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<title>
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<a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008 Overview
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</title>
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<td bgcolor="#EEEEFF" class="NavBarCell1"> <a href="overview-summary.html"><font class="NavBarFont1"><b>Overview</b></font></a> </td>
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<em>
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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//-->
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</script>
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<noscript>
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<a href="allclasses-noframe.html" target=""><b>All Classes</b></a>
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<!-- =========== END OF NAVBAR =========== -->
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<hr>
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<center>
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<h2>ZoomOut.js</h2>
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</center>
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<h4>Summary</h4>
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<p>
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No overview generated for 'ZoomOut.js'<BR/><BR/>
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</p>
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<table border="1" cellpadding="3" cellspacing="0" width="100%">
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<tr bgcolor="#CCCCFF" class="TableHeadingColor">
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<td colspan=2><font size="+2">
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<b>Class Summary</b>
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</font></td>
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</tr>
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<tr bgcolor="white" class="TableRowColor">
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<td width="15%"><b><a href="ZoomOut.html">ZoomOut</a></b></td>
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<td> </td>
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</tr>
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</table>
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<hr/>
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<!-- ========== METHOD SUMMARY =========== -->
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<!-- ========== END METHOD SUMMARY =========== -->
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<pre class="sourceview"><span class="comment">/*
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: ZoomOut.js 3894 2008-02-29 18:37:09Z ahocevar $
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*/</span>
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<span class="comment">
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// Ensure this object's dependancies are loaded.</span>
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mapbuilder.loadScript(baseDir+<span class="literal">"/widget/ButtonBase.js"</span>);
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mapbuilder.loadScript(baseDir+<span class="literal">"/util/openlayers/OpenLayers.js"</span>);
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<span class="comment">/**
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* Zoom Out button.
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* <span class="attrib">@base</span> ButtonBase
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* <span class="attrib">@author</span> Andreas Hocevar andreas.hocevarATgmail.com
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* <span class="attrib">@param</span> widgetNode The tool node from the Config XML file.
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* <span class="attrib">@param</span> model The ButtonBar widget.
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*/</span>
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<span class="reserved">function</span> ZoomOut(widgetNode, model) {
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ButtonBase.apply(<span class="reserved">this</span>, new Array(widgetNode, model));
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<span class="reserved">this</span>.cursor = <span class="literal">'crosshair'</span>;
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<span class="comment">/**
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* Interactive ZoomOut control.
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* <span class="attrib">@param</span> objRef reference to this object.
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* <span class="attrib">@return</span> {OpenLayers.Control} class of the OL control.
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*/</span>
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<span class="reserved">this</span>.createControl = <span class="reserved">function</span>(objRef) {
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var Control = OpenLayers.Class( OpenLayers.Control, {
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CLASS_NAME: <span class="literal">'mbControl.ZoomOut'</span>,
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type: OpenLayers.Control.TYPE_TOOL,
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draw: <span class="reserved">function</span>() {
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<span class="reserved">this</span>.handler = new OpenLayers.Handler.Box( <span class="reserved">this</span>,
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{done: <span class="reserved">this</span>.zoomBox}, {keyMask: <span class="reserved">this</span>.keyMask} );
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},
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zoomBox: <span class="reserved">function</span> (position) {
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<span class="reserved">if</span> (position instanceof OpenLayers.Bounds) {
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var minXY = new OpenLayers.Pixel(position.left, position.bottom);
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var maxXY = new OpenLayers.Pixel(position.right, position.top);
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var bounds = new OpenLayers.Bounds(minXY.x, minXY.y,
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maxXY.x, maxXY.y);
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var mapSize = (<span class="reserved">this</span>.map.getSize().w+<span class="reserved">this</span>.map.getSize().h)/2;
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var boxSize = (Math.abs(bounds.getWidth())+Math.abs(bounds.getHeight()))/2;
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var newScale = <span class="reserved">this</span>.map.getScale()*(mapSize/boxSize);
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<span class="reserved">this</span>.map.setCenter(bounds.getCenterLonLat());
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<span class="reserved">this</span>.map.zoomToScale(newScale);
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} <span class="reserved">else</span> { // it's a pixel
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<span class="reserved">this</span>.map.setCenter(<span class="reserved">this</span>.map.getLonLatFromPixel(position),
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parseInt(<span class="reserved">this</span>.map.getZoom() - 1));
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}
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}
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});
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<span class="reserved">return</span> Control;
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}
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}
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</pre>
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<td bgcolor="#EEEEFF" class="NavBarCell1"> <a href="overview-summary.html"><font class="NavBarFont1"><b>Overview</b></font></a> </td>
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<td bgcolor="#EEEEFF" align="right" valign="top"><em>
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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>
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</td>
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<script>
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<!--
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if(window==top) {
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document.writeln('<A HREF="allclasses-noframe.html" TARGET=""><B>All Classes</B></A>');
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//-->
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<div class="jsdoc_ctime">Documentation generated by <a href="http://jsdoc.sourceforge.net/" target="_parent">JSDoc</a> on Sun Apr 27 20:30:54 2008</div>
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