Re: Drawing gradients in views

FROM : Ian G. Gillespie
DATE : Tue Jan 28 23:17:43 2003

Hi,

I tried using the methods sent and I get this error:

-redComponent not defined for the NSColor NSCalibratedWhiteColorSpace 1
1; need to first convert colorspace.

How do I convert colorspace?


On Tuesday, January 28, 2003, at 11:57  AM, Matt Gemmell wrote:

> On Tuesday, January 28, 2003, at 05:11  pm, Ian G. Gillespie wrote:
>

>> Excuse my ignorance (I am still learning, that is for sure), but how
>> do I add a method to the NSBezierPath "category"?

>
> Hi Ian,
>
> A "category" is a way to add methods to an existing class. He's
> suggesting that you create a category on NSBezierPath (i.e. create a
> category which adds a method to NSBezierPath). The enclosed files
> should work. Just add them to your project, and put this line at the
> top of any file you'll be calling the method from:
>
> #import "NSBezierPath+YourExtensions.h"
>
> and then you can call the method like this:
>
> [NSBezierPath drawGradientInRect:yourRect
>         startColor:[NSColor yellowColor]
>         endColor:[NSColor greenColor]];
>
> Note: I haven't checked to see whether the method does what it says it
> does, but the above is indeed how to add a category to an existing
> class.
>
> Cheers,
> -Matt
> <NSBezierPath+YourExtensions.h><NSBezierPath+YourExtensions.m>
> --
> Matt Gemmell
> Scotland Software
> http://www.scotlandsoftware.com/

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