Want to implement a custom drag don't rebound, if not call myChart. The clear () error will cause the links,
If the call the clear () can lead to all the nodes to recalculate the position, the effect is very bad,,

 myChart. On (' contextmenu ', function (params) {
Var option=myChart. GetOption (); 
Option. The series [0]. Data [params. DataIndex]. X=params. Event. OffsetX; 
Option. The series [0]. Data [params. DataIndex] y=params. Event. OffsetY; 
Option. The series [0]. Data [params. DataIndex]. Fixed=true; 
//myChart. The clear (); 
MyChart. SetOption (option); 
}); 

As shown in figure: