[WPF] Slider Custom Style

WPF 기본 Slider Stlye에서 Thumb을 드래그할 때마다 박스 안에 숫자가 표시되도록 Style을 하였습니다.

Slider 모양

Style 추가

App.xaml 에 추가하거나 Resource.xaml 파일을 생성하여 Style 을 추가합니다.

<SolidColorBrush x:Key="CustomSliderBackgroundSolidColorBrush" Color="#1E211B" />

<LinearGradientBrush x:Key="CustomSliderForegroundBrush" StartPoint="0,0" EndPoint="0,1">
    <GradientStop Color="#65351F" Offset="0.2" />
    <GradientStop Color="#9B5B2B" Offset="0.5" />
    <GradientStop Color="#65351F" Offset="0.8" />
</LinearGradientBrush>

<LinearGradientBrush x:Key="CustomSliderThumBrush" StartPoint="0,0" EndPoint="0,1">
    <GradientStop Color="#3B3C39" Offset="0.2" />
    <GradientStop Color="#454543" Offset="0.5" />
    <GradientStop Color="#3B3C39" Offset="0.8" />
</LinearGradientBrush>

<Style x:Key="CustomSliderThumbStyle" TargetType="{x:Type Thumb}">
    <Setter Property="Focusable" Value="false"/>
    <Setter Property="SnapsToDevicePixels" Value="true"/>
    <Setter Property="OverridesDefaultStyle" Value="true"/>
    <Setter Property="Height" Value="20"/>
    <Setter Property="Width" Value="30"/>
    <Setter Property="Cursor" Value="Hand"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Thumb}">
                <Canvas SnapsToDevicePixels="true">
                    <Grid Height="20" Width="30">
                        <Rectangle x:Name="Background"
                            Fill="{StaticResource CustomSliderThumBrush}" Stroke="#FFDADADA"
                            Height="20" Width="30"
                            RadiusX="3" RadiusY="3"/>
                        <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center"
                            Foreground="White" FontSize="10"
                            Text="{Binding Value, RelativeSource={RelativeSource AncestorType={x:Type Slider}}}"/>
                    </Grid>
                </Canvas>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="true">
                        <Setter Property="Fill" TargetName="Background" Value="Orange"/>
                    </Trigger>
                    <Trigger Property="IsDragging" Value="true">
                        <Setter Property="Fill" TargetName="Background" Value="{StaticResource CustomSliderThumBrush}"/>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="false">
                        <Setter Property="Fill" TargetName="Background"  Value="Gray"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

<ControlTemplate x:Key="CustomSliderControlTemplate" TargetType="{x:Type Slider}">
    <Border Background="Transparent" SnapsToDevicePixels="True">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="{TemplateBinding MinHeight}" />
            </Grid.RowDefinitions>

            <DockPanel LastChildFill="True">
                <Border x:Name="PART_SelectionRange" Height="5" ClipToBounds="True" Visibility="Visible">
                    <Rectangle Margin="0 0 -10 0" RadiusX="2" RadiusY="2" Fill="{StaticResource CustomSliderForegroundBrush}" />
                </Border>
                <Border ClipToBounds="True" Height="5" Visibility="Visible">
                    <Rectangle Margin="0 0 0 0" RadiusX="2" RadiusY="2" Fill="{StaticResource CustomSliderBackgroundSolidColorBrush}" />
                </Border>
            </DockPanel>

            <Track x:Name="PART_Track">
                <Track.Thumb>
                    <Thumb Style="{StaticResource CustomSliderThumbStyle}" VerticalAlignment="Center"
                            Width="{TemplateBinding MinWidth}" Height="{TemplateBinding MinHeight}" OverridesDefaultStyle="True" Focusable="False" />
                </Track.Thumb>
            </Track>
        </Grid>
    </Border>
</ControlTemplate>

<Style x:Key="CustomSliderStyle" TargetType="{x:Type Slider}">
    <Setter Property="Template" Value="{StaticResource CustomSliderControlTemplate}" />
    <Setter Property="VerticalAlignment" Value="Center" />
    <Setter Property="MinWidth" Value="30" />
    <Setter Property="MinHeight" Value="20" />
    <Setter Property="Height" Value="20" />
    <Setter Property="MaxHeight" Value="20" />
    <Setter Property="BorderBrush" Value="Transparent" />
    <Setter Property="Background" Value="Transparent" />
    <Setter Property="AutoToolTipPlacement" Value="None" />
    <Setter Property="IsMoveToPointEnabled" Value="True" />
    <Setter Property="SelectionStart" Value="0" />
    <Setter Property="SelectionEnd" Value="{Binding Path=Value, RelativeSource={RelativeSource Self}}" />
    <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false" />
</Style>

Slider Style 적용

아래와 같이 Slider 에 Style을 지정합니다.

<Slider Minimum="1" Maximum="255" IsSnapToTickEnabled="True" Style="{StaticResource CustomSliderStyle}"/>