mirror of https://gitee.com/antv-l7/antv-l7
237 lines
7.6 KiB
JavaScript
237 lines
7.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports["default"] = void 0;
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var _linear = _interopRequireDefault(require("./linear"));
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var _util = _interopRequireDefault(require("../util"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
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function _typeof(obj) { if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
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function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
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function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } return _assertThisInitialized(self); }
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function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
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function _get(target, property, receiver) { if (typeof Reflect !== "undefined" && Reflect.get) { _get = Reflect.get; } else { _get = function _get(target, property, receiver) { var base = _superPropBase(target, property); if (!base) return; var desc = Object.getOwnPropertyDescriptor(base, property); if (desc.get) { return desc.get.call(receiver); } return desc.value; }; } return _get(target, property, receiver || target); }
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function _superPropBase(object, property) { while (!Object.prototype.hasOwnProperty.call(object, property)) { object = _getPrototypeOf(object); if (object === null) break; } return object; }
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function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); if (superClass) _setPrototypeOf(subClass, superClass); }
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function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
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// 计算log
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function log(a, b) {
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if (a === 1) {
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return 1;
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}
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return Math.log(b) / Math.log(a);
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}
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/**
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* 度量的log计算
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* @class Scale.Log
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*/
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var Log =
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/*#__PURE__*/
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function (_Linear) {
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_inherits(Log, _Linear);
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function Log() {
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_classCallCheck(this, Log);
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return _possibleConstructorReturn(this, _getPrototypeOf(Log).apply(this, arguments));
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}
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_createClass(Log, [{
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key: "getDefaultCfg",
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/**
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* @override
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*/
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value: function getDefaultCfg() {
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var cfg = _get(_getPrototypeOf(Log.prototype), "getDefaultCfg", this).call(this);
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return _util["default"].mix({}, cfg, {
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/**
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* @override
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*/
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type: 'log',
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/**
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* 进行log计算的基数
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* @type {Number}
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*/
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base: 2,
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/**
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* @override
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* log 的坐标点的个数控制在10个以下
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* @type {Number}
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*/
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tickCount: 10,
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// 最小的tick，仅内部使用
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_minTick: null
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});
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}
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/**
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* @override
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*/
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}, {
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key: "calculateTicks",
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value: function calculateTicks() {
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var self = this;
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var base = self.base;
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var minTick;
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if (self.min < 0) {
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throw new Error('The minimum value must be greater than zero!');
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}
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var maxTick = log(base, self.max);
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if (self.min > 0) {
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minTick = Math.floor(log(base, self.min));
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} else {
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var values = self.values;
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var positiveMin = self.max; // 查找大于0的第一个值, 如果都小于0，默认为1
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_util["default"].each(values, function (value) {
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if (value > 0 && value < positiveMin) {
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positiveMin = value;
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}
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});
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if (positiveMin === self.max) {
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positiveMin = self.max / base;
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}
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if (positiveMin > 1) {
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positiveMin = 1;
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}
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minTick = Math.floor(log(base, positiveMin));
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self._minTick = minTick;
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self.positiveMin = positiveMin;
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}
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var count = maxTick - minTick;
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var tickCount = self.tickCount;
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var avg = Math.ceil(count / tickCount);
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var ticks = [];
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for (var i = minTick; i < maxTick + avg; i = i + avg) {
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ticks.push(Math.pow(base, i));
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}
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/**/
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if (self.min === 0) {
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ticks.unshift(0);
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}
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return ticks;
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} // 获取度量计算时，value占的定义域百分比
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}, {
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key: "_getScalePercent",
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value: function _getScalePercent(value) {
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var max = this.max;
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var min = this.min;
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if (max === min) {
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return 0;
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} // 如果值小于等于0，则按照0处理
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if (value <= 0) {
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return 0;
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}
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var base = this.base;
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var positiveMin = this.positiveMin; // 如果min == 0, 则根据比0大的最小值，计算比例关系。这个最小值作为坐标轴上的第二个tick，第一个是0但是不显示
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if (positiveMin) {
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min = positiveMin * 1 / base;
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}
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var percent; // 如果数值小于次小值，那么就计算 value / 次小值 占整体的比例
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if (value < positiveMin) {
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percent = value / positiveMin / (log(base, max) - log(base, min));
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} else {
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percent = (log(base, value) - log(base, min)) / (log(base, max) - log(base, min));
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}
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return percent;
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}
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/**
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* @override
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*/
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}, {
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key: "scale",
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value: function scale(value) {
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var percent = this._getScalePercent(value);
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var rangeMin = this.rangeMin();
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var rangeMax = this.rangeMax();
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return rangeMin + percent * (rangeMax - rangeMin);
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}
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/**
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* @override
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*/
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}, {
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key: "invert",
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value: function invert(value) {
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var base = this.base;
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var max = log(base, this.max);
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var rangeMin = this.rangeMin();
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var range = this.rangeMax() - rangeMin;
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var min;
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var positiveMin = this.positiveMin;
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if (positiveMin) {
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if (value === 0) {
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return 0;
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}
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min = log(base, positiveMin / base);
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var appendPercent = 1 / (max - min) * range; // 0 到 positiveMin的占比
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if (value < appendPercent) {
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// 落到 0 - positiveMin 之间
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return value / appendPercent * positiveMin;
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}
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} else {
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min = log(base, this.min);
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}
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var percent = (value - rangeMin) / range;
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var tmp = percent * (max - min) + min;
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return Math.pow(base, tmp);
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}
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}]);
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return Log;
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}(_linear["default"]);
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var _default = Log;
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exports["default"] = _default; |