Improve shared MAUI controls and tests

SacsMobileMaui/Maui/Utils/SamThreadUtil.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
+using System;
 using System.Threading.Tasks;
 
 namespace Sarand.Net.Mobile.Maui.Utils
@@ -19,12 +16,10 @@ namespace Sarand.Net.Mobile.Maui.Utils
 			return MainThread.IsMainThread;
 		}
 
-		//-------------------------------------------------------------------
-		//    I n v o k e   o n   M a i n   T h r e a d   a n d   W a i t
-		//-------------------------------------------------------------------
+		// --- Fire-and-forget dispatch ---
 
-		/// <summary>Invoke task on main thread.</summary>
-		public static void InvokeOnMainThread(Action taskFn)
+		/// <summary>Invoke an action on the main thread without waiting for completion.</summary>
+		public static void PostToMainThread(Action taskFn)
 		{
 			MainThread.BeginInvokeOnMainThread(() =>
 			{
@@ -32,38 +27,32 @@ namespace Sarand.Net.Mobile.Maui.Utils
 			});
 		}
 
-		/// <summary>Invoke task on main thread and wait for completion.</summary>
-		public static void InvokeOnMainThreadSync(Action taskFn)
+		// --- Awaitable dispatch ---
+
+		/// <summary>Invoke an action on the main thread and await its completion.</summary>
+		public static Task InvokeOnMainThreadAsync(Action taskFn)
 		{
-			var tcs = new TaskCompletionSource<Object>();
-			MainThread.BeginInvokeOnMainThread(() =>
-			{
-				try
-				{
-					taskFn();
-					tcs.SetResult(true);
-				}
-				catch (Exception ex) { tcs.SetException(ex); }
-			});
+			return MainThread.InvokeOnMainThreadAsync(taskFn);
 		}
 
-		/// <summary>Invoke task on main thread and wait for completion.</summary>
-		public static T InvokeOnMainThreadSync<T>(Func<T> taskFn)
+		/// <summary>Invoke an asynchronous function on the main thread and await its completion.</summary>
+		public static Task InvokeOnMainThreadAsync(Func<Task> taskFn)
 		{
-			var tcs = new TaskCompletionSource<T>();
-			MainThread.BeginInvokeOnMainThread(() =>
-			{
-				try
-				{
-					var result = taskFn();
-					tcs.SetResult(result);
-				}
-				catch (Exception ex) { tcs.SetException(ex); }
-			});
-			return tcs.Task.Result;
+			return MainThread.InvokeOnMainThreadAsync(taskFn);
 		}
 
-		//-------------------------------------------------------------------
+		/// <summary>Invoke a function on the main thread and await its result.</summary>
+		public static Task<T> InvokeOnMainThreadAsync<T>(Func<T> taskFn)
+		{
+			return MainThread.InvokeOnMainThreadAsync(taskFn);
+		}
+
+		/// <summary>Invoke an asynchronous function on the main thread and await its result.</summary>
+		public static Task<T> InvokeOnMainThreadAsync<T>(Func<Task<T>> taskFn)
+		{
+			return MainThread.InvokeOnMainThreadAsync(taskFn);
+		}
+
+		// --- The End ---
 	}
-	//=======================================================================
 }