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Date: Wed, 15 Oct 2008 11:32:00 -0000
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Subject: Problem with AWT/Swing code
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From: "ffileppo" <ffileppo@libero.it>
To: "java" <java@gcc.gnu.org>
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Hi everyone,

I'm doing some testing with AWT/Swing applications compiled with gcj 4.4 (w=
hich is using classpath 0.97.2).

I'm having some troubles with the following code; it does not show
the JComponent inside the JFrame (I've tried both on x86 and arm).

This code runs fine if compiled with OpenJDK, so I guess that this issue is=
 more related to gcj rather then classpath.

Any thoughts or ideas?

Thank you

Francesco

Code:

import java.awt.BorderLayout;

import javax.swing.DefaultListModel;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.SwingUtilities;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class MainPanel extends JPanel implements ListSelectionListener {

  static final int NUM_ROWS =3D 500;

  JList list;
  JLabel lblSelection;
  DefaultListModel listModel;

  int startRow =3D 0;
  long startTime =3D 0;

  Runnable r =3D new Runnable() {
    public void run() {
      long deltaTime =3D System.currentTimeMillis() - startTime;
      for (int i=3DstartRow; i<NUM_ROWS; i++) {
        listModel.set(i, ""+deltaTime);
      }

      startRow++;
      startTime =3D System.currentTimeMillis();

      SwingUtilities.invokeLater(r);

    }
  };

  public MainPanel() {
    super(new BorderLayout());
    listModel =3D new DefaultListModel();
    for (int i=3D0; i<NUM_ROWS; i++) {
      listModel.addElement("Element "+i);
    }

    //Create the list and put it in a scroll pane.
    list =3D new JList(listModel);
    list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    list.setSelectedIndex(0);
    list.addListSelectionListener(this);
    list.setVisibleRowCount(5);

    JScrollPane listScrollPane =3D new JScrollPane(list);

    lblSelection =3D new JLabel(" ");

    add(lblSelection, BorderLayout.SOUTH);
    add(listScrollPane, BorderLayout.CENTER);

    // t.start();
    startTime =3D System.currentTimeMillis();
    SwingUtilities.invokeLater(r);
  }

  public void valueChanged(ListSelectionEvent e) {
    if (e.getValueIsAdjusting() =3D=3D false) {
      if (list.getSelectedIndex() =3D=3D -1) {
        //No selection
        lblSelection.setText("");
      } else {
        //Selection
        lblSelection.setText("Item selected: "+list.getSelectedIndex());
      }
    }
  }

  public static void main(String[] args) {
    //Create and set up the window.
    JFrame frame =3D new JFrame("TestUI #1");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JComponent newContentPane =3D new MainPanel();
    newContentPane.setOpaque(true); //content panes must be opaque
    frame.setContentPane(newContentPane);

    //Display the window.
    frame.setBounds(10, 10, 500, 400);
    frame.setVisible(true);
  }
}