GtkProgress
can be in one of two different modes: percentage
mode (the default) and activity mode. In activity mode, the
progress is simply indicated as activity rather than as a percentage
complete.
WARNING: gtk_progress_set_activity_mode
is deprecated and should not be used in newly-written code.
gtkProgressSetActivityMode(object, activity.mode)
object
GtkProgress
.activity.mode
TRUE
for activity mode.