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70<li><a class="reference external" href="#config-options">Config Options</a></li>
71<li><a class="reference external" href="#public-methods">Public Methods</a></li>
72<li><a class="reference external" href="#events">Events</a></li>
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78            <p class="topless"><a href="LayerContainer.html"
79                                  title="previous chapter"><tt class="docutils literal docutils literal docutils literal"><span class="pre">GeoExt.tree.LayerContainer</span></tt></a></p>
80            <h4>Next topic</h4>
81            <p class="topless"><a href="LayerNode.html"
82                                  title="next chapter"><tt class="docutils literal"><span class="pre">GeoExt.tree.LayerNode</span></tt></a></p>
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91           
92  <div class="section" id="geoext-tree-layerloader">
93<h1><a title="GeoExt.tree.LayerLoader" class="reference internal" href="#GeoExt.tree.LayerLoader"><tt class="xref docutils literal"><span class="pre">GeoExt.tree.LayerLoader</span></tt></a><a class="headerlink" href="#geoext-tree-layerloader" title="Permalink to this headline">¶</a></h1>
94<dl class="meta docutils">
95<dt>Extends</dt>
96<dd><ul class="first last simple">
97<li><a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable">Ext.util.Observable</a></li>
98</ul>
99</dd>
100</dl>
101<dl class="class">
102<dt id="GeoExt.tree.LayerLoader">
103<em class="property">class </em><tt class="descclassname">GeoExt.tree.</tt><tt class="descname">LayerLoader</tt><a class="headerlink" href="#GeoExt.tree.LayerLoader" title="Permalink to this definition">¶</a></dt>
104<dd>A loader that will load all layers of a <a title="GeoExt.data.LayerStore" class="reference external" href="../../data/LayerStore.html#GeoExt.data.LayerStore"><tt class="xref docutils literal"><span class="pre">GeoExt.data.LayerStore</span></tt></a>
105By default, only layers that have displayInLayerSwitcher set to true
106will be included. The childrens&#8217; iconCls defaults to
107&#8220;gx-tree-layer-icon&#8221;.</dd></dl>
108
109<div class="section" id="config-options">
110<h2>Config Options<a class="headerlink" href="#config-options" title="Permalink to this headline">¶</a></h2>
111<p>Configuration properties in addition to
112those listed for <a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable">Ext.util.Observable</a>.</p>
113<dl class="describe">
114<dt>
115<tt class="descname">baseAttrs</tt></dt>
116<dd>An object containing attributes to be added to all nodes created by
117this loader.</dd></dl>
118
119<dl class="describe">
120<dt>
121<tt class="descname">filter</tt></dt>
122<dd><p><tt class="docutils literal"><span class="pre">Function</span></tt>
123A function, called in the scope of this loader, with a layer record
124as argument. Is expected to return true for layers to be loaded, false
125otherwise. By default, the filter checks for displayInLayerSwitcher:</p>
126<div class="highlight-javascript"><div class="highlight"><pre><span class="nx">filter</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">record</span><span class="p">)</span> <span class="p">{</span>
127    <span class="k">return</span> <span class="nx">record</span><span class="p">.</span><span class="nx">getLayer</span><span class="p">().</span><span class="nx">displayInLayerSwitcher</span> <span class="o">==</span> <span class="kc">true</span>
128<span class="p">}</span>
129</pre></div>
130</div>
131</dd></dl>
132
133<dl class="describe">
134<dt>
135<tt class="descname">store</tt></dt>
136<dd><a title="GeoExt.data.LayerStore" class="reference external" href="../../data/LayerStore.html#GeoExt.data.LayerStore"><tt class="xref docutils literal"><span class="pre">GeoExt.data.LayerStore</span></tt></a>
137The layer store containing layers to be added by this loader.</dd></dl>
138
139<dl class="describe">
140<dt>
141<tt class="descname">uiProviders</tt></dt>
142<dd><tt class="docutils literal"><span class="pre">Object</span></tt>
143An optional object containing properties which specify custom
144GeoExt.tree.LayerNodeUI implementations. If the optional uiProvider
145attribute for child nodes is a string rather than a reference to a
146TreeNodeUI implementation, then that string value is used as a
147property name in the uiProviders object. If not provided, the
148uiProviders object will be taken from the ownerTree&#8217;s loader.</dd></dl>
149
150</div>
151<div class="section" id="public-methods">
152<h2>Public Methods<a class="headerlink" href="#public-methods" title="Permalink to this headline">¶</a></h2>
153<p>Public methods in addition to those
154listed for <a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable">Ext.util.Observable</a>.</p>
155<dl class="method">
156<dt id="GeoExt.tree.LayerLoader.createNode">
157<tt class="descclassname">LayerLoader.</tt><tt class="descname">createNode</tt><big>(</big><big>)</big><a class="headerlink" href="#GeoExt.tree.LayerLoader.createNode" title="Permalink to this definition">¶</a></dt>
158<dd><table class="docutils field-list" frame="void" rules="none">
159<col class="field-name" />
160<col class="field-body" />
161<tbody valign="top">
162<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>attr</em> &#8211; <tt class="docutils literal"><span class="pre">Object</span></tt> attributes for the new node</td>
163</tr>
164</tbody>
165</table>
166<p>Override this function for custom TreeNode node implementation, or to
167modify the attributes at creation time.</p>
168</dd></dl>
169
170</div>
171<div class="section" id="events">
172<h2>Events<a class="headerlink" href="#events" title="Permalink to this headline">¶</a></h2>
173<p>Events in addition to those
174listed for <a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.util.Observable">Ext.util.Observable</a>.</p>
175<dl class="describe">
176<dt>
177<tt class="descname">beforeload</tt></dt>
178<dd><p>Triggered before loading children. Return false to avoid
179loading children.</p>
180<p>Listener arguments:</p>
181<ul>
182<li><p class="first">loader - <a title="GeoExt.tree.LayerLoader" class="reference internal" href="#GeoExt.tree.LayerLoader"><tt class="xref docutils literal"><span class="pre">GeoExt.tree.LayerLoader</span></tt></a> this loader</p>
183</li>
184<li><dl class="first docutils">
185<dt>node - <tt class="docutils literal"><span class="pre">Ex.tree.TreeNode</span></tt> the node that this loader is</dt>
186<dd><p class="first last">configured with</p>
187</dd>
188</dl>
189</li>
190</ul>
191</dd></dl>
192
193<dl class="describe">
194<dt>
195<tt class="descname">load</tt></dt>
196<dd><p>Triggered after children wer loaded.</p>
197<p>Listener arguments:</p>
198<ul>
199<li><p class="first">loader - <a title="GeoExt.tree.LayerLoader" class="reference internal" href="#GeoExt.tree.LayerLoader"><tt class="xref docutils literal"><span class="pre">GeoExt.tree.LayerLoader</span></tt></a> this loader</p>
200</li>
201<li><dl class="first docutils">
202<dt>node - <tt class="docutils literal"><span class="pre">Ex.tree.TreeNode</span></tt> the node that this loader is</dt>
203<dd><p class="first last">configured with</p>
204</dd>
205</dl>
206</li>
207</ul>
208</dd></dl>
209
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