Eclipse on Fedora (and as I read it, also on Ubuntu) has now got a problem with colors. Specifically, when one hovers over a function to obtain the calling sequence, a pop up appears to provide this information but the background of the pop-up is black, which makes the content unreadable. This is relatively new, though I’m not sure whether it was with the change to Eclipse Neon or earlier, or the change to Fedora 24.<\/p>\n
It turns out this is not a setting in eclipse, although I wasted quite a lot of time looking for it. This ends up being a system setting, associated with gtk, the graphical toolkit. If one starts eclipse with<\/p>\n
export SWT_GTK3=0;eclipse<\/p>\n
which starts eclipse with gtk 2.0, instead of gtk 3.0, the problem goes away, the background of the pop-ups becomes a nice cream color.<\/p>\n
The settings we are using are set in the theme one chooses, the default theme being Adwaita. The themes are kept in \/usr\/share\/themes. I tried simply changing to a different theme (TraditionalOk) but the setting affecting this did not change. So I resorted to force.<\/p>\n
In \/usr\/share\/themes\/TraditionalOk there are directories for gtk-2.0 and gtk-3.0. Within gtk-3.0 I changed the file gtk-widgets.css, specifically, I changed the setting in the tooltip section to background-color #f5f5b5; Previously the value was “@theme_tooltip_bg_color;” and as I read it, that define ought to have the value #f5f5b5. But something is wrong, and the setting is disruptd. But forcing it this way, it seems to work.<\/p>\n","protected":false},"excerpt":{"rendered":"
Eclipse on Fedora (and as I read it, also on Ubuntu) has now got a problem with colors. Specifically, when one hovers over a function to obtain the calling sequence, a pop up appears to provide this information but the background of the pop-up is black, which makes the content unreadable. This is relatively new, … Continue reading GTK Tooltips and Eclipse<\/span>