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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 *

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 */

/*

  @test      %W% %E%

  @bug       6598089

  @summary   Tests restoring focus on a single disabled coponent

  @author    Anton Tarasov: area=awt-focus

  @library   ../../regtesthelpers

  @build     Util

  @run       main RestoreFocusOnDisabledComponentTest

*/

import java.awt.*;

import java.awt.event.*;

import java.applet.Applet;

import test.java.awt.regtesthelpers.Util;

/*

 * The bug is not reproducible on Windows.

 */

public class RestoreFocusOnDisabledComponentTest extends Applet {

    Frame frame = new Frame("Frame") {public String toString() {return "FRAME";}};

    Button b0 = new Button("button0") {public String toString() {return "B-0";}};

    Button b1 = new Button("button1") {public String toString() {return "B-1";}};

    volatile int nFocused;

    Robot robot;

    public static void main(String[] args) {

        RestoreFocusOnDisabledComponentTest app = new RestoreFocusOnDisabledComponentTest();

        app.init();

        app.start();

    }

    public void init() {

        robot = Util.createRobot();

    }

    public void start() {

        frame.add(b0);

        frame.add(b1);

        frame.setLayout(new FlowLayout());

        frame.pack();

        frame.setVisible(true);

        Util.waitForIdle(robot);

        KeyboardFocusManager.setCurrentKeyboardFocusManager(new DefaultKeyboardFocusManager() {

            public boolean dispatchEvent(AWTEvent e) {

                if (e.getID() == FocusEvent.FOCUS_GAINED) {

                    // Trying to emulate timings. b1 should be disabled just by the time it gets

                    // FOCUS_GAINED event. The latter is a result of disabling b0 that initiates

                    // focus auto transfer.

                    if (e.getSource() == b1) {

                        b1.setEnabled(false);

                    } else if (e.getSource() == b0) {

                        if (++nFocused > 10) {

                            nFocused = -1;

                            throw new TestFailedException("Focus went into busy loop!");

                        }

                    }

                }

                return super.dispatchEvent(e);

            }

        });

        // Initiating focus auto transfer.

        // Focus will be requested to b1. When FOCUS_GAINED is being dispatched to b1, it will

        // be disabled. This will trigger focus restoring. Focus will be requested to b0 (the

        // last opposite component). When FOCUS_GAINED is being dispatched to b0, it will

        // also be disabled. However, the last opposite component (and the most recent focus owner)

        // will still be b0. When DKFM initiates focus restoring it should detect restoring

        // on the same component and break.

        b0.setEnabled(false);

        Util.waitForIdle(robot);

        if (nFocused != -1) {

            System.out.println("Test passed.");

        }

    }

}

class TestFailedException extends RuntimeException {

    TestFailedException(String msg) {

        super("Test failed: " + msg);

    }

}