Name: krT82822 Date: 07/03/99


[win32-specific, as of JDK 1.2.2 RC1 --kevin.ryan@eng, 7/3/99]
(see also bug # 4223366)
[Filed against 1.2 FCS, but have revised the version # to 1.2.2, since problem still exists in 1.2.2 RC1]

When I disable a JFrame with setEnabled(false)
only MouseEvents are supressed. The keyboard still works.

In the example below, press the 'disable'-button to disable
the JFrame. After that you can still set the focus on any of
its components by using the tab-key.

On the component with the focus the keyboard still works normaly:
you can enter text in the JTextField,
press the button using the spacebar.

You can also use the mnemonics in a disabled frame.

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

// A test for disabling a JFrame
// The setEnabled(false) does not block keyboard-Events
public class TestFrame extends JFrame {
        private JButton enable = new JButton("enable");
        private JButton disable = new JButton("disable");
        private JTextField text = new JTextField();

        public TestFrame() {
                enable.addActionListener( new ActionListener() {
                        public void actionPerformed(ActionEvent e) {
                                TestFrame.this.setEnabled(true);
                        }
                });
                enable.setMnemonic('e');

                disable.addActionListener( new ActionListener() {
                        public void actionPerformed(ActionEvent e) {
                                TestFrame.this.setEnabled(false);
                        }
                });

                getContentPane().add(enable, BorderLayout.NORTH);
                getContentPane().add(text, BorderLayout.CENTER);
                getContentPane().add(disable, BorderLayout.SOUTH);
        }

        public static void main(String[] args) {
                TestFrame testFrame = new TestFrame();
                testFrame.pack();
                testFrame.setVisible(true);
        }
}


It looks like a bug in the peer-class of the frame.
(Review ID: 53599)
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