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Re: drawing a simple string with NSFont
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Re: drawing a simple string with NSFont


  • Subject: Re: drawing a simple string with NSFont
  • From: Douglas Davidson <email@hidden>
  • Date: Mon, 13 Aug 2007 16:35:25 -0700


On Aug 7, 2007, at 2:29 AM, Scott F Bayes wrote:

I'm trying to draw an NSString on a NSView while in its drawRect, using
- (void)drawInRect:(NSRect)aRect withAttributes:(NSDictionary *) attribute


from the AppKit NSString additions. I can draw the string where I want to without problem, but I want to select a font and a font size. "Simple Text Drawing" in the Drawing Guide says:
"For an NSString object, you can apply basic attributes (such as font, color, and style settings) to the entire string during drawing." Perfect!


It sounds like setting font&size can be accomplished either with the NSDictionary *withAttributes for drawInRect above, or by [myFont set] while in drawRect.

I find I can create what appears to be a valid NSFont, no problem. But [myFont set] in drawRect doesn't appear to do anything, and I don't know how to construct the NSDictionary mentioned above, assuming it's what I need; I can't figure out what key to use.

Documentation has led me through enough twists and turns that I'm now thoroughly confused.

Any advice or a short example would be appreciated.

The critical thing to remember here is that the Cocoa text system always takes as much as possible from the attribute dictionaries rather than from the drawing context, whether the attributes are present or not. Setting a font or color on the context will potentially affect other sorts of drawing, but not Cocoa text. The Cocoa text system will always use the value of NSFontAttributeName, or NSForegroundColorAttributeName, or any of the other text attributes from AppKit/NSAttributedString.h; or if any attribute is not present then a default value will be used, as specified in that header.


Douglas Davidson

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References: 
 >drawing a simple string with NSFont (From: Scott F Bayes <email@hidden>)

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