LiedouYouxuan/Pods/ZLPhotoBrowser/PhotoBrowser/ZLImageEditT.../ZLClipItem.m

//
//  ZLClipItem.m
//  ZLPhotoBrowser
//
//  Created by long on 2018/5/6.
//  Copyright © 2018年 long. All rights reserved.
//

#import "ZLClipItem.h"


@implementation ZLClippingCircle

- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGRect rct = self.bounds;
    rct.origin.x = rct.size.width/2-rct.size.width/6;
    rct.origin.y = rct.size.height/2-rct.size.height/6;
    rct.size.width /= 3;
    rct.size.height /= 3;
    
    CGContextSetFillColorWithColor(context, self.bgColor.CGColor);
    CGContextFillEllipseInRect(context, rct);
}

@end


//!!!!: ZLGridLayar
@implementation ZLGridLayar

+ (BOOL)needsDisplayForKey:(NSString*)key
{
    if ([key isEqualToString:@"clippingRect"]) {
        return YES;
    }
    return [super needsDisplayForKey:key];
}

- (id)initWithLayer:(id)layer
{
    self = [super initWithLayer:layer];
    if(self && [layer isKindOfClass:[ZLGridLayar class]]){
        self.bgColor   = ((ZLGridLayar *)layer).bgColor;
        self.gridColor = ((ZLGridLayar *)layer).gridColor;
        self.clippingRect = ((ZLGridLayar *)layer).clippingRect;
    }
    return self;
}

- (void)drawInContext:(CGContextRef)context
{
    CGRect rct = self.bounds;
    CGContextSetFillColorWithColor(context, self.bgColor.CGColor);
    CGContextFillRect(context, rct);
    
    CGContextClearRect(context, _clippingRect);
    
    CGContextSetStrokeColorWithColor(context, self.gridColor.CGColor);
    CGContextSetLineWidth(context, 1);
    
    rct = self.clippingRect;
    
    CGContextBeginPath(context);
    CGFloat dW = 0;
    for(int i=0;i<4;++i){
        CGContextMoveToPoint(context, rct.origin.x+dW, rct.origin.y);
        CGContextAddLineToPoint(context, rct.origin.x+dW, rct.origin.y+rct.size.height);
        dW += _clippingRect.size.width/3;
    }
    
    dW = 0;
    for(int i=0;i<4;++i){
        CGContextMoveToPoint(context, rct.origin.x, rct.origin.y+dW);
        CGContextAddLineToPoint(context, rct.origin.x+rct.size.width, rct.origin.y+dW);
        dW += rct.size.height/3;
    }
    CGContextStrokePath(context);
}

@end


//!!!!: ZLClipRatio
@implementation ZLClipRatio
{
    CGFloat _longSide;
    CGFloat _shortSide;
}

- (id)initWithValue1:(CGFloat)value1 value2:(CGFloat)value2
{
    self = [super init];
    if(self){
        _longSide  = MAX(fabs(value1), fabs(value2));
        _shortSide = MIN(fabs(value1), fabs(value2));
    }
    return self;
}

- (NSString*)description
{
    NSString *format = (self.titleFormat) ? self.titleFormat : @"%g : %g";
    
    if(self.isLandscape){
        return [NSString stringWithFormat:format, _longSide, _shortSide];
    }
    return [NSString stringWithFormat:format, _shortSide, _longSide];
}

- (CGFloat)ratio
{
    if(_longSide==0 || _shortSide==0){
        return 0;
    }
    
    if(self.isLandscape){
        return _shortSide / (CGFloat)_longSide;
    }
    return _longSide / (CGFloat)_shortSide;
}

@end


//!!!!: ZLClipItem
@implementation ZLClipItem

- (instancetype)initWithFrame:(CGRect)frame
{
    return [self initWithFrame:CGRectZero image:nil target:nil action:nil];
}

- (instancetype)initWithCoder:(NSCoder *)coder
{
    return [self initWithFrame:CGRectZero image:nil target:nil action:nil];
}

- (instancetype)initWithFrame:(CGRect)frame image:(UIImage *)image target:(id)target action:(SEL)action
{
    self = [super initWithFrame:frame];
    if(self){
        UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:target action:action];
        [self addGestureRecognizer:gesture];
        
        CGFloat W = frame.size.width;
        _iconView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 5, W-20, W-20)];
        _iconView.clipsToBounds = YES;
        _iconView.image = image;
        _iconView.layer.cornerRadius = 5;
        _iconView.contentMode = UIViewContentModeScaleAspectFill;
        [self addSubview:_iconView];
        
        _titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(_iconView.frame) + 5, W, 15)];
        _titleLabel.backgroundColor = [UIColor clearColor];
        _titleLabel.font = [UIFont systemFontOfSize:10];
        _titleLabel.textColor = [UIColor whiteColor];
        _titleLabel.textAlignment = NSTextAlignmentCenter;
        [self addSubview:_titleLabel];
    }
    return self;
}

- (void)setRatio:(ZLClipRatio *)ratio
{
    if(ratio != _ratio){
        _ratio = ratio;
    }
}

- (void)refreshViews
{
    _titleLabel.text = [_ratio description];
    
    CGPoint center = _iconView.center;
    CGFloat W, H;
    if (_ratio.ratio != 0) {
        if(_ratio.isLandscape) {
            W = 50;
            H = 50*_ratio.ratio;
        } else {
            W = 50/_ratio.ratio;
            H = 50;
        }
    } else {
        CGFloat maxW  = MAX(_iconView.image.size.width, _iconView.image.size.height);
        W = 50 * _iconView.image.size.width / maxW;
        H = 50 * _iconView.image.size.height / maxW;
    }
    _iconView.frame = CGRectMake(center.x-W/2, center.y-H/2, W, H);
}

- (void)changeOrientation
{
    self.ratio.isLandscape = !self.ratio.isLandscape;
    
    [UIView animateWithDuration:0.2 animations:^{
        [self refreshViews];
    }];
}

@end