001    /*
002     * Created on Oct 7, 2008
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005     * in compliance with the License. You may obtain a copy of the License at
006     *
007     * http://www.apache.org/licenses/LICENSE-2.0
008     *
009     * Unless required by applicable law or agreed to in writing, software distributed under the License
010     * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011     * or implied. See the License for the specific language governing permissions and limitations under
012     * the License.
013     *
014     * Copyright @2008-2010 the original author or authors.
015     */
016    package org.fest.swing.query;
017    
018    import static org.fest.swing.edt.GuiActionRunner.execute;
019    
020    import java.awt.Component;
021    
022    import org.fest.swing.annotation.RunsInEDT;
023    import org.fest.swing.edt.GuiQuery;
024    
025    /**
026     * Understands an action, executed in the event dispatch thread, that indicates whether a <code>{@link Component}</code>
027     * has focus or not.
028     * @see Component#hasFocus()
029     *
030     * @author Yvonne Wang
031     */
032    public final class ComponentHasFocusQuery {
033    
034      /**
035       * Indicates whether the given <code>{@link Component}</code> has input focus or not. This action is executed in the 
036       * event dispatch thread.
037       * @param component the given <code>Component</code>.
038       * @return <code>true</code> if the given <code>Component</code> has input focus, <code>false</code> otherwise.
039       * @see Component#hasFocus()
040       */
041      @RunsInEDT
042      public static boolean hasFocus(final Component component) {
043        return execute(new GuiQuery<Boolean>() {
044          protected Boolean executeInEDT() {
045            return component.hasFocus();
046          }
047        });
048      }
049    
050      private ComponentHasFocusQuery() {}
051    }