Re: CALayer Border, Not Inset
Re: CALayer Border, Not Inset
- Subject: Re: CALayer Border, Not Inset
- From: Scott Anguish <email@hidden>
- Date: Mon, 7 Jan 2008 13:43:54 -0500
On Jan 7, 2008, at 1:39 PM, Bridger Maxwell wrote:
Hello,
RIght now I am making a Core Animation program that displays
photos. This
is the code I use to draw the image (inside the CALayer), along with a
slightly transparent black background and a white border.
- (void) setImage: (CGImageRef)image bounds: (CGRect)rect
{
self.contents = (id) image;
self.contentsGravity = @"resize";
self.minificationFilter = kCAFilterLinear;
self.bounds = rect;
CGFloat border = MAX(CGRectGetHeight(rect),CGRectGetWidth(rect));
border /= 60;
self.borderWidth = border;
self.borderColor = CGColorGetConstantColor(kCGColorWhite);
CGColorRef background = CGColorGetConstantColor(kCGColorBlack);
background = CGColorCreateCopyWithAlpha(background,0.8);
self.backgroundColor = background;
}
The only problem is that the border is drawn over the image, because
it is
drawn inset from the bounds, and the contents of the layer go right
to the
edge. Is there a way to either have the image draw itself a little
ways out
from the bounds (to leave room for a border) or to draw the border
outset
from the bounds? I suppose I could make another layer within this
one to
hold the image, but being a new Cocoa programmer I am a little
worried about
making my program any more complicated than it needs to be.
if you simply make the layer bounds a bit larger, and set the display
mode so that it doesn't stretch the picture that should work.
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