I was wondering why you did not use morphs for
mondrian since I have the
impression that for drag and drop
alex is reinventing the morph event dispatch loop.
I don't know exactly the current situation, but when I last worked on
Mondrian for Squeak it had drag and drop. These were a couple of lines
of code built on top of the basic mouse events. Essentially this is
the same as when you implement drag and drop in the HTML DOM tree.
Morphic is way too slow, way to wasteful with memory and too platform
dependent for something like Mondrian. One of the reasons why the
original Mondrian is not portable, is because it is tightly connected
with the graphic system of VisualWorks.
Lukas
--
Lukas Renggli
http://www.lukas-renggli.ch