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<title>libsigc++ 2.0: Slots</title>
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<h1>Slots<br>
<small>
[<a class="el" href="group__functors.html">Functors</a>]</small>
</h1>Slots are type-safe representations of callback methods and functions.
<a href="#_details">More...</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Classes</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot0.html">sigc::slot0<T_return></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot0.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot1.html">sigc::slot1<T_return, T_arg1></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot1.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot2.html">sigc::slot2<T_return, T_arg1, T_arg2></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot2.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot3.html">sigc::slot3<T_return, T_arg1, T_arg2, T_arg3></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot3.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot4.html">sigc::slot4<T_return, T_arg1, T_arg2, T_arg3, T_arg4></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot4.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot5.html">sigc::slot5<T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot5.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot6.html">sigc::slot6<T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot6.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot7.html">sigc::slot7<T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Converts an arbitrary functor to a unified type which is opaque. <a href="classsigc_1_1slot7.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot.html">sigc::slot<T_return, T_arg1, T_arg2, T_arg3, T_arg4, T_arg5, T_arg6, T_arg7></a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convenience wrapper for the numbered sigc::slot# templates. <a href="classsigc_1_1slot.html#_details">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">class </td><td class="memItemRight" valign="bottom"><a class="el" href="classsigc_1_1slot__base.html">sigc::slot_base</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Base type for slots. <a href="classsigc_1_1slot__base.html#_details">More...</a><br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
Slots are type-safe representations of callback methods and functions.
<p>
A Slot can be constructed from any function, regardless of whether it is a global function, a member method, static, or virtual.<p>
Use the <a class="el" href="group__mem__fun.html#ga56">sigc::mem_fun()</a> and <a class="el" href="group__ptr__fun.html#ga8">sigc::ptr_fun()</a> template functions to get a <a class="el" href="classsigc_1_1slot.html">sigc::slot</a>, like so:<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classsigc_1_1slot.html">sigc::slot<void, int></a> sl = <a class="code" href="group__mem__fun.html#ga56">sigc::mem_fun</a>(someobj,& SomeClass::somemethod);
</pre></div><p>
or<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="classsigc_1_1slot.html">sigc::slot<void, int></a> sl = <a class="code" href="group__ptr__fun.html#ga8">sigc::ptr_fun</a>(&somefunction);
</pre></div><p>
or<p>
<div class="fragment"><pre class="fragment"> m_Button.signal_clicked().connect( sigc::mem_fun(*<span class="keyword">this</span>, &MyWindow::on_button_clicked) );
</pre></div><p>
The compiler will complain if SomeClass::somemethod, etc. have the wrong signature.<p>
You can also pass slots as method parameters where you might normally pass a function pointer. <hr><address><small>
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