- /*
- * @(#)JRadioButton.java 1.53 01/11/29
- *
- * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
- * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
- */
- package javax.swing;
-
- import java.awt.*;
- import java.awt.event.*;
-
- import javax.swing.plaf.*;
- import javax.accessibility.*;
-
- import java.io.ObjectOutputStream;
- import java.io.ObjectInputStream;
- import java.io.IOException;
-
-
- /**
- * An implementation of a radio button -- an item that can be selected or
- * deselected, and which displays its state to the user.
- * Used with a {@link ButtonGroup} object to create a group of buttons
- * in which only one button at a time can be selected. (Create a ButtonGroup
- * object and use its <code>add</code> method to include the JRadioButton objects
- * in the group.)
- * <blockquote>
- * Note:<br>
- * The ButtonGroup object is a logical grouping -- not a physical grouping.
- * Tocreate a button panel, you should still create a {@link JPanel} or similar
- * container-object and add a {@link Border} to it to set it off from surrounding
- * components.
- * <blockquote>
- * <p>
- * See <a href="http://java.sun.com/docs/books/tutorial/ui/swing/radiobutton.html">How to Use Radio Buttons</a>
- * in <a href="http://java.sun.com/Series/Tutorial/index.html"><em>The Java Tutorial</em></a>
- * for further documentation.
- * <p>
- * For the keyboard keys used by this component in the standard Look and
- * Feel (L&F) renditions, see the
- * <a href="doc-files/Key-Index.html#JRadioButton">JRadioButton</a> key assignments.
- * <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. A future release of Swing will provide support for
- * long term persistence.
- *
- * @beaninfo
- * attribute: isContainer false
- * @see ButtonGroup
- * @see JCheckBox
- * @version 1.53 11/29/01
- * @author Jeff Dinkins
- */
- public class JRadioButton extends JToggleButton implements Accessible {
-
- /**
- * @see #getUIClassID
- * @see #readObject
- */
- private static final String uiClassID = "RadioButtonUI";
-
-
- /**
- * Creates an initially unselected radio button
- * with no set text.
- */
- public JRadioButton () {
- this(null, null, false);
- }
-
- /**
- * Creates an initially unselected radio button
- * with the specified image but no text.
- *
- * @param icon the image that the button should display
- */
- public JRadioButton(Icon icon) {
- this(null, icon, false);
- }
-
- /**
- * Creates a radio button with the specified image
- * and selection state, but no text.
- *
- * @param icon the image that the button should display
- * @param selected if true, the button is initially selected;
- * otherwise, the button is initially unselected
- */
- public JRadioButton(Icon icon, boolean selected) {
- this(null, icon, selected);
- }
-
- /**
- * Creates an unselected radio button with the specified text.
- *
- * @param text the string displayed on the radio button
- */
- public JRadioButton (String text) {
- this(text, null, false);
- }
-
- /**
- * Creates a radio button with the specified text
- * and selection state.
- *
- * @param text the string displayed on the radio button
- * @param selected if true, the button is initially selected;
- * otherwise, the button is initially unselected
- */
- public JRadioButton (String text, boolean selected) {
- this(text, null, selected);
- }
-
- /**
- * Creates a radio button that has the specified text and image,
- * and that is initially unselected.
- *
- * @param text the string displayed on the radio button
- * @param icon the image that the button should display
- */
- public JRadioButton(String text, Icon icon) {
- this(text, icon, false);
- }
-
- /**
- * Creates a radio button that has the specified text, image,
- * and selection state.
- *
- * @param text the string displayed on the radio button
- * @param icon the image that the button should display
- */
- public JRadioButton (String text, Icon icon, boolean selected) {
- super(text, icon, selected);
- setBorderPainted(false);
- setHorizontalAlignment(LEFT);
- }
-
-
- /**
- * Notification from the UIFactory that the L&F
- * has changed.
- *
- * @see JComponent#updateUI
- */
- public void updateUI() {
- setUI((ButtonUI)UIManager.getUI(this));
- }
-
-
- /**
- * Returns the name of the L&F class
- * that renders this component.
- *
- * @return String "RadioButtonUI"
- * @see JComponent#getUIClassID
- * @see UIDefaults#getUI
- * @beaninfo
- * expert: true
- * description: A string that specifies the name of the L&F class.
- */
- public String getUIClassID() {
- return uiClassID;
- }
-
-
- /**
- * See readObject() and writeObject() in JComponent for more
- * information about serialization in Swing.
- */
- private void writeObject(ObjectOutputStream s) throws IOException {
- s.defaultWriteObject();
- if ((ui != null) && (getUIClassID().equals(uiClassID))) {
- ui.installUI(this);
- }
- }
-
-
- /**
- * Returns a string representation of this JRadioButton. This method
- * is intended to be used only for debugging purposes, and the
- * content and format of the returned string may vary between
- * implementations. The returned string may be empty but may not
- * be <code>null</code>.
- *
- * @return a string representation of this JRadioButton.
- */
- protected String paramString() {
- return super.paramString();
- }
-
-
- /////////////////
- // Accessibility support
- ////////////////
-
-
- /**
- * Get the AccessibleContext associated with this JComponent
- *
- * @return the AccessibleContext of this JComponent
- * @beaninfo
- * expert: true
- * description: The AccessibleContext associated with this Button
- */
- public AccessibleContext getAccessibleContext() {
- if (accessibleContext == null) {
- accessibleContext = new AccessibleJRadioButton();
- }
- return accessibleContext;
- }
-
- /**
- * The class used to obtain the accessible role for this object.
- * <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. A future release of Swing will provide support for
- * long term persistence.
- */
- protected class AccessibleJRadioButton extends AccessibleJToggleButton {
-
- /**
- * Get the role of this object.
- *
- * @return an instance of AccessibleRole describing the role of the object
- * @see AccessibleRole
- */
- public AccessibleRole getAccessibleRole() {
- return AccessibleRole.RADIO_BUTTON;
- }
-
- } // inner class AccessibleJRadioButton
- }
-