New Light theme - horizontal row lines are not visible in Tree control on Mac

[Phillipus]

• I verified I can reproduce this issue against latest Integration Build of Eclipse SDK

If a Tree control has multiple columns and lines visible (Tree#setLinesVisible(true)) it is helpful to have horizontal row lines visible as can be seen in Eclipse's Problems view. On Windows these lines are displayed as horizontal grey lines and, on Mac, as alternating row colors.

However, on Mac, with the new light theme, these alternating row colors are not visible.

Mac Tree on standard light theme:

Mac tree with new light theme:

Compare the above with Windows using the new light theme:

Whereas Windows has the horizontal row lines visible in the new theme, Mac no longer has the equivalent alternating row lines which can be helpful for accessibility.

Note - this is a follow on from #2171 where that issue concerned the Table control and I mistakenly regarded the Problems view as containing a Table not a Tree.

• I understand reporting an issue to this OSS project does not mandate anyone to fix it. Other contributors may consider the issue, or not, at their own convenience. The most efficient way to get it fixed is that I fix it myself and contribute it back as a good quality patch to the project.

[BeckerWdf]

This should be fixed with #2404
Pls. reopen if you still see the issue.