23 May
2007
23 May
'07
9:06 a.m.
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