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 <span id="projectnumber">2.10.0</span>
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<li class="navelem"><a class="el" href="namespacesigc.html">sigc</a></li><li class="navelem"><a class="el" href="structsigc_1_1trackable.html">trackable</a></li> </ul>
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<p>Base class for objects with auto-disconnection.
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<p><code>#include <sigc++/trackable.h></code></p>
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Inheritance diagram for sigc::trackable:</div>
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Public Types</h2></td></tr>
<tr class="memitem:a3338954d7565534bd945290b798e13ed"><td class="memItemLeft" align="right" valign="top">typedef internal::func_destroy_notify </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a3338954d7565534bd945290b798e13ed">func_destroy_notify</a></td></tr>
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Public Member Functions</h2></td></tr>
<tr class="memitem:a7e1348841e762fb41b41c6f2ce9fa073"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a7e1348841e762fb41b41c6f2ce9fa073">trackable</a> () noexcept</td></tr>
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<tr class="memitem:ac8431d9452c9698a012597e6560c72fa"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ac8431d9452c9698a012597e6560c72fa">trackable</a> (const <a class="el" href="structsigc_1_1trackable.html">trackable</a>& src) noexcept</td></tr>
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<tr class="memitem:aba42ed8afb6598106cf68c18a7387f18"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#aba42ed8afb6598106cf68c18a7387f18">trackable</a> (<a class="el" href="structsigc_1_1trackable.html">trackable</a>&& src)</td></tr>
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<tr class="memitem:a75587da09e30031db7a2519843f1f4fb"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a75587da09e30031db7a2519843f1f4fb">~trackable</a> ()</td></tr>
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<tr class="memitem:ab14931670837728e49bb5ca88fb16db5"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5">add_destroy_notify_callback</a> (void* data, <a class="el" href="structsigc_1_1trackable.html#a3338954d7565534bd945290b798e13ed">func_destroy_notify</a> func) const </td></tr>
<tr class="memdesc:ab14931670837728e49bb5ca88fb16db5"><td class="mdescLeft"> </td><td class="mdescRight">Add a callback that is executed (notified) when the trackable object is detroyed. <a href="#ab14931670837728e49bb5ca88fb16db5">More...</a><br /></td></tr>
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<tr class="memitem:af2e23cfe7adc1ca844a3350bbac557cb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#af2e23cfe7adc1ca844a3350bbac557cb">notify_callbacks</a> ()</td></tr>
<tr class="memdesc:af2e23cfe7adc1ca844a3350bbac557cb"><td class="mdescLeft"> </td><td class="mdescRight">Execute and remove all previously installed callbacks. <a href="#af2e23cfe7adc1ca844a3350bbac557cb">More...</a><br /></td></tr>
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<tr class="memitem:a7494fbad23a65932ff1457d00d4edaf5"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a7494fbad23a65932ff1457d00d4edaf5">operator=</a> (const <a class="el" href="structsigc_1_1trackable.html">trackable</a>& src)</td></tr>
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<tr class="memitem:ac3d61cdb452dc46fcdc8a8d42d9c079d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#ac3d61cdb452dc46fcdc8a8d42d9c079d">operator=</a> (<a class="el" href="structsigc_1_1trackable.html">trackable</a>&& src)</td></tr>
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<tr class="memitem:a8b9dffa8a50ff13ba33e6c7f10468e2b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1trackable.html#a8b9dffa8a50ff13ba33e6c7f10468e2b">remove_destroy_notify_callback</a> (void* data) const </td></tr>
<tr class="memdesc:a8b9dffa8a50ff13ba33e6c7f10468e2b"><td class="mdescLeft"> </td><td class="mdescRight">Remove a callback previously installed with <a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5" title="Add a callback that is executed (notified) when the trackable object is detroyed. ...">add_destroy_notify_callback()</a>. <a href="#a8b9dffa8a50ff13ba33e6c7f10468e2b">More...</a><br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Base class for objects with auto-disconnection. </p>
<p>trackable must be inherited when objects shall automatically invalidate slots referring to them on destruction. A slot built from a member function of a trackable derived type installs a callback that is invoked when the trackable object is destroyed or overwritten.</p>
<p><a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5" title="Add a callback that is executed (notified) when the trackable object is detroyed. ...">add_destroy_notify_callback()</a> and <a class="el" href="structsigc_1_1trackable.html#a8b9dffa8a50ff13ba33e6c7f10468e2b" title="Remove a callback previously installed with add_destroy_notify_callback(). ">remove_destroy_notify_callback()</a> can be used to manually install and remove callbacks when notification of the object dying is needed.</p>
<p><a class="el" href="structsigc_1_1trackable.html#af2e23cfe7adc1ca844a3350bbac557cb" title="Execute and remove all previously installed callbacks. ">notify_callbacks()</a> invokes and removes all previously installed callbacks and can therefore be used to disconnect from all signals.</p>
<p>Note that there is no virtual destructor. Don't use <code>trackable*</code> as pointer type for managing your data or the destructors of your derived types won't be called when deleting your objects. </p>
</div><h2 class="groupheader">Member Typedef Documentation</h2>
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<td class="memname">typedef internal::func_destroy_notify <a class="el" href="structsigc_1_1trackable.html#a3338954d7565534bd945290b798e13ed">sigc::trackable::func_destroy_notify</a></td>
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<h2 class="groupheader">Constructor & Destructor Documentation</h2>
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<h2 class="groupheader">Member Function Documentation</h2>
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<td class="memname">void sigc::trackable::add_destroy_notify_callback </td>
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<p>Add a callback that is executed (notified) when the trackable object is detroyed. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">data</td><td>Passed into func upon notification. </td></tr>
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<p>Execute and remove all previously installed callbacks. </p>
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<td class="memname"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& sigc::trackable::operator= </td>
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<td class="memname"><a class="el" href="structsigc_1_1trackable.html">trackable</a>& sigc::trackable::operator= </td>
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<td class="memname">void sigc::trackable::remove_destroy_notify_callback </td>
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<p>Remove a callback previously installed with <a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5" title="Add a callback that is executed (notified) when the trackable object is detroyed. ...">add_destroy_notify_callback()</a>. </p>
<p>The callback is not executed. </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">data</td><td>Parameter passed into previous call to <a class="el" href="structsigc_1_1trackable.html#ab14931670837728e49bb5ca88fb16db5" title="Add a callback that is executed (notified) when the trackable object is detroyed. ...">add_destroy_notify_callback()</a>. </td></tr>
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