Cys_Control（五） MMenu

一、查看Menu原样式

1、通过Blend查看Menu原有样式

Menu的原有样式结构较为简单，由边框Border及集合控件 ItemsPresenter 组成，原有样式如下

<Style x:Key="MenuStyle1" TargetType="{x:Type Menu}">
    <Setter Property="Background" Value="{StaticResource Menu.Static.Background}"/>
    <Setter Property="FontFamily" Value="{DynamicResource {x:Static SystemFonts.MenuFontFamilyKey}}"/>
    <Setter Property="FontSize" Value="{DynamicResource {x:Static SystemFonts.MenuFontSizeKey}}"/>
    <Setter Property="FontStyle" Value="{DynamicResource {x:Static SystemFonts.MenuFontStyleKey}}"/>
    <Setter Property="FontWeight" Value="{DynamicResource {x:Static SystemFonts.MenuFontWeightKey}}"/>
    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.MenuTextBrushKey}}"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Menu}">
                <Border Background="{TemplateBinding Background}" 
                                BorderThickness="{TemplateBinding BorderThickness}"
                                BorderBrush="{TemplateBinding BorderBrush}"
                                Padding="{TemplateBinding Padding}"
                                SnapsToDevicePixels="true">
                    <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

2、MenuItem主体部分

Menu 的主要样式 集中在MenuItem上，MenuItem比较复杂，这里为了方便浏览我们分批查看，首先查看MenuItem的主体部分

<Style x:Key="MenuItemStyle1" TargetType="{x:Type MenuItem}">
    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="BorderBrush" Value="Transparent"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
    <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
    <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
    <Style.Triggers>
        <Trigger Property="Role" Value="TopLevelHeader">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="Foreground" Value="{StaticResource Menu.Static.Foreground}"/>
            <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
            <Setter Property="Padding" Value="6,0"/>
        </Trigger>
        <Trigger Property="Role" Value="TopLevelItem">
            <Setter Property="Background" Value="{StaticResource Menu.Static.Background}"/>
            <Setter Property="BorderBrush" Value="{StaticResource Menu.Static.Border}"/>
            <Setter Property="Foreground" Value="{StaticResource Menu.Static.Foreground}"/>
            <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=TopLevelItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
            <Setter Property="Padding" Value="6,0"/>
        </Trigger>
        <Trigger Property="Role" Value="SubmenuHeader">
            <Setter Property="Template" Value="{DynamicResource {ComponentResourceKey ResourceId=SubmenuHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}}"/>
        </Trigger>
    </Style.Triggers>
</Style>

 MenuItem有个Role属性， 如下图,定义了四种角色（TopLevelHeader（绿色）、TopLevelItem（橘黄色）、SubmenuHeader（红色）、SubmenuItem（蓝色）），每种角色分别对应一个模板

分别看一下各部分的原有样式

3、TopLevelHeader模板

<ControlTemplate x:Key="{ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" SnapsToDevicePixels="true">
        <Grid VerticalAlignment="Center">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
            <Path x:Name="GlyphPanel" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{TemplateBinding Foreground}" Margin="3" VerticalAlignment="Center" Visibility="Collapsed"/>
            <ContentPresenter ContentSource="Header" Grid.Column="1" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
            <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" PlacementTarget="{Binding ElementName=templateRoot}">
                <Border x:Name="SubMenuBorder" Background="{StaticResource Menu.Static.Background}" BorderThickness="1" BorderBrush="{StaticResource Menu.Static.Border}" Padding="2">
                    <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                        <Grid RenderOptions.ClearTypeHint="Enabled">
                            <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                            </Canvas>
                            <Rectangle Fill="{StaticResource Menu.Static.Separator}" HorizontalAlignment="Left" Margin="29,2,0,2" Width="1"/>
                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                        </Grid>
                    </ScrollViewer>
                </Border>
            </Popup>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="IsSuspendingPopupAnimation" Value="true">
            <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
        </Trigger>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="true">
            <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
        </Trigger>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
            <Setter Property="Fill" TargetName="GlyphPanel" Value="{StaticResource Menu.Disabled.Foreground}"/>
        </Trigger>
        <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
            <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
            <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

4、TopLevelItem模板

<ControlTemplate x:Key="{ComponentResourceKey ResourceId=TopLevelItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" SnapsToDevicePixels="true">
        <Grid VerticalAlignment="Center">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
            <Path x:Name="GlyphPanel" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Margin="3" VerticalAlignment="Center" Visibility="Collapsed"/>
            <ContentPresenter ContentSource="Header" Grid.Column="1" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="true">
            <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
        </Trigger>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
            <Setter Property="Fill" TargetName="GlyphPanel" Value="{StaticResource Menu.Disabled.Foreground}"/>
        </Trigger>
        <MultiTrigger>
            <MultiTrigger.Conditions>
                <Condition Property="IsHighlighted" Value="True"/>
                <Condition Property="IsEnabled" Value="False"/>
            </MultiTrigger.Conditions>
            <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Background}"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Border}"/>
        </MultiTrigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

5、SubmenuHeader模板

<ControlTemplate x:Key="{ComponentResourceKey ResourceId=SubmenuHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Height="22" SnapsToDevicePixels="true">
        <Grid Margin="-1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition MinWidth="22" SharedSizeGroup="MenuItemIconColumnGroup" Width="Auto"/>
                <ColumnDefinition Width="13"/>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="30"/>
                <ColumnDefinition SharedSizeGroup="MenuItemIGTColumnGroup" Width="Auto"/>
                <ColumnDefinition Width="20"/>
            </Grid.ColumnDefinitions>
            <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
            <Border x:Name="GlyphPanel" Background="{StaticResource MenuItem.Highlight.Background}" BorderThickness="1" BorderBrush="{StaticResource MenuItem.Highlight.Border}" Height="22" Margin="-1,0,0,0" VerticalAlignment="Center" Visibility="Hidden" Width="22">
                <Path x:Name="Glyph" Data="{DynamicResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Height="11" Width="9"/>
            </Border>
            <ContentPresenter ContentSource="Header" Grid.Column="2" HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            <TextBlock Grid.Column="4" Margin="{TemplateBinding Padding}" Opacity="0.7" Text="{TemplateBinding InputGestureText}" VerticalAlignment="Center"/>
            <Path x:Name="RightArrow" Grid.Column="5" Data="{StaticResource RightArrow}" Fill="{StaticResource Menu.Static.Foreground}" HorizontalAlignment="Left" Margin="10,0,0,0" VerticalAlignment="Center"/>
            <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" HorizontalOffset="-2" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" Placement="Right" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" VerticalOffset="-3">
                <Border x:Name="SubMenuBorder" Background="{StaticResource Menu.Static.Background}" BorderThickness="1" BorderBrush="{StaticResource Menu.Static.Border}" Padding="2">
                    <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                        <Grid RenderOptions.ClearTypeHint="Enabled">
                            <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                            </Canvas>
                            <Rectangle Fill="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}" HorizontalAlignment="Left" Margin="29,2,0,2" Width="1"/>
                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                        </Grid>
                    </ScrollViewer>
                </Border>
            </Popup>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="IsSuspendingPopupAnimation" Value="true">
            <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
        </Trigger>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="True">
            <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter Property="Background" TargetName="templateRoot" Value="Transparent"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
        </Trigger>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
            <Setter Property="Fill" TargetName="Glyph" Value="{StaticResource Menu.Disabled.Foreground}"/>
            <Setter Property="Fill" TargetName="RightArrow" Value="{StaticResource Menu.Disabled.Foreground}"/>
        </Trigger>
        <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
            <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
            <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

6、SubmenuItem模板

<ControlTemplate x:Key="{ComponentResourceKey ResourceId=SubmenuItemTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Height="22" SnapsToDevicePixels="true">
        <Grid Margin="-1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition MinWidth="22" SharedSizeGroup="MenuItemIconColumnGroup" Width="Auto"/>
                <ColumnDefinition Width="13"/>
                <ColumnDefinition Width="*"/>
                <ColumnDefinition Width="30"/>
                <ColumnDefinition SharedSizeGroup="MenuItemIGTColumnGroup" Width="Auto"/>
                <ColumnDefinition Width="20"/>
            </Grid.ColumnDefinitions>
            <ContentPresenter x:Name="Icon" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
            <Border x:Name="GlyphPanel" Background="{StaticResource MenuItem.Selected.Background}" BorderThickness="1" BorderBrush="{StaticResource MenuItem.Selected.Border}" ClipToBounds="False" HorizontalAlignment="Center" Height="22" Margin="-1,0,0,0" VerticalAlignment="Center" Visibility="Hidden" Width="22">
                <Path x:Name="Glyph" Data="{StaticResource Checkmark}" FlowDirection="LeftToRight" Fill="{StaticResource Menu.Static.Foreground}" Height="11" Width="10"/>
            </Border>
            <ContentPresenter x:Name="menuHeaderContainer" ContentSource="Header" Grid.Column="2" HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            <TextBlock x:Name="menuGestureText" Grid.Column="4" Margin="{TemplateBinding Padding}" Opacity="0.7" Text="{TemplateBinding InputGestureText}" VerticalAlignment="Center"/>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="True">
            <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Background}"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Border}"/>
        </Trigger>
        <Trigger Property="IsEnabled" Value="False">
            <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="{StaticResource Menu.Disabled.Foreground}"/>
            <Setter Property="Fill" TargetName="Glyph" Value="{StaticResource Menu.Disabled.Foreground}"/>
        </Trigger>
        <MultiTrigger>
            <MultiTrigger.Conditions>
                <Condition Property="IsHighlighted" Value="True"/>
                <Condition Property="IsEnabled" Value="False"/>
            </MultiTrigger.Conditions>
            <Setter Property="Background" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Background}"/>
            <Setter Property="BorderBrush" TargetName="templateRoot" Value="{StaticResource MenuItem.Highlight.Disabled.Border}"/>
        </MultiTrigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

7、Template分析

由上述可知，重写样式即修改这四部分模板

3、4对比来看TopLevelHeader比TopLevelItem多了Popup部分，

5，6对比来看SubmenuHeader比SubmenuItem也是多了Popup部分，

接下来分别重写4部分模板

二、创建 CustomControl

1、新建MMenu 

新建CustomControl 命名为MMenu 并添加相应的Xaml样式

<Style TargetType="{x:Type local:MMenu}">
    <Setter Property="Foreground" Value="{DynamicResource ColorBrush.FontDefaultColor}"/>
    <Setter Property="Background" Value="Transparent"/>
    <Setter Property="Width" Value="Auto"/>
    <Setter Property="Height" Value="35"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type local:MMenu}">
                <Border Background="{TemplateBinding Background}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        BorderBrush="{TemplateBinding BorderBrush}" 
                        Padding="{TemplateBinding Padding}" 
                        SnapsToDevicePixels="true">
                    <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

这里的主要样式在MenuItem上，故Menu样式不做过多改变

2、新建MMenuItem

新建CustomControl命名为MMenuItem并添加相应Xaml样式

<Style TargetType="{x:Type local:MMenuItem}">
    <Setter Property="BorderBrush" Value="{DynamicResource ColorBrush.SuccessBorderBrushColor}"/>
    <Setter Property="Background" Value="{DynamicResource ColorBrush.SuccessBackgroundColor}"/>
    <Setter Property="Foreground" Value="{DynamicResource ColorBrush.FontPrimaryColor}"/>
    <Setter Property="FontSize" Value="14"/>
    <Setter Property="Cursor" Value="Hand"/>
    <Setter Property="Height" Value="30"/>
    <Setter Property="Width" Value="Auto"/>
    <Setter Property="MinWidth" Value="100"/>
    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
    <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
    <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
    <Setter Property="Template" Value="{StaticResource MSubmenuItemTemplate}"/>
    <Style.Triggers>
        <Trigger Property="Role" Value="TopLevelHeader">
            <Setter Property="BorderThickness" Value="0,0,1,0"/>
            <Setter Property="Template" Value="{StaticResource MTopLevelHeaderTemplate}"/>
        </Trigger>
        <Trigger Property="Role" Value="TopLevelItem">
            <Setter Property="BorderThickness" Value="0,0,1,0"/>
            <Setter Property="Template" Value="{StaticResource MTopLevelItemTemplate}"/>
        </Trigger>
        <Trigger Property="Role" Value="SubmenuHeader">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Foreground" Value="{DynamicResource ColorBrush.FontDefaultColor}"/>
            <Setter Property="Template" Value="{StaticResource MSubmenuHeaderTemplate}"/>
            <Setter Property="Padding" Value="3,0,0,0"/>
        </Trigger>
        <Trigger Property="Role" Value="SubmenuItem">
            <Setter Property="Foreground" Value="{DynamicResource ColorBrush.FontDefaultColor}"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Template" Value="{StaticResource MSubmenuItemTemplate}"/>
            <Setter Property="Padding" Value="3,0,0,0"/>
        </Trigger>
    </Style.Triggers>
</Style>

根据触发器中命名的4部分角色分别重写样式

3、MTopLevelHeaderTemplate

<ControlTemplate x:Key="MTopLevelHeaderTemplate" TargetType="{x:Type local:MMenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" CornerRadius="{TemplateBinding CornerRadius}" SnapsToDevicePixels="true">
        <Grid>
            <Grid VerticalAlignment="Center" HorizontalAlignment="Center" x:Name="PART_TextGrid" Opacity="0.8">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="Auto"/>
                </Grid.ColumnDefinitions>
                <TextBlock x:Name="Icon" FontSize="25" HorizontalAlignment="Center" Text="{TemplateBinding Icon}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
                <ContentPresenter ContentSource="Header" HorizontalAlignment="Center" Grid.Column="1" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            </Grid>
            <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" 
                   Placement="Bottom" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" PlacementTarget="{Binding ElementName=templateRoot}" MinWidth="120">
                <Border x:Name="SubMenuBorder" Margin="0 0 5 5" >
                    <Border.Effect>
                        <DropShadowEffect Color="{DynamicResource Color.MenuItemDropShadowBrush}" Opacity="0.3" ShadowDepth="3"/>
                    </Border.Effect>
                    <Border Background="{DynamicResource ColorBrush.MenuItemPopBackground}" BorderThickness="1" CornerRadius="5" BorderBrush="{DynamicResource ColorBrush.MenuItemPopBorderBrush}" >
                        <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}" Margin="0,5">
                            <Grid RenderOptions.ClearTypeHint="Enabled" Background="Transparent">
                                <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                    <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" 
                                                   Height="{Binding ActualHeight, ElementName=SubMenuBorder}"
                                                   Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                                </Canvas>
                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" 
                                                    Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                            </Grid>
                        </ScrollViewer>
                    </Border>
                </Border>
            </Popup>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="IsSuspendingPopupAnimation" Value="true">
            <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
        </Trigger>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
            <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
            <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter TargetName="templateRoot" Property="Background"  Value="{DynamicResource ColorBrush.SuccessBackgroundOverColor}"/>
            <Setter TargetName="PART_TextGrid" Property="Opacity"  Value="1"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

4、MTopLevelItemTemplate

<ControlTemplate x:Key="MTopLevelItemTemplate" TargetType="{x:Type local:MMenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" CornerRadius="{TemplateBinding CornerRadius}" SnapsToDevicePixels="true">
        <Grid VerticalAlignment="Center" HorizontalAlignment="Center" x:Name="PART_TextGrid" Opacity="0.8">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <TextBlock x:Name="Icon" FontSize="25" HorizontalAlignment="Center" Text="{TemplateBinding Icon}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            <ContentPresenter ContentSource="Header" HorizontalAlignment="Center" Grid.Column="1" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter TargetName="templateRoot" Property="Background"  Value="{DynamicResource ColorBrush.SuccessBackgroundOverColor}"/>
            <Setter TargetName="PART_TextGrid" Property="Opacity"  Value="1"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

5、MSubmenuHeaderTemplate

<ControlTemplate  x:Key="MSubmenuHeaderTemplate" TargetType="{x:Type local:MMenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" 
                BorderThickness="{TemplateBinding BorderThickness}"
                BorderBrush="{TemplateBinding BorderBrush}" Height="30" 
                SnapsToDevicePixels="true">
        <Grid >
            <Grid HorizontalAlignment="Left" VerticalAlignment="Center">
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="Auto"/>
                    <ColumnDefinition Width="Auto"/>
                </Grid.ColumnDefinitions>
                <TextBlock Grid.Column="0" x:Name="Icon" Margin="10,0,0,0" FontSize="25" HorizontalAlignment="Center" Text="{TemplateBinding Icon}"
                               SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
                <ContentPresenter Grid.Column="1" ContentSource="Header"  HorizontalAlignment="Center" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            </Grid>
            <Path x:Name="RightArrow" Data="M 0,0 L 7,7 L 0,14 Z" 
                      Fill="{TemplateBinding Foreground}" 
                      HorizontalAlignment="Right" Margin="0,0,5,0" VerticalAlignment="Center" Opacity="0.6"/>

            <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" 
                   Placement="Right" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" PlacementTarget="{Binding ElementName=templateRoot}" MinWidth="120">
                <Border x:Name="SubMenuBorder" Margin="0 0 5 5" >
                    <Border.Effect>
                        <DropShadowEffect Color="{DynamicResource Color.MenuItemDropShadowBrush}" Opacity="0.3" ShadowDepth="3"/>
                    </Border.Effect>
                    <Border Background="{DynamicResource ColorBrush.MenuItemPopBackground}" BorderThickness="1" CornerRadius="5" BorderBrush="{DynamicResource ColorBrush.MenuItemPopBorderBrush}" >
                        <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}" Margin="0,5">
                            <Grid RenderOptions.ClearTypeHint="Enabled" Background="Transparent">
                                <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                    <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" 
                                                   Height="{Binding ActualHeight, ElementName=SubMenuBorder}"
                                                   Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                                </Canvas>
                                <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" 
                                                    Grid.IsSharedSizeScope="true" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                            </Grid>
                        </ScrollViewer>
                    </Border>
                </Border>
            </Popup>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="IsSuspendingPopupAnimation" Value="true">
            <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
        </Trigger>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="True">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="ScrollViewer.CanContentScroll" SourceName="SubMenuScrollViewer" Value="false">
            <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
            <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter TargetName="templateRoot" Property="Background"  Value="{DynamicResource ColorBrush.MenuItemOverBackground}"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

6、MSubmenuItemTemplate

<ControlTemplate x:Key="MSubmenuItemTemplate" TargetType="{x:Type local:MMenuItem}">
    <Border x:Name="templateRoot" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" Height="30" SnapsToDevicePixels="true">
        <Grid HorizontalAlignment="Left" VerticalAlignment="Center">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
            </Grid.ColumnDefinitions>
            <TextBlock Grid.Column="0" x:Name="Icon" Margin="10,0,0,0" FontSize="25" HorizontalAlignment="Center" Text="{TemplateBinding Icon}"
                       SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            <ContentPresenter Grid.Column="1" x:Name="menuHeaderContainer"  HorizontalAlignment="Center" ContentSource="Header" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" 
                              SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
        </Grid>
    </Border>
    <ControlTemplate.Triggers>
        <Trigger Property="Icon" Value="{x:Null}">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsChecked" Value="True">
            <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="True">
            <Setter TargetName="templateRoot" Property="Background"  Value="{DynamicResource ColorBrush.MenuItemOverBackground}"/>
        </Trigger>
    </ControlTemplate.Triggers>
</ControlTemplate>

三、效果图

 下拉框中内容可自行配色

四、源码地址

gitee地址：https://gitee.com/sirius_machao/Cys_Controls/tree/dev/