001    /*
002     * Copyright 2006 Mat Gessel <mat.gessel@gmail.com>
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 asquare.gwt.tk.client.ui.behavior;
017    
018    import com.google.gwt.user.client.ui.HasFocus;
019    
020    public interface FocusModelListener
021    {
022            /**
023             * Called when widgets are added to the focus cycle. 
024             * 
025             * @param model the focus model that originated the event
026             * @param added an array of 1 or more widgets
027             */
028            void widgetsAdded(FocusModel model, HasFocus[] added);
029    
030            /**
031             * Called when widgets are removed from the focus cycle. 
032             * 
033             * @param model the focus model that originated the event
034             * @param removed an array of 1 or more widgets
035             */
036            void widgetsRemoved(FocusModel model, HasFocus[] removed);
037    }