CPTGradient.h

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// Based on CTGradient (https://blog.oofn.net/2006/01/15/gradients-in-cocoa/)
// CTGradient is in public domain (Thanks Chad Weider!)
 
 
#import "CPTDefinitions.h"
 
typedef struct _CPTGradientElement {
    CPTRGBAColor color;    
    CGFloat      position; 
 
    struct _CPTGradientElement *__nullable nextElement; 
}
CPTGradientElement;
 
typedef NS_ENUM (NSInteger, CPTGradientBlendingMode) {
    CPTLinearBlendingMode,          
    CPTChromaticBlendingMode,       
    CPTInverseChromaticBlendingMode 
};
 
typedef NS_ENUM (NSInteger, CPTGradientType) {
    CPTGradientTypeAxial, 
    CPTGradientTypeRadial 
};
 
@class CPTColorSpace;
@class CPTColor;
 
@interface CPTGradient : NSObject<NSCopying, NSCoding, NSSecureCoding>
 
@property (nonatomic, readonly, getter = isOpaque) BOOL opaque;
 
@property (nonatomic, readonly) CPTGradientBlendingMode blendingMode;
@property (nonatomic, readwrite, assign) CPTGradientType gradientType;
 
@property (nonatomic, readwrite, assign) CGFloat angle;
 
@property (nonatomic, readwrite, assign) CGPoint startAnchor;
@property (nonatomic, readwrite, assign) CGPoint endAnchor;
 
+(nonnull instancetype)gradientWithBeginningColor:(nonnull CPTColor *)begin endingColor:(nonnull CPTColor *)end;
+(nonnull instancetype)gradientWithBeginningColor:(nonnull CPTColor *)begin endingColor:(nonnull CPTColor *)end beginningPosition:(CGFloat)beginningPosition endingPosition:(CGFloat)endingPosition;
 
+(nonnull instancetype)aquaSelectedGradient;
+(nonnull instancetype)aquaNormalGradient;
+(nonnull instancetype)aquaPressedGradient;
 
+(nonnull instancetype)unifiedSelectedGradient;
+(nonnull instancetype)unifiedNormalGradient;
+(nonnull instancetype)unifiedPressedGradient;
+(nonnull instancetype)unifiedDarkGradient;
 
+(nonnull instancetype)sourceListSelectedGradient;
+(nonnull instancetype)sourceListUnselectedGradient;
 
+(nonnull instancetype)rainbowGradient;
+(nonnull instancetype)hydrogenSpectrumGradient;
 
-(nonnull CPTGradient *)gradientWithAlphaComponent:(CGFloat)alpha;
-(nonnull CPTGradient *)gradientWithBlendingMode:(CPTGradientBlendingMode)mode;
 
-(nonnull CPTGradient *)addColorStop:(nonnull CPTColor *)color atPosition:(CGFloat)position; // positions given relative to [0,1]
-(nonnull CPTGradient *)removeColorStopAtIndex:(NSUInteger)idx;
-(nonnull CPTGradient *)removeColorStopAtPosition:(CGFloat)position;
 
-(nullable CGColorRef)newColorStopAtIndex:(NSUInteger)idx CF_RETURNS_RETAINED;
-(nonnull CGColorRef)newColorAtPosition:(CGFloat)position CF_RETURNS_RETAINED;
 
-(void)drawSwatchInRect:(CGRect)rect inContext:(nonnull CGContextRef)context;
-(void)fillRect:(CGRect)rect inContext:(nonnull CGContextRef)context;
-(void)fillPathInContext:(nonnull CGContextRef)context;
 
@end