chore: Adjust TimePicker logic for Skia

# Conflicts:
#	src/Uno.UI/UI/Xaml/Media/ThemeShadow.cs

src/Uno.UI/UI/Xaml/Controls/Primitives/PickerFlyoutBase.cs

@@ -24,7 +24,7 @@ public static void SetTitle(DependencyObject element, string value)
 			element.SetValue(TitleProperty, value);
 		}
 
-		protected virtual void OnConfirmed() => throw new InvalidOperationException();
+		protected virtual void OnConfirmed() => Hide();
 
 		protected virtual bool ShouldShowConfirmationButtons() => throw new InvalidOperationException();
 

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePicker.nonref.cs

@@ -45,6 +45,7 @@ public TimePicker()
 			ResourceResolver.ApplyResource(this, LightDismissOverlayBackgroundProperty, "TimePickerLightDismissOverlayBackground", isThemeResourceExtension: true, isHotReloadSupported: false);
 
 			DefaultStyleKey = typeof(TimePicker);
+			InitPartial();
 		}
 
 		#region Time DependencyProperty

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePicker.partial.mux.cs

@@ -77,6 +77,7 @@ public TimePicker()
 		m_reactionToSelectionChangeAllowed = false;
 		m_defaultTime = new TimeSpan(GetNullTimeSentinelValue());
 		m_currentTime = new TimeSpan(GetNullTimeSentinelValue());
+		InitPartial();
 		PrepareState();
 	}
 
@@ -120,11 +121,6 @@ private void PrepareState()
 		RefreshSetup();
 
 		Loaded += OnLoaded;
-
-		if (pCurrentWindow is not null)
-		{
-			v
-		}
 	}
 
 	private void OnLoaded(object sender, RoutedEventArgs e)

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePickerFlyout.Properties.cs

@@ -22,7 +22,7 @@ public string ClockIdentifier
 			typeof(string),
 			typeof(TimePickerFlyout),
 			new FrameworkPropertyMetadata(
-				defaultValue: (string)Windows.Globalization.ClockIdentifiers.TwelveHour,
+				defaultValue: (string)TimePickerFlyout.GetDefaultClockIdentifier(),
 				options: FrameworkPropertyMetadataOptions.None)
 		);
 
@@ -38,7 +38,7 @@ public int MinuteIncrement
 			typeof(int),
 			typeof(TimePickerFlyout),
 			new FrameworkPropertyMetadata(
-				defaultValue: (int)1,
+				defaultValue: (int)TimePickerFlyout.GetDefaultMinuteIncrement(),
 				options: FrameworkPropertyMetadataOptions.None)
 		);
 
@@ -54,7 +54,7 @@ public TimeSpan Time
 			typeof(TimeSpan),
 			typeof(TimePickerFlyout),
 			new FrameworkPropertyMetadata(
-				defaultValue: (TimeSpan)DateTime.Now.TimeOfDay,
+				defaultValue: (TimeSpan)TimePickerFlyout.GetDefaultTime(),
 				options: FrameworkPropertyMetadataOptions.None)
 		);
 

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePickerFlyout.partial.mux.cs

@@ -230,7 +230,7 @@ private void OnKeyDown(object pSender, KeyRoutedEventArgs pEventArgs)
 		}
 	}
 
-	private object GetDefaultTime()
+	private static TimeSpan GetDefaultTime()
 	{
 		TimeSpan retTimeSpan = default;
 
@@ -276,12 +276,12 @@ private object GetDefaultTime()
 		return retTimeSpan;
 	}
 
-	private object GetDefaultClockIdentifier()
+	private static string GetDefaultClockIdentifier()
 	{
 		var spFormatter = new DateTimeFormatter(s_strHourFormat);
 
 		return spFormatter.Clock;
 	}
 
-	private object GetDefaultMinuteIncrement() => 1;
+	private static int GetDefaultMinuteIncrement() => 1;
 }

src/Uno.UI/UI/Xaml/Controls/TimePicker/TimePickerFlyoutPresenter.partial.mux.cs

@@ -53,9 +53,9 @@ partial class TimePickerFlyoutPresenter
 	private const string _strHourFormat = "{hour.integer(1)}";
 	private const string _strMinuteFormat = "{minute.integer(2)}";
 	private const string _strPeriodFormat = "{period.abbreviated(2)}";
-	private const long _timeSpanTicksPerMinute = 60000000;
-	private const long _timeSpanTicksPerHour = 3600000000;
-	private const long _timeSpanTicksPerDay = 86400000000;
+	private const long _timeSpanTicksPerMinute = 600000000;
+	private const long _timeSpanTicksPerHour = 36000000000;
+	private const long _timeSpanTicksPerDay = 864000000000;
 	internal const int _periodCoercionOffset = 12;
 	private const string _firstPickerHostName = "FirstPickerHost";
 	private const string _secondPickerHostName = "SecondPickerHost";

src/Uno.UI/UI/Xaml/Media/ThemeShadow.cs

@@ -1,25 +1,28 @@
-namespace Microsoft.UI.Xaml.Media
+namespace Microsoft.UI.Xaml.Media;
+
+/// <summary>
+/// A ThemeShadow is a preconfigured shadow effect that can be applied to any XAML element to draw shadows appropriately based on x,y,z coordinates.
+/// ThemeShadow also automatically adjusts for other environmental specifications.
+/// - Adapts to changes in lighting, user theme, app environment, and shell.
+/// - Shadows elements automatically based on their elevation.
+/// - Keeps elements in sync as they move and change elevation.
+/// - Keeps shadows consistent throughout and across applications.
+/// </summary>
+public partial class ThemeShadow : Shadow
 {
 	/// <summary>
-	/// A ThemeShadow is a preconfigured shadow effect that can be applied to any XAML element to draw shadows appropriately based on x,y,z coordinates.
-	/// ThemeShadow also automatically adjusts for other environmental specifications.
-	/// - Adapts to changes in lighting, user theme, app environment, and shell.
-	/// - Shadows elements automatically based on their elevation.
-	/// - Keeps elements in sync as they move and change elevation.
-	/// - Keeps shadows consistent throughout and across applications.
+	/// Initializes a new instance of the ThemeShadow class.
 	/// </summary>
-	public partial class ThemeShadow : Shadow
+	public ThemeShadow()
 	{
-		/// <summary>
-		/// Initializes a new instance of the ThemeShadow class.
-		/// </summary>
-		public ThemeShadow()
-		{
-		}
-
-		/// <summary>
-		/// Gets a collection of UI elements that this ThemeShadow is cast on.
-		/// </summary>
-		public UIElementWeakCollection Receivers { get; } = new UIElementWeakCollection();
 	}
+
+	/// <summary>
+	/// Gets a collection of UI elements that this ThemeShadow is cast on.
+	/// </summary>
+	public UIElementWeakCollection Receivers { get; } = new UIElementWeakCollection();
+
+	// Lifted Xaml had an old projected shadow code path that we're keeping around (disabled) as insurance. All shadows
+	// are going through the drop shadow code path, hence we just return true here.
+	internal static bool IsDropShadowMode => true;
 }