<Swing Dev> RFR: 8256713: SwingSet2 : Slider leaves tracks in uiScale=2

[Sergey Bylokhov]

On Tue, 24 Nov 2020 11:00:42 GMT, Prasanta Sadhukhan <psadhukhan at openjdk.org> wrote:

>> The bug in the motif was fixed by the JDK-8032219, the code in the BasicSliderUI is never used by the Metal L&F, I tested that code by the commented out the overridden code in the MetalSliderUI.
>
> If the code in BasicSliderUI is not used by Metal L&F, then, all the more reason to have the clip setting in MetalSliderUI.paintThumb(), no?
> What about nimbus? Why it is not seen in nimbus l&f? 
> I guess only reason I can think of putting the code in BasicL&F is if it's a generic issue and it will solve multiple L&F but it seems the issue only affects MetalL&F.

I have set the clip in the methods which do not draw the thumb properly - draw it outside the bounds of the thumb(it is a limitationGraphics). Only three places were affected, the motif - fixed in JDK-8032219, the old default metal L&F(steel) fixed in this fix in the MetalIconFactory.java. And the code in the BasicSliderUI is not executed by the metal but could be triggered by commenting on some code.

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PR: https://git.openjdk.java.net/jdk/pull/1373