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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>AoiBoxOL.js</h2>
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<h4>Summary</h4>
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<p>
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No overview generated for 'AoiBoxOL.js'<BR/><BR/>
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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="AoiBoxOL.html">AoiBoxOL</a></b></td>
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<td> </td>
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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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Author: Mike Adair mike.adairATccrs.nrcan.gc.ca
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License: LGPL as per: http://www.gnu.org/copyleft/lesser.html
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$Id: AoiBoxDHTML.js,v 1.2 2008/03/18 09:59:16 terral Exp $
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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/WidgetBase.js"</span>);
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<span class="comment">/**
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* Widget to draw an Area Of Interest box of a model. The box can be drawn with
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* the paint() method and is registered as a listener of the context AOI property.
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* This object works entirely in pixel/line coordinate space and knows nothing
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* about geography. This widget uses DHTML methods to draw the box. Since it
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* does not support a targetModel property, it has to be defined as a child widget
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* of the context of the map that the box should be drawn into.
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* WARNING: This widget cannot be used in maps that use button controls.
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* Button controls take care of aoi handling themselves.
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* It is designed for use in locator map setups only.
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* See also MAP-312
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* <span class="attrib">@deprecated</span>
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* <span class="attrib">@constructor</span>
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* <span class="attrib">@base</span> WidgetBase
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* <span class="attrib">@param</span> widgetNode The node for this object from the Config file.
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* <span class="attrib">@param</span> model The model that contains this object.
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*/</span>
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<span class="reserved">function</span> AoiBoxOL(widgetNode, model) {
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WidgetBase.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.AoiBoxOL'</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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}
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<span class="reserved">else</span>{
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var XY = <span class="reserved">this</span>.map.getLonLatFromPixel(
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new OpenLayers.Pixel(position.x, position.y));
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var bounds = new OpenLayers.Bounds(XY.lon, XY.lat,
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XY.lon,XY.lat);
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}
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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.model.setParam(<span class="literal">"aoi"</span>, new Array(ul, lr));
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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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<span class="reserved">this</span>.init = <span class="reserved">function</span>(objRef) {
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var Control = objRef.createControl(objRef);
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var ct=new Control();
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objRef.model.map.addControl(ct);
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ct.activate();
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}
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<span class="reserved">this</span>.model.addListener(<span class="literal">"loadModel"</span>,<span class="reserved">this</span>.init, <span class="reserved">this</span>);
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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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<span class="reserved">if</span>(objRef.model.map){
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var ext = objRef.model.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.model.aoiBoxLayer = new OpenLayers.Layer.Boxes(<span class="literal">'Boxes'</span>);
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objRef.model.map.addLayer(objRef.model.aoiBoxLayer);
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var box = new OpenLayers.Marker.Box(bounds);
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objRef.model.aoiBoxLayer.addMarker(box);
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}
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}
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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.model.aoiBoxLayer) {
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objRef.model.aoiBoxLayer.destroy();
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}
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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>.model.addListener(<span class="literal">'aoi'</span>, <span class="reserved">this</span>.clearAoiBox, <span class="reserved">this</span>);
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<span class="reserved">this</span>.model.addListener(<span class="literal">'aoi'</span>, <span class="reserved">this</span>.drawAoiBox, <span class="reserved">this</span>);
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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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