WPF Explorer Bar

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:local="clr-namespace:Odyssey.Controls"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Duration x:Key="animTime">0:0:0.4</Duration>
    <Style TargetType="{x:Type local:OdcExpander}">        
        <Setter Property="Background" Value="#40808080"/>
        <Setter Property="BorderBrush" Value="#60404040"/>
        <Setter Property="HeaderBackground" Value="#40A0A0A0"/>
        <Setter Property="MouseOverHeaderBackground" Value="#60FFFFFF"/>
        <Setter Property="MouseOverHeaderForeground" Value="#F0000000"/>
        <Setter Property="HeaderBorderThickness" Value="1"/>
        <Setter Property="CornerRadius" Value="0"/>
        <Setter Property="ShowEllipse" Value="True"/>
        <Setter Property="Padding" Value="8"/>
        <Setter Property="Template">          
            
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:OdcExpander}">
                    <Border>
                        <StackPanel>
                            <local:OdcExpanderHeader x:Name="header"  SnapsToDevicePixels="True"
                                                 BorderThickness="{TemplateBinding HeaderBorderThickness}"
                                                Content="{TemplateBinding Header}" 
                                                 IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent},Path=IsExpanded}"
                                                ContentTemplate="{TemplateBinding HeaderTemplate}"
                                                Background="{TemplateBinding HeaderBackground}"
                                                BorderBrush="{TemplateBinding BorderBrush}"
                                                ShowEllipse="{TemplateBinding ShowEllipse}"
                                                CornerRadius="{TemplateBinding CornerRadius}"
                                                Image="{TemplateBinding Image}"/>
                            <local:AnimationDecorator Grid.Row="1"  SnapsToDevicePixels="True"
                                              Duration="{StaticResource animTime}"
                                              MinHeight="{TemplateBinding MinHeight}"
                                              MaxHeight="{TemplateBinding MaxHeight}"
                                              Height="{TemplateBinding Height}"
                                             IsExpanded="{Binding RelativeSource={RelativeSource TemplatedParent},Path=IsExpanded}">
                                <Border x:Name="panel"  Grid.Row="1" Padding="{TemplateBinding Padding}" 
                                        Background="{TemplateBinding Background}"
                                        BorderThickness="1,0,1,1"
                                        BorderBrush="{TemplateBinding BorderBrush}">
                                        <ContentPresenter 
                                              VerticalAlignment="Bottom"
                                              Content="{TemplateBinding Content}" 
                                              ContentTemplate="{TemplateBinding ContentTemplate}"/>                                    

                                </Border>
                            </local:AnimationDecorator>
                        </StackPanel>
                        <Border.LayoutTransform>
                            <ScaleTransform x:Name="scaleT" ScaleY="1"/>
                        </Border.LayoutTransform>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True" SourceName="header">
                            <Setter Property="Foreground" Value="{Binding RelativeSource={RelativeSource TemplatedParent},Path=MouseOverHeaderForeground}" TargetName="header"/>
                            <Setter Property="Background" Value="{Binding RelativeSource={RelativeSource TemplatedParent},Path=MouseOverHeaderBackground}" TargetName="header"/>
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsPressed" Value="True" SourceName="header"/>
                                <Condition Property="HasPressedBackground" Value="True"/>
                            </MultiTrigger.Conditions>
                            <Setter Property="Background" Value="{Binding RelativeSource={RelativeSource TemplatedParent},Path=PressedHeaderBackground}" TargetName="header"/>
                        </MultiTrigger>
                        <EventTrigger RoutedEvent="local:OdcExpander.MaximizedEvent">
                            <EventTrigger.Actions>
                                <BeginStoryboard>
                                    <Storyboard Storyboard.TargetProperty="ScaleY" >
                                        <DoubleAnimation  To="1" Duration="{StaticResource animTime}" Storyboard.TargetName="scaleT" DecelerationRatio="0.8"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </EventTrigger.Actions>
                        </EventTrigger>
                        <EventTrigger RoutedEvent="local:OdcExpander.MinimizedEvent">
                            <EventTrigger.Actions>
                                <BeginStoryboard>
                                    <Storyboard Storyboard.TargetProperty="ScaleY" >
                                        <DoubleAnimation  To="0" Duration="{StaticResource animTime}" Storyboard.TargetName="scaleT" DecelerationRatio="0.8"/>
                                    </Storyboard>
                                </BeginStoryboard>
                            </EventTrigger.Actions>
                        </EventTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

</ResourceDictionary>