KCD/HMHistoryMarkTransformer.m

   1 //
   2 //  HMHistoryMarkTransformer.m
   3 //  KCD
   4 //
   5 //  Created by Hori,Masaki on 2016/06/26.
   6 //  Copyright © 2016年 Hori,Masaki. All rights reserved.
   7 //
   8
   9 #import "HMHistoryMarkTransformer.h"
  10
  11 @implementation HMHistoryMarkTransformer
  12 + (void)load
  13 {
  14         static dispatch_once_t onceToken;
  15         dispatch_once(&onceToken, ^{
  16                 [NSValueTransformer setValueTransformer:[self new] forName:@"HMHistoryMarkTransformer"];
  17         });
  18 }
  19 + (Class)transformedValueClass
  20 {
  21         return [NSImage class];
  22 }
  23 + (BOOL)allowsReverseTransformation
  24 {
  25         return NO;
  26 }
  27
  28 - (NSImage *)markImage
  29 {
  30         const CGFloat radius = 10;
  31         NSImage *mark = [[NSImage alloc] initWithSize:NSMakeSize(radius, radius)];
  32         [mark lockFocus];
  33         {
  34                 [[NSColor redColor] set];
  35                 NSBezierPath *path = [NSBezierPath bezierPathWithRoundedRect:NSMakeRect(0, 0, radius, radius)
  36                                                                                                                          xRadius:radius / 2
  37                                                                                                                          yRadius:radius / 2];
  38                 [path fill];
  39         }
  40         [mark unlockFocus];
  41
  42         return mark;
  43 }
  44
  45 - (id)transformedValue:(id)value
  46 {
  47         BOOL mark = [value boolValue];
  48
  49         return mark ? self.markImage : nil;
  50
  51 }
  52 @end