if(Ext.dd.DragZone){Ext.tree.TreeDragZone=function(a,b){Ext.tree.TreeDragZone.superclass.constructor.call(this,a.getTreeEl(),b);this.tree=a};Ext.extend(Ext.tree.TreeDragZone,Ext.dd.DragZone,{ddGroup:"TreeDD",onBeforeDrag:function(a,b){var c=a.node;return c&&c.draggable&&!c.disabled},onInitDrag:function(b){var a=this.dragData;this.tree.getSelectionModel().select(a.node);this.tree.eventModel.disable();this.proxy.update("");a.node.ui.appendDDGhost(this.proxy.ghost.dom);this.tree.fireEvent("startdrag",this.tree,a.node,b)},getRepairXY:function(b,a){return a.node.ui.getDDRepairXY()},onEndDrag:function(a,b){this.tree.eventModel.enable.defer(100,this.tree.eventModel);this.tree.fireEvent("enddrag",this.tree,a.node,b)},onValidDrop:function(a,b,c){this.tree.fireEvent("dragdrop",this.tree,this.dragData.node,a,b);this.hideProxy()},beforeInvalidDrop:function(a,c){var b=this.tree.getSelectionModel();b.clearSelections();b.select(this.dragData.node)},afterRepair:function(){if(Ext.enableFx&&this.tree.hlDrop){Ext.Element.fly(this.dragData.ddel).highlight(this.hlColor||"c3daf9")}this.dragging=false}})};