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package net.miginfocom.demo;
import net.miginfocom.swing.MigLayout;
import net.miginfocom.layout.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
import java.util.IdentityHashMap;
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(60 * fact), ""), new BoundSize(new UnitValue(60 * 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);
}
}
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