These links from official GTK+ documentation should help: gtk_widget_show
, gtk_widget_show_all
. In short, show
shows only the widget it is called on, and show_all
, being applied to a container, shows all widgets in this container recursively.
GtkD has very poor and nearly impossible to use API docs, though this seems to be a problem not of GtkD but of D tools. The methods you are referring to are defined on GtkWidget
class, but unfortunately the page about gtk.Widget
is empty (mostly).