Created attachment 1516026 [details]
Picture showing corrupted fonts and tabs
Description of problem:
I installed Netbeans 8.2 in RHEL 8 beta and noticed that the GTK+ theme didn't work as expected. Tabs and fonts on docked windows (left and bottom) were sized incorrectly, and the fonts overall were not quite right. Only the GTK+ theme is broken, all the default themes work fine. See attached pic.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install java & Netbeans 8.2
2. Select the GTK+ theme
Tabs and fonts broken on docked windows using the GTK+ theme.
GTK+ theme should work like the other themes.
The GTK+ theme works fine on CentOS 7.5 & 7.6, and works on Fedora 28 & 29.
I marked this as low severity because right now it may only be a problem if you install 3rd party apps. However I can see this becoming a bigger issue when EPEL becomes available for RHEL 8 and people start installing IDEs and so on.
I replaced Oracle's NetBeans 8.2 with the latest Apache "incubating" NetBeans 10.0 and I am no longer seeing this issue with the GTK+ theme.
netbeans is not a GTK application. There is very little GTK can do to address the problem that occurs when 3rd party applications are using parts of GTK theme information for their own rendering.