GtkPictureset_can_shrink

void
gtk_picture_set_can_shrink (
  GtkPicture* self,
  gboolean can_shrink
)

If set to TRUE, the self can be made smaller than its contents.

The contents will then be scaled down when rendering.

If you want to still force a minimum size manually, consider using gtk_widget_set_size_request().

Also of note is that a similar function for growing does not exist because the grow behavior can be controlled via gtk_widget_set_halign() and gtk_widget_set_valign().

Sets property Gtk.Picture:can-shrink

can_shrink

Type: gboolean

If self can be made smaller than its contents.