RFR: 8311031: JTable header border vertical lines are not aligned with data grid lines

[Tejesh R]

On Tue, 4 Jul 2023 12:55:40 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> > > That gap is caused because of alignment miss-match between vertical lines of header border and data grid lines. To be specific the header vertical line is slightly left (around a pixel) than data grid line.
> > 
> > 
> > Is it require to address?
> 
> I'd rather say ‘yes’. Since you're trying to improve border rendering, it's better to fix this inconsistency too.
> 
> But to get pixel-perfect rendering, you may need to remove the scale transform.

I'm not sure if it is a bug, the gap is because of white lines drawn for each header cell (bottom-left till top-left and then to to-right for each header cell). Kind of shade effect.

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PR Comment: https://git.openjdk.org/jdk/pull/14766#issuecomment-1621299445