<DataTemplate x:Key="TreeViewComponentStyle">
  <Border x:Name="OuterBorder" ContextMenuService.Placement="Left" ContextMenuService.PlacementTarget="{Binding ElementName=OuterBorder}">
    <Border.ContextMenu>
      <ContextMenu Name="MyContextMenu">
        <MenuItem Header="Test" />
      </ContextMenu>
    </Border.ContextMenu>

    <b:Interaction.Triggers>
      <noesis:GamepadTrigger Button="Accept" FiredOn="ButtonDown">
          <b:ChangePropertyAction TargetName="MyContextMenu" PropertyName="IsOpen" Value="True" />

          <b:Interaction.Behaviors>
            <b:ConditionBehavior>
              <b:ConditionalExpression ForwardChaining="And">
                <b:ComparisonCondition LeftOperand="{Binding Path=DataContext.SOMETHING, ElementName=MainWindow}" Operator="Equal" RightOperand="{x:Static model:VALUE_FROM_OUR_VIEW_MODEL}" />
                <b:ComparisonCondition LeftOperand="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type TreeViewItem}}, Path=IsSelected}" Operator="Equal" RightOperand="True" />
              </b:ConditionalExpression>
            </b:ConditionBehavior>
          </b:Interaction.Behaviors>
        </noesis:GamepadTrigger>
      </b:Interaction.Triggers>
  </Border>
</DataTemplate>