Creates a new gtk.AppChooserDialog for the provided content type, to allow the user to select an application for it.
a gtk.Window, or NULL
flags for this dialog
a content type string
a newly created gtk.AppChooserDialog
ConstructionException GTK+ fails to create the object.
3.0
Creates a new gtk.AppChooserDialog for the provided content type, to allow the user to select an application for it.