gtk-color-chooser-use-alpha (object)

object -- a gtk-color-chooser widget
use-alpha -- true if the color chooser should use alpha channel, false if not

Accessor of the use-alpha slot of the gtk-color-chooser class.

The slot access function gtk-color-chooser-use-alpha returns whether the color chooser shows the alpha channel. The slot access function (setf gtk-color-chooser-use-alpha) sets whether or not the color chooser should use the alpha channel.