kitten-components/dist/javascripts/kitten/components/form/slider.js

Front-end components library

'use strict';

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

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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 _propTypes = require('prop-types');

var _propTypes2 = _interopRequireDefault(_propTypes);

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

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

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: 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; } // TODO move to the "sliders" group (breaking change)

// Slider input to choose an integer value between two bounds
var Slider = exports.Slider = function (_React$Component) {
  _inherits(Slider, _React$Component);

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

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

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

  // Allow other components to focus


  _createClass(Slider, [{
    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 value = Math.round(ratio * (max - min) + min);
      this.move(value);
    }
  }, {
    key: 'ratio',
    value: function ratio() {
      return this.ratioForValue(this.props.value);
    }
  }, {
    key: 'ratioForValue',
    value: function ratioForValue(value) {
      var _props2 = this.props,
          min = _props2.min,
          max = _props2.max;

      return value === null ? min : this.ratioInBounds((value - min) / (max - min));
    }
  }, {
    key: 'move',
    value: function move(to) {
      var value = this.valueInBounds(to);
      this.props.onChange(value, this.ratioForValue(value));
    }
  }, {
    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() {
      return _react2.default.createElement(_sliderBar.SliderBar, _extends({
        ref: 'contents'
      }, this.props, this.state, {
        onMove: this.handleMove,
        onStart: this.handleStart,
        onClick: this.handleClick,
        onAction: this.props.onAction,
        ratio: this.ratio()
      }));
    }
  }]);

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

Slider.propTypes = {
  // Starting value (e.g. 50)
  initialValue: _propTypes2.default.number,

  // Minimum possible value (e.g. 0)
  min: _propTypes2.default.number,

  // Maximum possible value (e.g. 100)
  max: _propTypes2.default.number,

  // Space between each possible value when updated by keyboard (e.g. 1)
  step: _propTypes2.default.number,

  // Input name, if needed (e.g. "amount")
  name: _propTypes2.default.string,

  // Callback when the value changes (clicked or while dragging)
  // passes the current value and percentage as an argument
  //
  // You should use the given value and pass it back to the Slider props
  // to re-render the Slider value at the correct position.
  onChange: _propTypes2.default.func,

  // Callback when we click, touch or focus
  onAction: _propTypes2.default.func
};

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

  // DEPRECATED: do not use default export.
};exports.default = Slider;