Re: Need to find which window is active

• Subject: Re: Need to find which window is active
• From: Modesitt Software <email@hidden>
• Date: Tue, 11 Nov 2003 16:20:48 -0800

On Nov 11, 2003, at 3:40 PM, Modesitt Software wrote:

I put together the code, but every time it runs, AXObserverAddNotification always returns the error kAXErrorCannotComplete. I've tried several modifications, but nothing changes. Is that most likely because of a code error my part, or is it because these calls are still in "draft" mode?

The calls definitely work; I've written code myself that uses them.

ProcessSerialNumber psn = UProcess::GetPSN( "\pmail");
pid_t pid = psn.lowLongOfPSN;

Have you verified that the PSN that you're getting back is valid?

I'd suggest using GetProcessPID here instead of constructing the pid_t from the PSN.

AXUIElementRef elementRef = ::AXUIElementCreateApplication (pid);

AXObserverRef observerRef;
AXError err = ::AXObserverCreate ( pid,
(*(AXObserverCallback)MyObserverCallback),
&observerRef);

err = ::AXObserverAddNotification ( observerRef,
elementRef,
kAXMainWindowChangedNotification,
nil );
// err always returns kAXErrorCannotComplete

This part looks OK, except I'm not sure you need to dereference the MyObserverCallback parameter to AXObserverCreate. But I wouldn't think that would cause kAXErrorCannotComplete to be returned later.

-eric

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  • Re: Need to find which window is active
    • From: Eric Schlegel <email@hidden>

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