gtk:color-button-alpha (object)

object -- a gtk:color-button widget
alpha -- an integer between 0 and 65535

Accessor of the alpha slot of the gtk:color-button class. The gtk:color-button-alpha function returns the current alpha value. The (setf gtk:color-button-alpha) function sets the current opacity to be alpha. The gtk:color-button-alpha function has been deprecated since version 3.4 and should not be used in newly written code. Use the gtk:color-chooser-rgba function instead.