Implement Alerts (Alert, Prompt and ActionSheet)

src/Compatibility/Core/src/WinUI/FormsFlyout.xaml.cs

@@ -21,18 +21,18 @@ public FormsFlyout(ActionSheetArguments sheetOptions)
 			TitleBlock.Text = options.Title ?? string.Empty;
 			OptionsList.ItemsSource = options.Buttons.ToList();
 
-			if (options.FlowDirection == Microsoft.Maui.Controls.FlowDirection.RightToLeft)
+			if (options.FlowDirection == Maui.FlowDirection.RightToLeft)
 			{
-				TitleBlock.FlowDirection = Microsoft.UI.Xaml.FlowDirection.RightToLeft;
-				OptionsList.FlowDirection = Microsoft.UI.Xaml.FlowDirection.RightToLeft;
+				TitleBlock.FlowDirection = UI.Xaml.FlowDirection.RightToLeft;
+				OptionsList.FlowDirection = UI.Xaml.FlowDirection.RightToLeft;
 			}
-			else if (options.FlowDirection == Microsoft.Maui.Controls.FlowDirection.LeftToRight)
+			else if (options.FlowDirection == Maui.FlowDirection.LeftToRight)
 			{
-				TitleBlock.FlowDirection = Microsoft.UI.Xaml.FlowDirection.LeftToRight;
-				OptionsList.FlowDirection = Microsoft.UI.Xaml.FlowDirection.LeftToRight;
+				TitleBlock.FlowDirection = UI.Xaml.FlowDirection.LeftToRight;
+				OptionsList.FlowDirection = UI.Xaml.FlowDirection.LeftToRight;
 			}
 
-			if (options.FlowDirection == Microsoft.Maui.Controls.FlowDirection.RightToLeft)
+			if (options.FlowDirection == Maui.FlowDirection.RightToLeft)
 			{
 				if (options.Cancel != null)
 				{

src/Controls/samples/Controls.Sample/Pages/MainPage.cs

@@ -81,6 +81,7 @@ void SetupMauiLayout()
 			verticalStack.Add(CreateTransformations());
 			verticalStack.Add(CreateAnimations());
 			verticalStack.Add(CreateShapes());
+			verticalStack.Add(CreateAlerts());
 
 			verticalStack.Add(new Label { Text = " ", Padding = new Thickness(10) });
 			var label = new Label { Text = "End-aligned text", BackgroundColor = Colors.Fuchsia, HorizontalTextAlignment = TextAlignment.End };
@@ -275,6 +276,7 @@ void SetupMauiLayout()
 			verticalStack.Add(picker);
 
 			verticalStack.Add(new Slider());
+			verticalStack.Add(new Slider { MinimumTrackColor = Colors.Orange, MaximumTrackColor = Colors.Purple, ThumbColor = Colors.GreenYellow });
 			verticalStack.Add(new Slider { ThumbImageSource = "dotnet_bot.png" });
 
 			verticalStack.Add(new Stepper());
@@ -601,6 +603,59 @@ IView CreateShapes()
 			return verticalStack;
 		}
 
+		IView CreateAlerts()
+		{
+			var simpleAlertButton = new Button { Text = "Simple Alert" };
+
+			simpleAlertButton.Clicked += async (sender, args) =>
+			{
+				await DisplayAlert("Alert", "You have been alerted", "OK");
+			};
+
+			var yesNoAlertButton = new Button { Text = "Yes/No Alert" };
+
+			yesNoAlertButton.Clicked += async (sender, args) =>
+			{
+				bool answer = await DisplayAlert("Question?", "Would you like to play a game", "Yes", "No");
+				Debug.WriteLine("Answer: " + answer);
+			};
+
+			var simpleActionSheetButton = new Button { Text = "Simple ActionSheet" };
+
+			simpleActionSheetButton.Clicked += async (sender, args) =>
+			{
+				string action = await DisplayActionSheet("ActionSheet: Send to?", "Cancel", null, "Email", "Twitter", "Facebook");
+				Debug.WriteLine("Action: " + action);
+			};
+
+			var cancelDeleteActionSheetButton = new Button { Text = "Cancel/Delete ActionSheet" };
+
+			cancelDeleteActionSheetButton.Clicked += async (sender, args) =>
+			{
+				string action = await DisplayActionSheet("ActionSheet: SavePhoto?", "Cancel", "Delete", "Photo Roll", "Email");
+				Debug.WriteLine("Action: " + action);
+			};
+
+			var simplePromptButton = new Button { Text = "Simple Prompt" };
+
+			simplePromptButton.Clicked += async (sender, args) =>
+			{
+				string action = await DisplayPromptAsync("Question 1", "What's your name?");
+				Debug.WriteLine("Action: " + action);
+			};
+
+			var verticalStack = new VerticalStackLayout
+			{
+				simpleAlertButton,
+				yesNoAlertButton,
+				simpleActionSheetButton,
+				cancelDeleteActionSheetButton,
+				simplePromptButton
+			};
+
+			return verticalStack;
+		}
+
 		void AddTextResizeDemo(Microsoft.Maui.ILayout layout)
 		{
 			var resizeTestButton = new Button { Text = "Resize Test" };
@@ -687,4 +742,4 @@ public void Draw(ICanvas canvas, RectangleF dirtyRect)
 			}
 		}
 	}
-}
+}

src/Controls/src/Core/FlowDirection.cs → src/Controls/src/Core/FlowDirectionConverter.cs

@@ -2,14 +2,6 @@
 
 namespace Microsoft.Maui.Controls
 {
-	[TypeConverter(typeof(FlowDirectionConverter))]
-	public enum FlowDirection
-	{
-		MatchParent = 0,
-		LeftToRight = 1,
-		RightToLeft = 2,
-	}
-
 	[Xaml.TypeConversion(typeof(FlowDirection))]
 	public class FlowDirectionConverter : TypeConverter
 	{

src/Controls/src/Core/Page.cs

@@ -13,13 +13,13 @@ namespace Microsoft.Maui.Controls
 {
 	public partial class Page : VisualElement, ILayout, IPageController, IElementConfiguration<Page>, IPaddingElement
 	{
-		public const string BusySetSignalName = "Microsoft.Maui.Controls.BusySet";
+		public const string BusySetSignalName = AlertConstants.BusySetSignalName;
 
-		public const string AlertSignalName = "Microsoft.Maui.Controls.SendAlert";
+		public const string AlertSignalName = AlertConstants.AlertSignalName;
 
-		public const string PromptSignalName = "Microsoft.Maui.Controls.SendPrompt";
+		public const string PromptSignalName = AlertConstants.PromptSignalName;
 
-		public const string ActionSheetSignalName = "Microsoft.Maui.Controls.ShowActionSheet";
+		public const string ActionSheetSignalName = AlertConstants.ActionSheetSignalName;
 
 		internal static readonly BindableProperty IgnoresContainerAreaProperty = BindableProperty.Create("IgnoresContainerArea", typeof(bool), typeof(Page), false);
 
@@ -165,9 +165,9 @@ public Task<string> DisplayActionSheet(string title, string cancel, string destr
 			args.FlowDirection = flowDirection;
 
 			if (IsPlatformEnabled)
-				MessagingCenter.Send(this, ActionSheetSignalName, args);
+				MessagingCenter.Send((IPage)this, ActionSheetSignalName, args);
 			else
-				_pendingActions.Add(() => MessagingCenter.Send(this, ActionSheetSignalName, args));
+				_pendingActions.Add(() => MessagingCenter.Send((IPage)this, ActionSheetSignalName, args));
 
 			return args.Result.Task;
 		}
@@ -196,9 +196,9 @@ public Task<bool> DisplayAlert(string title, string message, string accept, stri
 			args.FlowDirection = flowDirection;
 
 			if (IsPlatformEnabled)
-				MessagingCenter.Send(this, AlertSignalName, args);
+				MessagingCenter.Send((IPage)this, AlertSignalName, args);
 			else
-				_pendingActions.Add(() => MessagingCenter.Send(this, AlertSignalName, args));
+				_pendingActions.Add(() => MessagingCenter.Send((IPage)this, AlertSignalName, args));
 
 			return args.Result.Task;
 		}
@@ -208,9 +208,9 @@ public Task<bool> DisplayAlert(string title, string message, string accept, stri
 			var args = new PromptArguments(title, message, accept, cancel, placeholder, maxLength, keyboard, initialValue);
 
 			if (IsPlatformEnabled)
-				MessagingCenter.Send(this, PromptSignalName, args);
+				MessagingCenter.Send((IPage)this, PromptSignalName, args);
 			else
-				_pendingActions.Add(() => MessagingCenter.Send(this, PromptSignalName, args));
+				_pendingActions.Add(() => MessagingCenter.Send((IPage)this, PromptSignalName, args));
 
 			return args.Result.Task;
 		}
@@ -413,9 +413,9 @@ public void SendAppearing()
 			if (IsBusy)
 			{
 				if (IsPlatformEnabled)
-					MessagingCenter.Send(this, BusySetSignalName, true);
+					MessagingCenter.Send((IPage)this, BusySetSignalName, true);
 				else
-					_pendingActions.Add(() => MessagingCenter.Send(this, BusySetSignalName, true));
+					_pendingActions.Add(() => MessagingCenter.Send((IPage)this, BusySetSignalName, true));
 			}
 
 			OnAppearing();
@@ -436,7 +436,7 @@ public void SendDisappearing()
 			_hasAppeared = false;
 
 			if (IsBusy)
-				MessagingCenter.Send(this, BusySetSignalName, false);
+				MessagingCenter.Send((IPage)this, BusySetSignalName, false);
 
 			var pageContainer = this as IPageContainer<Page>;
 			pageContainer?.CurrentPage?.SendDisappearing();
@@ -493,7 +493,7 @@ void OnPageBusyChanged()
 			if (!_hasAppeared)
 				return;
 
-			MessagingCenter.Send(this, BusySetSignalName, IsBusy);
+			MessagingCenter.Send((IPage)this, BusySetSignalName, IsBusy);
 		}
 
 		void OnToolbarItemsCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)

src/Controls/src/Core/TypeConverterAttribute.cs

@@ -50,6 +50,7 @@ public sealed class TypeConverterAttribute : Attribute
 			{ typeof(CornerRadius), typeof(CornerRadiusTypeConverter) },
 			{ typeof(Color), typeof(ColorTypeConverter) },
 			{ typeof(Font), typeof(FontTypeConverter) },
+			{ typeof(FlowDirection), typeof(FlowDirectionConverter) },
 			{ typeof(Keyboard), typeof(KeyboardTypeConverter) },
 			{ typeof(Rectangle), typeof(RectangleTypeConverter) },
 			{ typeof(Size), typeof(SizeTypeConverter) },