Add theme import and export function

Source/LibationAvalonia/Controls/GroupBox.axaml

@@ -8,7 +8,7 @@
 
 	<ContentControl.Styles>
 		<Style Selector="controls|GroupBox">
-			<Setter Property="BorderBrush" Value="{DynamicResource SystemBaseMediumLowColor}" /> 
+			<Setter Property="BorderBrush" Value="{DynamicResource SystemBaseMediumColor}" /> 
 			<Setter Property="BorderThickness" Value="1" />
 			<Setter Property="CornerRadius" Value="3" />
 			<Setter Property="Template">

Source/LibationAvalonia/Controls/ThemePreviewControl.axaml

@@ -19,13 +19,13 @@
 				<TextBox Margin="5,0" Text="This is an editable text box" />
 				<TextBox Margin="5,0" Text="This is a read-only text box" IsReadOnly="True" />
 				<NumericUpDown Margin="5,0" Value="100" />
-				<controls:LinkLabel VerticalAlignment="Center" Margin="5,0" Text="This is an unvisited link" />
+				<controls:LinkLabel VerticalAlignment="Center" Margin="5,5" Text="This is an unvisited link" />
-				<controls:LinkLabel VerticalAlignment="Center" Margin="5,0" Text="This is a visited link" Foreground="{DynamicResource HyperlinkVisited}" />
+				<controls:LinkLabel VerticalAlignment="Center" Margin="5,5" Text="This is a visited link" Foreground="{DynamicResource HyperlinkVisited}" />
-				<StackPanel Margin="5,0" Height="15" Orientation="Horizontal">
+				<StackPanel Margin="5,0" Height="25" Orientation="Horizontal">
 					<StackPanel.Styles>
 						<Style Selector="Path">
 							<Setter Property="Stretch" Value="Uniform" />
-							<Setter Property="Margin" Value="3,0" />
+							<Setter Property="Margin" Value="3,5" />
 							<Setter Property="Fill" Value="{DynamicResource IconFill}" />
 						</Style>
 					</StackPanel.Styles>

Source/LibationAvalonia/Dialogs/ThemePickerDialog.axaml

@@ -2,8 +2,8 @@
 		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 		xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
 		xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-		mc:Ignorable="d" d:DesignWidth="850" d:DesignHeight="850"
+		mc:Ignorable="d" d:DesignWidth="965" d:DesignHeight="850"
-		Width="450" Height="450"
+		Width="965" Height="850"
 		x:Class="LibationAvalonia.Dialogs.ThemePickerDialog"
 		xmlns:controls="clr-namespace:LibationAvalonia.Controls"
 		Title="Theme Editor">
@@ -11,14 +11,21 @@
 	<Grid ColumnDefinitions="Auto,*">
 		<controls:ThemePreviewControl Name="ThemePickerPreviewControl" Margin="5" Grid.Column="1" />
 		<Grid
-			RowDefinitions="*,Auto">
+			RowDefinitions="*,Auto,Auto">
+			<Grid.Styles>
+				<Style Selector="Button">
+					<Setter Property="Height" Value="30" />
+					<Setter Property="Padding" Value="20,0" />
+					<Setter Property="Margin" Value="5" />
+				</Style>
+			</Grid.Styles>
 			<DataGrid
+				Grid.Row="0"
 				GridLinesVisibility="All"
 				Margin="5"
 				IsReadOnly="False"
 				ItemsSource="{Binding ThemeColors}">
 				<DataGrid.Columns>
-
 					<DataGridTemplateColumn Width="Auto" Header="Color">
 						<DataGridTemplateColumn.CellTemplate>
 							<DataTemplate>
@@ -28,47 +35,43 @@
 							</DataTemplate>
 						</DataGridTemplateColumn.CellTemplate>
 					</DataGridTemplateColumn>				
-				
 					<DataGridTextColumn
 						Width="Auto"
 						Binding="{Binding ThemeItemName, Mode=TwoWay}"
 						Header="Theme Item"/>
-
 				</DataGrid.Columns>
-
 			</DataGrid>
 			<Grid
 				Grid.Row="1"
+				ColumnDefinitions="Auto,*,Auto">
+				<Button
+					Grid.Column="0"
+					Content="Import Theme"
+					Command="{Binding ImportTheme}" />
+				<Button
+					Grid.Column="2"
+					Content="Export Theme"
+					Command="{Binding ExportTheme}" />
+			</Grid>
+			<Grid
+				Grid.Row="2"
 				ColumnDefinitions="Auto,Auto,Auto,*,Auto">			
-			
-				<Grid.Styles>
-					<Style Selector="Button">
-						<Setter Property="Height" Value="30" />
-						<Setter Property="Padding" Value="20,0" />
-						<Setter Property="Margin" Value="5" />
-					</Style>
-				</Grid.Styles>
-			
 				<Button
 					Grid.Column="0"
 					Content="Cancel"
 					Command="{Binding CancelAndClose}" />			
-			
 				<Button
 					Grid.Column="1"
 					Content="Reset"
 					Command="{Binding ResetColors}" />			
-			
 				<Button
 					Grid.Column="2"
 					Content="Defaults"
 					Command="{Binding LoadDefaultColors}" />			
-			
 				<Button
 					Grid.Column="4"
 					Content="Save"
 					Command="{Binding SaveAndCloseAsync}" />
-
 			</Grid>
 		</Grid>
 	</Grid>

Source/LibationAvalonia/Dialogs/ThemePickerDialog.axaml.cs

@@ -7,6 +7,7 @@ using LibationAvalonia.Themes;
 using System.Threading.Tasks;
 using System.Collections.Generic;
 using System.Linq;
+using Avalonia.Platform.Storage;
 
 #nullable enable
 namespace LibationAvalonia.Dialogs;
@@ -15,13 +16,14 @@ public partial class ThemePickerDialog : DialogWindow
 {
 	protected DataGridCollectionView ThemeColors { get; }
 	private ChardonnayTheme ExistingTheme { get; } = ChardonnayTheme.GetLiveTheme();
+	private ChardonnayTheme WorkingTheme { get; }
 
 	public ThemePickerDialog()
 	{
 		InitializeComponent();
 		CancelOnEscape = false;
-		var workingTheme = (ChardonnayTheme)ExistingTheme.Clone();
+		WorkingTheme = (ChardonnayTheme)ExistingTheme.Clone();
-		ThemeColors = new(EnumerateThemeItemColors(workingTheme, ActualThemeVariant));
+		ThemeColors = new(EnumerateThemeItemColors());
 
 		DataContext = this;
 		Closing += ThemePickerDialog_Closing;
@@ -36,6 +38,78 @@ public partial class ThemePickerDialog : DialogWindow
 		}
 	}
 
+	protected async Task ImportTheme()
+	{
+		try
+		{
+			var openFileDialogOptions = new FilePickerOpenOptions
+			{
+				Title = $"Select the ChardonnayTheme.json file",
+				AllowMultiple = false,
+				FileTypeFilter =
+				[
+					new("JSON files (*.json)")
+					{
+						Patterns = ["*.json"],
+						AppleUniformTypeIdentifiers  = ["public.json"]
+					}
+				]
+			};
+
+			var selectedFiles = await StorageProvider.OpenFilePickerAsync(openFileDialogOptions);
+			var selectedFile = selectedFiles.SingleOrDefault()?.TryGetLocalPath();
+
+			if (selectedFile is null) return;
+
+			using (var theme = new ChardonnayThemePersister(selectedFile))
+			{
+				theme.Target.ApplyTheme(ActualThemeVariant);
+			}
+
+			await MessageBox.Show(this, "Theme imported and applied", "Theme Imported");
+		}
+		catch (Exception ex)
+		{
+			await MessageBox.ShowAdminAlert(this, "Error attempting to import your chardonnay theme.", "Error Importing", ex);
+		}
+	}
+
+	protected async Task ExportTheme()
+	{
+		try
+		{
+			var options = new FilePickerSaveOptions
+			{
+				Title = "Where to export Library",
+				SuggestedFileName = $"ChardonnayTheme",
+				DefaultExtension = "json",
+				ShowOverwritePrompt = true,
+				FileTypeChoices =
+				[
+					new("JSON files (*.json)")
+					{
+						Patterns = ["*.json"],
+						AppleUniformTypeIdentifiers = ["public.json"]
+					},
+					new("All files (*.*)") { Patterns = ["*"] }
+				]
+			};
+
+			var selectedFile = (await StorageProvider.SaveFilePickerAsync(options))?.TryGetLocalPath();
+
+			if (selectedFile is null) return;
+
+			using (var theme = new ChardonnayThemePersister(WorkingTheme, selectedFile))
+				theme.Target.Save();
+
+			await MessageBox.Show(this, "Theme exported to:\r\n" + selectedFile, "Theme Exported");
+		}
+		catch (Exception ex)
+		{
+			await MessageBox.ShowAdminAlert(this, "Error attempting to export your chardonnay theme.", "Error Exporting", ex);
+		}
+	}
+
 	protected override void CancelAndClose()
 	{
 		ExistingTheme.ApplyTheme(ActualThemeVariant);
@@ -83,17 +157,17 @@ public partial class ThemePickerDialog : DialogWindow
 		}
 	}
 
-	private static IEnumerable<ThemeItemColor> EnumerateThemeItemColors(ChardonnayTheme workingTheme, ThemeVariant themeVariant)
+	private IEnumerable<ThemeItemColor> EnumerateThemeItemColors()
-		=> workingTheme
+		=> WorkingTheme
-		.GetThemeColors(themeVariant)
+		.GetThemeColors(ActualThemeVariant)
 		.Select(kvp => new ThemeItemColor
 		{
 			ThemeItemName = kvp.Key,
 			ThemeColor = kvp.Value,
 			ColorSetter = c =>
 			{
-				workingTheme.SetColor(themeVariant, kvp.Key, c);
+				WorkingTheme.SetColor(ActualThemeVariant, kvp.Key, c);
-				workingTheme.ApplyTheme(themeVariant);
+				WorkingTheme.ApplyTheme(ActualThemeVariant);
 			}
 		});
 

Source/LibationAvalonia/Themes/ChardonnayThemePersister.cs

@@ -12,9 +12,9 @@ public class ChardonnayThemePersister : JsonFilePersister<ChardonnayTheme>
 {
 	public static string jsonPath = System.IO.Path.Combine(Configuration.Instance.LibationFiles, "ChardonnayTheme.json");
 
-	private ChardonnayThemePersister(string path)
+	public ChardonnayThemePersister(string path)
 		: base(path, null) { }
-	private ChardonnayThemePersister(ChardonnayTheme target, string path)
+	public ChardonnayThemePersister(ChardonnayTheme target, string path)
 		: base(target, path, null) { }
 
 	protected override JsonSerializerSettings GetSerializerSettings()