The layout manager expects to be drawing within a flipped context.

Douglas Davidson

On Jan 31, 2011, at 2:09 PM, Todd Heberlein wrote:

> I'm doing a simple experiment using NSTextStorage, NSLayoutManager, 
> NSTextContainer to draw some text (I am basing this on the CircleView example 
> because I want some of that orientation power later).
> 
> I have found that when rendering the text using 
> drawGlyphsForGlyphRange:atPoint:, I don't get the text where I expected. It 
> is higher than I expect. Furthermore, when I draw a rectangle around the text 
> (or try to) using the rectangle from usedRectForTextContainer:, the text is 
> outside the rectangle (in short, the rectangle is where I expect it to be, 
> but the text glyphs are not).
> 
> Is there a secret incantation that I am missing?
> 
> Thanks,
> 
> Todd
> 
> Basic code snippet:
> 
> point = NSMakePoint(1.0, 1.0);
> glyphRange = [layoutManager glyphRangeForTextContainer:textContainer];
> usedRect = [layoutManager usedRectForTextContainer:textContainer];
> usedRect.origin = point;
> 
> [layoutManager drawGlyphsForGlyphRange:glyphRange atPoint:point];
> [[NSBezierPath bezierPathWithRect: rect] stroke];
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