Initial commit

2020-06-15 10:58:47 +08:00
commit 4f1dfe7564
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+var _ = require('underscore');
+var legendsMetadata = require('builder/data/legends/legends-metadata');
+
+var legends;
+
+var LEGENDS_METADATA = _.keys(legendsMetadata);
+var LEGENDS_COLOR = ['category', 'choropleth'];
+
+var LegendManager = {
+  trackLegends: function (layers) {
+    legends = {};
+
+    _.each(layers.models, function (layerModel) {
+      var legendsLayer;
+      var options = {};
+      if (layerModel.legends != null) {
+        legendsLayer = layerModel.legends;
+        _.each(LEGENDS_METADATA, function (legend) {
+          var legendModel = legendsLayer[legend];
+          if (legendModel.get('visible') === true) {
+            options[legend] = legendModel;
+          }
+        });
+        legends[layerModel.id] = options;
+      }
+    });
+  },
+
+  getLegends: function () {
+    return legends;
+  },
+
+  updateLegends: function (layerId) {
+    var legendsLayer = legends[layerId];
+    _.each(LEGENDS_COLOR, function (legend) {
+      var legendModel = legendsLayer[legend];
+      legendModel && legendModel.set({visible: false});
+    });
+  },
+
+  resetLegends: function (layerId) {
+    var legendsLayer = legends[layerId];
+    _.each(legendsLayer, function (legend) {
+      legend.set({visible: true});
+    });
+  }
+};
+
+module.exports = LegendManager;