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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Wt: Wt::WLayoutItemImpl Class Reference</title>
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<h1>Wt::WLayoutItemImpl Class Reference</h1><!-- doxytag: class="Wt::WLayoutItemImpl" -->An abstract base class for implementing layout managers.  
<a href="#_details">More...</a>
<p>
<code>#include &lt;Wt/WLayoutItemImpl&gt;</code>
<p>
Inherited by Wt::Ext::LayoutItemImpl, and Wt::StdLayoutItemImpl.
<p>

<p>
<a href="classWt_1_1WLayoutItemImpl-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="d558805de90c6edc63aa7603f64d4c68"></a><!-- doxytag: member="Wt::WLayoutItemImpl::~WLayoutItemImpl" ref="d558805de90c6edc63aa7603f64d4c68" args="()" -->
virtual&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#d558805de90c6edc63aa7603f64d4c68">~WLayoutItemImpl</a> ()</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Destructor. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#17f642513739083112ab2a69a05ca0a4">updateAddItem</a> (<a class="el" href="classWt_1_1WLayoutItem.html">WLayoutItem</a> *item)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Adds a layout <em>item</em>.  <a href="#17f642513739083112ab2a69a05ca0a4"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="34f32973eaa21e827dabdec5a797e2b6"></a><!-- doxytag: member="Wt::WLayoutItemImpl::updateRemoveItem" ref="34f32973eaa21e827dabdec5a797e2b6" args="(WLayoutItem *item)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#34f32973eaa21e827dabdec5a797e2b6">updateRemoveItem</a> (<a class="el" href="classWt_1_1WLayoutItem.html">WLayoutItem</a> *item)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Removes a layout <em>item</em>. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="8ea165afae63f97652bdb6854f2300f7"></a><!-- doxytag: member="Wt::WLayoutItemImpl::update" ref="8ea165afae63f97652bdb6854f2300f7" args="(WLayoutItem *item)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#8ea165afae63f97652bdb6854f2300f7">update</a> (<a class="el" href="classWt_1_1WLayoutItem.html">WLayoutItem</a> *item)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Updates the layout. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="21409185b748baef618fdac6e23a6f9a"></a><!-- doxytag: member="Wt::WLayoutItemImpl::parent" ref="21409185b748baef618fdac6e23a6f9a" args="() const =0" -->
virtual <a class="el" href="classWt_1_1WWidget.html">WWidget</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#21409185b748baef618fdac6e23a6f9a">parent</a> () const =0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Returns the widget for which this layout item participates in layout management. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="2ea7b787edada76fc0c9b7908caf673a"></a><!-- doxytag: member="Wt::WLayoutItemImpl::setHint" ref="2ea7b787edada76fc0c9b7908caf673a" args="(const std::string &amp;name, const std::string &amp;value)=0" -->
virtual void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WLayoutItemImpl.html#2ea7b787edada76fc0c9b7908caf673a">setHint</a> (const std::string &amp;name, const std::string &amp;value)=0</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Provides a hint that can aid in layout strategy / algorithm. <br></td></tr>
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<hr><a name="_details"></a><h2>Detailed Description</h2>
An abstract base class for implementing layout managers. 
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WLayoutItem.html" title="An abstract base class for items that can participate in a layout.">WLayoutItem</a>, <a class="el" href="classWt_1_1WLayout.html" title="An abstract base class for layout managers.">WLayout</a> </dd></dl>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="17f642513739083112ab2a69a05ca0a4"></a><!-- doxytag: member="Wt::WLayoutItemImpl::updateAddItem" ref="17f642513739083112ab2a69a05ca0a4" args="(WLayoutItem *item)=0" -->
<div class="memitem">
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          <td class="memname">virtual void Wt::WLayoutItemImpl::updateAddItem           </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="classWt_1_1WLayoutItem.html">WLayoutItem</a> *&nbsp;</td>
          <td class="paramname"> <em>item</em>          </td>
          <td>&nbsp;)&nbsp;</td>
          <td><code> [pure virtual]</code></td>
        </tr>
      </table>
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<div class="memdoc">

<p>
Adds a layout <em>item</em>. 
<p>
The <code>item</code> already has an implementation set. 
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