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Pie.js
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189 lines (169 loc) · 7.08 KB
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/* Copyright© 2000 - 2021 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import {ShapeFactory} from './feature/ShapeFactory';
import {Sector} from './feature/Sector';
import {Graph} from './Graph';
/**
* @class FeatureThemePie
* @aliasclass Feature.Theme.Pie
* @deprecatedclass SuperMap.Feature.Theme.Pie
* @classdesc 饼图。
* @category Visualization Theme
* @param {FeatureVector} data - 用户数据。
* @param {SuperMap.Layer.Graph} layer - 此专题要素所在图层。
* @param {Array.<string>} fields - data 中的参与此图表生成的字段名称。
* @param {FeatureThemePoint.setting} setting - 图表配置对象。
* @param {LonLat} [lonlat] - 专题要素地理位置。默认为 data 指代的地理要素 Bounds 中心。
* @extends FeatureThemeGraph
* @example
* // sectorStyleByCodomain 的每个元素是个包含值域信息和与值域对应样式信息的对象，该对象（必须）有三个属性：
* // start: 值域值下限（包含）;
* // end: 值域值上限（不包含）;
* // style: 数据可视化图形的 style，这个样式对象的可设属性： <ShapeParametersSector.style> 。
* // sectorStyleByCodomain 数组形如：
* [
* {
* start:0,
* end:250,
* style:{
* fillColor:"#00CD00"
* }
* },
* {
* start:250,
* end:500,
* style:{
* fillColor:"#00EE00"
* }
* },
* {
* start:500,
* end:750,
* style:{
* fillColor:"#00FF7F"
* }
* },
* {
* start:750,
* end:1500,
* style:{
* fillColor:"#00FF00"
* }
* }
* ]
* @usage
* @private
*/
export class Pie extends Graph {
constructor(data, layer, fields, setting, lonlat) {
super(data, layer, fields, setting, lonlat);
this.CLASS_NAME = "SuperMap.Feature.Theme.Pie";
}
/**
* @function FeatureThemePie.prototype.destroy
* @description 销毁此专题要素。调用 destroy 后此对象所以属性置为 null。
*/
destroy() {
super.destroy();
}
/**
* @function FeatureThemePie.prototype.assembleShapes
* @description 装配图形（扩展接口）。
*/
assembleShapes() {
// 图表配置对象
var sets = this.setting;
// 一个默认 style 组
var defaultStyleGroup = [
{fillColor: "#ff9277"}, {fillColor: "#dddd00"}, {fillColor: "#ffc877"}, {fillColor: "#bbe3ff"}, {fillColor: "#d5ffbb"},
{fillColor: "#bbbbff"}, {fillColor: "#ddb000"}, {fillColor: "#b0dd00"}, {fillColor: "#e2bbff"}, {fillColor: "#ffbbe3"},
{fillColor: "#ff7777"}, {fillColor: "#ff9900"}, {fillColor: "#83dd00"}, {fillColor: "#77e3ff"}, {fillColor: "#778fff"},
{fillColor: "#c877ff"}, {fillColor: "#ff77ab"}, {fillColor: "#ff6600"}, {fillColor: "#aa8800"}, {fillColor: "#77c7ff"},
{fillColor: "#ad77ff"}, {fillColor: "#ff77ff"}, {fillColor: "#dd0083"}, {fillColor: "#777700"}, {fillColor: "#00aa00"},
{fillColor: "#0088aa"}, {fillColor: "#8400dd"}, {fillColor: "#aa0088"}, {fillColor: "#dd0000"}, {fillColor: "#772e00"}
];
// 重要步骤：初始化参数
if (!this.initBaseParameter()) {
return;
}
// 背景框，默认不启用
if (sets.useBackground) {
this.shapes.push(ShapeFactory.Background(this.shapeFactory, this.chartBox, sets));
}
// 数据值数组
var fv = this.dataValues;
if (fv.length < 1) {
return;
} // 没有数据
// 值域范围
var codomain = this.DVBCodomain;
// 值域范围检测
for (let i = 0; i < fv.length; i++) {
if (fv[i] < codomain[0] || fv[i] > codomain[1]) {
return;
}
}
// 值的绝对值总和
var valueSum = 0;
for (let i = 0; i < fv.length; i++) {
valueSum += Math.abs(fv[i]);
}
// 重要步骤：定义图表 FeatureThemePie 数据视图框中单位值的含义，单位值：每度代表的数值
this.DVBUnitValue = 360 / valueSum;
var uv = this.DVBUnitValue;
var dvbCenter = this.DVBCenterPoint; // 数据视图框中心作为扇心
var startAngle = 0; // 扇形起始边角度
var endAngle = 0; // 扇形终止边角度
var startAngleTmp = startAngle; // 扇形临时起始边角度
// 扇形（自适应）半径
var r = this.DVBHeight < this.DVBWidth ? this.DVBHeight / 2 : this.DVBWidth / 2;
for (var i = 0; i < fv.length; i++) {
var fvi = Math.abs(fv[i]);
//计算终止角
if (i === 0) {
endAngle = startAngle + fvi * uv;
} else if (i === fvi.length - 1) {
endAngle = startAngleTmp;
} else {
endAngle = startAngle + fvi * uv;
}
//矫正误差计算
if ((endAngle - startAngle) >= 360) {
endAngle = 359.9999999;
}
// 扇形参数对象
var sectorSP = new Sector(dvbCenter[0], dvbCenter[1], r, startAngle, endAngle);
// 扇形样式
if (typeof(sets.sectorStyleByFields) === "undefined") {
// 使用默认 style 组
var colorIndex = i % defaultStyleGroup.length;
sectorSP.style = ShapeFactory.ShapeStyleTool(null, sets.sectorStyle, defaultStyleGroup, null, colorIndex);
} else {
sectorSP.style = ShapeFactory.ShapeStyleTool(null, sets.sectorStyle, sets.sectorStyleByFields, sets.sectorStyleByCodomain, i, fv[i]);
}
// 扇形 hover 样式
sectorSP.highlightStyle = ShapeFactory.ShapeStyleTool(null, sets.sectorHoverStyle);
// 扇形 hover 与 click 设置
if (typeof(sets.sectorHoverAble) !== "undefined") {
sectorSP.hoverable = sets.sectorHoverAble;
}
if (typeof(sets.sectorClickAble) !== "undefined") {
sectorSP.clickable = sets.sectorClickAble;
}
// 图形携带的数据信息
sectorSP.refDataID = this.data.id;
sectorSP.dataInfo = {
field: this.fields[i],
value: fv[i]
};
// 创建扇形并把此扇形添加到图表图形数组
this.shapes.push(this.shapeFactory.createShape(sectorSP));
// 把上一次的结束角度作为下一次的起始角度
startAngle = endAngle;
}
// 重要步骤：将图形转为由相对坐标表示的图形，以便在地图平移缩放过程中快速重绘图形
// （统计专题图模块从结构上要求使用相对坐标，assembleShapes() 函数必须在图形装配完成后调用 shapesConvertToRelativeCoordinate() 函数）
this.shapesConvertToRelativeCoordinate();
}
}