text: // Copyright 2006 The Closure Library Authors. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //      http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS-IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  /**
   * @fileoverview Single Element Drag and Drop.
   *
   * Drag and drop implementation for sources/targets consisting of a single
   * element.
   *
   * @author eae@google.com (Emil A Eklund)
   * @see ../demos/dragdrop.html
   */
  
  goog.provide('goog.fx.DragDrop');
  
  goog.require('goog.fx.AbstractDragDrop');
  goog.require('goog.fx.DragDropItem');
  
  
  
  /**
   * Drag/drop implementation for creating drag sources/drop targets consisting of
   * a single HTML Element.
   *
   * @param {Element|string} element Dom Node, or string representation of node
   *     id, to be used as drag source/drop target.
   * @param {Object=} opt_data Data associated with the source/target.
   * @throws Error If no element argument is provided or if the type is invalid
   * @extends {goog.fx.AbstractDragDrop}
   * @constructor
   * @struct
   */
  goog.fx.DragDrop = function(element, opt_data) {
    goog.fx.AbstractDragDrop.call(this);
  
    var item = new goog.fx.DragDropItem(element, opt_data);
    item.setParent(this);
    this.items_.push(item);
  };
  goog.inherits(goog.fx.DragDrop, goog.fx.AbstractDragDrop);
  