On Tue, 20 Aug 2024 11:30:06 GMT, Prasanta Sadhukhan <[email protected]> 
wrote:

>> Issue is
>> BasicScrollBarUI.ArrowButtonListener starts a timer in mousePressed(), and 
>> stops it in mouseReleased(). If the frame containing the scrollbar is 
>> disabled between the MOUSE_PRESSED and the MOUSE_RELEASED events, the 
>> mouseReleased() method is never called. If the frame is then re-enabled, the 
>> still-running timer causes it to scroll all the way to the end.
>> Fix is to check if 
>> [ArrowButtonListener.handledEvent](https://github.com/openjdk/jdk/blame/ee839b7f0ebe471d3877cddd2c87019ccb8ee5ae/src/java.desktop/share/classes/javax/swing/plaf/basic/BasicScrollBarUI.java#L1567)
>>  is still set when ActionEvent is processed then stop the timer and reset 
>> this variable.
>> 
>> CI testing is green and also SwingSet2 JScrollPane scrolling with this 
>> modification..
>
> Prasanta Sadhukhan has updated the pull request incrementally with one 
> additional commit since the last revision:
> 
>   Sort imports

Ran the test and verified the latest fix on different platforms (mac, windows 
and linux). It works as expected and looks good to me now.

-------------

Marked as reviewed by abhiscxk (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20346#pullrequestreview-2249722192

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