TransferPanel.h

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@interface TransferPanel : NSView {
        /*
         The background gradient 
         */
        NSGradient *gradient;
        
        /*
         The start color of the gradient
         */
        NSColor *startingColor;
        /*
         The end color of the gradient
         */
        NSColor *endingColor;
        
        /*
         BOOL value which indicates when a color of the gradient changes
         */
        BOOL colorChanged;
        /*
         BOOL value which indicates if the histogramm should be visible
         */
        BOOL histogrammEnabled;
        
        /*
         The histogram as a int array
         */
        int *histogramm;
        int nodeCount;
        NSUInteger maxHistValue;
        
        NSButton *checkBox;
        NSBezierPath *transferPath;
        NSMutableArray *transferNodes;
        
        int activeNode;
}

/*
 A NSButton for enabling the histogramm
 */
@property (nonatomic, retain) IBOutlet NSButton *checkBox;
/*
 The highest value in the histogramm
 */
@property (nonatomic) NSUInteger maxHistValue;
/*
 The index of the node which is selected
 */
@property (nonatomic) int activeNode;
/*
 The number of nodes in the gradient
 */
@property (nonatomic) int nodeCount;
/*
 A NSBezierPath which shows the transfer function
 */
@property (nonatomic, retain) NSBezierPath *transferPath;
/*
 A NSMutableArray with all nodes in the gradient
 */
@property (nonatomic, retain) NSMutableArray *transferNodes;

- (void)reloadGradient;
- (void)setStartColor:(NSColor *)startColor;
- (void)setEndColor:(NSColor *)endColor;
- (void)setHistogramm:(int *)hist withMaxValue:(NSUInteger)maxValue;
- (IBAction)checkBoxClicked:(id)sender;
- (IBAction)saveTransferfunction:(id)sender;
- (IBAction)openTransferfunction:(id)sender;
- (void)dealloc;

@end