Modifications made using this technique take precedence over
style values set via an RC file, however, they will be overridden
if a style is explicitly set on the widget using gtk.widget.Widget.setStyle.
The #GtkRcStyle-struct is designed so each field can either be
set or unset, so it is possible, using this function, to modify some
style values and leave the others unchanged.
Modifies style values on the widget.
Modifications made using this technique take precedence over style values set via an RC file, however, they will be overridden if a style is explicitly set on the widget using gtk.widget.Widget.setStyle. The #GtkRcStyle-struct is designed so each field can either be set or unset, so it is possible, using this function, to modify some style values and leave the others unchanged.
Note that modifications made with this function are not cumulative with previous calls to gtk.widget.Widget.modifyStyle or with such functions as gtk.widget.Widget.modifyFg. If you wish to retain previous values, you must first call gtk.widget.Widget.getModifierStyle, make your modifications to the returned style, then call gtk.widget.Widget.modifyStyle with that style. On the other hand, if you first call gtk.widget.Widget.modifyStyle, subsequent calls to such functions gtk.widget.Widget.modifyFg will have a cumulative effect with the initial modifications.