The drag and drop function of tree in Extjs4 (you can drag and drop between two trees) simple example_javascript skills

//As long as you want to configure the viewConfig in the treepanel, if it is Between two trees, both trees must be configured
viewConfig:{
plugins:{
ptype:'treeviewdragdrop',
appendOnly:true //Only non-leaf nodes can be dragged
},
listeners:{//Listener
drop:function(node,data,overModel,dropPosition,options){
//Ajax operation synchronizes data to the background database
alert("Move:" data.records[0].get('text') " to: " overModel.get("text")); 
 },
 beforedrop:function(node,data, overModel,dropPosition,dropFunction,options){
// if(overModel.get("leaf")){ //Target node
// overModel.set('leaf',false);
/ / }
}
}
}