95c178adf2
unnamed contributor on OpenLayers trac. (Closes #1751) git-svn-id: http://svn.openlayers.org/trunk/openlayers@8942 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
/* Copyright (c) 2006-2008 MetaCarta, Inc., published under the Clear BSD
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* license. See http://svn.openlayers.org/trunk/openlayers/license.txt for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*/
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/**
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* Class: OpenLayers.Control.Scale
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* The Scale control displays the current map scale as a ratio (e.g. Scale =
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* 1:1M). By default it is displayed in the lower right corner of the map.
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*
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.Scale = OpenLayers.Class(OpenLayers.Control, {
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/**
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* Parameter: element
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* {DOMElement}
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*/
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element: null,
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/**
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* Constructor: OpenLayers.Control.Scale
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*
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* Parameters:
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* element - {DOMElement}
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* options - {Object}
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*/
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initialize: function(element, options) {
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OpenLayers.Control.prototype.initialize.apply(this, [options]);
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this.element = OpenLayers.Util.getElement(element);
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},
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/**
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* Method: draw
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*
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* Returns:
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* {DOMElement}
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*/
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draw: function() {
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OpenLayers.Control.prototype.draw.apply(this, arguments);
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if (!this.element) {
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this.element = document.createElement("div");
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this.div.appendChild(this.element);
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}
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this.map.events.register( 'moveend', this, this.updateScale);
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this.updateScale();
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return this.div;
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},
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/**
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* Method: updateScale
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*/
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updateScale: function() {
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var scale = this.map.getScale();
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if (!scale) {
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return;
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}
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if (scale >= 9500 && scale <= 950000) {
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scale = Math.round(scale / 1000) + "K";
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} else if (scale >= 950000) {
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scale = Math.round(scale / 1000000) + "M";
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} else {
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scale = Math.round(scale);
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}
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this.element.innerHTML = OpenLayers.i18n("scale", {'scaleDenom':scale});
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},
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CLASS_NAME: "OpenLayers.Control.Scale"
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});
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