Re: [changeset] - improve clf() compatibility

[David Bateman]

John W. Eaton wrote:
> On 22-Oct-2008, David Bateman wrote:
>
> | 2) The correct solution is to have a means of removing callback 
> | functions in the deletefcn of plotyy. So we need a dellistener function 
> | that corresponds to the existing addlistener function.. I'm working on a 
> | patch along these lines.
>
> The Matlab docs indicate that calling delete on the handle returned by
> addlistener should delete the object remove the listener function.  It
> looks like Matlab creates a "handle class object" to represent the
> listener function.  I know, we don't have "handle class objects".
> Maybe we need to fake something for now, but it seems we should at
> least use the same interface if possible instead of introducing a new
> dellistener function.
>
> jwe
>
>   
In fact the problem is that "newplot" calls __go_axis__init__ which 
reinitializes the axis but keeps the listeners. Deleting the axis does 
correctly delete the listener functions. From that point there are two 
choices, make __go_axis_init__ (ca, "replace") search all of the axis 
properties for listeners are remove them.. Or alternatively, delete by 
hand the callbacks elsewhere.. It probably makes sense to do both..

D.


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