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Re: setting application and window focus

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Re: setting application and window focus

Subject: Re: setting application and window focus
From: Keith Alperin <email@hidden>
Date: Wed, 29 Mar 2006 12:36:56 -0600

Thanks jl. Unfortunately, this doesn't seem to do what i want. Focus still leaves one application and goes to my panel (good) but then when i dismiss my panel, focus does not go back to the previous application (bad). I'm guessing that this is because my panel is from another application. In my case, my panel is going to be modal, and the use case is such that you would want focus to return to the previous application regardless of what else is happening on the system so i think that i'm going to go with the Get/SetFrontProcess mechanism.

Thanks again!
Keith


On Mar 29, 2006, at 12:14 PM, John Louch wrote:

Generally this is a bad idea. The problem is that the front most process might have changed since your stored away the front most psn.

What you should try to do is never come to the front. In cocoa you get this somewhat for free by being a nonactivating panel. There might be a solution for carbon as well.

Thanks,
jl

Thanks to Tom Bunch and Ian Archer for supplying this answer.  It
worked like a charm.

Yes, some of those calls were failing, and even the ones that
succeeded didn't succeed in focusing on the correct app.

Cheers!
Keith

On Mar 29, 2006, at 11:05 AM, Tom Bunch wrote:

I realize that you may have omitted code, but some of these should
be failing with kAXErrorIllegalArgument.  Are you checking theErr?

That said, I don't actually know if there is an Accessibility API
that lets you set the focused app.  I would try

extern OSErr GetFrontProcess(ProcessSerialNumber * PSN);
extern OSErr SetFrontProcess(ProcessSerialNumber * PSN);

-Tom

On Mar 29, 2006, at 8:41 AM, Keith Alperin wrote:

Greetings Accessibility-devs!

I have a cocoa agent application (one that does not show up in the
dock, though it can come forward and present a UI).  I use a hot
key to bring up a window from my agent app and then do something.
When it is done, i hide the window and want to return focus the
previously focused window.  I keep AXUIElementRefs of  the focused
Application, window and even kAXFocusedUIElementAttribute from
before i change focus to my agent app.  I've tried a number of
ways to return focus to the original window, but none of them seem
to work:

theErr = AXUIElementSetAttributeValue
(previouslyFocusedApplication, kAXMainAttribute, kCFBooleanTrue);
theErr = AXUIElementSetAttributeValue
(previouslyFocusedApplication, kAXFocusedApplicationAttribute,
kCFBooleanTrue);
theErr = AXUIElementSetAttributeValue(previouslyFocusedWindow,
kAXFocusedWindowAttribute, kCFBooleanTrue);
theErr = AXUIElementSetAttributeValue(previouslyFocusedWindow,
kAXMainAttribute, kCFBooleanTrue);
theErr = AXUIElementSetAttributeValue(previouslyFocusedWindow,
kAXFocusedAttribute, kCFBooleanTrue);
theErr = AXUIElementSetAttributeValue
(previouslyFocusedApplication, kAXFocusedUIElementAttribute,
previouslyFocusedElement);

after each of these, i check what the
kAXFocusedApplicationAttribute of the system wide element is and
it's always my agent application.  I'm not that experienced with
the Accessibility API, is there a simple way to set the focus of a
specific application and window?

Many thanks,
Keith R. Alperin
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References:  
  >Re: setting application and window focus (From: John Louch <email@hidden>)




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