Re: modifier key query

2008-12-31 Thread Sean McBride
Wesley Smith (wesley.h...@gmail.com) on 2008-12-26 3:04 AM said:

Is there a way to know if a modifier key (shift, ctrl, option, cmd,
etc) is pressed?  Obviously, there's this:
NSUInteger modifierFlags = [theEvent modifierFlags];

but what if you need to know this information independent of an
NSEvent?  Anyway to get it?  So far I haven't seen anything
encouraging in the docs.

There's GetCurrentKeyModifiers(), which is superbly documented in
CarbonEventsCore.h.  But sticking with NSEvent, if you can, if probably
better.

Sean


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Re: modifier key query

2008-12-31 Thread Ricky Sharp


On Dec 31, 2008, at 11:36 AM, Sean McBride wrote:


Wesley Smith (wesley.h...@gmail.com) on 2008-12-26 3:04 AM said:


Is there a way to know if a modifier key (shift, ctrl, option, cmd,
etc) is pressed?  Obviously, there's this:
NSUInteger modifierFlags = [theEvent modifierFlags];

but what if you need to know this information independent of an
NSEvent?  Anyway to get it?  So far I haven't seen anything
encouraging in the docs.


There's GetCurrentKeyModifiers(), which is superbly documented in
CarbonEventsCore.h.  But sticking with NSEvent, if you can, if  
probably

better.



There's really nothing wrong with relying upon certain Carbon APIs.   
If or when Apple ever removes Carbon, I foresee APIs moving to new  
homes.


It's not like the current system has two shared libraries (Carbon/ 
Cocoa) and when Carbon goes, all APIs go with it.  In many cases,  
Carbon APIs are just wrappers over lower-level code.


If there are key pieces of functionality that you can do in Carbon,  
but not Cocoa, definitely file enhancement requests to add those APIs  
to Cocoa.

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Re: modifier key query

2008-12-31 Thread Sean McBride
Ricky Sharp (rsh...@mac.com) on 2008-12-31 1:21 PM said:

 Is there a way to know if a modifier key (shift, ctrl, option, cmd,
 etc) is pressed?  Obviously, there's this:
 NSUInteger modifierFlags = [theEvent modifierFlags];

 but what if you need to know this information independent of an
 NSEvent?  Anyway to get it?  So far I haven't seen anything
 encouraging in the docs.

 There's GetCurrentKeyModifiers(), which is superbly documented in
 CarbonEventsCore.h.  But sticking with NSEvent, if you can, if
 probably
 better.

There's really nothing wrong with relying upon certain Carbon APIs.
If or when Apple ever removes Carbon, I foresee APIs moving to new
homes.

Sticking with NSEvent is better not because GetCurrentKeyModifiers() is
Carbon, but because of the nature of GetCurrentKeyModifiers().  Please
read the excellent comments in the header that I mentioned.  The OP was
vague on his goals/needs, so GetCurrentKeyModifiers() maybe appropriate.

Sean


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modifier key query

2008-12-26 Thread Wesley Smith
Is there a way to know if a modifier key (shift, ctrl, option, cmd,
etc) is pressed?  Obviously, there's this:
NSUInteger modifierFlags = [theEvent modifierFlags];

but what if you need to know this information independent of an
NSEvent?  Anyway to get it?  So far I haven't seen anything
encouraging in the docs.

thanks,
wes
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Re: modifier key query

2008-12-26 Thread Ken Thomases

On Dec 26, 2008, at 2:04 AM, Wesley Smith wrote:


Is there a way to know if a modifier key (shift, ctrl, option, cmd,
etc) is pressed?  Obviously, there's this:
NSUInteger modifierFlags = [theEvent modifierFlags];

but what if you need to know this information independent of an
NSEvent?  Anyway to get it?


You don't get it independently of NSEvent, you get a specific event  
whenever the current set of modifiers changes, an event of type  
NSFlagsChanged.


Given that you are informed with an event each time the modifiers  
change, I'm not sure why you want to know this information  
independent of an NSEvent.


Regards,
Ken

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Re: modifier key query

2008-12-26 Thread Wesley Smith

 Given that you are informed with an event each time the modifiers change,
 I'm not sure why you want to know this information independent of an
 NSEvent.


Mainly because I'd like to be able to control various animating
behaviors via key modifiers but if the user isn't generating new mouse
or key events, you can't tell if a modifier key has been
pressed/released, which can make for awkward interface experiences
with my current design.  Clearly there are better ways to do things, I
was just experimenting and curious.

best,
wes
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Re: modifier key query

2008-12-26 Thread Ron Fleckner


On 26/12/2008, at 7:23 PM, Wesley Smith wrote:


Mainly because I'd like to be able to control various animating
behaviors via key modifiers but if the user isn't generating new mouse
or key events, you can't tell if a modifier key has been
pressed/released, which can make for awkward interface experiences
with my current design.  Clearly there are better ways to do things, I
was just experimenting and curious.

best,
wes


Er... when a modifier key is pressed, that's an NSEvent.  Have a look  
at this:

http://developer.apple.com/qa/qa2007/qa1519.html

HTH,

Ron
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Re: modifier key query

2008-12-26 Thread Gerd Knops


On Dec 26, 2008, at 2:04 AM, Wesley Smith wrote:


Is there a way to know if a modifier key (shift, ctrl, option, cmd,
etc) is pressed?  Obviously, there's this:
NSUInteger modifierFlags = [theEvent modifierFlags];

but what if you need to know this information independent of an
NSEvent?  Anyway to get it?  So far I haven't seen anything
encouraging in the docs.


Depending on the context [[NSApp currentEvent]modifierFlags] may work  
for you.


Gerd

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Re: modifier key query

2008-12-26 Thread Wesley Smith
Thanks, works like a charm.
wes

On Fri, Dec 26, 2008 at 5:10 AM, Ron Fleckner
ronfleck...@ozemail.com.au wrote:

 On 26/12/2008, at 7:23 PM, Wesley Smith wrote:

 Mainly because I'd like to be able to control various animating
 behaviors via key modifiers but if the user isn't generating new mouse
 or key events, you can't tell if a modifier key has been
 pressed/released, which can make for awkward interface experiences
 with my current design.  Clearly there are better ways to do things, I
 was just experimenting and curious.

 best,
 wes

 Er... when a modifier key is pressed, that's an NSEvent.  Have a look at
 this:
 http://developer.apple.com/qa/qa2007/qa1519.html

 HTH,

 Ron

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