Re: [Visualpython-users] deleting scenes

[Guy K. K. <g....@ma...>]

Hi Bruce,

thanks for the explanations, I'll give it a try.

I think whenever I set the visual.scene.visible = False my program stopped. It 
was a very strange behaviour. It was like there's still an event loop or so 
going from the GUI, and the only way to terminate the process was through an 
explicit kill. I need to have a look at it again.

On Mon, 29 Jun 2009 03:59:02 Bruce Sherwood wrote:
> I'm worried that something's apparently wrong with the del statement,
> which should have gotten rid of the first display completely. I'll look
> into that. Setting all the objects to invisible before making the
> display invisible doesn't change anything.

I've seen things like that before, wrapping native code in Python. I believe 
it's got more to do with the C side of things rather than the Python side. 
Python's del only acts on things that live in the Python world, and it does 
not/cannot call memory frees, destructors, etc. in the shared library's native 
code world. What I've done on ctypes based projects before was to add cleaning 
code to the Python object's __del__ method that performs some native code 
cleaning on deleting the Python object.

Guy

-- 
Guy K. Kloss
Institute of Information and Mathematical Sciences
Te Kura Pūtaiao o Mōhiohio me Pāngarau
Massey University, Albany (North Shore City, Auckland)
473 State Highway 17, Gate 1, Mailroom, Quad B Building
voice: +64 9 414-0800 ext. 9585   fax: +64 9 441-8181
G....@ma... http://www.massey.ac.nz/~gkloss