source: trunk/macosx/CTGradient/CTGradient.h @ 7059

//
//  CTGradient.h
//
//  Created by Chad Weider on 2/14/07.
//  Copyright (c) 2007 Chad Weider.
//  Some rights reserved: <http://creativecommons.org/licenses/by/2.5/>
//
//  Version: 1.6

#import <Cocoa/Cocoa.h>

typedef struct _CTGradientElement 
        {
        float red, green, blue, alpha;
        float position;
        
        struct _CTGradientElement *nextElement;
        } CTGradientElement;

typedef enum  _CTBlendingMode
        {
        CTLinearBlendingMode,
        CTChromaticBlendingMode,
        CTInverseChromaticBlendingMode
        } CTGradientBlendingMode;


@interface CTGradient : NSObject <NSCopying, NSCoding>
        {
        CTGradientElement* elementList;
        CTGradientBlendingMode blendingMode;
        
        CGFunctionRef gradientFunction;
        }

+ (id)gradientWithBeginningColor:(NSColor *)begin endingColor:(NSColor *)end;

- (CTGradient *)gradientWithAlphaComponent:(float)alpha;

- (void)addElement:(CTGradientElement*)newElement;

- (CTGradient *)addColorStop:(NSColor *)color atPosition:(float)position;       //positions given relative to [0,1]
- (CTGradient *)removeColorStopAtIndex:(unsigned)index;
- (CTGradient *)removeColorStopAtPosition:(float)position;

- (CTGradientBlendingMode)blendingMode;
- (NSColor *)colorStopAtIndex:(unsigned)index;
- (NSColor *)colorAtPosition:(float)position;


- (void)drawSwatchInRect:(NSRect)rect;
- (void)fillRect:(NSRect)rect angle:(float)angle;                                       //fills rect with axial gradient
                                                                                                                                        //      angle in degrees
- (void)radialFillRect:(NSRect)rect;                                                            //fills rect with radial gradient
                                                                                                                                        //  gradient from center outwards
- (void)fillBezierPath:(NSBezierPath *)path angle:(float)angle;
- (void)radialFillBezierPath:(NSBezierPath *)path;

@end