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JCheckBoxMenuItem.java
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1998-06-30
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/*
* @(#)JCheckBoxMenuItem.java 1.27 98/03/30
*
* 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.*;
/**
* A menu item that can be selected or deselected. If selected, the menu
* item typically appears with a checkmark next to it. If unselected or
* deselected, the menu item appears without a checkmark. Like a regular
* menu item, a checkbox menu item can have either text or a graphic
* icon associated with it, or both.
* <p>
* Either <code>isSelected</code>/<code>setSelected</code> or
* <code>getState</code>/<code>setState</code> can be used
* to determine/specify the menu item's selection state. (The
* Swing-standard methods are <code>isSelected</code> and
* <code>setSelected</code>. These methods work for all menus and buttons.
* The <code>getState</code> and <code>setState</code> methods exist for
* compatibility with other component sets.)
* <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#JCheckBoxMenuItem">JCheckBoxMenuItem</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 1.27 03/30/98
* @author Georges Saab
* @author David Karlton
*/
public class JCheckBoxMenuItem extends JMenuItem implements SwingConstants,
Accessible {
/**
* Creates an initially unselected checkboxMenuItem with no set text or icon.
*/
public JCheckBoxMenuItem() {
this(null, null);
}
/**
* Creates an initially unselected checkboxMenuItem with an icon.
*
* @param icon the icon of the CheckBoxMenuItem.
*/
public JCheckBoxMenuItem(Icon icon) {
this(null, icon);
}
/**
* Creates an initially unselected checkboxMenuItem with text.
*
* @param text the text of the CheckBoxMenuItem
*/
public JCheckBoxMenuItem(String text) {
this(text, null);
}
/**
* Creates an initially unselected checkboxMenuItem with the specified text and icon.
*
* @param text the text of the CheckBoxMenuItem
* @param icon the icon of the CheckBoxMenuItem
*/
public JCheckBoxMenuItem(String text, Icon icon) {
setModel(new JToggleButton.ToggleButtonModel());
init(text, icon);
setBorderPainted(false);
setFocusPainted(false);
setHorizontalTextPosition(RIGHT);
setHorizontalAlignment(LEFT);
// setArmedPainted(false);
updateUI();
}
/**
* Creates a checkboxMenuItem with the specified text and selection state.
*
* @param text the text of the CheckBoxMenuItem.
* @param b the selected state of the checkboxmenuitem
*/
public JCheckBoxMenuItem(String text, boolean b) {
this(text);
setSelected(b);
}
/**
* Creates a checkboxMenuItem with the specified text, icon, and selection state.
*
* @param text the text of the CheckBoxMenuItem
* @param icon the icon of the CheckBoxMenuItem
* @param b the selected state of the checkboxmenuitem
*/
public JCheckBoxMenuItem(String text, Icon icon, boolean b) {
this(text, icon);
setSelected(b);
}
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 L&F object that renders this component.
*
* @param ui the new L&F object CheckBoxMenuItemUI
* @see UIDefaults#getUI
* @beaninfo
* description: The menu item's UI delegate
* bound: true
* expert: true
* hidden: true
*/
public void setUI(CheckBoxMenuItemUI ui) {
super.setUI(ui);
}
/**
* Notification from the UIFactory that the L&F
* has changed.
*
* @see JComponent#updateUI
*/
public void updateUI() {
setUI((CheckBoxMenuItemUI)UIManager.getUI(this));
}
/**
* Returns the name of the L&F class
* that renders this component.
*
* @return "CheckBoxMenuItemUI"
* @see JComponent#getUIClassID
* @see UIDefaults#getUI
*/
public String getUIClassID() {
return "CheckBoxMenuItemUI";
}
/**
* Returns the selected-state of the item. This method
* exists for AWT compatibility only. New code should
* use isSelected() instead.
*
* @return true if the item is selected
*/
public boolean getState() {
return isSelected();
}
/**
* Sets the selected-state of the item. This method
* exists for AWT compatibility only. New code should
* use setSelected() instead.
*
* @param b a boolean value indicating the item's
* selected-state, where true=selected
* @beaninfo
* description: The selection state of the Checkbox menu item
* hidden: true
*/
public synchronized void setState(boolean b) {
setSelected(b);
}
/**
* Returns an array (length 1) containing the checkbox menu item
* label or null if the checkbox is not selected.
*
* @return an array containing 1 Object -- the text of the menu item
* -- if the item is selected, otherwise null
*/
public synchronized Object[] getSelectedObjects() {
if (isSelected() == false)
return null;
Object[] selectedObjects = new Object[1];
selectedObjects[0] = getText();
return selectedObjects;
}
/*
* Override Component.requestFocus() to prevent grabbing the 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 AccessibleJCheckBoxMenuItem();
}
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 AccessibleJCheckBoxMenuItem extends AccessibleJMenuItem {
/**
* Get the role of this object.
*
* @return an instance of AccessibleRole describing the role of the
* object
*/
public AccessibleRole getAccessibleRole() {
return AccessibleRole.CHECK_BOX;
}
} // inner class AccessibleJCheckBoxMenuItem
}