324 lines
7.3 KiB
Java
324 lines
7.3 KiB
Java
/* MenuComponent.java -- Superclass of all AWT menu components
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Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt;
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import java.awt.peer.MenuComponentPeer;
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// FIXME: Java 1.0 event model unimplemented
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/**
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* This is the superclass of all non-menu AWT widgets.
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*
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* @author Aaron M. Renn (arenn@urbanophile.com)
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*/
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public abstract class MenuComponent implements java.io.Serializable
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{
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/*
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* Static Variables
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*/
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// Serialization Constant
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private static final long serialVersionUID = -4536902356223894379L;
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/*************************************************************************/
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/*
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* Instance Variables
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*/
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// FIXME: missing serialized fields `nameExplicitlySet',
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// `newEventsOnly', and `accessibleContext'.
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// The font for this component
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private Font font;
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// The name of the component
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private String name;
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// The parent of this component
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transient MenuContainer parent;
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// The native peer for this componet
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transient MenuComponentPeer peer;
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// The synchronization locking object for this component
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private transient Object tree_lock = this;
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// The toolkit for this object
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private static transient Toolkit toolkit = Toolkit.getDefaultToolkit();
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/*************************************************************************/
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/*
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* Constructors
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*/
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/**
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* Default constructor for subclasses.
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*/
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protected
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MenuComponent()
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{
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}
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/*************************************************************************/
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/*
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* Instance Methods
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*/
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/**
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* Returns the font in use for this component.
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*
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* @return The font for this component.
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*/
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public Font
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getFont()
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{
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return(font);
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}
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/*************************************************************************/
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/**
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* Sets the font for this component to the specified font.
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*
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* @param font The new font for this component.
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*/
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public void
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setFont(Font font)
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{
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this.font = font;
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}
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/*************************************************************************/
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/**
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* Returns the name of this component.
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*
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* @return The name of this component.
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*/
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public String
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getName()
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{
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return(name);
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}
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/*************************************************************************/
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/**
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* Sets the name of this component to the specified name.
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*
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* @param name The new name of this component.
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*/
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public void
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setName(String name)
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{
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this.name = name;
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}
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/*************************************************************************/
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/**
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* Returns the parent of this component.
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*
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* @return The parent of this component.
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*/
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public MenuContainer
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getParent()
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{
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return(parent);
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}
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/*************************************************************************/
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// Sets the parent of this component.
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final void
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setParent(MenuContainer parent)
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{
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this.parent = parent;
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}
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/*************************************************************************/
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/**
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* Returns the native windowing system peer for this component.
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*
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* @return The peer for this component.
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*/
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public MenuComponentPeer
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getPeer()
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{
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return(peer);
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}
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/*************************************************************************/
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// Sets the peer for this component.
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final void
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setPeer(MenuComponentPeer peer)
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{
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this.peer = peer;
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}
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/*************************************************************************/
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/**
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* Destroys this component's native peer
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*/
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public void
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removeNotify()
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{
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if (peer != null)
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peer.dispose();
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peer = null;
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}
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/*************************************************************************/
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/**
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* Returns the toolkit in use for this component.
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*
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* @return The toolkit for this component.
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*/
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final Toolkit
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getToolkit()
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{
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return(toolkit);
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}
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/*************************************************************************/
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/**
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* Returns the object used for synchronization locks on this component
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* when performing tree and layout functions.
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*
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* @return The synchronization lock for this component.
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*/
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protected final Object
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getTreeLock()
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{
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return(tree_lock);
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}
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/*************************************************************************/
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// The sync lock object for this component.
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final void
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setTreeLock(Object tree_lock)
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{
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this.tree_lock = tree_lock;
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}
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/*************************************************************************/
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/**
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* AWT 1.0 event dispatcher.
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*
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* @deprecated Deprecated in favor of <code>dispatchEvent()</code>.
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*/
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public boolean
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postEvent(Event event)
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{
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return(false);
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}
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/*************************************************************************/
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/**
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* Sends this event to this component or a subcomponent for processing.
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*
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* @param event The event to dispatch
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*/
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public final void
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dispatchEvent(AWTEvent event)
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{
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// See comment in Component.dispatchEvent().
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dispatchEventImpl(event);
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}
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void
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dispatchEventImpl(AWTEvent e)
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{
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// This is overridden by subclasses that support events.
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}
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/*************************************************************************/
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/**
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* Processes the specified event. In this class, this method simply
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* calls one of the more specific event handlers.
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*
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* @param event The event to process.
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*/
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protected void
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processEvent(AWTEvent event)
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{
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}
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/*************************************************************************/
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/**
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* Returns a string representation of this component.
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*
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* @return A string representation of this component
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*/
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public String
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toString()
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{
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return this.getClass().getName() + "[" + paramString() + "]";
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}
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/*************************************************************************/
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/**
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* Returns a debugging string for this component
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*/
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protected String
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paramString()
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{
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return "name=" + getName();
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}
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// Accessibility API not yet implemented.
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// public AccessibleContext getAccessibleContext()
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} // class Component
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