set_theme_variant

Description:

public void set_theme_variant (string variant)

GTK applications can request a dark theme variant.

In order to make other applications - namely window managers using GTK for themeing - aware of this choice, GTK uses this function to export the requested theme variant as _GTK_THEME_VARIANT property on toplevel surfaces.

Note that this property is automatically updated by GTK, so this function should only be used by applications which do not use GTK to create toplevel surfaces.

Parameters:

this	a `GdkSurface`
variant	the theme variant to export