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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>MapScaleText.js</h2>
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<h4>Summary</h4>
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No overview generated for 'MapScaleText.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="MapScaleText.html">MapScaleText</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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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: MapScaleText.js 3242 2007-09-11 11:15:21Z gjvoosten $
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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/WidgetBaseXSL.js"</span>);
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<span class="comment">/**
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* Widget to display the scale of a map. The model of this widget
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* must have an extent object associated with it which is the case when the
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* model has a MapContanier widget.
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*
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* <span class="attrib">@constructor</span>
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* <span class="attrib">@base</span> WidgetBaseXSL
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* <span class="attrib">@param</span> widgetNode This widget's object node from the configuration document.
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* <span class="attrib">@param</span> model The model that this widget is a view of.
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*/</span>
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<span class="reserved">function</span> MapScaleText(widgetNode, model) {
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WidgetBaseXSL.apply(<span class="reserved">this</span>,new Array(widgetNode, model));
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<span class="comment">/**
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* Handles submission of the form (via javascript in an <a> tag or onsubmit handler)
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*/</span>
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<span class="reserved">this</span>.submitForm = <span class="reserved">function</span>() {
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var mapScaleTextForm = document.getElementById(<span class="reserved">this</span>.formName);
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var newScale = mapScaleTextForm.mapScale.value;
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<span class="reserved">this</span>.model.map.zoomToScale(newScale.split(<span class="literal">","</span>).join(<span class="literal">""</span>));
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<span class="reserved">return</span> false; //prevent the form from actually being submitted
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}
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<span class="comment">/**
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* handles keypress events to filter out everything except "enter".
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* Pressing the "enter" key will trigger a form submit
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* <span class="attrib">@param</span> event the event object passed in for Mozilla; IE uses window.event
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*/</span>
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<span class="reserved">this</span>.handleKeyPress = <span class="reserved">function</span>(event) {
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var keycode;
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var target;
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<span class="reserved">if</span> (event){
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<span class="comment"> //Mozilla</span>
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keycode=event.which;
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target=event.currentTarget;
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}<span class="reserved">else</span>{
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<span class="comment"> //IE</span>
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keycode=window.event.keyCode;
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target=window.event.srcElement.form;
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}
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<span class="reserved">if</span> (keycode == 13) { //enter key
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target.parentWidget.submitForm();
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<span class="reserved">return</span> false
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}
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}
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<span class="comment">/**
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* outputs the scale value to the form element
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* <span class="attrib">@param</span> objRef Pointer to this widget object.
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*/</span>
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<span class="reserved">this</span>.showScale = <span class="reserved">function</span>(objRef) {
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var mapScaleTextForm = document.getElementById(objRef.formName);
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<span class="reserved">if</span> (mapScaleTextForm) {
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var newScale = Math.round(objRef.model.map.getScale());
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var parts = new Array();
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<span class="reserved">while</span> (newScale>=1000.0) {
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var newPart = newScale/1000.0;
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newScale = Math.floor(newPart);
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var strPart = leadingZeros(Math.round((newPart-newScale)*1000).toString(),3);
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parts.unshift(strPart);
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}
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parts.unshift(newScale);
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mapScaleTextForm.mapScale.value = parts.join(<span class="literal">","</span>);
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}
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}
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<span class="comment">/**
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* adds a bbox listener on the model
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*/</span>
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<span class="reserved">this</span>.model.addListener(<span class="literal">"bbox"</span>, <span class="reserved">this</span>.showScale, <span class="reserved">this</span>);
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<span class="reserved">this</span>.model.addListener(<span class="literal">"refresh"</span>, <span class="reserved">this</span>.showScale, <span class="reserved">this</span>);
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<span class="comment">/**
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* Called just before paint to set the map scale as stylesheet param
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* <span class="attrib">@param</span> objRef pointer to this object.
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*/</span>
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<span class="reserved">this</span>.prePaint = <span class="reserved">function</span>(objRef) {
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var mapScale = objRef.model.extent.getScale();
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<span class="reserved">this</span>.stylesheet.setParameter(<span class="literal">"mapScale"</span>, mapScale );
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}
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<span class="comment">/**
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* Refreshes the form and event handlers when this widget is painted.
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* <span class="attrib">@param</span> objRef Pointer to this CurorTrack object.
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*/</span>
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<span class="reserved">this</span>.postPaint = <span class="reserved">function</span>(objRef) {
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var mapScaleTextForm = document.getElementById(objRef.formName);
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mapScaleTextForm.parentWidget = objRef;
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mapScaleTextForm.onkeypress = objRef.handleKeyPress;
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objRef.showScale(objRef);
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}
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<span class="comment">
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//set some properties for the form output</span>
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<span class="reserved">this</span>.formName = <span class="literal">"MapScaleText_"</span> + mbIds.getId();
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<span class="reserved">this</span>.stylesheet.setParameter(<span class="literal">"formName"</span>, <span class="reserved">this</span>.formName);
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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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