en/builder/src/echarts3/action/geoRoam.js

import * as echarts from '../echarts';
import * as zrUtil from 'zrender/src/core/util';
import { updateCenterAndZoom } from './roamHelper';
/**
 * @payload
 * @property {string} [componentType=series]
 * @property {number} [dx]
 * @property {number} [dy]
 * @property {number} [zoom]
 * @property {number} [originX]
 * @property {number} [originY]
 */

echarts.registerAction({
  type: 'geoRoam',
  event: 'geoRoam',
  update: 'updateLayout'
}, function (payload, ecModel) {
  var componentType = payload.componentType || 'series';
  ecModel.eachComponent({
    mainType: componentType,
    query: payload
  }, function (componentModel) {
    var geo = componentModel.coordinateSystem;

    if (geo.type !== 'geo') {
      return;
    }

    var res = updateCenterAndZoom(geo, payload, componentModel.get('scaleLimit'));
    componentModel.setCenter && componentModel.setCenter(res.center);
    componentModel.setZoom && componentModel.setZoom(res.zoom); // All map series with same `map` use the same geo coordinate system
    // So the center and zoom must be in sync. Include the series not selected by legend

    if (componentType === 'series') {
      zrUtil.each(componentModel.seriesGroup, function (seriesModel) {
        seriesModel.setCenter(res.center);
        seriesModel.setZoom(res.zoom);
      });
    }
  });
});