wp/nwyj/.svn/pristine/61/614da503ddba106b2503cd2b666a046be7213c60.svn-base

/*
 * Ext JS Library 2.0 Copyright(c) 2006-2007, Ext JS, LLC. licensing@extjs.com
 * 
 * http://extjs.com/license
 */

/**
 * @class Ext.tree.TreeDragZone
 * @extends Ext.dd.DragZone
 * @constructor
 * @param {String/HTMLElement/Element}
 *            tree The {@link Ext.tree.TreePanel} for which to enable dragging
 * @param {Object}
 *            config
 */
if (Ext.dd.DragZone) {
	Ext.tree.TreeDragZone = function(tree, config) {
		Ext.tree.TreeDragZone.superclass.constructor.call(this, tree
						.getTreeEl(), config);
		/**
		 * The TreePanel for this drag zone
		 * 
		 * @type Ext.tree.TreePanel
		 * @property
		 */
		this.tree = tree;
	};

	Ext.extend(Ext.tree.TreeDragZone, Ext.dd.DragZone, {
				/**
				 * @cfg {String} ddGroup A named drag drop group to which this
				 *      object belongs. If a group is specified, then this
				 *      object will only interact with other drag drop objects
				 *      in the same group (defaults to 'TreeDD').
				 */
				ddGroup : "TreeDD",

				// private
				onBeforeDrag : function(data, e) {
					var n = data.node;
					return n && n.draggable && !n.disabled;
				},

				// private
				onInitDrag : function(e) {
					var data = this.dragData;
					this.tree.getSelectionModel().select(data.node);
					this.tree.eventModel.disable();
					this.proxy.update("");
					data.node.ui.appendDDGhost(this.proxy.ghost.dom);
					this.tree.fireEvent("startdrag", this.tree, data.node, e);
				},

				// private
				getRepairXY : function(e, data) {
					return data.node.ui.getDDRepairXY();
				},

				// private
				onEndDrag : function(data, e) {
					this.tree.eventModel.enable
							.defer(100, this.tree.eventModel);
					this.tree.fireEvent("enddrag", this.tree, data.node, e);
				},

				// private
				onValidDrop : function(dd, e, id) {
					this.tree.fireEvent("dragdrop", this.tree,
							this.dragData.node, dd, e);
					this.hideProxy();
				},

				// private
				beforeInvalidDrop : function(e, id) {
					// this scrolls the original position back into view
					var sm = this.tree.getSelectionModel();
					sm.clearSelections();
					sm.select(this.dragData.node);
				}
			});
}