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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, 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 | package javax.swing.plaf.basic; | ||
| 26 | |||
| 27 | import javax.swing.ComboBoxEditor; | ||
| 28 | import javax.swing.JTextField; | ||
| 29 | import javax.swing.border.Border; | ||
| 30 | import java.awt.Component; | ||
| 31 | import java.awt.event.*; | ||
| 32 | |||
| 33 | import java.lang.reflect.Method; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * The default editor for editable combo boxes. The editor is implemented as a JTextField. | ||
| 37 | * | ||
| 38 | * @author Arnaud Weber | ||
| 39 | * @author Mark Davidson | ||
| 40 | */ | ||
| 41 | public class BasicComboBoxEditor implements ComboBoxEditor,FocusListener { | ||
| 42 | protected JTextField editor; | ||
| 43 | private Object oldValue; | ||
| 44 | |||
| 45 | public BasicComboBoxEditor() { | ||
| 46 | editor = createEditorComponent(); | ||
| 47 | } | ||
| 48 | |||
| 49 | public Component getEditorComponent() { | ||
| 50 | return editor; | ||
| 51 | } | ||
| 52 | |||
| 53 | /** | ||
| 54 | * Creates the internal editor component. Override this to provide | ||
| 55 | * a custom implementation. | ||
| 56 | * | ||
| 57 | * @return a new editor component | ||
| 58 | * @since 1.6 | ||
| 59 | */ | ||
| 60 | protected JTextField createEditorComponent() { | ||
| 61 | JTextField editor = new BorderlessTextField("",9); | ||
| 62 | editor.setBorder(null); | ||
| 63 | return editor; | ||
| 64 | } | ||
| 65 | |||
| 66 | /** | ||
| 67 | * Sets the item that should be edited. | ||
| 68 | * | ||
| 69 | * @param anObject the displayed value of the editor | ||
| 70 | */ | ||
| 71 | public void setItem(Object anObject) { | ||
| 72 | String text; | ||
| 73 | |||
| 74 | if ( anObject != null ) { | ||
| 75 | text = anObject.toString(); | ||
| 76 | oldValue = anObject; | ||
| 77 | } else { | ||
| 78 | text = ""; | ||
| 79 | } | ||
| 80 | // workaround for 4530952 | ||
| 81 | if (! text.equals(editor.getText())) { | ||
| 82 | editor.setText(text); | ||
| 83 | } | ||
| 84 | } | ||
| 85 | |||
| 86 | public Object getItem() { | ||
| 87 | Object newValue = editor.getText(); | ||
| 88 | |||
| 89 | if (oldValue != null && !(oldValue instanceof String)) { | ||
| 90 | // The original value is not a string. Should return the value in it's | ||
| 91 | // original type. | ||
| 92 | if (newValue.equals(oldValue.toString())) { | ||
| 93 | return oldValue; | ||
| 94 | } else { | ||
| 95 | // Must take the value from the editor and get the value and cast it to the new type. | ||
| 96 | Class<?> cls = oldValue.getClass(); | ||
| 97 | try { | ||
| 98 | Method method = cls.getMethod("valueOf", new Class[]{String.class}); | ||
| 99 | newValue = method.invoke(oldValue, new Object[] { editor.getText()}); | ||
| 100 | } catch (Exception ex) { | ||
| 101 | // Fail silently and return the newValue (a String object) | ||
| 102 | } | ||
| 103 | } | ||
| 104 | } | ||
| 105 | return newValue; | ||
| 106 | } | ||
| 107 | |||
| 108 | public void selectAll() { | ||
| 109 | editor.selectAll(); | ||
| 110 | editor.requestFocus(); | ||
| 111 | } | ||
| 112 | |||
| 113 | // This used to do something but now it doesn't. It couldn't be | ||
| 114 | // removed because it would be an API change to do so. | ||
| 115 | public void focusGained(FocusEvent e) {} | ||
| 116 | |||
| 117 | // This used to do something but now it doesn't. It couldn't be | ||
| 118 | // removed because it would be an API change to do so. | ||
| 119 | public void focusLost(FocusEvent e) {} | ||
| 120 | |||
| 121 | public void addActionListener(ActionListener l) { | ||
| 122 | editor.addActionListener(l); | ||
| 123 | } | ||
| 124 | |||
| 125 | public void removeActionListener(ActionListener l) { | ||
| 126 | editor.removeActionListener(l); | ||
| 127 | } | ||
| 128 | |||
| 129 | static class BorderlessTextField extends JTextField { | ||
| 130 | public BorderlessTextField(String value,int n) { | ||
| 131 | super(value,n); | ||
| 132 | } | ||
| 133 | |||
| 134 | // workaround for 4530952 | ||
| 135 | public void setText(String s) { | ||
| 136 | if (getText().equals(s)) { | ||
| 137 | return; | ||
| 138 | } | ||
| 139 | super.setText(s); | ||
| 140 | } | ||
| 141 | |||
| 142 | public void setBorder(Border b) { | ||
| 143 | if (!(b instanceof UIResource)) { | ||
| 144 | super.setBorder(b); | ||
| 145 | } | ||
| 146 | } | ||
| 147 | } | ||
| 148 | |||
| 149 | /** | ||
| 150 | * A subclass of BasicComboBoxEditor that implements UIResource. | ||
| 151 | * BasicComboBoxEditor doesn't implement UIResource | ||
| 152 | * directly so that applications can safely override the | ||
| 153 | * cellRenderer property with BasicListCellRenderer subclasses. | ||
| 154 | * <p> | ||
| 155 | * <strong>Warning:</strong> | ||
| 156 | * Serialized objects of this class will not be compatible with | ||
| 157 | * future Swing releases. The current serialization support is | ||
| 158 | * appropriate for short term storage or RMI between applications running | ||
| 159 | * the same version of Swing. As of 1.4, support for long term storage | ||
| 160 | * of all JavaBeans<sup><font size="-2">TM</font></sup> | ||
| 161 | * has been added to the <code>java.beans</code> package. | ||
| 162 | * Please see {@link java.beans.XMLEncoder}. | ||
| 163 | */ | ||
| 164 | public static class UIResource extends BasicComboBoxEditor | ||
| 165 | implements javax.swing.plaf.UIResource { | ||
| 166 | } | ||
| 167 | } | ||