001    /*
002     *  Copyright 2012 GWT-Bootstrap
003     *
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of 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,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package com.github.gwtbootstrap.client.ui.event;
017    
018    import com.google.gwt.event.shared.HandlerRegistration;
019    
020    /**
021     * Interface for widgets that handle {@link CloseEvent}s and {@link ClosedEvent}
022     * s.
023     * 
024     * @since 2.0.4.0
025     * 
026     * @author Dominik Mayer
027     * 
028     */
029    public interface HasCloseHandlers {
030    
031            /**
032             * Adds a {@link CloseHandler} to the widget.
033             * 
034             * @param handler
035             *            the handler
036             * @return {@link HandlerRegistration} used to remove this handler
037             */
038            HandlerRegistration addCloseHandler(CloseHandler handler);
039    
040            /**
041             * Adds a {@link ClosedHandler} to the widget.
042             * 
043             * @param handler
044             *            the handler
045             * @return {@link HandlerRegistration} used to remove this handler
046             */
047            HandlerRegistration addClosedHandler(ClosedHandler handler);
048    
049    }