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Java Source | 1998-03-20 | 8.9 KB | 281 lines |
- /*
- * @(#)JCheckBoxMenuItem.java 1.25 98/02/12
- *
- * 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 java.awt.swing;
-
- import java.util.EventListener;
- import java.awt.*;
- import java.awt.event.*;
- import java.awt.image.*;
- import java.awt.swing.plaf.*;
- import java.awt.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>getSelected</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>getSelected</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>
- * 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 1.25 02/12/98
- * @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
- }
-