echarts prepareCustom 源码
echarts prepareCustom 代码
文件路径：/src/coord/cartesian/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 Cartesian2D from './Cartesian2D';
function dataToCoordSize(this: Cartesian2D, dataSize: number[], dataItem: number[]): number[] {
// dataItem is necessary in log axis.
dataItem = dataItem || [0, 0];
return zrUtil.map(['x', 'y'], function (dim, dimIdx) {
const axis = this.getAxis(dim);
const val = dataItem[dimIdx];
const halfSize = dataSize[dimIdx] / 2;
return axis.type === 'category'
? axis.getBandWidth()
: Math.abs(axis.dataToCoord(val - halfSize) - axis.dataToCoord(val + halfSize));
}, this);
}
export default function cartesianPrepareCustom(coordSys: Cartesian2D) {
const rect = coordSys.master.getRect();
return {
coordSys: {
// The name exposed to user is always 'cartesian2d' but not 'grid'.
type: 'cartesian2d',
x: rect.x,
y: rect.y,
width: rect.width,
height: rect.height
},
api: {
coord: function (data: number[]) {
// do not provide "out" param
return coordSys.dataToPoint(data);
},
size: zrUtil.bind(dataToCoordSize, coordSys)
}
};
}
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