| /* |
| * Copyright (c) 1998, 2007, 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 javax.swing; |
| |
| import javax.swing.*; |
| import javax.swing.event.*; |
| import javax.swing.border.*; |
| |
| import java.awt.Component; |
| import java.awt.Color; |
| import java.awt.Rectangle; |
| |
| import java.io.Serializable; |
| import sun.swing.DefaultLookup; |
| |
| |
| /** |
| * Renders an item in a list. |
| * <p> |
| * <strong><a name="override">Implementation Note:</a></strong> |
| * This class overrides |
| * <code>invalidate</code>, |
| * <code>validate</code>, |
| * <code>revalidate</code>, |
| * <code>repaint</code>, |
| * <code>isOpaque</code>, |
| * and |
| * <code>firePropertyChange</code> |
| * solely to improve performance. |
| * If not overridden, these frequently called methods would execute code paths |
| * that are unnecessary for the default list cell renderer. |
| * If you write your own renderer, |
| * take care to weigh the benefits and |
| * drawbacks of overriding these methods. |
| * |
| * <p> |
| * |
| * <strong>Warning:</strong> |
| * Serialized objects of this class will not be compatible with |
| * future Swing releases. The current serialization support is |
| * appropriate for short term storage or RMI between applications running |
| * the same version of Swing. As of 1.4, support for long term storage |
| * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| * has been added to the <code>java.beans</code> package. |
| * Please see {@link java.beans.XMLEncoder}. |
| * |
| * @author Philip Milne |
| * @author Hans Muller |
| */ |
| public class DefaultListCellRenderer extends JLabel |
| implements ListCellRenderer<Object>, Serializable |
| { |
| |
| /** |
| * An empty <code>Border</code>. This field might not be used. To change the |
| * <code>Border</code> used by this renderer override the |
| * <code>getListCellRendererComponent</code> method and set the border |
| * of the returned component directly. |
| */ |
| private static final Border SAFE_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1); |
| private static final Border DEFAULT_NO_FOCUS_BORDER = new EmptyBorder(1, 1, 1, 1); |
| protected static Border noFocusBorder = DEFAULT_NO_FOCUS_BORDER; |
| |
| /** |
| * Constructs a default renderer object for an item |
| * in a list. |
| */ |
| public DefaultListCellRenderer() { |
| super(); |
| setOpaque(true); |
| setBorder(getNoFocusBorder()); |
| setName("List.cellRenderer"); |
| } |
| |
| private Border getNoFocusBorder() { |
| Border border = DefaultLookup.getBorder(this, ui, "List.cellNoFocusBorder"); |
| if (System.getSecurityManager() != null) { |
| if (border != null) return border; |
| return SAFE_NO_FOCUS_BORDER; |
| } else { |
| if (border != null && |
| (noFocusBorder == null || |
| noFocusBorder == DEFAULT_NO_FOCUS_BORDER)) { |
| return border; |
| } |
| return noFocusBorder; |
| } |
| } |
| |
| public Component getListCellRendererComponent( |
| JList<?> list, |
| Object value, |
| int index, |
| boolean isSelected, |
| boolean cellHasFocus) |
| { |
| setComponentOrientation(list.getComponentOrientation()); |
| |
| Color bg = null; |
| Color fg = null; |
| |
| JList.DropLocation dropLocation = list.getDropLocation(); |
| if (dropLocation != null |
| && !dropLocation.isInsert() |
| && dropLocation.getIndex() == index) { |
| |
| bg = DefaultLookup.getColor(this, ui, "List.dropCellBackground"); |
| fg = DefaultLookup.getColor(this, ui, "List.dropCellForeground"); |
| |
| isSelected = true; |
| } |
| |
| if (isSelected) { |
| setBackground(bg == null ? list.getSelectionBackground() : bg); |
| setForeground(fg == null ? list.getSelectionForeground() : fg); |
| } |
| else { |
| setBackground(list.getBackground()); |
| setForeground(list.getForeground()); |
| } |
| |
| if (value instanceof Icon) { |
| setIcon((Icon)value); |
| setText(""); |
| } |
| else { |
| setIcon(null); |
| setText((value == null) ? "" : value.toString()); |
| } |
| |
| setEnabled(list.isEnabled()); |
| setFont(list.getFont()); |
| |
| Border border = null; |
| if (cellHasFocus) { |
| if (isSelected) { |
| border = DefaultLookup.getBorder(this, ui, "List.focusSelectedCellHighlightBorder"); |
| } |
| if (border == null) { |
| border = DefaultLookup.getBorder(this, ui, "List.focusCellHighlightBorder"); |
| } |
| } else { |
| border = getNoFocusBorder(); |
| } |
| setBorder(border); |
| |
| return this; |
| } |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| * |
| * @since 1.5 |
| * @return <code>true</code> if the background is completely opaque |
| * and differs from the JList's background; |
| * <code>false</code> otherwise |
| */ |
| @Override |
| public boolean isOpaque() { |
| Color back = getBackground(); |
| Component p = getParent(); |
| if (p != null) { |
| p = p.getParent(); |
| } |
| // p should now be the JList. |
| boolean colorMatch = (back != null) && (p != null) && |
| back.equals(p.getBackground()) && |
| p.isOpaque(); |
| return !colorMatch && super.isOpaque(); |
| } |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void validate() {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| * |
| * @since 1.5 |
| */ |
| @Override |
| public void invalidate() {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| * |
| * @since 1.5 |
| */ |
| @Override |
| public void repaint() {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void revalidate() {} |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void repaint(long tm, int x, int y, int width, int height) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void repaint(Rectangle r) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) { |
| // Strings get interned... |
| if (propertyName == "text" |
| || ((propertyName == "font" || propertyName == "foreground") |
| && oldValue != newValue |
| && getClientProperty(javax.swing.plaf.basic.BasicHTML.propertyKey) != null)) { |
| |
| super.firePropertyChange(propertyName, oldValue, newValue); |
| } |
| } |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, byte oldValue, byte newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, char oldValue, char newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, short oldValue, short newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, int oldValue, int newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, long oldValue, long newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, float oldValue, float newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, double oldValue, double newValue) {} |
| |
| /** |
| * Overridden for performance reasons. |
| * See the <a href="#override">Implementation Note</a> |
| * for more information. |
| */ |
| @Override |
| public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) {} |
| |
| /** |
| * A subclass of DefaultListCellRenderer that implements UIResource. |
| * DefaultListCellRenderer doesn't implement UIResource |
| * directly so that applications can safely override the |
| * cellRenderer property with DefaultListCellRenderer subclasses. |
| * <p> |
| * <strong>Warning:</strong> |
| * Serialized objects of this class will not be compatible with |
| * future Swing releases. The current serialization support is |
| * appropriate for short term storage or RMI between applications running |
| * the same version of Swing. As of 1.4, support for long term storage |
| * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| * has been added to the <code>java.beans</code> package. |
| * Please see {@link java.beans.XMLEncoder}. |
| */ |
| public static class UIResource extends DefaultListCellRenderer |
| implements javax.swing.plaf.UIResource |
| { |
| } |
| } |
