"keydown",this.keyHandler);mxEvent.addListener(document,"keyup",this.keyHandler)}mxGraphHandler.prototype.graph=null;mxGraphHandler.prototype.maxCells=mxClient.IS_IE?20:50;mxGraphHandler.prototype.enabled=!0;mxGraphHandler.prototype.highlightEnabled=!0;mxGraphHandler.prototype.cloneEnabled=!0;mxGraphHandler.prototype.moveEnabled=!0;mxGraphHandler.prototype.guidesEnabled=!1;mxGraphHandler.prototype.handlesVisible=!0;mxGraphHandler.prototype.guide=null;mxGraphHandler.prototype.currentDx=null;