gtk:color-button-use-alpha (object)

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

Accessor of the use-alpha slot of the gtk:color-button class. Sets whether or not the color button should use the alpha channel. The gtk:color-button-use-alpha function has been deprecated since version 3.4 and should not be used in newly written code. Use the gtk:color-chooser-use-alpha function instead.