Created attachment 139159 [details] ex hexchat SUMMARY GTK on KDE not work with some softwares buttons, in xfce work normaly. STEPS TO REPRODUCE 1. Appearance / Application Style / Adwaita Dark or any dark theme 2. Appearance / Application Style / Gnome/GTK Application Style / Adwaita Dark or any dark theme 3. Run app like Netbeans(GTK theme), Hexchat, Leafpad and etc... OBSERVED RESULT Buttons don't use gtk theme EXPECTED RESULT I expected result same as xfce, like this attachment fold xfce. SOFTWARE/OS VERSIONS Windows: N/A macOS: N/A Linux/KDE Plasma: Fedora 34 x64 (available in About System) KDE Plasma Version: 5.21.5 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION If I remember, when select GTK Gnome Style on early version I can select theme for gtk2 and gtk3, but this option is not allowed like pic KDEStyle.png. I tried some tricks, but not results. Others app like idea intellij, eclipse, qt-creator work as fine. Sorry my bad english.
Created attachment 139160 [details] xfce
Those are GTK 2 apps, and Breeze GTK doesn't support GTK 2 apps anymore. It was not maintainable for us to do so. GTK2 is like 12 years old; it's really time for them to upgrade. I mean heck, GTK 4 was just released this year!
(In reply to Nate Graham from comment #2) > Those are GTK 2 apps, and Breeze GTK doesn't support GTK 2 apps anymore. It > was not maintainable for us to do so. GTK2 is like 12 years old; it's really > time for them to upgrade. I mean heck, GTK 4 was just released this year! Thx for reply.