gt:             final Graphics2D g2d = (Graphics2D)g;
context: /*
   * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package com.apple.laf;
  
  import java.awt.*;
  import java.beans.PropertyChangeEvent;
  
  import javax.swing.*;
  import javax.swing.border.Border;
  import javax.swing.plaf.basic.BasicSplitPaneDivider;
  
  import apple.laf.*;
  import apple.laf.JRSUIConstants.State;
  
  import com.apple.laf.AquaUtils.LazyKeyedSingleton;
  import com.apple.laf.AquaUtils.RecyclableSingleton;
  import com.apple.laf.AquaUtils.RecyclableSingletonFromDefaultConstructor;
  
  public class AquaSplitPaneDividerUI extends BasicSplitPaneDivider {
      final AquaPainter<JRSUIState> painter = AquaPainter.create(JRSUIStateFactory.getSplitPaneDivider());
      
      public AquaSplitPaneDividerUI(final AquaSplitPaneUI ui) {
          super(ui);
          setLayout(new AquaSplitPaneDividerUI.DividerLayout());
      }
  
      /**
       * Property change event, presumably from the JSplitPane, will message
       * updateOrientation if necessary.
       */
      public void propertyChange(final PropertyChangeEvent e) {
          if (e.getSource() == splitPane) {
              final String propName = e.getPropertyName();
              if ("enabled".equals(propName)) {
                  final boolean enabled = splitPane.isEnabled();
                  if (leftButton != null) leftButton.setEnabled(enabled);
                  if (rightButton != null) rightButton.setEnabled(enabled);
              } else if (JSplitPane.ORIENTATION_PROPERTY.equals(propName)) {
                  // need to regenerate the buttons, since we bake the orientation into them
                  if (rightButton  != null) {
                      remove(rightButton); rightButton = null;
                  }
                  if (leftButton != null) {
                      remove(leftButton); leftButton = null;
                  }
                  oneTouchExpandableChanged();
              }        
          }
          super.propertyChange(e);
      }
  
      public int getMaxDividerSize() {
          return 10;
      }
  
      /**
       * Paints the divider.
       */
      public void paint(final Graphics g) {
          final Dimension size = getSize();
          int x = 0;
          int y = 0;
          
          final boolean horizontal = splitPane.getOrientation() == SwingConstants.HORIZONTAL;
          //System.err.println("Size = " + size + " orientation horiz = " + horizontal);
          // size determines orientation
          final int maxSize = getMaxDividerSize();
          boolean doPaint = true;
          if (horizontal) {
              if (size.height > maxSize) {
                  final int diff = size.height - maxSize;
                  y = diff / 2;
                  size.height = maxSize;
              }
              if (size.height < 4) doPaint = false;
          } else {
              if (size.width > maxSize) {
                  final int diff = size.width - maxSize;
                  x = diff / 2;
                  size.width = maxSize;
              }
              if (size.width < 4) doPaint = false;
          }
          
          if (doPaint) {
              painter.state.set(getState());
              painter.paint(g, splitPane, x, y, size.width, size.height);
          }
  
          super.paint(g); // Ends up at Container.paint, which paints our JButton children
      }
  
      protected State getState() {
          return splitPane.isEnabled() ? State.ACTIVE : State.DISABLED;
      }
      
      protected JButton createLeftOneTouchButton() {
          return createButtonForDirection(getDirection(true));
      }
      
      protected JButton createRightOneTouchButton() {
          return createButtonForDirection(getDirection(false));
      }
      
      static final LazyKeyedSingleton<Integer, Image> directionArrows = new LazyKeyedSingleton<Integer, Image>() {
          protected Image getInstance(final Integer direction) {
              final Image arrowImage = AquaImageFactory.getArrowImageForDirection(direction);
              final int h = (arrowImage.getHeight(null) * 5) / 7;
              final int w = (arrowImage.getWidth(null) * 5) / 7;
              return AquaUtils.generateLightenedImage(arrowImage.getScaledInstance(w, h, Image.SCALE_SMOOTH), 50);
          }
      };
      
      // separate static, because the divider needs to be serializable
      // see <rdar://problem/7590946> JSplitPane is not serializable when using Aqua look and feel
      static JButton createButtonForDirection(final int direction) {
          final JButton button = new JButton(new ImageIcon(directionArrows.get(Integer.valueOf(direction))));
          button.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
          button.setFocusPainted(false);
          button.setRequestFocusEnabled(false);
          button.setFocusable(false);
          button.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
          return button;
      }
      
      int getDirection(final boolean isLeft) {
          if (splitPane.getOrientation() == JSplitPane.HORIZONTAL_SPLIT) {
              return isLeft ? SwingConstants.WEST : SwingConstants.EAST;
          }
          
          return isLeft ? SwingConstants.NORTH : SwingConstants.SOUTH;
      }
      
      static final int kMaxPopupArrowSize = 9;
      protected class DividerLayout extends BasicSplitPaneDivider.DividerLayout {
          public void layoutContainer(final Container c) {
              final int maxSize = getMaxDividerSize();
              final Dimension size = getSize();
  
              if (leftButton == null || rightButton == null || c != AquaSplitPaneDividerUI.this) return;
              
              if (!splitPane.isOneTouchExpandable()) {
                  leftButton.setBounds(-5, -5, 1, 1);
                  rightButton.setBounds(-5, -5, 1, 1);
                  return;
              }
              
              final int blockSize = Math.min(getDividerSize(), kMaxPopupArrowSize); // make it 1 less than divider, or kMaxPopupArrowSize
  
              // put them at the right or the bottom        
              if (orientation == JSplitPane.VERTICAL_SPLIT) {
                  int yPosition = 0;
                  if (size.height > maxSize) {
                      final int diff = size.height - maxSize;
                      yPosition = diff / 2;
                  }
                  int xPosition = kMaxPopupArrowSize + ONE_TOUCH_OFFSET;
  
                  rightButton.setBounds(xPosition, yPosition, kMaxPopupArrowSize, blockSize);
  
                  xPosition -= (kMaxPopupArrowSize + ONE_TOUCH_OFFSET);
                  leftButton.setBounds(xPosition, yPosition, kMaxPopupArrowSize, blockSize);
              } else {
                  int xPosition = 0;
                  if (size.width > maxSize) {
                      final int diff = size.width - maxSize;
                      xPosition = diff / 2;
                  }
                  int yPosition = kMaxPopupArrowSize + ONE_TOUCH_OFFSET;
  
                  rightButton.setBounds(xPosition, yPosition, blockSize, kMaxPopupArrowSize);
  
                  yPosition -= (kMaxPopupArrowSize + ONE_TOUCH_OFFSET);
                  leftButton.setBounds(xPosition, yPosition, blockSize, kMaxPopupArrowSize);
              }
          }
      }
      
      public static Border getHorizontalSplitDividerGradientVariant() {
          return HorizontalSplitDividerGradientPainter.instance();
      }
      
      static class HorizontalSplitDividerGradientPainter implements Border {
          private static final RecyclableSingleton<HorizontalSplitDividerGradientPainter> instance = new RecyclableSingletonFromDefaultConstructor<HorizontalSplitDividerGradientPainter>(HorizontalSplitDividerGradientPainter.class);
          static HorizontalSplitDividerGradientPainter instance() {
              return instance.get();
          }
          
          final Color startColor = Color.white;
          final Color endColor = new Color(217, 217, 217);
          final Color borderLines = Color.lightGray;
          
          public Insets getBorderInsets(final Component c) {
              return new Insets(0, 0, 0, 0);
          }
  
          public boolean isBorderOpaque() {
              return true;
          }
  
          public void paintBorder(final Component c, final Graphics g, final int x, final int y, final int width, final int height) {
              if (!(g instanceof Graphics2D)) return;
              
  