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<div class="navpath"><a class="el" href="namespacesigc.html">sigc</a>::<a class="el" href="structsigc_1_1connection.html">connection</a>
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<h1>sigc::connection Struct Reference<br/>
<small>
[<a class="el" href="group__signal.html">Signals</a>]</small>
</h1><!-- doxytag: class="sigc::connection" -->
<p>Convinience class for safe disconnection. <a href="#_details">More...</a></p>
<p><code>#include <sigc++/connection.h></code></p>
<p><a href="structsigc_1_1connection-members.html">List of all members.</a></p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a9b74451c9a6a53bcc704a879f088cc7d">connection</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs an empty <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object. <a href="#a9b74451c9a6a53bcc704a879f088cc7d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#ad13d5e3331cc9b1494e0edb8fa37fdba">connection</a> (const <a class="el" href="structsigc_1_1connection.html">connection</a>& c)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object copying an existing one. <a href="#ad13d5e3331cc9b1494e0edb8fa37fdba"></a><br/></td></tr>
<tr><td class="memTemplParams" colspan="2">template<typename T_slot > </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top"> </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a2c59699f1f6aefa74a387d62a9a85e68">connection</a> (const <a class="el" href="structsigc_1_1slot__iterator.html">slot_iterator</a>< T_slot >& it)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object from a <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator. <a href="#a2c59699f1f6aefa74a387d62a9a85e68"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a124709de26781e5ffcf8bbb5dcd621ed">connection</a> (<a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& sl)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object from a <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> object. <a href="#a124709de26781e5ffcf8bbb5dcd621ed"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1connection.html">connection</a>& </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a016094b53bafdc9ce593febb68cb00a5">operator=</a> (const <a class="el" href="structsigc_1_1connection.html">connection</a>& c)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Overrides this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object copying another one. <a href="#a016094b53bafdc9ce593febb68cb00a5"></a><br/></td></tr>
<tr><td class="memTemplParams" colspan="2">template<typename T_slot > </td></tr>
<tr><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="structsigc_1_1connection.html">connection</a>& </td><td class="memTemplItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a4ac3b12c4c55463166189db98701999d">operator=</a> (const <a class="el" href="structsigc_1_1slot__iterator.html">slot_iterator</a>< T_slot >& it)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Overrides this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object with another <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator. <a href="#a4ac3b12c4c55463166189db98701999d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a95ddcc6d1009adda4f2cc19cf246d2c7">empty</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. <a href="#a95ddcc6d1009adda4f2cc19cf246d2c7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a86fcc7064a64aa15528d454b7f078225">connected</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. <a href="#a86fcc7064a64aa15528d454b7f078225"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a2c8ce2977a9e681d06c594ad90b41098">blocked</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is blocked. <a href="#a2c8ce2977a9e681d06c594ad90b41098"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a6b09ee3010464b22abb3269935afcc49">block</a> (bool should_block=true)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets or unsets the blocking state of this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a>. <a href="#a6b09ee3010464b22abb3269935afcc49"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#aef87f355a73d50e8e54228a6fcbd1c6e">unblock</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Unsets the blocking state of this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a>. <a href="#aef87f355a73d50e8e54228a6fcbd1c6e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0452bd182a61650d14a9664d6297ed1b"></a><!-- doxytag: member="sigc::connection::disconnect" ref="a0452bd182a61650d14a9664d6297ed1b" args="()" -->
void </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a0452bd182a61650d14a9664d6297ed1b">disconnect</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Disconnects the referred <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a>. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#a67441b54b559cb1f84df9293dc0f5787">operator bool</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. <a href="#a67441b54b559cb1f84df9293dc0f5787"></a><br/></td></tr>
<tr><td colspan="2"><h2>Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static void* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsigc_1_1connection.html#ad45fe90d68fe295e76e130b070e97070">notify</a> (void* data)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Callback that is executed when the referred <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> is destroyed. <a href="#ad45fe90d68fe295e76e130b070e97070"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Convinience class for safe disconnection. </p>
<p>Iterators must not be used beyond the lifetime of the list they work on. A <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object can be created from a <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator and may safely be used to disconnect the referred <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> at any time (<a class="el" href="structsigc_1_1connection.html#a0452bd182a61650d14a9664d6297ed1b" title="Disconnects the referred slot.">disconnect()</a>). If the <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> has already been destroyed, <a class="el" href="structsigc_1_1connection.html#a0452bd182a61650d14a9664d6297ed1b" title="Disconnects the referred slot.">disconnect()</a> does nothing. <a class="el" href="structsigc_1_1connection.html#a95ddcc6d1009adda4f2cc19cf246d2c7" title="Returns whether the connection is still active.">empty()</a> or operator bool() can be used to test whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. The <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> can be blocked (<a class="el" href="structsigc_1_1connection.html#a6b09ee3010464b22abb3269935afcc49" title="Sets or unsets the blocking state of this connection.">block()</a>, <a class="el" href="structsigc_1_1connection.html#aef87f355a73d50e8e54228a6fcbd1c6e" title="Unsets the blocking state of this connection.">unblock()</a>).</p>
<p>This is possible because the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object gets notified when the referred <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> dies (<a class="el" href="structsigc_1_1connection.html#ad45fe90d68fe295e76e130b070e97070" title="Callback that is executed when the referred slot is destroyed.">notify()</a>). </p>
<hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="a9b74451c9a6a53bcc704a879f088cc7d"></a><!-- doxytag: member="sigc::connection::connection" ref="a9b74451c9a6a53bcc704a879f088cc7d" args="()" -->
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<td class="memname">sigc::connection::connection </td>
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<p>Constructs an empty <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object. </p>
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<a class="anchor" id="ad13d5e3331cc9b1494e0edb8fa37fdba"></a><!-- doxytag: member="sigc::connection::connection" ref="ad13d5e3331cc9b1494e0edb8fa37fdba" args="(const connection &c)" -->
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<td class="memname">sigc::connection::connection </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structsigc_1_1connection.html">connection</a>& </td>
<td class="paramname"> <em>c</em></td>
<td> ) </td>
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<p>Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object copying an existing one. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>c</em> </td><td>The <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object to make a copy from. </td></tr>
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<a class="anchor" id="a2c59699f1f6aefa74a387d62a9a85e68"></a><!-- doxytag: member="sigc::connection::connection" ref="a2c59699f1f6aefa74a387d62a9a85e68" args="(const slot_iterator< T_slot > &it)" -->
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template <typename T_slot > </div>
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<td class="memname">sigc::connection::connection </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structsigc_1_1slot__iterator.html">slot_iterator</a>< T_slot >& </td>
<td class="paramname"> <em>it</em></td>
<td> ) </td>
<td><code> [inline]</code></td>
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<p>Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object from a <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator. </p>
<dl><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>it</em> </td><td>The <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator to take the <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> from. </td></tr>
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<a class="anchor" id="a124709de26781e5ffcf8bbb5dcd621ed"></a><!-- doxytag: member="sigc::connection::connection" ref="a124709de26781e5ffcf8bbb5dcd621ed" args="(slot_base &sl)" -->
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<td class="memname">sigc::connection::connection </td>
<td>(</td>
<td class="paramtype"><a class="el" href="classsigc_1_1slot__base.html">slot_base</a>& </td>
<td class="paramname"> <em>sl</em></td>
<td> ) </td>
<td><code> [explicit]</code></td>
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<p>Constructs a <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object from a <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> object. </p>
<p>This is only useful if you create your own <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>sl</em> </td><td>The <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> to operate on. </td></tr>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a6b09ee3010464b22abb3269935afcc49"></a><!-- doxytag: member="sigc::connection::block" ref="a6b09ee3010464b22abb3269935afcc49" args="(bool should_block=true)" -->
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<td class="memname">bool sigc::connection::block </td>
<td>(</td>
<td class="paramtype">bool </td>
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<p>Sets or unsets the blocking state of this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a>. </p>
<p>See <a class="el" href="classsigc_1_1slot__base.html#a69042c2e2b0e5449fbf8203e862192a7" title="Sets the blocking state.">slot_base::block()</a> for details. </p>
<dl><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>should_block</em> </td><td>Indicates whether the blocking state should be set or unset. </td></tr>
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<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> has been in blocking state before. </dd></dl>
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<a class="anchor" id="a2c8ce2977a9e681d06c594ad90b41098"></a><!-- doxytag: member="sigc::connection::blocked" ref="a2c8ce2977a9e681d06c594ad90b41098" args="() const " -->
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<td class="memname">bool sigc::connection::blocked </td>
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<p>Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is blocked. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is blocked. </dd></dl>
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<a class="anchor" id="a86fcc7064a64aa15528d454b7f078225"></a><!-- doxytag: member="sigc::connection::connected" ref="a86fcc7064a64aa15528d454b7f078225" args="() const " -->
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<td class="memname">bool sigc::connection::connected </td>
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<p>Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </dd></dl>
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<a class="anchor" id="a95ddcc6d1009adda4f2cc19cf246d2c7"></a><!-- doxytag: member="sigc::connection::empty" ref="a95ddcc6d1009adda4f2cc19cf246d2c7" args="() const " -->
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<p>Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>false</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </dd></dl>
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<a class="anchor" id="ad45fe90d68fe295e76e130b070e97070"></a><!-- doxytag: member="sigc::connection::notify" ref="ad45fe90d68fe295e76e130b070e97070" args="(void *data)" -->
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<td class="memname">static void* sigc::connection::notify </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"> <em>data</em></td>
<td> ) </td>
<td><code> [static]</code></td>
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<p>Callback that is executed when the referred <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> is destroyed. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>d</em> </td><td>The <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object notified (<code>this</code>). </td></tr>
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<a class="anchor" id="a67441b54b559cb1f84df9293dc0f5787"></a><!-- doxytag: member="sigc::connection::operator bool" ref="a67441b54b559cb1f84df9293dc0f5787" args="()" -->
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<td class="memname">sigc::connection::operator bool </td>
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<p>Returns whether the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> is still active. </dd></dl>
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<a class="anchor" id="a4ac3b12c4c55463166189db98701999d"></a><!-- doxytag: member="sigc::connection::operator=" ref="a4ac3b12c4c55463166189db98701999d" args="(const slot_iterator< T_slot > &it)" -->
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template <typename T_slot > </div>
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<td class="memname"><a class="el" href="structsigc_1_1connection.html">connection</a>& sigc::connection::operator= </td>
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<td><code> [inline]</code></td>
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<p>Overrides this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object with another <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator. </p>
<dl><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>it</em> </td><td>The new <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> list iterator to take the <a class="el" href="classsigc_1_1slot.html" title="Convenience wrapper for the numbered sigc::slot# templates.">slot</a> from. </td></tr>
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<a class="anchor" id="a016094b53bafdc9ce593febb68cb00a5"></a><!-- doxytag: member="sigc::connection::operator=" ref="a016094b53bafdc9ce593febb68cb00a5" args="(const connection &c)" -->
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<td class="memname"><a class="el" href="structsigc_1_1connection.html">connection</a>& sigc::connection::operator= </td>
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<p>Overrides this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object copying another one. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>c</em> </td><td>The <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> object to make a copy from. </td></tr>
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<a class="anchor" id="aef87f355a73d50e8e54228a6fcbd1c6e"></a><!-- doxytag: member="sigc::connection::unblock" ref="aef87f355a73d50e8e54228a6fcbd1c6e" args="()" -->
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<td class="memname">bool sigc::connection::unblock </td>
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<p>Unsets the blocking state of this <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a>. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd><code>true</code> if the <a class="el" href="structsigc_1_1connection.html" title="Convinience class for safe disconnection.">connection</a> has been in blocking state before. </dd></dl>
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<hr size="1"/><address style="text-align: right;"><small>Generated on Tue May 4 21:44:42 2010 for libsigc++ by 
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