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/*
Copyright (C) 2017 Apple Inc. All Rights Reserved.
See LICENSE.txt for this sample’s licensing information
Abstract:
Custom NSScrubberItemView used to display an image.
*/
#import "HBThumbnailItemView.h"
@interface HBThumbnailItemView ()
@property (nonatomic, strong) NSImageView *imageView;
@end
#pragma mark -
@implementation HBThumbnailItemView
@synthesize thumbnail = _thumbnail;
- (instancetype)initWithFrame:(NSRect)frameRect
{
self = [super initWithFrame:frameRect];
if (self != nil)
{
_thumbnail = [[NSImage alloc] initWithSize:frameRect.size];
_imageView = [NSImageView imageViewWithImage:_thumbnail];
[_imageView setAutoresizingMask:(NSAutoresizingMaskOptions)(NSViewWidthSizable | NSViewHeightSizable)];
[self addSubview:_imageView];
}
return self;
}
- (void)updateLayer
{
self.layer.backgroundColor = NSColor.controlColor.CGColor;
}
- (void)layout
{
[super layout];
_imageView.frame = self.bounds;
}
- (NSImage *)thumbnail
{
return _imageView.image;
}
- (void)setThumbnail:(NSImage *)thumbnail
{
_imageView.hidden = NO;
_imageView.image = thumbnail;
}
- (void)setThumbnailIndex:(NSUInteger)thumbnailIndex
{
_thumbnailIndex = thumbnailIndex;
_imageView.hidden = YES;
[self.generator copySmallImageAtIndex:thumbnailIndex completionHandler:^(CGImageRef _Nullable result)
{
if (result != NULL)
{
NSSize size = NSMakeSize(CGImageGetWidth(result), CGImageGetHeight(result));
NSImage *thumbnail = [[NSImage alloc] initWithCGImage:result size:size];
dispatch_async(dispatch_get_main_queue(), ^{
[self setThumbnail:thumbnail];
});
}
else
{
dispatch_async(dispatch_get_main_queue(), ^{
[self setThumbnail:nil];
});
}
}];
}
@end
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