d32f6e209671eb" title="Signal emitted in response to a signal sent to map() or map1().">mapped()</a> signal, when the corresponding sender signal triggers <a class="el" href="classWt_1_1WSignalMapper.html#af4bc239e4f47ae25e6544be3dd1676de" title="Slot to which to connect the source signal.">map()</a> or <a class="el" href="classWt_1_1WSignalMapper.html#a236a9f2bfa71fd1f990f04e105782976" title="Slot to which to connect the source signal, passing the argument to the receiver.">map1()</a>. </p>
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