mxVertexHandler.prototype.isRotationHandleVisible=function(){return this.graph.isEnabled()&&this.rotationEnabled&&!this.graph.isCellLocked(this.state.cell)&&this.graph.isCellRotatable(this.state.cell)&&(0>=mxGraphHandler.prototype.maxCells||this.graph.getSelectionCount()<mxGraphHandler.prototype.maxCells)};mxVertexHandler.prototype.isConstrainedEvent=function(a){return mxEvent.isShiftDown(a.getEvent())||"fixed"==this.state.style[mxConstants.STYLE_ASPECT]};