RFR: 8356594: JSplitPane loses divider location when reopened via JOptionPane.createDialog() [v4]

[Alexander Zuev]

On Fri, 23 May 2025 08:05:38 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> The issue is when a JSplitPane is embedded inside a lazily-initialized panel, and this panel is displayed using a dialog created via JOptionPane.createDialog(), the divider location is not preserved when reopening the dialog. 
>> This is because when we added support for ComponentOrientation for JSplitPane, even though the left and right compoent is drawn the divider location is not set and was set to initial value and not to the value set by user.
>> Fixed by setting the divider location before rendering the left and right components..
>
> Prasanta Sadhukhan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Set orientation only if changed...add headful in test

Marked as reviewed by kizune (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25294#pullrequestreview-2863725229