Hello everybody, I know in the GTK+3 theming engine a theme can define a light variant and a dark variant. Is it possible, in an application, to know which variant is currently used, and/or specify which widget in the application uses which variant?
Here’s the wider context: Mozilla Firefox uses GTK+3 for some of its widgets. However, lately, there is a push for custom widgets, on the grounds that GTK widgets cause problems for the users. A couple examples: * The user has a dark theme, which means normal input boxes use light text on dark background. Suppose that input box is used on a web page developed by an ignorant person who has never seen a dark theme, and has specified a dark text color for the input box, without also specifying a background. Now the user cannot see the text. One workaround often suggested in the bug tracker is to always run Firefox with a light theme variant, but a better solution would be to force light theme inputs in web pages, at least until much of the Web catches on to dark themes. * Firefox has Developer Tools, which allow the user to choose a light or a dark theme. This poses a problem: If the user has a light GTK theme but selects the dark DevTools theme, the GTK scrollbar would clash with the overall DevTools UI. Same thing happens in the reverse situation. Here is an example: https://bug1471163.bmoattachments.org/attachment.cgi?id=9014444 [disclaimer: I do not know what that theme is.] This has led Firefox to develop a substitute scroll bar, which is inferior to the GTK scroll bar in every way except the ability to control its colors from the application. In the 64 Nightly version, in place of a scrollbar, Firefox DevTools display a flat rectangular gray thumb in a flat rectangular other-shade-of-gray trough. What would be the Correct Way to solve these problems, from a GTK developer’s point of view? (Except the obvious “Use GTK widgets as much as possible, and never allow web content to override GTK widgets’ colors”; that’s not gonna fly for political reasons.) _______________________________________________ gtk-app-devel-list mailing list firstname.lastname@example.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list