JTabbedPane in java.awt.Frame, only component on the first tab is displayed

Name: clC74495 Date: 02/25/99


This is a problem with JDK1.1.6 to JDK1.2.
To run this, compile this file, then point the java interpreter at it:
"java TestPanel".

Thanks.
Bill

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;

public class TestPanel extends Frame implements ActionListener {

  public static String TITLE = "Testing Swing";

  JTabbedPane psetsPane = new JTabbedPane();
  JPanel buttonPanel = new JPanel();

  public TestPanel (String tabs[]) {

    for (int i = 0; i < tabs.length; i++) {
      psetsPane.addTab (tabs[i], new JLabel(tabs[i]));
    }
    add(psetsPane, BorderLayout.NORTH);

    JButton testButton = new JButton("Test");
    buttonPanel.add(testButton, BorderLayout.CENTER);
    testButton.setActionCommand("Test");
    testButton.addActionListener(this);

    JButton quitButton = new JButton("Quit");
    buttonPanel.add(quitButton, BorderLayout.CENTER);
    quitButton.setActionCommand("Quit");
    quitButton.addActionListener(this);

    add(buttonPanel, BorderLayout.SOUTH);
    pack();
  }

  public void actionPerformed(ActionEvent e) {

    if (e.getActionCommand().equals("Quit")) {
      System.exit(0);

    } else if (e.getActionCommand().equals("Test")) {
      int tabcount = psetsPane.getTabCount();
      for (int i = 0; i < tabcount; i++) {
JLabel c = (JLabel) psetsPane.getComponentAt(i);
System.out.println("Pane " + i + ": Label="+c+" ("+c.getText()+")");
      }
    };
  }

  public static void main(String args[]) {
    String tabs[] = { "one", "two", "three" };

    TestPanel tp = new TestPanel (tabs);
    tp.setVisible(true);
  }
}
(Review ID: 54534)
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Name: skT88420 Date: 08/06/99


jTabbedPane doesn't always show the correct pane when a tab is
selected. I don't know if I am not using it right, but if I don't
handle stateChanged events myself, the correct pane is not updated
until the window is resized. Regardless of the tab that is selected
the same button is always showing. When I do catch the stateChanged
events and validate and repaint, it behaves correctly except after
resizing the window. After a resize, the next tab selection is
not repainted correctly even though the correct tab is highlighted,
and the stateChanged event is received. This is from jdk 1.2.2
Classic VM (build JDK-1.2.2-W, native threads symcjit)


public class TestTabFrame extends java.awt.Frame {
  public TestTabFrame() {
    initComponents ();
    pack ();
  }
  private void initComponents () {
    addWindowListener (new java.awt.event.WindowAdapter () {
        public void windowClosing (java.awt.event.WindowEvent evt) {
          exitForm (evt);
        }
      }
    );
    setLayout (new java.awt.BorderLayout ());
    jTabbedPane1 = new javax.swing.JTabbedPane ();
    jTabbedPane1.addChangeListener (new javax.swing.event.ChangeListener () {
        public void stateChanged (javax.swing.event.ChangeEvent evt) {
          jTabbedPane1StateChanged (evt);
        }
      }
    );
      jButton1 = new javax.swing.JButton ();
      jButton1.setText ("jButton1");
      jTabbedPane1.addTab ("jButton1", jButton1);

      jButton2 = new javax.swing.JButton ();
      jButton2.setText ("jButton2");
      jTabbedPane1.addTab ("jButton2", jButton2);

    add (jTabbedPane1, "Center");

  }

  private void jTabbedPane1StateChanged (javax.swing.event.ChangeEvent evt) {
    jTabbedPane1.validate();
    jTabbedPane1.repaint();
  }
  private void exitForm(java.awt.event.WindowEvent evt) {
    System.exit (0);
  }


// Variables declaration - do not modify
  private javax.swing.JTabbedPane jTabbedPane1;
  private javax.swing.JButton jButton1;
  private javax.swing.JButton jButton2;
// End of variables declaration


  public static void main(java.lang.String[] args) {
    new TestTabFrame ().show ();
  }

}
(Review ID: 93625)
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