place permalink "under" popup
[syp.git] / js / syp.js
1 /* Copyright (c) 2009 Arnaud Renevier, Inc, published under the modified BSD
2  * license. */
3
4 OpenLayers.Control.SypAttribution = OpenLayers.Class (OpenLayers.Control.Attribution, {
5     updateAttribution: function() {
6         var attributions = [SypStrings.propulsedByLink];
7         if (this.map && this.map.layers) {
8             for(var i=0, len=this.map.layers.length; i<len; i++) {
9                 var layer = this.map.layers[i];
10                 if (layer.attribution && layer.getVisibility()) {
11                     attributions.push( layer.attribution );
12                 }
13             }  
14             this.div.innerHTML = attributions.join(this.separator);
15         }
16     }
17 });
18
19 var SYP = {
20     Settings: {
21         MARKER_ICON: "openlayers/img/marker-blue.png",
22         MARKER_ICON_HEIGHT: 25,
23         MARKER_SELECT_ICON: "openlayers/img/marker-green.png",
24         MARKER_SELECT_ICON_HEIGHT: 25
25     },
26
27     map: null,
28     baseLayer: null,
29     dataLayer: null,
30     selectControl: null,
31
32     init: function() {
33         this.map = new OpenLayers.Map("map", {
34             controls:[
35                 new OpenLayers.Control.Navigation(),
36                 new OpenLayers.Control.PanZoom(),
37                 new OpenLayers.Control.Permalink(),
38                 new OpenLayers.Control.SypAttribution()
39             ],
40             projection: new OpenLayers.Projection("EPSG:900913"),
41             displayProjection: new OpenLayers.Projection("EPSG:4326")
42         } );
43
44         this.baseLayer = this.createBaseLayer();
45         this.dataLayer = this.createDataLayer();
46         this.map.addLayers([this.baseLayer, this.dataLayer]);
47
48         this.selectControl = this.createSelectControl();
49         this.map.addControl(this.selectControl);
50         this.selectControl.activate();
51
52         if (!this.map.getCenter()) {
53             var centerBounds = new OpenLayers.Bounds();
54
55             var mapProj = this.map.getProjectionObject();
56             var sypOrigProj = new OpenLayers.Projection("EPSG:4326");
57
58             var bottomLeft = new OpenLayers.LonLat(sypOrig[0],sypOrig[1]);
59             bottomLeft = bottomLeft.transform(sypOrigProj, mapProj);
60             var topRight = new OpenLayers.LonLat(sypOrig[2],sypOrig[3])
61             topRight = topRight.transform(sypOrigProj, mapProj);
62
63             centerBounds.extend(bottomLeft);
64             centerBounds.extend(topRight);
65             this.map.zoomToExtent(centerBounds);
66         }
67     },
68
69     createBaseLayer: function() {
70         return new OpenLayers.Layer.OSM("OSM");
71     },
72
73     createDataLayer: function(map) {
74         var styleMap = new OpenLayers.StyleMap (
75                         {"default": {
76                             externalGraphic: this.Settings.MARKER_ICON,
77                             graphicHeight: this.Settings.MARKER_ICON_HEIGHT
78                                             || 32 
79                                     },
80                          "select": { 
81                             externalGraphic: this.Settings.MARKER_SELECT_ICON,
82                             graphicHeight: this.Settings.MARKER_SELECT_ICON_HEIGHT 
83                                             || 32 
84                                   }
85                      });
86
87         var layer = new OpenLayers.Layer.GML("KML", "items.php", 
88            {
89             styleMap: styleMap,
90             format: OpenLayers.Format.KML, 
91             projection: this.map.displayProjection,
92             eventListeners: { scope: this,
93                               loadend: this.checkForFeatures
94                             }
95            });
96
97         return layer;
98     },
99
100     createSelectControl: function() {
101         var control = new OpenLayers.Control.SelectFeature(
102                                             this.dataLayer, {
103                                                onSelect: this.onFeatureSelect,
104                                                onUnselect: this.onFeatureUnselect,
105                                                toggle: true,
106                                                clickout: false
107                                                             });
108         return control;
109     },
110
111     checkForFeatures: function() {
112         var features = this.dataLayer.features;
113         if (features.length == 0) {
114             var message = SypStrings.noImageRegistered;
115             this.Utils.displayUserMessage(message, "warn");
116         }
117     },
118
119     createPopup: function(position, contentHTML) {
120         var popup = new OpenLayers.Popup.Anchored("popup",
121                                                   position,
122                                                   null,
123                                                   contentHTML,
124                                                   null,
125                                                   true);
126         popup.autoSize = true;
127         popup.backgroundColor = ""; // deal with it in css
128         popup.border = ""; // deal with it in css
129         popup.closeOnMove = true;
130         return popup;
131     },
132
133     onFeatureUnselect: function (feature) {
134         var map = feature.layer.map;
135         var permaControl = map.getControlsByClass("OpenLayers.Control.Permalink");
136         if (permaControl[0]) {
137             permaControl[0].div.style.display = "";
138         }
139         var popup = feature.popup;
140         if (popup.visible()) {
141             popup.hide();
142         }
143     },
144
145     onFeatureSelect: function(feature) {
146         var map = feature.layer.map;
147         var permaControl = map.getControlsByClass("OpenLayers.Control.Permalink");
148         if (permaControl[0]) {
149             permaControl[0].div.style.display = "none";
150         }
151         var popup = feature.popup;
152
153         var brCorner = SYP.Utils.brCorner(map, 8);
154
155         // we cannot reuse popup; we need to recreate it in order for IE
156         // expressions to work. Otherwise, we get a 0x0 image on second view.
157         if (popup) { 
158             popup.destroy();
159         }
160         var contentHTML;
161         if (feature.attributes.name) {
162             contentHTML = "<h2>" +
163                           feature.attributes.name + 
164                           "</h2>" + 
165                           feature.attributes.description;
166         } else {
167             contentHTML = feature.attributes.description;
168         }
169         popup = SYP.createPopup(brCorner, contentHTML);
170         var control = this;
171         popup.hide = function () {
172             OpenLayers.Element.hide(this.div);
173             control.unselect(feature);
174         };
175         map.addPopup(popup);
176         feature.popup = popup;
177     },
178
179     Utils: {
180         brCorner: function(map, margin) {
181             var bounds = map.calculateBounds();
182             var corner = new OpenLayers.LonLat(bounds.right, bounds.bottom);
183             var cornerAsPx = map.getPixelFromLonLat(corner);
184             cornerAsPx = cornerAsPx.add( -margin, -margin);
185             corner = map.getLonLatFromPixel(cornerAsPx);
186             return corner;
187         },
188         displayUserMessage: function(message, status) {
189             var div = document.getElementById('message');
190             while (div.firstChild)
191                 div.removeChild(div.firstChild);
192             var textNode = document.createTextNode(message);
193             switch (status) {
194                 case "error":
195                     div.style.color = "red";
196                     break;
197                 case "warn":
198                     div.style.color = "#FF8C00";
199                     break;
200                 case "success":
201                     div.style.color = "green";
202                     break;
203                 default:
204                     div.style.color = "black";
205                     break;
206             }
207             div.style.display = "block";
208             div.appendChild(textNode);
209         }
210     }
211 };
212
213 // if possible, determine language with HTTP_ACCEPT_LANGUAGE instead of
214 // navigator.language
215 if (OpenLayers.Lang[SypStrings.language]) {
216     OpenLayers.Lang.setCode(SypStrings.language);
217 }
218
219 // avoid alerts
220 OpenLayers.Console.userError = function(error) { 
221     SYP.Utils.displayUserMessage(error, "error");
222 }