Стили и шаблоны элемента Menu

В этом разделе описываются стили и шаблоны для Menu элемента управления. Вы можете изменить значение по умолчанию ControlTemplate предоставить уникальный внешний вид элемента управления. Подробнее см. в разделе Настройка внешнего вида существующего элемента управления путем создания объекта ControlTemplate.

Menu Управления не имеет частей с именами.

При создании ControlTemplate для Menu, шаблон может содержать ItemsPresenter в ScrollViewer. ( ItemsPresenter Отображает каждый элемент в Menu; ScrollViewer дает возможность прокрутки в элементе управления). Если ItemsPresenter не является прямым потомком ScrollViewer, необходимо предоставить ItemsPresenter имя ItemsPresenter.

В следующей таблице перечислены визуальные состояния Menu элемента управления.

Имя VisualState Имя VisualStateGroup Описание
Valid ValidationStates Элемент управления использует Validation класс и Validation.HasError присоединенное свойство false.
InvalidFocused ValidationStates Validation.HasError Присоединенное свойство true имеет элемент управления имеет фокус.
InvalidUnfocused ValidationStates Validation.HasError Присоединенное свойство true имеет элемент управления не имеет фокуса.

В следующей таблице перечислены именованные части Menu элемента управления.

Отделение Тип Описание
PART_Popup Popup Область для подменю.

При создании ControlTemplate для MenuItem, шаблон может содержать ItemsPresenter в ScrollViewer. ( ItemsPresenter Отображает каждый элемент в MenuItem; ScrollViewer дает возможность прокрутки в элементе управления). Если ItemsPresenter не является прямым потомком ScrollViewer, необходимо предоставить ItemsPresenter имя ItemsPresenter.

В следующей таблице перечислены визуальные состояния MenuItem элемента управления.

Имя VisualState Имя VisualStateGroup Описание
Valid ValidationStates Элемент управления использует Validation класс и Validation.HasError присоединенное свойство false.
InvalidFocused ValidationStates Validation.HasError Присоединенное свойство true имеет элемент управления имеет фокус.
InvalidUnfocused ValidationStates Validation.HasError Присоединенное свойство true имеет элемент управления не имеет фокуса.

В следующем примере показано определение ControlTemplate для Menu элемента управления.

<Style x:Key="{x:Type Menu}"
       TargetType="{x:Type Menu}">
  <Setter Property="OverridesDefaultStyle"
          Value="True" />
  <Setter Property="SnapsToDevicePixels"
          Value="True" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type Menu}">
        <Border BorderThickness="1">
          <Border.BorderBrush>
            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="0,1">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource BorderLightColor}"
                                Offset="0.0" />
                  <GradientStop Color="{DynamicResource BorderDarkColor}"
                                Offset="1.0" />
                </GradientStopCollection>
              </LinearGradientBrush.GradientStops>
            </LinearGradientBrush>

          </Border.BorderBrush>
          <Border.Background>
            <LinearGradientBrush EndPoint="0.5,1"
                                 StartPoint="0.5,0">
              <GradientStop Color="{DynamicResource ControlLightColor}"
                            Offset="0" />
              <GradientStop Color="{DynamicResource ControlMediumColor}"
                            Offset="1" />
            </LinearGradientBrush>
          </Border.Background>
          <StackPanel ClipToBounds="True"
                      Orientation="Horizontal"
                      IsItemsHost="True" />
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

В следующем примере показано определение ControlTemplate для MenuItem элемента управления.

<Style x:Key="{x:Static MenuItem.SeparatorStyleKey}"
       TargetType="{x:Type Separator}">
  <Setter Property="Height"
          Value="1" />
  <Setter Property="Margin"
          Value="0,4,0,4" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type Separator}">
        <Border BorderThickness="1">
          <Border.BorderBrush>
            <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
          </Border.BorderBrush>
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<!-- TopLevelHeader -->
<ControlTemplate x:Key="{x:Static MenuItem.TopLevelHeaderTemplateKey}"
                 TargetType="{x:Type MenuItem}">
  <Border x:Name="Border">
    <Grid>
      <ContentPresenter Margin="6,3,6,3"
                        ContentSource="Header"
                        RecognizesAccessKey="True" />
      <Popup x:Name="Popup"
             Placement="Bottom"
             IsOpen="{TemplateBinding IsSubmenuOpen}"
             AllowsTransparency="True"
             Focusable="False"
             PopupAnimation="Fade">
        <Border x:Name="SubmenuBorder"
                SnapsToDevicePixels="True"
                BorderThickness="1"
                Background="{DynamicResource MenuPopupBrush}">
          <Border.BorderBrush>
            <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
          </Border.BorderBrush>
          <ScrollViewer CanContentScroll="True"
                        Style="{StaticResource MenuScrollViewer}">
            <StackPanel IsItemsHost="True"
                        KeyboardNavigation.DirectionalNavigation="Cycle" />
          </ScrollViewer>
        </Border>
      </Popup>
    </Grid>
  </Border>
  <ControlTemplate.Triggers>
    <Trigger Property="IsSuspendingPopupAnimation"
             Value="true">
      <Setter TargetName="Popup"
              Property="PopupAnimation"
              Value="None" />
    </Trigger>
    <Trigger Property="IsHighlighted"
             Value="true">
      <Setter TargetName="Border"
              Property="BorderBrush"
              Value="Transparent" />
      <Setter Property="Background"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush StartPoint="0,0"
                               EndPoint="0,1">
            <LinearGradientBrush.GradientStops>
              <GradientStopCollection>
                <GradientStop Color="{StaticResource ControlLightColor}" />
                <GradientStop Color="{StaticResource ControlMouseOverColor}"
                              Offset="1.0" />
              </GradientStopCollection>
            </LinearGradientBrush.GradientStops>
          </LinearGradientBrush>

        </Setter.Value>
      </Setter>
    </Trigger>
    <Trigger SourceName="Popup"
             Property="AllowsTransparency"
             Value="True">
      <Setter TargetName="SubmenuBorder"
              Property="CornerRadius"
              Value="0,0,4,4" />
      <Setter TargetName="SubmenuBorder"
              Property="Padding"
              Value="0,0,0,3" />
    </Trigger>
    <Trigger Property="IsEnabled"
             Value="False">
      <Setter Property="Foreground">
        <Setter.Value>
          <SolidColorBrush Color="{StaticResource DisabledForegroundColor}" />
        </Setter.Value>
      </Setter>
    </Trigger>
  </ControlTemplate.Triggers>
</ControlTemplate>

<!-- TopLevelItem -->
<ControlTemplate x:Key="{x:Static MenuItem.TopLevelItemTemplateKey}"
                 TargetType="{x:Type MenuItem}">
  <Border x:Name="Border">
    <Grid>
      <ContentPresenter Margin="6,3,6,3"
                        ContentSource="Header"
                        RecognizesAccessKey="True" />
    </Grid>
  </Border>
  <ControlTemplate.Triggers>
    <Trigger Property="IsHighlighted"
             Value="true">
      <Setter Property="Background"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush StartPoint="0,0"
                               EndPoint="0,1">
            <LinearGradientBrush.GradientStops>
              <GradientStopCollection>
                <GradientStop Color="{StaticResource ControlLightColor}" />
                <GradientStop Color="{StaticResource ControlMouseOverColor}"
                              Offset="1.0" />
              </GradientStopCollection>
            </LinearGradientBrush.GradientStops>
          </LinearGradientBrush>

        </Setter.Value>
      </Setter>
    </Trigger>
    <Trigger Property="IsEnabled"
             Value="False">
      <Setter Property="Foreground">
        <Setter.Value>
          <SolidColorBrush Color="{StaticResource DisabledForegroundColor}" />
        </Setter.Value>
      </Setter>
    </Trigger>
  </ControlTemplate.Triggers>
</ControlTemplate>

<!-- SubmenuItem -->
<ControlTemplate x:Key="{x:Static MenuItem.SubmenuItemTemplateKey}"
                 TargetType="{x:Type MenuItem}">
  <Border x:Name="Border"
          BorderThickness="1">
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto"
                          SharedSizeGroup="Icon" />
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="Auto"
                          SharedSizeGroup="Shortcut" />
        <ColumnDefinition Width="13" />
      </Grid.ColumnDefinitions>
      <ContentPresenter x:Name="Icon"
                        Margin="6,0,6,0"
                        VerticalAlignment="Center"
                        ContentSource="Icon" />
      <Border x:Name="Check"
              Width="13"
              Height="13"
              Visibility="Collapsed"
              Margin="6,0,6,0"
              BorderThickness="1">
        <Border.BorderBrush>
          <LinearGradientBrush StartPoint="0,0"
                               EndPoint="0,1">
            <LinearGradientBrush.GradientStops>
              <GradientStopCollection>
                <GradientStop Color="{DynamicResource BorderLightColor}"
                              Offset="0.0" />
                <GradientStop Color="{DynamicResource BorderDarkColor}"
                              Offset="1.0" />
              </GradientStopCollection>
            </LinearGradientBrush.GradientStops>
          </LinearGradientBrush>

        </Border.BorderBrush>
        <Border.Background>
          <LinearGradientBrush StartPoint="0,0"
                               EndPoint="0,1">
            <LinearGradientBrush.GradientStops>
              <GradientStopCollection>
                <GradientStop Color="{DynamicResource ControlLightColor}" />
                <GradientStop Color="{DynamicResource ControlMediumColor}"
                              Offset="1.0" />
              </GradientStopCollection>
            </LinearGradientBrush.GradientStops>
          </LinearGradientBrush>
        </Border.Background>
        <Path x:Name="CheckMark"
              Width="7"
              Height="7"
              Visibility="Hidden"
              SnapsToDevicePixels="False"
              StrokeThickness="2"
              Data="M 0 0 L 7 7 M 0 7 L 7 0">
          <Path.Stroke>
            <SolidColorBrush Color="{DynamicResource GlyphColor}" />
          </Path.Stroke>
        </Path>
      </Border>
      <ContentPresenter x:Name="HeaderHost"
                        Grid.Column="1"
                        ContentSource="Header"
                        RecognizesAccessKey="True" />
      <TextBlock x:Name="InputGestureText"
                 Grid.Column="2"
                 Text="{TemplateBinding InputGestureText}"
                 Margin="5,2,0,2"
                 DockPanel.Dock="Right" />
    </Grid>
  </Border>
  <ControlTemplate.Triggers>
    <Trigger Property="ButtonBase.Command"
             Value="{x:Null}" />
    <Trigger Property="Icon"
             Value="{x:Null}">
      <Setter TargetName="Icon"
              Property="Visibility"
              Value="Hidden" />
    </Trigger>
    <Trigger Property="IsChecked"
             Value="true">
      <Setter TargetName="CheckMark"
              Property="Visibility"
              Value="Visible" />
    </Trigger>
    <Trigger Property="IsCheckable"
             Value="true">
      <Setter TargetName="Check"
              Property="Visibility"
              Value="Visible" />
      <Setter TargetName="Icon"
              Property="Visibility"
              Value="Hidden" />
    </Trigger>
    <Trigger Property="IsHighlighted"
             Value="true">
      <Setter Property="Background"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush EndPoint="0.5,1"
                               StartPoint="0.5,0">
            <GradientStop Color="Transparent"
                          Offset="0" />
            <GradientStop Color="{DynamicResource ControlMouseOverColor}"
                          Offset="1" />
          </LinearGradientBrush>
        </Setter.Value>
      </Setter>
      <Setter Property="BorderBrush"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush EndPoint="0.5,1"
                               StartPoint="0.5,0">
            <GradientStop Color="{DynamicResource BorderMediumColor}"
                          Offset="0" />
            <GradientStop Color="Transparent"
                          Offset="1" />
          </LinearGradientBrush>
        </Setter.Value>
      </Setter>
    </Trigger>
    <Trigger Property="IsEnabled"
             Value="false">
      <Setter Property="Foreground">
        <Setter.Value>
          <SolidColorBrush Color="{StaticResource DisabledForegroundColor}" />
        </Setter.Value>
      </Setter>
    </Trigger>
  </ControlTemplate.Triggers>
</ControlTemplate>

<ControlTemplate x:Key="{x:Static MenuItem.SubmenuHeaderTemplateKey}"
                 TargetType="{x:Type MenuItem}">
  <Border x:Name="Border"
          BorderThickness="1">
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto"
                          SharedSizeGroup="Icon" />
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="Auto"
                          SharedSizeGroup="Shortcut" />
        <ColumnDefinition Width="13" />
      </Grid.ColumnDefinitions>
      <ContentPresenter x:Name="Icon"
                        Margin="6,0,6,0"
                        VerticalAlignment="Center"
                        ContentSource="Icon" />
      <ContentPresenter x:Name="HeaderHost"
                        Grid.Column="1"
                        ContentSource="Header"
                        RecognizesAccessKey="True" />
      <TextBlock x:Name="InputGestureText"
                 Grid.Column="2"
                 Text="{TemplateBinding InputGestureText}"
                 Margin="5,2,2,2"
                 DockPanel.Dock="Right" />
      <Path Grid.Column="3"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Data="M 0 0 L 0 7 L 4 3.5 Z">
        <Path.Fill>
          <SolidColorBrush Color="{DynamicResource GlyphColor}" />
        </Path.Fill>
      </Path>
      <Popup x:Name="Popup"
             Placement="Right"
             HorizontalOffset="-4"
             IsOpen="{TemplateBinding IsSubmenuOpen}"
             AllowsTransparency="True"
             Focusable="False"
             PopupAnimation="Fade">
        <Border x:Name="SubmenuBorder"
                SnapsToDevicePixels="True"
                Background="{DynamicResource MenuPopupBrush}"
                BorderThickness="1">
          <Border.BorderBrush>
            <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
          </Border.BorderBrush>
          <ScrollViewer CanContentScroll="True"
                        Style="{StaticResource MenuScrollViewer}">
            <StackPanel IsItemsHost="True"
                        KeyboardNavigation.DirectionalNavigation="Cycle" />
          </ScrollViewer>
        </Border>
      </Popup>
    </Grid>
  </Border>
  <ControlTemplate.Triggers>
    <Trigger Property="Icon"
             Value="{x:Null}">
      <Setter TargetName="Icon"
              Property="Visibility"
              Value="Collapsed" />
    </Trigger>
    <Trigger Property="IsHighlighted"
             Value="true">
      <Setter Property="Background"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush EndPoint="0.5,1"
                               StartPoint="0.5,0">
            <GradientStop Color="Transparent"
                          Offset="0" />
            <GradientStop Color="{DynamicResource ControlMouseOverColor}"
                          Offset="1" />
          </LinearGradientBrush>
        </Setter.Value>
      </Setter>
      <Setter Property="BorderBrush"
              TargetName="Border">
        <Setter.Value>
          <LinearGradientBrush EndPoint="0.5,1"
                               StartPoint="0.5,0">
            <GradientStop Color="{DynamicResource BorderMediumColor}"
                          Offset="0" />
            <GradientStop Color="Transparent"
                          Offset="1" />
          </LinearGradientBrush>
        </Setter.Value>
      </Setter>
    </Trigger>
    <Trigger SourceName="Popup"
             Property="AllowsTransparency"
             Value="True">
      <Setter TargetName="SubmenuBorder"
              Property="CornerRadius"
              Value="4" />
      <Setter TargetName="SubmenuBorder"
              Property="Padding"
              Value="0,3,0,3" />
    </Trigger>
    <Trigger Property="IsEnabled"
             Value="false">
      <Setter Property="Foreground">
        <Setter.Value>
          <SolidColorBrush Color="{StaticResource DisabledForegroundColor}" />
        </Setter.Value>
      </Setter>
    </Trigger>
  </ControlTemplate.Triggers>
</ControlTemplate>

<!-- MenuItem Style -->
<Style x:Key="{x:Type MenuItem}"
       TargetType="{x:Type MenuItem}">
  <Setter Property="OverridesDefaultStyle"
          Value="True" />
  <Style.Triggers>
    <Trigger Property="Role"
             Value="TopLevelHeader">
      <Setter Property="Template"
              Value="{StaticResource {x:Static MenuItem.TopLevelHeaderTemplateKey}}" />
      <Setter Property="Grid.IsSharedSizeScope"
              Value="true" />
    </Trigger>
    <Trigger Property="Role"
             Value="TopLevelItem">
      <Setter Property="Template"
              Value="{StaticResource {x:Static MenuItem.TopLevelItemTemplateKey}}" />
    </Trigger>
    <Trigger Property="Role"
             Value="SubmenuHeader">
      <Setter Property="Template"
              Value="{StaticResource {x:Static MenuItem.SubmenuHeaderTemplateKey}}" />
    </Trigger>
    <Trigger Property="Role"
             Value="SubmenuItem">
      <Setter Property="Template"
              Value="{StaticResource {x:Static MenuItem.SubmenuItemTemplateKey}}" />
    </Trigger>
  </Style.Triggers>
</Style>

В следующем примере определяется MenuScrollViewer, используемый в предыдущем примере.

<!--ScrollViewer for a MenuItem-->
<MenuScrollingVisibilityConverter x:Key="MenuScrollingVisibilityConverter" />

<Style x:Key="MenuScrollViewer"
       TargetType="{x:Type ScrollViewer}"
       BasedOn="{x:Null}">
  <Setter Property="HorizontalScrollBarVisibility"
          Value="Hidden" />
  <Setter Property="VerticalScrollBarVisibility"
          Value="Auto" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type ScrollViewer}">
        <Grid SnapsToDevicePixels="True">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
            <RowDefinition Height="Auto" />
          </Grid.RowDefinitions>
          <Border Grid.Row="1"
                  Grid.Column="0">
            <ScrollContentPresenter Margin="{TemplateBinding Padding}" />
          </Border>
          <RepeatButton Style="{StaticResource MenuScrollButton}"
                        Grid.Row="0"
                        Grid.Column="0"
                        Command="{x:Static ScrollBar.LineUpCommand}"
                        CommandTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}"
                        Focusable="False">
            <RepeatButton.Visibility>
              <MultiBinding FallbackValue="Visibility.Collapsed"
                            Converter="{StaticResource MenuScrollingVisibilityConverter}"
                            ConverterParameter="0">
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ComputedVerticalScrollBarVisibility" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="VerticalOffset" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ExtentHeight" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ViewportHeight" />
              </MultiBinding>
            </RepeatButton.Visibility>
            <Path Fill="{DynamicResource {x:Static SystemColors.MenuTextBrushKey}}"
                  Data="{StaticResource UpArrow}" />
          </RepeatButton>
          <RepeatButton Style="{StaticResource MenuScrollButton}"
                        Grid.Row="2"
                        Grid.Column="0"
                        Command="{x:Static ScrollBar.LineDownCommand}"
                        CommandTarget="{Binding RelativeSource={RelativeSource TemplatedParent}}"
                        Focusable="False">
            <RepeatButton.Visibility>
              <MultiBinding FallbackValue="Visibility.Collapsed"
                            Converter="{StaticResource MenuScrollingVisibilityConverter}"
                            ConverterParameter="100">
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ComputedVerticalScrollBarVisibility" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="VerticalOffset" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ExtentHeight" />
                <Binding RelativeSource="{RelativeSource TemplatedParent}"
                         Path="ViewportHeight" />
              </MultiBinding>
            </RepeatButton.Visibility>
            <Path Fill="{DynamicResource {x:Static SystemColors.MenuTextBrushKey}}"
                  Data="{StaticResource DownArrow}" />
          </RepeatButton>
        </Grid>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

ControlTemplate Примерах используется один или несколько из следующих ресурсов.

<!--Control colors.-->
<Color x:Key="WindowColor">#FFE8EDF9</Color>
<Color x:Key="ContentAreaColorLight">#FFC5CBF9</Color>
<Color x:Key="ContentAreaColorDark">#FF7381F9</Color>

<Color x:Key="DisabledControlLightColor">#FFE8EDF9</Color>
<Color x:Key="DisabledControlDarkColor">#FFC5CBF9</Color>
<Color x:Key="DisabledForegroundColor">#FF888888</Color>

<Color x:Key="SelectedBackgroundColor">#FFC5CBF9</Color>
<Color x:Key="SelectedUnfocusedColor">#FFDDDDDD</Color>

<Color x:Key="ControlLightColor">White</Color>
<Color x:Key="ControlMediumColor">#FF7381F9</Color>
<Color x:Key="ControlDarkColor">#FF211AA9</Color>

<Color x:Key="ControlMouseOverColor">#FF3843C4</Color>
<Color x:Key="ControlPressedColor">#FF211AA9</Color>


<Color x:Key="GlyphColor">#FF444444</Color>
<Color x:Key="GlyphMouseOver">sc#1, 0.004391443, 0.002428215, 0.242281124</Color>

<!--Border colors-->
<Color x:Key="BorderLightColor">#FFCCCCCC</Color>
<Color x:Key="BorderMediumColor">#FF888888</Color>
<Color x:Key="BorderDarkColor">#FF444444</Color>

<Color x:Key="PressedBorderLightColor">#FF888888</Color>
<Color x:Key="PressedBorderDarkColor">#FF444444</Color>

<Color x:Key="DisabledBorderLightColor">#FFAAAAAA</Color>
<Color x:Key="DisabledBorderDarkColor">#FF888888</Color>

<Color x:Key="DefaultBorderBrushDarkColor">Black</Color>

<!--Control-specific resources.-->
<Color x:Key="HeaderTopColor">#FFC5CBF9</Color>
<Color x:Key="DatagridCurrentCellBorderColor">Black</Color>
<Color x:Key="SliderTrackDarkColor">#FFC5CBF9</Color>

<Color x:Key="NavButtonFrameColor">#FF3843C4</Color>

<LinearGradientBrush x:Key="MenuPopupBrush"
                     EndPoint="0.5,1"
                     StartPoint="0.5,0">
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="0" />
  <GradientStop Color="{DynamicResource ControlMediumColor}"
                Offset="0.5" />
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="1" />
</LinearGradientBrush>

<LinearGradientBrush x:Key="ProgressBarIndicatorAnimatedFill"
                     StartPoint="0,0"
                     EndPoint="1,0">
  <LinearGradientBrush.GradientStops>
    <GradientStopCollection>
      <GradientStop Color="#000000FF"
                    Offset="0" />
      <GradientStop Color="#600000FF"
                    Offset="0.4" />
      <GradientStop Color="#600000FF"
                    Offset="0.6" />
      <GradientStop Color="#000000FF"
                    Offset="1" />
    </GradientStopCollection>
  </LinearGradientBrush.GradientStops>
</LinearGradientBrush>

Полный пример см. в разделе Пример задания стиля с помощью ControlTemplates.

См. также