Drag into Dock-Icon kind-of works now

Author: niorad

Skewbacca Native/AppDelegate.swift

@@ -1,31 +1,27 @@
-//
-//  AppDelegate.swift
-//  Skewbacca Native
-//
-//  Created by Antonio Radovcic on 01.01.19.
-//  Copyright © 2019 niorad. All rights reserved.
-//
-
 import Cocoa
 
 @NSApplicationMain
 class AppDelegate: NSObject, NSApplicationDelegate {
 
     @IBOutlet weak var openMenuItem: NSMenuItem!
     @IBOutlet weak var exportMenuItem: NSMenuItem!
+    var rootVC: ViewController!
+
+    func application(_ sender: NSApplication, openFile filename: String) -> Bool {
+        rootVC.onFileDraggedOnDock(filename)
+        return true
+    }
 
     func applicationDidFinishLaunching(_ aNotification: Notification) {
-        // Insert code here to initialize your application
+        rootVC = (NSApplication.shared.mainWindow?.windowController?.contentViewController as! ViewController)
     }
 
     func applicationWillTerminate(_ aNotification: Notification) {
-        // Insert code here to tear down your application
     }
 
     func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
         return true
     }
 
-
 }
 

Skewbacca Native/Info.plist

@@ -4,6 +4,27 @@
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeExtensions</key>
+			<array>
+				<string>*</string>
+			</array>
+			<key>CFBundleTypeMIMETypes</key>
+			<array>
+				<string>image/jpeg</string>
+			</array>
+			<key>CFBundleTypeName</key>
+			<string>Image Files</string>
+			<key>CFBundleTypeRole</key>
+			<string>Viewer</string>
+			<key>LSTypeIsPackage</key>
+			<integer>0</integer>
+			<key>NSDocumentClass</key>
+			<string>NSDocument</string>
+		</dict>
+	</array>
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
 	<key>CFBundleIconFile</key>

Skewbacca Native/StageController.swift

@@ -1,6 +1,5 @@
 import Cocoa
 
-
 class StageController: NSViewController {
 
     @IBOutlet var topLeft: NSImageView!

Skewbacca Native/ViewController.swift

@@ -23,6 +23,10 @@ class ViewController: NSViewController {
         }
     }
 
+    func onFileDraggedOnDock(_ path: String) {
+        stageViewController!.setImage(URL(fileURLWithPath: path))
+    }
+
     @IBAction func onOpenMenuItemSelected(_ sender: Any) {
         let openDialog = NSOpenPanel()
         openDialog.title = "Open Image"