Disable overlay layers at minZoom and add tooltips

[rails.git] / app / assets / javascripts / leaflet.layers.js

diff --git a/app/assets/javascripts/leaflet.layers.js b/app/assets/javascripts/leaflet.layers.js
index fd493ee32c212d882b38bd6948ef07861c26cd55..2d28c256cac10042927dfcdcb6f6c889bfd86ad5 100644 (file)
--- a/app/assets/javascripts/leaflet.layers.js
+++ b/app/assets/javascripts/leaflet.layers.js
@@ -120,8 +120,13 @@ L.OSM.layers = function(options) {
       var list = $('<ul>')
         .appendTo(overlaySection);
 
-      function addOverlay(layer, name) {
+      function addOverlay(layer, name, minZoom) {
+        var refName = name.split(' ').join('_').toLowerCase();
         var item = $('<li>')
+          .attr('class', refName)
+          .tooltip({
+            placement: 'top'
+          })
           .appendTo(list);
 
         var label = $('<label>')
@@ -140,15 +145,24 @@ L.OSM.layers = function(options) {
           } else {
             map.removeLayer(layer);
           }
+          map.fire('overlaylayerchange', {layer: layer});
         });
 
         map.on('layeradd layerremove', function() {
           input.prop('checked', map.hasLayer(layer));
         });
+
+        map.on('zoomend', function() {
+          var disabled = map.getZoom() < minZoom + 1;
+          $(input).prop('disabled', disabled);
+          disabled ? $(item).attr('class', 'disabled') : $(item).attr('class', '');
+          item.attr('data-original-title', disabled ?
+            'Zoom in to see ' + name.toLowerCase() : '');
+        });
       }
 
-      addOverlay(map.noteLayer, I18n.t('javascripts.map.layers.notes'));
-      addOverlay(map.dataLayer, I18n.t('javascripts.map.layers.data'));
+      addOverlay(map.noteLayer, I18n.t('javascripts.map.layers.notes'), 10);
+      addOverlay(map.dataLayer, I18n.t('javascripts.map.layers.data'), 15);
     }
 
     options.sidebar.addPane($ui);