silica-viewer/SilicaViewer/ViewController.swift

import Foundation
import Cocoa
import Quartz

class ViewController: NSViewController {
    @IBOutlet weak var imageView: NSImageView!
    @IBOutlet weak var loadingField: NSTextField!
    
    override func viewDidLoad() {
        imageView.setContentCompressionResistancePriority(
                    .defaultLow,
                    for: .horizontal)

                imageView.setContentCompressionResistancePriority(
                    .defaultLow,
                    for: .vertical)
                
    }
    
    override func viewWillAppear() {
        let document = self.view.window?.windowController?.document as? Document
        
        DispatchQueue.main.async {
            guard let image = document?.makeComposite() else {
                self.loadingField.stringValue = "Failed to load."
                return
            }
            
            self.imageView.image = image
            self.loadingField.isHidden = true
        }
    }
    
    override func prepare(for segue: NSStoryboardSegue, sender: Any?) {
        if(segue.identifier == "showInfo") {
            // TODO: there HAS to be a better way to pass the Document class along...
            (segue.destinationController as! InfoViewController).document = self.view.window?.windowController?.document as? Document
        } else if(segue.identifier == "showTimelapse") {
            ((segue.destinationController as! NSWindowController).contentViewController as! TimelapseViewController).document = self.view.window?.windowController?.document as? Document
        }
    }
}