[mcclim-devel] Update object of a presentation.

Hi, Let's say I have an object, that is presented with (present ...) on a pane. It is then drawn on the pane with (define-presentation-method present (...) (draw-arrow (start-of object) (end-of object) ...)) The arrow is used to represent the speed and direction of some external object (like the wind) Then the wind speed and direction changes, so the object is updated. Now I need to update the presentation to reflect the changes in the object. How can I update just that object? -- Knut Olav Bøhmer