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From: Dancing Fingers on 31 Jul 2010 08:22 Hi guys, Does anyone know if there's an easy way to animate button that move over time? I'm thinking: about using LayoutManager, creating mock buttons, emptying LayoutManager, animating the mock buttons, using LayoutManager again and deleting the mock buttons. This seems like a lot of work to get from point A to Point B? Any advice would be appreciated. Chris
From: John B. Matthews on 31 Jul 2010 09:26
In article <6ab59a66-ccda-4c67-9cc3-bcadb16cae1d(a)g19g2000yqc.googlegroups.com>, Dancing Fingers <batymahn(a)gmail.com> wrote: > Does anyone know if there's an easy way to animate button that move > over time? I'm thinking: about using LayoutManager, creating mock > buttons, emptying LayoutManager, animating the mock buttons, using > LayoutManager again and deleting the mock buttons. This seems like a > lot of work to get from point A to Point B? Any advice would be > appreciated. You can use a layout manager to establish the initial geometry and then do setBounds() to move the button(s). Try resizing the window in the example below both with and without a subsequent null layout. import java.awt.Dimension; import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.Rectangle; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.List; import java.util.Random; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; /** @author John B. Matthews */ public class ButtonTest extends JPanel implements ActionListener { private static final Random rnd = new Random(); private final Timer timer = new Timer(500, this); private final List<JButton> buttons = new ArrayList<JButton>(); public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new ButtonTest().create(); } }); } private void create() { JFrame f = new JFrame("ButtonTest"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); timer.start(); } public ButtonTest() { super(new GridLayout(5, 2)); this.setPreferredSize(new Dimension(640, 480)); for (int i = 0; i < 10; i++) { JButton b = new JButton(String.valueOf(i)); buttons.add(b); this.add(b); } } @Override public void actionPerformed(ActionEvent e) { for (JButton b : buttons) { Rectangle r = b.getBounds(); r.setBounds( rnd.nextInt(getWidth() - r.width), rnd.nextInt(getHeight() - r.height), r.width, r.height); b.setBounds(r); } } } -- John B. Matthews trashgod at gmail dot com <http://sites.google.com/site/drjohnbmatthews> |