gtk:progress-bar-fraction (object)

object -- a gtk:progress-bar widget
fraction -- a double float with the fraction of the task that is been completed

Accessor of the fraction slot of the gtk:progress-bar class. The gtk:progress-bar-fraction function returns the current fraction from 0.0 to 1.0 of the task that is been completed. The (setf gtk:progress-bar-fraction) function causes the progress bar to "fill in" the given fraction of the progress bar. The fraction should be between 0.0 and 1.0, inclusive.