Kepler-Release/Venus/Venus_Themes/UserControls/PendulumValve.xaml

<UserControl x:Class="Venus_Themes.UserControls.PendulumValve"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:Venus_Themes.UserControls"
             mc:Ignorable="d" 
             xmlns:customControls="clr-namespace:Venus_Themes.CustomControls"
             xmlns:converters="clr-namespace:Venus_Themes.Converters"
             d:DesignHeight="450" d:DesignWidth="800" Cursor="Hand" x:Name="valve">

    <UserControl.Resources>
        <converters:PenValveStartValueConverter x:Key="PenValveStartValueConverter"/>
        <converters:PenValveEndValueConverter   x:Key="PenValveEndValueConverter"/>
        <converters:PenValveColorConverter      x:Key="PenValveColorConverter"/>

        <!--<Style TargetType="Border" x:Key="borderBackground">
            <Style.Triggers>
                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=local:PendulumValve},Path=IsOpen}" Value="True">
                    <Setter Property="Background" Value="Red"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>-->
    </UserControl.Resources>

    <Border Width="38" Height="38"  CornerRadius="19" Background="{Binding ElementName=valve,Path=IsOpen,Converter={StaticResource PenValveColorConverter}}"   BorderBrush="White" BorderThickness="1">
        <Grid>
            <customControls:Arc Rect="0,0,36,36" StartAngle="{Binding ElementName=valve,Path=Opening,Converter={StaticResource PenValveStartValueConverter}}" EndAngle="{Binding ElementName=valve,Path=Opening,Converter={StaticResource PenValveEndValueConverter}}" Stroke="SkyBlue" StrokeThickness="1" Fill="Lime"/>
            <TextBlock Text="{Binding ElementName=valve,Path=Opening}" HorizontalAlignment="Center" VerticalAlignment="Center" Foreground="Gray"/>
        </Grid>
    </Border>
</UserControl>