J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | package javax.swing.plaf.basic; |
| 26 | |
| 27 | import javax.swing.*; |
| 28 | import javax.swing.border.Border; |
| 29 | |
| 30 | import javax.swing.text.AttributeSet; |
| 31 | import javax.swing.text.BadLocationException; |
| 32 | import javax.swing.text.PlainDocument; |
| 33 | |
| 34 | import java.awt.*; |
| 35 | import java.awt.event.*; |
| 36 | |
| 37 | import java.lang.reflect.Method; |
| 38 | |
| 39 | /** |
| 40 | * The default editor for editable combo boxes. The editor is implemented as a JTextField. |
| 41 | * |
| 42 | * @author Arnaud Weber |
| 43 | * @author Mark Davidson |
| 44 | */ |
| 45 | public class BasicComboBoxEditor implements ComboBoxEditor,FocusListener { |
| 46 | protected JTextField editor; |
| 47 | private Object oldValue; |
| 48 | |
| 49 | public BasicComboBoxEditor() { |
| 50 | editor = createEditorComponent(); |
| 51 | } |
| 52 | |
| 53 | public Component getEditorComponent() { |
| 54 | return editor; |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Creates the internal editor component. Override this to provide |
| 59 | * a custom implementation. |
| 60 | * |
| 61 | * @return a new editor component |
| 62 | * @since 1.6 |
| 63 | */ |
| 64 | protected JTextField createEditorComponent() { |
| 65 | JTextField editor = new BorderlessTextField("",9); |
| 66 | editor.setBorder(null); |
| 67 | return editor; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Sets the item that should be edited. |
| 72 | * |
| 73 | * @param anObject the displayed value of the editor |
| 74 | */ |
| 75 | public void setItem(Object anObject) { |
| 76 | if ( anObject != null ) { |
| 77 | editor.setText(anObject.toString()); |
| 78 | |
| 79 | oldValue = anObject; |
| 80 | } else { |
| 81 | editor.setText(""); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | public Object getItem() { |
| 86 | Object newValue = editor.getText(); |
| 87 | |
| 88 | if (oldValue != null && !(oldValue instanceof String)) { |
| 89 | // The original value is not a string. Should return the value in it's |
| 90 | // original type. |
| 91 | if (newValue.equals(oldValue.toString())) { |
| 92 | return oldValue; |
| 93 | } else { |
| 94 | // Must take the value from the editor and get the value and cast it to the new type. |
| 95 | Class cls = oldValue.getClass(); |
| 96 | try { |
| 97 | Method method = cls.getMethod("valueOf", new Class[]{String.class}); |
| 98 | newValue = method.invoke(oldValue, new Object[] { editor.getText()}); |
| 99 | } catch (Exception ex) { |
| 100 | // Fail silently and return the newValue (a String object) |
| 101 | } |
| 102 | } |
| 103 | } |
| 104 | return newValue; |
| 105 | } |
| 106 | |
| 107 | public void selectAll() { |
| 108 | editor.selectAll(); |
| 109 | editor.requestFocus(); |
| 110 | } |
| 111 | |
| 112 | // This used to do something but now it doesn't. It couldn't be |
| 113 | // removed because it would be an API change to do so. |
| 114 | public void focusGained(FocusEvent e) {} |
| 115 | |
| 116 | // This used to do something but now it doesn't. It couldn't be |
| 117 | // removed because it would be an API change to do so. |
| 118 | public void focusLost(FocusEvent e) {} |
| 119 | |
| 120 | public void addActionListener(ActionListener l) { |
| 121 | editor.addActionListener(l); |
| 122 | } |
| 123 | |
| 124 | public void removeActionListener(ActionListener l) { |
| 125 | editor.removeActionListener(l); |
| 126 | } |
| 127 | |
| 128 | static class BorderlessTextField extends JTextField { |
| 129 | public BorderlessTextField(String value,int n) { |
| 130 | super(value,n); |
| 131 | } |
| 132 | |
| 133 | // workaround for 4530952 |
| 134 | public void setText(String s) { |
| 135 | if (getText().equals(s)) { |
| 136 | return; |
| 137 | } |
| 138 | super.setText(s); |
| 139 | } |
| 140 | |
| 141 | public void setBorder(Border b) { |
| 142 | if (!(b instanceof UIResource)) { |
| 143 | super.setBorder(b); |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * A subclass of BasicComboBoxEditor that implements UIResource. |
| 150 | * BasicComboBoxEditor doesn't implement UIResource |
| 151 | * directly so that applications can safely override the |
| 152 | * cellRenderer property with BasicListCellRenderer subclasses. |
| 153 | * <p> |
| 154 | * <strong>Warning:</strong> |
| 155 | * Serialized objects of this class will not be compatible with |
| 156 | * future Swing releases. The current serialization support is |
| 157 | * appropriate for short term storage or RMI between applications running |
| 158 | * the same version of Swing. As of 1.4, support for long term storage |
| 159 | * of all JavaBeans<sup><font size="-2">TM</font></sup> |
| 160 | * has been added to the <code>java.beans</code> package. |
| 161 | * Please see {@link java.beans.XMLEncoder}. |
| 162 | */ |
| 163 | public static class UIResource extends BasicComboBoxEditor |
| 164 | implements javax.swing.plaf.UIResource { |
| 165 | } |
| 166 | } |