Fix NSApplication blocking main thread

src/SharpMetal.Examples.Animation/Program.cs

@@ -97,6 +97,9 @@ public static void Main()
 
  // Create NSApplication
  var nsApplication = new NSApplication();
+ var appDelegate = new NSApplicationDelegate(nsApplication);
+ nsApplication.SetDelegate(appDelegate);
+ appDelegate.OnDidFinishLaunching += OnDidFinishLaunching;
 
  // Create and show NSWindow
  var window = new NSWindow(rect, (ulong)(NSStyleMask.Titled | NSStyleMask.Resizable));
@@ -242,9 +245,19 @@ public static void Main()
 
  nsApplication.Run();
 
+ while (true)
+ {
+ // Do stuff
+ }
+
  // Release pool
  autoreleasePool.Drain();
  }
+
+ private static void OnDidFinishLaunching(NSApplication application)
+ {
+ application.Stop();
+ }
  }
 
  [StructLayout(LayoutKind.Sequential)]

src/SharpMetal.Examples.Common/NSApplication.cs

@@ -17,5 +17,15 @@ public void Run()
  {
  ObjectiveC.objc_msgSend(NativePtr, "run");
  }
+
+ public void Stop()
+ {
+ ObjectiveC.objc_msgSend(NativePtr, "stop:", IntPtr.Zero);
+ }
+
+ public void SetDelegate(NSApplicationDelegate appDelegate)
+ {
+ ObjectiveC.objc_msgSend(NativePtr, "setDelegate:", appDelegate.NativePtr);
+ }
  }
 }

src/SharpMetal.Examples.Common/NSApplicationDelegate.cs

@@ -0,0 +1,41 @@
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+using SharpMetal.ObjectiveCCore;
+
+namespace SharpMetal.Examples.Common
+{
+ [SupportedOSPlatform("macos")]
+ public class NSApplicationDelegate
+ {
+ [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+ public delegate void OnDidFinishLaunchingDelegate(IntPtr id, IntPtr cmd, IntPtr notification);
+
+ private OnDidFinishLaunchingDelegate _onDidFinishLaunching;
+ private NSApplication _application;
+
+ public Action<NSApplication> OnDidFinishLaunching;
+ public IntPtr NativePtr;
+
+ public unsafe NSApplicationDelegate(NSApplication application)
+ {
+ _application = application;
+ char[] name = "AppDelegate".ToCharArray();
+ char[] types = "v@:#".ToCharArray();
+
+ fixed (char* pName = name)
+ {
+ fixed (char* pTypes = types)
+ {
+ _onDidFinishLaunching = (_, _, _) => OnDidFinishLaunching?.Invoke(_application);
+ var delegatePtr = Marshal.GetFunctionPointerForDelegate(_onDidFinishLaunching);
+
+ var appDelegateClass = ObjectiveC.objc_allocateClassPair(new ObjectiveCClass("NSObject"), pName, 0);
+ var test = ObjectiveC.class_addMethod(appDelegateClass, "applicationDidFinishLaunching:", delegatePtr, pTypes);
+ ObjectiveC.objc_registerClassPair(appDelegateClass);
+
+ NativePtr = new ObjectiveCClass(appDelegateClass).AllocInit();
+ }
+ }
+ }
+ }
+}

src/SharpMetal.ObjectiveCCore/ObjectiveC.cs

@@ -15,6 +15,16 @@ public static partial class ObjectiveC
  [LibraryImport("libdl.dylib", StringMarshalling = StringMarshalling.Utf8)]
  private static partial void dlopen(string path, int mode);
 
+ [LibraryImport(ObjCRuntime)]
+ public static unsafe partial IntPtr objc_allocateClassPair(IntPtr superclass, char* name, int extraBytes);
+
+ [LibraryImport(ObjCRuntime)]
+ [return: MarshalAs(UnmanagedType.Bool)]
+ public static unsafe partial bool class_addMethod(IntPtr cls, Selector selector, IntPtr imp, char* types);
+
+ [LibraryImport(ObjCRuntime)]
+ public static partial void objc_registerClassPair(IntPtr cls);
+
  [LibraryImport(ObjCRuntime, EntryPoint = "objc_msgSend")]
  public static partial void objc_msgSend(IntPtr receiver, Selector selector);