/* Element.java -- Representation of a diagram element. Copyright (C) 2005 The University of Sheffield. This file is part of the CASheW-s editor Eclipse plug-in. The CASheW-s editor Eclipse plug-in is free software; you may copy, modify, and redistribute it under the terms of the GNU General Public License version 2 (or, at your option, any later version), and/or the Eclipse Public License version 1.0. The CASheW-s editor 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 The CASheW-s editor; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. The University of Sheffield makes available all content in this plug-in ("Content"). Unless otherwise indicated below, the Content is provided to you under the terms and conditions of the Eclipse Public License Version 1.0 ("EPL"). A copy of the EPL is available at http://www.eclipse.org/legal/epl-v10.html. For purposes of the EPL, "Program" will mean the Content. If you did not receive this Content directly from the University of Sheffield, the Content is being redistributed by another party ("Redistributor") and different terms and conditions may apply to your use of any object code in the Content. Check the Redistributor's license that was provided with the Content. If no such license exists, contact the Redistributor. Unless otherwise indicated below, the terms and conditions of the EPL still apply to any source code in the Content. */ package nongnu.cashews.eclipse.composer.model; import java.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; import java.io.IOException; import java.io.ObjectInputStream; import java.io.Serializable; // abstract base class of elements in the model public abstract class Element implements Cloneable, Serializable { // serialization version static final long serialVersionUID = 1; // property change listeners transient protected PropertyChangeSupport listeners = new PropertyChangeSupport( this); public void addPropertyChangeListener(PropertyChangeListener listener) { listeners.addPropertyChangeListener(listener); } protected void firePropertyChange(String prop, Object old, Object newValue) { listeners.firePropertyChange(prop, old, newValue); } protected void fireStructureChange(String prop, Object child) { listeners.firePropertyChange(prop, null, child); } // implemented in order to create listeners field private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException { in.defaultReadObject(); listeners = new PropertyChangeSupport(this); } public void removePropertyChangeListener(PropertyChangeListener l) { listeners.removePropertyChangeListener(l); } }