package net.miginfocom.demo;

 import net.miginfocom.layout.BoundSize;

 import net.miginfocom.layout.ComponentWrapper;

 import net.miginfocom.layout.LayoutCallback;

 import net.miginfocom.layout.UnitValue;

 import net.miginfocom.swing.MigLayout;

 import javax.swing.*;

 import java.awt.*;

 import java.awt.event.*;

 import java.util.IdentityHashMap;

 /*

  * License (BSD):

  * ==============

  *

  * Copyright (c) 2004, Mikael Grev, MiG InfoCom AB. (miglayout (at) miginfocom (dot) com)

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without modification,

  * are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice, this list

  * of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above copyright notice, this

  * list of conditions and the following disclaimer in the documentation and/or other

  * materials provided with the distribution.

  * Neither the name of the MiG InfoCom AB nor the names of its contributors may be

  * used to endorse or promote products derived from this software without specific

  * prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

  * IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,

  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY

  * OF SUCH DAMAGE.

  *

  * @version 1.0

  * @author Mikael Grev, MiG InfoCom AB

  *         Date: 2006-sep-08

  */

 public class CallbackDemo extends JFrame implements ActionListener, MouseMotionListener, MouseListener

 {

         private final Timer repaintTimer = new Timer(20, new ActionListener() {

                 public void actionPerformed(ActionEvent e) {

                         ((JPanel) getContentPane()).revalidate();

                 }

         });

         private final IdentityHashMap<Object, Long> pressMap = new IdentityHashMap<Object, Long>();

         private Point mousePos = null;

         public CallbackDemo()

         {

                 super("MiG Layout Callback Demo");

                 MigLayout migLayout = new MigLayout("align center bottom, insets 30");

                 final JPanel panel = new JPanel(migLayout) {

                         protected void paintComponent(Graphics g)

                         {

                                 ((Graphics2D) g).setPaint(new GradientPaint(0, getHeight() / 2, Color.WHITE, 0, getHeight(), new Color(240, 238, 235)));

                                 g.fillRect(0, 0, getWidth(), getHeight());

                         }

                 };

                 setContentPane(panel);

                 // This callback methods will be called for every layout cycle and let you make correction before and after the calculations.

                 migLayout.addLayoutCallback(new LayoutCallback() {

                         // This is the size change part

                         public BoundSize[] getSize(ComponentWrapper comp)

                         {

                                 if (comp.getComponent() instanceof JButton) {

                                         Component c = (Component) comp.getComponent();

                                         Point p = mousePos != null ? SwingUtilities.convertPoint(panel, mousePos, c) : new Point(-1000, -1000);

                                         float fact = (float) Math.sqrt(Math.pow(Math.abs(p.x - c.getWidth() / 2f), 2) + Math.pow(Math.abs(p.y - c.getHeight() / 2f), 2));

                                         fact = Math.max(2 - (fact / 200), 1);

                                         return new BoundSize[] {new BoundSize(new UnitValue(70 * fact), ""), new BoundSize(new UnitValue(70 * fact), "")};

                                 }

                                 return null;

                         }

                         // This is the jumping part

                         public void correctBounds(ComponentWrapper c)

                         {

                                 Long pressedNanos = pressMap.get(c.getComponent());

                                 if (pressedNanos != null) {

                                         long duration = System.nanoTime() - pressedNanos;

                                         double maxHeight = 100.0 - (duration / 100000000.0);

                                         int deltaY = (int) Math.round(Math.abs(Math.sin((duration) / 300000000.0) * maxHeight));

                                         c.setBounds(c.getX(), c.getY() - deltaY, c.getWidth(), c.getHeight());

                                         if (maxHeight < 0.5) {

                                                 pressMap.remove(c.getComponent());

                                                 if (pressMap.size() == 0)

                                                         repaintTimer.stop();

                                         }

                                 }

                         }

                 });

                 for (int j = 0; j < 10; j++)

                         panel.add(createButton(j), "aligny 0.8al");

                 JLabel label = new JLabel("Can't you just feel the urge to press one of those Swing JButtons?");

                 label.setFont(new Font("verdana", Font.PLAIN, 24));

                 label.setForeground(new Color(150, 150, 150));

                 panel.add(label, "pos 0.5al 0.2al");

                 panel.addMouseMotionListener(this);

                 panel.addMouseListener(this);

         }

         private static Font[] FONTS = new Font[120];

         private JButton createButton(int i)

         {

                 JButton button = new JButton(String.valueOf("MIG LAYOUT".charAt(i))) {

                         public Font getFont()

                         {

                                 if (FONTS[0] == null) {

                                         for (int i = 0; i < FONTS.length; i++)

                                                 FONTS[i] = new Font("tahoma", Font.PLAIN, i);

                                 }

                                 return FONTS[getWidth() >> 1];

                         }

                 };

                 button.setForeground(new Color(100, 100, 100));

                 button.setFocusPainted(false);

                 button.addMouseMotionListener(this);

                 button.addActionListener(this);

                 button.setMargin(new Insets(0, 0, 0, 0));

                 return button;

         }

         public void mouseDragged(MouseEvent e) {}

         public void mouseMoved(MouseEvent e)

         {

                 if (e.getSource() instanceof JButton) {

                         mousePos = SwingUtilities.convertPoint((Component) e.getSource(), e.getPoint(), getContentPane());

                 } else {

                         mousePos = e.getPoint();

                 }

                 ((JPanel) getContentPane()).revalidate();

         }

         public void mousePressed(MouseEvent e) {}

         public void mouseReleased(MouseEvent e) {}

         public void mouseClicked(MouseEvent e) {}

         public void mouseEntered(MouseEvent e) {}

         public void mouseExited(MouseEvent e)

         {

                 mousePos = null;

                 ((JPanel) getContentPane()).revalidate();

         }

         public void actionPerformed(ActionEvent e)

         {

                 pressMap.put(e.getSource(), System.nanoTime());

                 repaintTimer.start();

         }

         public static void main(String args[])

         {

                 try {

                         UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

                 } catch (Exception ex) {}

                 CallbackDemo demoFrame = new CallbackDemo();

                 demoFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

                 demoFrame.setSize(970, 500);

                 demoFrame.setLocationRelativeTo(null);

                 demoFrame.setVisible(true);

         }

 }