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alexandre_ |
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/*
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Copyright (c) 2004-2006, The Dojo Foundation
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All Rights Reserved.
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Licensed under the Academic Free License version 2.1 or above OR the
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modified BSD license. For more information on Dojo licensing, see:
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http://dojotoolkit.org/community/licensing.shtml
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*/
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dojo.provide("dojo.widget.TreeDndControllerV3");
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dojo.require("dojo.dnd.TreeDragAndDropV3");
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dojo.require("dojo.experimental");
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dojo.experimental("Tree drag'n'drop' has lots of problems/bugs, it requires dojo drag'n'drop overhaul to work, probably in 0.5");
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dojo.widget.defineWidget("dojo.widget.TreeDndControllerV3", [dojo.widget.HtmlWidget, dojo.widget.TreeCommon], function () {
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this.dragSources = {};
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this.dropTargets = {};
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this.listenedTrees = {};
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}, {listenTreeEvents:["afterChangeTree", "beforeTreeDestroy", "afterAddChild"], listenNodeFilter:function (elem) {
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return elem instanceof dojo.widget.Widget;
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}, initialize:function (args) {
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this.treeController = dojo.lang.isString(args.controller) ? dojo.widget.byId(args.controller) : args.controller;
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if (!this.treeController) {
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dojo.raise("treeController must be declared");
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}
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}, onBeforeTreeDestroy:function (message) {
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this.unlistenTree(message.source);
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}, onAfterAddChild:function (message) {
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this.listenNode(message.child);
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}, onAfterChangeTree:function (message) {
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if (!message.oldTree) {
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return;
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}
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if (!message.newTree || !this.listenedTrees[message.newTree.widgetId]) {
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this.processDescendants(message.node, this.listenNodeFilter, this.unlistenNode);
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}
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if (!this.listenedTrees[message.oldTree.widgetId]) {
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this.processDescendants(message.node, this.listenNodeFilter, this.listenNode);
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}
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}, listenNode:function (node) {
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if (!node.tree.DndMode) {
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return;
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}
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if (this.dragSources[node.widgetId] || this.dropTargets[node.widgetId]) {
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return;
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}
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var source = null;
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var target = null;
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if (!node.actionIsDisabled(node.actions.MOVE)) {
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var source = this.makeDragSource(node);
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this.dragSources[node.widgetId] = source;
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}
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var target = this.makeDropTarget(node);
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this.dropTargets[node.widgetId] = target;
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}, makeDragSource:function (node) {
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return new dojo.dnd.TreeDragSourceV3(node.contentNode, this, node.tree.widgetId, node);
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}, makeDropTarget:function (node) {
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return new dojo.dnd.TreeDropTargetV3(node.contentNode, this.treeController, node.tree.DndAcceptTypes, node);
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}, unlistenNode:function (node) {
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if (this.dragSources[node.widgetId]) {
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dojo.dnd.dragManager.unregisterDragSource(this.dragSources[node.widgetId]);
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delete this.dragSources[node.widgetId];
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}
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if (this.dropTargets[node.widgetId]) {
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dojo.dnd.dragManager.unregisterDropTarget(this.dropTargets[node.widgetId]);
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delete this.dropTargets[node.widgetId];
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}
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}});
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