echarts mapSymbolLayout 源码
echarts mapSymbolLayout 代码
文件路径：/src/chart/map/mapSymbolLayout.ts
/*
* 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';
import GlobalModel from '../../model/Global';
import MapSeries from './MapSeries';
import { Dictionary } from '../../util/types';
export default function mapSymbolLayout(ecModel: GlobalModel) {
const processedMapType = {} as {[mapType: string]: boolean};
ecModel.eachSeriesByType('map', function (mapSeries: MapSeries) {
const mapType = mapSeries.getMapType();
if (mapSeries.getHostGeoModel() || processedMapType[mapType]) {
return;
}
const mapSymbolOffsets = {} as Dictionary<number>;
zrUtil.each(mapSeries.seriesGroup, function (subMapSeries) {
const geo = subMapSeries.coordinateSystem;
const data = subMapSeries.originalData;
if (subMapSeries.get('showLegendSymbol') && ecModel.getComponent('legend')) {
data.each(data.mapDimension('value'), function (value, idx) {
const name = data.getName(idx);
const 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 as number)) {
return;
}
const offset = mapSymbolOffsets[name] || 0;
const point = geo.dataToPoint(region.getCenter());
mapSymbolOffsets[name] = offset + 1;
data.setItemLayout(idx, {
point: point,
offset: offset
});
});
}
});
// Show label of those region not has legendIcon (which is offset 0)
const data = mapSeries.getData();
data.each(function (idx) {
const name = data.getName(idx);
const layout = data.getItemLayout(idx) || {};
layout.showLabel = !mapSymbolOffsets[name];
data.setItemLayout(idx, layout);
});
processedMapType[mapType] = true;
});
}
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