/lib/spatial/mapbuilder/docs/jsdoc/overview-summary-SetAoi.js.html - Annotate - Metacat - Ecoinformatics Redmine

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<a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008 Overview

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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>

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	   <h2>SetAoi.js</h2>

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<h4>Summary</h4>

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		No overview generated for 'SetAoi.js'<BR/><BR/>

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        <b>Class Summary</b>

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    <tr bgcolor="white" class="TableRowColor">

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    <td width="15%"><b><a href="SetAoi.html">SetAoi</a></b></td>

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    <td>&nbsp;</td>

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<!-- ========== 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: SetAoi.js 3052 2007-08-01 21:25:21Z 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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 * Set AOI 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> SetAoi(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.SetAoi'</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>.aoiBox}, {keyMask: <span class="reserved">this</span>.keyMask} );

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},

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      aoiBox: <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 = <span class="reserved">this</span>.map.getLonLatFromPixel(

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               new OpenLayers.Pixel(position.left, position.bottom));

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          var maxXY = <span class="reserved">this</span>.map.getLonLatFromPixel(

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               new OpenLayers.Pixel(position.right, position.top));

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          var bounds = new OpenLayers.Bounds(minXY.lon, minXY.lat,

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               maxXY.lon, maxXY.lat);

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          var bboxOL = bounds.toBBOX().split(<span class="literal">','</span>);

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          var ul = new Array(bboxOL[0],bboxOL[3]);

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          var lr = new Array(bboxOL[2],bboxOL[1]);

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          objRef.targetContext.setParam(<span class="literal">"aoi"</span>, new Array(ul, lr));

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          objRef.drawAoiBox(objRef);

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});

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<span class="comment">

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    // adds a listener to the context to clear the AOI box when AOI changes</span>

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    <span class="reserved">this</span>.targetContext.addListener(<span class="literal">'aoi'</span>, <span class="reserved">this</span>.clearAoiBox, <span class="reserved">this</span>);

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    <span class="reserved">return</span> Control;

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  <span class="comment">/**

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   * Draws a bounding box around the current AOI.

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   * <span class="attrib">@param</span> objRef reference to this widget

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   */</span>

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  <span class="reserved">this</span>.drawAoiBox = <span class="reserved">function</span>(objRef) {

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    var ext = objRef.targetContext.getParam(<span class="literal">'aoi'</span>);

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    var bounds = new OpenLayers.Bounds(ext[0][0], ext[1][1], ext[1][0], ext[0][1]);

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    objRef.targetContext.aoiBoxLayer = new OpenLayers.Layer.Boxes(<span class="literal">'Boxes'</span>);

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    objRef.targetContext.map.addLayer(objRef.targetContext.aoiBoxLayer);

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    var box = new OpenLayers.Marker.Box(bounds);

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    objRef.targetContext.aoiBoxLayer.addMarker(box);

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  <span class="comment">/**

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   * Clears the AOI box.

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   * <span class="attrib">@param</span> objRef reference to this widget

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   */</span>

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  <span class="reserved">this</span>.clearAoiBox = <span class="reserved">function</span>(objRef) {

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    <span class="reserved">if</span> (objRef.targetContext.aoiBoxLayer) {

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      objRef.targetContext.aoiBoxLayer.destroy();

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}</pre>

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<b><a href='http://mapbuilder.sourceforge.net'>Community Map Builder</a> 27 Apr 2008</b></em>

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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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