| /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for | |
| * full list of contributors). Published under the Clear BSD license. | |
| * See http://svn.openlayers.org/trunk/openlayers/license.txt for the | |
| * full text of the license. */ | |
| /** | |
| * @requires OpenLayers/Control.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Control.MousePosition | |
| * The MousePosition control displays geographic coordinates of the mouse | |
| * pointer, as it is moved about the map. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Control> | |
| */ | |
| OpenLayers.Control.MousePosition = OpenLayers.Class(OpenLayers.Control, { | |
| /** | |
| * APIProperty: autoActivate | |
| * {Boolean} Activate the control when it is added to a map. Default is | |
| * true. | |
| */ | |
| autoActivate: true, | |
| /** | |
| * Property: element | |
| * {DOMElement} | |
| */ | |
| element: null, | |
| /** | |
| * APIProperty: prefix | |
| * {String} | |
| */ | |
| prefix: '', | |
| /** | |
| * APIProperty: separator | |
| * {String} | |
| */ | |
| separator: ', ', | |
| /** | |
| * APIProperty: suffix | |
| * {String} | |
| */ | |
| suffix: '', | |
| /** | |
| * APIProperty: numDigits | |
| * {Integer} | |
| */ | |
| numDigits: 5, | |
| /** | |
| * APIProperty: granularity | |
| * {Integer} | |
| */ | |
| granularity: 10, | |
| /** | |
| * APIProperty: emptyString | |
| * {String} Set this to some value to set when the mouse is outside the | |
| * map. | |
| */ | |
| emptyString: null, | |
| /** | |
| * Property: lastXy | |
| * {<OpenLayers.Pixel>} | |
| */ | |
| lastXy: null, | |
| /** | |
| * APIProperty: displayProjection | |
| * {<OpenLayers.Projection>} The projection in which the | |
| * mouse position is displayed | |
| */ | |
| displayProjection: null, | |
| /** | |
| * Constructor: OpenLayers.Control.MousePosition | |
| * | |
| * Parameters: | |
| * options - {Object} Options for control. | |
| */ | |
| initialize: function(options) { | |
| OpenLayers.Control.prototype.initialize.apply(this, arguments); | |
| }, | |
| /** | |
| * Method: destroy | |
| */ | |
| destroy: function() { | |
| this.deactivate(); | |
| OpenLayers.Control.prototype.destroy.apply(this, arguments); | |
| }, | |
| /** | |
| * APIMethod: activate | |
| */ | |
| activate: function() { | |
| if (OpenLayers.Control.prototype.activate.apply(this, arguments)) { | |
| this.map.events.register('mousemove', this, this.redraw); | |
| this.map.events.register('mouseout', this, this.reset); | |
| this.redraw(); | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| }, | |
| /** | |
| * APIMethod: deactivate | |
| */ | |
| deactivate: function() { | |
| if (OpenLayers.Control.prototype.deactivate.apply(this, arguments)) { | |
| this.map.events.unregister('mousemove', this, this.redraw); | |
| this.map.events.unregister('mouseout', this, this.reset); | |
| this.element.innerHTML = ""; | |
| return true; | |
| } else { | |
| return false; | |
| } | |
| }, | |
| /** | |
| * Method: draw | |
| * {DOMElement} | |
| */ | |
| draw: function() { | |
| OpenLayers.Control.prototype.draw.apply(this, arguments); | |
| if (!this.element) { | |
| this.div.left = ""; | |
| this.div.top = ""; | |
| this.element = this.div; | |
| } | |
| return this.div; | |
| }, | |
| /** | |
| * Method: redraw | |
| */ | |
| redraw: function(evt) { | |
| var lonLat; | |
| if (evt == null) { | |
| this.reset(); | |
| return; | |
| } 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); | |
| if (!lonLat) { | |
| // map has not yet been properly initialized | |
| return; | |
| } | |
| if (this.displayProjection) { | |
| lonLat.transform(this.map.getProjectionObject(), | |
| this.displayProjection ); | |
| } | |
| this.lastXy = evt.xy; | |
| } | |
| var newHtml = this.formatOutput(lonLat); | |
| if (newHtml != this.element.innerHTML) { | |
| this.element.innerHTML = newHtml; | |
| } | |
| }, | |
| /** | |
| * Method: reset | |
| */ | |
| reset: function(evt) { | |
| if (this.emptyString != null) { | |
| this.element.innerHTML = this.emptyString; | |
| } | |
| }, | |
| /** | |
| * Method: formatOutput | |
| * Override to provide custom display output | |
| * | |
| * Parameters: | |
| * lonLat - {<OpenLayers.LonLat>} Location to display | |
| */ | |
| formatOutput: function(lonLat) { | |
| var digits = parseInt(this.numDigits); | |
| var newHtml = | |
| this.prefix + | |
| lonLat.lon.toFixed(digits) + | |
| this.separator + | |
| lonLat.lat.toFixed(digits) + | |
| this.suffix; | |
| return newHtml; | |
| }, | |
| CLASS_NAME: "OpenLayers.Control.MousePosition" | |
| }); | |