Map JS: display popup - manage click on cluster - hover

2 files changed, 222 insertions, 16 deletions

diff --git a/ishtar_common/static/js/ishtar-map.js b/ishtar_common/static/js/ishtar-map.js
index 3cce09fcb..1d84adb49 100644
--- a/ishtar_common/static/js/ishtar-map.js
+++ b/ishtar_common/static/js/ishtar-map.js
@@ -1,13 +1,16 @@
-/* layers */
-
+/* default variables */
 
 var default_pointer = "/media/images/default-pointer.png";
 var marker_cluster = "/media/images/marker-cluster.png";
 
 var view_projection = 'EPSG:3857';
+var animation_duration = 250;
 
 var map_default_center = 'SRID=4326;POINT (2.4397 46.5528)';
 var map_default_zoom = '7';
+var min_auto_zoom_on_cluster = 13;
+
+/* base layers */
 
 var source_osm = function(options){
     return new ol.layer.Tile({
@@ -15,7 +18,6 @@ var source_osm = function(options){
     });
 };
 
-
 var default_map_layers = {
     'osm': source_osm
 };
@@ -83,10 +85,11 @@ var enable_clustering = function(){
 
     function cluster_get_style (feature, resolution){
         feature.set('key', 'cluster');
-        var features = feature.get('features');
+        var cluster_features = feature.get('features');
 
-        var size = features.length;
+        var size = cluster_features.length;
         feature.set('size', size);
+
         var style = _styleCache[size];
 
         // no cluster for lonely marker
@@ -100,7 +103,7 @@ var enable_clustering = function(){
                         radius: radius,
                         stroke: new ol.style.Stroke({
                             color:"rgba("+color+",0.5)",
-                            width:15
+                            width: 15
                         }),
                         fill: new ol.style.Fill({
                             color:"rgba("+color+",1)"
@@ -122,8 +125,8 @@ var enable_clustering = function(){
         }
         if (size > 1){
             // marker himself disappear
-            for (idx in features){
-                var feat = features[idx];
+            for (idx in cluster_features){
+                var feat = cluster_features[idx];
                 if (!_remindUpdated[feat.getProperties()['id']]){
                     if (!_remindOldStyle[feat.getProperties()['id']]){
                         _remindOldStyle[feat.getProperties()['id']] = feat.getStyle();
@@ -134,7 +137,7 @@ var enable_clustering = function(){
             }
         } else {
             // or re-appear
-            var feat = features[0];
+            var feat = cluster_features[0];
             if (!_remindUpdated[feat.getProperties()['id']] &&
                   _remindOldStyle[feat.getProperties()['id']]){
                 feat.setStyle(_remindOldStyle[feat.getProperties()['id']]);
@@ -167,6 +170,200 @@ var reinit_clustering = function(){
     _currentRemind = -1;
 };
 
+/* manage clicks */
+
+var current_feature;
+var animate_in_progress = false;
+
+var animate_end = function(){animate_in_progress = false};
+
+var wait_animation_end = function(callback, retry){
+    if (!retry) retry = 1;
+    setTimeout(function(){
+        retry += 1
+        if (retry < 5 && animate_in_progress){
+            wait_animation_end(callback)
+        } else {
+            callback();
+        }
+    }, 100);
+};
+
+var manage_click_on_map = function(e) {
+    var feature = map.forEachFeatureAtPixel(
+        e.pixel,
+        function(feature, layer) {
+            return feature;
+        }
+    );
+    click_on_feature(feature);
+};
+
+var click_on_feature = function(feature){
+
+    if (typeof feature == 'undefined'){
+        current_feature = null;
+        return;
+    }
+    if (current_feature == feature){
+        return
+    }
+    current_feature = feature;
+    if (!feature) return;
+    $(popup_item).hide();
+
+    var timeout = 200;
+    setTimeout(function(){
+        // zoom on aggregated
+        var key = feature.get('key');
+        if (key && key.length > 6 && key.substring(0, 7) == 'cluster'){
+            feature = click_on_cluster(feature);
+        } else {
+            feature = click_on_pointer(feature);
+        }
+    }, timeout);
+};
+
+var click_on_cluster = function(feature, zoom_level, duration, nb_zoom,
+                                current_nb_items){
+    if (!duration){
+        // zoom animation must be slower
+        duration = animation_duration * 2;
+    }
+    if (!nb_zoom) nb_zoom = 0;
+
+    var props = feature.getProperties();
+    if (!'features' in props) return feature;
+    if (!current_nb_items){
+        current_nb_items = props['features'].length;
+    } else if(current_nb_items != props['features'].length) {
+        // stop zooming there less item in the cluster
+        return feature;
+    }
+
+    var v = map.getView();
+    if (!zoom_level) zoom_level = v.getZoom() + 1;
+
+    // center
+    var new_center = feature.getGeometry().getCoordinates()
+    // max zoom reached
+    if (zoom_level >= min_auto_zoom_on_cluster){
+        animate_in_progress = true;
+        v.animate({center: new_center, duration: duration}, animate_end);
+        return display_cluster_detail(feature);
+    }
+
+    // zoom
+    animate_in_progress = true;
+    v.animate({center: new_center, zoom: zoom_level, duration: duration},
+              animate_end);
+
+    nb_zoom += 1;
+    // something wrong stop zoom!
+    if (nb_zoom > v.getMaxZoom()) return feature;
+
+    // wait for the animation to finish before rezoom
+    return setTimeout(
+        function(){
+            // our cluster must be at the center (if it exists after zoom)
+            var pixel = map.getPixelFromCoordinate(v.getCenter());
+            var new_feature;
+            map.forEachFeatureAtPixel(
+                pixel, function(feat, layer){
+                    if (layer == cluster_layer){
+                        new_feature = feat;
+                        return true
+                    }
+                }
+            );
+            if (new_feature){
+                if (zoom_level < min_auto_zoom_on_cluster){
+                    return display_cluster_detail(
+                        new_feature, zoom_level + 1, duration, nb_zoom,
+                        current_nb_items);
+                }
+                return click_on_cluster(
+                    new_feature, zoom_level + 1, duration, nb_zoom,
+                    current_nb_items);
+            }
+            // no more cluster feature here or min auto zoom reach: stop zooming
+            return feature;
+        }, duration + 200);
+};
+
+var click_on_pointer = function(feature){
+    console.log("click_on_pointer");
+    var features = new Array();
+    features.push(feature)
+    display_items(features, -14, -54);
+};
+
+/* display info */
+
+var display_cluster_detail = function(cluster){
+    console.log("display_cluster_detail");
+    display_items(cluster.getProperties()['features'], -14, -21);
+};
+
+var display_items = function(features, offset_x, offset_y){
+    wait_animation_end(function() {_display_items(features, offset_x, offset_y)});
+};
+
+var _display_items = function(features, offset_x, offset_y){
+    console.log("display_items");
+    var feature = features[0];
+    var geom = feature.getGeometry();
+    var popup_content = "<ul>";
+    features.forEach(function(feat){
+        var properties = feat.getProperties();
+        popup_content += "<li>" + properties['link'] + " " + properties['name'] + "</li>"
+        console.log(properties);
+    });
+    popup_content += "</ul>";
+    $(popup_item).html(popup_content);
+    popup.setPosition([0, 0]);  // out of the map
+    $(popup_item).show(function(){
+
+        offset_x -= $(popup_item).width() / 2;
+        console.log(offset_x);
+        popup.setOffset([offset_x, offset_y]);
+        popup.setPosition(geom.getCoordinates());
+    });
+};
+
+/* hover */
+
+var manage_hover = function(e) {
+    var pixel = map.getEventPixel(e.originalEvent);
+    var feature = map.forEachFeatureAtPixel(
+        e.pixel,
+        function(feature, layer) {
+            return feature;
+        }
+    );
+    var hit = map.hasFeatureAtPixel(pixel);
+    var target = map.getTarget();
+    target = typeof target === "string" ?
+        document.getElementById(target) : target;
+    target.style.cursor = hit ? 'pointer' : '';
+};
+
+/* popup */
+
+var popup;
+var popup_item;
+
+var init_popup = function(){
+    popup_item = document.getElementById("ishtar-map-popup-" + map_id);
+    var popup_options = {
+        element: popup_item,
+        positioning: 'bottom-left',
+        stopEvent: false
+    }
+    popup = new ol.Overlay(popup_options);
+    map.addOverlay(popup);
+};
+
 
 /* display map */
 var vector_source;
@@ -174,6 +371,7 @@ var vector_layer;
 var center;
 var point_features;
 var map;
+var map_id;
 var map_view;
 var map_layers;
 var proj_options = {
@@ -182,7 +380,7 @@ var proj_options = {
 var geojson_format = new ol.format.GeoJSON(proj_options);
 var wkt_format = new ol.format.WKT(proj_options);
 
-var initialize_map = function(map_id, layers){
+var initialize_map = function(layers){
     center = wkt_format.readGeometry(map_default_center).getCoordinates();
 
     /*
@@ -213,18 +411,21 @@ var initialize_map = function(map_id, layers){
 
 }
 
-var redraw_map = function(map_id, layers){
+var redraw_map = function(layers){
     map.setTarget(null);
     map = null;
-    initialize_map(map_id, layers);
+    initialize_map(layers);
+    reinit_clustering();
+    current_feature = null;
 };
 
 
-var display_map = function(map_id, points, layers){
+var display_map = function(current_map_id, points, layers){
+    map_id = current_map_id;
     if (map){
-        redraw_map(map_id, layers);
+        redraw_map(layers);
     } else {
-        initialize_map(map_id, layers);
+        initialize_map(layers);
     }
     point_features = geojson_format.readFeatures(points);
     vector_source.clear();
@@ -240,5 +441,9 @@ var display_map = function(map_id, points, layers){
 
     enable_clustering();
     cluster_source.getSource().addFeatures(point_features);
-}
 
+    init_popup();
+
+    map.on('click', manage_click_on_map);
+    map.on('pointermove', manage_hover);
+}
diff --git a/ishtar_common/static/js/ishtar.js b/ishtar_common/static/js/ishtar.js
index 96f1a4cc9..929629397 100644
--- a/ishtar_common/static/js/ishtar.js
+++ b/ishtar_common/static/js/ishtar.js
@@ -1241,6 +1241,7 @@ var render_map = function(data_table, table_name, nb_select, map_id){
     //var html = render_paginate_select(table_name, 'map', nb_select);
     var html = "";
     html += "<div class='ishtar-table-map' id='" + map_id + "'></div>";
+    html += "<div class='ishtar-map-popup' id='ishtar-map-popup-" + map_id + "'></div>";
     return {"points": data_table, "html": html};
 };