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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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<center>
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<h2>ZoomToAoi.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 'ZoomToAoi.js'<BR/><BR/>
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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="ZoomToAoi.html">ZoomToAoi</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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Dependancies: Context
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$Id: ZoomToAoi.js 3821 2008-02-01 13:58:30Z 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">"/tool/ToolBase.js"</span>);
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<span class="comment">/**
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* Controller for the locator map widget.
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* Specify the context that this widget follows by setting the targetModel
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* property in config.
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* This will display the AOI of the target model using the AoiBox tool.
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* This will also process mouse events (click and dragbox) to recenter the
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* target model and includes coordinate projection transformations if required.
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* Checking for extent limits is not yet implemented.
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*
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* WARNING: it is recommended to use the OverviewMap widget. However since the behavior
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* is slightly different from this widget, this one is still available.
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* See also MAP-300
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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> ToolBase
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* <span class="attrib">@author</span> Adair
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* <span class="attrib">@param</span> toolNode The tool node from the config document for this tool
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* <span class="attrib">@param</span> model Reference to the widget object that creates this tool
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*/</span>
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<span class="reserved">function</span> ZoomToAoi(toolNode, model) {
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ToolBase.apply(<span class="reserved">this</span>, new Array(toolNode, model));
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<span class="comment">/**
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* Target model loadModel change listener. This resets the projection objects
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* if the target model changes.
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* <span class="attrib">@param</span> tool Pointer to this ZoomToAoi object.
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*/</span>
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<span class="reserved">this</span>.initProj = <span class="reserved">function</span>( toolRef ) {
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<span class="reserved">if</span>( toolRef.model.doc && toolRef.targetModel.doc ) {
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<span class="reserved">if</span> ( toolRef.model.getSRS() != toolRef.targetModel.getSRS() ) {
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toolRef.model.proj = new OpenLayers.Projection( toolRef.model.getSRS() );
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toolRef.targetModel.proj = new OpenLayers.Projection( toolRef.targetModel.getSRS() );
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}
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}
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}
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<span class="reserved">this</span>.setListeners = <span class="reserved">function</span>( toolRef ) {
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toolRef.model.addListener( <span class="literal">"loadModel"</span>, toolRef.initProj, toolRef );
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toolRef.targetModel.addListener( <span class="literal">"loadModel"</span>, toolRef.initProj, toolRef );
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toolRef.initProj( toolRef );
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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>.setListeners, <span class="reserved">this</span>);
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<span class="comment">/**
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* Target model bbox change listener. This sets this model's AOI to be the
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* same as the target model bounding box.
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* <span class="attrib">@param</span> tool Pointer to this ZoomToAoi object.
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*/</span>
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<span class="reserved">this</span>.showTargetAoi = <span class="reserved">function</span>( tool ) {
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<span class="reserved">if</span>( tool.targetModel.doc ) {
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var bbox = tool.targetModel.getBoundingBox();
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var ul = new Array(bbox[0],bbox[3]);
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var lr = new Array(bbox[2],bbox[1]);
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<span class="reserved">if</span> ( tool.model.getSRS() != tool.targetModel.getSRS() ) {
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var ptUL=new OpenLayers.Geometry.Point(ul[0],ul[1]);
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var ptLR=new OpenLayers.Geometry.Point(lr[0],lr[1]);
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ptUL.transform(tool.targetModel.proj,tool.model.proj);
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ptLR.transform(tool.targetModel.proj,tool.model.proj);
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ul = new Array(ptUL.x,ptUL.y);
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lr = new Array(ptLR.x,ptLR.y);
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}
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tool.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">this</span>.firstInit = <span class="reserved">function</span>(tool) {
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tool.model.map.events.register(<span class="literal">'mouseup'</span>,tool, tool.mouseUpHandler);
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tool.targetModel.addListener( <span class="literal">"loadModel"</span>, tool.showTargetAoi, tool );
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tool.targetModel.addListener( <span class="literal">"bbox"</span>, tool.showTargetAoi, tool );
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tool.showTargetAoi(tool);
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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>.firstInit, <span class="reserved">this</span> );
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<span class="reserved">this</span>.clear = <span class="reserved">function</span>(tool) {
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<span class="reserved">if</span> (tool.model.map && tool.model.map.events) {
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tool.model.map.events.unregister(<span class="literal">'mouseup'</span>,tool, tool.mouseUpHandler);
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}
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}
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<span class="reserved">this</span>.model.addListener(<span class="literal">"clearModel"</span>, <span class="reserved">this</span>.clear, <span class="reserved">this</span>);
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}
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<span class="comment">/**
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* Process a mouse up action. This will recenter the target model's bbox
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* to be equal to this model's AOI.
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* <span class="attrib">@param</span> e OpenLayers event
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*/</span>
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ZoomToAoi.<span class="reserved">prototype</span>.mouseUpHandler = <span class="reserved">function</span>(e) {
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var bbox = <span class="reserved">this</span>.model.getParam(<span class="literal">"aoi"</span>);
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var ul = bbox[0];
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var lr = bbox[1];
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<span class="reserved">if</span> ( <span class="reserved">this</span>.model.getSRS() != <span class="reserved">this</span>.targetModel.getSRS() ) {
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<span class="comment"> //TBD: convert XY to lat/long first</span>
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var ptUL=new OpenLayers.Geometry.Point(ul[0],ul[1]);
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var ptLR=new OpenLayers.Geometry.Point(lr[0],lr[1]);
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ptUL.transform(<span class="reserved">this</span>.model.proj,<span class="reserved">this</span>.targetModel.proj);
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ptLR.transform(<span class="reserved">this</span>.model.proj,<span class="reserved">this</span>.targetModel.proj);
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ul = new Array(ptUL.x,ptUL.y);
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lr = new Array(ptLR.x,ptLR.y);
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}
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<span class="reserved">if</span> ( ( ul[0]==lr[0] ) && ( ul[1]==lr[1] ) ) {
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<span class="reserved">this</span>.targetModel.map.setCenter(new OpenLayers.LonLat(ul[0],ul[1]));
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} <span class="reserved">else</span> {
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<span class="reserved">this</span>.targetModel.map.zoomToExtent(new OpenLayers.Bounds(ul[0], lr[1], lr[0], ul[1]));
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}
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}
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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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