comaps/iphone/Maps/Classes/CustomAlert/DownloadTransitMapsAlert/MWMDownloaderDialogHeader.mm

#import "MWMDownloaderDialogHeader.h"
#import "MWMDownloadTransitMapAlert.h"

static NSString * const kDownloaderDialogHeaderNibName = @"MWMDownloaderDialogHeader";

@interface MWMDownloaderDialogHeader ()

@property(weak, nonatomic) IBOutlet UILabel * title;
@property(weak, nonatomic) IBOutlet UILabel * size;
@property(weak, nonatomic) IBOutlet UIView * dividerView;
@property(weak, nonatomic) MWMDownloadTransitMapAlert * ownerAlert;
@property(weak, nonatomic) IBOutlet NSLayoutConstraint * sizeTrailing;
@property(weak, nonatomic) IBOutlet NSLayoutConstraint * titleLeading;

@end

@implementation MWMDownloaderDialogHeader

+ (instancetype)headerForOwnerAlert:(MWMDownloadTransitMapAlert *)alert
{
  MWMDownloaderDialogHeader * header =
      [NSBundle.mainBundle loadNibNamed:kDownloaderDialogHeaderNibName owner:nil options:nil].firstObject;
  header.ownerAlert = alert;
  return header;
}

- (IBAction)headerButtonTap:(UIButton *)sender
{
  BOOL const currentState = sender.selected;
  sender.selected = !currentState;
  self.dividerView.hidden = currentState;
  [UIView animateWithDuration:kDefaultAnimationDuration
                   animations:^{
                     self.expandImage.transform =
                         sender.selected ? CGAffineTransformMakeRotation(M_PI) : CGAffineTransformIdentity;
                   }];
  [self.ownerAlert showDownloadDetail:sender];
}

- (void)layoutSizeLabel
{
  if (self.expandImage.hidden)
    self.sizeTrailing.constant = self.titleLeading.constant;
  [self layoutIfNeeded];
}

- (void)setTitle:(NSString *)title size:(NSString *)size
{
  self.title.text = title;
  self.size.text = size;
}

@end