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comparison geotemco/js/Map/MapDataSource.js @ 0:57bde4830927

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author Zoe Hong <zhong@mpiwg-berlin.mpg.de>
date Tue, 24 Mar 2015 11:37:17 +0100
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-1:000000000000 0:57bde4830927
1 /*
2 * MapDataSource.js
3 *
4 * Copyright (c) 2012, Stefan Jänicke. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 3 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19 * MA 02110-1301 USA
20 */
21
22 /**
23 * @class MapDataSource
24 * implementation for aggregation of map items
25 * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
26 * @release 1.0
27 * @release date: 2012-07-27
28 * @version date: 2012-07-27
29 *
30 * @param {MapWidget} parent Widget
31 * @param {JSON} options map configuration
32 */
33 function MapDataSource(parent, options) {
34
35 this.parent = parent;
36 this.olMap = parent.openlayersMap;
37 this.circleSets = [];
38 this.binning = new Binning(this.olMap, options);
39
40 };
41
42 MapDataSource.prototype = {
43
44 /**
45 * initializes the MapDataSource
46 * @param {MapObject[][]} mapObjects an array of map objects of different sets
47 */
48 initialize : function(mapObjects) {
49
50 if (mapObjects != this.mapObjects) {
51 this.binning.reset();
52 this.binning.setObjects(mapObjects);
53 }
54 this.mapObjects = mapObjects;
55
56 var set = this.binning.getSet();
57 this.circleSets = set.circleSets;
58 this.binSets = set.binSets;
59 this.hashMapping = set.hashMaps;
60
61 },
62
63 getObjectsByZoom : function() {
64 var zoom = Math.floor(this.parent.getZoom());
65 if (this.circleSets.length < zoom) {
66 return null;
67 }
68 return this.circleSets[zoom];
69 },
70
71 getAllObjects : function() {
72 if (this.circleSets.length == 0) {
73 return null;
74 }
75 return this.circleSets;
76 },
77
78 getAllBins : function() {
79 if (this.binSets.length == 0) {
80 return null;
81 }
82 return this.binSets;
83 },
84
85 clearOverlay : function() {
86 var zoom = Math.floor(this.parent.getZoom());
87 var circles = this.circleSets[zoom];
88 for (var i in circles ) {
89 for (var j in circles[i] ) {
90 circles[i][j].reset();
91 }
92 }
93 },
94
95 setOverlay : function(mapObjects) {
96 var zoom = Math.floor(this.parent.getZoom());
97 for (var j in mapObjects ) {
98 for (var k in mapObjects[j] ) {
99 var o = mapObjects[j][k];
100 if (o.isGeospatial) {
101 this.hashMapping[zoom][j][o.index].overlayElements.push(o);
102 this.hashMapping[zoom][j][o.index].overlay += o.weight;
103 }
104 }
105 }
106 },
107
108 size : function() {
109 if (this.circleSets.length == 0) {
110 return 0;
111 }
112 return this.circleSets[0].length;
113 },
114
115 getCircle : function(index, id) {
116 var zoom = Math.floor(this.parent.getZoom());
117 return this.hashMapping[zoom][index][id];
118 }
119 };