Add guard around WinUI 3 ProtectedCursor property for Uno

Author: michael-hawker

labs/SizerBase/src/SizerBase.Properties.cs

@@ -113,7 +113,9 @@ private static void OnOrientationPropertyChanged(DependencyObject d, DependencyP
                 return;
             }
 
-#if WINAPPSDK
+            // TODO: [UNO] Only supported on certain platforms
+            // See ProtectedCursor here: https://github.com/unoplatform/uno/blob/3fe3862b270b99dbec4d830b547942af61b1a1d9/src/Uno.UI/UI/Xaml/UIElement.cs#L1015-L1023
+#if WINAPPSDK && !HAS_UNO
             // Need to wait until we're at least applying template step of loading before setting Cursor
             // See https://github.com/microsoft/microsoft-ui-xaml/issues/7062
             if (gripper._applyingTemplate &&

labs/SizerBase/src/SizerBase.cs

@@ -92,7 +92,8 @@ protected override AutomationPeer OnCreateAutomationPeer()
         return new SizerAutomationPeer(this);
     }
 
-#if WINAPPSDK
+// On Uno the ProtectedCursor isn't supported yet, so we don't need this value.
+#if WINAPPSDK && !HAS_UNO
     // Used to track when we're in the OnApplyTemplateStep to change ProtectedCursor value.
     private bool _applyingTemplate = false;
 #endif
@@ -124,7 +125,7 @@ protected override void OnApplyTemplate()
 
         // Trigger initial state transition based on if we're Enabled or not currently.
         SizerBase_IsEnabledChanged(this, null!);
-#if WINAPPSDK
+#if WINAPPSDK && !HAS_UNO
         // On WinAppSDK, we'll trigger this to setup the initial ProtectedCursor value.
         _applyingTemplate = true;
 #endif

labs/SizerBase/src/Toolkit/FrameworkElementExtensions.Mouse.cs

@@ -85,7 +85,8 @@ private static void CursorChanged(DependencyObject d, DependencyPropertyChangedE
 #if !WINAPPSDK
     private static void Element_PointerEntered(object sender, PointerRoutedEventArgs e)
     {
-        // TODO [UNO] Only supported on certain platforms
+        // TODO: [UNO] Only supported on certain platforms
+        // See PointerCursor here: https://github.com/unoplatform/uno/blob/3fe3862b270b99dbec4d830b547942af61b1a1d9/src/Uno.UWP/UI/Core/CoreWindow.cs#L71-L77
 #if __NETFX_CORE__ || __WASM__ || __MACOS__ || __SKIA__
         CoreCursorType cursor = GetCursor((FrameworkElement)sender);
         Window.Current.CoreWindow.PointerCursor = _cursors[cursor];