| /* 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/Layer/Vector.js | |
| * @requires OpenLayers/Console.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Layer.PointTrack | |
| * Vector layer to display ordered point features as a line, creating one | |
| * LineString feature for each pair of two points. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Layer.Vector> | |
| */ | |
| OpenLayers.Layer.PointTrack = OpenLayers.Class(OpenLayers.Layer.Vector, { | |
| /** | |
| * APIProperty: | |
| * dataFrom - {<OpenLayers.Layer.PointTrack.dataFrom>} optional. If the | |
| * lines should get the data/attributes from one of the two | |
| * points, creating it, which one should it be? | |
| */ | |
| dataFrom: null, | |
| /** | |
| * Constructor: OpenLayers.PointTrack | |
| * Constructor for a new OpenLayers.PointTrack instance. | |
| * | |
| * Parameters: | |
| * name - {String} name of the layer | |
| * options - {Object} Optional object with properties to tag onto the | |
| * instance. | |
| */ | |
| initialize: function(name, options) { | |
| OpenLayers.Layer.Vector.prototype.initialize.apply(this, arguments); | |
| }, | |
| /** | |
| * APIMethod: addNodes | |
| * Adds point features that will be used to create lines from, using point | |
| * pairs. The first point of a pair will be the source node, the second | |
| * will be the target node. | |
| * | |
| * Parameters: | |
| * pointFeatures - {Array(<OpenLayers.Feature>)} | |
| * | |
| */ | |
| addNodes: function(pointFeatures) { | |
| if (pointFeatures.length < 2) { | |
| OpenLayers.Console.error( | |
| "At least two point features have to be added to create" + | |
| "a line from"); | |
| return; | |
| } | |
| var lines = new Array(pointFeatures.length-1); | |
| var pointFeature, startPoint, endPoint; | |
| for(var i=0, len=pointFeatures.length; i<len; i++) { | |
| pointFeature = pointFeatures[i]; | |
| endPoint = pointFeature.geometry; | |
| if (!endPoint) { | |
| var lonlat = pointFeature.lonlat; | |
| endPoint = new OpenLayers.Geometry.Point(lonlat.lon, lonlat.lat); | |
| } else if(endPoint.CLASS_NAME != "OpenLayers.Geometry.Point") { | |
| OpenLayers.Console.error( | |
| "Only features with point geometries are supported."); | |
| return; | |
| } | |
| if(i > 0) { | |
| var attributes = (this.dataFrom != null) ? | |
| (pointFeatures[i+this.dataFrom].data || | |
| pointFeatures[i+this.dataFrom].attributes) : | |
| null; | |
| var line = new OpenLayers.Geometry.LineString([startPoint, | |
| endPoint]); | |
| lines[i-1] = new OpenLayers.Feature.Vector(line, attributes); | |
| } | |
| startPoint = endPoint; | |
| } | |
| this.addFeatures(lines); | |
| }, | |
| CLASS_NAME: "OpenLayers.Layer.PointTrack" | |
| }); | |
| /** | |
| * Constant: OpenLayers.Layer.PointTrack.dataFrom | |
| * {Object} with the following keys | |
| * - SOURCE_NODE: take data/attributes from the source node of the line | |
| * - TARGET_NODE: take data/attributes from the target node of the line | |
| */ | |
| OpenLayers.Layer.PointTrack.dataFrom = {'SOURCE_NODE': -1, 'TARGET_NODE': 0}; | |