[IronPython] Events

[Michael Foord]

Kasper Tanggaard wrote:
> Hello all,
>
> This is my first post, and I'm not that used to mailinglists, so I do 
> apologize if it goes wrong :). I'm using IronPython as scripting in my 
> application, and I already love it! I would like for my users to write 
> methods which they can hook up as events to the controls already in 
> the application. This works fine, but what if the user messes up? I 
> would like to be able to remove user assigned events from within the 
> application, since I've seen that done with other scripting components 
> back in the good old Delphi days. Is this possible with IronPython? If 
> not, is it possible to do with a piece of Python code which the user 
> can execute if something goes wrong? I hope someone can help me here :)
Hello Kasper,

In IronPython events are added using '+=' :

def onClick(sender, event):
   print 'clicked'

button.Click += onClick

To remove it you do:

button.Click -= onClick

Perhaps you could create your own interface for adding to events, which 
keeps track of everything added and allows you to remove them easily ?

I'm not sure if event handlers are simply collections, there may be a 
away of examining them to see what is in there.

I hope this is helpful.

Michael
http://www.voidspace.org.uk/python/articles.shtml

>
> Kind regards,
>
> Kasper
>
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Michael Foord
Resolver Systems
michael.foord at resolversystems.com

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