is Ancestor Of Focused Component - Java Swing

Java examples for Swing:JComponent

  1. HOME
  2. Java
  3. Swing
  4. JComponent

Description

is Ancestor Of Focused Component

Demo Code

/**/*  w ww  .j a  va2s. c  om*/
 * $RCSfile$
 * $Revision: 128 $
 * $Date: 2004-10-25 20:42:00 -0300 (Mon, 25 Oct 2004) $
 *
 * Copyright (C) 2004-2008 Jive Software. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;
import java.awt.*;

public class Main {
    /**
     * @return returns true if the component of one of its child has the focus
     */
    public static boolean isAncestorOfFocusedComponent(Component c) {
        if (c.hasFocus()) {
            return true;
        } else {
            if (c instanceof Container) {
                Container cont = (Container) c;
                int n = cont.getComponentCount();
                for (int i = 0; i < n; i++) {
                    Component child = cont.getComponent(i);
                    if (isAncestorOfFocusedComponent(child))
                        return true;
                }
            }
        }
        return false;
    }
}

Related Tutorials