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.base;
017    
018    /**
019     * Interface for components that can be shown or hidden.
020     * 
021     * @since 2.0.4.0
022     * 
023     * @author Carlos Alexandro Becker
024     * 
025     */
026    public interface HasVisibility {
027    
028            /**
029             * Shows the widget if it was previously hidden.
030             */
031            void show();
032    
033            /**
034             * Hides the widget if it was previously shown.
035             */
036            void hide();
037    
038            /**
039             * Toggles the view state of the widget.
040             * 
041             * <p>
042             * It will be hidden if it was previously shown and shown if it was
043             * previously hidden.
044             */
045            void toggle();
046    }