enhance: add Orientation prop for ScrollViewerAttach

src/Net_40/HandyControl_Net_40/Themes/Theme.xaml

@@ -10874,7 +10874,7 @@
 					</Border.CacheMode>
 					<RepeatButton Focusable="False" Style="{StaticResource RepeatButtonIcon}" Padding="8" hc:IconElement.Geometry="{StaticResource LeftGeometry}" Foreground="{DynamicResource PrimaryTextBrush}" Background="{DynamicResource SecondaryRegionBrush}" x:Name="PART_ScrollButtonLeft" />
 				</Border>
-				<hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
+				<hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" hc:ScrollViewerAttach.Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
 					<Border Background="{TemplateBinding Background}" BorderThickness="0,0,0,1" BorderBrush="{DynamicResource BorderBrush}" Name="PART_HeaderBorder">
 						<hc:TabPanel MinHeight="{TemplateBinding TabItemHeight}" TabItemHeight="{TemplateBinding TabItemHeight}" TabItemWidth="{TemplateBinding TabItemWidth}" IsTabFillEnabled="{TemplateBinding IsTabFillEnabled}" Margin="0,0,-1,-1" x:Name="PART_HeaderPanel" HorizontalAlignment="Left" Background="{DynamicResource SecondaryTextBrush}" IsItemsHost="true" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1">
 							<interactivity:Interaction.Behaviors>

src/Shared/HandyControlDemo_Shared/UserControl/Controls/ScrollViewerDemoCtl.xaml

@@ -14,7 +14,7 @@
                 <RowDefinition/>
             </Grid.RowDefinitions>
             <Border BorderThickness="1" BorderBrush="{DynamicResource BorderBrush}">
-                <hc:ScrollViewer Orientation="Horizontal" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" IsInertiaEnabled="True">
+                <hc:ScrollViewer hc:ScrollViewerAttach.Orientation="Horizontal" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" IsInertiaEnabled="True">
                     <StackPanel Orientation="Horizontal">
                         <Border Style="{StaticResource BorderRegion}" Width="200" Height="200" Margin="10,10,32,10">
                             <Border Background="{DynamicResource PrimaryBrush}">

src/Shared/HandyControlDemo_Shared/UserControl/Controls/WaterfallPanelDemoCtl.xaml

@@ -32,7 +32,7 @@
                         </Border>
                     </hc:WaterfallPanel>
                 </hc:ScrollViewer>
-                <hc:ScrollViewer Margin="32,0,0,0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" Orientation="Horizontal" MaxWidth="300">
+                <hc:ScrollViewer Margin="32,0,0,0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden" hc:ScrollViewerAttach.Orientation="Horizontal" MaxWidth="300">
                     <hc:WaterfallPanel VerticalAlignment="Center" Height="300" Orientation="Vertical" Groups="{Binding Value,ElementName=UpDownGroups}" hc:PanelElement.FluidMoveBehavior="{StaticResource BehaviorXY200}">
                         <Border Width="100" Background="{DynamicResource PrimaryBrush}" Effect="{StaticResource EffectShadow1}" Margin="5">
                             <TextBlock Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" VerticalAlignment="Center" HorizontalAlignment="Center" Foreground="White"/>

src/Shared/HandyControlDemo_Shared/UserControl/Styles/NativeScrollViewerDemoCtl.xaml

@@ -14,7 +14,7 @@
                 <RowDefinition/>
             </Grid.RowDefinitions>
             <Border BorderThickness="1" BorderBrush="{DynamicResource BorderBrush}">
-                <ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden">
+                <ScrollViewer hc:ScrollViewerAttach.Orientation="Horizontal" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Hidden">
                     <StackPanel Orientation="Horizontal">
                         <Border Style="{StaticResource BorderRegion}" Width="200" Height="200" Margin="10,10,32,10">
                             <Border Background="{DynamicResource PrimaryBrush}">

src/Shared/HandyControl_Shared/Controls/Attach/ScrollViewerAttach.cs

@@ -1,4 +1,6 @@
-using System.Windows;
+using System;
+using System.Windows;
+using System.Windows.Controls;
 using HandyControl.Data;
 
 namespace HandyControl.Controls
@@ -13,5 +15,42 @@ namespace HandyControl.Controls
 
         public static bool GetAutoHide(DependencyObject element)
             => (bool) element.GetValue(AutoHideProperty);
+
+        public static readonly DependencyProperty OrientationProperty = DependencyProperty.RegisterAttached(
+            "Orientation", typeof(Orientation), typeof(ScrollViewerAttach), new FrameworkPropertyMetadata(ValueBoxes.VerticalBox, FrameworkPropertyMetadataOptions.Inherits, OnOrientationChanged));
+
+        private static void OnOrientationChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is ScrollViewer)
+            {
+                return;
+            }
+
+            if (d is System.Windows.Controls.ScrollViewer scrollViewer)
+            {
+                if ((Orientation) e.NewValue == Orientation.Horizontal)
+                {
+                    scrollViewer.PreviewMouseWheel += ScrollViewer_PreviewMouseWheel;
+                }
+                else
+                {
+                    scrollViewer.PreviewMouseWheel -= ScrollViewer_PreviewMouseWheel;
+                }
+            }
+        }
+
+        private static void ScrollViewer_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e)
+        {
+            var scrollViewer = (System.Windows.Controls.ScrollViewer) sender;
+            scrollViewer.ScrollToHorizontalOffset(Math.Min(Math.Max(0, scrollViewer.HorizontalOffset - e.Delta), scrollViewer.ScrollableWidth));
+
+            e.Handled = true;
+        }
+
+        public static void SetOrientation(DependencyObject element, Orientation value)
+            => element.SetValue(OrientationProperty, ValueBoxes.OrientationBox(value));
+
+        public static Orientation GetOrientation(DependencyObject element)
+            => (Orientation) element.GetValue(OrientationProperty);
     }
 }

src/Shared/HandyControl_Shared/Controls/Other/ScrollViewer.cs

@@ -17,21 +17,6 @@ namespace HandyControl.Controls
 
         private bool _isRunning;
 
-        /// <summary>
-        ///     滚动方向
-        /// </summary>
-        public static readonly DependencyProperty OrientationProperty = DependencyProperty.Register(
-            "Orientation", typeof(Orientation), typeof(ScrollViewer), new PropertyMetadata(Orientation.Vertical));
-
-        /// <summary>
-        ///     滚动方向
-        /// </summary>
-        public Orientation Orientation
-        {
-            get => (Orientation) GetValue(OrientationProperty);
-            set => SetValue(OrientationProperty, value);
-        }
-
         /// <summary>
         ///     是否响应鼠标滚轮操作
         /// </summary>
@@ -53,7 +38,7 @@ namespace HandyControl.Controls
 
             if (!IsInertiaEnabled)
             {
-                if (Orientation == Orientation.Vertical)
+                if (ScrollViewerAttach.GetOrientation(this) == Orientation.Vertical)
                 {
                     base.OnMouseWheel(e);
                 }
@@ -68,7 +53,7 @@ namespace HandyControl.Controls
             }
             e.Handled = true;
 
-            if (Orientation == Orientation.Vertical)
+            if (ScrollViewerAttach.GetOrientation(this) == Orientation.Vertical)
             {
                 if (!_isRunning)
                 {

src/Shared/HandyControl_Shared/Data/ValueBoxes.cs

@@ -1,4 +1,6 @@
-namespace HandyControl.Data
+using System.Windows.Controls;
+
+namespace HandyControl.Data
 {
     /// <summary>
     ///     装箱后的值类型（用于提高效率）
@@ -9,6 +11,10 @@
 
         internal static object FalseBox = false;
 
+        internal static object VerticalBox = Orientation.Vertical;
+
+        internal static object HorizontalBox = Orientation.Horizontal;
+
         internal static object Double0Box = .0;
 
         internal static object Double01Box = .1;
@@ -38,5 +44,8 @@
         internal static object Int99Box = 99;
 
         internal static object BooleanBox(bool value) => value ? TrueBox : FalseBox;
+
+        internal static object OrientationBox(Orientation value) =>
+            value == Orientation.Horizontal ? HorizontalBox : VerticalBox;
     }
 }

src/Shared/HandyControl_Shared/Themes/Styles/Base/TabControlBaseStyle.xaml

@@ -291,7 +291,7 @@
                     </Border.CacheMode>
                     <RepeatButton Focusable="False" Style="{StaticResource RepeatButtonIcon}" Padding="8" hc:IconElement.Geometry="{StaticResource LeftGeometry}" Foreground="{DynamicResource PrimaryTextBrush}" Background="{DynamicResource SecondaryRegionBrush}" x:Name="PART_ScrollButtonLeft"/>
                 </Border>
-                <hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
+                <hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" hc:ScrollViewerAttach.Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
                     <Border Background="{TemplateBinding Background}" BorderThickness="0,0,0,1" BorderBrush="{DynamicResource BorderBrush}" Name="PART_HeaderBorder">
                         <hc:TabPanel MinHeight="{TemplateBinding TabItemHeight}" TabItemHeight="{TemplateBinding TabItemHeight}" TabItemWidth="{TemplateBinding TabItemWidth}" IsTabFillEnabled="{TemplateBinding IsTabFillEnabled}" Margin="0,0,-1,-1" x:Name="PART_HeaderPanel" HorizontalAlignment="Left" Background="{DynamicResource SecondaryTextBrush}" IsItemsHost="true" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1">
                             <interactivity:Interaction.Behaviors>

src/Shared/HandyControl_Shared/Themes/Theme.xaml

@@ -10992,7 +10992,7 @@
 					</Border.CacheMode>
 					<RepeatButton Focusable="False" Style="{StaticResource RepeatButtonIcon}" Padding="8" hc:IconElement.Geometry="{StaticResource LeftGeometry}" Foreground="{DynamicResource PrimaryTextBrush}" Background="{DynamicResource SecondaryRegionBrush}" x:Name="PART_ScrollButtonLeft" />
 				</Border>
-				<hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
+				<hc:ScrollViewer HorizontalScrollBarVisibility="Hidden" CanMouseWheel="True" hc:ScrollViewerAttach.Orientation="Horizontal" IsInertiaEnabled="True" Grid.Row="0" Grid.Column="1" IsDeferredScrollingEnabled="True" x:Name="PART_OverflowScrollviewer">
 					<Border Background="{TemplateBinding Background}" BorderThickness="0,0,0,1" BorderBrush="{DynamicResource BorderBrush}" Name="PART_HeaderBorder">
 						<hc:TabPanel MinHeight="{TemplateBinding TabItemHeight}" TabItemHeight="{TemplateBinding TabItemHeight}" TabItemWidth="{TemplateBinding TabItemWidth}" IsTabFillEnabled="{TemplateBinding IsTabFillEnabled}" Margin="0,0,-1,-1" x:Name="PART_HeaderPanel" HorizontalAlignment="Left" Background="{DynamicResource SecondaryTextBrush}" IsItemsHost="true" KeyboardNavigation.TabIndex="1" Panel.ZIndex="1">
 							<interactivity:Interaction.Behaviors>