Re: Converting HIPoints to CGPoints/NSPoints in global space?
Re: Converting HIPoints to CGPoints/NSPoints in global space?
- Subject: Re: Converting HIPoints to CGPoints/NSPoints in global space?
- From: Raleigh Ledet <email@hidden>
- Date: Mon, 13 Feb 2006 10:00:51 -0800
HiPoints are not always 0,0 upper left. HIViews mimic NSViews See:
<http://developer.apple.com/documentation/Carbon/Conceptual/HIViewDoc/
HIView_concept/chapter_1_section_1.html>
However, this is not always the case. Global carbon HIPoint mouse
coordinates are origin upper left. You must know the source of the
HIPoint to make any judgement on it.
Why are you looping through all the displays? The only one that
matters is the one with the menu bar. If you want to go from Carbon
global space to Cocoa global space, the the bottom left of the screen
with the menu bar is your origin. Use that screen's height in your
calculation.
-raleigh
On Feb 12, 2006, at 2:18 PM, email@hidden wrote:
Sorry...
HIPoints in general are relative to 0,0 in the upper left.
NSPoints (and CGPoints) are relative to 0,0 in the lower left.
so an HIPoint at x,y coordinates is equivalent to an NSPoint at
x,displaysheight - y
The question is an easy way of figuring out exactly how high the
display height is, especially in the case of multiple monitors.
Currently I'm looping through the displays, but there's got to be a
better way of doing it.
Cheers,
Dave
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