Re: RgnHandle replacement?
Re: RgnHandle replacement?
- Subject: Re: RgnHandle replacement?
- From: Scott Anguish <email@hidden>
- Date: Thu, 7 Nov 2002 00:29:42 -0500
On Wednesday, November 6, 2002, at 06:43 PM, Jonathan Wight wrote:
In my cocoa NSView subclass I have a bunch of icons and want to allow
the
user to select them with a selection marquee. I've the core of this
working
but to test if the icons are selected by the marquee I'm using
NSIntersectsRect to see if the marquee rectangle is intersecting the
icon's
bounds rect.
You'd want to create an NSImage with the icon in it (oh, you probably
already have that then right?), and then test the hit point to see if
it has a pixel or not...
Here is someone doing something similar, and a thread where it was
discussed
http://cocoa.mamasam.com/COCOADEV/2001/09/2/13509.php
(look at both JCR's response, and Ken Dyke's)
getting the color of a specific pixel is a pretty common operation,
but it's dependent on the format of the underlying graphic at this
point.. the bit level and format... you could simplify this if your
image is always the same depth..
it'd be better if it was part of the API though.
_______________________________________________
cocoa-dev mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/cocoa-dev
Do not post admin requests to the list. They will be ignored.