lwclipboardman.java

Zaval Light-Weight Visual Components Library (LwVCL) is a pure Java alternative to humble AWT-based

/**
 *     Caption: Zaval Light-Weight Visual Components Library
 *     $Revision: 2.79 $
 *     $Date: 2003/08/22 11:24:16 $
 *
 *     @author:     Andrei Vishnevsky
 *     @version:    3.50
 *
 * Zaval Light-Weight Visual Components Library (LwVCL) is a pure Java
 * alternative to humble AWT-based and SWING-based GUI interfaces for
 * wide ranges of platforms, including J2SE, PersonalJava and J2ME.
 *
 * Designed as light-weight but, alternatively to Swing, built separately
 * from AWT (not on top of the java.awt library like Swing), the LwVCL is
 * the good alternative to highly performant, memory-efficient, flexible
 * GUI solution for embedded, stand-alone and applet applications.
 *
 * For more info on this product read Zaval Light-Weight Visual Components Library Tutorial
 * (It comes within this package).
 * The latest product version is always available from the product's homepage:
 * http://www.zaval.org/products/lwvcl/
 * and from the SourceForge:
 * http://sourceforge.net/projects/zaval0003/
 *
 * Contacts:
 *   Support : [e-mail]
 *   Change Requests : [e-mail]
 *   Feedback : [e-mail]
 *   Other : [e-mail]
 *
 * Copyright (C) 2001-2003  Zaval Creative Engineering Group (http://www.zaval.org)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * (version 2) as published by the Free Software Foundation.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */
package org.zaval.lw;

/**
 * This class implements simple clipboard manager for the library. The clipboard shares data only
 * for components of the light weight library, it means that the clipboard data cannot be used
 * by other (non-LwVCL) applications. But it is very easy to implement own manager
 * for example basing on java.awt.datatransfer.Clipboard and use it for the library.
 */
public class LwClipboardMan
{
 /**
  * The current instance of the clipboard manager implementation. The implementation has
  * to be used with the library components to interact with the clipboard.
  */
  public static LwClipboardMan manager;

  private Object data;

 /**
  * Gets the content of the clipboard.
  * @return a content. Returns <code>null</code> if the clipboard is empty.
  */
  public synchronized Object get() {
    return data;
  }

 /**
  * Sets the specified content for the clipboard.
  * @param <code>o</code> the specified content.
  */
  public synchronized void put (Object o) {
    data = o;
  }

 /**
  * Clears clipboard.
  */
  public synchronized void clear() {
    data = null;
  }
}