InfoBarStackView/ImagePickerViewController.m

/*
     File: ImagePickerViewController.m
 Abstract: The "image picker" view section on the NSStackView.
  Version: 1.0
 
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 */
 
#import "ImagePickerViewController.h"
 
@import Quartz;
 
@implementation MyBrowserItem
 
- (id)initWithName:(NSString *)name
{
    if (self = [super init])
    {
        _image = [NSImage imageNamed:name];
        _imageID = name;
    }
    return self;
}
 
#pragma mark - IKImageBrowserDataSource
 
// (required Methods IKImageBrowserItem Informal Protocol)
 
- (NSString *)imageUID
{
    return _imageID;
}
 
- (NSString *)imageRepresentationType
{
    return IKImageBrowserNSImageRepresentationType;
}
 
- (id)imageRepresentation
{
    return _image;
}
 
// (optional Methods IKImageBrowserItem Informal Protocol)
 
- (NSString *)imageTitle
{
    return _imageID;
}
 
@end
 
 
#pragma mark -
 
@interface ImagePickerViewController ()
@property (strong) NSArray *images;
@end
 
 
#pragma mark -
 
@implementation ImagePickerViewController
 
- (void)awakeFromNib
{
    _images = @[[[MyBrowserItem alloc] initWithName:@"scene1"],
                [[MyBrowserItem alloc] initWithName:@"scene2"],
                [[MyBrowserItem alloc] initWithName:@"scene3"]];
}
 
- (void)setDisclosedView:(NSView *)disclosedView
{
    [super setDisclosedView:disclosedView];
    
    IKImageBrowserView *browserView = [[IKImageBrowserView alloc] initWithFrame:NSZeroRect];
    browserView.dataSource = self;
    
    [browserView setCellSize:CGSizeMake(94.0,94.0)];    // each image will be 94x94
    
    [browserView setTranslatesAutoresizingMaskIntoConstraints:NO];
    
    // make the image browser always be 120 pixels high (the width will be
    // computed for us to snap to the width of the window
    //
    [browserView addConstraint:[NSLayoutConstraint constraintWithItem:browserView
                                                            attribute:NSLayoutAttributeHeight
                                                            relatedBy:NSLayoutRelationEqual
                                                               toItem:nil
                                                            attribute:0
                                                           multiplier:0
                                                             constant:120]];
    [self.disclosedView addSubview:browserView];
    
    // make the browserView snap to the width and height of our parent view (but keeping the height at 200)
    //
    [self.disclosedView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|[browserView]|"
                                                                 options:0
                                                                 metrics:nil
                                                                   views:NSDictionaryOfVariableBindings(browserView)]];
    [self.disclosedView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|[browserView]|"
                                                                 options:0
                                                                 metrics:nil
                                                                   views:NSDictionaryOfVariableBindings(browserView)]];
}
 
#pragma mark - IKImageBrowserDataSource
 
// implement image-browser's datasource protocol - our datasource representation is a simple array
 
- (NSUInteger)numberOfItemsInImageBrowser:(IKImageBrowserView *)view
{
    return [self.images count];
}
 
- (id)imageBrowser:(IKImageBrowserView *)view itemAtIndex:(NSUInteger)index
{
    return [self.images objectAtIndex:index];
}
 
@end