/**
* Copyright 2005 Bushe Enterprises, Inc., Hopkinton, MA, USA, www.bushe.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.bushe.swing.action;
import java.util.EventListener;
import javax.swing.Action;
/**
* An interface that allows actions to defer the enabled state computation to
* another class.
* <p>
* An application controller may implement this method and set itself on the action
* to enable and disable the action whenever updateEnabledState is called on the action.
* @see org.bushe.swing.action.DelegatesEnabled
* @author Michael Bushe
*/
public interface ShouldBeEnabledDelegate extends EventListener {
/**
* Called by the action to ask the action whether it should be enabled or
* disabled given the current "state of affairs."
* <p>
* Makes no change to the action.
* @return whether setEnabled should be called with false or true
*/
public boolean shouldBeEnabled(Action action);
}