flymis/WebRoot/dojojs/src/dnd/TreeDragAndDrop.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

/**
 * TreeDrag* specialized on managing subtree drags
 * It selects nodes and visualises what's going on,
 * but delegates real actions upon tree to the controller
 *
 * This code is considered a part of controller
*/

dojo.provide("dojo.dnd.TreeDragAndDrop");

dojo.require("dojo.dnd.HtmlDragAndDrop");
dojo.require("dojo.lang.func");
dojo.require("dojo.lang.array");
dojo.require("dojo.lang.extras");
dojo.require("dojo.html.layout");

dojo.dnd.TreeDragSource = function(node, syncController, type, treeNode){
	this.controller = syncController;
	this.treeNode = treeNode;

	dojo.dnd.HtmlDragSource.call(this, node, type);
}

dojo.inherits(dojo.dnd.TreeDragSource, dojo.dnd.HtmlDragSource);

dojo.lang.extend(dojo.dnd.TreeDragSource, {
	onDragStart: function(){
		/* extend adds functions to prototype */
		var dragObject = dojo.dnd.HtmlDragSource.prototype.onDragStart.call(this);
		//dojo.debugShallow(dragObject)

		dragObject.treeNode = this.treeNode;

		dragObject.onDragStart = dojo.lang.hitch(dragObject, function(e) {

			/* save selection */
			this.savedSelectedNode = this.treeNode.tree.selector.selectedNode;
			if (this.savedSelectedNode) {
				this.savedSelectedNode.unMarkSelected();
			}

			var result = dojo.dnd.HtmlDragObject.prototype.onDragStart.apply(this, arguments);


			/* remove background grid from cloned object */
			var cloneGrid = this.dragClone.getElementsByTagName('img');
			for(var i=0; i<cloneGrid.length; i++) {
				cloneGrid.item(i).style.backgroundImage='url()';
			}