the widget contains a GdkPixbuf.PixbufAnimation
there is no image displayed by the widget
the widget contains a Gio.Icon. This image type was added in GTK+ 2.14
the widget contains a named icon. This image type was added in GTK+ 2.6
the widget contains a Gtk.IconSet
the widget contains a GdkPixbuf.Pixbuf
the widget contains a [stock item name][gtkstock]
the widget contains a cairo.Surface. This image type was added in GTK+ 3.10
Describes the image data representation used by a Gtk.Image. If you want to get the image from the widget, you can only get the currently-stored representation. e.g. if the
gtk_image_get_storage_type()returns #GTK_IMAGE_PIXBUF, then you can callgtk_image_get_pixbuf()but notgtk_image_get_stock(). For empty images, you can request any storage type (call any of the "get" functions), but they will all returnnullvalues.