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// 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 Multiple Element Drag and Drop.
*
* Drag and drop implementation for sources/targets consisting of multiple
* elements.
*
* @author eae@google.com (Emil A Eklund)
* @see ../demos/dragdrop.html
*/
goog.provide('goog.fx.DragDropGroup');
goog.require('goog.dom');
goog.require('goog.fx.AbstractDragDrop');
goog.require('goog.fx.DragDropItem');
/**
* Drag/drop implementation for creating drag sources/drop targets consisting of
* multiple HTML Elements (items). All items share the same drop target(s) but
* can be dragged individually.
*
* @extends {goog.fx.AbstractDragDrop}
* @constructor
*/
goog.fx.DragDropGroup = function() {
goog.fx.AbstractDragDrop.call(this);
};
goog.inherits(goog.fx.DragDropGroup, goog.fx.AbstractDragDrop);
/**
* Add item to drag object.
*
* @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
* @override
*/
goog.fx.DragDropGroup.prototype.addItem = function(element, opt_data) {
var item = new goog.fx.DragDropItem(element, opt_data);
this.addDragDropItem(item);
};
/**
* Add DragDropItem to drag object.
*
* @param {goog.fx.DragDropItem} item DragDropItem being added to the
* drag object.
* @throws Error If no element argument is provided or if the type is
* invalid
*/
goog.fx.DragDropGroup.prototype.addDragDropItem = function(item) {
item.setParent(this);
this.items_.push(item);
if (this.isInitialized()) {
this.initItem(item);
}
};
/**
* Remove item from drag object.
*
* @param {Element|string} element Dom Node, or string representation of node
* id, that was previously added with addItem().
*/
goog.fx.DragDropGroup.prototype.removeItem = function(element) {
element = goog.dom.getElement(element);
for (var item, i = 0; item = this.items_[i]; i++) {
if (item.element == element) {
this.items_.splice(i, 1);
this.disposeItem(item);
break;
}
}
};
/**
* Marks the supplied list of items as selected. A drag operation for any of the
* selected items will affect all of them.
*
* @param {Array.<goog.fx.DragDropItem>} list List of items to select or null to
* clear selection.
*
* TODO(eae): Not yet implemented.
*/
goog.fx.DragDropGroup.prototype.setSelection = function(list) {
};
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