When I call setText("Fri\n9/07") on a TableColumn, it looks nice in Linux, showing two lines in the header. However, on Mac OS X, the header's size doesn't change, and I see the bottom half of the first line and the upper half of the second. Is there a way to make header high enough on Mac and Windows?
When multi-line text is set in the header the behavior is platform dependent. Not all platforms allow multiple lines in the header. Multiple lines are shown on Linux but on Windows multiples lines are shown as single line text.
There is a feature request for this in bugzilla - https://bugs.eclipse.org/bugs/show_bug.cgi?id=97077.
You can add yourself and vote for the bug if you are interested in the feature.