RFR: 8272229: BasicSplitPaneDivider:oneTouchExpandableChanged() returns leftButton and rightButton as null with GTKLookAndFeel [v3]

[Prasanta Sadhukhan]

On Mon, 27 Sep 2021 13:34:44 GMT, Pankaj Bansal <pbansal at openjdk.org> wrote:

>> The function documentation for oneTouchExpandableChanged states that the function does couple of things, but in reality  it only does those things if the Look and Feel supports the supportsOneTouchButtons. In case the Look and Feel does not support supportsOneTouchButtons, this functions just returns in beginning and does not do anything.
>> This change clarifies the above in function documentation.
>
> Pankaj Bansal has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Changes according to JBS discussion

src/java.desktop/share/classes/javax/swing/plaf/basic/BasicSplitPaneDivider.java line 379:

> 377:     /**
> 378:      * Messaged when the oneTouchExpandable value of the JSplitPane the
> 379:      * divider is contained in changes. Will create the

I guess "value of the current JSplitPane divider" makes more sense. 
Also, I guess leftButton,rightButton wll be created not only if they are null but also when oneTouchExpandable property is set as per code..It might seem to user from current wording that left/right button will be set if they are null even if oneTouchExpandable is not set.

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PR: https://git.openjdk.java.net/jdk/pull/5263