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

@@ -230,11 +230,11 @@
     /** {@inheritDoc} */
     @Override protected void layoutChildren(final double x, double y,
                                             final double w, final double h) {
 
         // header
-        double headerHeight = snapSize(titleRegion.prefHeight(-1));
+        double headerHeight = snapSizeY(titleRegion.prefHeight(-1));
 
         titleRegion.resize(w, headerHeight);
         positionInArea(titleRegion, x, y,
                 w, headerHeight, 0, HPos.LEFT, VPos.CENTER);
         titleRegion.requestLayout();

@@ -244,45 +244,47 @@
         if (isInsideAccordion()) {
             if (prefHeightFromAccordion != 0) {
                 contentHeight = (prefHeightFromAccordion - headerHeight) * getTransition();
             }
         }
-        contentHeight = snapSize(contentHeight);
+        contentHeight = snapSizeY(contentHeight);
 
-        y += snapSize(headerHeight);
+        // Header height was already snapped above.  Is this just in case
+        // mods are made to the intervening code?  Or is it just redundant?
+        y += snapSizeY(headerHeight);
         contentContainer.resize(w, contentHeight);
         clipRect.setHeight(contentHeight);
         positionInArea(contentContainer, x, y,
                 w, contentHeight, /*baseline ignored*/0, HPos.CENTER, VPos.CENTER);
     }
 
     /** {@inheritDoc} */
     @Override protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
-        double titleWidth = snapSize(titleRegion.prefWidth(height));
-        double contentWidth = snapSize(contentContainer.minWidth(height));
+        double titleWidth = snapSizeX(titleRegion.prefWidth(height));
+        double contentWidth = snapSizeX(contentContainer.minWidth(height));
         return Math.max(titleWidth, contentWidth) + leftInset + rightInset;
     }
 
     /** {@inheritDoc} */
     @Override protected double computeMinHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
-        double headerHeight = snapSize(titleRegion.prefHeight(width));
+        double headerHeight = snapSizeY(titleRegion.prefHeight(width));
         double contentHeight = contentContainer.minHeight(width) * getTransition();
-        return headerHeight + snapSize(contentHeight) + topInset + bottomInset;
+        return headerHeight + snapSizeY(contentHeight) + topInset + bottomInset;
     }
 
     /** {@inheritDoc} */
     @Override protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
-        double titleWidth = snapSize(titleRegion.prefWidth(height));
-        double contentWidth = snapSize(contentContainer.prefWidth(height));
+        double titleWidth = snapSizeX(titleRegion.prefWidth(height));
+        double contentWidth = snapSizeX(contentContainer.prefWidth(height));
         return Math.max(titleWidth, contentWidth) + leftInset + rightInset;
     }
 
     /** {@inheritDoc} */
     @Override protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) {
-        double headerHeight = snapSize(titleRegion.prefHeight(width));
+        double headerHeight = snapSizeY(titleRegion.prefHeight(width));
         double contentHeight = contentContainer.prefHeight(width) * getTransition();
-        return headerHeight + snapSize(contentHeight) + topInset + bottomInset;
+        return headerHeight + snapSizeY(contentHeight) + topInset + bottomInset;
     }
 
     /** {@inheritDoc} */
     @Override protected double computeMaxWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) {
         return Double.MAX_VALUE;

@@ -327,22 +329,22 @@
     private boolean isInsideAccordion() {
         return getSkinnable().getParent() != null && getSkinnable().getParent() instanceof Accordion;
     }
 
     double getTitleRegionSize(double width) {
-        return snapSize(titleRegion.prefHeight(width)) + snappedTopInset() + snappedBottomInset();
+        return snapSizeY(titleRegion.prefHeight(width)) + snappedTopInset() + snappedBottomInset();
     }
 
     private double prefHeightFromAccordion = 0;
     void setMaxTitledPaneHeightForAccordion(double height) {
         this.prefHeightFromAccordion = height;
     }
 
     double getTitledPaneHeightForAccordion() {
-        double headerHeight = snapSize(titleRegion.prefHeight(-1));
+        double headerHeight = snapSizeY(titleRegion.prefHeight(-1));
         double contentHeight = (prefHeightFromAccordion - headerHeight) * getTransition();
-        return headerHeight + snapSize(contentHeight) + snappedTopInset() + snappedBottomInset();
+        return headerHeight + snapSizeY(contentHeight) + snappedTopInset() + snappedBottomInset();
     }
 
     private void doAnimationTransition() {
         if (content == null) {
             return;