3 <title>The source code</title>
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8 <pre class="prettyprint lang-js">/*!
10 * Copyright(c) 2006-2009 Ext JS, LLC
12 * http://www.extjs.com/license
14 <div id="cls-Ext.tree.TreeDropZone"></div>/**
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15 * @class Ext.tree.TreeDropZone
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16 * @extends Ext.dd.DropZone
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18 * @param {String/HTMLElement/Element} tree The {@link Ext.tree.TreePanel} for which to enable dropping
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19 * @param {Object} config
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21 if(Ext.dd.DropZone){
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23 Ext.tree.TreeDropZone = function(tree, config){
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24 <div id="cfg-Ext.tree.TreeDropZone-allowParentInsert"></div>/**
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25 * @cfg {Boolean} allowParentInsert
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26 * Allow inserting a dragged node between an expanded parent node and its first child that will become a
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27 * sibling of the parent when dropped (defaults to false)
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29 this.allowParentInsert = config.allowParentInsert || false;
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30 <div id="cfg-Ext.tree.TreeDropZone-allowContainerDrop"></div>/**
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31 * @cfg {String} allowContainerDrop
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32 * True if drops on the tree container (outside of a specific tree node) are allowed (defaults to false)
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34 this.allowContainerDrop = config.allowContainerDrop || false;
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35 <div id="cfg-Ext.tree.TreeDropZone-appendOnly"></div>/**
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36 * @cfg {String} appendOnly
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37 * True if the tree should only allow append drops (use for trees which are sorted, defaults to false)
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39 this.appendOnly = config.appendOnly || false;
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41 Ext.tree.TreeDropZone.superclass.constructor.call(this, tree.getTreeEl(), config);
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42 <div id="prop-Ext.tree.TreeDropZone-tree"></div>/**
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43 * The TreePanel for this drop zone
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44 * @type Ext.tree.TreePanel
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48 <div id="prop-Ext.tree.TreeDropZone-dragOverData"></div>/**
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49 * Arbitrary data that can be associated with this tree and will be included in the event object that gets
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50 * passed to any nodedragover event handler (defaults to {})
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51 * @type Ext.tree.TreePanel
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54 this.dragOverData = {};
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56 this.lastInsertClass = "x-tree-no-status";
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59 Ext.extend(Ext.tree.TreeDropZone, Ext.dd.DropZone, {
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60 <div id="cfg-Ext.tree.TreeDropZone-ddGroup"></div>/**
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61 * @cfg {String} ddGroup
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62 * A named drag drop group to which this object belongs. If a group is specified, then this object will only
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63 * interact with other drag drop objects in the same group (defaults to 'TreeDD').
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67 <div id="cfg-Ext.tree.TreeDropZone-expandDelay"></div>/**
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68 * @cfg {String} expandDelay
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69 * The delay in milliseconds to wait before expanding a target tree node while dragging a droppable node
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70 * over the target (defaults to 1000)
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75 expandNode : function(node){
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76 if(node.hasChildNodes() && !node.isExpanded()){
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77 node.expand(false, null, this.triggerCacheRefresh.createDelegate(this));
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82 queueExpand : function(node){
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83 this.expandProcId = this.expandNode.defer(this.expandDelay, this, [node]);
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87 cancelExpand : function(){
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88 if(this.expandProcId){
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89 clearTimeout(this.expandProcId);
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90 this.expandProcId = false;
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95 isValidDropPoint : function(n, pt, dd, e, data){
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96 if(!n || !data){ return false; }
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97 var targetNode = n.node;
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98 var dropNode = data.node;
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99 // default drop rules
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100 if(!(targetNode && targetNode.isTarget && pt)){
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103 if(pt == "append" && targetNode.allowChildren === false){
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106 if((pt == "above" || pt == "below") && (targetNode.parentNode && targetNode.parentNode.allowChildren === false)){
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109 if(dropNode && (targetNode == dropNode || dropNode.contains(targetNode))){
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112 // reuse the object
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113 var overEvent = this.dragOverData;
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114 overEvent.tree = this.tree;
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115 overEvent.target = targetNode;
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116 overEvent.data = data;
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117 overEvent.point = pt;
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118 overEvent.source = dd;
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119 overEvent.rawEvent = e;
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120 overEvent.dropNode = dropNode;
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121 overEvent.cancel = false;
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122 var result = this.tree.fireEvent("nodedragover", overEvent);
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123 return overEvent.cancel === false && result !== false;
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127 getDropPoint : function(e, n, dd){
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130 return tn.allowChildren !== false ? "append" : false; // always append for root
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132 var dragEl = n.ddel;
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133 var t = Ext.lib.Dom.getY(dragEl), b = t + dragEl.offsetHeight;
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134 var y = Ext.lib.Event.getPageY(e);
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135 var noAppend = tn.allowChildren === false || tn.isLeaf();
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136 if(this.appendOnly || tn.parentNode.allowChildren === false){
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137 return noAppend ? false : "append";
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139 var noBelow = false;
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140 if(!this.allowParentInsert){
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141 noBelow = tn.hasChildNodes() && tn.isExpanded();
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143 var q = (b - t) / (noAppend ? 2 : 3);
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144 if(y >= t && y < (t + q)){
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146 }else if(!noBelow && (noAppend || y >= b-q && y <= b)){
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154 onNodeEnter : function(n, dd, e, data){
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155 this.cancelExpand();
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158 onContainerOver : function(dd, e, data) {
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159 if (this.allowContainerDrop && this.isValidDropPoint({ ddel: this.tree.getRootNode().ui.elNode, node: this.tree.getRootNode() }, "append", dd, e, data)) {
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160 return this.dropAllowed;
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162 return this.dropNotAllowed;
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166 onNodeOver : function(n, dd, e, data){
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167 var pt = this.getDropPoint(e, n, dd);
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170 // auto node expand check
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171 if(!this.expandProcId && pt == "append" && node.hasChildNodes() && !n.node.isExpanded()){
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172 this.queueExpand(node);
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173 }else if(pt != "append"){
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174 this.cancelExpand();
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177 // set the insert point style on the target node
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178 var returnCls = this.dropNotAllowed;
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179 if(this.isValidDropPoint(n, pt, dd, e, data)){
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184 returnCls = n.node.isFirst() ? "x-tree-drop-ok-above" : "x-tree-drop-ok-between";
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185 cls = "x-tree-drag-insert-above";
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186 }else if(pt == "below"){
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187 returnCls = n.node.isLast() ? "x-tree-drop-ok-below" : "x-tree-drop-ok-between";
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188 cls = "x-tree-drag-insert-below";
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190 returnCls = "x-tree-drop-ok-append";
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191 cls = "x-tree-drag-append";
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193 if(this.lastInsertClass != cls){
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194 Ext.fly(el).replaceClass(this.lastInsertClass, cls);
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195 this.lastInsertClass = cls;
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203 onNodeOut : function(n, dd, e, data){
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204 this.cancelExpand();
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205 this.removeDropIndicators(n);
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209 onNodeDrop : function(n, dd, e, data){
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210 var point = this.getDropPoint(e, n, dd);
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211 var targetNode = n.node;
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212 targetNode.ui.startDrop();
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213 if(!this.isValidDropPoint(n, point, dd, e, data)){
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214 targetNode.ui.endDrop();
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217 // first try to find the drop node
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218 var dropNode = data.node || (dd.getTreeNode ? dd.getTreeNode(data, targetNode, point, e) : null);
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219 return this.processDrop(targetNode, data, point, dd, e, dropNode);
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222 onContainerDrop : function(dd, e, data){
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223 if (this.allowContainerDrop && this.isValidDropPoint({ ddel: this.tree.getRootNode().ui.elNode, node: this.tree.getRootNode() }, "append", dd, e, data)) {
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224 var targetNode = this.tree.getRootNode();
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225 targetNode.ui.startDrop();
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226 var dropNode = data.node || (dd.getTreeNode ? dd.getTreeNode(data, targetNode, 'append', e) : null);
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227 return this.processDrop(targetNode, data, 'append', dd, e, dropNode);
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233 processDrop: function(target, data, point, dd, e, dropNode){
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241 dropNode: dropNode,
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245 var retval = this.tree.fireEvent("beforenodedrop", dropEvent);
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246 if(retval === false || dropEvent.cancel === true || !dropEvent.dropNode){
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247 target.ui.endDrop();
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248 return dropEvent.dropStatus;
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251 target = dropEvent.target;
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252 if(point == 'append' && !target.isExpanded()){
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253 target.expand(false, null, function(){
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254 this.completeDrop(dropEvent);
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255 }.createDelegate(this));
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257 this.completeDrop(dropEvent);
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263 completeDrop : function(de){
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264 var ns = de.dropNode, p = de.point, t = de.target;
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265 if(!Ext.isArray(ns)){
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269 for(var i = 0, len = ns.length; i < len; i++){
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272 t.parentNode.insertBefore(n, t);
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273 }else if(p == "below"){
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274 t.parentNode.insertBefore(n, t.nextSibling);
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280 if(Ext.enableFx && this.tree.hlDrop){
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284 this.tree.fireEvent("nodedrop", de);
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288 afterNodeMoved : function(dd, data, e, targetNode, dropNode){
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289 if(Ext.enableFx && this.tree.hlDrop){
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290 dropNode.ui.focus();
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291 dropNode.ui.highlight();
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293 this.tree.fireEvent("nodedrop", this.tree, targetNode, data, dd, e);
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297 getTree : function(){
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302 removeDropIndicators : function(n){
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305 Ext.fly(el).removeClass([
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306 "x-tree-drag-insert-above",
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307 "x-tree-drag-insert-below",
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308 "x-tree-drag-append"]);
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309 this.lastInsertClass = "_noclass";
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314 beforeDragDrop : function(target, e, id){
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315 this.cancelExpand();
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320 afterRepair : function(data){
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321 if(data && Ext.enableFx){
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322 data.node.ui.highlight();
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