@antv/f2/es/deps/f2-scale/src/continuous/base.js

Charts for mobile visualization.

import { __extends } from "tslib";
import { filter, getRange, head, isNil, last } from '@antv/util';
import Base from '../base';
/**
 * 连续度量的基类
 * @class
 */
var Continuous = /** @class */function (_super) {
  __extends(Continuous, _super);
  function Continuous() {
    var _this = _super !== null && _super.apply(this, arguments) || this;
    _this.isContinuous = true;
    return _this;
  }
  Continuous.prototype.scale = function (value) {
    if (isNil(value)) {
      return NaN;
    }
    var rangeMin = this.rangeMin();
    var rangeMax = this.rangeMax();
    var max = this.max;
    var min = this.min;
    if (max === min) {
      return rangeMin;
    }
    var percent = this.getScalePercent(value);
    return rangeMin + percent * (rangeMax - rangeMin);
  };
  Continuous.prototype.init = function () {
    _super.prototype.init.call(this);
    // init 完成后保证 min, max 包含 ticks 的范围
    var ticks = this.ticks;
    var firstTick = head(ticks);
    var lastTick = last(ticks);
    if (firstTick < this.min) {
      this.min = firstTick;
    }
    if (lastTick > this.max) {
      this.max = lastTick;
    }
    // strict-limit 方式
    if (!isNil(this.minLimit)) {
      this.min = firstTick;
    }
    if (!isNil(this.maxLimit)) {
      this.max = lastTick;
    }
  };
  Continuous.prototype.setDomain = function () {
    var _a = getRange(this.values),
      min = _a.min,
      max = _a.max;
    if (isNil(this.min)) {
      this.min = min;
    }
    if (isNil(this.max)) {
      this.max = max;
    }
    if (this.min > this.max) {
      this.min = min;
      this.max = max;
    }
  };
  Continuous.prototype.calculateTicks = function () {
    var _this = this;
    var ticks = _super.prototype.calculateTicks.call(this);
    if (!this.nice) {
      ticks = filter(ticks, function (tick) {
        return tick >= _this.min && tick <= _this.max;
      });
    }
    return ticks;
  };
  // 计算原始值值占的百分比
  Continuous.prototype.getScalePercent = function (value) {
    var max = this.max;
    var min = this.min;
    return (value - min) / (max - min);
  };
  Continuous.prototype.getInvertPercent = function (value) {
    return (value - this.rangeMin()) / (this.rangeMax() - this.rangeMin());
  };
  return Continuous;
}(Base);
export default Continuous;