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node_modules/echarts/src/chart/map/mapSymbolLayout.js 2.68 KB
aaac7fed   liuqimichale   add
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  /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */
  
  import * as zrUtil from 'zrender/src/core/util';
  
  export default function (ecModel) {
  
      var processedMapType = {};
  
      ecModel.eachSeriesByType('map', function (mapSeries) {
          var mapType = mapSeries.getMapType();
          if (mapSeries.getHostGeoModel() || processedMapType[mapType]) {
              return;
          }
  
          var mapSymbolOffsets = {};
  
          zrUtil.each(mapSeries.seriesGroup, function (subMapSeries) {
              var geo = subMapSeries.coordinateSystem;
              var data = subMapSeries.originalData;
              if (subMapSeries.get('showLegendSymbol') && ecModel.getComponent('legend')) {
                  data.each(data.mapDimension('value'), function (value, idx) {
                      var name = data.getName(idx);
                      var region = geo.getRegion(name);
  
                      // If input series.data is [11, 22, '-'/null/undefined, 44],
                      // it will be filled with NaN: [11, 22, NaN, 44] and NaN will
                      // not be drawn. So here must validate if value is NaN.
                      if (!region || isNaN(value)) {
                          return;
                      }
  
                      var offset = mapSymbolOffsets[name] || 0;
  
                      var point = geo.dataToPoint(region.center);
  
                      mapSymbolOffsets[name] = offset + 1;
  
                      data.setItemLayout(idx, {
                          point: point,
                          offset: offset
                      });
                  });
              }
          });
  
          // Show label of those region not has legendSymbol(which is offset 0)
          var data = mapSeries.getData();
          data.each(function (idx) {
              var name = data.getName(idx);
              var layout = data.getItemLayout(idx) || {};
              layout.showLabel = !mapSymbolOffsets[name];
              data.setItemLayout(idx, layout);
          });
  
          processedMapType[mapType] = true;
      });
  }