RFR: 4365952: Cannot disable JFileChooser

[Sergey Bylokhov]

On Wed, 7 Dec 2022 11:37:30 GMT, Tejesh R <tr at openjdk.org> wrote:

>> src/java.desktop/share/classes/javax/swing/JFileChooser.java line 420:
>> 
>>> 418: 
>>> 419:     @Override
>>> 420:     public void setEnabled(boolean enabled) {
>> 
>> Can you please check why a similar example using JFrame and button works fine, but the JFileChooser does not work?
>> 
>>         JFrame frame = new JFrame();
>>         JButton button = new JButton("1234567890");
>>         frame.add(button);
>>         frame.setVisible(true);
>>         frame.setEnabled(false);
>>         boolean enabled = button.isEnabled();
>>         System.out.println("enabled = " + enabled);
>
> JFileChooser added to a JFrame similar to the example also works, I guess it's because frame is made inaccessible. But when we try to disable JFileChooser alone, it's not working because we need to disable each sub-component in which JFileChooser is made up of. As per debugging I found out that peer component is showing null for JFileChooser.disable whereas for JFrame the disabling is taken care by peer component in Component class.

Why we cannot make inaccessible JFileChooser same as JFrame? We do not need to mark disable all components inside the frame(I guess jdialog and windows as well). Both are top level components, and probably should work in the same way.

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PR: https://git.openjdk.org/jdk/pull/11553