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Re: Drawing gradients in views
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Re: Drawing gradients in views


  • Subject: Re: Drawing gradients in views
  • From: Matt Gemmell <email@hidden>
  • Date: Tue, 28 Jan 2003 03:26:01 +0000

On Tuesday, January 28, 2003, at 02:52 am, Ian G. Gillespie wrote:

Does anyone know if it possible to fill an NSRect with a gradient. I envision creating a rectangle that looks like the ones in iCal, they have that smooth color gradient. I have figured out how to create shadows for my rectangles, but don't know how to do a gradient.

If you happen to be using an NSButton, or subclass of it, it seems to have a very basic -setGradientType: method, but only for black-white gradients. I think you'd need to draw the gradients manually otherwise.

Also, I have tried to figure out how to draw a rect with rounded corners but haven't had any luck. I found this http://lists.apple.com/archives/cocoa-dev/2001/Aug/28/ drawingroundedrect.002.txt in the archives, but it didn't work for me. My rectangles weren't rectangles at all!

I'm not experienced in this, but I imagine you'd have to play with NSBezierPath's lineJoinStyle and lineCapStyle, at least for very shallow rounded corners.

For more pronounced roundness, you'd probably need to use -curveToPoint:... and -relativeCurveToPoint:... and do the rounded bits yourself. See the docs for NSBezierPath for more on this. I'm also fairly sure that Scott's book (Cocoa Programming, www.cocoaprogramming.net) has a specific example of using curveToPoint:... with a certain radius etc.

Best,
-Matt

--
Matt Gemmell
Scotland Software
http://www.scotlandsoftware.com/
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      • From: Joseph Jones <email@hidden>
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 >Drawing gradients in views (From: "Ian G. Gillespie" <email@hidden>)

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