diff --git a/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml b/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml
index dd3fddf2..066552bb 100644
--- a/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml
+++ b/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml
@@ -7,6 +7,7 @@
 		xmlns:asControls="using:CarinaStudio.AppSuite.Controls"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="CarinaStudio.ULogViewer.Controls.KeyLogAnalysisRuleSetEditorDialog"
+        Name="dialog"
         CanResize="True"
         Classes="Dialog"
         Height="{StaticResource Double/KeyLogAnalysisRuleSetEditorDialog.Height}"
@@ -23,10 +24,10 @@
 		<!-- Control buttons -->
 		<Border Classes="Dialog_ControlButtonsPanel">
 			<StackPanel Classes="Dialog_ControlButtonsPanel">
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
 				<Separator Classes="Dialog_Separator_Small"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].CompleteEditing}" Content="{DynamicResource String/Common.OK}" IsEnabled="{Binding $parent[Window].AreValidParameters}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].Close}" Content="{DynamicResource String/Common.Cancel}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.CompleteEditing}" Content="{Binding #dialog.OKButtonText}" IsEnabled="{Binding #dialog.AreValidParameters}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
 
@@ -70,7 +71,7 @@
 							<TextBlock Classes="Dialog_TextBlock" HorizontalAlignment="Right" IsVisible="{Binding !#ruleListBox.IsVisible}" Text="{DynamicResource String/Common.None}"/>
 						</asControls:DialogItem>
 						<Line Classes="Dialog_Item_Separator_Inner"/>
-						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding $parent[Window].Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding $parent[Window].Rules}">
+						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding #dialog.Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding #dialog.Rules}">
 							<asControls:ListBox.ItemTemplate>
 								<DataTemplate>
 									<Grid Name="itemRoot" ColumnDefinitions="Auto,*,Auto" RowDefinitions="Auto,Auto">
@@ -78,25 +79,25 @@
 											<Image Classes="Icon" IsVisible="{Binding $parent[ListBoxItem].IsSelected}" Source="{Binding ResultType, Converter={x:Static appConverters:DisplayableLogAnalysisResultIconConverter.Default}, ConverterParameter=Light}"/>
 											<Image Classes="Icon" IsVisible="{Binding !$parent[ListBoxItem].IsSelected}" Source="{Binding ResultType, Converter={x:Static appConverters:DisplayableLogAnalysisResultIconConverter.Default}}"/>
 										</Panel>
-										<asControls:SyntaxHighlightingTextBlock DefinitionSet="{Binding $parent[Window].RegexSyntaxHighlightingDefinitionSet}" FontFamily="{Binding PatternFontFamily, Source={x:Static appControls:ControlFonts.Default}}" Grid.Column="1" Text="{Binding Pattern}" TextTrimming="None"/>
-										<asControls:SyntaxHighlightingTextBlock DefinitionSet="{Binding $parent[Window].MessageSyntaxHighlightingDefinitionSet}" FontFamily="{Binding PatternFontFamily, Source={x:Static appControls:ControlFonts.Default}}" FontSize="{StaticResource Double/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Item.Message.FontSize}" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1" Margin="{StaticResource Thickness/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Message.Margin}" Opacity="{StaticResource Double/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Item.Message.Opacity}" Text="{Binding Message}" TextTrimming="None"/>
+										<asControls:SyntaxHighlightingTextBlock DefinitionSet="{Binding #dialog.RegexSyntaxHighlightingDefinitionSet}" FontFamily="{Binding PatternFontFamily, Source={x:Static appControls:ControlFonts.Default}}" Grid.Column="1" Text="{Binding Pattern}" TextTrimming="None"/>
+										<asControls:SyntaxHighlightingTextBlock DefinitionSet="{Binding #dialog.MessageSyntaxHighlightingDefinitionSet}" FontFamily="{Binding PatternFontFamily, Source={x:Static appControls:ControlFonts.Default}}" FontSize="{StaticResource Double/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Item.Message.FontSize}" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1" Margin="{StaticResource Thickness/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Message.Margin}" Opacity="{StaticResource Double/KeyLogAnalysisRuleSetEditorDialog.RuleListBox.Item.Message.Opacity}" Text="{Binding Message}" TextTrimming="None"/>
 										<Border Classes="InPlaceAction_Reserved"/>
 										<StackPanel Grid.Column="2" IsVisible="{Binding $parent[ListBoxItem].IsPointerOver}" Orientation="Horizontal">
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Delete.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Copy.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem]}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Edit.Outline}"/>
@@ -109,7 +110,7 @@
 							</asControls:ListBox.ItemTemplate>
 						</asControls:ListBox>
 						<Separator Classes="Dialog_Separator_Small" IsVisible="{Binding #ruleListBox.IsVisible}"/>
-						<Button Classes="Dialog_Item_Button" Command="{Binding $parent[Window].AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
+						<Button Classes="Dialog_Item_Button" Command="{Binding #dialog.AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
 
 					</StackPanel>
 				</Border>
diff --git a/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml.cs b/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml.cs
index 0cf98711..213e8e2a 100644
--- a/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/KeyLogAnalysisRuleSetEditorDialog.axaml.cs
@@ -20,7 +20,7 @@ namespace CarinaStudio.ULogViewer.Controls;
 /// <summary>
 /// Dialog to edit <see cref="KeyLogAnalysisRuleSet"/>.
 /// </summary>
-class KeyLogAnalysisRuleSetEditorDialog : Window<IULogViewerApplication>
+class KeyLogAnalysisRuleSetEditorDialog : Dialog<IULogViewerApplication>
 {
 	// Static fields.
 	static readonly StyledProperty<bool> AreValidParametersProperty = AvaloniaProperty.Register<KeyLogAnalysisRuleSetEditorDialog, bool>("AreValidParameters");
@@ -277,11 +277,6 @@ protected override void OnOpening(EventArgs e)
 		}
 		this.validateParametersAction.Execute();
 	}
-
-
-	/// <inheritdoc/>
-	protected override WindowTransparencyLevel OnSelectTransparentLevelHint() =>
-		WindowTransparencyLevel.None;
 	
 
 	/// <summary>
diff --git a/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml b/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml
index 4f3c3393..002cdc13 100644
--- a/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml
+++ b/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml
@@ -25,11 +25,11 @@
 		<!-- Control buttons -->
 		<Border Classes="Dialog_ControlButtonsPanel">
 			<StackPanel Classes="Dialog_ControlButtonsPanel">
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
 				<Separator Classes="Dialog_Separator_Small"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].ApplyCommand}" Content="{DynamicResource String/Common.Apply}" IsVisible="{Binding !#window.IsNewScriptSet}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].CompleteEditingCommand}" Content="{DynamicResource String/Common.OK}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].Close}" Content="{DynamicResource String/Common.Cancel}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.ApplyCommand}" Content="{DynamicResource String/Common.Apply}" IsVisible="{Binding !#window.IsNewScriptSet}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.CompleteEditingCommand}" Content="{Binding #window.OKButtonText}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
 
@@ -42,7 +42,7 @@
 					<StackPanel>
 				
 						<!-- Name and Icon -->
-						<StackPanel IsVisible="{Binding !$parent[Window].IsEmbeddedScriptSet}">
+						<StackPanel IsVisible="{Binding !#window.IsEmbeddedScriptSet}">
 							
 							<!-- Name -->
 							<asControls:DialogItem>
@@ -88,7 +88,7 @@
 						<asControls:DialogItem>
 							<WrapPanel VerticalAlignment="Center">
 								<TextBlock Classes="Dialog_TextBlock_Label" Text="{DynamicResource String/LogAnalysisScriptSetEditorDialog.SetupScript}"/>
-								<Button Classes="Dialog_Info_Button" Command="{x:Static app:Utility.OpenLinkCommand}" CommandParameter="{Binding $parent[Window].SetupScriptDocumentUri}" ToolTip.Tip="{DynamicResource String/Common.Help}">
+								<Button Classes="Dialog_Info_Button" Command="{x:Static app:Utility.OpenLinkCommand}" CommandParameter="{Binding #window.SetupScriptDocumentUri}" ToolTip.Tip="{DynamicResource String/Common.Help}">
 									<Image Classes="Icon" Source="{DynamicResource Image/Icon.Question.Outline}"/>
 								</Button>
 							</WrapPanel>
@@ -102,7 +102,7 @@
 						<asControls:DialogItem>
 							<WrapPanel VerticalAlignment="Center">
 								<TextBlock Classes="Dialog_TextBlock_Label" Text="{DynamicResource String/LogAnalysisScriptSetEditorDialog.AnalysisScript}"/>
-								<Button Classes="Dialog_Info_Button" Command="{x:Static app:Utility.OpenLinkCommand}" CommandParameter="{Binding $parent[Window].AnalysisScriptDocumentUri}" ToolTip.Tip="{DynamicResource String/Common.Help}">
+								<Button Classes="Dialog_Info_Button" Command="{x:Static app:Utility.OpenLinkCommand}" CommandParameter="{Binding #window.AnalysisScriptDocumentUri}" ToolTip.Tip="{DynamicResource String/Common.Help}">
 									<Image Classes="Icon" Source="{DynamicResource Image/Icon.Question.Outline}"/>
 								</Button>
 							</WrapPanel>
diff --git a/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml.cs b/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml.cs
index a5049dac..7ee2a588 100644
--- a/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/LogAnalysisScriptSetEditorDialog.axaml.cs
@@ -20,7 +20,7 @@ namespace CarinaStudio.ULogViewer.Controls;
 /// <summary>
 /// Dialog to edit log analysis script set.
 /// </summary>
-class LogAnalysisScriptSetEditorDialog : CarinaStudio.Controls.ApplicationWindow<IULogViewerApplication>
+class LogAnalysisScriptSetEditorDialog : Dialog<IULogViewerApplication>
 {
 	// Static fields.
 	static readonly DirectProperty<LogAnalysisScriptSetEditorDialog, Uri?> AnalysisScriptDocumentUriProperty = AvaloniaProperty.RegisterDirect<LogAnalysisScriptSetEditorDialog, Uri?>(nameof(AnalysisScriptDocumentUri), d => d.analysisScriptDocumentUri);
diff --git a/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml b/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml
index 8c288e58..037a7143 100644
--- a/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml
+++ b/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml
@@ -7,6 +7,7 @@
         xmlns:asControls="using:CarinaStudio.AppSuite.Controls"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="CarinaStudio.ULogViewer.Controls.OperationCountingAnalysisRuleSetEditorDialog"
+        Name="dialog"
         CanResize="True"
         Classes="Dialog"
         Height="{StaticResource Double/OperationCountingAnalysisRuleSetEditorDialog.Height}"
@@ -23,10 +24,10 @@
 		<!-- Control buttons -->
 		<Border Classes="Dialog_ControlButtonsPanel">
 			<StackPanel Classes="Dialog_ControlButtonsPanel">
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
 				<Separator Classes="Dialog_Separator_Small"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].CompleteEditing}" Content="{DynamicResource String/Common.OK}" IsEnabled="{Binding $parent[Window].AreValidParameters}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].Close}" Content="{DynamicResource String/Common.Cancel}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.CompleteEditing}" Content="{Binding #dialog.OKButtonText}" IsEnabled="{Binding #dialog.AreValidParameters}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
 
@@ -70,7 +71,7 @@
 							<TextBlock Classes="Dialog_TextBlock" HorizontalAlignment="Right" IsVisible="{Binding !#ruleListBox.IsVisible}" Text="{DynamicResource String/Common.None}"/>
 						</asControls:DialogItem>
 						<Line Classes="Dialog_Item_Separator_Inner"/>
-						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding $parent[Window].Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding $parent[Window].Rules}">
+						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding #dialog.Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding #dialog.Rules}">
 							<asControls:ListBox.ItemTemplate>
 								<DataTemplate>
 									<Grid Name="itemRoot" ColumnDefinitions="Auto,*,Auto" RowDefinitions="Auto,*">
@@ -90,21 +91,21 @@
 											TextTrimming="None"/>
 										<Border Classes="InPlaceAction_Reserved" Grid.Column="1"/>
 										<StackPanel Grid.Column="2" IsVisible="{Binding $parent[ListBoxItem].IsPointerOver}" Orientation="Horizontal">
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Delete.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Copy.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Edit.Outline}"/>
@@ -117,7 +118,7 @@
 							</asControls:ListBox.ItemTemplate>
 						</asControls:ListBox>
 						<Separator Classes="Dialog_Separator_Small" IsVisible="{Binding #ruleListBox.IsVisible}"/>
-						<Button Classes="Dialog_Item_Button" Command="{Binding $parent[Window].AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
+						<Button Classes="Dialog_Item_Button" Command="{Binding #dialog.AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
 
 					</StackPanel>
 				</Border>
diff --git a/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml.cs b/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml.cs
index 9468d1e7..1e95d8a2 100644
--- a/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/OperationCountingAnalysisRuleSetEditorDialog.axaml.cs
@@ -19,7 +19,7 @@ namespace CarinaStudio.ULogViewer.Controls
 	/// <summary>
 	/// Dialog to edit <see cref="OperationCountingAnalysisRuleSet"/>.
 	/// </summary>
-	class OperationCountingAnalysisRuleSetEditorDialog : Window<IULogViewerApplication>
+	class OperationCountingAnalysisRuleSetEditorDialog : Dialog<IULogViewerApplication>
 	{
 		/// <summary>
 		/// Definition set of patterns of rule.
@@ -252,11 +252,6 @@ protected override void OnOpening(EventArgs e)
 			}
 			this.validateParametersAction.Schedule();
 		}
-
-
-		/// <inheritdoc/>
-		protected override WindowTransparencyLevel OnSelectTransparentLevelHint() =>
-			WindowTransparencyLevel.None;
 		
 
 		/// <summary>
@@ -285,7 +280,7 @@ void RemoveRule(OperationCountingAnalysisRuleSet.Rule rule)
 		/// <summary>
 		/// Rules.
 		/// </summary>
-		public IList<OperationCountingAnalysisRuleSet.Rule> Rules { get => this.rules; }
+		public IList<OperationCountingAnalysisRuleSet.Rule> Rules => this.rules;
 
 
 		/// <summary>
@@ -298,7 +293,7 @@ public static void Show(Avalonia.Controls.Window parent, OperationCountingAnalys
 			// show existing dialog
 			if (ruleSet != null && DialogWithEditingRuleSets.TryGetValue(ruleSet, out var dialog))
 			{
-				dialog?.ActivateAndBringToFront();
+				dialog.ActivateAndBringToFront();
 				return;
 			}
 
diff --git a/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml b/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml
index b81367c3..5a1ab74e 100644
--- a/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml
+++ b/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml
@@ -7,6 +7,7 @@
         xmlns:asControls="using:CarinaStudio.AppSuite.Controls"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="CarinaStudio.ULogViewer.Controls.OperationDurationAnalysisRuleSetEditorDialog"
+        Name="dialog"
         CanResize="True"
         Classes="Dialog"
         Height="{StaticResource Double/OperationDurationAnalysisRuleSetEditorDialog.Height}"
@@ -23,10 +24,10 @@
 		<!-- Control buttons -->
 		<Border Classes="Dialog_ControlButtonsPanel">
 			<StackPanel Classes="Dialog_ControlButtonsPanel">
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
 				<Separator Classes="Dialog_Separator_Small"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].CompleteEditing}" Content="{DynamicResource String/Common.OK}" IsEnabled="{Binding $parent[Window].AreValidParameters}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].Close}" Content="{DynamicResource String/Common.Cancel}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.CompleteEditing}" Content="{Binding #dialog.OKButtonText}" IsEnabled="{Binding #dialog.AreValidParameters}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #dialog.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
 
@@ -69,7 +70,7 @@
 							<TextBlock Classes="Dialog_TextBlock" HorizontalAlignment="Right" IsVisible="{Binding !#ruleListBox.IsVisible}" Text="{DynamicResource String/Common.None}"/>
 						</asControls:DialogItem>
 						<Line Classes="Dialog_Item_Separator_Inner"/>
-						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding $parent[Window].Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding $parent[Window].Rules}">
+						<asControls:ListBox Name="ruleListBox" Classes="Dialog_Item_ListBox" IsVisible="{Binding #dialog.Rules.Count}" ItemsPanel="{StaticResource ItemsPanelTemplate/StackPanel}" ItemsSource="{Binding #dialog.Rules}">
 							<asControls:ListBox.ItemTemplate>
 								<DataTemplate>
 									<Grid Name="itemRoot" ColumnDefinitions="Auto,*,Auto" RowDefinitions="Auto,Auto,*">
@@ -98,35 +99,35 @@
 											TextTrimming="None"/>
 										<Border Classes="InPlaceAction_Reserved" Grid.Column="1"/>
 										<StackPanel Grid.Column="2" IsVisible="{Binding $parent[ListBoxItem].IsPointerOver}" Orientation="Horizontal">
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.RemoveRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Delete}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Delete.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.CopyRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Copy}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Copy.Outline}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].AddRuleBeforeCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/OperationDurationAnalysisRuleSetEditorDialog.AddRuleBefore}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.AddRuleBeforeCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/OperationDurationAnalysisRuleSetEditorDialog.AddRuleBefore}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/EndTo}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].AddRuleAfterCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/OperationDurationAnalysisRuleSetEditorDialog.AddRuleAfter}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.AddRuleAfterCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/OperationDurationAnalysisRuleSetEditorDialog.AddRuleAfter}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/BeginFrom}"/>
 													</DrawingImage>
 												</asControls:Image>
 											</Button>
-											<Button Classes="InPlaceAction_Button" Command="{Binding $parent[Window].EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
+											<Button Classes="InPlaceAction_Button" Command="{Binding #dialog.EditRuleCommand}" CommandParameter="{Binding $parent[ListBoxItem].DataContext}" ToolTip.Tip="{DynamicResource String/Common.Edit}">
 												<asControls:Image Classes="InPlaceAction_Icon">
 													<DrawingImage>
 														<GeometryDrawing Brush="{Binding #itemRoot.(TextElement.Foreground)}" Geometry="{StaticResource Geometry/Icon.Edit.Outline}"/>
@@ -139,7 +140,7 @@
 							</asControls:ListBox.ItemTemplate>
 						</asControls:ListBox>
 						<Separator Classes="Dialog_Separator_Small" IsVisible="{Binding #ruleListBox.IsVisible}"/>
-						<Button Classes="Dialog_Item_Button" Command="{Binding $parent[Window].AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
+						<Button Classes="Dialog_Item_Button" Command="{Binding #dialog.AddRule}" Content="{DynamicResource String/Common.Add.WithDialog}"/>
 					</StackPanel>
 				</Border>
 
diff --git a/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml.cs b/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml.cs
index e0ee20fd..acde3ff1 100644
--- a/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/OperationDurationAnalysisRuleSetEditorDialog.axaml.cs
@@ -19,7 +19,7 @@ namespace CarinaStudio.ULogViewer.Controls;
 /// <summary>
 /// Dialog to edit <see cref="OperationDurationAnalysisRuleSet"/>.
 /// </summary>
-class OperationDurationAnalysisRuleSetEditorDialog : Window<IULogViewerApplication>
+class OperationDurationAnalysisRuleSetEditorDialog : Dialog<IULogViewerApplication>
 {
 	/// <summary>
 	/// Definition set of patterns of rule.
@@ -317,11 +317,6 @@ protected override void OnOpening(EventArgs e)
 		}
 		this.validateParametersAction.Schedule();
 	}
-
-
-	/// <inheritdoc/>
-	protected override WindowTransparencyLevel OnSelectTransparentLevelHint() =>
-		WindowTransparencyLevel.None;
 	
 
 	/// <summary>
diff --git a/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml b/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml
index e6dd0b34..23a7fcbd 100644
--- a/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml
+++ b/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml
@@ -38,7 +38,7 @@
 						<TextBox Name="groupNameTextBox" Classes="Dialog_Item_TextBox" MaxLength="64" Watermark="{DynamicResource String/Common.None}"/>
 					</asControls:DialogItem>
 					<Separator Classes="Dialog_Separator_Small"/>
-					<ToggleButton Name="selectGroupNameButton" Classes="Dialog_Item_ToggleButton" Command="{Binding $parent[Window].ShowGroupNameSelectionMenu}" IsEnabled="{Binding Groups.Count, Source={x:Static appViewModels:PredefinedLogTextFilterManager.Default}}">
+					<ToggleButton Name="selectGroupNameButton" Classes="Dialog_Item_ToggleButton" Command="{Binding #window.ShowGroupNameSelectionMenu}" IsEnabled="{Binding Groups.Count, Source={x:Static appViewModels:PredefinedLogTextFilterManager.Default}}">
 						<Grid ColumnDefinitions="*,Auto">
 							<TextBlock Classes="Button_Text" Text="{DynamicResource String/PredefinedLogTextFilterEditorDialog.SelectGroupName}"/>
 							<Image Classes="Button_DropDownIcon" Grid.Column="1" IsVisible="{Binding !$parent[ToggleButton].IsChecked}" Source="{DynamicResource Image/Icon.DropDown.Down}"/>
@@ -85,8 +85,8 @@
 		<!-- Control buttons -->
 		<Border Classes="Dialog_ControlButtonsPanel" Grid.Row="1">
 			<StackPanel Classes="Dialog_ControlButtonsPanel">
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].CompleteEditing}" Content="{DynamicResource String/Common.OK}" IsEnabled="{Binding $parent[Window].AreValidParameters}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding $parent[Window].Close}" Content="{DynamicResource String/Common.Cancel}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.CompleteEditing}" Content="{Binding #window.OKButtonText}" IsEnabled="{Binding #window.AreValidParameters}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
 		
diff --git a/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml.cs b/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml.cs
index 8bed7eaa..97e4f00b 100644
--- a/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/PredefinedLogTextFilterEditorDialog.axaml.cs
@@ -20,7 +20,7 @@ namespace CarinaStudio.ULogViewer.Controls;
 /// <summary>
 /// Dialog to edit or create <see cref="PredefinedLogTextFilter"/>.
 /// </summary>
-class PredefinedLogTextFilterEditorDialog : Window<IULogViewerApplication>
+class PredefinedLogTextFilterEditorDialog : AppSuite.Controls.Dialog<IULogViewerApplication>
 {
 	/// <summary>
 	/// Key of persistent state tp indicate whether tutorial of group name has been shown or not.
@@ -272,11 +272,6 @@ protected override void OnOpening(EventArgs e)
 	}
 
 
-	/// <inheritdoc/>
-	protected override WindowTransparencyLevel OnSelectTransparentLevelHint() =>
-		WindowTransparencyLevel.None;
-
-
 	// Select group name.
 	void SelectGroupName(PredefinedLogTextFilterGroup group)
 	{
diff --git a/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml b/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml
index 750e13d3..84621226 100644
--- a/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml
+++ b/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml
@@ -31,7 +31,7 @@
 				<Button Classes="Dialog_ControlButton" Command="{Binding #window.OpenDocumentation}" Content="{DynamicResource String/Common.Help}"/>
 				<Separator Classes="Dialog_Separator_Small"/>
 				<Button Classes="Dialog_ControlButton" Command="{Binding #window.ApplyCommand}" Content="{DynamicResource String/Common.Apply}" IsVisible="{Binding !#window.IsNewProvider}"/>
-				<Button Classes="Dialog_ControlButton" Command="{Binding #window.CompleteEditingCommand}" Content="{DynamicResource String/Common.OK}"/>
+				<Button Classes="Dialog_ControlButton" Command="{Binding #window.CompleteEditingCommand}" Content="{Binding #window.OKButtonText}"/>
 				<Button Classes="Dialog_ControlButton" Command="{Binding #window.Close}" Content="{DynamicResource String/Common.Cancel}"/>
 			</StackPanel>
 		</Border>
diff --git a/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml.cs b/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml.cs
index 71b812f0..db5ec586 100644
--- a/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml.cs
+++ b/ULogViewer/Controls/ScriptLogDataSourceProviderEditorDialog.axaml.cs
@@ -21,7 +21,7 @@ namespace CarinaStudio.ULogViewer.Controls;
 /// <summary>
 /// Dialog to edit <see cref="ScriptLogDataSourceProvider"/>s.
 /// </summary>
-class ScriptLogDataSourceProviderEditorDialog : CarinaStudio.Controls.Dialog<IULogViewerApplication>
+class ScriptLogDataSourceProviderEditorDialog : Dialog<IULogViewerApplication>
 {
 	// Supported source option.
 	public class SupportedSourceOption