/*
* Copyright 1996-2003 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package java.awt;
import java.awt.event.KeyEvent;
/**
* The <code>MenuShortcut</code>class represents a keyboard accelerator
* for a MenuItem.
* <p>
* Menu shortcuts are created using virtual keycodes, not characters.
* For example, a menu shortcut for Ctrl-a (assuming that Control is
* the accelerator key) would be created with code like the following:
* <p>
* MenuShortcut ms = new MenuShortcut(KeyEvent.VK_A, false);
* <p>
* The accelerator key is platform-dependent and may be obtained
* via {@link Toolkit#getMenuShortcutKeyMask}.
*
* @author Thomas Ball
* @since JDK1.1
*/
public class MenuShortcut implements java.io.Serializable
{
/**
* The virtual keycode for the menu shortcut.
* This is the keycode with which the menu shortcut will be created.
* Note that it is a virtual keycode, not a character,
* e.g. KeyEvent.VK_A, not 'a'.
* Note: in 1.1.x you must use setActionCommand() on a menu item
* in order for its shortcut to work, otherwise it will fire a null
* action command.
*
* @serial
* @see #getKey()
* @see #usesShiftModifier()
* @see java.awt.event.KeyEvent
* @since JDK1.1
*/
int key;
/**
* Indicates whether the shft key was pressed.
* If true, the shift key was pressed.
* If false, the shift key was not pressed
*
* @serial
* @see #usesShiftModifier()
* @since JDK1.1
*/
boolean usesShift;
/*
* JDK 1.1 serialVersionUID
*/
private static final long serialVersionUID = 143448358473180225L;
/**
* Constructs a new MenuShortcut for the specified virtual keycode.
* @param key the raw keycode for this MenuShortcut, as would be returned
* in the keyCode field of a {@link java.awt.event.KeyEvent KeyEvent} if
* this key were pressed.
* @see java.awt.event.KeyEvent
**/
public MenuShortcut(int key) {
this(key, false);
}
/**
* Constructs a new MenuShortcut for the specified virtual keycode.
* @param key the raw keycode for this MenuShortcut, as would be returned
* in the keyCode field of a {@link java.awt.event.KeyEvent KeyEvent} if
* this key were pressed.
* @param useShiftModifier indicates whether this MenuShortcut is invoked
* with the SHIFT key down.
* @see java.awt.event.KeyEvent
**/
public MenuShortcut(int key, boolean useShiftModifier) {
this.key = key;
this.usesShift = useShiftModifier;
}
/**
* Returns the raw keycode of this MenuShortcut.
* @return the raw keycode of this MenuShortcut.
* @see java.awt.event.KeyEvent
* @since JDK1.1
*/
public int getKey() {
return key;
}
/**
* Returns whether this MenuShortcut must be invoked using the SHIFT key.
* @return <code>true</code> if this MenuShortcut must be invoked using the
* SHIFT key, <code>false</code> otherwise.
* @since JDK1.1
*/
public boolean usesShiftModifier() {
return usesShift;
}
/**
* Returns whether this MenuShortcut is the same as another:
* equality is defined to mean that both MenuShortcuts use the same key
* and both either use or don't use the SHIFT key.
* @param s the MenuShortcut to compare with this.
* @return <code>true</code> if this MenuShortcut is the same as another,
* <code>false</code> otherwise.
* @since JDK1.1
*/
public boolean equals(MenuShortcut s) {
return (s != null && (s.getKey() == key) &&
(s.usesShiftModifier() == usesShift));
}
/**
* Returns whether this MenuShortcut is the same as another:
* equality is defined to mean that both MenuShortcuts use the same key
* and both either use or don't use the SHIFT key.
* @param obj the Object to compare with this.
* @return <code>true</code> if this MenuShortcut is the same as another,
* <code>false</code> otherwise.
* @since 1.2
*/
public boolean equals(Object obj) {
if (obj instanceof MenuShortcut) {
return equals( (MenuShortcut) obj );
}
return false;
}
/**
* Returns the hashcode for this MenuShortcut.
* @return the hashcode for this MenuShortcut.
* @since 1.2
*/
public int hashCode() {
return (usesShift) ? (~key) : key;
}
/**
* Returns an internationalized description of the MenuShortcut.
* @return a string representation of this MenuShortcut.
* @since JDK1.1
*/
public String toString() {
int modifiers = 0;
if (!GraphicsEnvironment.isHeadless()) {
modifiers = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
}
if (usesShiftModifier()) {
modifiers |= Event.SHIFT_MASK;
}
return KeyEvent.getKeyModifiersText(modifiers) + "+" +
KeyEvent.getKeyText(key);
}
/**
* Returns the parameter string representing the state of this
* MenuShortcut. This string is useful for debugging.
* @return the parameter string of this MenuShortcut.
* @since JDK1.1
*/
protected String paramString() {
String str = "key=" + key;
if (usesShiftModifier()) {
str += ",usesShiftModifier";
}
return str;
}
}