de.schlichtherle.truezip.key.pbe.swing.HurlingWindowFeedback Maven / Gradle / Ivy

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The file system driver family for ZIP and related archive file types. Add the JAR artifact of this module to the run time class path to make its file system drivers available for service location in the client API modules.

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/*
 * Copyright (C) 2005-2013 Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package de.schlichtherle.truezip.key.pbe.swing;

import static de.schlichtherle.truezip.key.SafeKeyProvider.MIN_KEY_RETRY_DELAY;
import java.awt.Point;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.Timer;

/**
 * Provides run by beeping using the default toolkit, disabling the
 * default button in the root pane for three seconds and concurrently
 * hurling the containing window for 1.5 seconds.
 * 
 * This class is inspired by chapter #38 "Earthquake Dialog" of the book
 * "Swing Hacks" by Joshua Marinacci & Chris Adamson, published by O'Reilly
 * in 2005.
 *
 * @author Christian Schlichtherle
 */
public class HurlingWindowFeedback extends BasicInvalidKeyFeedback {

    private static final double PI      = Math.PI;
    private static final double TWO_PI  = 2.0 * PI;
    
    public static final int AMPLITUDE = 25;
    public static final int CYCLE     = 150;
    public static final int DURATION  = 1500;
    public static final int FPS       = 75;

    private final double amplitude;
    private final double cycle;
    private final int    duration;
    private final int    fps;
    
    public HurlingWindowFeedback() {
        this(AMPLITUDE, CYCLE, DURATION, FPS);
    }

    /**
     * Constructs a new {@code HurlingWindowFeedback}.
     * 
     * @param amplitude the amplitude of pixels for offsetting the window.
     * @param cycle milliseconds required for one cycle.
     * @param duration millisecons of duration of quake.
     * @param fps frames per second for animation.
     */
    protected HurlingWindowFeedback(    final int amplitude,
                                        final int cycle,
                                        final int duration,
                                        final int fps) {
        super(duration > MIN_KEY_RETRY_DELAY ? duration : MIN_KEY_RETRY_DELAY);
        this.amplitude = amplitude;
        this.cycle     = cycle;
        this.duration  = duration;
        this.fps       = fps;
    }

    @Override
    public void run(JPanel panel) {
        final Window window = SwingUtilities.getWindowAncestor(panel);
        super.run(panel); // temporarily disable default button
        if (null == window)
            return;
        final Point origin = window.getLocation();
        final long start = System.currentTimeMillis();
        final Timer timer = new Timer(1000 / fps, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                final long elapsed = System.currentTimeMillis() - start;
                if (elapsed < duration && window.isShowing()) {
                    final double angle = TWO_PI * elapsed / cycle;
                    final double offset
                            = Math.sin(PI * elapsed / duration) * amplitude;
                    final int x = (int) (Math.cos(angle) * offset + origin.x);
                    final int y = (int) (Math.sin(angle) * offset + origin.y);
                    window.setLocation(x, y);
                    window.repaint();
                } else {
                    ((Timer) e.getSource()).stop();
                    window.setLocation(origin);
                    window.repaint();
                }
            }
        });
        timer.start();
    }
}