@instructure/quiz-interactions/lib/components/hotspot/common/Polygon/index.js

A React UI component Library for quiz interaction types.

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
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 _getPrototypeOf2 = _interopRequireDefault(require("@babel/runtime/helpers/getPrototypeOf"));
var _inherits2 = _interopRequireDefault(require("@babel/runtime/helpers/inherits"));
var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
var _react = _interopRequireWildcard(require("react"));
var _Canvas = _interopRequireDefault(require("../Canvas"));
var _propTypes = _interopRequireWildcard(require("../Canvas/propTypes"));
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { "default": obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj["default"] = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _callSuper(_this, derived, args) {
  function isNativeReflectConstruct() {
    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
    if (Reflect.construct.sham) return false;
    if (typeof Proxy === "function") return true;
    try {
      return !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
    } catch (e) {
      return false;
    }
  }
  derived = (0, _getPrototypeOf2["default"])(derived);
  return (0, _possibleConstructorReturn2["default"])(_this, isNativeReflectConstruct() ? Reflect.construct(derived, args || [], (0, _getPrototypeOf2["default"])(_this).constructor) : derived.apply(_this, args));
}
var Polygon = exports["default"] = /*#__PURE__*/function (_Component) {
  function Polygon() {
    var _this2;
    (0, _classCallCheck2["default"])(this, Polygon);
    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }
    _this2 = _callSuper(this, Polygon, [].concat(args));
    (0, _defineProperty2["default"])(_this2, "canvasRef", function (node) {
      _this2.canvas = node;
    });
    (0, _defineProperty2["default"])(_this2, "drawShape", function (coordinates) {
      if (coordinates.length === 0) return;
      var ctx = _this2.canvas.canvasElement.getContext('2d');
      _this2.canvas.setStrokeStyle();
      coordinates.forEach(function (item, index, array) {
        var nextCoordinate = array[index + 1];
        if (nextCoordinate !== void 0) {
          var initialCoord = null;
          if (index === 0) {
            initialCoord = item;
          }
          _this2.__drawLine(initialCoord, nextCoordinate);
        }
      });
      _this2.canvas.setFillStyle();
      ctx.fill();
    });
    (0, _defineProperty2["default"])(_this2, "onMouseMove", function (e) {
      if (_this2.canvas.isDrawing()) {
        _this2.clearCanvas();
        var currentCoordinate = _this2.canvas.getCurrentCoordinates(e);
        var lines = _this2.props.coordinates.concat([currentCoordinate]); // add temporary coordinate

        // add initial coordinate at the end of the array to close the polygon
        if (lines.length > 2) {
          lines = lines.concat([lines[0]]);
        }
        _this2.drawShape(lines);
      }
    });
    (0, _defineProperty2["default"])(_this2, "onMouseOut", function (e) {
      if (_this2.canvas.isDrawing()) {
        var initialCoordinate = _this2.canvas.getInitialCoordinate();
        var newCoordinates = _this2.props.coordinates.concat([initialCoordinate]);
        if (newCoordinates.length > 3) {
          _this2.clearCanvas();
          _this2.drawShape(newCoordinates);
          _this2.canvas.stopDrawing(newCoordinates);
        }
      }
    });
    (0, _defineProperty2["default"])(_this2, "onDoubleClick", function () {
      _this2.clearCanvas();
      var initialCoordinate = _this2.canvas.getInitialCoordinate();
      var newCoordinates = _this2.props.coordinates.concat([initialCoordinate]);
      _this2.drawShape(newCoordinates);
      if (_this2.canvas.isDrawing()) {
        _this2.canvas.stopDrawing(newCoordinates);
      }
    });
    (0, _defineProperty2["default"])(_this2, "onClick", function (e) {
      if (_this2.canvas.isDrawing()) {
        _this2.clearCanvas();
        var currentCoordinate = _this2.canvas.getCurrentCoordinates(e);
        var lastCoordinate = _this2.canvas.getLastCoordinate();
        if (currentCoordinate.x === lastCoordinate.x && currentCoordinate.y === lastCoordinate.y) {
          return; // in case the user click at the same point, this click is discarded
        }
        var newCoordinates = _this2.props.coordinates.concat([currentCoordinate]);
        _this2.drawShape(newCoordinates);
        _this2.props.handleSetCoordinates(newCoordinates, true);
      } else {
        _this2.canvas.startDrawing(e);
      }
    });
    return _this2;
  }
  (0, _inherits2["default"])(Polygon, _Component);
  return (0, _createClass2["default"])(Polygon, [{
    key: "__drawLine",
    value: function __drawLine(begin, end) {
      var ctx = this.canvas.canvasElement.getContext('2d');
      if (begin) {
        ctx.beginPath();
        ctx.moveTo(begin.x, begin.y);
      }
      ctx.lineTo(end.x, end.y);
      ctx.stroke();
    }

    // ===========
    //   ACTIONS
    // ===========
  }, {
    key: "clearCanvas",
    value: function clearCanvas() {
      var ctx = this.canvas.canvasElement.getContext('2d');
      ctx.clearRect(0, 0, this.canvas.canvasElement.width, this.canvas.canvasElement.height);
      ctx.beginPath();
      ctx.closePath();
    }
  }, {
    key: "render",
    value: function render() {
      return /*#__PURE__*/_react["default"].createElement(_Canvas["default"], Object.assign({
        realRef: this.canvasRef,
        drawShape: this.drawShape,
        onMouseMove: this.onMouseMove,
        onMouseOut: this.onMouseOut,
        onDoubleClick: this.onDoubleClick,
        onClick: this.onClick
      }, (0, _propTypes.pickProps)(this.props)));
    }
  }]);
}(_react.Component);
(0, _defineProperty2["default"])(Polygon, "propTypes", _propTypes["default"]);
(0, _defineProperty2["default"])(Polygon, "defaultProps", _propTypes.defaultProps);