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ScrollBar Styles and Templates

This topic describes the styles and templates for the ScrollBar control. You can modify the default ControlTemplate to give the control a unique appearance. For more information, see Customizing the Appearance of an Existing Control by Creating a ControlTemplate.

The following table lists the named parts for the ScrollBar control.

Part

Type

Description

PART_Track

Track

The container for the element that indicates the position of the ScrollBar.

The following table lists the visual states for the ScrollBar control.

VisualState Name

VisualStateGroup Name

Description

Normal

CommonStates

The default state.

MouseOver

CommonStates

The mouse pointer is positioned over the control.

Disabled

CommonStates

The control is disabled.

Valid

ValidationStates

The control uses the Validation class and the Validation.HasError attached property is false.

InvalidFocused

ValidationStates

The Validation.HasError attached property is true has the control has focus.

InvalidUnfocused

ValidationStates

The Validation.HasError attached property is true has the control does not have focus.

The following example shows how to define a ControlTemplate for the ScrollBar control.

<Style x:Key="ScrollBarLineButton"
       TargetType="{x:Type RepeatButton}">
  <Setter Property="SnapsToDevicePixels"
          Value="True" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Setter Property="Focusable"
          Value="false" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type RepeatButton}">
        <Border x:Name="Border"
                Margin="1"
                CornerRadius="2"
                BorderThickness="1">
          <Border.BorderBrush>
            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="0,1">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource BorderMediumColor}"
                                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>
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
              <VisualState x:Name="Normal" />
              <VisualState x:Name="MouseOver" />
              <VisualState x:Name="Pressed">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                                Storyboard.TargetProperty="(Panel.Background).
                    (GradientBrush.GradientStops)[1].(GradientStop.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource ControlPressedColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
              <VisualState x:Name="Disabled">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Arrow"
                                                Storyboard.TargetProperty="(Shape.Fill).
                    (SolidColorBrush.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource DisabledForegroundColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <Path x:Name="Arrow"
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                Data="{Binding Content, 
            RelativeSource={RelativeSource TemplatedParent}}" >
          	<Path.Fill>
          		<SolidColorBrush Color="{DynamicResource GlyphColor}"/>
          	</Path.Fill>
          </Path>
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<Style x:Key="ScrollBarPageButton"
       TargetType="{x:Type RepeatButton}">
  <Setter Property="SnapsToDevicePixels"
          Value="True" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Setter Property="IsTabStop"
          Value="false" />
  <Setter Property="Focusable"
          Value="false" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type RepeatButton}">
        <Border Background="Transparent" />
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<Style x:Key="ScrollBarThumb"
       TargetType="{x:Type Thumb}">
  <Setter Property="SnapsToDevicePixels"
          Value="True" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Setter Property="IsTabStop"
          Value="false" />
  <Setter Property="Focusable"
          Value="false" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type Thumb}">
        <Border CornerRadius="2"
                Background="{TemplateBinding Background}"
                BorderBrush="{TemplateBinding BorderBrush}"
                BorderThickness="1" />
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<ControlTemplate x:Key="VerticalScrollBar"
                 TargetType="{x:Type ScrollBar}">
  <Grid>
    <Grid.RowDefinitions>
      <RowDefinition MaxHeight="18" />
      <RowDefinition Height="0.00001*" />
      <RowDefinition MaxHeight="18" />
    </Grid.RowDefinitions>
    <Border Grid.RowSpan="3"
            CornerRadius="2"
            Background="#F0F0F0" />
    <RepeatButton Grid.Row="0"
                  Style="{StaticResource ScrollBarLineButton}"
                  Height="18"
                  Command="ScrollBar.LineUpCommand"
                  Content="M 0 4 L 8 4 L 4 0 Z" />
    <Track x:Name="PART_Track"
           Grid.Row="1"
           IsDirectionReversed="true">
      <Track.DecreaseRepeatButton>
        <RepeatButton Style="{StaticResource ScrollBarPageButton}"
                      Command="ScrollBar.PageUpCommand" />
      </Track.DecreaseRepeatButton>
      <Track.Thumb>
        <Thumb Style="{StaticResource ScrollBarThumb}"
               Margin="1,0,1,0">
          <Thumb.BorderBrush>

            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="1,0">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource BorderLightColor}"
                                Offset="0.0" />
                  <GradientStop Color="{DynamicResource BorderDarkColor}"
                                Offset="1.0" />
                </GradientStopCollection>
              </LinearGradientBrush.GradientStops>
            </LinearGradientBrush>

          </Thumb.BorderBrush>
          <Thumb.Background>

            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="1,0">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource ControlLightColor}"
                                Offset="0.0" />
                  <GradientStop Color="{DynamicResource ControlMediumColor}"
                                Offset="1.0" />
                </GradientStopCollection>
              </LinearGradientBrush.GradientStops>
            </LinearGradientBrush>

          </Thumb.Background>
        </Thumb>
      </Track.Thumb>
      <Track.IncreaseRepeatButton>
        <RepeatButton Style="{StaticResource ScrollBarPageButton}"
                      Command="ScrollBar.PageDownCommand" />
      </Track.IncreaseRepeatButton>
    </Track>
    <RepeatButton Grid.Row="3"
                  Style="{StaticResource ScrollBarLineButton}"
                  Height="18"
                  Command="ScrollBar.LineDownCommand"
                  Content="M 0 0 L 4 4 L 8 0 Z" />
  </Grid>
</ControlTemplate>

<ControlTemplate x:Key="HorizontalScrollBar"
                 TargetType="{x:Type ScrollBar}">
  <Grid>
    <Grid.ColumnDefinitions>
      <ColumnDefinition MaxWidth="18" />
      <ColumnDefinition Width="0.00001*" />
      <ColumnDefinition MaxWidth="18" />
    </Grid.ColumnDefinitions>
    <Border Grid.ColumnSpan="3"
            CornerRadius="2"
            Background="#F0F0F0" />
    <RepeatButton Grid.Column="0"
                  Style="{StaticResource ScrollBarLineButton}"
                  Width="18"
                  Command="ScrollBar.LineLeftCommand"
                  Content="M 4 0 L 4 8 L 0 4 Z" />
    <Track x:Name="PART_Track"
           Grid.Column="1"
           IsDirectionReversed="False">
      <Track.DecreaseRepeatButton>
        <RepeatButton Style="{StaticResource ScrollBarPageButton}"
                      Command="ScrollBar.PageLeftCommand" />
      </Track.DecreaseRepeatButton>
      <Track.Thumb>
        <Thumb Style="{StaticResource ScrollBarThumb}"
               Margin="0,1,0,1">

          <Thumb.BorderBrush>

            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="1,0">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource BorderLightColor}"
                                Offset="0.0" />
                  <GradientStop Color="{DynamicResource BorderDarkColor}"
                                Offset="1.0" />
                </GradientStopCollection>
              </LinearGradientBrush.GradientStops>
            </LinearGradientBrush>

          </Thumb.BorderBrush>
          <Thumb.Background>

            <LinearGradientBrush StartPoint="0,0"
                                 EndPoint="0,1">
              <LinearGradientBrush.GradientStops>
                <GradientStopCollection>
                  <GradientStop Color="{DynamicResource ControlLightColor}"
                                Offset="0.0" />
                  <GradientStop Color="{DynamicResource ControlMediumColor}"
                                Offset="1.0" />
                </GradientStopCollection>
              </LinearGradientBrush.GradientStops>
            </LinearGradientBrush>

          </Thumb.Background>
        </Thumb>
      </Track.Thumb>
      <Track.IncreaseRepeatButton>
        <RepeatButton Style="{StaticResource ScrollBarPageButton}"
                      Command="ScrollBar.PageRightCommand" />
      </Track.IncreaseRepeatButton>
    </Track>
    <RepeatButton Grid.Column="3"
                  Style="{StaticResource ScrollBarLineButton}"
                  Width="18"
                  Command="ScrollBar.LineRightCommand"
                  Content="M 0 0 L 4 4 L 0 8 Z" />
  </Grid>
</ControlTemplate>

<Style x:Key="{x:Type ScrollBar}"
       TargetType="{x:Type ScrollBar}">
  <Setter Property="SnapsToDevicePixels"
          Value="True" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Style.Triggers>
    <Trigger Property="Orientation"
             Value="Horizontal">
      <Setter Property="Width"
              Value="Auto" />
      <Setter Property="Height"
              Value="18" />
      <Setter Property="Template"
              Value="{StaticResource HorizontalScrollBar}" />
    </Trigger>
    <Trigger Property="Orientation"
             Value="Vertical">
      <Setter Property="Width"
              Value="18" />
      <Setter Property="Height"
              Value="Auto" />
      <Setter Property="Template"
              Value="{StaticResource VerticalScrollBar}" />
    </Trigger>
  </Style.Triggers>
</Style>

The preceding example uses one or more of the following resources.

<!--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>

For the complete sample, see Styling with ControlTemplates Sample.

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