modules/javafx.controls/src/main/java/javafx/scene/control/skin/SpinnerSkin.java

*** 264,277 ****
      /** {@inheritDoc} */
      @Override protected void layoutChildren(final double x, final double y,
                                              final double w, final double h) {
  
          final double incrementArrowButtonWidth = incrementArrowButton.snappedLeftInset() +
!                 snapSize(incrementArrow.prefWidth(-1)) + incrementArrowButton.snappedRightInset();
  
          final double decrementArrowButtonWidth = decrementArrowButton.snappedLeftInset() +
!                 snapSize(decrementArrow.prefWidth(-1)) + decrementArrowButton.snappedRightInset();
  
          final double widestArrowButton = Math.max(incrementArrowButtonWidth, decrementArrowButtonWidth);
  
          // we need to decide on our layout approach, and this depends on
          // the presence of style classes in the Spinner styleClass list.
--- 264,277 ----
      /** {@inheritDoc} */
      @Override protected void layoutChildren(final double x, final double y,
                                              final double w, final double h) {
  
          final double incrementArrowButtonWidth = incrementArrowButton.snappedLeftInset() +
!                 snapSizeX(incrementArrow.prefWidth(-1)) + incrementArrowButton.snappedRightInset();
  
          final double decrementArrowButtonWidth = decrementArrowButton.snappedLeftInset() +
!                 snapSizeX(decrementArrow.prefWidth(-1)) + decrementArrowButton.snappedRightInset();
  
          final double widestArrowButton = Math.max(incrementArrowButtonWidth, decrementArrowButtonWidth);
  
          // we need to decide on our layout approach, and this depends on
          // the presence of style classes in the Spinner styleClass list.
*** 307,320 ****
              incrementArrowButton.resize(incrementArrowButtonWidth, h);
              positionInArea(incrementArrowButton, buttonStartX + decrementArrowButtonWidth, y,
                      incrementArrowButtonWidth, h, 0, HPos.CENTER, VPos.CENTER);
          } else if (layoutMode == SPLIT_ARROWS_VERTICAL) {
              final double incrementArrowButtonHeight = incrementArrowButton.snappedTopInset() +
!                     snapSize(incrementArrow.prefHeight(-1)) + incrementArrowButton.snappedBottomInset();
  
              final double decrementArrowButtonHeight = decrementArrowButton.snappedTopInset() +
!                     snapSize(decrementArrow.prefHeight(-1)) + decrementArrowButton.snappedBottomInset();
  
              final double tallestArrowButton = Math.max(incrementArrowButtonHeight, decrementArrowButtonHeight);
  
              // increment is at the top
              incrementArrowButton.resize(w, tallestArrowButton);
--- 307,320 ----
              incrementArrowButton.resize(incrementArrowButtonWidth, h);
              positionInArea(incrementArrowButton, buttonStartX + decrementArrowButtonWidth, y,
                      incrementArrowButtonWidth, h, 0, HPos.CENTER, VPos.CENTER);
          } else if (layoutMode == SPLIT_ARROWS_VERTICAL) {
              final double incrementArrowButtonHeight = incrementArrowButton.snappedTopInset() +
!                     snapSizeY(incrementArrow.prefHeight(-1)) + incrementArrowButton.snappedBottomInset();
  
              final double decrementArrowButtonHeight = decrementArrowButton.snappedTopInset() +
!                     snapSizeY(decrementArrow.prefHeight(-1)) + decrementArrowButton.snappedBottomInset();
  
              final double tallestArrowButton = Math.max(incrementArrowButtonHeight, decrementArrowButtonHeight);
  
              // increment is at the top
              incrementArrowButton.resize(w, tallestArrowButton);