/*
* Copyright (c) 1997, 2008, 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
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*/
package javax.swing.plaf.basic;
import javax.swing.ComboBoxEditor;
import javax.swing.JTextField;
import javax.swing.border.Border;
import java.awt.Component;
import java.awt.event.*;
import java.lang.reflect.Method;
/**
* The default editor for editable combo boxes. The editor is implemented as a JTextField.
*
* @author Arnaud Weber
* @author Mark Davidson
*/
public class BasicComboBoxEditor implements ComboBoxEditor,FocusListener {
protected JTextField editor;
private Object oldValue;
public BasicComboBoxEditor() {
editor = createEditorComponent();
}
public Component getEditorComponent() {
return editor;
}
/**
* Creates the internal editor component. Override this to provide
* a custom implementation.
*
* @return a new editor component
* @since 1.6
*/
protected JTextField createEditorComponent() {
JTextField editor = new BorderlessTextField("",9);
editor.setBorder(null);
return editor;
}
/**
* Sets the item that should be edited.
*
* @param anObject the displayed value of the editor
*/
public void setItem(Object anObject) {
String text;
if ( anObject != null ) {
text = anObject.toString();
oldValue = anObject;
} else {
text = "";
}
// workaround for 4530952
if (! text.equals(editor.getText())) {
editor.setText(text);
}
}
public Object getItem() {
Object newValue = editor.getText();
if (oldValue != null && !(oldValue instanceof String)) {
// The original value is not a string. Should return the value in it's
// original type.
if (newValue.equals(oldValue.toString())) {
return oldValue;
} else {
// Must take the value from the editor and get the value and cast it to the new type.
Class<?> cls = oldValue.getClass();
try {
Method method = cls.getMethod("valueOf", new Class[]{String.class});
newValue = method.invoke(oldValue, new Object[] { editor.getText()});
} catch (Exception ex) {
// Fail silently and return the newValue (a String object)
}
}
}
return newValue;
}
public void selectAll() {
editor.selectAll();
editor.requestFocus();
}
// This used to do something but now it doesn't. It couldn't be
// removed because it would be an API change to do so.
public void focusGained(FocusEvent e) {}
// This used to do something but now it doesn't. It couldn't be
// removed because it would be an API change to do so.
public void focusLost(FocusEvent e) {}
public void addActionListener(ActionListener l) {
editor.addActionListener(l);
}
public void removeActionListener(ActionListener l) {
editor.removeActionListener(l);
}
static class BorderlessTextField extends JTextField {
public BorderlessTextField(String value,int n) {
super(value,n);
}
// workaround for 4530952
public void setText(String s) {
if (getText().equals(s)) {
return;
}
super.setText(s);
}
public void setBorder(Border b) {
if (!(b instanceof UIResource)) {
super.setBorder(b);
}
}
}
/**
* A subclass of BasicComboBoxEditor that implements UIResource.
* BasicComboBoxEditor doesn't implement UIResource
* directly so that applications can safely override the
* cellRenderer property with BasicListCellRenderer 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 BasicComboBoxEditor
implements javax.swing.plaf.UIResource {
}
}