Sorry I felt a bit dumb at this point, so I though I'll try all
combinations. Following code is executed on a button press from a custom
widget derived from Gtk::ToggleButton.
int nValue;
Glib::RefPtr<Gtk::StyleContext> refStyleContext = get_style_context();
refStyleContext->get_property("color", nValue);
refStyleContext->get_property("css-color", nValue);
refStyleContext->get_style_property("color", nValue);
refStyleContext->get_style_property("css-color", nValue);
get_property("color", nValue);
get_property("css-color", nValue);
All six lines threw warnings as below.
*(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
g_object_get_is_valid_property: object class 'GtkStyleContext' has no
property named 'color'(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
g_object_get_is_valid_property: object class 'GtkStyleContext' has no
property named 'css-color'(TV_UI:21972): Gtk-WARNING **: 15:49:20.480:
../../../../gtk/gtkstylecontext.c:1796: widget class
'gtkmm__GtkToggleButton' has no style property named 'color'(TV_UI:21972):
Gtk-WARNING **: 15:49:20.480: ../../../../gtk/gtkstylecontext.c:1796:
widget class 'gtkmm__GtkToggleButton' has no style property named
'css-color'(TV_UI:21972): GLib-GObject-WARNING **: 15:49:20.480:
g_object_get_is_valid_property: object class 'gtkmm__GtkToggleButton' has
no property named 'color'(TV_UI:21972): GLib-GObject-WARNING **:
15:49:20.480: g_object_get_is_valid_property: object class
'gtkmm__GtkToggleButton' has no property named 'css-color'*
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