No subject

"
method
  (send a-top-level-window on-close) → void?

Refine this method with augment.
...
"



On May 22, 2013, at 7:14 PM, Stephen Chang wrote:

> I was about to reply with the same answer as Matthias, but with
> define/override instead of define/augment, but I kept getting an
> error. Does it say anywhere in the docs whether a method is declared
> using pubment or public? I couldnt find it.
> 
> On Wed, May 22, 2013 at 7:06 PM, Matthias Felleisen
> <matthias at ccs.neu.edu> wrote:
>> 
>> Here we go:
>> 
>> #lang racket/gui
>> 
>> (define my-frame%
>>  (class frame%
>>    (super-new)
>>    (define/augment (on-close)
>>      (displayln "closing now"))))
>> 
>> (define frame
>>  (new my-frame% [label "on closing"][width 300][height 200]))
>> 
>> (send frame show #t)
>> 
>> 
>> 
>> On May 22, 2013, at 6:55 PM, Zelah Hutchinson wrote:
>> 
>>> From the documentation I gather that I need to augment the on-close method. I do not understand how to do this. Can someone show me a tiny example of how to perform an operation when a window is closed? Thank you.
>>> 
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