@deephaven/golden-layout/dist/controls/DragSourceFromEvent.js

A multi-screen javascript Layout manager

function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
import $ from 'jquery';
import { DragListener } from "../utils/index.js";
import DragProxy from "./DragProxy.js";
/**
 * Creates a drag item given a starting mouseevent
 * that can then be dragged into the Layout
 *
 * @param itemConfig the configuration for the contentItem that will be created
 * @param layoutManager
 * @param event used to get the starting position
 */
export default class DragSourceFromEvent {
  constructor(itemConfig, layoutManager, event) {
    _defineProperty(this, "_element", $(window));
    // we need something to listen for mousemoves against
    _defineProperty(this, "_itemConfig", void 0);
    _defineProperty(this, "_layoutManager", void 0);
    _defineProperty(this, "_dragListener", void 0);
    this._itemConfig = itemConfig;
    this._layoutManager = layoutManager;
    this._createDragListener(event);
  }

  /**
   * Called initially and after every drag
   */
  _createDragListener(event) {
    if (this._dragListener) {
      this._dragListener.destroy();
    }
    if (!this._element) {
      return;
    }
    if (!this._layoutManager) {
      return;
    }
    this._dragListener = new DragListener(this._element, this._layoutManager.root, true);
    this._dragListener.on('dragStart', this._onDragStart, this);
    this._dragListener.on('dragStop', this._destroy, this);

    // manaully pass in an event as mousedow, that already happened to start the dragListener
    this._dragListener.onMouseDown(event);
    this._dragListener._startDrag();
  }
  _destroy() {
    this._dragListener = undefined;
    this._element = undefined;
    this._itemConfig = undefined;
    this._layoutManager = undefined;
  }

  /**
   * Callback for the DragListener's dragStart event
   *
   * @param x the x position of the mouse on dragStart
   * @param y the x position of the mouse on dragStart
   */
  _onDragStart(x, y) {
    if (!this._dragListener || !this._layoutManager) {
      return;
    }
    var itemConfig = this._itemConfig;
    if (typeof itemConfig === 'function') {
      itemConfig = itemConfig();
    }
    var contentItem = this._layoutManager._$normalizeContentItem($.extend(true, {}, itemConfig));
    new DragProxy(x, y, this._dragListener, this._layoutManager, contentItem, null);
  }
}
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