code: function mxHandle(state, cursor, image)
  {
  	this.graph = state.view.graph;
  	this.state = state;
  	this.cursor = (cursor != null) ? cursor : this.cursor;
  	this.image = (image != null) ? image : this.image;
  	this.init();
  }
docs: Copyright (c) 2006-2015, JGraph Ltd
  Copyright (c) 2006-2015, Gaudenz Alder
   
  Class: mxHandle
  
  Implements a single custom handle for vertices.
  
  Constructor: mxHandle
  
  Constructs a new handle for the given state.
  
  Parameters:
  
  state - <mxCellState> of the cell to be handled.