RFR: 8311031: JTable header border vertical lines are not aligned with data grid lines
Tejesh R
tr at openjdk.org
Tue Jul 4 11:37:57 UTC 2023
On Tue, 4 Jul 2023 11:01:27 GMT, Tejesh R <tr at openjdk.org> wrote:
> The header border uses `g.drawLine` whereas the JTable data grid lines uses `SwingUtilities2.drawVLine` and `SwingUtilities2.drawHLine` to draw horizontal and vertical lines. The SwingUtilities2 uses `Graphics.fillRect` which contributes to the difference between the position of these two lines which happens/visible at higher ui scaling (difference in alignment between vertical lines of these two). The fix propose to use the same methods for metal L&F of JTable header border paint.
> CI testing shows green.
>
> 
> 
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> There is a small gap between the horizontal and vertical line in size column (above 1 or Green) whereas grid lines don't have any gap.
>
> Is it correct?
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.
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PR Comment: https://git.openjdk.org/jdk/pull/14766#issuecomment-1620081745
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