Add Avalonia MessageBox

Source/LibationWinForms/AvaloniaUI/ViewModels/Dialogs/MessageBoxViewModel.cs

@@ -0,0 +1,77 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Media;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace LibationWinForms.AvaloniaUI.ViewModels.Dialogs
+{
+	public class MessageBoxViewModel
+	{
+		private string _message;
+		public string Message { get { return _message; } set { _message = value; } }
+		public string Caption { get; } = "Message Box";
+		private MessageBoxButtons _button;
+		private MessageBoxIcon _icon;
+		private MessageBoxDefaultButton _defaultButton;
+
+		public MessageBoxButtons Buttons => _button;
+
+		public bool IsAsterisk => _icon == MessageBoxIcon.Asterisk;
+		public bool IsError => _icon == MessageBoxIcon.Error;
+		public bool IsQuestion => _icon == MessageBoxIcon.Question;
+		public bool IsExclamation => _icon == MessageBoxIcon.Exclamation;
+
+		public bool HasButton3 => !string.IsNullOrEmpty(Button3Text);
+		public bool HasButton2 => !string.IsNullOrEmpty(Button2Text);
+
+		public int WindowHeight { get;private set; }
+		public int WindowWidth { get;private set; }
+
+		public string Button1Text => _button switch
+		{
+			MessageBoxButtons.OK => "OK",
+			MessageBoxButtons.OKCancel => "OK",
+			MessageBoxButtons.AbortRetryIgnore => "Abort",
+			MessageBoxButtons.YesNoCancel => "Yes",
+			MessageBoxButtons.YesNo => "Yes",
+			MessageBoxButtons.RetryCancel => "Retry",
+			MessageBoxButtons.CancelTryContinue => "Cancel",
+			_ => string.Empty,
+		};
+
+		public string Button2Text => _button switch
+		{
+			MessageBoxButtons.OKCancel => "Cancel",
+			MessageBoxButtons.AbortRetryIgnore => "Retry",
+			MessageBoxButtons.YesNoCancel => "No",
+			MessageBoxButtons.YesNo => "No",
+			MessageBoxButtons.RetryCancel => "Cancel",
+			MessageBoxButtons.CancelTryContinue => "Try",
+			_ => string.Empty,
+		};
+		
+		public string Button3Text => _button switch
+		{
+			MessageBoxButtons.AbortRetryIgnore => "Ignore",
+			MessageBoxButtons.YesNoCancel => "Cancel",
+			MessageBoxButtons.CancelTryContinue => "Continue",
+			_ => string.Empty,
+		};
+
+		public MessageBoxViewModel() { }
+		public MessageBoxViewModel(string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultBtn)
+		{
+
+			Message = message;
+			Caption = caption;
+			_button = buttons;
+			_icon = icon;
+			_defaultButton = defaultBtn;
+		}
+	}
+}

Source/LibationWinForms/AvaloniaUI/ViewModels/MainWindowViewModel.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace LibationWinForms.AvaloniaUI.ViewModels
+{
+	public class MainWindowViewModel
+	{
+	}
+}

Source/LibationWinForms/AvaloniaUI/ViewModels/ProcessBook2.cs

@@ -9,6 +9,7 @@ using DataLayer;
 using Dinah.Core;
 using FileLiberator;
 using LibationFileManager;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using ReactiveUI;
 
 namespace LibationWinForms.AvaloniaUI.ViewModels
@@ -152,7 +153,7 @@ namespace LibationWinForms.AvaloniaUI.ViewModels
 			finally
 			{
 				if (Result == ProcessBookResult.None)
-					Result = showRetry(LibraryBook);
+					Result = await showRetry(LibraryBook);
 
 				Status = Result switch
 				{
@@ -313,15 +314,15 @@ namespace LibationWinForms.AvaloniaUI.ViewModels
 
 		#region Failure Handler
 
-		private ProcessBookResult showRetry(LibraryBook libraryBook)
+		private async Task<ProcessBookResult> showRetry(LibraryBook libraryBook)
 		{
 			Logger.Error("ERROR. All books have not been processed. Most recent book: processing failed");
 
-			System.Windows.Forms.DialogResult? dialogResult = Configuration.Instance.BadBook switch
+			DialogResult? dialogResult = Configuration.Instance.BadBook switch
 			{
-				Configuration.BadBookAction.Abort => System.Windows.Forms.DialogResult.Abort,
-				Configuration.BadBookAction.Retry => System.Windows.Forms.DialogResult.Retry,
-				Configuration.BadBookAction.Ignore => System.Windows.Forms.DialogResult.Ignore,
+				Configuration.BadBookAction.Abort => DialogResult.Abort,
+				Configuration.BadBookAction.Retry => DialogResult.Retry,
+				Configuration.BadBookAction.Ignore => DialogResult.Ignore,
 				Configuration.BadBookAction.Ask => null,
 				_ => null
 			};
@@ -346,9 +347,9 @@ $@"  Title: {libraryBook.Book.Title}
 			}
 
 			// if null then ask user
-			dialogResult ??= System.Windows.Forms.MessageBox.Show(string.Format(SkipDialogText + "\r\n\r\nSee Settings to avoid this box in the future.", details), "Skip importing this book?", SkipDialogButtons, System.Windows.Forms.MessageBoxIcon.Question, SkipDialogDefaultButton);
+			dialogResult ??= await MessageBox.Show(string.Format(SkipDialogText + "\r\n\r\nSee Settings to avoid this box in the future.", details), "Skip importing this book?", SkipDialogButtons, MessageBoxIcon.Question, SkipDialogDefaultButton);
 
-			if (dialogResult == System.Windows.Forms.DialogResult.Abort)
+			if (dialogResult == DialogResult.Abort)
 				return ProcessBookResult.FailedAbort;
 
 			if (dialogResult == SkipResult)
@@ -373,9 +374,9 @@ An error occurred while trying to process this book.
 
 - IGNORE: Permanently ignore this book. Continue processing books. (Will not try this book again later.)
 ".Trim();
-		private System.Windows.Forms.MessageBoxButtons SkipDialogButtons => System.Windows.Forms.MessageBoxButtons.AbortRetryIgnore;
-		private System.Windows.Forms.MessageBoxDefaultButton SkipDialogDefaultButton => System.Windows.Forms.MessageBoxDefaultButton.Button1;
-		private System.Windows.Forms.DialogResult SkipResult => System.Windows.Forms.DialogResult.Ignore;
+		private MessageBoxButtons SkipDialogButtons => MessageBoxButtons.AbortRetryIgnore;
+		private MessageBoxDefaultButton SkipDialogDefaultButton => MessageBoxDefaultButton.Button1;
+		private DialogResult SkipResult => DialogResult.Ignore;
 	}
 
 	#endregion

Source/LibationWinForms/AvaloniaUI/Views/Dialogs/MessageBox.cs

@@ -0,0 +1,240 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.ApplicationLifetimes;
+using LibationWinForms.AvaloniaUI.ViewModels.Dialogs;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace LibationWinForms.AvaloniaUI.Views.Dialogs
+{
+	public class MessageBox
+	{
+
+		/// <summary>Displays a message box with the specified text, caption, buttons, icon, and default button.</summary>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
+		/// <param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
+		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
+		/// -or-  
+		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.  
+		/// -or-  
+		/// <paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
+		{
+			return await ShowCore(null, text, caption, buttons, icon, defaultButton);
+		}
+
+
+		/// <summary>Displays a message box with specified text, caption, buttons, and icon.</summary>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">The <paramref name="buttons" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
+		///  -or-  
+		///  The <paramref name="icon" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)
+		{
+			return await ShowCore(null, text, caption, buttons, icon, MessageBoxDefaultButton.Button1);
+		}
+
+
+		/// <summary>Displays a message box with specified text, caption, and buttons.</summary>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">The <paramref name="buttons" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons)
+		{
+			return await ShowCore(null, text, caption, buttons, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+
+		/// <summary>Displays a message box with specified text and caption.</summary>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		public static async Task<DialogResult> Show(string text, string caption)
+		{
+			return await ShowCore(null, text, caption, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+		/// <summary>Displays a message box with specified text.</summary>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		public static async Task<DialogResult> Show(string text)
+		{
+			return await ShowCore(null, text, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+
+		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, icon, default button, and options.</summary>
+		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
+		/// <param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values the specifies the default button for the message box.</param>
+		/// <param name="options">One of the <see cref="T:System.Windows.Forms.MessageBoxOptions" /> values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
+		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
+		/// -or-  
+		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.  
+		/// -or-  
+		/// <paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		/// <exception cref="T:System.ArgumentException">		
+		/// -or-  
+		/// <paramref name="buttons" /> specified an invalid combination of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
+		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
+		{
+			return await ShowCore(owner, text, caption, buttons, icon, defaultButton);
+		}
+
+
+		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, and icon.</summary>
+		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
+		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
+		/// -or-  
+		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)
+		{
+			return await ShowCore(owner, text, caption, buttons, icon, MessageBoxDefaultButton.Button1);
+		}
+
+		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, and buttons.</summary>
+		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
+		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
+		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
+		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons)
+		{
+			return await ShowCore(owner, text, caption, buttons, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+		/// <summary>Displays a message box in front of the specified object and with the specified text and caption.</summary>
+		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <param name="caption">The text to display in the title bar of the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		public static async Task<DialogResult> Show(Window owner, string text, string caption)
+		{
+			return await ShowCore(owner, text, caption, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+		/// <summary>Displays a message box in front of the specified object and with the specified text.</summary>
+		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
+		/// <param name="text">The text to display in the message box.</param>
+		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
+		public static async Task<DialogResult> Show(Window owner, string text)
+		{
+			return await ShowCore(owner, text, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
+		}
+
+		private static async Task<DialogResult> ShowCore(Window owner, string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
+		{
+			if (Avalonia.Threading.Dispatcher.UIThread.CheckAccess())
+				return await ShowCore2(owner, message, caption, buttons, icon, defaultButton);
+			else
+				return await Avalonia.Threading.Dispatcher.UIThread.InvokeAsync(() => ShowCore2(owner, message, caption, buttons, icon, defaultButton));
+
+		}
+		private static async Task<DialogResult> ShowCore2(Window owner, string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
+		{
+			var dialog = new MessageBoxWindow();
+			var vm = new MessageBoxViewModel(message, caption, buttons, icon, defaultButton);
+			dialog.DataContext = vm;
+			dialog.CanResize = false;
+
+			var thisScreen = (owner ?? dialog).Screens.ScreenFromVisual(owner ?? dialog);
+			var tbx = dialog.FindControl<TextBlock>("messageTextBlock");
+			tbx.Text = message;
+
+			var maxSize = new Size(0.6 * thisScreen.Bounds.Width - 72, 0.9 * thisScreen.Bounds.Height);
+
+			var desiredMax = maxSize;
+
+			//Try to minimize the TextBlock area.
+			List<(double, Size)> areas = new();
+			for (int i = 0; i < 20; i++)
+			{
+				tbx.Measure(desiredMax);
+
+				var area = tbx.DesiredSize.Width * tbx.DesiredSize.Height;
+				areas.Add((area, new Size(tbx.DesiredSize.Width, tbx.DesiredSize.Height)));
+
+				if (tbx.DesiredSize.Height < maxSize.Height - 20)
+				{
+					if (desiredMax.Width / 2 < tbx.MinWidth)
+						desiredMax = new Size(desiredMax.Width * 1.5 + 1, desiredMax.Height);
+					else
+						desiredMax = new Size(desiredMax.Width / 2, desiredMax.Height);
+				}
+			}
+
+			var min = areas.Min(a => a.Item1);
+			var mindim = areas.First(a => a.Item1 == min);
+
+			var desiredSize = new Size(dialog.MinWidth - tbx.MinWidth + mindim.Item2.Width, dialog.MinHeight - tbx.MinHeight + mindim.Item2.Height);
+
+			dialog.Width = desiredSize.Width;
+			dialog.Height = desiredSize.Height;
+			tbx.Width = mindim.Item2.Width;
+			tbx.Height = mindim.Item2.Height;
+
+			if (owner is null)
+			{
+				if (Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+				{
+					return await dialog.ShowDialog<DialogResult>(desktop.MainWindow);
+				}
+				else
+				{
+					var window = new Window
+					{
+						IsVisible = false,
+						Height = 1,
+						Width = 1,
+						SystemDecorations = SystemDecorations.None,
+						ShowInTaskbar = false
+					};
+
+					window.Show();
+					var result = await dialog.ShowDialog<DialogResult>(window);
+					window.Close();
+					return result;
+				}
+
+			}
+			else
+			{
+				return await dialog.ShowDialog<DialogResult>(owner);
+			}
+		}
+	}
+}

Source/LibationWinForms/AvaloniaUI/Views/Dialogs/MessageBoxWindow.axaml

@@ -0,0 +1,41 @@
+<Window xmlns="https://github.com/avaloniaui"
+		xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+		xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+		xmlns:vm="clr-namespace:LibationWinForms.AvaloniaUI.ViewModels"
+		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        mc:Ignorable="d" d:DesignWidth="375" d:DesignHeight="130" MinWidth="385" MinHeight="150"
+        x:Class="LibationWinForms.AvaloniaUI.Views.Dialogs.MessageBoxWindow"
+        Title="{Binding Caption}" HasSystemDecorations="True" ShowInTaskbar="True">
+	<Grid ColumnDefinitions="*" RowDefinitions="*,Auto">
+
+		<StackPanel Orientation="Horizontal"
+			Grid.Row="0" Grid.Column="0"
+			Margin="10" VerticalAlignment="Top">
+			
+			<Panel
+				Grid.Column="0"
+				Margin="10" VerticalAlignment="Top">
+				
+				<Image IsVisible="{Binding IsAsterisk}" Stretch="None" Source="/AvaloniaUI/Assets/MBIcons/Asterisk.png"/>
+				<Image IsVisible="{Binding IsError}" Stretch="None" Source="/AvaloniaUI/Assets/MBIcons/error.png"/>
+				<Image IsVisible="{Binding IsQuestion}" Stretch="None" Source="/AvaloniaUI/Assets/MBIcons/Question.png"/>
+				<Image IsVisible="{Binding IsExclamation}" Stretch="None" Source="/AvaloniaUI/Assets/MBIcons/Exclamation.png"/>
+			</Panel>
+			
+			<TextBlock Name="messageTextBlock" Background="Snow" MinHeight="80" MinWidth="300" TextWrapping="WrapWithOverflow" HorizontalAlignment="Left" VerticalAlignment="Top" FontSize="12" Text="{Binding Message}" />
+
+		</StackPanel>
+
+		<Grid Grid.Row="1" VerticalAlignment="Bottom" HorizontalAlignment="Right" Margin="0,0,15,10" ColumnDefinitions="Auto, Auto, Auto">
+			<Button Grid.Column="0" MinWidth="80" MinHeight="25" Name="Button1" Click="Button1_Click" Margin="5">
+				<TextBlock VerticalAlignment="Center" Text="{Binding Button1Text}"/>
+			</Button>
+			<Button Grid.Column="1" IsVisible="{Binding HasButton2}" MinWidth="80" MinHeight="25" Name="Button2" Click="Button2_Click" Margin="5">
+				<TextBlock VerticalAlignment="Center" Text="{Binding Button2Text}"/>
+			</Button>
+			<Button Grid.Column="2" IsVisible="{Binding HasButton3}" MinWidth="80" MinHeight="25" Name="Button3" Click="Button3_Click" Content="Cancel" Margin="5">
+				<TextBlock VerticalAlignment="Center" Text="{Binding Button3Text}"/>
+			</Button>
+		</Grid>
+	</Grid>
+</Window>

Source/LibationWinForms/AvaloniaUI/Views/Dialogs/MessageBoxWindow.axaml.cs

@@ -0,0 +1,115 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using Avalonia.ReactiveUI;
+using LibationWinForms.AvaloniaUI.ViewModels.Dialogs;
+
+namespace LibationWinForms.AvaloniaUI.Views.Dialogs
+{
+
+	public enum DialogResult
+	{
+		None = 0,
+		OK = 1,
+		Cancel = 2,
+		Abort = 3,
+		Retry = 4,
+		Ignore = 5,
+		Yes = 6,
+		No = 7,
+		TryAgain = 10,
+		Continue = 11
+	}
+
+
+	public enum MessageBoxIcon
+	{
+		None = 0,
+		Error = 16,
+		Hand = 16,
+		Stop = 16,
+		Question = 32,
+		Exclamation = 48,
+		Warning = 48,
+		Asterisk = 64,
+		Information = 64
+	}
+	public enum MessageBoxButtons
+	{
+		OK,
+		OKCancel,
+		AbortRetryIgnore,
+		YesNoCancel,
+		YesNo,
+		RetryCancel,
+		CancelTryContinue
+	}
+
+	public enum MessageBoxDefaultButton
+	{
+		Button1,
+		Button2 = 256,
+		Button3 = 512,
+	}
+	public partial class MessageBoxWindow : ReactiveWindow<MessageBoxViewModel>
+	{
+		public MessageBoxWindow()
+		{
+			InitializeComponent();
+#if DEBUG
+			this.AttachDevTools();
+#endif
+		}
+
+		private void InitializeComponent()
+		{
+			AvaloniaXamlLoader.Load(this);
+		}
+
+		public DialogResult DialogResult { get; private set; }
+
+		public void Button1_Click(object sender, Avalonia.Interactivity.RoutedEventArgs args)
+		{
+			var vm = DataContext as MessageBoxViewModel;
+			DialogResult = vm.Buttons switch
+			{
+				MessageBoxButtons.OK => DialogResult.OK,
+				MessageBoxButtons.OKCancel => DialogResult.OK,
+				MessageBoxButtons.AbortRetryIgnore => DialogResult.Abort,
+				MessageBoxButtons.YesNoCancel => DialogResult.Yes,
+				MessageBoxButtons.YesNo => DialogResult.Yes,
+				MessageBoxButtons.RetryCancel => DialogResult.Retry,
+				MessageBoxButtons.CancelTryContinue => DialogResult.Cancel,
+				_ => DialogResult.None
+			};
+			Close(DialogResult);
+		}
+		public void Button2_Click(object sender, Avalonia.Interactivity.RoutedEventArgs args)
+		{
+			var vm = DataContext as MessageBoxViewModel;
+			DialogResult = vm.Buttons switch
+			{
+				MessageBoxButtons.OKCancel => DialogResult.Cancel,
+				MessageBoxButtons.AbortRetryIgnore => DialogResult.Retry,
+				MessageBoxButtons.YesNoCancel => DialogResult.No,
+				MessageBoxButtons.YesNo => DialogResult.No,
+				MessageBoxButtons.RetryCancel => DialogResult.Cancel,
+				MessageBoxButtons.CancelTryContinue => DialogResult.TryAgain,
+				_ => DialogResult.None
+			};
+			Close(DialogResult);
+		}
+		public void Button3_Click(object sender, Avalonia.Interactivity.RoutedEventArgs args)
+		{
+			var vm = DataContext as MessageBoxViewModel;
+			DialogResult = vm.Buttons switch
+			{
+				MessageBoxButtons.AbortRetryIgnore => DialogResult.Ignore,
+				MessageBoxButtons.YesNoCancel => DialogResult.Cancel,
+				MessageBoxButtons.CancelTryContinue => DialogResult.Continue,
+				_ => DialogResult.None
+			};
+			Close(DialogResult);
+		}
+	}
+}

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.Export.axaml.cs

@@ -1,4 +1,5 @@
 using ApplicationServices;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using System;
 using System.Linq;
 
@@ -9,7 +10,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 	{
 		private void Configure_Export() { }
 
-		public void exportLibraryToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+		public async void exportLibraryToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
 			try
 			{
@@ -37,7 +38,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 						break;
 				}
 
-				System.Windows.Forms.MessageBox.Show("Library exported to:\r\n" + saveFileDialog.FileName);
+				await MessageBox.Show("Library exported to:\r\n" + saveFileDialog.FileName);
 			}
 			catch (Exception ex)
 			{

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.Filter.axaml.cs

@@ -1,7 +1,9 @@
 using Avalonia.Input;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using LibationWinForms.Dialogs;
 using System;
 using System.Linq;
+using System.Threading.Tasks;
 
 namespace LibationWinForms.AvaloniaUI.Views
 {
@@ -13,22 +15,22 @@ namespace LibationWinForms.AvaloniaUI.Views
 		public void filterHelpBtn_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 			=> new SearchSyntaxDialog().ShowDialog();
 		
-		public void filterSearchTb_KeyPress(object sender, KeyEventArgs e)
+		public async void filterSearchTb_KeyPress(object sender, KeyEventArgs e)
 		{
 			if (e.Key == Key.Return)
 			{
-				performFilter(this.filterSearchTb.Text);
+				await performFilter(this.filterSearchTb.Text);
 
 				// silence the 'ding'
 				e.Handled = true;
 			}
 		}
 
-		public void filterBtn_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
-			=> performFilter(this.filterSearchTb.Text);
+		public async void filterBtn_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+			=> await performFilter(this.filterSearchTb.Text);
 
 		private string lastGoodFilter = "";
-		private void performFilter(string filterString)
+		private async Task performFilter(string filterString)
 		{
 			this.filterSearchTb.Text = filterString;
 
@@ -39,10 +41,10 @@ namespace LibationWinForms.AvaloniaUI.Views
 			}
 			catch (Exception ex)
 			{
-				System.Windows.Forms.MessageBox.Show($"Bad filter string:\r\n\r\n{ex.Message}", "Bad filter string", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);
+				await MessageBox.Show($"Bad filter string:\r\n\r\n{ex.Message}", "Bad filter string", MessageBoxButtons.OK, MessageBoxIcon.Error);
 
 				// re-apply last good filter
-				performFilter(lastGoodFilter);
+				await performFilter(lastGoodFilter);
 			}
 		}
 	}

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.Liberate.axaml.cs

@@ -1,4 +1,5 @@
 using DataLayer;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using System;
 using System.Linq;
 using System.Threading.Tasks;
@@ -40,15 +41,15 @@ namespace LibationWinForms.AvaloniaUI.Views
 
 		public async void convertAllM4bToMp3ToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs args)
 		{
-			var result = System.Windows.Forms.MessageBox.Show(
+			var result = await MessageBox.Show(
 				"This converts all m4b titles in your library to mp3 files. Original files are not deleted."
 				+ "\r\nFor large libraries this will take a long time and will take up more disk space."
 				+ "\r\n\r\nContinue?"
 				+ "\r\n\r\n(To always download titles as mp3 instead of m4b, go to Settings: Download my books as .MP3 files)",
 				"Convert all M4b => Mp3?",
-				System.Windows.Forms.MessageBoxButtons.YesNo,
-				System.Windows.Forms.MessageBoxIcon.Warning);
-			if (result == System.Windows.Forms.DialogResult.Yes)
+				MessageBoxButtons.YesNo,
+				MessageBoxIcon.Warning);
+			if (result == DialogResult.Yes)
 			{
 				SetQueueCollapseState(false);
 				await Task.Run(() => processBookQueue1.AddConvertMp3(ApplicationServices.DbContexts.GetLibrary_Flat_NoTracking()

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.ProcessQueue.axaml.cs

@@ -1,6 +1,7 @@
 using DataLayer;
 using Dinah.Core;
 using LibationFileManager;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using System;
 using System.Linq;
 
@@ -15,7 +16,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 			SetQueueCollapseState(collapseState);
 		}
 
-		public void ProductsDisplay_LiberateClicked(object sender, LibraryBook libraryBook)
+		public async void ProductsDisplay_LiberateClicked(object sender, LibraryBook libraryBook)
 		{
 			try
 			{
@@ -38,7 +39,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 					if (!Go.To.File(filePath?.ShortPathName))
 					{
 						var suffix = string.IsNullOrWhiteSpace(filePath) ? "" : $":\r\n{filePath}";
-						System.Windows.Forms.MessageBox.Show($"File not found" + suffix);
+						await MessageBox.Show($"File not found" + suffix);
 					}
 				}
 			}

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.ScanManual.axaml.cs

@@ -2,6 +2,7 @@
 using AudibleUtilities;
 using Avalonia.Controls;
 using LibationFileManager;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
 using LibationWinForms.Dialogs;
 using System;
 using System.Collections.Generic;
@@ -49,9 +50,9 @@ namespace LibationWinForms.AvaloniaUI.Views
 			}
 		}
 
-		public void noAccountsYetAddAccountToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+		public async void noAccountsYetAddAccountToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
-			System.Windows.Forms.MessageBox.Show("To load your Audible library, come back here to the Import menu after adding your account");
+			await MessageBox.Show("To load your Audible library, come back here to the Import menu after adding your account");
 			new AccountsDialog().ShowDialog();
 		}
 
@@ -91,7 +92,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 
 				// this is here instead of ScanEnd so that the following is only possible when it's user-initiated, not automatic loop
 				if (Configuration.Instance.ShowImportedStats && newAdded > 0)
-					System.Windows.Forms.MessageBox.Show($"Total processed: {totalProcessed}\r\nNew: {newAdded}");
+					await MessageBox.Show($"Total processed: {totalProcessed}\r\nNew: {newAdded}");
 			}
 			catch (Exception ex)
 			{

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.Settings.axaml.cs

@@ -1,4 +1,5 @@
-using LibationWinForms.Dialogs;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
+using LibationWinForms.Dialogs;
 using System;
 using System.Linq;
 
@@ -13,7 +14,7 @@ namespace LibationWinForms.AvaloniaUI.Views
 
 		public void basicSettingsToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e) => new SettingsDialog().ShowDialog();
 
-		public void aboutToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
-			=> System.Windows.Forms.MessageBox.Show($"Running Libation version {AppScaffolding.LibationScaffolding.BuildVersion}", $"Libation v{AppScaffolding.LibationScaffolding.BuildVersion}");
+		public async void aboutToolStripMenuItem_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+			=> await MessageBox.Show($"Running Libation version {AppScaffolding.LibationScaffolding.BuildVersion}", $"Libation v{AppScaffolding.LibationScaffolding.BuildVersion}");
 	}
 }

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.axaml

@@ -14,7 +14,7 @@
 
 	<Border BorderBrush="{DynamicResource DataGridGridLinesBrush}" BorderThickness="2" Padding="15">
 		<Grid RowDefinitions="Auto,Auto,*,Auto">
-			<Grid Grid.Row="0" ColumnDefinitions="1*, Auto">
+			<Grid Grid.Row="0" ColumnDefinitions="1*,Auto">
 
 				<!-- Menu Strip -->
 				<Menu Grid.Column="0" VerticalAlignment="Top">
@@ -106,7 +106,9 @@
 						<MenuItem Click="aboutToolStripMenuItem_Click" Header="A_bout..." />
 					</MenuItem>
 				</Menu>
+				<Button Grid.Column="1" Content="Show Message Box" Click="ShowMessageBoxButton_Click" />
 				<StackPanel Name="scanningToolStripMenuItem" Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right">
+					<Button Content="Show Message Box" Click="ShowMessageBoxButton_Click" />
 					<Image Width="16" Height="16" Source="/AvaloniaUI/Assets/import_16x16.png" />
 					<TextBlock Name="scanningToolStripMenuItem_Text" Margin="5,0,5,0" VerticalAlignment="Center" Text="Scanning..."/>
 				</StackPanel>

Source/LibationWinForms/AvaloniaUI/Views/MainWindow/MainWindow.axaml.cs

@@ -7,10 +7,18 @@ using System;
 using System.Linq;
 using Avalonia.Threading;
 using LibationWinForms.AvaloniaUI.Views.ProductsGrid;
+using Avalonia.ReactiveUI;
+using LibationWinForms.AvaloniaUI.ViewModels;
+using System.Threading.Tasks;
+using ReactiveUI;
+using LibationWinForms.AvaloniaUI.ViewModels.Dialogs;
+using LibationWinForms.AvaloniaUI.Views.Dialogs;
+using Avalonia.Media;
+using System.Collections.Generic;
 
 namespace LibationWinForms.AvaloniaUI.Views
 {
-	public partial class MainWindow : Window
+	public partial class MainWindow : ReactiveWindow<MainWindowViewModel>
 	{
 		public MainWindow()
 		{
@@ -46,6 +54,30 @@ namespace LibationWinForms.AvaloniaUI.Views
 
 		public void OnLoad() => Load?.Invoke(this, EventArgs.Empty);
 
+		public async void ShowMessageBoxButton_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
+		{
+			await Task.Run(() => DoShowDialogAsync());
+		}
+
+		private async Task DoShowDialogAsync()
+		{
+
+			string caption = "this is a dialog message";
+			string message =
+@"The Collatz conjecture is: This process will eventually reach the number 1, regardless of which positive integer is chosen initially.
+
+If the conjecture is false, it can only be because there is some starting number which gives rise to a sequence that does not contain 1. Such a sequence would either enter a repeating cycle that excludes 1, or increase without bound. No such sequence has been found.
+
+The smallest i such that ai < a0 is called the stopping time of n. Similarly, the smallest k such that ak = 1 is called the total stopping time of n.[3] If one of the indexes i or k doesn't exist, we say that the stopping time or the total stopping time, respectively, is infinite.
+
+The Collatz conjecture asserts that the total stopping time of every n is finite. It is also equivalent to saying that every n >= 2 has a finite stopping time.
+
+Since 3n + 1 is even whenever n is odd, one may instead use the shortcut form of the Collatz function:";
+
+
+			var result = await MessageBox.Show(message, caption);
+		}
+
 		private void FindAllControls()
 		{
 			{

Source/LibationWinForms/AvaloniaUI/Views/ProductsGrid/ProductsDisplay2.Buttons.xaml.cs

@@ -99,7 +99,7 @@ namespace LibationWinForms.AvaloniaUI.Views.ProductsGrid
 
 			if (button.DataContext is LibraryBookEntry2 lbEntry)
 			{
-				var bookDetailsForm = new Dialogs.BookDetailsDialog(lbEntry.LibraryBook);
+				var bookDetailsForm = new LibationWinForms.Dialogs.BookDetailsDialog(lbEntry.LibraryBook);
 				if (bookDetailsForm.ShowDialog() == System.Windows.Forms.DialogResult.OK)
 					lbEntry.Commit(bookDetailsForm.NewTags, bookDetailsForm.BookLiberatedStatus, bookDetailsForm.PdfLiberatedStatus);
 			}

Source/LibationWinForms/LibationWinForms.csproj

@@ -40,16 +40,24 @@
 <ItemGroup>
     <AvaloniaResource Include="AvaloniaUI\Assets\**" />
     <None Remove=".gitignore" />
+    <None Remove="AvaloniaUI\Assets\Asterisk.png" />
     <None Remove="AvaloniaUI\Assets\cancel.png" />
     <None Remove="AvaloniaUI\Assets\completed.png" />
     <None Remove="AvaloniaUI\Assets\down.png" />
     <None Remove="AvaloniaUI\Assets\edit_25x25.png" />
+    <None Remove="AvaloniaUI\Assets\error.png" />
     <None Remove="AvaloniaUI\Assets\errored.png" />
+    <None Remove="AvaloniaUI\Assets\Exclamation.png" />
     <None Remove="AvaloniaUI\Assets\first.png" />
     <None Remove="AvaloniaUI\Assets\glass-with-glow_16.png" />
     <None Remove="AvaloniaUI\Assets\import_16x16.png" />
     <None Remove="AvaloniaUI\Assets\last.png" />
     <None Remove="AvaloniaUI\Assets\LibationStyles.xaml" />
+    <None Remove="AvaloniaUI\Assets\MBIcons\Asterisk.png" />
+    <None Remove="AvaloniaUI\Assets\MBIcons\error.png" />
+    <None Remove="AvaloniaUI\Assets\MBIcons\Exclamation.png" />
+    <None Remove="AvaloniaUI\Assets\MBIcons\Question.png" />
+    <None Remove="AvaloniaUI\Assets\Question.png" />
     <None Remove="AvaloniaUI\Assets\queued.png" />
     <None Remove="AvaloniaUI\Assets\up.png" />
   </ItemGroup>