Re: setPatternPhase: woes

FROM : I. Savant
DATE : Sat Jul 08 21:23:04 2006

Keith:

  If I recall correctly, the pattern's origin is relative to the 
window coordinates, not the view on which it is being drawn. I hope 
this helps.

--
I.S.


On Jul 8, 2006, at 2:27 PM, Keith Blount wrote:

> Hello,
>
> I have a flipped custom view which has a background
> pattern image. Because I want the image to be tiled
> from the top-left instead of the bottom left (which
> doesn't look right for this particular view), I am
> using NSGraphicsContext's -setPatternPhase: method to
> ensure the pattern origin is at the top left. This is
> what my code for this looks like (contained within
> -drawRect:):
>
> [[NSGraphicsContext currentContext]
> setPatternPhase:NSMakePoint(0,[self
> frame].size.height)];
> [[NSColor colorWithPatternImage:patternImg] set];
>     
> [NSBezierPath fillRect:rect];
>
> This works absolutely fine when I have one such view
> being automatically sized by the window being resized.
> However, when the view is contained within a
> horizontal split view and is at the top, if the user
> drags the splitter bar around to change the size of
> the view, the pattern's origin seems to move in the
> opposite direction of the splitter... Very strange. I
> am guessing that my -setPatternPhase: call is not
> sophisticated enough.
>
> Can anyone spot what I need to do to fix this?j
>
> Many thanks in advance.
>
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