Java Swing Focus hasFocusOwner(final Component component)

Description

Returns whether component or any of its children has focus or not.

License

Open Source License

Parameter

Parameter	Description
component	component to process

Return

true if component or any of its children has focus, false otherwise

Declaration

public static boolean hasFocusOwner(final Component component) 

Method Source Code

//package com.java2s;
/*//  www.  j  a  v  a 2 s.c o m
 * This file is part of WebLookAndFeel library.
 *
 * WebLookAndFeel library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * WebLookAndFeel library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WebLookAndFeel library.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.awt.Component;

import java.awt.Container;

import javax.swing.FocusManager;

public class Main {
    /**
     * Returns whether component or any of its children has focus or not.
     *
     * @param component
     *            component to process
     * @return true if component or any of its children has focus, false
     *         otherwise
     */
    public static boolean hasFocusOwner(final Component component) {
        final Component focusOwner = FocusManager.getCurrentManager().getFocusOwner();
        return component == focusOwner
                || component instanceof Container && ((Container) component).isAncestorOf(focusOwner);
    }
}

Related

1. focusOnOpen(final JComponent component)
2. getFocusableComponentOrChild(Component c, boolean deepest)
3. getFocusableComponentOrChild(Component c, boolean deepest)
4. getPermanentFocusOwner()
5. hasFocus(Component component)
6. installDefaultFocusHandling(Container c)
7. installFocusCycleRoot(Container c, FocusTraversalPolicy cyclePolicy)
8. installJComponentRepainterOnWindowFocusChanged( JComponent component)
9. installJComponentRepainterOnWindowFocusChanged(JComponent component)