Extracted from Pike v8.0 release 276 as of 2016-07-30.
   

Method GTK2.ColorSelection()->set_previous_alpha()


Method set_previous_alpha

GTK2.ColorSelection set_previous_alpha(int alpha)

Description

Sets the 'previous' alpha to be alpha. This function should be called with some hesitation, as it might seem confusing to have that alpha change.