Re: RgnHandle replacement?
Re: RgnHandle replacement?
- Subject: Re: RgnHandle replacement?
- From: Scott Anguish <email@hidden>
- Date: Thu, 7 Nov 2002 01:49:50 -0500
On Thursday, November 7, 2002, at 12:49 AM, Jonathan Wight wrote:
Maybe I didn't describe the problem well enough. I've already got code
to
hit test individual pixels within my icons (I'm using NSReadPixel on
the
icon's image instead of using pointer math), but now I want to find
out what
icons are selected when the users drags a selection marquee around
zero or
more icons.
Ah.. ok.. sorry..
Hrmm... you can tell the icons involved, by the bounds as you say...
So, you'd want to test each of the icon areas that overlap the bounds
of the selection to see if there is any pixels activated..
Any pixel within that area is going to indicate a selection right?
So, draw that intersected area of the icon into an NSImage that is 1x1
(scale it) and then see if that single pixel is on.. you'd want to make
sure that anti-aliasing is off when you do this..
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