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CKBlurView.m
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CKBlurView.m
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//
// CKBlurView.m
// CKBlurView
//
// Created by Conrad Kramer on 10/25/13.
// Copyright (c) 2013 Kramer Software Productions, LLC. All rights reserved.
//
// MRC-Augmented by Julian Weiss on 1/4/14.
// Copyright (c) 2014 Julian Weiss.
//
#import <QuartzCore/QuartzCore.h>
#import "CKBlurView.h"
@interface CABackdropLayer : CALayer
@end
@interface CKBlurView ()
@property (retain, nonatomic) CAFilter *blurFilter;
@property (retain, nonatomic) CAFilter *colorFilter;
@end
extern NSString * const kCAFilterGaussianBlur;
NSString * const CKBlurViewQualityDefault = @"default";
NSString * const CKBlurViewQualityLow = @"low";
static NSString * const CKBlurViewQualityKey = @"inputQuality";
static NSString * const CKBlurViewRadiusKey = @"inputRadius";
static NSString * const CKBlurViewBoundsKey = @"inputBounds";
static NSString * const CKBlurViewHardEdgesKey = @"inputHardEdges";
@implementation CKBlurView
+ (Class)layerClass {
return [CABackdropLayer class];
}
- (instancetype)init {
self = [super init];
return [self commonInit];
}
- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
return [self commonInit];
}
- (instancetype)commonInit {
CAFilter *filter = [CAFilter filterWithName:kCAFilterGaussianBlur];
self.layer.filters = @[filter];
self.blurFilter = filter;
self.blurQuality = CKBlurViewQualityDefault;
self.blurRadius = 5.0;
[[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(show) name:@"CKShow" object:nil];
[[NSDistributedNotificationCenter defaultCenter] addObserver:self selector:@selector(hide) name:@"CKHide" object:nil];
return self;
}
- (void)show {
self.hidden = NO;
}
- (void)hide {
self.hidden = YES;
}
- (void)makeMilky {
id innerColor = (id)[UIColor clearColor].CGColor;
id outerColor = (id)[UIColor colorWithWhite:0.5 alpha:0.75].CGColor;
CAGradientLayer *horizontal = [CAGradientLayer layer];
horizontal.opacity = 0.75;
horizontal.colors = @[outerColor, innerColor, innerColor, outerColor];
horizontal.locations = @[@(0.0), @(0.15), @(0.85), @(1.0)];
horizontal.startPoint = CGPointMake(0.0, 0.5);
horizontal.endPoint = CGPointMake(1.0, 0.5);
horizontal.bounds = self.bounds;
horizontal.anchorPoint = CGPointZero;
CAGradientLayer *vertical = [CAGradientLayer layer];
vertical.opacity = horizontal.opacity;
vertical.colors = horizontal.colors;
vertical.locations = horizontal.locations;
vertical.bounds = self.bounds;
vertical.anchorPoint = CGPointZero;
[self.layer addSublayer:horizontal];
[self.layer addSublayer:vertical];
}
- (void)setTintColorFilter:(CAFilter *)filter {
self.colorFilter = filter;
self.layer.filters = @[ self.colorFilter, self.blurFilter ];
}
- (void)setQuality:(NSString *)quality {
[self.blurFilter setValue:quality forKey:CKBlurViewQualityKey];
}
- (NSString *)quality {
return [self.blurFilter valueForKey:CKBlurViewQualityKey];
}
- (void)setBlurRadius:(CGFloat)radius {
[self.blurFilter setValue:@(radius) forKey:CKBlurViewRadiusKey];
}
- (CGFloat)blurRadius {
return [[self.blurFilter valueForKey:CKBlurViewRadiusKey] floatValue];
}
- (void)setBlurCroppingRect:(CGRect)croppingRect {
[self.blurFilter setValue:[NSValue valueWithCGRect:croppingRect] forKey:CKBlurViewBoundsKey];
}
- (CGRect)blurCroppingRect {
NSValue *value = [self.blurFilter valueForKey:CKBlurViewBoundsKey];
return value ? [value CGRectValue] : CGRectNull;
}
- (void)setBlurEdges:(BOOL)blurEdges {
[self.blurFilter setValue:@(!blurEdges) forKey:CKBlurViewHardEdgesKey];
}
- (BOOL)blurEdges {
return ![[self.blurFilter valueForKey:CKBlurViewHardEdgesKey] boolValue];
}
- (void)dealloc{
[[NSDistributedNotificationCenter defaultCenter] removeObserver:self];
[_blurFilter release];
[_colorFilter release];
[_blurQuality release];
[super dealloc];
}
@end