2d29236fb0
git-svn-id: http://svn.openlayers.org/trunk/openlayers@11721 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
134 lines
4.6 KiB
JavaScript
134 lines
4.6 KiB
JavaScript
/* Copyright (c) 2006-2011 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.TARGET_NODE>} or
|
|
* {<OpenLayers.Layer.PointTrack.SOURCE_NODE>} optional. If the lines
|
|
* should get the data/attributes from one of the two points it is
|
|
* composed of, which one should it be?
|
|
*/
|
|
dataFrom: null,
|
|
|
|
/**
|
|
* APIProperty:
|
|
* styleFrom - {<OpenLayers.Layer.PointTrack.TARGET_NODE>} or
|
|
* {<OpenLayers.Layer.PointTrack.SOURCE_NODE>} optional. If the lines
|
|
* should get the style from one of the two points it is composed of,
|
|
* which one should it be?
|
|
*/
|
|
styleFrom: 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>)}
|
|
* options - {Object}
|
|
*
|
|
* Supported options:
|
|
* silent - {Boolean} true to suppress (before)feature(s)added events
|
|
*/
|
|
addNodes: function(pointFeatures, options) {
|
|
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 style = (this.styleFrom != null) ?
|
|
(pointFeatures[i+this.styleFrom].style) :
|
|
null;
|
|
var line = new OpenLayers.Geometry.LineString([startPoint,
|
|
endPoint]);
|
|
|
|
lines[i-1] = new OpenLayers.Feature.Vector(line, attributes,
|
|
style);
|
|
}
|
|
|
|
startPoint = endPoint;
|
|
}
|
|
|
|
this.addFeatures(lines, options);
|
|
},
|
|
|
|
CLASS_NAME: "OpenLayers.Layer.PointTrack"
|
|
});
|
|
|
|
/**
|
|
* Constant: OpenLayers.Layer.PointTrack.SOURCE_NODE
|
|
* {Number} value for <OpenLayers.Layer.PointTrack.dataFrom> and
|
|
* <OpenLayers.Layer.PointTrack.styleFrom>
|
|
*/
|
|
OpenLayers.Layer.PointTrack.SOURCE_NODE = -1;
|
|
|
|
/**
|
|
* Constant: OpenLayers.Layer.PointTrack.TARGET_NODE
|
|
* {Number} value for <OpenLayers.Layer.PointTrack.dataFrom> and
|
|
* <OpenLayers.Layer.PointTrack.styleFrom>
|
|
*/
|
|
OpenLayers.Layer.PointTrack.TARGET_NODE = 0;
|
|
|
|
/**
|
|
* Constant: OpenLayers.Layer.PointTrack.dataFrom
|
|
* {Object} with the following keys - *deprecated*
|
|
* - 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};
|