/* ========================================================================
* JCommon : a free general purpose class library for the Java(tm) platform
* ========================================================================
*
* (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jcommon/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------------
* ActionConcentrator.java
* -----------------------
* (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
*
* Original Author: Thomas Morgner;
* Contributor(s): David Gilbert (for Object Refinery Limited);
*
* $Id: ActionConcentrator.java,v 1.4 2007/11/02 17:50:36 taqua Exp $
*
* Changes
* -------
* 24-Aug-2003 : Initial version
* 07-Jun-2004 : Corrected source headers (DG);
*/
package org.jfree.ui.action;
import java.util.ArrayList;
import javax.swing.Action;
/**
* This class is used to collect actions to be enabled or disabled
* by a sinle call.
*
* @author Thomas Morgner
*/
public class ActionConcentrator {
/** The collection used to store the actions of this concentrator. */
private final ArrayList actions;
/**
* DefaultConstructor.
*/
public ActionConcentrator() {
this.actions = new ArrayList();
}
/**
* Adds the action to this concentrator.
*
* @param a the action to be added.
*/
public void addAction(final Action a) {
if (a == null) {
throw new NullPointerException();
}
this.actions.add(a);
}
/**
* Removes the action from this concentrator.
*
* @param a the action to be removed.
*/
public void removeAction(final Action a) {
if (a == null) {
throw new NullPointerException();
}
this.actions.remove(a);
}
/**
* Defines the state for all actions.
*
* @param b the new state for all actions.
*/
public void setEnabled(final boolean b) {
for (int i = 0; i < this.actions.size(); i++) {
final Action a = (Action) this.actions.get(i);
a.setEnabled(b);
}
}
/**
* Returns, whether all actions are disabled.
* If one action is enabled, then this method will return
* true.
*
* @return true, if at least one action is enabled, false
* otherwise.
*/
public boolean isEnabled() {
for (int i = 0; i < this.actions.size(); i++) {
final Action a = (Action) this.actions.get(i);
if (a.isEnabled()) {
return true;
}
}
return false;
}
}