kitten-components/dist/javascripts/kitten/components/sliders/slider-with-tooltip-and-power.js

Front-end components library

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.SliderWithTooltipAndPower = undefined;

var _createClass = function () { 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); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _sliderBar = require('kitten/components/sliders/slider-bar');

var _sliderKeyDownHandler = require('kitten/handlers/sliders/slider-key-down-handler');

var _sliderTooltip = require('kitten/components/sliders/slider-tooltip');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var SliderWithTooltipAndPower = exports.SliderWithTooltipAndPower = function (_React$Component) {
  _inherits(SliderWithTooltipAndPower, _React$Component);

  function SliderWithTooltipAndPower(props) {
    _classCallCheck(this, SliderWithTooltipAndPower);

    var _this = _possibleConstructorReturn(this, (SliderWithTooltipAndPower.__proto__ || Object.getPrototypeOf(SliderWithTooltipAndPower)).call(this, props));

    _this.handleMove = _this.handleMove.bind(_this);
    _this.handleKeyDown = _sliderKeyDownHandler.sliderKeyDownHandler.bind(_this);
    return _this;
  }

  // Allow other components to focus


  _createClass(SliderWithTooltipAndPower, [{
    key: 'focus',
    value: function focus() {
      this.refs.focus();
    }
  }, {
    key: 'handleMove',
    value: function handleMove(ratio) {
      var _props = this.props,
          min = _props.min,
          max = _props.max;

      var powerRatio = this.computePowerRatio(ratio);
      var value = Math.round(powerRatio * (max - min) + min);
      this.move(value);
    }
  }, {
    key: 'ratio',
    value: function ratio() {
      return this.ratioForValue(this.props.value);
    }
  }, {
    key: 'move',
    value: function move(to) {
      var value = this.valueInBounds(to);
      var ratio = this.ratioForValue(value);
      this.setState({ ratio: ratio });
      this.props.onChange(value, ratio);
    }

    // Turns a normal ratio (between 0 and 1) into a ratio with a different
    // distribution based on the power.
    //
    // Example:
    //   computePowerRatio(0) # => 0
    //   computePowerRatio(0.5) # => 0.76534543
    //   computePowerRatio(1) # => 1

  }, {
    key: 'computePowerRatio',
    value: function computePowerRatio(ratio) {
      return ratio < 0 ? 0 : Math.pow(ratio, this.props.power);
    }

    // Inverse of computePowerRatio. Turns a powered ratio (between 0 and 1) into
    // the ratio where we should place the slider.
    //
    // Example:
    //   computeRatio(0) # => 0
    //   computeRatio(0.76534543) # => 0.5
    //   computeRatio(1) # => 1

  }, {
    key: 'computeRatio',
    value: function computeRatio(powerRatio) {
      return Math.pow(powerRatio, 1 / this.props.power);
    }
  }, {
    key: 'ratioForValue',
    value: function ratioForValue(value) {
      var _props2 = this.props,
          min = _props2.min,
          max = _props2.max;


      if (value === null || isNaN(value)) return 0;

      var powerRatio = (value - min) / (max - min);
      return this.ratioInBounds(this.computeRatio(powerRatio));
    }
  }, {
    key: 'ratioInBounds',
    value: function ratioInBounds(ratio) {
      return ratio > 1 ? 1 : ratio < 0 ? 0 : ratio;
    }
  }, {
    key: 'valueInBounds',
    value: function valueInBounds(value) {
      var _props3 = this.props,
          min = _props3.min,
          max = _props3.max,
          step = _props3.step;


      if (value === null) return min < max ? min : max;

      if (min < max) {
        if (value < min) return min;else if (value > max) return max;
      } else {
        if (value > min) return min;else if (value < max) return max;
      }

      return Math.round(value / step) * step;
    }
  }, {
    key: 'render',
    value: function render() {
      var _React$createElement;

      return _react2.default.createElement(
        'div',
        null,
        _react2.default.createElement(
          _sliderTooltip.SliderTooltip,
          {
            className: this.props.tooltipClass,
            percentage: this.ratio() * 100 + '%'
          },
          this.props.tooltipText
        ),
        _react2.default.createElement(_sliderBar.SliderBar, (_React$createElement = {
          onAction: this.props.onAction,
          onMove: this.props.onMove,
          name: this.props.name,
          value: this.props.value,
          min: this.props.min,
          max: this.props.max,
          ratio: this.ratio()
        }, _defineProperty(_React$createElement, 'onMove', this.handleMove), _defineProperty(_React$createElement, 'onStart', this.handleStart), _defineProperty(_React$createElement, 'onClick', this.handleClick), _defineProperty(_React$createElement, 'onAction', this.props.onAction), _defineProperty(_React$createElement, 'onKeyDown', this.handleKeyDown), _React$createElement))
      );
    }
  }]);

  return SliderWithTooltipAndPower;
}(_react2.default.Component);

SliderWithTooltipAndPower.defaultProps = {
  value: null,
  min: 0,
  max: 100,
  step: 1,
  power: 1,
  onChange: function onChange() {},
  onChangeEnd: function onChangeEnd() {}
};