1 /*
   2  * Copyright (c) 2002, 2010, 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 javax.swing.plaf.synth;
  27 
  28 import javax.swing.*;
  29 import javax.swing.border.*;
  30 import javax.swing.plaf.*;
  31 import javax.swing.plaf.basic.*;
  32 import java.awt.*;
  33 import java.beans.PropertyChangeListener;
  34 import java.beans.PropertyChangeEvent;
  35 
  36 /**
  37  * Provides the Synth L&F UI delegate for
  38  * {@link javax.swing.JList}.
  39  *
  40  * @author Scott Violet
  41  * @since 1.7
  42  */
  43 public class SynthListUI extends BasicListUI
  44                          implements PropertyChangeListener, SynthUI {
  45     private SynthStyle style;
  46     private boolean useListColors;
  47     private boolean useUIBorder;
  48 
  49     /**
  50      * Creates a new UI object for the given component.
  51      *
  52      * @param list component to create UI object for
  53      * @return the UI object
  54      */
  55     public static ComponentUI createUI(JComponent list) {
  56         return new SynthListUI();
  57     }
  58 
  59     /**
  60      * Notifies this UI delegate to repaint the specified component.
  61      * This method paints the component background, then calls
  62      * the {@link #paint} method.
  63      *
  64      * <p>In general, this method does not need to be overridden by subclasses.
  65      * All Look and Feel rendering code should reside in the {@code paint} method.
  66      *
  67      * @param g the {@code Graphics} object used for painting
  68      * @param c the component being painted
  69      * @see #paint
  70      */
  71     @Override
  72     public void update(Graphics g, JComponent c) {
  73         SynthContext context = getContext(c);
  74 
  75         SynthLookAndFeel.update(context, g);
  76         context.getPainter().paintListBackground(context,
  77                           g, 0, 0, c.getWidth(), c.getHeight());
  78         context.dispose();
  79         paint(g, c);
  80     }
  81 
  82     /**
  83      * @inheritDoc
  84      */
  85     @Override
  86     public void paintBorder(SynthContext context, Graphics g, int x,
  87                             int y, int w, int h) {
  88         context.getPainter().paintListBorder(context, g, x, y, w, h);
  89     }
  90 
  91     /**
  92      * @inheritDoc
  93      */
  94     @Override
  95     protected void installListeners() {
  96         super.installListeners();
  97         list.addPropertyChangeListener(this);
  98     }
  99 
 100     /**
 101      * @inheritDoc
 102      */
 103     @Override
 104     public void propertyChange(PropertyChangeEvent e) {
 105         if (SynthLookAndFeel.shouldUpdateStyle(e)) {
 106             updateStyle((JList)e.getSource());
 107         }
 108     }
 109 
 110     /**
 111      * @inheritDoc
 112      */
 113     @Override
 114     protected void uninstallListeners() {
 115         super.uninstallListeners();
 116         list.removePropertyChangeListener(this);
 117     }
 118 
 119     /**
 120      * @inheritDoc
 121      */
 122     @Override
 123     protected void installDefaults() {
 124         if (list.getCellRenderer() == null ||
 125                  (list.getCellRenderer() instanceof UIResource)) {
 126             list.setCellRenderer(new SynthListCellRenderer());
 127         }
 128         updateStyle(list);
 129     }
 130 
 131     private void updateStyle(JComponent c) {
 132         SynthContext context = getContext(list, ENABLED);
 133         SynthStyle oldStyle = style;
 134 
 135         style = SynthLookAndFeel.updateStyle(context, this);
 136 
 137         if (style != oldStyle) {
 138             context.setComponentState(SELECTED);
 139             Color sbg = list.getSelectionBackground();
 140             if (sbg == null || sbg instanceof UIResource) {
 141                 list.setSelectionBackground(style.getColor(
 142                                  context, ColorType.TEXT_BACKGROUND));
 143             }
 144 
 145             Color sfg = list.getSelectionForeground();
 146             if (sfg == null || sfg instanceof UIResource) {
 147                 list.setSelectionForeground(style.getColor(
 148                                  context, ColorType.TEXT_FOREGROUND));
 149             }
 150 
 151             useListColors = style.getBoolean(context,
 152                                   "List.rendererUseListColors", true);
 153             useUIBorder = style.getBoolean(context,
 154                                   "List.rendererUseUIBorder", true);
 155 
 156             int height = style.getInt(context, "List.cellHeight", -1);
 157             if (height != -1) {
 158                 list.setFixedCellHeight(height);
 159             }
 160             if (oldStyle != null) {
 161                 uninstallKeyboardActions();
 162                 installKeyboardActions();
 163             }
 164         }
 165         context.dispose();
 166     }
 167 
 168     /**
 169      * @inheritDoc
 170      */
 171     @Override
 172     protected void uninstallDefaults() {
 173         super.uninstallDefaults();
 174 
 175         SynthContext context = getContext(list, ENABLED);
 176 
 177         style.uninstallDefaults(context);
 178         context.dispose();
 179         style = null;
 180     }
 181 
 182     /**
 183      * @inheritDoc
 184      */
 185     @Override
 186     public SynthContext getContext(JComponent c) {
 187         return getContext(c, getComponentState(c));
 188     }
 189 
 190     private SynthContext getContext(JComponent c, int state) {
 191         return SynthContext.getContext(SynthContext.class, c,
 192                     SynthLookAndFeel.getRegion(c), style, state);
 193     }
 194 
 195     private int getComponentState(JComponent c) {
 196         return SynthLookAndFeel.getComponentState(c);
 197     }
 198 
 199 
 200     private class SynthListCellRenderer extends DefaultListCellRenderer.UIResource {
 201         @Override public String getName() {
 202             return "List.cellRenderer";
 203         }
 204 
 205         @Override public void setBorder(Border b) {
 206             if (useUIBorder || b instanceof SynthBorder) {
 207                 super.setBorder(b);
 208             }
 209         }
 210 
 211         @Override public Component getListCellRendererComponent(JList list, Object value,
 212                   int index, boolean isSelected, boolean cellHasFocus) {
 213             if (!useListColors && (isSelected || cellHasFocus)) {
 214                 SynthLookAndFeel.setSelectedUI((SynthLabelUI)SynthLookAndFeel.
 215                              getUIOfType(getUI(), SynthLabelUI.class),
 216                                    isSelected, cellHasFocus, list.isEnabled(), false);
 217             }
 218             else {
 219                 SynthLookAndFeel.resetSelectedUI();
 220             }
 221 
 222             super.getListCellRendererComponent(list, value, index,
 223                                                isSelected, cellHasFocus);
 224             return this;
 225         }
 226 
 227         @Override public void paint(Graphics g) {
 228             super.paint(g);
 229             SynthLookAndFeel.resetSelectedUI();
 230         }
 231     }
 232 }