001    /*
002     * Copyright 2002-2004 the original author or authors.
003     * 
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not
005     * use this file except in compliance with the License. You may obtain a copy of
006     * the License at
007     * 
008     * http://www.apache.org/licenses/LICENSE-2.0
009     * 
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012     * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
013     * License for the specific language governing permissions and limitations under
014     * the License.
015     */
016    package org.springframework.richclient.application.support;
017    
018    import java.util.Iterator;
019    
020    import org.springframework.richclient.application.ApplicationWindow;
021    import org.springframework.richclient.application.PageComponent;
022    import org.springframework.richclient.application.PageComponentContext;
023    import org.springframework.richclient.command.TargetableActionCommand;
024    import org.springframework.util.Assert;
025    
026    /**
027     * Retargets window-scoped, shared commands when the active View associated with
028     * an ApplicationPage changes.
029     * 
030     * @author Keith Donald
031     */
032    public class SharedCommandTargeter extends PageComponentListenerAdapter {
033        private ApplicationWindow window;
034    
035        public SharedCommandTargeter(ApplicationWindow window) {
036            Assert.notNull(window, "The application window containing targetable shared commands is required");
037            this.window = window;
038        }
039    
040        public void componentFocusGained(PageComponent component) {
041            super.componentFocusGained(component);
042            PageComponentContext context = component.getContext();
043            for (Iterator i = window.getSharedCommands(); i.hasNext();) {
044                TargetableActionCommand globalCommand = (TargetableActionCommand)i.next();
045                globalCommand.setCommandExecutor(context.getLocalCommandExecutor(globalCommand.getId()));
046            }
047        }
048    
049    }