Thank you for taking the time to report this bug and helping to make Ubuntu better. However, I am closing it because the bug has been fixed in the latest development version of Ubuntu.
This is a significant bug in Ubuntu. If you need a fix for the bug in previous versions of Ubuntu, please perform as much as possible of the SRU Procedure [1] to bring the need to a developer's attention. [1]: https://wiki.ubuntu.com/StableReleaseUpdates#Procedure ** Changed in: glibmm2.4 (Ubuntu) Importance: Undecided => Low ** Changed in: glibmm2.4 (Ubuntu) Status: New => Fix Committed -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to glibmm2.4 in Ubuntu. https://bugs.launchpad.net/bugs/1846699 Title: Missing mechanism in Glibmm that prevents the support of some themes (CSS) in Gtkmm Status in glibmm2.4 package in Ubuntu: Fix Committed Bug description: In GTK+ 3.20 the theming mechanics was heavily changed. https://developer.gnome.org/gtk3/stable/ch32s10.html One of the major changes was the use of element names much more than style classes. For this the function gtk_widget_class_set_css_name() was added to t he API and used to assign the element names. However, this was not added in GTKmm, making impossible to assign element names in custom widget, and no automatically assignment was developed in GTKmm's Widget class in order to be able to identify widget classes in the theming system (CSS). The problem was discussed and tracked up to Glibmm in GNOME bug tracking system: https://gitlab.gnome.org/GNOME/gtkmm/issues/17 https://gitlab.gnome.org/GNOME/glibmm/issues/33 The issues are due to the lack of the mechanism to call gtk_widget_class_set_css_name() function in the instance init function. This was solved in Glibmm2.4 2.60, however Ubuntu is still behind this version and it's affecting some of our products. We have applied a patch to the current version (2.56) of Glibmm2.4 in Ubuntu 18.04 successfully, but I would like to ask you to consider upgrading the version of Glibmm in the official repository or apply the patch. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibmm2.4/+bug/1846699/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
