@antv/scale
Version:
Toolkit for mapping abstract data into visual representation.
58 lines • 1.69 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.Identity = void 0;
const util_1 = require("@antv/util");
const base_1 = require("./base");
const wilkinson_extended_1 = require("../tick-methods/wilkinson-extended");
const utils_1 = require("../utils");
class Identity extends base_1.Base {
/**
* 返回需要覆盖的默认选项
* @returns 需要覆盖的默认选项
*/
getDefaultOptions() {
return {
domain: [0, 1],
range: [0, 1],
tickCount: 5,
unknown: undefined,
tickMethod: wilkinson_extended_1.wilkinsonExtended,
};
}
/**
* 输入和输出满足：y = x
* @param x 输入值
* @returns 输出值
*/
map(x) {
return (0, utils_1.isValid)(x) ? x : this.options.unknown;
}
/**
* map 的逆运算：x = y，在这里和 map 是相同方法
* @param x 输出值
* @returns 输入值
*/
invert(x) {
return this.map(x);
}
/**
* 克隆 Identity Scale
* @returns 拥有相同选项且独立的 Identity Scale
*/
clone() {
return new Identity(this.options);
}
/**
* 根据比例尺的配置去生成 ticks，该 ticks 主要用于生成坐标轴
* @returns 返回一个 ticks 的数组
*/
getTicks() {
const { domain, tickCount, tickMethod } = this.options;
const [min, max] = domain;
if (!(0, util_1.isNumber)(min) || !(0, util_1.isNumber)(max))
return [];
return tickMethod(min, max, tickCount);
}
}
exports.Identity = Identity;
//# sourceMappingURL=identity.js.map