multi user administration

[syp.git] / js / syp.js

diff --git a/js/syp.js b/js/syp.js
index 2c87c2b34bb83b64ae8fe784d9558f2343d519d8..40735c791cbb516ea273c0fe40a0e85d58ecb28b 100644 (file)
--- a/js/syp.js
+++ b/js/syp.js
@@ -17,10 +17,10 @@ OpenLayers.Control.SypAttribution = OpenLayers.Class (OpenLayers.Control.Attribu
 });
 
 var SYP = {
-    Settings: {
-        MARKER_ICON: "media/marker-normal.png",
-        MARKER_SELECT_ICON: "media/marker-selected.png",
-        MARKER_HEIGHT: 25
+    Markers: {
+        ICON: "media/marker-normal.png",
+        SELECT_ICON: "media/marker-selected.png",
+        HEIGHT: 25
     },
 
     map: null,
@@ -49,19 +49,7 @@ var SYP = {
         this.selectControl.activate();
 
         if (!this.map.getCenter()) {
-            var centerBounds = new OpenLayers.Bounds();
-
-            var mapProj = this.map.getProjectionObject();
-            var sypOrigProj = new OpenLayers.Projection("EPSG:4326");
-
-            var bottomLeft = new OpenLayers.LonLat(sypOrig[0],sypOrig[1]);
-            bottomLeft = bottomLeft.transform(sypOrigProj, mapProj);
-            var topRight = new OpenLayers.LonLat(sypOrig[2],sypOrig[3])
-            topRight = topRight.transform(sypOrigProj, mapProj);
-
-            centerBounds.extend(bottomLeft);
-            centerBounds.extend(topRight);
-            this.map.zoomToExtent(centerBounds);
+            this.map.setCenter(new OpenLayers.LonLat(0, 0), 0);
         }
     },
 
@@ -71,20 +59,20 @@ var SYP = {
 
     createDataLayer: function(map) {
         var defaultStyle = new OpenLayers.Style({
-            externalGraphic: this.Settings.MARKER_ICON,
+            externalGraphic: this.Markers.ICON,
             graphicHeight: "${height}"
         }, {
             context: {
                 height: function(feature) {
-                    var defaultHeight = SYP.Settings.MARKER_HEIGHT || 32;
+                    var defaultHeight = SYP.Markers.HEIGHT || 32;
                     var increase = 4 * (feature.attributes.count - 1);
                     return Math.min(defaultHeight + increase, 50);
                 }
             }
         });
         var selectStyle = new OpenLayers.Style({
-            externalGraphic: this.Settings.MARKER_SELECT_ICON,
-            graphicHeight: this.Settings.MARKER_HEIGHT || 32 
+            externalGraphic: this.Markers.SELECT_ICON,
+            graphicHeight: this.Markers.HEIGHT || 32 
         });
         var styleMap = new OpenLayers.StyleMap (
                         {"default": defaultStyle,
@@ -99,7 +87,7 @@ var SYP = {
             format: OpenLayers.Format.KML, 
             projection: this.map.displayProjection,
             eventListeners: { scope: this,
-                              loadend: this.checkForFeatures
+                              loadend: this.dataLayerEndLoad
                             }
            });
 
@@ -117,12 +105,38 @@ var SYP = {
         return control;
     },
 
+    dataLayerEndLoad: function() {
+        if (!this.checkForFeatures()) {
+            return;
+        }
+
+        var map = this.map;
+        if (map.getControlsByClass("OpenLayers.Control.ArgParser")[0].lat
+            == undefined) { // map center was not set in ArgParser control.
+            var orig = this.Utils.mbr (this.dataLayer);
+            var centerBounds = new OpenLayers.Bounds();
+
+            var mapProj = map.getProjectionObject();
+            var sypOrigProj = new OpenLayers.Projection("EPSG:4326");
+
+            var bottomLeft = new OpenLayers.LonLat(orig[0],orig[1]);
+            bottomLeft = bottomLeft.transform(sypOrigProj, mapProj);
+            var topRight = new OpenLayers.LonLat(orig[2],orig[3])
+            topRight = topRight.transform(sypOrigProj, mapProj);
+
+            centerBounds.extend(bottomLeft);
+            centerBounds.extend(topRight);
+            map.zoomToExtent(centerBounds);
+        }
+    },
+
     checkForFeatures: function() {
         var features = this.dataLayer.features;
         if (features.length == 0) {
             var message = SypStrings.noImageRegistered;
             this.Utils.displayUserMessage(message, "warn");
         }
+        return !!features.length;
     },
 
     createPopup: function(position, contentHTML) {
@@ -170,7 +184,7 @@ var SYP = {
         var popup = feature.popup;
 
         var popupPos = null;
-        if (sypPopupNearFeature) {
+        if (sypSettings.popupNearfeature) {
             popupPos = feature.geometry.getBounds().getCenterLonLat();
         } else {
             popupPos = SYP.Utils.brCorner(map, 8);
@@ -257,6 +271,59 @@ var SYP = {
             corner = map.getLonLatFromPixel(cornerAsPx);
             return corner;
         },
+
+        /* minimum bounds rectangle containing all feature locations.
+         * FIXME: if two features are close, but separated by 180th meridian,
+         * their mbr will span the whole earth. Actually, 179° lon and -170°
+         * lon are considerated very near.
+         */
+        mbr: function (layer) {
+            var features = [];
+            var map = layer.map;
+
+            var mapProj = map.getProjectionObject();
+            var sypOrigProj = new OpenLayers.Projection("EPSG:4326");
+
+            for (var i =0; i < layer.features.length; i++) {
+                if (layer.features[i].cluster) {
+                    features = features.concat(layer.features[i].cluster);
+                } else {
+                    features = features.concat(layer.features);
+                }
+            }
+
+            var minlon = 180;
+            var minlat = 88;
+            var maxlon = -180;
+            var maxlat = -88;
+
+            if (features.length == 0) {
+                // keep default values
+            } else if (features.length == 1) {
+                // in case there's only one feature, we show an area of at least 
+                // 4 x 4 degrees
+                var pos = features[0].geometry.getBounds().getCenterLonLat().clone();
+                var lonlat = pos.transform(mapProj, sypOrigProj);
+
+                minlon = Math.max (lonlat.lon - 2, -180);
+                maxlon = Math.min (lonlat.lon + 2, 180);
+                minlat = Math.max (lonlat.lat - 2, -90);
+                maxlat = Math.min (lonlat.lat + 2, 90);
+            } else {
+                for (var i = 0; i < features.length; i++) {
+                    var pos = features[i].geometry.getBounds().getCenterLonLat().clone();
+                    var lonlat = pos.transform(mapProj, sypOrigProj);
+                    minlon = Math.min (lonlat.lon, minlon);
+                    minlat = Math.min (lonlat.lat, minlat);
+                    maxlon = Math.max (lonlat.lon, maxlon);
+                    maxlat = Math.max (lonlat.lat, maxlat);
+                }
+            }
+
+            return [minlon, minlat, maxlon, maxlat];
+
+        },
+
         displayUserMessage: function(message, status) {
             var div = document.getElementById('message');
             while (div.firstChild)