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67 lines
2.1 KiB
67 lines
2.1 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.Quantize = void 0;
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const threshold_1 = require("./threshold");
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const wilkinson_extended_1 = require("../tick-methods/wilkinson-extended");
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const utils_1 = require("../utils");
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/**
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* 类似 Threshold 比例尺，区别在于 thresholds 是根据连续的 domain 根据离散的 range 的数量计算而得到的。
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*/
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class Quantize extends threshold_1.Threshold {
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getDefaultOptions() {
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return {
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domain: [0, 1],
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range: [0.5],
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nice: false,
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tickCount: 5,
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tickMethod: wilkinson_extended_1.wilkinsonExtended,
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};
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}
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constructor(options) {
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super(options);
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}
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nice() {
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const { nice } = this.options;
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if (nice) {
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const [min, max, tickCount] = this.getTickMethodOptions();
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this.options.domain = (0, utils_1.d3LinearNice)(min, max, tickCount);
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}
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}
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getTicks() {
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const { tickMethod } = this.options;
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const [min, max, tickCount] = this.getTickMethodOptions();
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return tickMethod(min, max, tickCount);
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}
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getTickMethodOptions() {
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const { domain, tickCount } = this.options;
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const min = domain[0];
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const max = domain[domain.length - 1];
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return [min, max, tickCount];
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}
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rescale() {
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this.nice();
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const { range, domain } = this.options;
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const [x0, x1] = domain;
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this.n = range.length - 1;
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this.thresholds = new Array(this.n);
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for (let i = 0; i < this.n; i += 1) {
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this.thresholds[i] = ((i + 1) * x1 - (i - this.n) * x0) / (this.n + 1);
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}
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}
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/**
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* 如果是在第一段后或者最后一段就把两端的值添加上
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*/
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invert(y) {
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const [a, b] = super.invert(y);
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const [x0, x1] = this.options.domain;
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return a === undefined && b === undefined ? [a, b] : [a || x0, b || x1];
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}
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getThresholds() {
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return this.thresholds;
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}
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clone() {
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return new Quantize(this.options);
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}
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}
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exports.Quantize = Quantize;
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//# sourceMappingURL=quantize.js.map
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