On Mar 2, 2009, at 6:19 PM, Graham Cox wrote:
On 03/03/2009, at 2:30 AM, Eric Gorr wrote:
[self lockFocus];
[NSGraphicsContext saveGraphicsState];
NSRect focusRingBounds = [self bounds];
NSSetFocusRingStyle( NSFocusRingOnly );
NSBezierPath *path = [NSBezierPath
bezierPathWithRect:focusRingBounds];
[path setClip];
[path fill];
[NSGraphicsContext restoreGraphicsState];
[self unlockFocus];
Couple of things:
First, the focus ring is typically drawn around the control which
means it's outside the view's bounds. You have to focus on the
superview (parent). convert the coordinates and draw it in that
view. It can still be drawn by 'this' view, but you need to
lockFocus on the parent.
Second, the focus ring is drawn as a stroke along the path, so if
you clip to that same path, you'll only see half of the ring - the
part that falls inside. So don't bother clipping.
I just had a look at a control I wrote a while back that handles a
focus ring, here's the code that draws it:
[[self superview] lockFocus];
NSRect fr = [self frame];
NSSetFocusRingStyle(NSFocusRingOnly);
[[NSBezierPath bezierPathWithRect:fr] fill];
[[self superview] unlockFocus];
duh. Yep, this makes sense...since I am drawing in the superview, I
naturally needed to lock focus on it...
Thanks.
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