Warning
gtk_style_properties_register_property has been deprecated since version 3.8 and should not be used in newly-written code. Code should use the default properties provided by CSS.
Registers a property so it can be used in the CSS file format.
This function is the low-level equivalent of
gtk_theming_engine_register_property(), if you are implementing
a theming engine, you want to use that function instead.
Warning gtk_style_properties_register_property has been deprecated since version 3.8 and should not be used in newly-written code. Code should use the default properties provided by CSS. Registers a property so it can be used in the CSS file format. This function is the low-level equivalent of gtk_theming_engine_register_property(), if you are implementing a theming engine, you want to use that function instead.