Adds a region to context, so posterior calls to
gtk.style_context.StyleContext.get or any of the gtk_render_*()
functions will make use of this new region for styling.
In the CSS file format, a #GtkTreeView defining a “row”
region, would be matched by:
treeview row { ... }
Pseudo-classes are used for matching flags, so the two
following rules:
Adds a region to context, so posterior calls to gtk.style_context.StyleContext.get or any of the gtk_render_*() functions will make use of this new region for styling.
In the CSS file format, a #GtkTreeView defining a “row” region, would be matched by:
treeview row { ... }Pseudo-classes are used for matching flags, so the two following rules:
treeview row:nth-child(even) { ... } treeview row:nth-child(odd) { ... }would apply to even and odd rows, respectively.
Region names must only contain lowercase letters and “-”, starting always with a lowercase letter.