echarts prepareCustom 源码
echarts prepareCustom 代码
文件路径：/src/coord/geo/prepareCustom.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 Geo from './Geo';
function dataToCoordSize(this: Geo, dataSize: number[], dataItem: number[]): number[] {
dataItem = dataItem || [0, 0];
return zrUtil.map([0, 1], function (dimIdx) {
const val = dataItem[dimIdx];
const halfSize = dataSize[dimIdx] / 2;
const p1 = [];
const p2 = [];
p1[dimIdx] = val - halfSize;
p2[dimIdx] = val + halfSize;
p1[1 - dimIdx] = p2[1 - dimIdx] = dataItem[1 - dimIdx];
return Math.abs(this.dataToPoint(p1)[dimIdx] - this.dataToPoint(p2)[dimIdx]);
}, this);
}
export default function geoPrepareCustom(coordSys: Geo) {
const rect = coordSys.getBoundingRect();
return {
coordSys: {
type: 'geo',
x: rect.x,
y: rect.y,
width: rect.width,
height: rect.height,
zoom: coordSys.getZoom()
},
api: {
coord: function (data: number[]): number[] {
// do not provide "out" and noRoam param,
// Compatible with this usage:
// echarts.util.map(item.points, api.coord)
return coordSys.dataToPoint(data);
},
size: zrUtil.bind(dataToCoordSize, coordSys)
}
};
}
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