Virgo_ST/VirgoUI/Controls/Parts/WaferCtrl.xaml

<UserControl x:Class="VirgoUI.Controls.Parts.WaferCtrl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
             xmlns:cal="http://www.caliburn.org"     
             xmlns:ctrl="http://OpenSEMI.Ctrlib.com/presentation">
    <Grid RenderTransformOrigin="0.5,0.5">
        <ctrl:Slot ViewType="Top" WaferStatus="{Binding WaferStatus}" SlotID="{Binding SlotID}" ModuleID="{Binding ModuleID}" SourceName="{Binding SourceName}" 
                       DataContext="{Binding WaferData,RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}"  HorizontalAlignment="Center" VerticalAlignment="Center">
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="SlotMouseButtonDown">
                    <cal:ActionMessage MethodName="OnMouseUp">
                        <cal:Parameter Value="$source" />
                        <cal:Parameter Value="$eventargs" />
                    </cal:ActionMessage>
                </i:EventTrigger>
                <i:EventTrigger EventName="WaferTransferStarted">
                    <cal:ActionMessage MethodName="OnWaferTransfer">
                        <cal:Parameter Value="$eventargs" />
                    </cal:ActionMessage>
                </i:EventTrigger>
            </i:Interaction.Triggers>
        </ctrl:Slot>
    </Grid>
</UserControl>