[PythonCAD] Problem with entity transfer code and other news

[Art Haas]

On Mon, Mar 13, 2006 at 12:54:55PM -0600, Art Haas wrote:
> Hi.
> 
> I've been trying to fix the problem in transferring entities between
> layers where Dimension entities become invalid, and it seems like the
> change I made to the delObject() Layer method is a poor approach. The
> method was changed so that deleted objects do not have to have
> a finish() method invocation if delObject() is called with an
> optional 'False' argument, leaving the entity with whatever values/users
> it had while disconnecting from the storing layer. The trouble is when
> doing an undo/redo operation, delObject() is called without the optional
> argument, so finish() gets invoked, and things get messed up.
> 
> I have a couple of ideas on how to fix this, and I'll be testing them
> over the next few days. When I hit on a solution I like I'll send a
> message out to the list.

I've tried a couple of ideas, but things just aren't working out. The
problem always gets sticky when trying to handle undo/redo operations
for the Layer 'added_child' and 'removed_child' messages. Presently
it looks like I'll revert most of the changes to the 'transfer.py'
file and make some simplifications to the restored code, but I'm still
not giving up on finding a better solution based on the new code.

Art
-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822