/* Copyright (c) 2006-2007 MetaCarta, Inc., published under the BSD license. * See http://svn.openlayers.org/trunk/openlayers/release-license.txt  * for the full text of the license. *//** * @requires OpenLayers/Control.js *  * Class: OpenLayers.Control.MousePosition */OpenLayers.Control.MousePosition = OpenLayers.Class(OpenLayers.Control, {        /**      * Property: element     * {DOMElement}      */    element: null,        /**      * APIProperty: prefix     */    prefix: '',        /**      * APIProperty: separator     * {String}     */    separator: ', ',        /**      * APIProperty: suffix     * {String}     */    suffix: '',        /**      * APIProperty: numDigits     * {Integer}     */    numdigits: 5,        /**      * APIProperty: granularity     * {Integer}      */    granularity: 10,        /**      * Property: lastXy     * {<OpenLayers.LonLat>}     */    lastXy: null,        /**     * Constructor: OpenLayers.Control.MousePosition     *      * Parameters:     * options - {DOMElement} Options for control.     */    initialize: function(options) {        OpenLayers.Control.prototype.initialize.apply(this, arguments);    },    /**     * Method: destroy     */     destroy: function() {         if (this.map) {             this.map.events.unregister('mousemove', this, this.redraw);         }         OpenLayers.Control.prototype.destroy.apply(this, arguments);     },    /**     * Method: draw     * {DOMElement}     */        draw: function() {        OpenLayers.Control.prototype.draw.apply(this, arguments);        if (!this.element) {            this.div.left = "";            this.div.top = "";            this.div.className = this.displayClass;            this.element = this.div;        }                this.redraw();        return this.div;    },       /**     * Method: redraw       */    redraw: function(evt) {        var lonLat;        if (evt == null) {            lonLat = new OpenLayers.LonLat(0, 0);        } else {            if (this.lastXy == null ||                Math.abs(evt.xy.x - this.lastXy.x) > this.granularity ||                Math.abs(evt.xy.y - this.lastXy.y) > this.granularity)            {                this.lastXy = evt.xy;                return;            }            lonLat = this.map.getLonLatFromPixel(evt.xy);            this.lastXy = evt.xy;        }                var digits = parseInt(this.numdigits);        var newHtml =            this.prefix +            lonLat.lon.toFixed(digits) +            this.separator +             lonLat.lat.toFixed(digits) +            this.suffix;        if (newHtml != this.element.innerHTML) {            this.element.innerHTML = newHtml;        }    },    /**      * Method: setMap     */    setMap: function() {        OpenLayers.Control.prototype.setMap.apply(this, arguments);        this.map.events.register( 'mousemove', this, this.redraw);    },         CLASS_NAME: "OpenLayers.Control.MousePosition"});