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.command;
017    
018    import javax.swing.Icon;
019    
020    import org.springframework.richclient.command.config.CommandFaceDescriptor;
021    
022    /**
023     * A {@link CommandGroup} that can only contain ToggleCommands and for which only one togglecommand can be
024     * chosen. Comparable to a radio button group.
025     */
026    public class ExclusiveCommandGroup extends CommandGroup {
027    
028        private ExclusiveCommandGroupSelectionController controller = new ExclusiveCommandGroupSelectionController();
029    
030        public ExclusiveCommandGroup() {
031            super();
032        }
033    
034        public ExclusiveCommandGroup(String groupId) {
035            super(groupId);
036        }
037    
038        public ExclusiveCommandGroup(String groupId, CommandFaceDescriptor faceDescriptor) {
039            super(groupId, faceDescriptor);
040        }
041    
042        public ExclusiveCommandGroup(String groupId, CommandRegistry commandRegistry) {
043            super(groupId, commandRegistry);
044        }
045    
046        public ExclusiveCommandGroup(String id, String encodedLabel) {
047            super(id, encodedLabel);
048        }
049    
050        public ExclusiveCommandGroup(String id, String encodedLabel, Icon icon, String caption) {
051            super(id, encodedLabel, icon, caption);
052        }
053    
054        public void setAllowsEmptySelection(boolean allowsEmptySelection) {
055            controller.setAllowsEmptySelection(allowsEmptySelection);
056        }
057    
058        public boolean getAllowsEmptySelection() {
059            return controller.getAllowsEmptySelection();
060        }
061    
062        protected ExclusiveCommandGroupSelectionController getSelectionController() {
063            return controller;
064        }
065    
066        public boolean isAllowedMember(AbstractCommand prospectiveMember) {
067            return prospectiveMember instanceof ToggleCommand;
068        }
069    }