src/java.desktop/macosx/classes/com/apple/laf/AquaSplitPaneDividerUI.java - platform/libcore - Git at Google

 /*
  * Copyright (c) 2011, 2014, 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;

 @SuppressWarnings("serial") // Superclass is not serializable across versions
 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;

             final Graphics2D g2d = (Graphics2D)g;
             final Color oldColor = g2d.getColor();

             g2d.setPaint(new GradientPaint(0, 0, startColor, 0, height, endColor));
             g2d.fillRect(x, y, width, height);
             g2d.setColor(borderLines);
             g2d.drawLine(x, y, x + width, y);
             g2d.drawLine(x, y + height - 1, x + width, y + height - 1);

             g2d.setColor(oldColor);
         }
     }
 }
	/*
	* Copyright (c) 2011, 2014, 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;

	@SuppressWarnings("serial") // Superclass is not serializable across versions
	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;

	final Graphics2D g2d = (Graphics2D)g;
	final Color oldColor = g2d.getColor();

	g2d.setPaint(new GradientPaint(0, 0, startColor, 0, height, endColor));
	g2d.fillRect(x, y, width, height);
	g2d.setColor(borderLines);
	g2d.drawLine(x, y, x + width, y);
	g2d.drawLine(x, y + height - 1, x + width, y + height - 1);

	g2d.setColor(oldColor);
	}
	}
	}