1 /*
   2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.java.swing.plaf.windows;
  27 
  28 import java.awt.*;
  29 import java.awt.event.*;
  30 
  31 import java.io.*;
  32 import java.util.*;
  33 
  34 import javax.swing.plaf.basic.*;
  35 import javax.swing.*;
  36 import javax.swing.plaf.*;
  37 
  38 import javax.swing.tree.*;
  39 
  40 import static com.sun.java.swing.plaf.windows.TMSchema.*;
  41 import static com.sun.java.swing.plaf.windows.XPStyle.Skin;
  42 
  43 
  44 /**
  45  * A Windows tree.
  46  * <p>
  47  * <strong>Warning:</strong>
  48  * Serialized objects of this class will not be compatible with
  49  * future Swing releases.  The current serialization support is appropriate
  50  * for short term storage or RMI between applications running the same
  51  * version of Swing.  A future release of Swing will provide support for
  52  * long term persistence.
  53  *
  54  * @author Scott Violet
  55  */
  56 public class WindowsTreeUI extends BasicTreeUI {
  57 
  58     public static ComponentUI createUI( JComponent c )
  59       {
  60         return new WindowsTreeUI();
  61       }
  62 
  63 
  64     /**
  65       * Ensures that the rows identified by beginRow through endRow are
  66       * visible.
  67       */
  68     protected void ensureRowsAreVisible(int beginRow, int endRow) {
  69         if(tree != null && beginRow >= 0 && endRow < getRowCount(tree)) {
  70             Rectangle visRect = tree.getVisibleRect();
  71             if(beginRow == endRow) {
  72                 Rectangle     scrollBounds = getPathBounds(tree, getPathForRow
  73                                                            (tree, beginRow));
  74 
  75                 if(scrollBounds != null) {
  76                     scrollBounds.x = visRect.x;
  77                     scrollBounds.width = visRect.width;
  78                     tree.scrollRectToVisible(scrollBounds);
  79                 }
  80             }
  81             else {
  82                 Rectangle   beginRect = getPathBounds(tree, getPathForRow
  83                                                       (tree, beginRow));
  84                 if (beginRect != null) {
  85                     Rectangle   testRect = beginRect;
  86                     int         beginY = beginRect.y;
  87                     int         maxY = beginY + visRect.height;
  88 
  89                     for(int counter = beginRow + 1; counter <= endRow; counter++) {
  90                         testRect = getPathBounds(tree,
  91                                                  getPathForRow(tree, counter));
  92                         if(testRect != null && (testRect.y + testRect.height) > maxY) {
  93                             counter = endRow;
  94                         }
  95                     }
  96 
  97                     if (testRect == null) {
  98                         return;
  99                     }
 100 
 101                     tree.scrollRectToVisible(new Rectangle(visRect.x, beginY, 1,
 102                                                       testRect.y + testRect.height-
 103                                                       beginY));
 104                 }
 105             }
 106         }
 107     }
 108 
 109     static protected final int HALF_SIZE = 4;
 110     static protected final int SIZE = 9;
 111 
 112     /**
 113      * Returns the default cell renderer that is used to do the
 114      * stamping of each node.
 115      */
 116     protected TreeCellRenderer createDefaultCellRenderer() {
 117         return new WindowsTreeCellRenderer();
 118     }
 119 
 120     /**
 121      * The minus sign button icon
 122      * <p>
 123      * <strong>Warning:</strong>
 124      * Serialized objects of this class will not be compatible with
 125      * future Swing releases.  The current serialization support is appropriate
 126      * for short term storage or RMI between applications running the same
 127      * version of Swing.  A future release of Swing will provide support for
 128      * long term persistence.
 129      */
 130     @SuppressWarnings("serial") // Same-version serialization only
 131     public static class ExpandedIcon implements Icon, Serializable {
 132 
 133         static public Icon createExpandedIcon() {
 134             return new ExpandedIcon();
 135         }
 136 
 137         Skin getSkin(Component c) {
 138             XPStyle xp = XPStyle.getXP();
 139             return (xp != null) ? xp.getSkin(c, Part.TVP_GLYPH) : null;
 140         }
 141 
 142         public void paintIcon(Component c, Graphics g, int x, int y) {
 143             Skin skin = getSkin(c);
 144             if (skin != null) {
 145                 skin.paintSkin(g, x, y, State.OPENED);
 146                 return;
 147             }
 148 
 149             Color     backgroundColor = c.getBackground();
 150 
 151             if(backgroundColor != null)
 152                 g.setColor(backgroundColor);
 153             else
 154                 g.setColor(Color.white);
 155             g.fillRect(x, y, SIZE-1, SIZE-1);
 156             g.setColor(Color.gray);
 157             g.drawRect(x, y, SIZE-1, SIZE-1);
 158             g.setColor(Color.black);
 159             g.drawLine(x + 2, y + HALF_SIZE, x + (SIZE - 3), y + HALF_SIZE);
 160         }
 161 
 162         public int getIconWidth() {
 163             Skin skin = getSkin(null);
 164             return (skin != null) ? skin.getWidth() : SIZE;
 165         }
 166 
 167         public int getIconHeight() {
 168             Skin skin = getSkin(null);
 169             return (skin != null) ? skin.getHeight() : SIZE;
 170         }
 171     }
 172 
 173     /**
 174      * The plus sign button icon
 175      * <p>
 176      * <strong>Warning:</strong>
 177      * Serialized objects of this class will not be compatible with
 178      * future Swing releases.  The current serialization support is appropriate
 179      * for short term storage or RMI between applications running the same
 180      * version of Swing.  A future release of Swing will provide support for
 181      * long term persistence.
 182      */
 183     @SuppressWarnings("serial") // Superclass is not serializable across versions
 184     public static class CollapsedIcon extends ExpandedIcon {
 185         static public Icon createCollapsedIcon() {
 186             return new CollapsedIcon();
 187         }
 188 
 189         public void paintIcon(Component c, Graphics g, int x, int y) {
 190             Skin skin = getSkin(c);
 191             if (skin != null) {
 192                 skin.paintSkin(g, x, y, State.CLOSED);
 193             } else {
 194             super.paintIcon(c, g, x, y);
 195             g.drawLine(x + HALF_SIZE, y + 2, x + HALF_SIZE, y + (SIZE - 3));
 196             }
 197         }
 198     }
 199 
 200     @SuppressWarnings("serial") // Superclass is not serializable across versions
 201     public class WindowsTreeCellRenderer extends DefaultTreeCellRenderer {
 202 
 203         /**
 204          * Configures the renderer based on the passed in components.
 205          * The value is set from messaging the tree with
 206          * <code>convertValueToText</code>, which ultimately invokes
 207          * <code>toString</code> on <code>value</code>.
 208          * The foreground color is set based on the selection and the icon
 209          * is set based on on leaf and expanded.
 210          */
 211         public Component getTreeCellRendererComponent(JTree tree, Object value,
 212                                                       boolean sel,
 213                                                       boolean expanded,
 214                                                       boolean leaf, int row,
 215                                                       boolean hasFocus) {
 216             super.getTreeCellRendererComponent(tree, value, sel,
 217                                                expanded, leaf, row,
 218                                                hasFocus);
 219             // Windows displays the open icon when the tree item selected.
 220             if (!tree.isEnabled()) {
 221                 setEnabled(false);
 222                 if (leaf) {
 223                     setDisabledIcon(getLeafIcon());
 224                 } else if (sel) {
 225                     setDisabledIcon(getOpenIcon());
 226                 } else {
 227                     setDisabledIcon(getClosedIcon());
 228                 }
 229             }
 230             else {
 231                 setEnabled(true);
 232                 if (leaf) {
 233                     setIcon(getLeafIcon());
 234                 } else if (sel) {
 235                     setIcon(getOpenIcon());
 236                 } else {
 237                     setIcon(getClosedIcon());
 238                 }
 239             }
 240             return this;
 241         }
 242 
 243     }
 244 
 245 }