--- a/PDFViewer/appdelegate/AppDelegate.m
+++ b/PDFViewer/appdelegate/AppDelegate.m
@@ -8,14 +8,9 @@
 
 #import "AppDelegate.h"
 
-@interface AppDelegate ()
-
-@end
-
 @implementation AppDelegate
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
-    // Insert code here to initialize your application
 }
 
 - (void)applicationWillTerminate:(NSNotification *)aNotification {
@@ -26,4 +21,35 @@
     return TRUE;
 }
 
+- (BOOL) application:(NSApplication *)sender openFile:(NSString *)filename {
+    window = [[[NSApplication sharedApplication] windows] objectAtIndex:0];
+    controller = (ViewController*) [window contentViewController];
+    
+    NSURL *url = [[NSURL alloc] initFileURLWithPath:filename];
+    BOOL status = [[controller pdfViewer] loadUrl: url];
+    
+    if (!status) {
+        [[controller pdfViewer] speak:(NSMutableString*)@"Das Dokument konnte nicht geladen werden"];
+    } else {
+        [[controller pdfViewer] startSpeaking:nil];
+    }
+    
+    return status;
+}
+
+- (void) application:(NSApplication *)sender openFiles:(NSArray<NSString *> *)filenames {
+    window = [[[NSApplication sharedApplication] windows] objectAtIndex:0];
+    controller = (ViewController*) [window contentViewController];
+    
+    NSString *filename = [filenames objectAtIndex:0];
+    NSURL *url = [[NSURL alloc] initFileURLWithPath:filename];
+    BOOL status = [[controller pdfViewer] loadUrl: url];
+    
+    if (!status) {
+        [[controller pdfViewer] speak:(NSMutableString*)@"Das Dokument konnte nicht geladen werden"];
+    } else {
+        [[controller pdfViewer] startSpeaking:nil];
+    }
+}
+
 @end