Tusker/GMImagePicker/GMGridViewCell.m

//
//  GMGridViewCell.m
//  GMPhotoPicker
//
//  Created by Guillermo Muntaner Perelló on 19/09/14.
//  Copyright (c) 2014 Guillermo Muntaner Perelló. All rights reserved.
//

#import "GMGridViewCell.h"


@interface GMGridViewCell ()
@end


@implementation GMGridViewCell

static UIFont *titleFont;
static CGFloat titleHeight;
static UIImage *videoIcon;
static UIColor *titleColor;
static UIImage *checkedIcon;
static UIColor *selectedColor;
static UIColor *disabledColor;

+ (void)initialize
{
  titleFont       = [UIFont systemFontOfSize:12];
  titleHeight     = 20.0f;
  videoIcon       = [UIImage imageNamed:@"GMImagePickerVideo"];
  titleColor      = [UIColor whiteColor];
  checkedIcon     = [UIImage imageNamed:@"CTAssetsPickerChecked"];
  selectedColor   = [UIColor colorWithWhite:1 alpha:0.3];
  disabledColor   = [UIColor colorWithWhite:1 alpha:0.9];
}

- (void)awakeFromNib
{
  [super awakeFromNib];
  
  self.contentView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
  self.contentView.translatesAutoresizingMaskIntoConstraints = YES;
}

- (id)initWithFrame:(CGRect)frame
{
  if (self = [super initWithFrame:frame]) {
    self.opaque                 = NO;
    self.enabled                = YES;
    
    CGFloat cellSize = self.contentView.bounds.size.width;
    
    // The image view
    _imageView = [UIImageView new];
    _imageView.frame = CGRectMake(0, 0, cellSize, cellSize);
    _imageView.contentMode = UIViewContentModeScaleAspectFill;
    /*if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
     {
     _imageView.contentMode = UIViewContentModeScaleAspectFit;
     }
     else
     {
     _imageView.contentMode = UIViewContentModeScaleAspectFill;
     }*/
    _imageView.clipsToBounds = YES;
    _imageView.translatesAutoresizingMaskIntoConstraints = NO;
    _imageView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [self addSubview:_imageView];
    
    
    // The video gradient, label & icon
    float x_offset = 4.0f;
    UIColor *topGradient = [UIColor colorWithRed:0.00 green:0.00 blue:0.00 alpha:0.0];
    UIColor *botGradient = [UIColor colorWithRed:0.00 green:0.00 blue:0.00 alpha:0.8];
    _gradientView = [[UIView alloc] initWithFrame: CGRectMake(0.0f, self.bounds.size.height-titleHeight, self.bounds.size.width, titleHeight)];
    _gradient = [CAGradientLayer layer];
    _gradient.frame = _gradientView.bounds;
    _gradient.colors = [NSArray arrayWithObjects:(id)[topGradient CGColor], (id)[botGradient CGColor], nil];
    [_gradientView.layer insertSublayer:_gradient atIndex:0];
    _gradientView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin;
    _gradientView.translatesAutoresizingMaskIntoConstraints = NO;
    [self addSubview:_gradientView];
    _gradientView.hidden = YES;
    
    _videoIcon = [UIImageView new];
    _videoIcon.frame = CGRectMake(x_offset, self.bounds.size.height-titleHeight, self.bounds.size.width-2*x_offset, titleHeight);
    _videoIcon.contentMode = UIViewContentModeLeft;
    _videoIcon.image = [UIImage imageNamed:@"GMVideoIcon" inBundle:[NSBundle bundleForClass:GMGridViewCell.class] compatibleWithTraitCollection:nil];
    _videoIcon.translatesAutoresizingMaskIntoConstraints = NO;
    _videoIcon.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
    [self addSubview:_videoIcon];
    _videoIcon.hidden = YES;
    
    _videoDuration = [UILabel new];
    _videoDuration.font = titleFont;
    _videoDuration.textColor = titleColor;
    _videoDuration.textAlignment = NSTextAlignmentRight;
    _videoDuration.frame = CGRectMake(x_offset, self.bounds.size.height-titleHeight, self.bounds.size.width-2*x_offset, titleHeight);
    _videoDuration.contentMode = UIViewContentModeRight;
    _videoDuration.translatesAutoresizingMaskIntoConstraints = NO;
    _videoDuration.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
    [self addSubview:_videoDuration];
    _videoDuration.hidden = YES;
    
    // Selection overlay & icon
    _coverView = [[UIView alloc] initWithFrame:self.bounds];
    _coverView.translatesAutoresizingMaskIntoConstraints = NO;
    _coverView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    _coverView.backgroundColor = [UIColor colorWithRed:0.24 green:0.47 blue:0.85 alpha:0.6];
    [self addSubview:_coverView];
    _coverView.hidden = YES;
    
    _selectedButton = [UIButton buttonWithType:UIButtonTypeCustom];
    _selectedButton.frame = CGRectMake(2*self.bounds.size.width/3, 0*self.bounds.size.width/3, self.bounds.size.width/3, self.bounds.size.width/3);
    _selectedButton.contentMode = UIViewContentModeTopRight;
    _selectedButton.adjustsImageWhenHighlighted = NO;
    [_selectedButton setImage:nil forState:UIControlStateNormal];
    _selectedButton.translatesAutoresizingMaskIntoConstraints = NO;
    _selectedButton.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    [_selectedButton setImage:[UIImage imageNamed:@"GMSelected" inBundle:[NSBundle bundleForClass:GMGridViewCell.class] compatibleWithTraitCollection:nil] forState:UIControlStateSelected];
    _selectedButton.hidden = NO;
    _selectedButton.userInteractionEnabled = NO;
    [self addSubview:_selectedButton];
  }
  
  // Note: the views above are created in case this is toggled per cell, on the fly, etc.!
  self.shouldShowSelection = YES;
  
  return self;
}

// Required to resize the CAGradientLayer because it does not support auto resizing.
- (void)layoutSubviews {
  [super layoutSubviews];
  _gradient.frame = _gradientView.bounds;
}

- (void)bind:(PHAsset *)asset
{
  self.asset  = asset;
  
  if (self.asset.mediaType == PHAssetMediaTypeVideo) {
    _videoIcon.hidden = NO;
    _videoDuration.hidden = NO;
    _gradientView.hidden = NO;
    _videoDuration.text = [self getDurationWithFormat:self.asset.duration];
  } else {
    _videoIcon.hidden = YES;
    _videoDuration.hidden = YES;
    _gradientView.hidden = YES;
  }
}

// Override setSelected
- (void)setSelected:(BOOL)selected
{
  [super setSelected:selected];
  
  if (!self.shouldShowSelection) {
    return;
  }
  
  _coverView.hidden = !selected;
  _selectedButton.selected = selected;
}

-(NSString*)getDurationWithFormat:(NSTimeInterval)duration
{
  NSInteger ti = (NSInteger)duration;
  NSInteger seconds = ti % 60;
  NSInteger minutes = (ti / 60) % 60;
  //NSInteger hours = (ti / 3600);
  return [NSString stringWithFormat:@"%02ld:%02ld", (long)minutes, (long)seconds];
}

@end