First implementation of route management

git-svn-id: http://www.peacefrogs.net/svn/chimere/trunk@10 9215b0d5-fb2c-4bbd-8d3e-bd2e9090e864

1 files changed, 44 insertions, 12 deletions

diff --git a/static/main_map.js b/static/main_map.js
index 4a9e684..3ccf2b0 100644
--- a/static/main_map.js
+++ b/static/main_map.js
@@ -44,6 +44,7 @@ var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
 /* define global variable */
 var markers = new Array();
 var layerMarkers;
+var layerVectors;
 
 var currentPopup;
 var currentFeature;
@@ -63,8 +64,8 @@ function showPop(feature) {
     currentPopup = feature.popup;
 }
 
-/* load markers with an AJAX request */
-function loadMarkers(){
+/* load geo objects with an AJAX request */
+function loadGeoObjects(){
     /* get checked categories */
     inputs = window.document.forms["frm_categories"];
     var categories = '';
@@ -79,28 +80,36 @@ function loadMarkers(){
     }
     /* 0 stand for all categories */
     if (!categories) categories = '0';
-    var uri = "/chimere/getMarkers/" + categories;
-    OpenLayers.loadURL(uri, '', this, setMarkers);
+    var uri = "/chimere/getGeoObjects/" + categories;
+    OpenLayers.loadURL(uri, '', this, setGeoObjects);
 }
 
-/* update the marker layers from an http response GeoJSON */
-function setMarkers(response){
+/* update the marker and vector layers from an http response GeoJSON */
+function setGeoObjects(response){
     if(layerMarkers) layerMarkers.destroy();
+    if(layerVectors) layerVectors.destroy();
     if (response.responseText.indexOf('no results') == -1) {
         /* clean the marker layer */
         if (currentPopup) {
             currentPopup.hide();
             hide('detail');
         }
+        layerVectors = new OpenLayers.Layer.Vector("Vector Layer");
+        map.addLayer(layerVectors);
+        layerVectors.setOpacity(0.8);
         layerMarkers = new OpenLayers.Layer.Markers('POIs');
         map.addLayer(layerMarkers);
         layerMarkers.setOpacity(0.8);
 
         var json = new OpenLayers.Format.JSON();
-        var markers_pt = json.read(response.responseText);
-        /* load every marker */
-        for (var i = 0; i < markers_pt.features.length; i++) {
-            putMarker(markers_pt.features[i]);
+        var geo_objects = json.read(response.responseText);
+        /* load every geo object */
+        for (var i = 0; i < geo_objects.features.length; i++) {
+            var feature = geo_objects.features[i];
+            if (feature.geometry.type == 'Point') putMarker(feature);
+            if (feature.geometry.type == 'LineString') {
+                putRoute(feature);
+            }
         }
         /*
         var geojson = new OpenLayers.Format.GeoJSON();
@@ -111,9 +120,32 @@ function setMarkers(response){
     }
 }
 
+
+/* put a route on the map */
+function putRoute(route) {
+    var polyline = route.geometry;
+    var point_array = new Array();
+    for (i=0; i<polyline.coordinates.length; i++){
+        var point = new OpenLayers.Geometry.Point(polyline.coordinates[i][0],
+                                                  polyline.coordinates[i][1]);
+        point_array.push(point);
+    }
+    var linestring = new OpenLayers.Geometry.LineString(point_array);
+    currentFeature = new OpenLayers.Feature.Vector();
+
+    var style = OpenLayers.Util.extend({},
+                                OpenLayers.Feature.Vector.style['default']);
+    style.strokeColor = route.properties.color;
+    style.strokeWidth = 3;
+    currentFeature.style = style;
+    currentFeature.geometry = linestring;
+    layerVectors.addFeatures([currentFeature]);
+}
+
+
 /* put a marker on the map */
 function putMarker(mark) {
-    /* initialise a new feature with appropriate attribute for setting a
+    /* initialise a new marker with appropriate attribute for setting a
     marker */
     lat = mark.geometry.coordinates[1];
     lon = mark.geometry.coordinates[0];
@@ -199,6 +231,6 @@ function init(){
         /*projection: new OpenLayers.Projection('EPSG:900913'),
         displayProjection: new OpenLayers.Projection('EPSG:4326')*/
     map.addLayers([layerMapnik, cyclemap]);
-    loadMarkers();
+    loadGeoObjects();
     map.setCenter(centerLonLat, 12);
 }