| /* 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/Console.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Pixel | |
| * This class represents a screen coordinate, in x and y coordinates | |
| */ | |
| OpenLayers.Pixel = OpenLayers.Class({ | |
| /** | |
| * APIProperty: x | |
| * {Number} The x coordinate | |
| */ | |
| x: 0.0, | |
| /** | |
| * APIProperty: y | |
| * {Number} The y coordinate | |
| */ | |
| y: 0.0, | |
| /** | |
| * Constructor: OpenLayers.Pixel | |
| * Create a new OpenLayers.Pixel instance | |
| * | |
| * Parameters: | |
| * x - {Number} The x coordinate | |
| * y - {Number} The y coordinate | |
| * | |
| * Returns: | |
| * An instance of OpenLayers.Pixel | |
| */ | |
| initialize: function(x, y) { | |
| this.x = parseFloat(x); | |
| this.y = parseFloat(y); | |
| }, | |
| /** | |
| * Method: toString | |
| * Cast this object into a string | |
| * | |
| * Returns: | |
| * {String} The string representation of Pixel. ex: "x=200.4,y=242.2" | |
| */ | |
| toString:function() { | |
| return ("x=" + this.x + ",y=" + this.y); | |
| }, | |
| /** | |
| * APIMethod: clone | |
| * Return a clone of this pixel object | |
| * | |
| * Returns: | |
| * {<OpenLayers.Pixel>} A clone pixel | |
| */ | |
| clone:function() { | |
| return new OpenLayers.Pixel(this.x, this.y); | |
| }, | |
| /** | |
| * APIMethod: equals | |
| * Determine whether one pixel is equivalent to another | |
| * | |
| * Parameters: | |
| * px - {<OpenLayers.Pixel>} | |
| * | |
| * Returns: | |
| * {Boolean} The point passed in as parameter is equal to this. Note that | |
| * if px passed in is null, returns false. | |
| */ | |
| equals:function(px) { | |
| var equals = false; | |
| if (px != null) { | |
| equals = ((this.x == px.x && this.y == px.y) || | |
| (isNaN(this.x) && isNaN(this.y) && isNaN(px.x) && isNaN(px.y))); | |
| } | |
| return equals; | |
| }, | |
| /** | |
| * APIMethod: add | |
| * | |
| * Parameters: | |
| * x - {Integer} | |
| * y - {Integer} | |
| * | |
| * Returns: | |
| * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the | |
| * values passed in. | |
| */ | |
| add:function(x, y) { | |
| if ( (x == null) || (y == null) ) { | |
| var msg = OpenLayers.i18n("pixelAddError"); | |
| OpenLayers.Console.error(msg); | |
| return null; | |
| } | |
| return new OpenLayers.Pixel(this.x + x, this.y + y); | |
| }, | |
| /** | |
| * APIMethod: offset | |
| * | |
| * Parameters | |
| * px - {<OpenLayers.Pixel>} | |
| * | |
| * Returns: | |
| * {<OpenLayers.Pixel>} A new Pixel with this pixel's x&y augmented by the | |
| * x&y values of the pixel passed in. | |
| */ | |
| offset:function(px) { | |
| var newPx = this.clone(); | |
| if (px) { | |
| newPx = this.add(px.x, px.y); | |
| } | |
| return newPx; | |
| }, | |
| CLASS_NAME: "OpenLayers.Pixel" | |
| }); | |