kepler.gl/dist/components/common/range-brush.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;

var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));

var _classCallCheck2 = _interopRequireDefault(require("@babel/runtime/helpers/classCallCheck"));

var _createClass2 = _interopRequireDefault(require("@babel/runtime/helpers/createClass"));

var _possibleConstructorReturn2 = _interopRequireDefault(require("@babel/runtime/helpers/possibleConstructorReturn"));

var _getPrototypeOf3 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));

var _assertThisInitialized2 = _interopRequireDefault(require("@babel/runtime/helpers/assertThisInitialized"));

var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

var _taggedTemplateLiteral2 = _interopRequireDefault(require("@babel/runtime/helpers/taggedTemplateLiteral"));

var _react = _interopRequireWildcard(require("react"));

var _propTypes = _interopRequireDefault(require("prop-types"));

var _styledComponents = _interopRequireDefault(require("styled-components"));

var _d3Selection = require("d3-selection");

var _d3Brush = require("d3-brush");

function _templateObject() {
  var data = (0, _taggedTemplateLiteral2["default"])(["\n  .selection {\n    stroke: none;\n    fill: ", ";\n    opacity: 1;\n  }\n"]);

  _templateObject = function _templateObject() {
    return data;
  };

  return data;
}

var StyledG = _styledComponents["default"].g(_templateObject(), function (props) {
  return props.theme.rangeBrushBgd;
});

var RangeBrush =
/*#__PURE__*/
function (_Component) {
  (0, _inherits2["default"])(RangeBrush, _Component);

  function RangeBrush() {
    var _getPrototypeOf2;

    var _this;

    (0, _classCallCheck2["default"])(this, RangeBrush);

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = (0, _possibleConstructorReturn2["default"])(this, (_getPrototypeOf2 = (0, _getPrototypeOf3["default"])(RangeBrush)).call.apply(_getPrototypeOf2, [this].concat(args)));
    (0, _defineProperty2["default"])((0, _assertThisInitialized2["default"])(_this), "rootContainer", (0, _react.createRef)());
    return _this;
  }

  (0, _createClass2["default"])(RangeBrush, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      var _this2 = this;

      // We want the React app to respond to brush state and vice-versa
      // but d3-brush fires the same events for both user-initiated brushing
      // and programmatic brushing (brush.move). We need these flags to
      // distinguish between the uses.
      //
      // We don't use state because that would trigger another `componentDidUpdate`
      this.brushing = false;
      this.moving = false;
      this.root = (0, _d3Selection.select)(this.rootContainer.current);
      this.brush = (0, _d3Brush.brushX)().on('start', function () {
        _this2.brushing = true;
      }).on('brush', function () {
        if (_this2.moving) {
          return;
        }

        _d3Selection.event.selection === null ? _this2._reset() : _this2._brush(_d3Selection.event.selection);
      }).on('end', function () {
        if (!_this2.moving && _d3Selection.event.selection === null) {
          _this2._reset();
        }

        _this2.brushing = false;
        _this2.moving = false;
      });
      this.root.call(this.brush);
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate(prevProps) {
      var _this$props = this.props,
          _this$props$value = (0, _slicedToArray2["default"])(_this$props.value, 2),
          val0 = _this$props$value[0],
          val1 = _this$props$value[1],
          width = _this$props.width;

      var _prevProps$value = (0, _slicedToArray2["default"])(prevProps.value, 2),
          prevVal0 = _prevProps$value[0],
          prevVal1 = _prevProps$value[1];

      if (prevProps.width !== width) {
        // width change should not trigger this._brush
        this.moving = true;
        this.root.call(this.brush);

        this._move(val0, val1);
      }

      if (!this.brushing && !this.moving) {
        if (prevVal0 !== val0 || prevVal1 !== val1) {
          this.moving = true;

          this._move(val0, val1);
        }
      }
    }
  }, {
    key: "_reset",
    value: function _reset() {
      var _this$props$range = (0, _slicedToArray2["default"])(this.props.range, 2),
          minValue = _this$props$range[0],
          maxValue = _this$props$range[1];

      this._onBrush(minValue, maxValue);
    }
  }, {
    key: "_move",
    value: function _move(val0, val1) {
      var _this$props2 = this.props,
          _this$props2$domain = (0, _slicedToArray2["default"])(_this$props2.domain, 2),
          min = _this$props2$domain[0],
          max = _this$props2$domain[1],
          width = _this$props2.width;

      var scale = function scale(x) {
        return (x - min) * width / (max - min);
      };

      this.brush.move(this.root, [scale(val0), scale(val1)]);
    }
  }, {
    key: "_brush",
    value: function _brush(_ref) {
      var _ref2 = (0, _slicedToArray2["default"])(_ref, 2),
          sel0 = _ref2[0],
          sel1 = _ref2[1];

      var _this$props3 = this.props,
          _this$props3$domain = (0, _slicedToArray2["default"])(_this$props3.domain, 2),
          min = _this$props3$domain[0],
          max = _this$props3$domain[1],
          width = _this$props3.width;

      var invert = function invert(x) {
        return x * (max - min) / width + min;
      };

      this._onBrush(invert(sel0), invert(sel1));
    }
  }, {
    key: "_onBrush",
    value: function _onBrush(val0, val1) {
      var _this$props$value2 = (0, _slicedToArray2["default"])(this.props.value, 2),
          currentVal0 = _this$props$value2[0],
          currentVal1 = _this$props$value2[1];

      if (currentVal0 === val0 && currentVal1 === val1) {
        return;
      }

      this.props.onBrush(val0, val1);
    }
  }, {
    key: "render",
    value: function render() {
      return _react["default"].createElement(StyledG, {
        className: "kg-range-slider__brush",
        ref: this.rootContainer
      });
    }
  }]);
  return RangeBrush;
}(_react.Component);

exports["default"] = RangeBrush;
(0, _defineProperty2["default"])(RangeBrush, "propTypes", {
  domain: _propTypes["default"].arrayOf(_propTypes["default"].number).isRequired,
  onBrush: _propTypes["default"].func.isRequired,
  range: _propTypes["default"].arrayOf(_propTypes["default"].number).isRequired,
  value: _propTypes["default"].arrayOf(_propTypes["default"].number).isRequired,
  width: _propTypes["default"].number.isRequired
});
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IN NO EVENT SHALL THE\n// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\n// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\n// THE SOFTWARE.\n\nimport React, {Component, createRef} from 'react';\nimport PropTypes from 'prop-types';\nimport styled from 'styled-components';\nimport {event, select} from 'd3-selection';\nimport {brushX} from 'd3-brush';\n\nconst StyledG = styled.g`\n  .selection {\n    stroke: none;\n    fill: ${props => props.theme.rangeBrushBgd};\n    opacity: 1;\n  }\n`;\n\nexport default class RangeBrush extends Component {\n  static propTypes = {\n    domain: PropTypes.arrayOf(PropTypes.number).isRequired,\n    onBrush: PropTypes.func.isRequired,\n    range: PropTypes.arrayOf(PropTypes.number).isRequired,\n    value: PropTypes.arrayOf(PropTypes.number).isRequired,\n    width: PropTypes.number.isRequired\n  };\n\n  componentDidMount() {\n    // We want the React app to respond to brush state and vice-versa\n    // but d3-brush fires the same events for both user-initiated brushing\n    // and programmatic brushing (brush.move). We need these flags to\n    // distinguish between the uses.\n    //\n    // We don't use state because that would trigger another `componentDidUpdate`\n\n    this.brushing = false;\n    this.moving = false;\n\n    this.root = select(this.rootContainer.current);\n    this.brush = brushX()\n      .on('start', () => {\n        this.brushing = true;\n      })\n      .on('brush', () => {\n        if (this.moving) {\n          return;\n        }\n        event.selection === null ? this._reset() : this._brush(event.selection);\n      })\n      .on('end', () => {\n        if (!this.moving && event.selection === null) {\n          this._reset();\n        }\n\n        this.brushing = false;\n        this.moving = false;\n      });\n\n    this.root.call(this.brush);\n  }\n\n  componentDidUpdate(prevProps) {\n    const {\n      value: [val0, val1],\n      width\n    } = this.props;\n    const [prevVal0, prevVal1] = prevProps.value;\n\n    if (prevProps.width !== width) {\n      // width change should not trigger this._brush\n      this.moving = true;\n      this.root.call(this.brush);\n      this._move(val0, val1);\n    }\n\n    if (!this.brushing && !this.moving) {\n      if (prevVal0 !== val0 || prevVal1 !== val1) {\n        this.moving = true;\n        this._move(val0, val1);\n      }\n    }\n  }\n\n  rootContainer = createRef();\n\n  _reset() {\n    const [minValue, maxValue] = this.props.range;\n    this._onBrush(minValue, maxValue);\n  }\n\n  _move(val0, val1) {\n    const {\n      domain: [min, max],\n      width\n    } = this.props;\n    const scale = x => ((x - min) * width) / (max - min);\n    this.brush.move(this.root, [scale(val0), scale(val1)]);\n  }\n\n  _brush([sel0, sel1]) {\n    const {\n      domain: [min, max],\n      width\n    } = this.props;\n    const invert = x => (x * (max - min)) / width + min;\n    this._onBrush(invert(sel0), invert(sel1));\n  }\n\n  _onBrush(val0, val1) {\n    const {\n      value: [currentVal0, currentVal1]\n    } = this.props;\n\n    if (currentVal0 === val0 && currentVal1 === val1) {\n      return;\n    }\n\n    this.props.onBrush(val0, val1);\n  }\n  render() {\n    return <StyledG className=\"kg-range-slider__brush\" ref={this.rootContainer} />;\n  }\n}\n"]}