Hi, Robert.
This is unknown issue. Please file a new bug at http://bugreport.sun.com/bugreport
Thanks!

On 05.02.2014 19:01, Robert Krüger wrote:
This is a simple test case for you to reproduce the flashing for
opening a Dialog. It's basically the same for JMenus.

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.plaf.ColorUIResource;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestDarkNimbus {

     public static void main(String[] args) throws Exception {

         for(LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()){
             if(info.getName().startsWith("Nimbus")){
                 System.out.println("Setting Look & Feel to " + info.getName());
                 UIManager.setLookAndFeel(info.getClassName());
                 break;
             }
         }

         UIDefaults d = UIManager.getDefaults();
         d.put("control", new ColorUIResource(54, 54, 54));
         d.put("text", new ColorUIResource(214, 214, 214));
         d.put("nimbusBlueGrey", new ColorUIResource(44, 44, 44));
         d.put("nimbusBase", new ColorUIResource(54, 54, 54));
         d.put("nimbusFocus", new Color(71, 85, 101));
         d.put("nimbusLightBackground", new ColorUIResource(54, 54, 54));
         d.put("nimbusSelectionBackground", new ColorUIResource(51, 65, 81));
         d.put("nimbusSelection", new ColorUIResource(51, 65, 81));

         final JFrame frame = new JFrame(TestDarkNimbus.class.getSimpleName());
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         JButton button = new JButton("Test Dialog Flashing");
         button.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 JOptionPane.showMessageDialog(frame.getContentPane(),
"Flash !!!!!!!!!!!!", "Flash demo",
                         JOptionPane.INFORMATION_MESSAGE);
             }
         });
         frame.getContentPane().add(button);
         frame.pack();
         frame.setLocation(500, 500);
         frame.setVisible(true);
     }
}

On Mon, Jan 6, 2014 at 6:49 PM, Robert Krüger <krue...@lesspain.de> wrote:
Hi,

we are using a customized Nimbus L&F (the customization is mostly
color changes) with dark backgrounds. Since we migrated our product
from Apple JDK 6 to OpenJDK 8 each JMenu or JDialog opens and first
draws a white rectangle that is then quickly replaced by the real
content, which has a rather unprofessional feel.

Has anyone had a similar problem and maybe a workaround other than not
having a dark background? Is there a known Jira issue I can follow?

I am currently running build 121 in development on Mac OS 10.8.

Thanks,

Robert


--
Best regards, Sergey.

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