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JRadioButtonMenuItem.java
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1998-06-30
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/*
* @(#)JRadioButtonMenuItem.java 1.19 98/02/27
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing;
import java.util.EventListener;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import com.sun.java.swing.plaf.*;
import com.sun.java.accessibility.*;
/**
* An implementation of a RadioButtonMenuItem. A RadioButtonMenuItem is
* a menu item that is part of a group of menu items in which only one
* item in the group can be selected. The selected item displays its
* selected state. Selecting it causes any other selected item to
* switch to the unselected state.
* Used with a ButtonGroup object to create a group of menu items
* in which only one item at a time can be selected. (Create a ButtonGroup
* object and use its <code>add</code> method to include the JRadioButtonMenuItem
* objects in the group.)
* <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#JRadioButtonMenuItem">JRadioButtonMenuItem</a> key assignments.
* <p>
* Warning: 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 Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*
* @beaninfo
* attribute: isContainer false
*
* @version 1.19 02/27/98
* @author Georges Saab
* @author David Karlton
* @see ButtonGroup
*/
public class JRadioButtonMenuItem extends JMenuItem implements Accessible {
/**
* Creates a JRadioButtonMenuItem with no set text or icon.
*/
public JRadioButtonMenuItem() {
this(null, null);
}
/**
* Creates a JRadioButtonMenuItem with an icon.
*
* @param icon the Icon to display on the RadioButtonMenuItem.
*/
public JRadioButtonMenuItem(Icon icon) {
this(null, icon);
}
/**
* Creates a JRadioButtonMenuItem with text.
*
* @param text the text of the RadioButtonMenuItem.
*/
public JRadioButtonMenuItem(String text) {
this(text, null);
}
/**
* Creates a JRadioButtonMenuItem with the specified text
* and Icon.
*
* @param text the text of the RadioButtonMenuItem
* @param icon the icon to display on the RadioButtonMenuItem
*/
public JRadioButtonMenuItem(String text, Icon icon) {
setModel(new JToggleButton.ToggleButtonModel());
init(text, icon);
setBorderPainted(false);
setFocusPainted(false);
setHorizontalTextPosition(JButton.RIGHT);
setHorizontalAlignment(JButton.LEFT);
// setArmedPainted(false);
updateUI();
}
/**
* Initialize the JRadioButtonMenuItem with the specified text
* and Icon.
*
* @param text the text to display
* @param icon the icon to display
*/
protected void init(String text, Icon icon) {
setLayout(new OverlayLayout(this));
if(text != null) {
setText(text);
if(icon != null) {
setVerticalTextPosition(BOTTOM);
}
}
if(icon != null) {
setIcon(icon);
}
// Listen for Focus events
addFocusListener(
new FocusListener() {
public void focusGained(FocusEvent event) {}
public void focusLost(FocusEvent event) {
// When focus is lost, repaint if
// we focus information is painted
if(isFocusPainted()) {
repaint();
}
}
}
);
}
/**
* Sets the L&F object that renders this component.
*
* @param ui the RadioButtonMenuItemUI L&F object
* @see UIDefaults#getUI
* @beaninfo
* description: The menu item's UI delegate
* bound: true
* expert: true
* hidden: true
*/
public void setUI(RadioButtonMenuItemUI ui) {
super.setUI(ui);
}
/**
* Notification from the UIFactory that the L&F has changed.
* Called to replace the UI with the latest version from the
* UIFactory.
*
* @see JComponent#updateUI
*/
public void updateUI() {
setUI((RadioButtonMenuItemUI)UIManager.getUI(this));
}
/**
* Returns the name of the L&F class that renders this component.
*
* @return "RadioButtonMenuItemUI"
* @see JComponent#getUIClassID
* @see UIDefaults#getUI
*/
public String getUIClassID() {
return "RadioButtonMenuItemUI";
}
/*
* Override Component.requestFocus() to not grab focus.
*/
public void requestFocus() {}
/////////////////
// Accessibility support
////////////////
/**
* Get the AccessibleContext associated with this JComponent
*
* @return the AccessibleContext of this JComponent
*/
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null) {
accessibleContext = new AccessibleJRadioButtonMenuItem();
}
return accessibleContext;
}
/**
* The class used to obtain the accessible role for this object.
* <p>
* Warning: 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 Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*/
protected class AccessibleJRadioButtonMenuItem extends AccessibleJMenuItem {
/**
* Get the role of this object.
*
* @return an instance of AccessibleRole describing the role of the
* object
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.RADIO_BUTTON;
}
} // inner class AccessibleJRadioButtonMenuItem
}