StackOverflow2013

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POChange location JLabel on JPanel repaint
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copied!<p>I'm building a Java application. GameView has a BoardView which contains multiple PawnViews (in the example just one).</p> <p>Example:</p> <pre><code> public class GameView extends Frame { public GameView() { AWTUtilities.setWindowOpaque(this, false); this.setUndecorated(true); this.setLayout(null); this.setResizable(false); this._boardview = new BoardView(); int x = 0; int y = 0; PawnView pv = new PawnView(); this._boardview.AddPawn(pv, 10, 10); this._boardview.MovePawn(pv, 20, 10); } } public class BoardView extends JPanel { public BoardView() { this.setOpaque(false); RepaintManager.currentManager(null).setDoubleBufferingEnabled(true); this.setLayout(null); } @Override public void update(Graphics g) { paint(g); } public void AddPawn(PawnView pawnview, int x, int y) { this.add(pawnview); pawnview.setLocation(x, y); } public void MovePawn(PawnView pawnview, int x, int y) { pawnview.setLocation(x, y); //this.repaint(); } } public class PawnView extends JLabel { public PawnView() { this.setOpaque(false); RepaintManager.currentManager(null).setDoubleBufferingEnabled(true); this.setLayout(null); } } </code></pre> <p>Initially everything looks great (without the MovePawn):</p> <p><a href="http://dl.dropbox.com/u/7438271/1.png" rel="nofollow">http://dl.dropbox.com/u/7438271/1.png</a></p> <p>When I call MovePawn it looks like:</p> <p><a href="http://dl.dropbox.com/u/7438271/2.png" rel="nofollow">http://dl.dropbox.com/u/7438271/2.png</a></p> <p>I tried to call <code>this.revalidate()</code>, <code>this.updateUI()</code>, <code>this.repaint()</code>, <code>this.paintImmediately()</code> in various forms but they all make it worse: the whole JPanel gets a white background.</p> <p>I also tried to override the paintComponent function of the JPanel also without effect.</p> <p>This only occurs on Mac OS X (fully updated) but I experience some problems with repainting in Windows as well.</p> <p>Can anyone please help out?</p>

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