silica-viewer/SilicaViewer/AppDelegate.swift

import Cocoa

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate, NSUserInterfaceValidations {
    @IBAction func showInfoAction(_ sender: Any) {
        NSApplication.shared.keyWindow?.contentViewController?.performSegue(withIdentifier: "showInfo", sender: self)
    }
    
    @IBAction func showTimelapseAction(_ sender: Any) {
        NSApplication.shared.keyWindow?.contentViewController?.performSegue(withIdentifier: "showTimelapse", sender: self)
    }
    
    func validateUserInterfaceItem(_ item: NSValidatedUserInterfaceItem) -> Bool {
        // Show timelapse and show info buttons
        if(item.tag == 67 || item.tag == 68) {
            return NSApplication.shared.keyWindow != nil
        }
        
        return true
    }
    
    @IBAction func exportAction(_ sender: Any) {
        let document = NSApplication.shared.keyWindow?.windowController?.document as? Document;
        
        let savePanel = NSSavePanel()
        savePanel.title = "Save"
        savePanel.allowedFileTypes = ["public.png"]
        savePanel.begin { (result) in
            if result.rawValue == NSApplication.ModalResponse.OK.rawValue {
                let canvas = document?.makeComposite()
                let canvasTiff = canvas?.tiffRepresentation
                let bitmapImage = NSBitmapImageRep(data: canvasTiff!)
                let canvasPng = bitmapImage!.representation(using: .png, properties: [:])
             
                try? canvasPng?.write(to: savePanel.url!)
            }
        }
    }
    
    @IBAction func exportThumbnailAction(_ sender: Any) {
        let document = NSApplication.shared.keyWindow?.windowController?.document as? Document;
        
        let savePanel = NSSavePanel()
        savePanel.title = "Save Thumbnail"
        savePanel.allowedFileTypes = ["public.png"]
        savePanel.begin { (result) in
            if result.rawValue == NSApplication.ModalResponse.OK.rawValue {
                let canvas = document?.makeThumbnail()
                let canvasTiff = canvas?.tiffRepresentation
                let bitmapImage = NSBitmapImageRep(data: canvasTiff!)
                let canvasPng = bitmapImage!.representation(using: .png, properties: [:])
             
                try? canvasPng?.write(to: savePanel.url!)
            }
        }
    }
    
}