feat(DrawerHost): add CornerRadius property

src/MaterialDesignThemes.Wpf/Converters/DrawerOffsetConverter.cs

@@ -1,4 +1,4 @@
-using System.Globalization;
+using System.Globalization;
 using System.Windows.Data;
 
 namespace MaterialDesignThemes.Wpf.Converters;
@@ -14,10 +14,10 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
         Dock dock = (parameter is Dock) ? (Dock)parameter : Dock.Left;
         return dock switch
         {
-            Dock.Top => new Thickness(0, 0 - d, 0, 0),
-            Dock.Bottom => new Thickness(0, 0, 0, 0 - d),
-            Dock.Right => new Thickness(0, 0, 0 - d, 0),
-            _ => (object)new Thickness(0 - d, 0, 0, 0),
+            Dock.Top => new Thickness(0, -d, 0, 0),
+            Dock.Bottom => new Thickness(0, 0, 0, -d),
+            Dock.Right => new Thickness(0, 0, -d, 0),
+            _ => new Thickness(-d, 0, 0, 0),
         };
     }
 

src/MaterialDesignThemes.Wpf/DrawerHost.cs

@@ -81,6 +81,15 @@ public Brush? OverlayBackground
         set => SetValue(OverlayBackgroundProperty, value);
     }
 
+    public static readonly DependencyProperty CornerRadiusProperty = DependencyProperty.Register(
+        nameof(CornerRadius), typeof(CornerRadius), typeof(DrawerHost), new PropertyMetadata(default(CornerRadius)));
+
+    public CornerRadius CornerRadius
+    {
+        get => (CornerRadius)GetValue(CornerRadiusProperty);
+        set => SetValue(CornerRadiusProperty, value);
+    }
+
     public DrawerHostOpenMode OpenMode
     {
         get => (DrawerHostOpenMode)GetValue(OpenModeProperty);

src/MaterialDesignThemes.Wpf/Themes/Generic.xaml

@@ -1,4 +1,4 @@
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:converters="clr-namespace:MaterialDesignThemes.Wpf.Converters"
                     xmlns:local="clr-namespace:MaterialDesignThemes.Wpf"
@@ -12,7 +12,7 @@
       as part of Material Design in XAML Toolkit. Other themes, for existing controls
       must be selected manually by the user, so that they override default styles.
       The easiest way to do this is include:
-
+      
       MaterialDesignTheme.Defaults.xaml
       in your App.xaml
     -->
@@ -953,16 +953,17 @@
                   </ContentPresenter.Tag>
                 </ContentPresenter>
               </AdornerDecorator>
-              <Grid x:Name="PART_ContentCover"
-                    Grid.Row="0"
-                    Grid.RowSpan="3"
-                    Grid.Column="0"
-                    Grid.ColumnSpan="3"
-                    Focusable="False"
-                    IsHitTestVisible="False"
-                    Opacity="0">
-                <Grid.Style>
-                  <Style TargetType="Grid">
+              <Border x:Name="PART_ContentCover"
+                      Grid.Row="0"
+                      Grid.RowSpan="3"
+                      Grid.Column="0"
+                      Grid.ColumnSpan="3"
+                      CornerRadius="{TemplateBinding CornerRadius}"
+                      Focusable="False"
+                      IsHitTestVisible="False"
+                      Opacity="0">
+                <Border.Style>
+                  <Style TargetType="Border">
                     <Setter Property="Background" Value="{Binding OverlayBackground, RelativeSource={RelativeSource TemplatedParent}}" />
                     <Style.Triggers>
                       <DataTrigger Binding="{Binding OpenMode, RelativeSource={RelativeSource TemplatedParent}}" Value="Standard">
@@ -973,8 +974,8 @@
                       </Trigger>
                     </Style.Triggers>
                   </Style>
-                </Grid.Style>
-              </Grid>
+                </Border.Style>
+              </Border>
               <Grid x:Name="PART_LeftDrawer"
                     Margin="{Binding RelativeSource={RelativeSource Self}, Path=ActualWidth, Converter={x:Static converters:DrawerOffsetConverter.Instance}, ConverterParameter={x:Static Dock.Left}}"
                     HorizontalAlignment="Left"
@@ -999,6 +1000,7 @@
                   <Border x:Name="LeftDrawerShadow"
                           Background="{TemplateBinding LeftDrawerBackground}"
                           CornerRadius="{TemplateBinding LeftDrawerCornerRadius}"
+                          Margin="-1,-1,0,-1"
                           Opacity="0">
                     <Border.Style>
                       <Style TargetType="Border">
@@ -1041,6 +1043,7 @@
                   <Border x:Name="RightDrawerShadow"
                           Background="{TemplateBinding RightDrawerBackground}"
                           CornerRadius="{TemplateBinding RightDrawerCornerRadius}"
+                          Margin="0,-1,-1,-1"
                           Opacity="0">
                     <Border.Style>
                       <Style TargetType="Border">
@@ -1083,6 +1086,7 @@
                   <Border x:Name="TopDrawerShadow"
                           Background="{TemplateBinding TopDrawerBackground}"
                           CornerRadius="{TemplateBinding TopDrawerCornerRadius}"
+                          Margin="-1,-1,-1,0"
                           Opacity="0">
                     <Border.Style>
                       <Style TargetType="Border">
@@ -1125,6 +1129,7 @@
                   <Border x:Name="BottomDrawerShadow"
                           Background="{TemplateBinding BottomDrawerBackground}"
                           CornerRadius="{TemplateBinding BottomDrawerCornerRadius}"
+                          Margin="-1,0,-1,-1"
                           Opacity="0">
                     <Border.Style>
                       <Style TargetType="Border">