Re: [Pyobjc-dev] method swizzing

[Ronald O. <ron...@ma...>]

On 22 May, 2009, at 18:00, Jason Foreman wrote:

> On Fri, May 22, 2009 at 8:51 AM, Daniel Ashbrook  
> <an...@cc...> wrote:
>> I'm trying to make my program log every event that happens. I'm
>> probably doing it wrong. What I'm trying is:
>>
>> oldIMP = NSResponder.instanceMethodForSelector_('mouseDown:')
>> newIMP = objc.selector(lambda self, e: NSLog('%s: %s'%(self,e)),
>>            selector=oldIMP.selector, signature=oldIMP.signature)
>> objc.classAddMethod(NSResponder, 'mouseDown:', newIMP)
>>
>> This works great - but only for clicking in places on the window that
>> don't already do anything. When I click on a NSButton, for example, I
>> don't get anything logged.
>>
>> I can go through and do the above for every subclass of NSResponder  
>> in
>> my program, but that gets a little bit pesky, especially because it
>> looks like I'd have to separately do it for things like the headers  
>> of
>> NSTableViews and so forth.
>>
>> Is there a better way?
>
> Swizzling sendEvent: in NSApplication might work better, as I think
> everything will go through that before being dispatched to a
> responder.

CoreGraphics has event traps that might also be useful for this.

Ronald
>
>
> Jason
>
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