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91  <div class="section" id="geoext-data-scalestore">
92<h1><a title="GeoExt.data.ScaleStore" class="reference internal" href="#GeoExt.data.ScaleStore"><tt class="xref docutils literal"><span class="pre">GeoExt.data.ScaleStore</span></tt></a><a class="headerlink" href="#geoext-data-scalestore" title="Permalink to this headline">¶</a></h1>
93<dl class="meta docutils">
94<dt>Extends</dt>
95<dd><ul class="first last simple">
96<li><a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.data.Store">Ext.data.Store</a></li>
97</ul>
98</dd>
99</dl>
100<dl class="class">
101<dt id="GeoExt.data.ScaleStore">
102<em class="property">class </em><tt class="descclassname">GeoExt.data.</tt><tt class="descname">ScaleStore</tt><a class="headerlink" href="#GeoExt.data.ScaleStore" title="Permalink to this definition">¶</a></dt>
103<dd><p>A store that contains a cache of available zoom levels.  The store can
104optionally be kept synchronized with an <tt class="docutils literal"><span class="pre">OpenLayers.Map</span></tt> or
105<a title="GeoExt.MapPanel" class="reference external" href="../widgets/MapPanel.html#GeoExt.MapPanel"><tt class="xref docutils literal"><span class="pre">GeoExt.MapPanel</span></tt></a> object.</p>
106<p>Records have the following fields:</p>
107<ul class="simple">
108<li>level - <tt class="docutils literal"><span class="pre">Number</span></tt>  The zoom level.</li>
109<li>scale - <tt class="docutils literal"><span class="pre">Number</span></tt> The scale denominator.</li>
110<li>resolution - <tt class="docutils literal"><span class="pre">Number</span></tt> The map units per pixel.</li>
111</ul>
112</dd></dl>
113
114<div class="section" id="config-options">
115<h2>Config Options<a class="headerlink" href="#config-options" title="Permalink to this headline">¶</a></h2>
116<p>Configuration properties in addition to
117those listed for <a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.data.Store">Ext.data.Store</a>.</p>
118<dl class="describe">
119<dt>
120<tt class="descname">map</tt></dt>
121<dd><tt class="docutils literal"><span class="pre">OpenLayers.Map</span></tt> or <a title="GeoExt.MapPanel" class="reference external" href="../widgets/MapPanel.html#GeoExt.MapPanel"><tt class="xref docutils literal"><span class="pre">GeoExt.MapPanel</span></tt></a>
122Optional map or map panel from which to derive scale values.</dd></dl>
123
124</div>
125<div class="section" id="public-methods">
126<h2>Public Methods<a class="headerlink" href="#public-methods" title="Permalink to this headline">¶</a></h2>
127<p>Public methods in addition to those
128listed for <a class="reference external" href="http://dev.sencha.com/deploy/dev/docs/?class=Ext.data.Store">Ext.data.Store</a>.</p>
129<dl class="method">
130<dt id="GeoExt.data.ScaleStore.bind">
131<tt class="descclassname">ScaleStore.</tt><tt class="descname">bind</tt><big>(</big><big>)</big><a class="headerlink" href="#GeoExt.data.ScaleStore.bind" title="Permalink to this definition">¶</a></dt>
132<dd><table class="docutils field-list" frame="void" rules="none">
133<col class="field-name" />
134<col class="field-body" />
135<tbody valign="top">
136<tr class="field"><th class="field-name">Parameter:</th><td class="field-body"><em>map</em> &#8211; <a title="GeoExt.MapPanel" class="reference external" href="../widgets/MapPanel.html#GeoExt.MapPanel"><tt class="xref docutils literal"><span class="pre">GeoExt.MapPanel</span></tt></a> or <tt class="docutils literal"><span class="pre">OpenLayers.Map</span></tt> Panel or map
137to which we should bind.</td>
138</tr>
139</tbody>
140</table>
141<p>Bind this store to a map; that is, maintain the zoom list in sync with
142the map&#8217;s current configuration.  If the map does not currently have a
143set scale list, then the store will remain empty until the map is
144configured with one.</p>
145</dd></dl>
146
147<dl class="method">
148<dt id="GeoExt.data.ScaleStore.unbind">
149<tt class="descclassname">ScaleStore.</tt><tt class="descname">unbind</tt><big>(</big><big>)</big><a class="headerlink" href="#GeoExt.data.ScaleStore.unbind" title="Permalink to this definition">¶</a></dt>
150<dd>Un-bind this store from the map to which it is currently bound.  The
151currently stored zoom levels will remain, but no further changes from
152the map will affect it.</dd></dl>
153
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