question: private double adjustTransform ( ) { double xMin = Double . POSITIVE_INFINITY ; double xMax = Double . NEGATIVE_INFINITY ; double yMin = Double . POSITIVE_INFINITY ; double yMax = Double . NEGATIVE_INFINITY ; for ( Variable var : csp . getVariables ( ) ) { Point2D point = getPosition ( var ) ; xMin = Math . min ( xMin , point . getX ( ) ) ; xMax = Math . max ( xMax , point . getX ( ) ) ; yMin = Math . min ( yMin , point . getY ( ) ) ; yMax = Math . max ( yMax , point . getY ( ) ) ; } double scale = Math . min ( pane . getWidth ( ) / ( xMax - xMin + 300 ) , pane . getHeight ( ) / ( yMax - yMin + 150 ) ) ; pane . setTranslateX ( ( scale * ( pane . getWidth ( ) - xMin - xMax ) / 2.0 ) ) ; pane . setTranslateY ( ( scale * ( pane . getHeight ( ) - yMin - yMax ) / 2.0 ) ) ; pane . setScaleX ( scale ) ; pane . setScaleY ( scale ) ; return scale ; }
target:  Computes transforms (translations and scaling) and applies them to the environment state view. Those transforms map logical positions to screen positions in the viewer pane. The purpose is to show the graphical state representation as large as possible.