SliderCheckBox.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style x:Key="CheckRadioFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle Margin="14,0,0,0" SnapsToDevicePixels="true" 
                               Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" 
                               StrokeThickness="1" 
                               StrokeDashArray="1 2"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="SliderCheckBox" TargetType="{x:Type CheckBox}">
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Cursor" Value="Hand" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type CheckBox}">
                    <ControlTemplate.Resources>
                        <Storyboard x:Key="StoryboardIsChecked">
                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="CheckFlag">
                                <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                                <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="14"/>
                            </DoubleAnimationUsingKeyFrames>
                        </Storyboard>
                        <Storyboard x:Key="StoryboardIsCheckedOff">
                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="CheckFlag">
                                <EasingDoubleKeyFrame KeyTime="0" Value="14"/>
                                <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0"/>
                            </DoubleAnimationUsingKeyFrames>
                        </Storyboard>
                    </ControlTemplate.Resources>
                    <BulletDecorator Background="Transparent" SnapsToDevicePixels="true">
                        <BulletDecorator.Bullet>
                            <Border x:Name="ForegroundPanel" BorderThickness="1" Width="35" Height="20" CornerRadius="10">
                                <Canvas>
                                    <Border Background="White" x:Name="CheckFlag" CornerRadius="10" VerticalAlignment="Center" BorderThickness="1" Width="19" Height="18" RenderTransformOrigin="0.5,0.5">
                                        <Border.RenderTransform>
                                            <TransformGroup>
                                                <ScaleTransform/>
                                                <SkewTransform/>
                                                <RotateTransform/>
                                                <TranslateTransform/>
                                            </TransformGroup>
                                        </Border.RenderTransform>
                                        <Border.Effect>
                                            <DropShadowEffect ShadowDepth="1" Direction="180" />
                                        </Border.Effect>
                                    </Border>
                                </Canvas>
                            </Border>
                        </BulletDecorator.Bullet>
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
                    </BulletDecorator>
                    <ControlTemplate.Triggers>
                        <Trigger Property="HasContent" Value="true">
                            <Setter Property="FocusVisualStyle" Value="{StaticResource CheckRadioFocusVisual}"/>
                            <Setter Property="Padding" Value="4,0,0,0"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter TargetName="ForegroundPanel" Property="Background" Value="Orange" /><!--Value="{DynamicResource Accent}"-->
                            <Trigger.EnterActions>
                                <BeginStoryboard x:Name="BeginStoryboardCheckedTrue" Storyboard="{StaticResource StoryboardIsChecked}" />
                                <RemoveStoryboard BeginStoryboardName="BeginStoryboardCheckedFalse" />
                            </Trigger.EnterActions>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="False">
                            <Setter TargetName="ForegroundPanel" Property="Background" Value="Gray" />
                            <Trigger.EnterActions>
                                <BeginStoryboard x:Name="BeginStoryboardCheckedFalse" Storyboard="{StaticResource StoryboardIsCheckedOff}" />
                                <RemoveStoryboard BeginStoryboardName="BeginStoryboardCheckedTrue" />
                            </Trigger.EnterActions>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>