A simple example of the drag-and-drop function of tree in EXTJS4

This article introduces the Extjs4 of tree in the simple example of drag and drop function, the need for friends can refer to the code as follows://As long as the Treepanel in the configuration of Viewconfig can be, if it is between two trees, two trees must be configured viewconfig:{PL Ugins: {ptype: ' Treeviewdragdrop ', appendonly:true//can only be dragged with non-leaf nodes}, listeners:{//Listener drop:function (node , data,overmodel,dropposition,options) {//ajax's operation synchronizes the data to the background database alert ("Put:" +data.records[0].get (' text ') + "move to:" +overm         Odel.get ("text")); }, Beforedrop:function (node,data,overmodel,dropposition,dropfunction,options) {//if (Overmodel.get ("leaf")) {//Mesh Superscript node//overmodel.set (' leaf ', false); //     }     }    }   }