gtk:color-selection-has-opacity-control (object)

object -- a gtk:color-selection widget
has-opacity -- true if the color selector can set the opacity, false otherwise

Accessor of the has-opacity-control slot of the gtk:color-selection class. The gtk:color-selection-has-opacity-control function determines whether the color selector has an opacity control. The (setf gtk:color-selection-has-opacity-control) function sets the color selector to use or not use opacity. The gtk:color-selection-has-opacity-control function is deprecated since version 3.4 and should not be used in newly written code.