mxGraphHandler.prototype.getPreviewBounds=function(a){a=this.getBoundingBox(a);null!=a&&(a.width=Math.max(0,a.width-1),a.height=Math.max(0,a.height-1),a.width<this.minimumSize?(a.x-=(this.minimumSize-a.width)/2,a.width=this.minimumSize):(a.x=Math.round(a.x),a.width=Math.ceil(a.width)),a.height<this.minimumSize?(a.y-=(this.minimumSize-a.height)/2,a.height=this.minimumSize):(a.y=Math.round(a.y),a.height=Math.ceil(a.height)));return a};