/*

     File: ImageNameValueTransformer.m 

 Abstract: Value transformer to convert the name of an image to the NSImage instance.

  Version: 1.1 

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 */

#import "ImageNameValueTransformer.h"

/* Value transformer to convert the name of an image to the NSImage instance */

@implementation ImageNameValueTransformer

+ (Class)transformedValueClass { return [NSString class]; }

+ (BOOL)allowsReverseTransformation { return NO; }

- (id)transformedValue:(id)value { 

    return value ? [NSImage imageNamed:value] : nil;

}

@end

/* Value transformer to convert a rating number to an image */

@implementation RatingValueTransformer

+ (Class)transformedValueClass { return [NSNumber class]; }

+ (BOOL)allowsReverseTransformation { return NO; }

- (id)transformedValue:(id)value {

    id transformedValue = nil;

    NSString *imageName = nil;

    if (value) {

    NSInteger rating = [value integerValue];

    if (rating > 7) imageName = @"FilledDotTemplate";

    else if (rating > 3) imageName = @"HalfDotTemplate";

    else imageName = @"EmptyDotTemplate";

         if (imageName) transformedValue = [NSImage imageNamed:imageName];

    }

    return transformedValue;

}

@end