Sets the currently displayed value of @self to the string
in @label. Setting an empty label removes the emblem.
Note that this is meant for displaying short labels, such as
roman numbers, or single letters. For roman numbers, consider
using the Unicode characters U+2160 - U+217F. Strings longer
than two characters will likely not be rendered very well.
If this method is called, and a number was already set on the
icon, it will automatically be reset to zero before rendering
the label, i.e. the last method called between
gtk_numerable_icon_set_label() and gtk_numerable_icon_set_count()
has always priority.
Sets the currently displayed value of @self to the string in @label. Setting an empty label removes the emblem.
Note that this is meant for displaying short labels, such as roman numbers, or single letters. For roman numbers, consider using the Unicode characters U+2160 - U+217F. Strings longer than two characters will likely not be rendered very well.
If this method is called, and a number was already set on the icon, it will automatically be reset to zero before rendering the label, i.e. the last method called between gtk_numerable_icon_set_label() and gtk_numerable_icon_set_count() has always priority.