The code was unintentionally appending to the
existing child transform, leading to ever-moving
children when you call gtk_fixed_put.
g_return_if_fail (GTK_IS_FIXED_LAYOUT_CHILD (child));
- child->transform = gsk_transform_transform (child->transform, transform);
+ gsk_transform_unref (child->transform);
+ child->transform = gsk_transform_ref (transform);
layout = gtk_layout_child_get_layout_manager (GTK_LAYOUT_CHILD (child));
gtk_layout_manager_layout_changed (layout);